headshot

Luis Vallejo

Professor
Civil & Environmental Engr

overview

The stability and evolution mechanics of natural slopes. Application of Fracture Mechanics and Fractal theories to geotechnical engineering. The cracking of soils. The interface shear strength between soils and geomembranes. The shear strength of soils. The mobilization mechanics of mudflows and debris flows. The mechanics of sand liquefaction. Utilization of waste materials in civil engineering construction. The mechanics of the slaking of shales. The mechanical properties of cellular concrete. The mechanics of crushing of granular materials. Subsidence due to long wall mining.

about

(2010) Honorable Mention to Paper presented and published in the ASCE's Proceedings of Geoflorida 2010, West Palm Beach, Florida, February 2010..

(2008) Member of the Editorial Board of the international journal: Geomechanics and Engineering, October 2008 to date.

(2006) Best Paper Award on the subject of Numerical Analysis, Geocongress 2006: Geotechnical Engineering in the Information Technology Age, Atlanta, Georgia, February 26, 2006..

(2004) Associate Editor of the ASCE's Journal of Geotechnical and Geo-environmental Engineering, Nov. 1, 2004 to date.

(2001) Member of the Editorial Board of the International Journal Engineering Geology, 2001 to date..

(2000) Morada al Sur Award from the State of Nariño, Colombia for Contributions to Education and Technology; September 2000.

(1991) Award for Superior Performance, Office of Surface Mining, U.S. Dept. of the Interior, Pittsburgh, 1991.

(1988) Honorable Mention for Research, Sigma Xi, 1988..

(1986 - 1987) Lilly Endowment Teaching Fellowship for Excellence in Teaching, May 1986 to April 1987.

(1970 - 1974) Tuition Scholarship, Washington State University (1970-1972) and Michigan State University (1973-1974)..

PhD, Civil Engineering, University of Wisconsin, 1977

MS, Civil Engineering, Michigan State University, 1974

BS, Civil Engineering, Washington State University, 1972

Espitia, J.M., Caicedo, B., & Vallejo, L. (2020). Long-term and short-term uniaxial strength of the belencito claystone in unsaturated conditions. 2284-2291.

Qin, X., Gu, C., Shao, C., Chen, Y., Vallejo, L., & Zhao, E. (2020). Safety evaluation with observational data and numerical analysis of Langyashan reinforced concrete face rockfill dam. BULLETIN OF ENGINEERING GEOLOGY AND THE ENVIRONMENT, 79(7), 3497-3515.Springer Science and Business Media LLC. doi: 10.1007/s10064-020-01790-2.

Qin, X., Gu, C., Shao, C., Fu, X., Vallejo, L., & Chen, Y. (2020). Numerical analysis of fracturing behavior in fully-graded concrete with oversized aggregates from mesoscopic perspective. CONSTRUCTION AND BUILDING MATERIALS, 253, 119184.Elsevier BV. doi: 10.1016/j.conbuildmat.2020.119184.

Castro, J., Vallejo, L.E., & Estrada, N. (2019). The optimal design of the retaining walls built by the Incas in their agricultural terraces. JOURNAL OF CULTURAL HERITAGE, 36, 232-237.Elsevier BV. doi: 10.1016/j.culher.2018.09.013.

Espitia, J.M., Caicedo, B., & Vallejo, L. (2019). Comparison of the Uniaxial Compressive Strength of the Belencito Claystone Under Stress Control and Suction Control Paths. Rock Mechanics and Rock Engineering, 52(1), 19-34.Springer Science and Business Media LLC. doi: 10.1007/s00603-018-1588-9.

Lai, Z., Vallejo, L.E., Zhou, W., Ma, G., Espitia, J.M., Caicedo, B., & Chang, X. (2017). Collapse of Granular Columns With Fractal Particle Size Distribution: Implications for Understanding the Role of Small Particles in Granular Flows. GEOPHYSICAL RESEARCH LETTERS, 44(24), 12181-12189.American Geophysical Union (AGU). doi: 10.1002/2017GL075689.

Caicedo, B., Ocampo, M., & Vallejo, L. (2016). Modelling comminution of granular materials using a linear packing model and Markovian processes. COMPUTERS AND GEOTECHNICS, 80, 383-396.Elsevier BV. doi: 10.1016/j.compgeo.2016.01.022.

Wang, Z., Liu, S., Vallejo, L., & Wang, L. (2014). Numerical analysis of the causes of face slab cracks in Gongboxia rockfill dam. ENGINEERING GEOLOGY, 181, 224-232.Elsevier BV. doi: 10.1016/j.enggeo.2014.07.019.

Gutierrez, J.J., & Vallejo, L.E. (2013). Laboratory Experiments on the Hydraulic Conductivity of Sands with Dispersed Rock Particles. Geotechnical and Geological Engineering, 31(4), 1405-1410.Springer Science and Business Media LLC. doi: 10.1007/s10706-013-9652-4.

Vallejo, L.E., Shettima, M., & Alaasmi, A. (2013). Unconfined compressive strength of brittle material containing multiple cracks. International Journal of Geotechnical Engineering, 7(3), 318-321.Informa UK Limited. doi: 10.1179/1938636213z.00000000035.

Caicedo, B., Ocampo, M., Vallejo, L., & Monroy, J. (2012). Hollow cylinder apparatus for testing unbound granular materials of pavements. ROAD MATERIALS AND PAVEMENT DESIGN, 13(3), 455-479.Informa UK Limited. doi: 10.1080/14680629.2012.694093.

Kutschke, W.G., & Vallejo, L.E. (2012). Investigation of Lateral Stress Relief Using Finite Elements and Fracture Mechanics: Case History Study of the Saxon Pit. JOURNAL OF GEOTECHNICAL AND GEOENVIRONMENTAL ENGINEERING, 138(10), 1277-1283.American Society of Civil Engineers (ASCE). doi: 10.1061/(ASCE)GT.1943-5606.0000688.

Vallejo, L., & Lobo-Guerrero, S. (2012). The shear strength of granular materials containing dispersed oversized particles: DEM analysis. International Journal of Geotechnical Engineering, 6(3), 371-380.Informa UK Limited. doi: 10.3328/ijge.2012.06.03.371-379.

Vallejo, L.E. (2012). Analysis of the failure of a rock slope in Tulum, Mexico. Revista Internacional de Desastres Naturales, 12(1), 97-101.

Vallejo, L.E. (2012). Fractal evaluation of the level of alligator cracking in pavements. GEOMECHANICS AND ENGINEERING, 4(3), 219-227.Techno-Press. doi: 10.12989/gae.2012.4.3.219.

Vallejo, L.E., & Abu-Ali, S. (2012). The Influence of Crack Roughness on the Compression and Shear Strengths of Brittle Fissured Materials. GeoCongress 2012, (225 GSP), 3314-3322.American Society of Civil Engineers. doi: 10.1061/9780784412121.339.

Kutschke, W.G., & Vallejo, L.E. (2011). Stability and Impacts of Unsupported Vertical Cuts in Stiff Clay. Geo-Frontiers 2011, (211 GSP), 3619-3628.American Society of Civil Engineers. doi: 10.1061/41165(397)370.

Vallejo, L.E. (2011). Mechanics of the slaking of shales. GEOMECHANICS AND ENGINEERING, 3(3), 219-231.Techno-Press. doi: 10.12989/gae.2011.3.3.219.

Vallejo, L.E. (2011). Fracture Criteria for Fissured Clays under Mixed-Mode Loading. Geo-Frontiers 2011, (211 GSP), 3858-3867.American Society of Civil Engineers. doi: 10.1061/41165(397)394.

Vallejo, L.E., & Au, M.M.C. (2011). Shaking Table Tests on Dry and Saturated Sand with Large Embedded Objects. Geo-Frontiers 2011, (211 GSP), 4408-4417.American Society of Civil Engineers. doi: 10.1061/41165(397)451.

Kutschke, W.G., & Vallejo, L.E. (2010). Failure Analysis of an Instrumented Stiff Clay Slope. GeoFlorida 2010, (199), 1786-1795.American Society of Civil Engineers. doi: 10.1061/41095(365)181.

Lobo-Guerrero, S., & Vallejo, L. (2010). DEM analysis of the effect of granular crushing on the bearing capacity of footings. International Journal of Geotechnical Engineering, 4(3), 351-359.Informa UK Limited. doi: 10.3328/ijge.2010.04.03.351-359.

Lobo-Guerrero, S., & Vallejo, L.E. (2010). The effectiveness of geosynthetic reinforcement, tamping, and stoneblowing of railtrack ballast beds under dynamic loading: DEM analysis. GEOMECHANICS AND ENGINEERING, 2(3), 161-176.Techno-Press. doi: 10.12989/gae.2010.2.3.161.

Lobo-Guerrero, S., & Vallejo, L.E. (2010). Fibre-reinforcement of granular materials: DEM visualisation and analysis. Geomechanics and Geoengineering, 5(2), 79-89.Informa UK Limited. doi: 10.1080/17486020903348709.

Lobo-Guerrero, S., & Vallejo, L.E. (2010). Crushing of Particles under Simulated Static and Centrifuge Forces. GeoFlorida 2010, (199), 550-559.American Society of Civil Engineers. doi: 10.1061/41095(365)52.

Vallejo, L.E., & Chik, Z. (2010). Measurement of the Abrasion of Granular Materials Using Fractals. GeoFlorida 2010, (199), 560-569.American Society of Civil Engineers. doi: 10.1061/41095(365)53.

Vallejo, L.E., & Pappas, D. (2010). Effect of Nondurable Material on Settlement of Embankments. TRANSPORTATION RESEARCH RECORD, 2170(2170), 84-89.SAGE Publications. doi: 10.3141/2170-10.

Vesga, L.F., & Vallejo, L.E. (2010). Analysis of Particle Shape Using Fractals. GeoFlorida 2010, (199), 638-645.American Society of Civil Engineers. doi: 10.1061/41095(365)61.

Vallejo, L.E. (2009). Fractal analysis of temperature-induced cracking in clays and rocks. GEOTECHNIQUE, 59(3), 283-286.Thomas Telford Ltd. doi: 10.1680/geot.2009.59.3.283.

Vallejo, L.E., & Chik, Z. (2009). Fractal and laboratory analyses of the crushing and abrasion of granular materials. GEOMECHANICS AND ENGINEERING, 1(4), 323-335.Techno-Press. doi: 10.12989/gae.2009.1.4.323.

Vesga, L.F., Vallejo, L.E., & Lobo-Guerrero, S. (2008). DEM analysis of the crack propagation in brittle clays under uniaxial compression tests. INTERNATIONAL JOURNAL FOR NUMERICAL AND ANALYTICAL METHODS IN GEOMECHANICS, 32(11), 1405-1415.Wiley. doi: 10.1002/nag.665.

Lobo-Guerrero, S., & Vallejo, L.E. (2007). Influence of pile shape and pile interaction on the crushable behavior of granular materials around driven piles: DEM analyses. GRANULAR MATTER, 9(3-4), 241-250.Springer Science and Business Media LLC. doi: 10.1007/s10035-007-0037-3.

Lobo-Guerrero, S., & Vallejo, L.E. (2006). Modeling granular crushing in ring shear tests: experimental and numerical analyses. Soils and Foundations, 46(2), 39-49.

Lobo-Guerrero, S., & Vallejo, L.E. (2006). Discrete element method analysis of railtrack ballast degradation during cyclic loading. GRANULAR MATTER, 8(3-4), 195-204.Springer Science and Business Media LLC. doi: 10.1007/s10035-006-0006-2.

Lobo-Guerrero, S., & Vallejo, L.E. (2006). Application of Weibull statistics to the tensile strength of rock aggregates. Journal of Geotechnical and Geoenvironmental Engineering, 32(6), 786-790.

Lobo-Guerrero, S., & Vallejo, L.E. (2006). Modeling granular crushing in ring shear tests: Experimental and numerical analyses. SOILS AND FOUNDATIONS, 46(2), 147-157.Elsevier BV. doi: 10.3208/sandf.46.147.

Lobo-Guerrero, S., & Vallejo, L.E. (2006). Application of Weibull statistics to the tensile strength of rock aggregates. JOURNAL OF GEOTECHNICAL AND GEOENVIRONMENTAL ENGINEERING, 132(6), 786-790.American Society of Civil Engineers (ASCE). doi: 10.1061/(ASCE)1090-0241(2006)132:6(786).

Lobo-Guerrero, S., Vallejo, L.E., & Vesga, L.F. (2006). Visualization of Crushing Evolution in Granular Materials under Compression Using DEM. International Journal of Geomechanics, 6(3), 195-200.American Society of Civil Engineers (ASCE). doi: 10.1061/(asce)1532-3641(2006)6:3(195).

Vallejo, L.E., Lobo-Guerrero, S., & Hammer, K. (2006). Degradation of a Granular Base under a Flexible Pavement: DEM Simulation. International Journal of Geomechanics, 6(6), 435-439.American Society of Civil Engineers (ASCE). doi: 10.1061/(asce)1532-3641(2006)6:6(435).

Chik, Z., & Vallejo, L. (2005). Characterization of the angle of repose of binary granular materials. CANADIAN GEOTECHNICAL JOURNAL, 42(2), 683-692.Canadian Science Publishing. doi: 10.1139/T04-118.

Lobo-Guerrero, S., & Vallejo, L.E. (2005). Crushing a weak granular material: experimental numerical analyses. GEOTECHNIQUE, 55(3), 245-249.Thomas Telford Ltd. doi: 10.1680/geot.55.3.245.61523.

Lobo-Guerrero, S., & Vallejo, L.E. (2005). Analysis of crushing of granular material under isotropic and biaxial stress conditions. SOILS AND FOUNDATIONS, 45(4), 79-87.The Japanese Geotechnical Society. doi: 10.3208/sandf.45.4_79.

Lobo-Guerrero, S., & Vallejo, L.E. (2005). DEM simulation of crushing of granular materials under direct shear stress conditions. Journal of Geotechnical and Geoenvironmental Engineering, 131(10), 1295-1300.

Lobo-Guerrero, S., & Vallejo, L.E. (2005). DEM analysis of crushing around driven piles in granular materials. GEOTECHNIQUE, 55(8), 617-623.Thomas Telford Ltd. doi: 10.1680/geot.2005.55.8.617.

Lobo-Guerrero, S., & Vallejo, L.E. (2005). Discrete element method evaluation of granular crushing under direct shear test conditions. JOURNAL OF GEOTECHNICAL AND GEOENVIRONMENTAL ENGINEERING, 131(10), 1295-1300.American Society of Civil Engineers (ASCE). doi: 10.1061/(ASCE)1090-0241(2005)131:10(1295).

Vallejo, L.E., & Lobo-Guerrero, S. (2005). The elastic moduli of clays with dispersed oversized particles. ENGINEERING GEOLOGY, 78(1-2), 163-171.Elsevier BV. doi: 10.1016/j.enggeo.2004.12.003.

Vallejo, L.E., & Lobo-Guerrero, S. (2005). The elastic moduli of clays with dispersed oversized particles. Engineering Geology, 78(1-2), 163-171. doi: 10.1016/j.enggeo.2004.12.003.

Vallejo, L.E., Lobo-Guerrero, S., & Chik, Z. (2005). A Network of Fractal Force Chains and Their Effect in Granular Materials under Compression. In Fractals in Engineering. (pp. 67-80).Springer-Verlag. doi: 10.1007/1-84628-048-6_5.

Vallejo, L.E., & Scovazzo, V.A. (2003). Determination of the shear strength parameters associated with mudflows. SOILS AND FOUNDATIONS, 43(2), 129-133.Elsevier BV. doi: 10.3208/sandf.43.2_129.

Vallejo, L.E. (2001). Interpretation of the limits in shear strength in binary granular mixtures. CANADIAN GEOTECHNICAL JOURNAL, 38(5), 1097-1104.Canadian Science Publishing. doi: 10.1139/cgj-38-5-1097.

Vallejo, L.E. (2001). Fractal assessment of the surface texture of pavements. International Journal of Pavement Engineering, 2(2), 149-156.

Iannacchione, A.T., & Vallejo, L.E. (2000). Shear strength evaluation of clay-rock mixtures. Geotechnical Special Publication, (101), 209-223.

Vallejo, L.E., & Mawby, R. (2000). Porosity influence on the shear strength of granular material-clay mixtures. ENGINEERING GEOLOGY, 58(2), 125-136.Elsevier BV. doi: 10.1016/S0013-7952(00)00051-X.

Hu, W., Neufeld, R.D., Vallejo, L.E., Kelly, C., & Latona, M. (1997). Properties of autoclaved cellular concrete with high volume fly ash. JOURNAL OF ENERGY ENGINEERING-ASCE, 123(2), 44-54.American Society of Civil Engineers (ASCE). doi: 10.1061/(ASCE)0733-9402(1997)123:2(44).

Hu, W., Neufeld, R.D., Vallejo, L.E., Kelly, C., & Latona, M.C. (1997). Strength properties of autoclaved cellular concrete with high volume fly ash. Journal of Energy Engineering, ASCE, 123(2), 44-54.

Huang, C.P., Chaparro, L.F., & Vallejo, L.E. (1997). Fractal dimension of profiles and surfaces using fuzzy morphological coverings. ENGINEERING GEOLOGY, 48(3-4), 245-253.Elsevier BV. doi: 10.1016/S0013-7952(97)00039-2.

Hyslip, J.P., & Vallejo, L.E. (1997). Fractal analysis of the roughness and size distribution of granular materials. ENGINEERING GEOLOGY, 48(3-4), 231-244.Elsevier BV. doi: 10.1016/S0013-7952(97)00046-X.

Latona, M.C., Neufeld, R.D., Hu, W., Kelly, C., & Vallejo, L.E. (1997). Response of MICROTOX organisms to leachates of autoclaved cellular concrete. JOURNAL OF ENERGY ENGINEERING-ASCE, 123(2), 35-43.American Society of Civil Engineers (ASCE). doi: 10.1061/(ASCE)0733-9402(1997)123:2(35).

Latona, M.C., Neufeld, R.D., Vallejo, L.E., Brandon, D., Hu, W., & Kelly, C. (1997). Leachate and radon production from fly ash autoclaved cellular concrete. JOURNAL OF ENERGY ENGINEERING-ASCE, 123(2), 55-67.American Society of Civil Engineers (ASCE). doi: 10.1061/(ASCE)0733-9402(1997)123:2(55).

Latona, M.C., Neufeld, R.D., Vallejo, L.E., Hu, W., & Kelly, C. (1997). Leachate formation and random exhalation from fly ash autoclaved cellular concrete. Journal of Energy Engineering, ASCE, 123(2), 55-67.

Nettleship, I., Cisko, L., & Vallejo, L.E. (1997). Aggregation of clay in the hydrometer test. CANADIAN GEOTECHNICAL JOURNAL, 34(4), 621-626.Canadian Science Publishing. doi: 10.1139/t97-026.

Pappas, D.M., & Vallejo, L.E. (1997). The settlement and degradation of non- durable shales associated with coal mine embankments. International Journal of Rock Mechanics and Mining Sciences, 34(3-4), 779-789.

Pappas, D.M., & Vallejo, L.E. (1997). The settlement and degradation of nondurable shales associated with coal mine waste embankments. International Journal of Rock Mechanics and Mining Sciences, 34(3-4), 241.e1-241.e13.Elsevier BV. doi: 10.1016/s1365-1609(97)00187-1.

Vallejo, L.E. (1997). Surge Wave Development in Debris Flows. Soils and Foundations, 37(4), 115-119.Elsevier BV. doi: 10.3208/sandf.37.4_115.

Vallejo, L.E. (1997). Fractals in engineering geology. Engineering Geology, 48(3-4), 159-161.

Vallejo, L.E. (1997). Discussion of: Modeling lateral sliding of slope due to liquefaction of sand layer. Journal of Geotechnical Engineering, ASCE, 123(1), 80-82.

Vallejo, L.E. (1997). Modeling lateral sliding of slope due to liquefaction of sand layer - Discussion. JOURNAL OF GEOTECHNICAL AND GEOENVIRONMENTAL ENGINEERING, 123(1), 80-82.American Society of Civil Engineers (ASCE). doi: 10.1061/(ASCE)1090-0241(1997)123:1(80).

Vallejo, L.E. (1997). Fractals in engineering geology - Preface. ENGINEERING GEOLOGY, 48(3-4), 159-160.Elsevier BV. doi: 10.1016/S0013-7952(97)00037-9.

Vallejo, L.E., & Shettima, M. (1997). Chapter 4 Fault movement and its impact on ground deformations and engineering structures. Developments in Geotechnical Engineering, 81(C), 43-60.Elsevier. doi: 10.1016/s0165-1250(97)80005-3.

Boward, J.F., & Vallejo, L.E. (1996). Clay liner crack propagation. Geotechnical Special Publication, (59), 97-113.

Vallejo, L.E. (1996). Fractal analysis of the fabric changes in a consolidating clay. ENGINEERING GEOLOGY, 43(4), 281-290.Elsevier BV. doi: 10.1016/S0013-7952(96)00038-5.

Vallejo, L.E. (1996). Evaluating the variability of engineering properties of soil deposits using fractals. Geotechnical Special Publication, (58 I), 353-367.

Vallejo, L.E., & Shettima, M. (1996). Fault movement and its impact on ground deformations and engineering structures. Engineering Geology, 43(2/3), 113-129.

Vallejo, L.E., & Shettima, M. (1996). Fault movement and its impact on ground deformations and engineering structures. ENGINEERING GEOLOGY, 43(2-3), 119-133.Elsevier BV. doi: 10.1016/0013-7952(96)00055-5.

Vallejo, L.E., & Zhou, Y. (1996). Interaction between geomembranes and granular materials. Geotechnical Special Publication, (59), 82-96.

Zhou, Y., Vallejo, L.E., & Hsu, D.C. (1996). Analysis and design of liner system for a large ash residual landfill. Geotechnical Special Publication, (59), 114-129.

Stump, D.E., Vallejo, L.E., & Bazan-Arias, N.C. (1995). Analysis of the creeping behavior of a natural slope in Kentucky. Geotechnical Special Publication, (52), 21-36.

Vallejo, L.E. (1995). Fractal analysis of granular materials. GEOTECHNIQUE, 45(1), 159-163.Thomas Telford Ltd. doi: 10.1680/geot.1995.45.1.159.

Vallejo, L.E., & Yoo, H. (1995). Reinforcement of fissured clays by short steel fibers. Transportation Research Record, (1474), 108-115.

Vallejo, L.E., & Zhou, Y. (1995). The relationship between the fractal dimension and Krumbein's roundness number. Soils and Foundations, 35(1), 163-167.

VALLEJO, L.E., & ZHOU, Y. (1995). FRACTAL APPROACH TO MEASURING ROUGHNESS OF GEOMEMBRANES. JOURNAL OF GEOTECHNICAL ENGINEERING-ASCE, 121(5), 442-446.American Society of Civil Engineers (ASCE). doi: 10.1061/(ASCE)0733-9410(1995)121:5(442).

Neufeld, R.D., Vallejo, L.E., Hu, W., Latona, M., Carson, C., & Kelly, C. (1994). Properties of fly ash content cellular concrete. Journal of Energy Engineering,, 120(1), 35-48.

NEUFELD, R.D., VALLEJO, L.E., HU, W.Y., LATONA, M., CARSON, C., & KELLY, C. (1994). PROPERTIES OF HIGH FLY-ASH CONTENT CELLULAR CONCRETE. JOURNAL OF ENERGY ENGINEERING-ASCE, 120(1), 35-48.American Society of Civil Engineers (ASCE). doi: 10.1061/(ASCE)0733-9402(1994)120:1(35).

Vallejo, L.E. (1994). Application of fracture mechanics to soils: An overview. Geotechnical Special Publication, (43), 1-20.

VALLEJO, L.E. (1994). FRACTAL ANALYSIS OF THE SLAKE DURABILITY TEST. CANADIAN GEOTECHNICAL JOURNAL, 31(6), 1003-1008.Canadian Science Publishing. doi: 10.1139/t94-114.

Vallejo, L.E., & Zhou, Y. (1994). Discussion of: Effect of gravel on hydraulic conductivity of compacted soil liners. Journal of Geotechnical Engineering, ASCE, 120(5), 935-937.

VALLEJO, L.E., & ZHOU, Y. (1994). EFFECT OF GRAVEL ON HYDRAULIC CONDUCTIVITY OF COMPACTED SOIL LINERS - DISCUSSION. JOURNAL OF GEOTECHNICAL ENGINEERING-ASCE, 120(5), 935-937.American Society of Civil Engineers (ASCE). doi: 10.1061/(ASCE)0733-9410(1994)120:5(935).

Vallejo, L.E., Robinson, M.K., & Stewart-Murphy, A.C. (1994). Role of shale pores in settlement. Geotechnical Special Publication, 2(40), 1425-1434.

Vallejo, L.E. (1993). Shear stress and the hydraulic fracturing of earth dam soils. Soils and Foundations, 33(3), 14-27.

Vallejo, L.E., Welsh, R.A., Lovell, C.W., & Robinson, M.K. (1993). Influence of fabric and composition on the durability of Appalachian shales. ASTM Special Technical Publication, (1177), 15-28.

Vallejo, L.E. (1991). Closure to discussion of: Fissure parameters in stiff clays under compression. Journal of Geotechnical Engineering, ASCE, 117(5), 848-849.

VALLEJO, L.E. (1991). FISSURE PARAMETERS IN STIFF CLAYS UNDER COMPRESSION - CLOSURE. JOURNAL OF GEOTECHNICAL ENGINEERING-ASCE, 117(5), 848-849.American Society of Civil Engineers (ASCE). doi: 10.1061/(ASCE)0733-9410(1991)117:5(848.2).

Welsh, R.A., Vallejo, L.E., Lovell, C.W., & Robinson, M.K. (1991). U.S. Office of Surface Mining (OSM) proposed strength-durability classification system. Geotechnical Special Publication, (28), 125-140.

Vallejo, L.E. (1989). An Extension of the Particulate Model of Stability Analysis for Mudflows. Soils and Foundations, 29(3), 1-13.Elsevier BV. doi: 10.3208/sandf1972.29.3_1.

Vallejo, L.E. (1989). Discussion of: Lateral loads on offshore structures exerted by submarine mudflows. Soils and Foundations, 29(3), 169-171.

VALLEJO, L.E. (1989). FISSURE PARAMETERS IN STIFF CLAYS UNDER COMPRESSION. JOURNAL OF GEOTECHNICAL ENGINEERING-ASCE, 115(9), 1303-1317.American Society of Civil Engineers (ASCE). doi: 10.1061/(ASCE)0733-9410(1989)115:9(1303).

Vallejo, L.E. (1988). Liquefaction of sand lenses during an earthquake. Geotechnical Special Publication, (n), 493-507.

VALLEJO, L.E. (1988). EVALUATION OF TEST METHODS DESIGNED TO OBTAIN THE UNDRAINED SHEAR-STRENGTH OF MUDS. MARINE GEOTECHNOLOGY, 7(3), 173-188.Informa UK Limited. doi: 10.1080/10641198809388215.

VALLEJO, L.E. (1988). THE BRITTLE AND DUCTILE BEHAVIOR OF CLAY SAMPLES CONTAINING A CRACK UNDER MIXED-MODE LOADING. THEORETICAL AND APPLIED FRACTURE MECHANICS, 10(1), 73-78.Elsevier BV. doi: 10.1016/0167-8442(88)90058-4.

VALLEJO, L.E., & DEGROOT, R. (1988). BLUFF RESPONSE TO WAVE ACTION. ENGINEERING GEOLOGY, 26(1), 1-16.Elsevier BV. doi: 10.1016/0013-7952(88)90003-8.

VALLEJO, L.E. (1987). THE INFLUENCE OF FISSURES IN A STIFF CLAY SUBJECTED TO DIRECT SHEAR. GEOTECHNIQUE, 37(1), 69-82.Thomas Telford Ltd. doi: 10.1680/geot.1987.37.1.69.

Vallejo, L.E. (1986). MECHANICS OF CRACK PROPAGATION IN STIFF CLAYS. 14-27.

Vallejo, L.E. (1986). MUDSLIDE PROFILE METHOD TO MEASURE THE UNDRAINED SHEAR STRENGTH OF MUDS. 1094-1107.

Vallejo, L.E. (1985). Fissure interaction and progressive failure of slopes. Proc. 11th international conference on soil mechanics and foundation engineering, San Francisco, August 1985. Vol. 4, (Balkema), 2353-2356.

Baladi, G.Y., Vallejo, L.E., & Goitom, T. (1983). NORMALIZED CHARACTERIZATION MODEL OF PAVEMENT MATERIALS. ASTM Special Technical Publication, 55-64.

MORRIS, R.N. (1982). AN EXPLANATION FOR MUDFLOWS. GEOTECHNIQUE, 32(1), 67-68.Thomas Telford Ltd. doi: 10.1680/geot.1982.32.1.67.

Vallejo, L.E. (1982). Evaluation of test methods designed to obtain the undrained shear strength of muds. IN: PROC. FOURTEENTH ANNUAL OFFSHORE TECHNOL. CONF., (HOUSTON, U.S.A.: MAY 3-6, 1982), 3 , Dallas, U.S.A., Offshore Technol. Conf., 1982, Paper OTC 4302, 11-20.

Vallejo, L.E. (1982). Development of a shear zone structure in stiff clays. Numerical methods in geomechanics. Proc. 4th international conference, Edmonton, 1982. Volume 1, 255-262.

Vallejo, L.E. (1981). STABILITY ANALYSIS OF MUDFLOWS ON NATURAL SLOPES. Proceedings of the International Conference on Soil Mechanics and Foundation Engineering, 3, 541-544.

Vallejo, L.E. (1981). Stability analysis of mudflows on natural slopes. Soil mechanics and foundation engineering. Proc. 10th international conference, Stockholm, June 1981. Vol. 3, (A.A.Balkema), 541-544.

Vallejo, L.E., & Edil, T.B. (1981). STABILITY OF THAWING SLOPES: FIELD AND THEORETICAL INVESTIGATIONS. Proceedings of the International Conference on Soil Mechanics and Foundation Engineering, 3, 545-548.

Vallejo, L.E., & Edil, T.B. (1981). Stability of thawing slopes: field and theoretical investigations. Soil mechanics and foundation engineering. Proc. 10th international conference, Stockholm, June 1981. Vol. 3, (A.A.Balkema), 545-548.

EDIL, T.B., & VALLEJO, L.E. (1980). MECHANICS OF COASTAL LANDSLIDES AND THE INFLUENCE OF SLOPE PARAMETERS. ENGINEERING GEOLOGY, 16(1-2), 83-96.Elsevier BV. doi: 10.1016/0013-7952(80)90009-5.

Vallejo, L.E. (1980). Discussion of: Cliff collapse and rock avalanches in the Mackenzie Mountains, northwestern Canada. Canadian Geotechnical Journal, 17(1), 149-152.

VALLEJO, L.E. (1980). MECHANICS OF MUDFLOW MOBILIZATION IN LOW-ANGLED CLAY SLOPES. ENGINEERING GEOLOGY, 16(1-2), 63-70.Elsevier BV. doi: 10.1016/0013-7952(80)90007-1.

VALLEJO, L.E. (1980). A NEW APPROACH TO THE STABILITY ANALYSIS OF THAWING SLOPES. CANADIAN GEOTECHNICAL JOURNAL, 17(4), 607-612.Canadian Science Publishing. doi: 10.1139/t80-068.

VALLEJO, L.E. (1979). EXPLANATION FOR MUDFLOWS. GEOTECHNIQUE, 29(3), 351-354.Thomas Telford Ltd. doi: 10.1680/geot.1979.29.3.351.

VALLEJO, L.E., & EDIL, T.B. (1979). DESIGN CHARTS FOR DEVELOPMENT AND STABILITY OF EVOLVING SLOPES. JOURNAL OF CIVIL ENGINEERING DESIGN, 1(3), 231-252.

Edil, T.B., & Vallejo, L.E. (1978). SHORELINE EROSION AND LANDSLIDES IN THE GREAT LAKES. v(2), 51-57.

Vallejo, L.E. (1978). Discussion of: A limit equilibrium analysis of progressive failure in the stability of slopes. Canadian Geotechnical Journal, 15(4), 617-618.

Adelsohn, E., Li, M., Vallejo, L., Winn, R., Iannacchione, A., & Painter, R. (2021). The Reaction of Embankment to Longwall Mining Subsidence. In IFCEE 2021, 2021-May(GSP 326), (pp. 42-54).American Society of Civil Engineers. doi: 10.1061/9780784483435.005.

Vallejo, L.E. (2019). An investigation into the seismic stability of walls with and without base isolation built by the inkas. In Earthquake Geotechnical Engineering for Protection and Development of Environment and Constructions- Proceedings of the 7th International Conference on Earthquake Geotechnical Engineering, 2019, (pp. 5442-5449).

Vallejo, L.E., & Qin, X. (2019). A fem study of the fluid injection-induced earthquakes caused by the seepage-induced propagation and interaction of fissures. In Earthquake Geotechnical Engineering for Protection and Development of Environment and Constructions- Proceedings of the 7th International Conference on Earthquake Geotechnical Engineering, 2019, (pp. 5450-5456).

Vallejo, L.E., & Scovazzo, V. (2019). The Propagation Mechanics of Liquefied Sand Lenses Due to Cyclic Loading. In Geo-Congress 2019, 2019-March(GSP 308), (pp. 332-340).American Society of Civil Engineers. doi: 10.1061/9780784482100.034.

Vallejo, L.F., & Shettima, M. (2019). Fatigue Crack Propagation in Stiff Clays Forming Part of Earth Dams and Natural Slopes. In Geo-Congress 2019, 2019-March(GSP 310), (pp. 610-617).American Society of Civil Engineers. doi: 10.1061/9780784482124.062.

Espitia, J.M., Caicedo, B., & Vallejo, L. (2018). Effect of Suction on the Poisson’s Ratio of Claystones. In PanAm Unsaturated Soils 2017, 2017-November(GSP 303), (pp. 38-46).American Society of Civil Engineers. doi: 10.1061/9780784481707.005.

Caicedo, B., Espitia, J.M., & Vallejo, L. (2017). Hydro-mechanical Behaviour of Unsaturated Argillaceous Rocks. In Springer Series in Geomechanics and Geoengineering, (pp. 3-13).Springer International Publishing. doi: 10.1007/978-3-319-52773-4_1.

Castro, J., Vallejo, L.E., & Estrada, N. (2017). Mechanical analysis of the dry stone walls built by the Incas. In EPJ Web of Conferences, 140, (p. 06012).EDP Sciences. doi: 10.1051/epjconf/201714006012.

Lai, Z., Vallejo, L.E., & Zhou, W. (2017). The lateral force in a sedimentary layer under gravity using DEM. In 51st US Rock Mechanics / Geomechanics Symposium 2017, 5, (pp. 3235-3242).

Vallejo, L.E. (2017). Analysis of the Fabric Changes in a Simulated Clay-Rock Mixture under Shear. In Geotechnical Frontiers 2017, 0(GSP 280), (pp. 589-594).American Society of Civil Engineers. doi: 10.1061/9780784480472.062.

Vallejo, L.E., & Shettima, M. (2017). An Explanation for the Delayed Failures of Natural Slopes and Earth Dams. In Geotechnical Frontiers 2017, 0(GSP 278), (pp. 372-381).American Society of Civil Engineers. doi: 10.1061/9780784480458.037.

Vallejo, L.E., Chik, Z., & Lobo-Guerrero, S. (2017). The Effect of Crushing of Unbound Granular Materials Forming Part of Flexible Pavement Systems. In Geotechnical Frontiers 2017, 0(GSP 277), (pp. 424-431).American Society of Civil Engineers. doi: 10.1061/9780784480441.044.

Vallejo, L.E., Espitia, J.M., & Caicedo, B. (2017). Fractal Analysis of the Progressive Failure of Shales and Stiff Clays Under Shear. In Springer Series in Geomechanics and Geoengineering, (pp. 257-263).Springer International Publishing. doi: 10.1007/978-3-319-52773-4_29.

Vallejo, L.E., Espitia, J.M., & Caicedo, B. (2017). The influence of the fractal particle size distribution on the mobility of dry granular materials. In EPJ Web of Conferences, 140, (p. 03032).EDP Sciences. doi: 10.1051/epjconf/201714003032.

Espitia, J.M., Caicedo, B., & Vallejo, L. (2016). Experimental study of the hydro-mechanical behaviour of unsaturated argillaceous rocks. In E3S Web of Conferences, 9, (p. 14007).EDP Sciences. doi: 10.1051/e3sconf/20160914007.

Vallejo, L.E. (2016). Fractal Evaluation of the Evolution of the Void System in a Simulated Granular Material under Direct Shear. In Geotechnical and Structural Engineering Congress 2016, (pp. 560-568).American Society of Civil Engineers. doi: 10.1061/9780784479742.046.

Vallejo, L.E. (2016). Fractal Analysis of the Cracking and Failure of Asphalt Pavements. In Geotechnical and Structural Engineering Congress 2016, (pp. 1176-1185).American Society of Civil Engineers. doi: 10.1061/9780784479742.098.

Vallejo, L.E. (2016). Fractal Analysis of Crack Evolution in Desiccating Clay and Some Engineering Applications. In Geotechnical and Structural Engineering Congress 2016, (pp. 551-559).American Society of Civil Engineers. doi: 10.1061/9780784479742.045.

Vallejo, L.E., & Shettima, M. (2016). Vertical Ground Deformations Induced by the Mobilization of a Strike-Slip Fault Segment and Their Effects on Engineering Structures. In Geotechnical and Structural Engineering Congress 2016, (pp. 1495-1503).American Society of Civil Engineers. doi: 10.1061/9780784479742.125.

Vallejo, L.E. (2015). The influence of open and closed toe notches on the stability of rock and soil slopes. In ISRM Regional Symposium - 8th South American Congress on Rock Mechanics, SACRM 2015, 2015-November, (pp. 295-302). doi: 10.3233/978-1-61499-605-7-295.

Vallejo, L.E., Fontanese, M., & Estrada, N. (2015). Analysis of the design and stability of the retaining walls built by the incas. In ISRM Regional Symposium - 8th South American Congress on Rock Mechanics, SACRM 2015, 2015-November, (pp. 287-294). doi: 10.3233/978-1-61499-605-7-287.

Caicedo, B., Ocampo, M., & Vallejo, L. (2014). Modelling crushing of granular materials using Markovian processes. In Geomechanics from Micro to Macro - Proceedings of the TC105 ISSMGE International Symposium on Geomechanics from Micro to Macro, IS-Cambridge 2014, 2, (pp. 989-994).CRC Press. doi: 10.1201/b17395-177.

Kutschke, W.G., & Vallejo, L.E. (2014). Influence of Lateral Stress Release on the Stability of Stiff Clay Slopes. In Geo-Congress 2014 Technical Papers, (234 GSP), (pp. 212-221).American Society of Civil Engineers. doi: 10.1061/9780784413272.022.

Lozada, C., Caicedo, B., & Vallejo, L. (2014). Physical modeling of clay mixtures with large particles. In Physical Modelling in Geotechnics - Proceedings of the 8th International Conference on Physical Modelling in Geotechnics 2014, ICPMG 2014, 2, (pp. 1251-1257).CRC Press. doi: 10.1201/b16200-180.

Ocampo, M.S., Caicedo, B., & Vallejo, L.E. (2014). Multi-scale modelling. In Geomechanics from Micro to Macro - Proceedings of the TC105 ISSMGE International Symposium on Geomechanics from Micro to Macro, IS-Cambridge 2014, 1, (pp. 764-825).CRC Press. doi: 10.1201/b17395-52.

Vallejo, L.E., & Fontanese, M. (2014). Stability and Sustainability Analyses of the Retaining Walls Built by the Incas. In Geo-Congress 2014 Technical Papers, (234 GSP), (pp. 3789-3798).American Society of Civil Engineers. doi: 10.1061/9780784413272.367.

Vallejo, L.E., & Sbarro, C. (2014). Visualization of the Fragmentation of a Weak Granular Material under Uniaxial Confined Compression. In Geo-Congress 2014 Technical Papers, (234 GSP), (pp. 741-750).American Society of Civil Engineers. doi: 10.1061/9780784413272.072.

Vallejo, L.E., & Shamrock, J. (2014). Fracture Mechanics Evaluation of Parameters Associated with Horizontal Hydrofracturing. In Shale Energy Engineering 2014, (pp. 191-200).American Society of Civil Engineers. doi: 10.1061/9780784413654.020.

Vallejo, L.E., Lobo-Guerrero, S., & Seminsky, L.F. (2014). Shear Strength of Sand-Gravel Mixtures: Laboratory and Theoretical Analysis. In Geo-Congress 2014 Technical Papers, (234 GSP), (pp. 74-83).American Society of Civil Engineers. doi: 10.1061/9780784413272.008.

Vallejo, L.E., Lobo-Guerrero, S., Sbarro, C., Liu, Z., & Valdes, J.R. (2014). The constitutive model for unsaturated sands based on thermodynamics. In Geomechanics from Micro to Macro - Proceedings of the TC105 ISSMGE International Symposium on Geomechanics from Micro to Macro, IS-Cambridge 2014, 1, (pp. 728-733).CRC Press. doi: 10.1201/b17395-46.

Wang, Z., & Vallejo, L.E. (2014). A new method for establishing elastic-viscoplastic constitutive model of clay. In Geomechanics from Micro to Macro - Proceedings of the TC105 ISSMGE International Symposium on Geomechanics from Micro to Macro, IS-Cambridge 2014, 1, (pp. 718-723).CRC Press. doi: 10.1201/b17395-44.

Caicedo, B., Ocampo, M., & Vallejo, L. (2013). Modelling crushing of granular materials as a poly-disperse mixture. In 18th International Conference on Soil Mechanics and Geotechnical Engineering: Challenges and Innovations in Geotechnics, ICSMGE 2013, 2, (pp. 1003-1006).

Kutschke, W.G., & Vallejo, L.E. (2013). A New Stability Number for Vertical Cuts in Stiff Clays. In Geo-Congress 2013, (231 GSP), (pp. 1270-1279).American Society of Civil Engineers. doi: 10.1061/9780784412787.128.

Vallejo, L.E. (2013). Crack propagation and threshold strength of fissured clays subjected to cyclic loading. In Advances in Unsaturated Soils - Proceedings of the 1st Pan-American Conference on Unsaturated Soils, PanAmUNSAT 2013, (pp. 415-422).CRC Press. doi: 10.1201/b14393-58.

Vallejo, L.E. (2013). Critical combination of tensile and shear stresses causing the crack propagation path in brittle clays subjected to uniaxial compression. In Advances in Unsaturated Soils - Proceedings of the 1st Pan-American Conference on Unsaturated Soils, PanAmUNSAT 2013, (pp. 407-414).CRC Press. doi: 10.1201/b14393-57.

Vallejo, L.E. (2013). Capillary rise in pores with rough walls. In Advances in Unsaturated Soils - Proceedings of the 1st Pan-American Conference on Unsaturated Soils, PanAmUNSAT 2013, (pp. 289-296).CRC Press. doi: 10.1201/b14393-38.

Vallejo, L.E., & Kutschke, W.G. (2013). Fragmentation due to Desiccation and Shallow Failures in Clay Slopes. In Geo-Congress 2013, (231 GSP), (pp. 772-781).American Society of Civil Engineers. doi: 10.1061/9780784412787.077.

Vallejo, L.E., Lobo-Guerrero, S., Seminsky, L.F., & Caicedo, B. (2013). The reinforcement of soils by dispersed oversized particles. In 18th International Conference on Soil Mechanics and Geotechnical Engineering: Challenges and Innovations in Geotechnics, ICSMGE 2013, 3, (pp. 2617-2620).

Vesga, L.F., & Vallejo, L.E. (2013). Constitutive modelling and microstructure Hydro-mechanical formulation considering fluid compressibility. In Advances in Unsaturated Soils - Proceedings of the 1st Pan-American Conference on Unsaturated Soils, PanAmUNSAT 2013, (pp. 423-428).CRC Press. doi: 10.1201/b14393-59.

Vesga, L.F., & Vallejo, L.E. (2013). Volumetric behavior of unsaturated-reconstituted soils. In Advances in Unsaturated Soils - Proceedings of the 1st Pan-American Conference on Unsaturated Soils, PanAmUNSAT 2013, (pp. 429-434).CRC Press. doi: 10.1201/b14393-60.

Kutschke, W.G., & Vallejo, L.E. (2012). A finite element analysis of the propagation of a toe crack in a vertical slope. In Landslides and Engineered Slopes: Protecting Society through Improved Understanding - Proceedings of the 11th International and 2nd North American Symposium on Landslides and Engineered Slopes, 2012, 2, (pp. 1807-1812).

Vallejo, L.E. (2012). The influence of notches on the stability of soil and rock slopes. In Landslides and Engineered Slopes: Protecting Society through Improved Understanding - Proceedings of the 11th International and 2nd North American Symposium on Landslides and Engineered Slopes, 2012, (pp. 415-419).

Vallejo, L.E., & Liu, Z. (2012). The angle of repose of granular systems measured using hollow cylinders. In Landslides and Engineered Slopes: Protecting Society through Improved Understanding - Proceedings of the 11th International and 2nd North American Symposium on Landslides and Engineered Slopes, 2012, (pp. 937-942).

Vallejo, L.E. (2011). Compressive strength of unsaturated fissured clays. In Unsaturated Soils - Proceedings of the 5th International Conference on Unsaturated Soils, 1, (pp. 387-390).

Vallejo, L.E., & Stewart-Murphy, A. (2011). Pore geometry induced suction and the slaking of shales. In Unsaturated Soils - Proceedings of the 5th International Conference on Unsaturated Soils, 2, (pp. 1477-1482).

Gutiérrez, J.J., Vallejo, L.E., Lin, J.S., & Painter, R. (2010). Impact of longwall mining on highways. In 44th US Rock Mechanics Symposium - 5th US/Canada Rock Mechanics Symposium.

Gutiérrez, J.J., Vallejo, L.E., Lin, J.S., & Painter, R. (2010). Impact of longwall mining of coal on highways in southwestern Pennsylvania. In IAHS-AISH Publication, 339, (pp. 120-125).

Gutiérrez, J.J., Vallejo, L.E., & García, C.I. (2009). The hydraulic conductivity of sands with dispersed oversized particles. In Proceedings of the 17th International Conference on Soil Mechanics and Geotechnical Engineering: The Academia and Practice of Geotechnical Engineering, 1, (pp. 163-166). doi: 10.3233/978-1-60750-031-5-163.

Vallejo, L.E. (2009). The influence of isolated fissures on the hydraulic conductivity of clays. In Poromechanics IV - 4th Biot Conference on Poromechanics, (pp. 977-982).

Vallejo, L.E., Lobo-Guerrero, S., Nakagawa, M., & Luding, S. (2009). Fractal Fragmentation of Granular Materials under Compression. In AIP Conference Proceedings, 1145, (pp. 847-850).AIP. doi: 10.1063/1.3180061.

Vallejo, L.E. (2008). The Formation and Effect of Wave Induced Notches on the Failure of Coastal Slopes. In Solutions to Coastal Disasters 2008, 312, (pp. 584-595).American Society of Civil Engineers. doi: 10.1061/40968(312)53.

Estrada, N., Caicedo, B., Silva, J.A., Taboada, A., & Vallejo, L. (2006). Numerical and physical modeling of granular flow. In Proceedings of the 6th International Conference on Physical Modelling in Geotechnics - Physical Modelling in Geotechnics - 6th ICPMG '06, 2, (pp. 1401-1405).

Estrada, N., Caicedo, B., Silva, J.A., Taboada, A., & Vallejo, L. (2006). Numerical and physical modeling of granular flow. In Proceedings of the 6th International Conference on Physical Modelling in Geotechnics - Physical Modelling in Geotechnics - 6th ICPMG '06, 2, (pp. 1401-1405).

Lobo-Guerrero, S., & Vallejo, L.E. (2006). The degradation of a simulated ballast bed and the effectiveness of track maintenance techniques. In Proceedings of the 41st U.S. Rock Mechanics Symposium - ARMA's Golden Rocks 2006 - 50 Years of Rock Mechanics, (p. 12 pages).

Lobo-Guerrero, S., & Vallejo, L.E. (2006). DEM as an Educational Tool in Geotechnical Engineering. In GeoCongress 2006, 2006, (p. 269).American Society of Civil Engineers. doi: 10.1061/40803(187)269.

Lobo-Guerrero, S., & Vallejo, L.E. (2006). Influence of Pile Shape on the Crushable Behavior of Granular Materials around Driven Piles: DEM Analysis. In GeoCongress 2006, 2006, (p. 170).American Society of Civil Engineers. doi: 10.1061/40803(187)170.

Vesga, L.F., & Vallejo, L.E. (2006). Direct and Indirect Tensile Tests for Measuring the Equivalent Effective Stress in a Kaolinite Clay. In Unsaturated Soils 2006, (147), (pp. 1290-1301).American Society of Civil Engineers. doi: 10.1061/40802(189)106.

Vallejo, L.E., & Chik, Z. (2005). The evolution of crushing in granular materials and its effect on their mechanical properties. In Proceedings of the 16th International Conference on Soil Mechanics and Geotechnical Engineering: Geotechnology in Harmony with the Global Environment, 3, (pp. 1793-1796).

Vallejo, L.E., & Lobo-Guerrero, S. (2005). Evaluation of porosity changes in a granular material undergoing particle crushing using DEM. In Poromechanics III: Biot Centennial (1905-2005) - Proceedings of the 3rd Biot Conference on Poromechanics, (pp. 573-578).Balkema Press.

Vesga, L.F., & Vallejo, L.E. (2005). Strength of an unsaturated kaolinite clay under suction pressures. In Proceedings of the 16th International Conference on Soil Mechanics and Geotechnical Engineering: Geotechnology in Harmony with the Global Environment, 2, (pp. 611-614).

Vallejo, L.E. (2002). Modes of Failure of Coastal Slopes as a Result of Wave Action. In Solutions to Coastal Disasters '02, (pp. 664-672).American Society of Civil Engineers. doi: 10.1061/40605(258)58.

Vallejo, L.E., & Stewart-Murphy, A. (2001). Influence of pore wall roughness on the slaking of shales. In DC Rocks 2001 - 38th U.S. Symposium on Rock Mechanics (USRMS), (pp. 93-98).

Iannacchione, A.T., & Vallejo, L.E. (2000). Shear Strength Evaluation of Clay-Rock Mixtures. Geo-Denver 2000.Denver, CO. doi: 10.1061/40512(289)16.

Latona, M.C., Neufeld, R.D., Vallejo, L.E., Hu, W., & Kelly, C. (1996). Environmental impacts of autoclaved cellular concrete. In Geotechnical Special Publication, (59), (pp. 57-69).

Iannacchione, A.T., & Vallejo, L.E. (1995). Factors affecting the slope stability of Kentucky's abandoned mine lands. In 35th U.S. Symposium on Rock Mechanics, USRMS 1995, (pp. 837-842).

Vallejo, L.E., & Zhou, Y. (1995). Fractal dimension of granular materials and their engineering properties. In Proceedings of Engineering Mechanics, 1, (pp. 469-472).

Iannacchione, A.T., & Vallejo, L.E. (1991). Stress and behavior of material under direct shear. In 32nd U.S. Symposium on Rock Mechanics, USRMS 1991, (pp. 549-558).

Vallejo, L.E., & Yoo, H. (1990). Bearing capacity of debris flows. In Hydraulics/Hydrology of Arid Lands, (pp. 232-237).

Vallejo, L.E., Welsh, R.A., & Robinson, M.K. (1989). Correlation between unconfined compressive and point load strengths for appalachian rocks. In 30th U.S. Symposium on Rock Mechanics, USRMS 1989, (pp. 461-468).

Vallejo, L.E. (1987). The brittle and ductile behavior of a material containing a crack under mixed-mode loading. In 28th U.S. Symposium on Rock Mechanics, USRMS 1987, (pp. 383-390).

Vallejo, L.E., & Pramono, E. (1984). DEVELOPMENT OF FRACTURE REGIONS IN BRITTLE MATERIALS. In Proceedings - Symposium on Rock Mechanics, (pp. 47-54).

Vallejo, L.E., & Tarvin, P.A. (1983). NEW METHOD TO DETERMINE THE UNDRAINED SHEAR STRENGTH OF MUDS BASED ON PLASTICITY THEORY. In Behaviour of Off-Shore Structures, Proceedings of the International Conference, 2, (pp. 465-473).

Vallejo, L.E. (1982). EFFECT OF FREEZE-THAW CYCLES ON THE STRUCTURE AND THE STABILITY OF SOIL SLOPES. In CRREL Special Report (US Army Cold Regions Research and Engineering Laboratory), (pp. 455-461).

Vallejo, L.E. (1982). DEVELOPMENT OF A SHEAR ZONE STRUCTURE IN STIFF CLAYS. (pp. 255-262).

Vallejo, L.E. (1982). Evaluation of Test Methods Designed To Obtain The Undrained Shear Strength of Muds. In Offshore Technology Conference, 1982-May, (pp. 11-16).Offshore Technology Conference. doi: 10.4043/4302-ms.

Edil, T.B., & Vallejo, L.E. (1976). Shoreline erosion and landslides in the Great Lakes. (pp. Vol. 2, pp. 51-57).

Research interests

Application of Fracture Mechanics...
cracking of soils
interface shear strength between...
mechanical properties of cellular...
mechanics of crushing of granular...
mechanics of sand liquefaction
mechanics of slaking of shales
mobilization mechanics of mudflows...
shear strength of soils
Stability and evolution mechanics...
subsidence due to long wall mining