Earthquakes have caused significant damage to civil engineering structures worldwide due inadequate lateral load capacity and excessive deformation of pile foundations supporting these structures. The seismic performance interacting with unsaturated soils could be affected by changes in matric suction the moisture content variation induced seasonal weather or water table fluctuations. Hence, ma...

Computer models to simulate pesticide transport in the unsaturated zone will be an important management tool in coming years. However, not many efforts were directed to validate the usefulness of such models. In this study, the simulation models GLEAMS, PRZM, and LEACHM were validated. The three models use different mathematical concepts to compute one-dimensional flow and transport in a homoge...

classical soil mechanics involves the study of fully saturated soils. however, many problems encountered in geotechnical engineering practice involve unsaturated soil, in which behavior is significantly different from classical saturated soil. negative pore pressure and capillary forces develop a virtual cohesion between the grains of semi saturated soils. this kind of cohesion is dependent on ...

ior of u nical e tive st havior for soils under unsaturated conditions, the characterization of and then derived the loading-collapse yield curve, which Article history: Received 27 July 2013 Received in revised form 8 March 2014 Accepted 9 March 2014 Available online 29 March 2014

The paper describes first the theoretical framework of a “single layer” three phase material. The formulation is general and particular cases are dry and fully saturated soils. The formulation and discretization of the motion and balance equations is presented. Two constitutive equations are used in the applications described: A brittle model for saturated soils and a Mohr-Coulomb elastoplastic...