ABSTRACT: Room temperature drying tests on silt slurry with free and constrained boundaries, reveal an initial phase with a significant shrinkage at full saturation. Hence, this shrinkage is linked to a mass loss of pore fluid through the external boundary. Shrinkage in the unsaturated phase is much smaller. A simultaneous porosimetry reveals a bi-modal pore size distribution with a distinct ev...

A novel approach of simulating hydromechanical coupling in pore-scale models of porous media is presented in this paper. Parameters of the sandstone samples, such as the stress-strain curve, Poisson's ratio, and permeability under different pore pressure and confining pressure, are tested in laboratory scale. The micro-CT scanner is employed to scan the samples for three-dimensional images, as ...

in saturated soils, heating induces thermal expansion of both grains and the pore fluid. lower thermal expansion coefficient of aggregates results in the increase of pore pressure and reduction of the effective stress besides subsequent volume changes due to the dissipation of pore pressure and heat transfer. dissipation of thermally induced pore pressure with time is a coupled thermo-hydro-mec...

Seismic liquefaction affects badly the safety of underground structures. For dynamic responses tunnel in liquefied watered sandy stratum one rail transit projects Shanghai, this paper proposes a tunnel-foundation shaking table model test and analyses electrolytic desaturation technology on surrounding soil, which provides some theoretical guidance for seismic designs Shanghai projects. The resu...

In order to study the bearing characteristic of geosynthetic-encased stone column (GESC) on composite foundation, a series field tests and numerical simulation were carried out foundations reinforced by traditional GESC. The pile–soil stress ratio, excess pore water pressure lateral displacement two kinds monitored. effects geotextile stiffness, wrapping length gravel internal friction angle fo...

Abstract The influence of stress anisotropy ( K ) (i.e. the ratio between effective horizontal and vertical stresses) on shear behaviour soils has received significant attention in past studies, but how its depends different values plasticity index (PI) not been properly quantified. In this study, results a series undrained triaxial tests anisotropically consolidated soil at are reported , toge...

This study examines the effect of groundwater level ( ) on seismic site response behavior a one-layered liquefiable soil using one-dimensional nonlinear numerical analyses. The was analyzed with help DeepSoil open-source software. calibration model carried out results centrifuge experiment from literature. outcomes analyses were discussed in terms peak horizontal acceleration, amplification rat...

offshore pipelines used for oil and gas transportation are often buried to avoid damage from fishing activities and to provide thermal insulation. thermal expansion and contraction of the pipeline during operation can lead to lateral or upheaval buckling. a safe buried pipeline design must take into account a reliable evaluation of soil uplift resistance and pipe embedment depth. while the cost...