Guidelines for seismic spectral amplification are provided in current building codes based on soil strength/stiffness by means of seismic site class. However, current codes do not make a difference between fully saturated and unsaturated soil deposits and do not account for effects of soil heterogeneity on seismic amplification. This study investigates the effect of natural small scale soil het...

An Incompletely End Supported Pile (IESP) is a pile in soft soil layer underlain by hard that does not reach the bottom practice. This study estimates end bearing capacity of IESP using an inhouse Rigid Plastic FEM code (RPFEM), considering shear strength non-linearity against confining pressure, and soil-foundation interaction. The effect distance between tip (d/B) on end-bearing was mainly in...

Abstract—A number of studies have been conducted recently to investigate the influence of randomly oriented fibers on some engineering properties of cohesive and cohesionless soils. However, few studies have been carried out on freezing-thawing behavior of fine-grained soils modified with discrete fiber inclusions and additive materials. This experimental study was performed to investigate the ...

Recent studies have shown that unsaturated soils lead to greater lateral pile capacity. This study aims experimentally assess how suction stress affects the response of piles in cohesionless soil. Two centrifuge tests were performed at 50 g evaluate effect Lateral loads applied monotonically on a single free-head displacement-controlledmanner maximum head displacement 0.44 m. The first test was...

Soils at the ground surface experience multiple cycles of drying and wetting. On drying, soils shrinkage cracks may appear. The development depends on tensile strength soil. Such increase permeability soil can cause slopes earth structures to fail due rainfall. Several models have been proposed for unsaturated considering effect matric suction. However, are either cohesionless (coarse-grained) ...

Shallow slides in cohesionless till occurred in several highway fills in the province of Quebec, Canada, following spring thaw and sometimes during rainy autumns. This study has shown that the strength parameters of cohesionless tills can be related to the liquid limit for both drained and undrained conditions. These relationships can be used as input in stability analyses to readily yield desi...

Soils are called problematic soils when they do not have sufficient bearing strength to provide a founda-tion for the structures be built on them and these types of need improved with appropriate methods depending their properties. Improvement applied strengthen often cause financial burden. Recently, there studies about use waste rubber tires, which pose an environ-mental risk during storage, ...