Lateral earth pressure

About: Lateral earth pressure is a research topic. Over the lifetime, 5334 publications have been published within this topic receiving 62552 citations.

Friction capacity of piles driven into clay

Abstract: Several studies on axial pile capacity in clays have shown that the average frictional resistance, expressed as a fraction of the average undrained shear strength or average effective overburden pressure, decreases with increasing pile penetration. Procedures to compute shaft friction are reviewed, and the effect of pile length on the development of shaft friction on piles in clay is examined in terms of the relative pile-soil stiffness and lateral pile movements during installation. Correlations are developed to relate shaft friction coefficients α,β,λ, to pile length, relative pile-soil stiffness, and soil stress history. Procedures are recommended to compute the friction capacity of piles in clay.

Full-Scale Field Trials of Tire Shreds as Lightweight Retaining Wall Backfill Under At-Rest Conditions

Abstract: A 4.88-m (16-ft), full-scale retaining wall test facility was constructed to investigate the use of tire shreds as backfill for conventional retaining walls. The facility can test backfill at at-rest and active conditions and is instrumental for measuring horizontal stress and interface shear. Tire shreds from three suppliers were tested. The results for at-rest conditions are presented. The average at-rest horizontal stress for tire shreds was about 45 percent less than expected for conventional granular backfill. Moreover, the at-rest horizontal stress was about the same for tire shreds from the three suppliers. Design parameters were developed by using two procedures. The first used the coefficient of lateral earth pressure and the other was based on equivalent fluid pressure. The horizontal and shear forces acting on the concrete face of the wall were used to determine the angle of wall friction, which ranged from 30° to 32° for tire shreds from the three suppliers.

Stress-Dilatancy, Earth Pressures, and Slopes

Abstract: The physical laws are stated that govern inter-particle sliding in soils that consist of individual particles in contact. A few examples illustrate how these laws fit, and yet qualify, current thought on deformation and failure, energy corrections, and the concept of a yield surface. The general equation for the stability of earth masses is developed and applied to the cases of active and passive pressure, slope stability, and bearing capacity. The equations, which include work done both internally and externally during volume change, yield solutions that are identical to those based on the Coulomb equation in the special case of no volume-change rate during failure. Much more attention to the particulate nature of soils is essential if fundamental progress in soil mechanics is to be achieved. Such treatment can still lead to simple practical applications along lines similar to those in present (1963) use.