Granular mechanics of the lateral earth pressure in plane stress state

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

Among others, lateral earth pressure on a rigid retaining wall is one of the soil mechanics problems which can be successfully solved using the granular mechanics, provided that the contact force network is caused by the soil own weight. Assessment of the backfill stress state is reduced to the geometric problem of determining the intersections between the force network lines and the backfill sloping surface, having account of the constraints imposing by the wall back side. The backfill pressure on the wall may be calculated by finding the stress tensor at every point of the backfill, or by applying the law of sines to the unit forces polygon. In this paper, the coefficient of lateral earth pressure is derived for two cases: A backfill with uniform stress state, and a backfill with wall friction; both of them at rest and plastic states. For yielding soils, the first case is compared with the generalized Rankine's theory, revealing the total conformity of both theories; and the second, with the rigorous Boussinesq's plastic theory, showing to be the best fit. From the results, it is concluded that granular mechanics compresses in a unique theory the at rest and plastic states of granular soils, furnishes generalized formulas for calculating the lateral pressure exerted by a straight-boundary soil, and provides a rigorous but very simple method for a broken-boundary soil.

Original languageEnglish
Title of host publicationComputer Methods and Recent Advances in Geomechanics - Proc. of the 14th International Conference of International Association for Computer Methods and Recent Advances in Geomechanics, IACMAG 2014
PublisherTaylor and Francis - Balkema
Pages1101-1106
Number of pages6
ISBN (Print)9781138001480
DOIs
StatePublished - 2015
Event14th International Conference of International Association for Computer Methods and Recent Advances in Geomechanics, IACMAG 2014 - Kyoto, Japan
Duration: 22 Sep 201425 Sep 2014

Publication series

NameComputer Methods and Recent Advances in Geomechanics - Proceedings of the 14th Int. Conference of International Association for Computer Methods and Recent Advances in Geomechanics, IACMAG 2014

Conference

Conference14th International Conference of International Association for Computer Methods and Recent Advances in Geomechanics, IACMAG 2014
Country/TerritoryJapan
CityKyoto
Period22/09/1425/09/14

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