Passive resistance of unsaturated backfill under steady state flow conditions

IF 1.7 Q3 ENGINEERING, GEOLOGICAL

Geomechanics and Geoengineering-An International Journal Pub Date : 2021-08-03 DOI:10.1080/17486025.2021.1955163

R. Ganesh, J. Sahoo, S. Rajesh

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引用次数: 3

Abstract

ABSTRACT This paper presents a unified semi-analytical solution to investigate the passive earth resistance of unsaturated soils retained by a rigid wall in the framework of limit-equilibrium approach based on a rotational log-spiral failure mechanism. Coupled influences of unit weight and suction stress changes in unsaturated soils under different steady vertical flow conditions have been considered to provide a more realistic solution. The impact of different parameters such as effective internal friction angle soil, inclination of backfill surface and wall back face, surcharge pressure, height of wall, location of water table, and soil–wall interface friction has been explored by performing a parametric study. It has been found that the changes in the suction stress and unit weight of unsaturated soils under different input parameters have a greater effect on modifying the critical slip surface, and magnitude and point of application of passive earth resistance on the retaining walls. The results obtained from the present study compare reasonably well with the solutions in the literature.

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稳态流动条件下非饱和充填体的被动阻力

摘要:本文提出了基于旋转对数螺旋破坏机制的极限平衡框架下非饱和土刚性墙被动土抗力的统一半解析解。考虑了不同稳定垂直流动条件下非饱和土的单位重量和吸力变化的耦合影响，提供了更现实的解决方案。通过参数化研究，探讨了土体有效内摩擦角、回填面与墙后面的倾角、堆载压力、墙高、地下水位位置、土-墙界面摩擦力等参数的影响。研究发现，不同输入参数下非饱和土的吸力应力和单位重量的变化对挡土墙的临界滑移面、被动土阻力的大小和施加点的影响较大。从本研究中得到的结果与文献中的解决方案比较得相当好。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Geomechanics and Geoengineering-An International Journal ENGINEERING, GEOLOGICAL-

CiteScore

3.80

自引率

0.00%

发文量

期刊介绍： Geomechanics is concerned with the application of the principle of mechanics to earth-materials (namely geo-material). Geoengineering covers a wide range of engineering disciplines related to geo-materials, such as foundation engineering, slope engineering, tunnelling, rock engineering, engineering geology and geo-environmental engineering. Geomechanics and Geoengineering is a major publication channel for research in the areas of soil and rock mechanics, geotechnical and geological engineering, engineering geology, geo-environmental engineering and all geo-material related engineering and science disciplines. The Journal provides an international forum for the exchange of innovative ideas, especially between researchers in Asia and the rest of the world.