Upper-Bound Limit Analysis of Unsaturated Soil Slopes under Rainfall

被引：36

作者：

Huang, Wengui ^{[1
]}

Leong, Eng-Choon ^{[1
]}

Rahardjo, Harianto ^{[1
]}

机构：

[1] Nanyang Technol Univ, Sch Civil & Environm Engn, Blk N1,50 Nanyang Ave, Singapore 639798, Singapore

来源：

JOURNAL OF GEOTECHNICAL AND GEOENVIRONMENTAL ENGINEERING | 2018年 / 144卷 / 09期

关键词：

Unsaturated soil slope; Pore-water pressure; Analytical stability analysis; Upper bound limit analysis; Rotational failure; Translational failure; STABILITY ANALYSIS; SHEAR-STRENGTH; SURFICIAL STABILITY; MODELING INFILTRATION; MATRIC SUCTION; TRANSIENT; WATER; FAILURE; CHARTS; PERMEABILITY;

D O I：

10.1061/(ASCE)GT.1943-5606.0001946

中图分类号：

P5 [地质学];

学科分类号：

0709 ; 081803 ;

摘要：

This paper presents an analytical framework for the stability analysis of unsaturated soil slopes under rainfall. The conventional log-spiral upper bound limit analysis for dry and saturated soil slopes is extended to unsaturated soil slopes by incorporating matric suction and rainfall infiltration. For an unsaturated soil slope under rainfall, shallow translational failure may be more critical than rotational failure. Hence, a translational failure mechanism in the context of upper bound plasticity theory is proposed, and its effectiveness is validated by finite-element analysis. Through the dimensionless stability charts developed by the upper bound limit analysis, the controlling factors on the failure mode of unsaturated soil slopes under rainfall are identified and investigated.

引用

页数：10

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