A new design equation for drained stability of conical slopes in cohesive-frictional soils

被引：46

作者：

Ukritchon, Boonchai ^{[1
]}

Keawsawasvong, Suraparb ^{[1
]}

机构：

[1] Chulalongkorn Univ, Fac Engn, Dept Civil Engn, Geotech Res Unit, Bangkok 10330, Thailand

来源：

JOURNAL OF ROCK MECHANICS AND GEOTECHNICAL ENGINEERING | 2018年 / 10卷 / 02期

关键词：

Limit analysis; Slope stability; Conical slope; Unsupported excavation; Cohesive-frictional soils; BOUND LIMIT ANALYSIS; FINITE-ELEMENT-ANALYSIS; UNDRAINED STABILITY; STRENGTH REDUCTION; PULLOUT CAPACITY; LATERAL CAPACITY; CHARTS; EXCAVATIONS; CAISSONS; SURFACE;

D O I：

10.1016/j.jrmge.2017.10.004

中图分类号：

P5 [地质学];

学科分类号：

0709 ; 081803 ;

摘要：

New plasticity solutions to the drained stability of conical slopes in homogeneous cohesive-frictional soils were investigated by axisymmetric finite element limit analysis. Three parameters were studied, i.e. excavated height ratios, slope inclination angles, and soil friction angles. The influences of these parameters on the stability factor and predicted failure mechanism of conical slopes were discussed. A new design equation developed from a nonlinear regression of the lower bound solution was proposed for drained stability analyses of a conical slope in practice. Numerical examples were given to demonstrate a practical application of the proposed equation to stability evaluations of conical slopes with both associated and non-associated flow rules. (C) 2018 Institute of Rock and Soil Mechanics, Chinese Academy of Sciences. Production and hosting by Elsevier B.V.

引用

页码：358 / 366

页数：9

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