Undrained stability of strip footing above voids in two-layered clays by finite element limit analysis

被引：36
|
作者：
Xiao, Yao [1 ]
Zhao, Minghua [1 ]
Zhao, Heng [1 ]
机构：
[1] Hunan Univ, Inst Geotech Engn, Changsha 410082, Hunan, Peoples R China
来源：
COMPUTERS AND GEOTECHNICS | 2018年 / 97卷
基金：
中国国家自然科学基金;
关键词：
Strip footing; Voids; Finite element limit analysis; Undrained bearing capacity; Clays; BEARING CAPACITY; TUNNELS; SOIL; FOUNDATION; BEHAVIOR; ANCHORS; LOAD;
D O I：
10.1016/j.compgeo.2018.01.005
中图分类号：
TP39 [计算机的应用];
学科分类号：
081203 ; 0835 ;
摘要：
Finite element limit analysis (FELA) is used to study the undrained bearing capacity of strip footing above voids in two-layered clays. Based on the FELA results, design charts and equations are provided to calculate the undrained bearing capacity factor N-s. The impact of parameters on N-s , also has been investigated, including undrained shear stress ratio of the soil, thickness of the top layer, location, size, width, height and spacing of the voids. The failure mechanisms for a single void maybe classified into three categories: roof failure, combined roof and wall failure, bearing failure without void failure.
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页码：124 / 133
页数：10
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