Upper-bound stability analysis of dual unlined elliptical tunnels in cohesive-frictional soils

被引：29
|
作者：
Zhang, Jian [1 ]
Yang, Feng [1 ]
Yang, Junsheng [1 ]
Zheng, Xiangcou [1 ]
Zeng, Fanxuan [1 ]
机构：
[1] Cent S Univ, Sch Civil Engn, Changsha 410075, Hunan, Peoples R China
来源：
COMPUTERS AND GEOTECHNICS | 2016年 / 80卷
基金：
中国国家自然科学基金;
关键词：
Dual elliptical tunnels; Finite element limit analysis; Center-to-center distance; Upper-bound solution; Collapse mechanism; CIRCULAR TUNNELS; UNDRAINED STABILITY; SQUARE TUNNELS; TWIN-TUNNELS;
D O I：
10.1016/j.compgeo.2016.08.023
中图分类号：
TP39 [计算机的应用];
学科分类号：
081203 ; 0835 ;
摘要：
This study investigates the stability of dual unlined elliptical tunnels in cohesive-frictional soils using upper-bound finite element methods with rigid translatory moving elements (UBFEM-RTME). Results are determined in terms of dimensionless stability numbers, which increase with phi and decrease with increasing BID and CID, and collapse mechanisms, which mainly include two wedge-shaped zones and a complete non-plastic wedge. The center-to-center distance S significantly affects the stability of dual tunnels, and the interaction between the elliptical tunnels tends to disappear when S-c lies within (i) 2.5D-4D for C/D = 1, and (ii) 4D-11D for C/D = 5. The results agree well with those in literature. (C) 2016 Elsevier Ltd. All rights reserved.
引用
收藏
页码：283 / 289
页数：7
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