Failure mechanism of tunnel lining joints and bolts with uneven longitudinal ground settlement

被引:80
作者
Wang, Zhan [2 ]
Wang, Lizhong [1 ]
Li, Lingling [1 ]
Wang, Jingchang [1 ]
机构
[1] Zhejiang Univ, Coll Civil Engn & Architecture, Hangzhou 310058, Zhejiang, Peoples R China
[2] CCCC Fourth Harbor Engn Inst Co Ltd, Guangzhou 510288, Guangdong, Peoples R China
关键词
Tunnel lining; Longitudinal ground settlement; Circumferential joint; Failure mechanism;
D O I
10.1016/j.tust.2013.10.007
中图分类号
TU [建筑科学];
学科分类号
0813 ;
摘要
To simulate the failure mechanism of tunnel segmental lining joints and longitudinal bolts under uneven longitudinal ground settlement, a numerical model with 3D lining rings and bolts was established. The loads were divided into two parts: the soil pressure around the tunnel just after construction and a displacement loading according to field measurements of uneven longitudinal ground settlement. The interactions between the lining tenons, bolts and their holes, were determined. The results indicated that the deformation of the circumferential joints consisted of opening and dislocation, but the dislocation was dominant. The progressive failure of bolts and waterproofing measures were also revealed. The evaluation of structural integrity of circumferential joint and the mitigate measures were proposed in order to ensure the operational safety of a metro tunnel. (C) 2013 Elsevier Ltd. All rights reserved.
引用
收藏
页码:300 / 308
页数:9
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