Analysis of face stability at the launch stage of shield or TBM tunnelling using a concrete box in complex urban environments

被引:9
作者
Huang, Ming [1 ,2 ]
Lu, Yao [1 ]
Zhen, Jiajie [1 ]
Lan, Xingbin [3 ]
Xu, Chaoshui [4 ]
Yu, Wenlong [5 ]
机构
[1] Fuzhou Univ, Sch Civil Engn, Fuzhou, Peoples R China
[2] Wuhan Univ, Sch Civil Engn, Wuhan, Peoples R China
[3] Fujian Acad Bldg Res Co Ltd, Fuzhou, Peoples R China
[4] Univ Adelaide, Sch Civil Environm & Min Engn, Adelaide, Australia
[5] Sixth Engn Co Ltd, China Railway 17th Bur Grp, Xiamen, Peoples R China
基金
中国国家自然科学基金;
关键词
Upper -bound analysis; Tunnel face stability; Tunnelling launch; Concrete box; Soil arching effect; EARTH PRESSURE; MODEL;
D O I
10.1016/j.tust.2023.105067
中图分类号
TU [建筑科学];
学科分类号
0813 ;
摘要
An emerging construction method using a concrete box can effectively reduce the risks such as face collapse and extrusion at the launch stage of shield or tunnel boring machine (TBM) tunnelling. It occupies a small con-struction plant and can be applied to complex urban environments, especially in mountainous cities. However, the failure mechanisms of the tunnel face at the launch stage of the novel method are still not properly un-derstood. Based on the upper-bound theorem of the limit analysis (LA), two multi-block failure models are proposed in this work for tunnelling launch in semi-infinite body and in areas with slope overburden. The limit equilibrium (LE) method is used to obtain the vertical earth pressure of upper finite soil mass considering the soil arching effect. The comparisons of the support pressure, failure zone and dip angle of the slip surface obtained from the proposed models with the results of numerical simulations and previous studies indicate that the proposed approach provides realistic and satisfactory predictions. The effects of soil cohesion, internal friction angle, slope dip angle, reduction coefficient and the ratio of tunnel diameter to overburden width are further assessed. The proposed models were applied to two practical engineering cases to determine reinforcement measures using grouting and pipe-roof methods required during the tunnelling launch, and were demonstrated to be able to provide useful guidance for the practical operations.
引用
收藏
页数:15
相关论文
共 41 条
[1]   Effects of Portal Failure on Tunnel Support Systems in a Highway Tunnel [J].
Aygar, E. B. ;
Gokceoglu, C. .
GEOTECHNICAL AND GEOLOGICAL ENGINEERING, 2021, 39 (08) :5707-5726
[2]  
BROERE W., 2001, Tunnel Face Stability New CPT Applications
[3]   Shallow tunnel face stability considering pore water pressure in non-homogeneous and anisotropic soils [J].
Chen Guang-hui ;
Zou Jin-feng ;
Chen Jia-qi .
COMPUTERS AND GEOTECHNICS, 2019, 116
[4]  
Chen GZ, 2013, ROCK SOIL MECH, V34, P2643
[5]  
Chen W.-F., 1975, LIMIT ANAL SOIL PLAS
[6]   Face stability analysis of a shallow square tunnel in non-homogeneous soils [J].
Guang-hui, Chen ;
Jin-feng, Zou ;
Qi, Min ;
Wu-jun, Guo ;
Tai-zhong, Zhang .
COMPUTERS AND GEOTECHNICS, 2019, 114
[7]   Upper-bound solutions for the face stability of a shield tunnel in multilayered cohesive-frictional soils [J].
Han, Kaihang ;
Zhang, Chengping ;
Zhang, Dingli .
COMPUTERS AND GEOTECHNICS, 2016, 79 :1-9
[8]   Three-dimensional tunnel face stability considering slurry pressure transfer mechanisms [J].
Hou, Chuantan ;
Pan, Qiujing ;
Xu, Tao ;
Huang, Fu ;
Yang, Xiaoli .
TUNNELLING AND UNDERGROUND SPACE TECHNOLOGY, 2022, 125
[9]   Analysis of the Stress Distribution in Inclined Backfilled Stopes Using Closed-form Solutions and Numerical Simulations [J].
Jahanbakhshzadeh, Abtin ;
Aubertin, Michel ;
Li, Li .
GEOTECHNICAL AND GEOLOGICAL ENGINEERING, 2018, 36 (02) :1011-1036
[10]  
Li Peng-fei, 2013, China Journal of Highway and Transport, V26, P130