Reliability analysis of shallow-buried tunnel construction adjacent to karst cave

被引：15
|
作者：
Wu, Bo [1 ,4 ,5 ]
Sun, Wentao [1 ]
Cai, Ganwei [3 ]
Meng, Guowang [1 ,2 ]
机构：
[1] Guangxi Univ, Sch Civil Engn & Architecture, Nanning 530004, Guangxi, Peoples R China
[2] Guangxi Univ, Key Lab Disaster Prevent & Struct Safety, Minist Educ, Nanning 530004, Guangxi, Peoples R China
[3] Guangxi Univ, Sch Mech Engn, Nanning 530004, Guangxi, Peoples R China
[4] East China Univ Technol, Sch Civil & Architectural Engn, Nanchang 330013, Jiangxi, Peoples R China
[5] Guangzhou City Construct Coll, Sch Architectural Engn, Guangzhou 510925, Guangdong, Peoples R China
来源：
COMPUTERS AND GEOTECHNICS | 2022年 / 145卷
基金：
中国国家自然科学基金;
关键词：
Tunnel construction; Karst cave; Limit analysis; Instability probability; FACE STABILITY; CIRCULAR TUNNELS; ROCK MASSES; MECHANISMS;
D O I：
10.1016/j.compgeo.2022.104673
中图分类号：
TP39 [计算机的应用];
学科分类号：
081203 ; 0835 ;
摘要：
In this paper, based on the upper-bound theorem of limit analysis and the reliability theory, the reliability performance function of the rock and soil mass around the tunnel and the karst cave should be constructed. Through Matlab software programming, the instability probability and reliability index of the rock and soil mass around the tunnel and the karst cave are calculated by applying the Monte Carlo method. Applying the method to practical engineering, the reliability of the rock and soil in each damage zone in the karst area is studied. The study shows that when the ratio of tunnel buried depth to tunnel diameter is greater than 2, the tunnel passes through the moderately weathered dolomite layer or the slightly weathered dolomite layer, the self-supporting capacity of the rock and soil mass in front of the tunnel face has been significantly enhanced. The stability of the rock and soil mass around the left side of the karst cave has been significantly enhanced when the ratio of the clear distance between the cave and the bottom of the tunnel to cave diameter is greater than 2.
引用
收藏
页数：12
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