A Study on the Stability of Reinforced Tunnel Face Using Horizontal Pre-Grouting

被引：3

作者：

Ren, Yuxin ^{[1
]}

Zhang, Jingtao ^{[2
]}

Chen, Dongdong ^{[1
]}

Sun, Yanding ^{[2
]}

Kong, Lingzhao ^{[1
]}

机构：

[1] China Univ Min & Technol Beijing, Sch Energy & Min Engn, Beijing 100083, Peoples R China

[2] China Construct Second Engn Bur Ltd, Beijing 100160, Peoples R China

来源：

PROCESSES | 2023年 / 11卷 / 07期

基金：

英国科研创新办公室; 中国国家自然科学基金;

关键词：

shield tunnel; soft soil; face stability; reinforcement; limit equilibrium method; SHALLOW CIRCULAR TUNNELS; SHIELD TUNNEL; SEEPAGE; FAILURE; MODEL; SOIL; CENTRIFUGE;

D O I：

10.3390/pr11072044

中图分类号：

TQ [化学工业];

学科分类号：

0817 ;

摘要：

As tunnel excavation under poor geological conditions is liable to cause ground collapses, reinforcement measures are necessary to reduce construction risks. The stability of a tunnel face that was reinforced using horizontal pre-grouting was investigated through numerical simulation and theoretical analysis in this study. An analytical model was developed using the limit equilibrium method and taking into account the impact of horizontal grouting reinforcement (HGR) on the tunnel face. Subsequently, a comprehensive numerical simulation was conducted to confirm the validity of the model. By performing a parametric analysis, it was found that the limit support pressure exhibited a linear relationship with the cohesion and friction angle. In addition, the limit support pressure is more sensitive to changes in the cohesion and friction angle than changes in the stiffness ratio and thickness of HGR. The HGR more effectively decreases the limit support pressure in conditions of low cohesion (or friction angle) compared with conditions of high cohesion (or friction angle).

引用

页数：16

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