岩土工程学报2025，Vol.47Issue(11)：2264-2273,10.DOI:10.11779/CJGE20240222
气压辅助掘进盾构开挖面失稳机制及土拱效应三维物质点法研究
Failure mechanism of tunnel face and soil arch effects in auxiliary air balanced shield using three-dimensional material point method
摘要
Abstract
The collapse of tunnel face poses a serious threat to the safety of tunnel construction,and a comprehensive understanding of the entire evolutionary failure mechanism is the key premise for disaster prevention and treatment measures.By using the three-dimensional material point method(MPM),the large deformation behaviours of the collapse of tunnel face in the auxiliary air pressure balanced shield are investigated.The effectiveness of the MPM in analyzing the failure problems of tunnel face is validated by comparing the results of the limit support force,ground settlement and stress distribution with those of the experimental tests.Subsequently,a series of field-scale numerical simulations are conducted to explore the dynamic characteristics of collapse of tunnel face,response of ground deformation,and evolution of soil arch under various burial depths,support air pressures and cutter head types.The results demonstrate that the development rate and final mass of the collapse of tunnel face are reduced by the support of air pressure and cutter head,and a faster early collapse rate is observed in a deeper burial depth.The soil arch emerges with the ground deformation induced by the collapse of tunnel face,and the collapse of ground surface grows rapidly when the soil arch reaches the ground surface and vanishes.The MPM can effectively capture the entire dynamic process of the collapse of tunnel face in the auxiliary air pressure balanced shield,therefore providing valuable insights for preventing the collapse of tunnel face and predicting the post-failure behaviors in similar projects.关键词
盾构隧道/物质点法/气压辅助掘进/开挖面失稳/土拱Key words
shield tunnel/material point method/auxiliary air pressure tunnelling/tunnel face instability/soil arch分类
土木建筑引用本文复制引用
王树英,刘霆宇,郑响凑,张涛..气压辅助掘进盾构开挖面失稳机制及土拱效应三维物质点法研究[J].岩土工程学报,2025,47(11):2264-2273,10.基金项目
国家自然科学基金项目(52022112) （52022112）
国家自然科学基金青年基金项目(52308425) （52308425）
博士后国际交流计划引进项目(YJ20220219) （YJ20220219）
中国博士后科学基金特别资助项目(2023TQ0382) （2023TQ0382）
中南大学中央高校基本科研业务费专项资金项目(2023ZZTS0675)This work was supported by National Natural Science Foundation of China(Grant No.52022112),National Natural Science Foundation of China(Grant No.52478403),National Natural Science Foundation of China(Grant No.52308425),Postdoctoral International Exchange Program(Grant No.YJ20220219),China Postdoctoral Science Foundation(Grant No.2023TQ0382)and Fundamental Research Funds for the Central Universities of Central South University(Grant No.2023ZZTS0675). （2023ZZTS0675）
