Numerical Simulation of Surrounding Rock Deformation and Grouting Reinforcement of Cross-Fault Tunnel under Different Excavation Methods  

作　　者：Duan Zhu Zhende Zhu Cong Zhang LunDai Baotian Wang 

机构地区：[1]Key Laboratory of Ministry of Education for Geomechanics and Embankment Engineering,Hohai University,Nanjing,210098,China [2]Jiangsu Research Center for Geotechnical Engineering Technology,Hohai University,Nanjing,210098,China

出　　处：《Computer Modeling in Engineering & Sciences》2024年第3期2445-2470,共26页工程与科学中的计算机建模（英文）

基　　金：the Postgraduate Research and Practice Innovation Program of Jiangsu Province(Grant No.KYCX22_0621);the National Natural Science Foundation of China(Grant No.52209130);Jiangsu Funding Program for Excellent Postdoctoral Talent.

摘　　要：Tunnel construction is susceptible to accidents such as loosening, deformation, collapse, and water inrush, especiallyunder complex geological conditions like dense fault areas. These accidents can cause instability and damageto the tunnel. As a result, it is essential to conduct research on tunnel construction and grouting reinforcementtechnology in fault fracture zones to address these issues and ensure the safety of tunnel excavation projects. Thisstudy utilized the Xianglushan cross-fault tunnel to conduct a comprehensive analysis on the construction, support,and reinforcement of a tunnel crossing a fault fracture zone using the three-dimensional finite element numericalmethod. The study yielded the following research conclusions: The excavation conditions of the cross-fault tunnelarray were analyzed to determine the optimal construction method for excavation while controlling deformationand stress in the surrounding rock. The middle partition method (CD method) was found to be the most suitable.Additionally, the effects of advanced reinforcement grouting on the cross-fault fracture zone tunnel were studied,and the optimal combination of grouting reinforcement range (140°) and grouting thickness (1m) was determined.The stress and deformation data obtained fromon-site monitoring of the surrounding rock was slightly lower thanthe numerical simulation results. However, the change trend of both sets of data was found to be consistent. Theseresearch findings provide technical analysis and data support for the construction and design of cross-fault tunnels.

关 键 词：Cross-fault tunnel finite element analysis excavation methods surrounding rock deformation grouting reinforcement 

分 类 号：U45[建筑科学—桥梁与隧道工程]