地下隧洞围岩抗震支护措施模拟及抗震支护效果分析  

Simulation of anti-seismic support measures and analysis of antiseismic support effect for surrounding rock of underground tunnel

作　　者：刘国庆 张艳红[1] 杨陈[1] 肖明[2] LIU Guoqing;ZHANG Yanhong;YANG Chen;XIAO Ming(State Key Laboratory of Simulation and Regulation of Water Cycle in River Basin,China Institute of Water Resources and HydropowerResearch,Beijing100048,China;State Key Laboratory of Water Resources Engineering and Management,Wuhan University,Wuhan 430072,China)

机构地区：[1]中国水利水电科学研究院流域水循环模拟与调控国家重点实验室,北京100048 [2]武汉大学水资源工程与调度全国重点实验室,湖北武汉430072

出　　处：《武汉大学学报（工学版）》2024年第3期277-285,共9页Engineering Journal of Wuhan University

基　　金：国家自然科学基金项目(编号:52079097)。

摘　　要：锚杆和衬砌是保证地震作用下隧洞围岩稳定的2种重要支护措施。将全长粘结式锚杆分段处理,建立复合加锚岩体单元模型,从物理参数加固和支护反力约束2个方面研究了锚杆对围岩的支护效应,据此提出了锚杆的抗震支护模拟方法。基于动接触力算法,通过模拟衬砌与围岩的动态接触过程,形成衬砌的抗震支护模拟方法。以某引水隧洞工程为例,研究了锚杆和衬砌2种支护措施支护参数的变化对围岩抗震效果的影响。结果表明:地震作用下锚杆和衬砌均具有良好的支护效果,但锚杆支护效果要优于衬砌,并且锚杆、衬砌均存在最优支护参数。计算成果可为地下隧洞的抗震支护优化设计提供科学依据。Bolt and lining are two important support measures to ensure the stability of tunnel surrounding rock under seismic action.The fully grouted rock bolt was treated in sections,and a composite anchored rock mass element model was established.The support effect of bolt on surrounding rock was studied from two aspects:physical parameter reinforcement and support reaction constraint,and then an anti-seismic support simulation method for bolt was proposed.The dynamic contact process between lining and surrounding rock was simulated by the dynamic contact force algorithm,and an anti-seismic support simulation method for lining was formed.Then,taking a diversion tunnel project as an example,the influences of support parameters of bolt and lining on the anti-seismic effect of surrounding rock were studied.The results show that bolt and lining both have good support effect under seismic action.But on the whole,bolt support effect is better than that of lining,and there are optimal support parameters for bolt and lining.The calculation results can provide a scientific basis for the optimal design of anti-seismic support of underground tunnel.

关 键 词：地下隧洞 锚杆支护 衬砌支护 抗震支护效果 地震响应 

分 类 号：TU45[建筑科学—岩土工程]