V类围岩条件下岔洞稳定性数值计算分析及综合支护评价  

Numerical Calculation Analysis and Comprehensive Support Evaluation on Stability of Tunnel Intersection in Class V Surrounding Rock

作　　者：何帅 HE Shuai(Xinjiang Water Conservancy and Electric Power Construction Corporation,Urumqi 830000,China)

机构地区：[1]新疆水利电力建设总公司,乌鲁木齐830000

出　　处：《水利科技与经济》2021年第7期38-44,共7页Water Conservancy Science and Technology and Economy

摘　　要：破碎围岩条件下隧洞交叉部位稳定性是保证工程运行的关键因素,也是隧洞工程的研究热点。现以新疆某调水工程为例,采用有限差分计算软件,基于理想弹塑性本构模型,对V类破碎围岩条件下岔洞围岩及综合衬砌进行三维数值计算,得到围岩的应力分布、位移分布以及塑性分布特性,评价破碎围岩条件下岔洞的综合衬砌效果,并根据计算结果,提出岔洞的开挖及支护建议。研究结果可为岔洞开挖及支护提供参考。The stability of tunnel intersection under broken surrounding rock condition is the key factor to ensure the operation of the project and is also the research hotspot of tunnel engineering.In this paper,based on a water diversion project in Xinjiang,using finite difference calculation software,based on the ideal elastic-plastic constitutive model,the three-dimensional numerical calculation of the bifurcation tunnel surrounding rock and comprehensive lining under the condition of class V broken surrounding rock is carried out,the stress distribution,displacement distribution and plastic distribution characteristics of surrounding rock are obtained,and the comprehensive lining effect of the bifurcation tunnel under the condition of broken surrounding rock is evaluated,the excavation and support suggestions of the bifurcated tunnel are put forward.The research results can provide reference for the excavation and support of tunnel intersection.

关 键 词：V类围岩 岔洞 围岩稳定 数值计算 

分 类 号：TU457[建筑科学—岩土工程]