摘要
通过建立仿真模型,分析了交叉隧道中间岩柱的稳定性与位移变化规律。结合位移及应力特征,提出了3种中间岩柱的处理方案。通过仿真模型计算,比较了3种方案中隧道静态受力状态下的位移,及施工状态下的围岩位移,选择了锚网喷+U型梁+中间岩柱预应力锚索的中间岩柱处理方案。通过工程实例验证了中间岩柱处理方案的可行性。
A simulation model is established to analyze the law of stability and displacement of the middle rock column in a crossing tunnel.Combined with the displacement and stress characteristics,3 construction solutions for the middle rock column are proposed.Through simulation calculation,the displacement in static stress state of metro tunnel,the displace原ment of surrounding rock in construction state and the solution for the middle rock column in bolting net spray+U beam+prestressed anchorage cable are compared and the last one is selected.The application of this scheme is verified through practical engineering project.
作者
陈淑珍
孙敬涛
CHEN Shuzhen;SUN Jingtao(Chongqing Vocational Institute of Engineering,402260,Chongqing,China)
出处
《城市轨道交通研究》
北大核心
2018年第3期107-111,共5页
Urban Mass Transit
关键词
破碎岩层
斜交隧道
加固措施
数值模拟
broken stratum
crossing tunnel
reinforcement measure
numerical simulation
