大山口引水隧洞开挖与支护的数值分析  

Excavation and Support Simulation Analysis of Diversion Tunnel for Dashankou Power Station

作　　者：余超[1] 邓成进[2] 侍克斌[1] 李俊美[2] 

机构地区：[1]新疆农业大学水利土木工程学院,新疆乌鲁木齐830000 [2]三峡大学土木与建筑学院,湖北宜昌443002

出　　处：《水电能源科学》2010年第10期86-89,共4页Water Resources and Power

摘　　要：基于开挖施工过程,分析计算了开挖卸荷和支护后围岩位移工况及应力分布,并采用有限差分软件FLAC3D对围岩的位移与应力进行了比较,综合评价了洞室在开挖支护后的稳定性。结果表明,开挖卸荷未支护条件下围岩稳定性较差,可能影响开挖施工,及时采取支护措施后围岩的位移场和应力场可得到改善,稳定性提高。可为设计和施工支护提供参考。According to excavation process,the displacement and stress distribution of surrounding rock are analyzed under the conditions of excavation unloading and support.And then finite difference software FLAC3D is used to analyze the displacement and stress distribution of the surrounding rock.Finally,the surrounding rock stability with support is comprehensively evaluated.The results show that stability of surrounding rock is poor at the conditions of excavation unloading and without support,which may affect the excavation process;the displacement and stress fields of the surrounding rock have been improved and its stability is also enhanced if support measures are taken promptly.Thus,it provides reference for design and construction of support.

关 键 词：大山口 引水隧洞 开挖与支护 数值分析 Power Station DIVERSION Tunnel 围岩稳定性 开挖卸荷 开挖施工 位移场和应力场 有限差分软件 综合评价 支护条件 支护措施 应力分布 围岩位移 施工支护 施工过程 开挖支护 分析计算 

分 类 号：TK79[动力工程及工程热物理—流体机械及工程] TV7[水利工程—水利水电工程]