阿尔塔什水利枢纽埋藏式调压井穹顶施工数值仿真  

Numerical simulation of dome construction of buried surge tank in water control project of the ATS

作　　者：吴俊杰[1] WU Junjie(Xinjiang Survey and Design Institute for Water Resources and Hydropower,Urumqi 830000,China)

机构地区：[1]新疆水利水电勘测设计研究院,新疆乌鲁木齐830000

出　　处：《中国水利水电科学研究院学报》2020年第5期388-394,共7页Journal of China Institute of Water Resources and Hydropower Research

摘　　要：鉴于新疆阿尔塔什水利枢纽工程发电洞地下埋藏式调压井上部围岩较薄、开挖跨度大、地质条件复杂等突出问题,本文结合施工单位提供的初拟开挖方案,采用三维有限元法验证了该施工方案的合理性。得到无支护与有支护条件下岩体的应力变形特性,并提出了更合理的开挖顺序与支护方案,为竖井安全施工提供了保障。同时,探明了地下洞室开挖施工模拟,系统锚杆、锚索的预应力施加方式等计算方法的有效性,本文成果为今后类似地下洞室开挖施工方案优化提供借鉴。In view of the prominent problems such as thin surrounding rock,large excavation span and complex geological conditions of underground buried surge shaft in power tunnel of ATS water control proj-ect in Xinjiang,the rationality of the construction scheme is verified by three-dimensional finite element method combined with the preliminary excavation scheme provided by the construction unit.The stress and deformation characteristics of rock mass without support and with support are obtained,and a more reason-able excavation sequence and support scheme are proposed,which provides guarantee for the safe construc-tion of shaft.At the same time,the validity of the calculation methods,such as the construction simula-tion of underground cavern excavation,the prestressing method of system anchor and anchor cable,is proved.The results of this paper can provide reference for similar underground cavern excavation construc-tion scheme optimization in the future.

关 键 词：地下埋藏式调压井 开挖支护方案 预应力锚索 有限元计算分析 

分 类 号：TV554[水利工程—水利水电工程] TV61