积石峡水电站泄洪洞与导流洞交叉段大洞室设计与施工  

Design and construction of large cavern in the intersection of spillway tunnel and diversion tunnel for Jishixia hydropower project

作　　者：任苇[1] 王康柱[1] 益波[1] 

机构地区：[1]中国水电顾问集团西北勘测设计研究院,西安710065

出　　处：《西北水电》2011年第6期27-29,共3页Northwest Hydropower

摘　　要：积石峡水电站左岸中孔泄洪洞由导流洞改建而成,泄洪洞与导流洞的交叉段为不对称顶拱的大断面洞室,具有结构受力及地质条件复杂的特点。设计通过采用有限元法确定施工工序,块体理论分析确定支护措施,以及对于不对称顶拱城门洞型断面,采用有限元法与边值法结合的结构配筋计算等方法,有效解决了洞室开挖支护、永久结构设计等难题。The middle outlet spillway tunnel on the left bank of Jishixia hydropower project is rebuilt from the diversion tunnel, the intersection of the spillway tunnel and diversion tunnel is a cavern with large section and asymmetric crown, characterized by the stressed structure and complex geological conditions. By use of finite element method to determine the construction process, block theory to analyze and determine support measures, and the combined finite element method and boundary value method to calculate the structural reinforcement for the horseshoe section with asymmetric crown, designers effectively salved the problems of tunnel excavation support and permanent structure design.

关 键 词：泄洪洞 大断面洞室 结构设计 有限元法 块体理论 边值法 

分 类 号：TV651[水利工程—水利水电工程]