基于一次二阶矩法的水工隧洞围岩稳定可靠度研究  

Study on Stability Reliability of Surrounding Rock of Hydraulic Tunnel Based on First-Order Second-Moment Method

作　　者：黄逸军 曹凯敏 杨英权 HUANG Yi-jun;CAO Kai-min;YANG Ying-quan(Huzhou Nantaihu Water Conservancy Hydropower Survey Design Institute Co.Ltd.,Zhenan Branch,Wenzhou 325000,Zhejiang,China;Zhejiang Zhonghong Design Consulting Co.Ltd.,Hangzhou 310000,China)

机构地区：[1]湖州南太湖水利水电勘测设计院有限公司浙南分公司,浙江温州325000 [2]浙江中泓设计咨询有限公司,杭州310000

出　　处：《水利科技与经济》2023年第6期43-48,共6页Water Conservancy Science and Technology and Economy

摘　　要：针对水工隧洞围岩稳定可靠度,提出基于一次二阶矩法的水工隧洞围岩稳定可靠度研究方法,对围岩稳定可靠度与围岩-衬砌联合承载稳定可靠度进行分析,解决传统方案中结构模拟困难、数据表达复杂等问题。结果表明,一次二阶矩法相较于蒙特卡洛法具有更高的准确性;圆形截面具有最高的围岩稳定可靠度,其次是马蹄形截面隧洞。结合施工成本和施工环境等问题综合考量,马蹄形截面隧洞的综合评价最高,更适合实际施工。In view of the reliability analysis of surrounding rock stability of hydraulic tunnels,a research method of stability reliability of surrounding rock stability of hydraulic tunnels based on the first order second moment method is proposed to analyze the reliability of surrounding rock stability and the reliability of the combined bearing capacity of surrounding rock and lining,which solves the problems of difficult structural simulation and complex data representation in traditional schemes.The results show that the first order second moment method is more accurate than the Monte Carlo method.The round section has the highest stability reliability of surrounding rock,followed by the horseshoe section tunnel.Considering the construction cost and construction environment,the horseshoe section tunnel has the highest comprehensive evaluation and is more suitable for actual construction.

关 键 词：水工隧洞 围岩 可靠度 一次二阶矩 有限元分析 

分 类 号：TV223[水利工程—水工结构工程]