富水公路隧道抗水压衬砌结构安全评价研究  

Research on Safety Evaluation of Water Pressure Resistant Lining Structure of Highway Tunnel in Water-Rich District

作　　者：吴梦军[1] 钟祖良[2] 王益 方林[1] Wu Mengjun;Zhong Zuliang;Wang Yi;Fang Lin(China Merchants Chongqing Communications Technology Research&Design Institute Co.,Ltd.,Chongqing 400000,P.R.China;School of Civil Engineering,Chongqing University,Chongqing 400045,P.R.China)

机构地区：[1]招商局重庆交通科研设计院有限公司,重庆400000 [2]重庆大学土木工程学院,重庆400045

出　　处：《地下空间与工程学报》2023年第5期1646-1655,共10页Chinese Journal of Underground Space and Engineering

基　　金：公路隧道国家工程实验室基金(NELFHT201901);重庆市科委自然科学基金基础与前沿研究计划项目(cstc2013jcyjA30005)。

摘　　要：地下水作用下公路隧道衬砌结构耐久性与安全性问题突出,运营期间易发生衬砌渗漏、开裂和脱落等现象。为了更好地评价富水公路隧道抗水压衬砌结构的安全性,基于《公路隧道设计规范》相关条款开展荷载组合下衬砌截面强度验算,对衬砌外水压力进行了分级。在此基础上,基于荷载结构法采用数值模拟开展了不同断面大小、围岩级别和埋深条件下隧道衬砌结构安全系数随外水压力的变化规律研究,提出了隧道抗水压衬砌结构分级标准。基于外水压力分级和抗水压衬砌结构等级划分,提出了抗水压衬砌结构设计方法和衬砌结构安全评价方法,为相关工程提供参考。Under the influence of groundwater,the durability and safety of highway tunnel lining structures are prominent,and the linings are prone to leakage,cracking and falling off during operation.In order to evaluate the safety of the water-pressure resistant lining structure of highway tunnels in water-rich district,check calculation of the lining section strength under the load combination is carried out based on the relevant clauses of the Specifications for Design of Highway Tunnels,and the external water pressure of the lining is classified.On this basis,the classification standard of tunnel external water pressure resistant lining structure is proposed based on the load structure method with the external water pressure under the conditions of different section sizes,surrounding rock grades and burial depths.Based on the classification of external water pressure and water pressure resistant lining structure,the design method of water pressure resistant lining structure and the safety evaluation method of lining structure are proposed to provide reference for related projects.

关 键 词：公路隧道 外水压力 抗水压衬砌 安全评价 

分 类 号：U459.2[建筑科学—桥梁与隧道工程]