摘要
岩溶隧道衬砌结构长期处于水压和围岩压力的共同作用下,受降雨影响,岩溶隧道水压随时间波动较大。因此,开展岩溶隧道荷载实测并评估隧道衬砌结构的安全性对类似工程的优化设计具有参考价值。文章依托西昆高铁某隧道,采用现场监测的方法对隧道围岩压力及水压进行监测,分析了典型荷载组合作用下衬砌结构的安全性。研究结果表明:(1)受地表降雨的影响,岩溶隧道水压在短时骤增,在长期排水条件下,衬砌仰拱仍然承受一定程度的水压。(2)隧道初期支护与二次衬砌之间的接触压力监测值呈现非对称分布,等效后的均布荷载值较规范值小。(3)在水压和围岩压力共同作用下,隧道衬砌结构的安全性满足要求,且具有一定的安全余量。
The lining structure of karst tunnels is subjected to the combined action of water pressure and rock pressure for a long time.Under the influence of rainfall,the water pressure in karst tunnels fluctuates greatly over time.Therefore,it is of great value to conduct load measurement and assess the safety of tunnel lining structures for similar projects by evaluating the safety of tunnel lining structures under typical load combinations.Based on a certain tunnel of the Xi-Kun High Speed Railway,this paper uses the method of on-site monitoring to monitor the rock pressure and water pressure of the tunnel,and analyzes the safety of the lining structure under typical load combinations.The research results show that:(1)Under the influence of surface rainfall,the water pressure of karst tunnel increases rapidly in a short time.Under long-term drainage conditions,the lining invert still bears a certain degree of water pressure.(2)The contact pressure monitoring values between the initial support and the secondary lining of the tunnel show an asymmetric distribution,and the equivalent uniform load value is smaller than the design value.(3)Under the combined action of water pressure and rock pressure,the safety of the tunnel lining structure meets the requirements and has a certain safety margin.
作者
张文
赵东平
和琦
杜卿
刘超
李海军
ZHANG Wen;ZHAO Dongping;HE Qi;DU Qing;LIU Chao;IL Haijun(China Railway 11th ureau Group Co.,Ltd.,Wuhan 430061;School of Civil Engineering,Southwest Jiaotong University,Chengdu 610031;China Railway Second Institute of Chongqing Survey and Design Co.,Ltd.,Chongqing 400000)
出处
《现代隧道技术》
CSCD
北大核心
2024年第S01期862-872,共11页
Modern Tunnelling Technology
基金
国家自然科学基金高铁联合基金(U2034205)
关键词
岩溶隧道
围岩压力
水压
现场监测
衬砌结构
安全性
karst tunnel
surrounding rock pressure
water pressure
on-site monitoring
lining
safety
作者简介
张文(1988-),男,工程师,主要从事隧道施工技术管理工作,E-mail:343202208@qq.com;通讯作者:赵东平(1979-),男,博士,副教授,主要从事隧道与地下工程研究工作,E-mail:704215958@qq.com.
