软弱破碎炭质板岩地层隧道施工受力研究  

Study on tunnel construction stresses in weak and broken carbonaceous slate strata

作　　者：卢颖 易鹏豪 何平[1] 胡跃 刘大华[1] 陈松 张东 Lu Ying;Yi Penghao;He Ping;Hu Yue;Liu Dahua;Chen Song;Zhang Dong(Sichuan Highway and Bridge Construction Group Co.,Ltd.,Chengdu Sichuan 610200,China;Key Laboratory of Transportation Tunnel Engineering of Ministry of Education,Southwest Jiaotong University,Chengdu Sichuan 610031,China)

机构地区：[1]四川公路桥梁建设集团有限公司公路二分公司,四川成都610200 [2]西南交通大学交通隧道工程教育部重点实验室,四川成都610031

出　　处：《山西建筑》2023年第16期133-136,共4页Shanxi Architecture

基　　金：国家自然科学基金项目(No.52278414);国家重点研发计划(No.2019YFC0605104);四川省自然科学基金项目(No.2022NSFSC0424)。

摘　　要：以峨(峨眉)汉(汉源)高速金口河隧道为工程依托,针对炭质板岩地层隧道施工技术难点,采用有限元数值模拟的方法,对炭质板岩地层隧道环形开挖留核心土法开挖与二台阶开挖施工大变形特征进行对比分析,得出了较优的施工方法,并通过现场监测数据分析验证了工法选择的合理性。研究结果表明:采用环形开挖预留核心土法施工方案较二台阶开挖方案,隧道围岩变形最大速率降低了25.8%~34.4%,变形最大值降低了4.81%~8.01%,采用环形开挖预留核心土法施工更加合理;现场监测数据显示采用环形开挖预留核心土法施工是合理的。E(Emei)Han(Hanyuan)Expressway Jinkouhe Tunnel as the basis of the project,for the charcoal slate stratum tunnel construction technology difficulties,using finite element numerical simulation method,the charcoal slate stratum tunnel ring excavation to stay in the core of the soil method of excavation and the two-step excavation construction of the deformation characteristics of the comparative analysis of the construction of a better construction method,and through the field monitoring data analysis to verify the reasonableness of the choice of the work method.The results of the study show that The results of the study show that the maximum deformation rate of the tunnel surrounding rock is reduced by 25.8%~34.4%and the maximum deformation value is reduced by 4.81%~8.01%in the case of the circular excavation and core soil method,which is more reasonable;and the on-site monitoring data show that the construction of the tunnel using the circular excavation and core soil method is reasonable.

关 键 词：隧道工程 大变形特征 炭质板岩 数值模拟 现场监测 

分 类 号：TU457[建筑科学—岩土工程]