大跨铁路隧道拱部预制管片与现浇边墙组合的二次衬砌设计与建造技术  

Design and Construction Technology of Secondary Lining Combined with Vault Prefabricated Segments and Cast-in-situ Side Walls of A Large-span Railway Tunnel

作　　者：周晓军[1] 杨光华 杨昌宇[3] Zhou Xiao-jun;Yang Guang-hua;Yang Chang-yu

机构地区：[1]西南交通大学土木工程学院,成都610031 [2]中国铁路成都局集团有限公司重庆铁路枢纽东环线建设指挥部,重庆400023 [3]中铁二院工程集团有限责任公司,成都610031

出　　处：《建筑技术开发》2021年第23期90-94,共5页Building Technology Development

基　　金：成都铁路局科技研究开发计划项目(CX1873)。

摘　　要：针对矿山法施工的隧道复合式衬砌中二次衬砌拱顶厚度和强度不足的常见质量问题,结合重庆铁路枢纽东环线胡家沟隧道的围岩地质和水文地质条件,对大跨铁路隧道复合式衬砌中由拱顶预制管片和现浇边墙相组合的新型二次衬砌结构开展现场试验,设计了适用于大跨铁路隧道复合式衬砌的二衬拱部预制管片结构及其拼装方法,并给出了拱顶预制管片和边墙现浇衬砌之间的衔接方式与防水措施,同时总结了矿山法施工的大跨铁路隧道由拱顶预制管片和现浇边墙相结合的二次衬砌施工工艺。In view of the common quality problems of insufficient thickness and strength of the secondary lining vault in the composite lining of the tunnel constructed by the mining method,combined with the surrounding rock geology and hydrogeological conditions of the Hujiagou tunnel on the east ring line of the Chongqing railway hub, on-site tests on the new secondary lining structure composed of the vault prefabricated segment and the cast-in-place side wall suitable for large-span railway tunnel composite lining was carried out. The vault prefabricated segment structure of the second lining suitable for the composite lining of the large-span railway tunnel and its assembling method were designed,the connection method and waterproof measures between the vault prefabricated segment and the side wall cast-in-place lining were given. At the same time,construction technology of secondary lining combined with vault prefabricated segments and cast-in-situ side wall of the large-span railway tunnel constructed by the mining method is summarized.

关 键 词：大跨铁路隧道 拱顶预制管片 现浇边墙 衬砌结构设计 

分 类 号：U451[建筑科学—桥梁与隧道工程]