泥水盾构穿越富水大粒径卵石地层掘进问题及处治措施  

Tunneling Problems and Specific Countermeasures of Slurry Shield Passing Through Water-rich Large Size Pebble Ground

作　　者：邓如勇 雷帅[2] 全雪勇 方勇[1] 

机构地区：[1]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 [2]西南交通大学土木工程学院,四川成都610031 [3]中铁十六局集团有限公司,北京100018

出　　处：《施工技术》2018年第5期86-91,共6页Construction Technology

基　　金：国家自然科学基金项目(51278422;51578460);"十二五"国家科技支撑计划课题项目(2012BAG05B03);四川省青年科技基金项目(2012JQ0021)

摘　　要：兰州地铁1号线I期工程两次下穿黄河,下穿黄河段地层具有卵石含量高、漂石粒径大、地层渗透系数大、地层胶结性差等特点。下穿黄河段盾构施工一直被视为1号线建设的控制性工程,决定着工期,关系着兰州地铁工程建设的成败。通过回顾兰州地铁1号线迎门滩—马滩区间右线下穿黄河过程中遇到的若干施工难题及处治措施,包括刀盘卡住处理措施、掌子面塌方处理措施、卵石积舱滞排处理措施、机械故障处理措施以及刀盘改造措施等。系统总结了盾构在强透水大粒径卵石地层中掘进遇到上述问题的处理思路和方法。According to the design document,the first phase project of Lanzhou Subway line 1 needs to pass twice under Yellow River,where the ground is characterized by high hard cobble content,large size of boulder content,high permeability and weak cementation. Tunneling under Yellow River has been regarded as the key project of Lanzhou Subway line 1,which depends the time limit as well as the success or failure of the project. This paper reviews the construction difficulties and summarizes some specific countermeasures during the shield crossing under Yellow River. It mainly includes problems and countermeasures for cutter-head seized up,for tunnel face collapse,for pebble trapped in chamber,for mechanical failure and cutter-head reconstruction scheme. Then this paper summarizes the thoughts and methods for solving problems in the tunneling process.

关 键 词：隧道工程 盾构 掘进 大粒径卵石地层 施工技术 

分 类 号：U455.43[建筑科学—桥梁与隧道工程]