淤泥覆盖下高强度硬岩地下连续墙成槽技术研究  

Study on Trenching Technology of Underground Diaphragm Wall in Hard Rock with Silt Cover

作　　者：刘钢立 曹东娇 李新龙 张科[2] 郭春[2] LIU Gangli;CAO Dongjiao;LI Xinlong;ZHANG Ke;GUO Chun(Urban Rail Transit Engineering Company Limited of China Railway 15 th Bureau,Luoyang 471002;Key Laboratory of Transportation Tunnel Engineering,Southwest Jiaotong University,Chengdu 610031)

机构地区：[1]中铁十五局集团城市轨道交通工程有限公司,洛阳471002 [2]西南交通大学交通隧道工程教育部重点实验室,成都610031

出　　处：《现代隧道技术》2020年第S01期1283-1287,共5页Modern Tunnelling Technology

基　　金：“十三五”国家重点研发计划(2019YFC0605104);四川省教育科研资助金项目(2018495);成都哲学社会科学规划项目(2019CS107);成都市科技项目(2019-YFYF-00121-SN,2020-RK00-00025-ZF).

摘　　要：广州地铁18号线横沥至番禺广场站区间中段风井工程地表存在较厚的淤泥及淤泥质土,下部覆盖高强度硬岩,强度高达114 MPa。为解决淤泥覆盖下高强度硬岩条件下地连墙成槽作业难题,本文提出4种适合深厚淤泥覆盖下高强度硬岩复杂地质条件的施工方案,通过对比不同设备组合在该地质条件下的成槽效率和成本分析,提出合适的施工工艺及设备组合,可为类似工程提供参考。There is a thick layer of silt and silty soil on the surface of the middle air shaft project between Hengli and Panyu square stations of Guangzhou Metro Line 18,and the lower portion is covered with hard rock with strength of up to 114 MPa.In order to address the problem of diaphragm wall trenching operation in hard rock under silt cover,this paper proposes four construction plans suitable for the complex geological conditions of high strength hard rock under a deep silt cover,and by comparing their trenching efficiency and performing cost analysis of different equipment combinations under the specific geological conditions,the suitable construction technology and equipment combinations are obtained,providing reference for similar projects.

关 键 词：地下连续墙 成槽技术 淤泥土层 高强度硬岩 

分 类 号：TU753[建筑科学—建筑技术科学]