施工技术 2012年1月上 24 CONSTRUCTION TECHNOLOGY 第41卷第356期 冻结围护在浅层地表基坑工程中的应用 林秀桂,袁森林 (上海市政工程设计研究总院(集团)有限公司,上海200092) [摘要]在城市繁华中心进行原有地下通道的改造和扩建,通常面临环境复杂、管线密布、交通限制等问题,改造工 程势必影响周围居民正常生活和区域社会功能发挥.通过冻结围护在上海轨道交通3 4号线大统路节点改造工 程的成功应用,总结了浅层地表冻结围护设计和施工控制技术的重要参数,介绍了冻结融沉的影响与控制技术以 及融沉注浆对结构的影响. [关键词]地下工程;基坑;围护;冻结法;注浆孔;融沉 [中图分类号]TU753 [文献标识码]A [文章编号]1002-8498(2012)01-0024-04 Application of Frozen Retaining Structure in Shallow Foundation Excavation Construction Lin Xiugui Yuan Senlin Shanghai Municipal Engineering Design Institute Group)Co. Ld.Shanghai 200092 China) Abstract:Rebuilding and expanding of the original underground passage in the bustling city center always face the plex environment densely pipeline traffic restrictions and other issues.The rebuilding project is bound to affect the normal life of residents and the surrounding social functioning.Through the success application of frozen retaining structure technique in shallow foundation excavation construction in Shanghai Rail Transit Line 3 4 and Datong Road reconstruction some key parameters of design and construction control technique are summed up.Authors introduce effect and control technology of frozen thawing settlement and thaw settlement grouting effect on structures. Key words:underground;foundation excavation;retaining support;freezing method;grouting hole; thawing settlement 人工地层冻结法(artificial ground freezing 1工程概况 AGF)简称“冻结法”,最早由德国工程师F.H. 大统路地道改扩建工程南起天目西路,北至芷 Poetch于1880年提出,是利用人工制冷技术,使地江西路,全长1.26km 如图1所示.地道铁路以南 层中的水结冰,把天...