软土地区异形深基坑围护设计及施工技术研究  

Study on Design and Construction Technology for Special-Shaped Deep Foundation Pit Excavation Support in Soft Soil Area

作　　者：戴伟 DAI Wei(Shanghai Waigaoqiao Free Trade Zone Group Co.,Ltd.,Shanghai 200137,China;Shanghai Engineering Research Center of City Trenchless Construction,Shanghai 200002,China)

机构地区：[1]上海外高桥集团股份有限公司,上海200137 [2]上海城市非开挖建造工程技术研究中心,上海200002

出　　处：《建筑施工》2018年第4期476-478,共3页Building Construction

基　　金：上海市科学技术委员会科研项目(18DZ2283100)

摘　　要：上海外高桥某超大异形深基坑工程紧邻运营中的地铁高架线,故其基坑变形是需要重点控制的因素。结合工程实际,从分坑的方式、支撑体系等对异形深基坑的施工方法进行了分析及研究。最后通过对分区后的不同基坑采取针对性的开挖方式及围护形式,较好地控制了基坑的变形和对地铁高架线的影响,为今后类似工程积累了经验。One super-large special-shaped foundation pit project in Shanghai Waigaoqiao is closely adjacent to operating subway elevated line. Therefore, the foundation pit deformation is a key factor that needs to be controlled. Based on the engineering practice, the construction methods of special-shaped deep foundation pit have been analyzed and studied by means of pit partition scheme, excavation support system and so on. Finally, after through pit-partition, the targeted excavation methods and support forms have been adopted in the different foundation pits, which achieved a better control over the deformation of foundation pit and the impact on the subway elevated line and accumulated experience for similar projects in the future.

关 键 词：超大异形深基坑 分坑施工 双圆环支撑 土方开挖 变形控制 

分 类 号：TU753[建筑科学—建筑技术科学]