复杂环境下深大基坑逆作法拉森钢板桩支护设计  

Design of Larsen steel sheet pile+internal strut of reversed construction method in retaining and supporting for deep and large foundation pit in complex environment

作　　者：李广 杨泽平[1] 张敏思[1] 程新俊 梁海安[1,2] 胡光阳[1] 曾浩 LI Guang;YANG Zeping;ZHANG Minsi;CHENG Xinjun;LIANG Hai′an;HU Guangyang;ZENG Hao(School of Civil and Architectural Engineering,East China University of Technology,Nanchang 330013,China;State Key Laboratory of Nuclear Resources and Environment,East China University of technology,Nanchang 330013,China)

机构地区：[1]东华理工大学土木与建筑工程学院,南昌330013 [2]东华理工大学核资源与环境国家重点实验室,南昌330013

出　　处：《建筑结构》2021年第22期141-146,108,共7页Building Structure

基　　金：国家自然科学基金地区项目(51864001);中国地震局地震工程与工程振动重点实验室开放研究专项(2020D24)。

摘　　要：为了解决深大基坑在建筑物紧贴、施工空间狭窄、地质条件差等复杂环境下的基坑支护难题,依托某工程实例,结合场地条件及基坑周围环境,分析了该工程的难点,提出了拉森钢板桩墙+逆作法主体结构板水平内支撑+深层水泥搅拌桩隔水帷幕的支护方案,并对支护结构构件进行了计算和设计。结果表明,在进行基坑施工的过程中,基坑周围紧贴建筑物未发生开裂、地面不均匀沉降以及基坑渗漏。基坑支护方案的隔水效果和支护效果都较好,可为类似地区的工程提供经验参考。In order to solve the trouble of deep and large foundation pit support in complex environments such as existing building restrictions,narrow construction space and poor geological conditions,relying on an engineering example,combining the site conditions and the surrounding environment of the foundation pit.The difficulties of the project were analyzed,and the support plan of Larsen steel sheet pile retaining wall+horizontal internal support of main structural plate in reversed construction method+deep cement mixing pile water-proof curtain was proposed.And supporting structural members were calculated and designed.The results show that during the construction of the foundation pit,no cracking,uneven ground settlement and leakage of the foundation pit occurred in the surrounding buildings.The water isolation effect and supporting effect of the foundation pit support scheme are very good,which can provide experience reference for projects in similar areas.

关 键 词：深大基坑 拉森钢板桩 逆作法 基坑支护设计 地下工程 

分 类 号：TU476.9[建筑科学—结构工程]