超深基坑承压水降排引起的深层土体变形规律研究  

Study on Deformation Law of Deep Soil Caused by Dewatering of Confi ned Water in Ultra Deep Foundation Pit

作　　者：王新新 张学进 蔡永生 WANG Xinxin;ZHANG Xuejin;CAI Yongsheng(Engineering General Institute of Shanghai Construction Group,Shanghai 201114,China;Shanghai Construction Group General Contracting Department,Shanghai 200080,China;SGIDI Engineering Consulting(Group)Co.,Ltd.,Shanghai 200093,China)

机构地区：[1]上海建工集团工程研究总院,上海201114 [2]上海建工集团股份有限公司总承包部,上海200080 [3]上海勘察设计研究院(集团)有限公司,上海200093

出　　处：《建筑施工》2021年第12期2615-2617,2622,共4页Building Construction

摘　　要：针对现有深基坑承压水降排对深层土体变形规律研究较少的问题,结合某深基坑降水开挖施工工况,在减压降水开挖耦合作用下对渗流场及土体变形的影响进行分析,研究了土体分层沉降变化规律及动态降水施工工况下各土层沉降对总沉降的贡献率,明确了降水开挖引起的地表沉降关键性控制土层及位置,为施工预处置提供了科学依据。Aiming at the problem that there is little research on the deformation law of deep soil due to the dewatering and drainage of confined water in deep foundation pit,combined with the construction conditions of dewatering and excavation of a deep foundation pit,the dewatering and excavation,and the effects of seepage field and soil deformation are analyzed under the coupling of decompression,the variation law of soil layered settlement and the contribution rate of each soil layer settlement to the total settlement under the construction condition of dynamic precipitation are studied,and the key control soil layers and locations of surface settlement caused by dewatering and excavation are defined.It provides a scientific basis for construction pretreatment.

关 键 词：深基坑 承压水 地表沉降 变形 

分 类 号：TU753[建筑科学—建筑技术科学]