软弱土层深基坑降水工程施工技术研究  

Study on Construction Technology of Deep Foundation PitDewatering Project in Soft Soil

作　　者：张睿强 Ruiqiang Zhang(The 20th Bureau Group of China Railway First Engineering Co.,Ltd.Suzhou,Jiangsu,215151,China)

机构地区：[1]中铁二十局集团第一工程有限公司,江苏苏州215151

出　　处：《工程技术与管理（新加坡）》2020年第1期26-29,共4页Engineering Technology & Management

摘　　要：以中国苏州市轨道交通5号线星塘街车站为背景,根据项目施工特点,针对软土地层深基坑工程,对围护结构隔断基坑内外水力联系的地下含水层采用管井进行疏干降水;对围护结构未隔断基坑内外水力联系的承压水含水层,采用管井分层分别进行减压降水;基坑降水对坑外水位影响较大时采用回灌井对地下进行回灌,减少对坑外周边环境的影响。论文讨论了对深基坑疏干降水、减压降水及回灌地下水的管井设计,以及施工过程中各种类型管井的运行状况;通过现场效果,总结深基坑降水工程的理论与实践技术方法。With the background of Xingtang Street Station of Line 5 in Suzhou,based on the construction characteristics of the project,this paper aims at the deep foundation pit project in soft soil layer,the underground aquifer with hydraulic connection inside and outside the foundation pit is separated by pipe wells for dredging precipitation.For confined water aquifers that are not hydraulically connected to the inside and outside of the foundation pit,the piped wells are used for decompression and precipitation when the foundation pit precipitation has a large impact on the water level outside the pit.Recharge wells are used to recharge the ground and reduce the impact on the surrounding environment outside the pit.This paper discusses the design of tube wells for dredging precipitation,decompression precipitation,and recharging groundwater in deep foundation pits,as well as the operation status of various types of tube wells during construction.Based on field effects,the theoretical and practical technical methods of deep foundation pit precipitation engineering are summarized.

关 键 词：基坑降水 疏干降水 减压降水 地下水回 

分 类 号：TU7[建筑科学—建筑技术科学]