海口文明东越江通道施工及变形实测分析  

Analysis on construction and deformation measurement of Wenming East River-crossing Tunnel in Haikou

作　　者：张轶 杨光辉 钟铧炜 陈台礼 陈睿杰 ZHANG Yi;YANG Guanghui;ZHONG Huawei;CHEN Taili;CHEN Ruijie(Shanghai Urban Construction Municipal Engineering(Group)Co.,Ltd.,Shanghai 200065,China;Department of Geotechnical Engineering,Tongji University,Shanghai 200092,China;Key Laboratory of Geotechnical and Underground Engineering of Ministry of Education,Tongji University,Shanghai 200092,China)

机构地区：[1]上海城建市政集团有限公司,上海200065 [2]同济大学地下建筑与工程系,上海200092 [3]同济大学岩土及地下工程教育部重点实验室,上海200092

出　　处：《建筑结构》2023年第15期125-131,共7页Building Structure

基　　金：上海市科委2019年科技攻关计划项目(19511100802)。

摘　　要：以海口文明东越江通道工程为依托,对基坑开挖过程中围堰的变形、基坑变形、基坑周边地表沉降等进行了全过程监测,对围堰明挖基坑过程中围堰及基坑的变形规律进行了分析。结果表明:在砂土与中等硬度黏土的地层条件下,围堰水平变形量为15~45mm,沉降为5.7~25.4mm。围堰变形与基坑变形的分布形态相似,说明围堰的整体变形仍主要受基坑开挖的影响;围堰的沉降存在明显的波动,说明渗流、坑外降水、降雨等水文因素对围堰的变形产生了较大的扰动影响;围堰明挖基坑开挖的影响范围大于常规基坑,说明围堰的存在及水上施工环境对基坑工程产生了明显的影响。Based on Wenming East River-crossing Tunnel in Haikou,the deformation of cofferdam,the deformation of foundation pit and the surface settlement around the foundation pit during the excavation process were monitored.The deformation law of cofferdam and foundation pit in the process of open-cut of foundation pit supported by cofferdam were analyzed.The results show that the horizontal deformation of cofferdam is 15~45mm and the settlement is 5.7~25.4mm under the formation condition of sand soil and medium hardness clay.The distribution pattern of cofferdam deformation is similar to that of foundation pit,indicating that the overall deformation of cofferdam is still mainly affected by foundation pit excavation.The settlement of cofferdam fluctuates obviously,which indicates that hydrologic factors such as seepage flow,precipitation outside the pit and rainfall have great disturbance influence on the deformation of cofferdam.The influence range of open-cut of foundation pit supported by cofferdam is larger than that of conventional foundation pit,which indicates that the existence of cofferdam and the construction environment on water have obvious influence on foundation pit engineering.

关 键 词：钢板桩围堰 越江隧道 明挖法 基坑 变形实测 

分 类 号：TU753.62[建筑科学—建筑技术科学]