紧邻既有建筑地铁车站超深基坑施工沉降控制技术  

Existing Metro Station Settlement Control Due to the Adjacent Deep Excavations

作　　者：刘秀 赵猛 魏兵超 孟益平[3] 祝金龙[3,4] LIU Xiu;ZHAO Meng;WEI Bingchao;MENG Yiping;ZHU Jinlong(Hefei Transit Group Co.Ltd.,Hefei 230001;Beijing Anjie Engineering Consulting Co.Ltd.,Beijing 100001;Hefei University of Technology,Hefei,230009;Anhui University of Science and Technology,Huainan 232001)

机构地区：[1]合肥市轨道交通集团有限公司,合肥230001 [2]北京安捷工程咨询有限公司,北京100001 [3]合肥工业大学,合肥230009 [4]安徽理工大学,安徽淮南232001

出　　处：《土工基础》2023年第3期382-386,共5页Soil Engineering and Foundation

摘　　要：随着城市的发展,在建筑密集区修建基坑越来越普遍,基坑建设中如何保证周边建筑的安全成为了工程是否能够顺利进行的重要前提,复杂的环境对于基坑工程,特别是超深基坑工程的施工控制提出了更高的要求。正在修建的合肥北一环地下四层车站超深基坑工程周边环境复杂,安全等级为一级,针对周边建筑林立的环境,提出了相应的施工控制对策,按“分层、分段、平衡”进行开挖,采用地连墙进行围护,内部设置五道支撑结构,施工严格按照施工工序进行,监测结果显示,建筑的倾斜率和沉降值均不超过规定的容许值,处于安全稳定状态,车站建设时相应的施工对策有效的保护了周边的建筑物。With the urban development,the deep excavations in the densely populated urban areas are increasingly common and ensuring the safety of surrounding buildings in the deep excavation process has become an important premise of engineering projects.Because of this,the large deep excavation project needs more strictive requirements for the construction control in the complex environment.The Hefei North First-Ring Underground Station is a four-floor structure with complicated adjacent building environment,and the safety level is classified as Level I.Considering that there are many buildings around it,the corresponding construction control measures are proposed in this paper.The foundation pit was excavated by layers,in a segmental and balanced way.The excavated areas are supported by the diaphragm wall with five layers of internal struts.The entire excavation process was performed in the strict construction considerations.The monitoring results showed that the tilting rate and the settlement of the buildings which were in the safe and stable state and all of them didn’t exceed the tolerance values.The surrounding buildings were well protected by the corresponding construction measures.

关 键 词：超深基坑 周边建筑 沉降 控制对策 

分 类 号：TU473[建筑科学—结构工程]