摘要
以软土地区大面积深基坑工程为研究案例,根据实际基坑分区跳挖的开挖方式对基坑进行施工,选取基坑周边5个深层土体侧向位移以及5个周边地表沉降监测数据进行对比分析。经过分析可得:大面积深基坑采用分区开挖的施工方法,对基坑周边深层土体侧向位移与周边地表沉降控制效果较好,深层土体位移最大值均在30mm左右,地表沉降最大值均在10mm左右。通过分析发现基坑降水对基坑周边深层土体变形影响较大,在基坑降水施工时需严格监测基坑变形。研究结果可为类似工程开挖提供借鉴。
In this paper, a large-area deep foundation pit project in soft soil area is taken as a research case. The foundation pit is constructed according to the actual excavation method of foundation pit partition excavation. Five deep soil lateral displacements around the foundation pit and five surrounding surface settlement monitoring data are selected for comparative analysis. Through analysis, it can be obtained that the construction method of partition excavation for large area deep foundation pit has good control effect on the lateral displacement of deep soil around the foundation pit and the surrounding surface settlement. The maximum displacement of deep soil is about 30mm, and the maximum surface settlement is about 10mm. Through analysis, it is found that the dewatering of foundation pit has a great influence on the deformation of deep soil around the foundation pit, and the deformation of foundation pit should be strictly monitored during dewatering construction. The research results can provide reference for similar engineering excavation.
作者
万磊
武永康
刘哲
屈昆
张铎
谢忠
WAN Lei;WU Yongkang;LIU Zhe;QU Kun;ZHANG Duo;XIE Zhong(China Railway First Group Co.Ltd.,Xi’an 710000,China;Zhejiang University of Technology,Hangzhou 310034,China)
出处
《建筑结构》
CSCD
北大核心
2022年第S02期2234-2238,共5页
Building Structure
关键词
深基坑
深层土体变形
地表沉降
分区开挖
deep foundation pit
deep soil deformation
ground subsidence
partition excavation
