地铁车站明挖深基坑围护结构变形规律分析  

Analysis on Deformation Law of Retaining Structure of Open Excavation Deep Foundation Pit in Metro Station

作　　者：赵鑫[1] 杨美霞 杨昊 宋立伟 ZHAO Xin;YANG Meixia;YANG Hao;SONG Liwei(School of Civil Engineering,Hebei University of Engineering,Handan,Hebei 056038,China;Beijing Urban Construction Rail Transit Construction Engineering Co.,Ltd.,Beijing 100000,China;China Construction Sixth Engineering Bureau Co.,Ltd.,Tianjin 300000,China)

机构地区：[1]河北工程大学土木工程学院,河北邯郸056038 [2]北京城建轨道交通建设工程有限公司,北京100000 [3]中建建筑第六工程局有限公司,天津300000

出　　处：《河北工程大学学报（自然科学版）》2023年第3期24-33,共10页Journal of Hebei University of Engineering:Natural Science Edition

基　　金：河北省自然科学基金资助项目(E2019402395)。

摘　　要：以绍兴地铁2号线车站基坑工程为实例,通过对地连墙水平位移、支撑轴力、地表沉降现场监测数据的分析,得到绍兴地区基坑工程围护结构的相关变形规律并给出相应的控制措施。结果表明:墙体水平位移基本呈内凸型模式,最大侧移在40~60 mm之间,基坑地表沉降呈凹槽形模式,其地表沉降主要集中在50~80 mm左右。地连墙最大侧移δ_(hm)在(0.05%,0.37%)H范围内,平均值为0.21%H;地下连续墙最大侧移点埋深δ_(hm)主要落于(0.69%,0.94%)H范围内;墙后最大地表沉降δ_(hm)范围在(0.01%,0.5%)H内,平均值为0.26%H。Taking the foundation pit project of Shaoxing Metro Line 2 station as an example,by analyzing the on-site monitoring data of the horizontal displacement,support axial force,and surface settlement of the diaphragm wall,the relevant deformation laws of the foundation pit engineering enclosure structures in Shaoxing area are obtained,and the corresponding control measures are provided.The results show that the horizontal displacement of the wall basically follows an inward convex pattern,with the maximum lateral displacement ranging from 40 to 60 mm.The surface settlement of the foundation pit follows a groove shaped pattern,with the surface settlement mainly concentrated around 50 to 80mm.For the maximum lateral displacement of the diaphragm wallδ_(hm) within the range of(0.05%,0.37%)H,the average value is 0.21%H.The maximum lateral displacement point burial depth of the underground continuous wallδ_(hm) mainly falls within the range of(0.69%,0.94%)H.For the maximum surface settlement behind the wallδ_(hm) within the range of(0.01%,0.5%)H,the average value is 0.26%H.

关 键 词：围护结构 变形规律 水平位移 地表沉降 支撑轴力 

分 类 号：TU447[建筑科学—岩土工程]