深基坑开挖后桩锚支护结构相互作用分析  

Interaction Analysis of Pile-anchor Supporting Structure after Deep Foundation Excavation

作　　者：郑晓国[1] 汪春平 ZHENG Xiaoguo;WANG Chunping(0x09College of Road&Bridge Engineering,Zhejiang Institute of Communications,Hangzhou 311112,China;Hangzhou Municipal Construction Group Co.,Ltd.,Hangzhou 310015,China)

机构地区：[1]浙江交通职业技术学院路桥学院,杭州311112 [2]杭州市市政工程集团有限公司,杭州310015

出　　处：《路基工程》2019年第5期29-34,共6页Subgrade Engineering

基　　金：国家自然科学基金资助项目(41672294)

摘　　要：在基坑开挖过程中,除了要保证基坑自身的稳定性,还要保证相邻建筑物和地下管线等设施的安全,因此,研究深基坑开挖后的变形及土体与支护结构稳定性至关重要。对此,以杭州市某深基坑工程为依托,采用现场监测和数值模拟的方法进行分析,得到基坑开挖后地表沉降、围护结构位移及锚索轴力变化和分布规律,并通过数值模拟对比,得到基坑开挖会对距坑边缘2到3倍开挖深度范围内的地表沉降产生影响,对1倍开挖深度范围内地表沉降影响较大。During excavation of foundation pit,not only its own stability,but also the safety of adjacent structures and underground pipelines,should be guaranteed.Thus the study on the deformation of foundation pit after excavation and the stability of soil mass and supporting structure is important.Relying on a deep foundation pit project in Hangzhou City,how the surface settlement,the displacement of supporting structure,and the axial force of anchor cable change and distribute after the excavation,was found out by means of on-site monitoring and numerical simulation.Through the comparison,it is concluded that excavation of foundation pit may influence the surface settlement within the scope of 2~3 times the excavation depth from the pit edge,and has large impact within the scope of 1 times the excavation depth.

关 键 词：深基坑工程 桩锚支护 基坑监测 锚索轴力 周边地表沉降 

分 类 号：TU46[建筑科学—结构工程]