桩锚支护变形规律及基坑周围变形分析  

Analysis of deformation law of pile anchor support and deformation around foundation pit

作　　者：史康 孙元硕 张伟[1] 魏焕卫[2] Shi Kang;Sun Yuanshuo;Zhang Wei;Wei Huanwei(Shandong Electric Power Engineering Consulting Institute Co.,Ltd.,Jinan 250013,China;College of Civil Engineering,Shandong Jianzhu University,Jinan 250101,China)

机构地区：[1]山东电力工程咨询院有限公司,济南250013 [2]山东建筑大学土木工程学院,济南250101

出　　处：《工程勘察》2021年第10期6-14,共9页Geotechnical Investigation & Surveying

基　　金：国家自然科学基金(41272281).

摘　　要：对基坑开挖过程中的实测数据分析是研究桩锚支护变形的有效方法。本文根据基坑坡顶的水平位移与竖向位移、周边建筑物的沉降数据,讨论了在桩锚支护下基坑降水以及锚索施工对基坑坡顶位移和周边建筑物沉降的影响,并利用统计方法对坡顶的水平位移和竖向位移进行了相关性分析,最后借助PLAXIS 3D有限元软件对基坑开挖进行数值模拟。实测数据以及模拟结果表明:基坑降水对坡顶的竖向位移、周边建筑物沉降影响较大;同时锚索施工也会对基坑坡顶竖向位移、周边建筑物沉降产生一定的影响;基坑坡顶水平位移和沉降呈现非线性关系;数值模拟与实测结果的趋势大体一致,可以为基坑的现场开挖提供一定的参考。It is an effective method to study the deformation of pile anchor support by analyzing the measured data in the process of foundation pit excavation.According to the horizontal displacement and vertical displacement of the slope of foundation,the settlement of surrounding buildings data,the influence of foundation pit dewatering and anchor cable construction on slope top displacement and settlement of surrounding buildings under pile-anchor support are discussed,and the horizontal displacement and vertical displacement of the slope are analyzed by using statistical methods with the numerical simulation and measured data.Finally,the numerical simulation of foundation pit excavation is carried out with the help of PLAXIS 3D finite element software.The measured data and simulation results show that the foundation pit dewatering has a great influence on the vertical displacement of the slope top and the settlement of surrounding buildings.At the same time,the anchor cable construction will also has a certain influence on the vertical displacement of the foundation pit slope top and the settlement of surrounding buildings.The relationship between horizontal displacement and settlement of foundation pit slope top is nonlinear.The trend of the numerical simulation is consistent with the measured results,which can provide some reference for the excavation of the foundation pit.

关 键 词：桩锚支护 水平位移 沉降 相关性 实测数据 

分 类 号：TU443[建筑科学—岩土工程]