既有桩基对桩锚支护结构受力性状的影响分析  

Analysis of the Influence of Existing Pile Foundation on the Mechanical Behavior of Pile-anchor Supporting Structure

作　　者：张军 赵爱华 黄志鹏 ZHANG Jun;ZHAO Aihua;HUANG Zhipeng(Changsha University of Science and Technology,Changsha,Hunan 410000,China)

机构地区：[1]长沙理工大学土木工程学院,湖南长沙410000

出　　处：《水利与建筑工程学报》2024年第1期119-125,共7页Journal of Water Resources and Architectural Engineering

基　　金：国家自然科学基金(51878074)。

摘　　要：为了深入了解既有建筑物桩基对基坑桩锚支护结构的受力变形特性,采用工程实测与数值分析相互论证的方法,结合长沙县某建筑基坑工程,借助midas GTS软件建立模型,从建筑物桩基长度、建筑物桩基与基坑边缘的距离、建筑物桩基荷载三个因素考虑对桩锚支护结构受力特性的影响。研究结果表明:当桩长小于基坑开挖深度时,支护桩身的位移和沉降值随着桩长的减小而显著增加;建筑物桩基与基坑边缘距离越远,支护桩的水平位移、地表沉降以及桩身弯矩则越小;建筑物桩基荷载增加会引起支护桩身水平位移和桩身弯矩的增大,且在一定范围内增长幅度呈线性关系。In order to gain a deeper understanding of the stress and deformation characteristics of existing building pile foundations on foundation pit pile anchor support structures and summarize the rules,a mutual demonstration method of engineering measurement and numerical analysis was adopted.Combined with a construction foundation pit project in Changsha County,a model was established using midas GTS software.From the length of building pile foundations,the distance between building pile foundations and the edge of the foundation pit consider the influence of three factors on the mechanical characteristics of pile anchor support structures based on the load of building pile foundations.Research has shown that when the pile length is less than the excavation depth of the foundation pit,the displacement and settlement values of the support pile body significantly increase with the decrease of pile length.The farther the distance between the building pile foundation and the edge of the foundation pit,the smaller the horizontal displacement,surface settlement,and pile bending moment of the support pile.An increase in the load on building pile foundations will cause an increase in the horizontal displacement and bending moment of the supporting pile body,and the growth rate is linear within a certain range.

关 键 词：桩锚支护 建筑物桩基 受力性状 数值分析 基坑工程 

分 类 号：TU473.2[建筑科学—结构工程]