摘要
结合数值模拟和统计分析,研究了太原地区深基坑围护结构变形和地表沉降规律。通过有限元数值模拟研究了影响基坑变形的因素及规律,结合实测结果提出了太原地区深基坑工程的变形控制标准。研究表明:围护结构的最大侧移量和基坑周边地表的最大沉降量随基坑开挖深度的增加近似线性增大,随围护结构插入比的增大逐渐减小。坑外地表沉降主要分布于0≤d/H≤2.5范围内。建议太原地区的基坑工程变形指标可按δ_(hm)/H≤0.15%,δvm/H≤0.25%选取,并严格控制基坑周边1.0H范围内的沉降。对该地区基坑工程的设计与施工有一定的指导意义。
Combined with numerical simulation and statistical analysis,the deformation of diaphragm walls and surface settlement of deep foundation pit in Taiyuan area are analyzed.The factors and rules affecting the deformation are caculated by using finite element numerical simulation.The deformation control standard of deep foundation pit engineering in Taiyuan is determined combined with the measured results.The results are as follows.The maximum lateral displacement of the diaphragm wall and the maximum ground subsidence increase linearly with the increase of excavation depth,and decrease with the increase of insertion ratio.The ground subsidence is mainly distributed in the range of0≤d/H≤2.5.It is suggested that the deformation index of foundation pit in Taiyuan can be selected according toδ_(hm)/H≤0.15%,δ_(vm)/H≤0.25%,and the ground subsidence in the range of 1.0 Haround the foundation pit should be strictly controlled,which has certain guidance for the design and construction of deep foundation pit.
作者
贾霄
张金柱
夏瑞萌
郎瑞卿
JIA Xiao;ZHANG Jinzhu;XIA Ruimeng;LANG Ruiqing(Beijing Urban Construction Design&Development Group Co.,Ltd.,Beijing 100037,China;Key Laboratory of Soft Soil Engineering Character and Engineering Environment of Tianjin,Tianjin 300384,China)
出处
《水利与建筑工程学报》
2021年第6期172-178,共7页
Journal of Water Resources and Architectural Engineering
基金
国家自然科学基金(52008286)
天津市自然科学基金(19JCQNJC06900)。
关键词
深基坑
围护结构
变形特性
数值模拟
统计分析
deep excavation
diaphragm wall
deformation characteristic
numerical simulation
statistical analysis
