河南城建学院学报2023，Vol.32Issue(6)：30-37,44,9.DOI:10.14140/j.cnki.hncjxb.2023.06.005
地铁站深基坑稳定性监测与数值模拟分析
Stability monitoring and numerical simulation analysis of deep foundation pit in metro station
摘要
Abstract
In order to study the impact of deep foundation pit excavation on the supporting structure and sur-rounding environment,taking Hefei Elements Market Metro Station as the research background,numerical sim-ulation,physical simulation and on-site monitoring methods were used to analyze the deep foundation pit retai-ning structure,internal support and surrounding surface settlement rules.The results show that:the horizontal displacement of the retaining structure gradually shows a"bow-shaped"change pattern as the foundation pit is excavated downwards,reaching a maximum value of 22.3 mm at a depth of 15 m below the ground surface;the settlement value of the surface around the foundation pit shows a"spoon-shaped"change pattern,with a peak settlement value of 15.4 mm,which appears at a distance of 12.5 m from the edge of the foundation pit;the peak value of the support axial force of each layer is between 21％and 58％of the design axial force,and the changes in each indicator are within the safe control range;the lateral displacement of the similar model enve-lope and the soil change pattern are basically consistent with the on-site monitoring values.The supporting structure scheme of the deep foundation pit of this station is reasonable and effective,which can provide theo-retical guidance for the subsequent deep foundation pit support design of Hefei Metro Station.关键词
地铁站深基坑/排桩支护/数值模拟/相似模型/监测量控Key words
station deep foundation pit/pile support/numerical simulation/similar model/monitoring and con-trol分类
建筑与水利引用本文复制引用
刘菁,涂敏,张向阳,罗光财,钱龙..地铁站深基坑稳定性监测与数值模拟分析[J].河南城建学院学报,2023,32(6):30-37,44,9.基金项目
安徽省教育厅高校项目(YJS20210394) （YJS20210394）
