摘要
为研究软土区不同端头形式管廊基坑的变形规律,以典型软土区中山科学城管廊深基坑工程为背景,分析基坑围护结构的水平位移和地表沉降的变化规律。研究表明:围护结构的水平位移自坑角起逐渐增大,最终趋于稳定。基坑周围存在易塌陷区域,地表沉降自坑角起先增大后减小,最终趋于稳定。90°对称端头、120°非对称端头和150°非对称端头形式管廊基坑围护结构的水平位移均自坑角起逐渐增大,分别在距坑角5.4H_(e)(H_(e)为基坑开挖深度)、8H_(e)、5.3H_(e)处趋于稳定,地表沉降分别在距坑角6H_(e)、8.3H_(e)、5.7H_(e)处趋于稳定,易塌陷区域分别为距坑角1.0H_(e)~6.0H_(e)、3.57H_(e)~7.57H_(e)、2.14H_(e)~5.14H_(e)处,研究结果为软土区管廊基坑施工过程中控制基坑变形提供参考。
In order to study the influence of different end forms on the deformation of foundation pits in soft soil areas,the horizontal displacement and surface settlement laws of the foundation pit enclosure structure were analyzed based on the typical deep foundation pit project of Zhongshan Science City Pipe Gallery in soft soil areas.The results show that the horizontal displacement of the enclosure structure gradually increases from the pit angle and then tends to stabilize;the surface settlement around the foundation pit first increases and then decreases from the pit angle before stabilizing,and there are areas prone to collapse;the horizontal displacement of the foundation pit enclosure structure of the 90°symmetric end,120°asymmetric end,and 150°asymmetric end pipe gallery gradually increases from the pit angle,and tends to stabilize at 5.4H_(e),8H_(e),and 5.3H_(e)(H_(e) is the excavation depth of the foundation pit),respectively;the surface settlement of the 90°symmetric end,120°asymmetric end,and 150°asymmetric end pipe gallery foundation pit tends to stabilize after being 6H_(e),8.3H_(e),and 5.7H_(e) away from the pit angle,respectively.The range of easily collapsed areas is 1.0H_(e)~6.0H_(e),3.57H_(e)~7.57H_(e),and 2.14H_(e)~5.14H_(e) away from the pit angle,respectively.The research results provide a reference for controlling the deformation of foundation pit during the construction of pipe gallery foundation pit in soft soil area.
作者
詹文兵
王硕
汤景林
王子珺
杨清源
ZHAN Wenbing;WANG Shuo;TANG Jinglin;WANG Zijun;YANG Qingyuan(Poly Changda Engineering(Guangdong)Company Limited,Zhongshan 528451,China;School of Civil Engineering,Beijing JiaoTong University,Beijing 100044,China;Zhongshan Cuiheng New Area Engineering Project Construction Affairs Center,Zhongshan 528400,China;School of Architecture and Engineering,Guangzhou Panyu Polytechnic,Guangzhou 511483,China)
出处
《辽宁工程技术大学学报（自然科学版）》
CAS
北大核心
2024年第4期434-442,共9页
Journal of Liaoning Technical University (Natural Science)
基金
国家自然科学基金面上项目(52272341)
翠亨新区起步区科学城项目(CD28KXC-2022-D-027)。
关键词
软土地层
管廊基坑
基坑变形
坑角效应
端头形式
soft soil stratum
pipe gallery foundation pit
deformation of foundation pit
pit angle effect
end form
