典型软土地层不同端头形式管廊基坑的变形规律
Deformation law of pipe gallery foundation pits with different end forms in typical soft soil layers
詹文兵 1王硕 2汤景林 3王子珺 2杨清源4
作者信息
- 1. 长大市政工程(广东)有限公司,广东 中山,528451
- 2. 北京交通大学 土木建筑工程学院,北京,100044
- 3. 中山翠亨新区工程项目建设事务中心,广东 中山,528400
- 4. 广州番禺职业技术学院 建筑工程学院,广东 广州,511483
- 折叠
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.90º 对称端头、120º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 5.4He(He为基坑开挖深度)、8He、5.3He处趋于稳定,地表沉降分别在距坑角 6He、8.3He、5.7He处趋于稳定,易塌陷区域分别为距坑角 1.0He～6.0He、3.57He～7.57He、2.14He～5.14He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.
Abstract
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 ana-lyzed 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 founda-tion pit enclosure structure of the 90º symmetric end,120º asymmetric end,and 150º asymmetric end pipe gallery gradually increases from the pit angle,and tends to stabilize at 5.4He,8He,and 5.3He(He is the excavation depth of the foundation pit),respectively;the surface settlement of the 90º symmetric end,120º asymmetric end,and 150º asymmetric end pipe gallery foundation pit tends to stabilize after being 6He,8.3He,and 5.7He away from the pit angle,respectively.The range of easily collapsed areas is 1.0He～6.0He,3.57He～7.57He,and 2.14He～5.14He 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.
关键词
软土地层/管廊基坑/基坑变形/坑角效应/端头形式Key words
soft soil stratum/pipe gallery foundation pit/deformation of foundation pit/pit angle effect/end form引用本文复制引用
基金项目
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)
出版年
2024
国家科技期刊平台
NSTL
万方数据