市政技术2024，Vol.42Issue(3)：110-116,7.DOI:10.19922/j.1009-7767.2024.03.110
岩溶地区基坑开挖桩锚支护结构变形与稳定性影响研究
Study on the Influence of Deformation and Stability of Pile-anchor Support Structure for Foundation Pit Excavation in Karst Area
摘要
Abstract
In order to study the influence of the cavern on the excavation and stability of extra-long anchor cable supported foundation pit,the foundation pit of Phase Ⅱ of Baiyun Station in Guangzhou was taken as the research object.A 3D model was established by the finite element software Plaxis 3D to simulate the width of the cavern,the distance of the cavern from the beginning of the anchorage section,and the distance of the cavern from the diaphragm wall.Being the indexes,the horizontal displacement along the depth of diaphragm wall was analyzed.The results show that when the width of the cavern increases or the distance of the cavern from the beginning of the anchoring section and the distance of the cavern from the diaphragm wall decreases,it has a greater influence on the deforma-tion of the foundation pit and the deformation amplitude is larger so it is necessary to carry out the reinforcement for the cavern and monitor the deformation of the pit in time;Under the opposite conditions,the influence on the defor-mation of the pit is weakened;When the width decreases or the distances increases to a certain degree,it almost has no influence on the deformation of the foundation pit.Therefore,that study and analysis of the surrounding caverns and pre-treatment before construction will be beneficial to the stability of foundation pit to carry out foundation pit excavation in the more developed cavern areas.关键词
溶洞/基坑开挖/桩锚支护/变形/稳定性Key words
cave/pit excavation/pile-anchor support/deformation/stability分类
土木建筑引用本文复制引用
谢红,陈灶金,黄勤,林钊睿,丁海滨..岩溶地区基坑开挖桩锚支护结构变形与稳定性影响研究[J].市政技术,2024,42(3):110-116,7.基金项目
江西省自然科学基金-揭榜挂帅项目(20223BBG71018) （20223BBG71018）
