摘要
针对施工过程中,基坑工程因各种原因长期停工而处于超期服役的问题。以湖南文化广场二期深基坑工程为例,利用ABAQUS有限元软件进行数值模拟,得到影响超期服役基坑变形规律的关键因素。研究结果表明:地面荷载对基坑开挖全阶段均有影响,嵌固深度对基坑复工后开挖阶段影响较为明显,开挖深度仅影响停工前开挖阶段。支护桩桩顶水平位移趋于平稳时,停工时长对基坑开挖各阶段的影响不大。基于研究结果,提出了超期服役基坑安全的优化方法。
During the construction process,many foundation pit projects are in the state of shutdown due to various reasons.In order to study the key factors affecting the deformation law of the overdue foundation pit.A series of numerical simulations are conducted by using ABAQUS software taking the 2nd phase of the deep foundation pit in Hunan cultural square as an example.Simulation results indicate that the ground load has influence on the deformation during the whole stage of foundation pit excavation.The influence of the embedment depth on the deformation is obvious during the excavation stage after the foundation pit is resumed.The excavation depth only affects the deformation during the excavation stage before the shutdown.The duration of shutdown has little effect on the deformation.Based on the research results,the optimization method for safe excavation of the overdue foundation pit is proposed.
作者
门彬
MEN Bin(China Railway Urban Construction Group Co.,Ltd.,Changsha 410000,China)
出处
《交通科学与工程》
2020年第3期50-55,共6页
Journal of Transport Science and Engineering
关键词
基坑
超期服役
数值模拟
变形规律
foundation pit
overtime service
numerical simulation
deformation law
