摘要
近年来随着城市的经济快速发展与规模的不断壮大,城市轨道交通迅速发展,地铁车站深基坑的施工难度在不断增加,由设计或施工的问题而引发的深基坑失稳的安全事故时有发生。本文是在福州地铁4、5号线"L"型换乘车站洪塘路站深基坑施工的背景下,以数值模拟与现场监测相结合的形式,探究洪塘路站深基坑工程中的受力变形规律,分析其在施工过程中的稳定性。结果表明:基坑分区开挖施工同时在换乘节点封堵墙外侧预留土体提供侧压力,对换乘节点基坑围护结构变形和地表沉降均具有一定抑制作用;在设计工况下,基坑在整个开挖施工过程中支护结构受力变形和周围地表沉降量均未超出设计允许值,整体稳定性良好。
In recent years,due to the rapid development of urban economy and the rapid scale of urban rail transit continuous expansions,the construction difficulties of deep foundation pit of subway stations are increasing,and the safety accidents of deep foundation pit instability caused by design or construction problems are common.In this paper,under the background of the construction of the deep foundation pit of Hongtang road station of Fuzhou metro line 4 and line 5,the paper explores the stress deformation of Hongtang road station deep foundation pit engineering,and analyzes its stability in the construction process by combining numerical simulation with field monitoring.The results show that the excavation of foundation pit partition construction with the transfer node sealing wall outside the reserved soil which provides lateral pressure,has a certain inhibitory effect on the deformation of retaining structure and surface settlement of the foundation pit.Considering the design condition,the stress deformation of the supporting structure and the surrounding surface settlement in the whole excavation process of the foundation pit do not exceed the design allowable value,and the overall stability is satisfied.
作者
邓能伟
胡修玉
赵星
郭卫杰
王涛
DENG Neng-wei;HU Xiu-yu;ZHAO Xing;GUO Weijie;WANG Tao(Urban Rail Transit Engineering Branch of China Railway Fourth Bureau Group Co.,Ltd.,Hefei 230000,China;Anhui University of Science and Technology Huainan 232001,China)
出处
《地基处理》
2021年第1期48-56,共9页
Journal of Ground Improvement
关键词
基坑开挖
数值模拟
现场实测
foundation pit excavation
numerical simulation
field measurement
