摘要
研究目的:既有的地铁车站周边常存在后续的商业开发,基坑邻近车站施工会对其结构变形产生不利的影响。本文以天津市天河城购物中心复杂基坑施工为背景,通过三维数值分析,计算基坑的两种开挖方案引起的相邻天津地铁3号线和平路站的沉降值,并评估两种方案对地铁结构安全性的影响,为施工方案的选择提供依据。研究结论:(1)基坑在降水与开挖共同作用下,坑底出现微隆起,基坑周边地表出现沉降槽,地铁车站以沉降变形为主;(2)原方案能更好地控制地铁车站变形,调整方案引起的车站最终沉降略大于原方案;(3)两种方案均能满足地铁变形控制要求,调整方案的工期比原方案减少3个月,经综合比选后推荐采取调整方案;(4)本文根据实际工程进行分析研究,其成果可应用于基坑紧邻地铁施工对既有地铁车站影响的处理。
Research purposes： Subsequent business development often exist around the existing subway station. Foundation pit construction adjacent the station has adverse influence for the structural deformation. Taking the complex foundation pit construction of Tianjin Tianhe Shopping Center as the background, by using three - dimensional numerical analysis, the calculations are made on the settlement value of two foundation pit excavation schemes for Peace Road Station of Tianjin metro line 3, the safety influence of two construction schemes on subway station structure is evaluated, which provides the basis for the selection of construction schemes. Research conclusions： （ 1 ） Under the combined effect of both foundation pit dewatering and excavation, the pit bottom will upheaval slightly, setting tank will appear around the foundation pit, and the subway station is given priority to the settlement deformation. （2）The original scheme can better control the deformation of the subway station. The final settlement caused by the adjusted scheme is slightly larger than the original scheme. （3）Both schemes can meet the control requirements of subway deformation. The construction period of adjustment scheme is reduced 3 months than the original scheme. After comprehensive comparison, the adjusted scheme is recommended. （4）According to the practical engineering for analysis, the study results in this paper can be applied in the treatment of the influence of foundation pit construction adjacent metro station.
出处
《铁道工程学报》
EI
北大核心
2017年第2期93-97,共5页
Journal of Railway Engineering Society
关键词
复杂基坑
调整方案
数值模拟
车站沉降
对比分析
complex foundation pit
the adjusted scheme
numerical simulation
station settlement
comparativeanalysis
