深基坑施工对邻近既有地铁车站附属的影响分析
摘要:邻近地铁车站附属进行深基坑施工将会对车站附属结构及地铁运营安全产生影响。以石家庄天河城市下沉广场深基坑施工为背景,通过划分不同的施工阶段,采用MIDAS软件模拟分析该项目施工对邻近车站附属水平及竖向位移的影响,并与监测结果进行对比分析。同时将计算位移叠加至附属结构上验算其配筋及裂缝。结果表明,随着下沉广场施工,车站附属将产生水平及竖向位移,开挖至基坑底部时附属结构的位移最大,附属结构主要以竖向位移为主。通过对既有附属结构进行位移叠加验算后,附属结构配筋、裂缝均满足规范要求。通过模拟计算结果与实际监测结果对比分析,得出各施工工况下附属结构的计算结果与实测结果变形规律大体一致,证明数值模拟计算结果合理可行。
Abstract:The foundation pit excavation near the existing metro station auxiliary structure is expected to have impact on the metro station auxiliary structure and the safe operation. Taking the construction of the deep foundation pit of a Sunken Plaza in Shijiazhuang as the background, by dividing different construction stages, MIDAS software was used to simulate and analyze the impact of the construction on the horizontal and vertical displacements attached to the neighboring stations, and the results were compared with the monitoring results. The calculated displacement is superimposed on the interval tunnel to check its reinforcement and cracks. The results show that: with the construction of the sunken square, the metro station auxiliary structure will produce horizontal and vertical displacement. The displacement of the metro station auxiliary structure reaches the maximum when the excavation reaches the bottom of the foundation pit, and the vertical displacement is mainly. After checking the displacement superposition of the metro station auxiliary structure, the reinforcement and cracks of the interval tunnel meet the requirements of the specification. By comparing the calculated results with the measured results, the deformation law of the calculated results and the measured results under various construction conditions is generally consistent, which proves that the numerical simulation results are reasonable and feasible.
中文标题:
深基坑施工对邻近既有地铁车站附属的影响分析
Impact Analysis of Foundation Pit Excavation Near the Existing Metro Station Auxiliary Structure
作者:
张旭1,,王杰杰2
Zhang Xu1,,Wang Jiejie2
作者简介:张 旭,男,1989年生,河北石家庄人,工学硕士,工程师,主要从事地铁结构设计与有限元模拟工作。E-mail:369803833@qq.com
通讯地址:
1.北京城建设计发展集团股份有限公司,北京 100037 2.河北英博认证有限公司,河北石家庄 050000
1.BeijingUrbanConstructionDesign&DevelopmentGroupCo.,Limited,Beijing100037,China 2.HebeiYingboCertificationCo.,Ltd.,Shijiazhuang050000,Hebei,China
中图分类号:U 231;TU 753
doi:10.3969/j.issn.1007-2993.2023.04.021
出版物:岩土工程技术
收稿日期:2022-06-10
刊出日期:2023-08-08
关键词:深基坑施工,地铁车站附属结构,数值模拟,影响分析
Key words:deep foundation pit excavation,metro station auxiliary structure,numerical simulation,impact analysis
文档包含图片数量:图片(12)张
文档包含表格数量:表格(7)个
参考文献:
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