大型地铁车站主体结构运营期安全分析与 安全监测方案设计
江中华
Safety Analysis and Safety Monitoring Scheme Design of Large Metro Station Main Structure During Operational Period
JIANG Zhonghua
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作者信息:中铁第四勘察设计院集团有限公司，430063，武汉∥高级工程师
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Affiliation:China Railway Siyuan Survey and Design Group Co., Ltd., 430063, Wuhan, China
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关键词:
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Key words:
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DOI:10.16037/j.1007-869x.2022.01.013
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中图分类号/CLCN:U231+4;X951
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栏目/Col:研究报告
摘要:
针对武汉复兴路地下车站主体结构的运营安全问题，采用三维全尺寸模型精细化数值分析手段，研究了运营期不同边界条件和不利荷载工况下的结构力学响应。研究表明：地基加固处理不当将诱发楼板和纵梁出现局部沉降过大问题，立柱间的最大差异沉降增加43%；降水、高层建筑修建等地表超载工况下顶板沉降增加33%，总沉降达51.9 mm，地表超载不应超过设计超载值；局部发育的溶洞对车站主体结构受力及变形力影响较小，可以忽略。结合设计状态和极端工况下的结构受力性能分析结果，探明了运营期需重点关注的结构受力薄弱部位、变形显著区段及监测指标，制定了各指标的控制和预警标准。
Abstracts:
For the operational safety of the main structure of Wuhan Fuxing Road underground station, the structural mechanical response with different boundary conditions and unfavorable loading conditions during the operational period is studied by means of refined numerical analysis using a three-dimensional full-size model. The study shows that: improper foundation reinforcement treatment will induce excessive local settlement of floor slabs and longitudinal beams, and the maximum differential settlement between columns increases by 43%; the top slab settlement increases by 33% in condition of ground surface overload such as precipitation and construction of high-rise buildings, and the total settlement reaches 51.9 mm, while the ground surface overload should not exceed designed overload value; the locally developed cavities have insignificant effect on the force and deformation force on the main structure of the station, thus it can be overlooked. Combining the results of the structural force performance analysis at design stage and under extreme working conditions, the parts of structural force weakness, significant deformation zones and monitoring indexes that require emphatical attention during the operational period are identified, and the control and early warning standards for each index are formulated.
引文 / Ref:
江中华.大型地铁车站主体结构运营期安全分析与安全监测方案设计[J].城市轨道交通研究，2022，25（1）：63.
JIANG Zhonghua.Safety Analysis and Safety Monitoring Scheme Design of Large Metro Station Main Structure During Operational Period[J].Urban mass transit，2022，25（1）：63.
JIANG Zhonghua.Safety Analysis and Safety Monitoring Scheme Design of Large Metro Station Main Structure During Operational Period[J].Urban mass transit，2022，25（1）：63.
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