摘要
随着城市地下空间的发展,在既有地铁隧道旁进行基坑开挖的情况也越来越常见,对于基坑开挖对既有地铁隧道安全运营评估也成为关键问题。针对广州地铁3号线某地铁站附近的基坑工程,采用有限元模拟分析方法,根据由于基坑开挖与降水引起的地铁隧道结构的受力变形,评价基坑开挖对邻近地铁隧道的影响。研究表明,对于临近地铁隧道的基坑支护根据不同区段采用不同的支护方式,既能够保证地铁隧道和周围环境的安全,同时也具有较好的经济性。研究成果对于广州地铁沿线临近地铁隧道的基坑设计、施工和监测具有较好的工程指导意义,可为类似工程提供有益的工程借鉴。
With the development of urban underground space,it is more and more common to carry out foundation pit excavation adjacent to existing metro tunnels.Evaluation of the safety operation for existing metro tunnels has become a key issue.The finite element simulation analysis method is adopted to evaluate the influence of foundation pit excavation on the adjacent subway tunnel according to the stress deformation of the subway tunnel structure caused by foundation pit excavation and dewatering.Analysis results showed that different foundation pit support methods should be adopted based on site conditions of different sessions of the subway tunnels.This is an efficient approach to not only ensure the safety of both the metro tunnel and the surrounding environment but also has a good economic benefit.Using numerical simulation for safety assessment of subway tunnels due to adjacent excavation of foundation pits has great significance in engineering guidance and monitoring,and can provide useful engineering reference for similar projects in Guangzhou.
作者
张旭群
隋耀华
林沛元
ZHANG Xuqun;SUI Yaohua;LIN Peiyuan(Guangzhou Metro Design&Research Institute Co.,Ltd.Guangzhou 510010,China;Southern Marine Science and Engineering Guangdong Laboratory(Zhuhai)Zhuhai 519080,China;School of Civil Engineering,Sun Yat-Sen University Guangzhou 510275,China)
出处
《广东土木与建筑》
2021年第12期41-45,共5页
Guangdong Architecture Civil Engineering
基金
国家自然科学基金(52008408)
广东省基础与应用基础研究基金(2021A1515012088)
广州市科技计划(202102021017)。
关键词
基坑
开挖
地铁隧道
数值模拟
安全运营
foundation pit
excavation
metro tunnel
numerical simulation
safety operation
