青岛地铁浅埋隧道动力增载位移响应比围岩稳定性分析  

Dynamic load increasing displacement response ratio analysis of surrounding rock stability of shallow buried tunnel in Qingdao Metro

作　　者：孟凡迪 贺可强[1] 杨文祥 MENG Fandi;HE Keqiang;YANG Wenxiang(School of Civil Engineering,Qingdao University of Technology,Qingdao 266525,China)

机构地区：[1]青岛理工大学土木工程学院,青岛266525

出　　处：《青岛理工大学学报》2023年第4期57-63,145,共8页Journal of Qingdao University of Technology

基　　金：山东省自然科学基金重点项目(ZR2020KE004);自然资源部滨海城市地下空间地质安全重点实验室开放基金项目(BHKF2021Y05);三峡库区地质灾害教育部重点实验室(三峡大学)开放基金项目(2017KDZ03)。

摘　　要：为防止地表沉降引起隧道事故的发生,以青岛地铁4号线福州路车站为研究对象,运用现场施工的监测数据与MIDAS/GTS NX模拟软件,对青岛地铁浅埋隧道施工沉降规律及围岩稳定性进行了系统研究。在分析地质勘察资料、众多沉降数据和超前地质预报的基础上,分别建立了不同水位环境下的渗流-应力耦合模型,分析了其在地表和拱顶的沉降规律,确定了最大沉降位置即最不利位置。最后,运用动力增载位移响应比对隧道开挖引起的围岩稳定性进行了评价,为今后该类地下工程设计与施工提供了借鉴。In order to prevent tunnel accidents caused by surface settlement,this study takes Fuzhou Road Station of Qingdao Metro 4 as the research object and systematically investigates the construction settlement law and surrounding rock stability of Qingdao Metro shallow buried tunnel by using the on-site construction monitoring data and MIDAS/GTS NX simulation software.Based on the analysis of geological exploration data,settlement data and advanced geological prediction,the seepage stress coupling models under different water levels are established respectively,the settlement law of the surface and vault is analyzed,and the maximum settlement position(the most unfavorable position)is determined.Finally,the stability of surrounding rock caused by tunnel excavation is evaluated by using the dynamic loading displacement response ratio,which provides a reference for the design and construction of this kind of underground engineering in the future.

关 键 词：地表沉降 渗流-应力耦合 动力增载位移响应比 浅埋隧道 数值模拟 

分 类 号：U455[建筑科学—桥梁与隧道工程]