青岛地铁浅埋隧道沉降规律及优化措施分析

Analysis on Settlement Law and Optimization Measures of Shallow-buried Tunnel of Qingdao Metro

为防止地表沉降引发隧道事故,以青岛地铁4号线福州路车站为研究对象,运用现场监测数据与Midas GTS NX模拟软件,对青岛地铁浅埋隧道施工沉降规律和控制优化措施进行了系统研究。在分析地质勘查资料、沉降数据和超前地质预报的基础上,得到了影响隧道稳定性的因素及该区段的沉降规律;通过建立不同水位环境下的渗流-应力耦合模型,分析了其在地表的沉降规律,确定了最大沉降位置即最不利位置并进行了合理优化,为类似地下工程设计与施工提供参考。

In order to prevent tunnel accidents caused by the ground surface settlement,taking Fuzhou road station of Qingdao metro line 4 as the research object,the systematic research is conducted on the settlement law and control optimization measures of the shallow-buried tunnel construction of Qingdao metro by using the on-site monitoring data and Midas GTS NX simulation software.Based on the analysis of geological exploration data,settlement data,and advanced geological prediction,the factors affecting the tunnel stability and the settlement law of the section are obtained;by establishing the seepage-stress coupling models under different water level environments,the settlement law on the ground surface is analyzed,and the maximum settlement position,i.e.the most unfavorable position is determined and reasonably optimized,so as to provide reference for similar underground engineering design and construction.