摘要
随着城市地铁建设规模不断加大,研究岩溶区溶洞对地铁隧道稳定性的影响显得十分重要。采用三维有限差分软件FLAC3D进行流固耦合分析,对在既有地铁隧道的情况下,顶部溶洞大小的变化对新修地铁隧道的影响进行了探讨,得出新修地铁隧道结构呈现不均匀受力,且在一定范围内地表沉降值、其结构的变形及受力、溶洞变形等与溶洞大小呈弱线性关系等结论;并探讨了穿越岩溶区的施工处理技术。
With the constantly increasing scale of subway construction, it is exigent to research the influences of caves on the stability of subway tunnel in karst areas. In this paper, with the assumption that the subway tunnels were lately built, the influences of changing cave sizes above the tunnel were studied by three-dimensional coupled fluid-mechanical analysis using finite differential software FLAC3D The study results show that the newly built subway tunnel is subjected to non-uniformly distributed forces. And the structural deformation, structural loading, surface subsidence and cave deformation are in weak linear correlation with the cave size in a certain range. Construction technology for subway tunnels passing karst areas is studied as well.
出处
《施工技术》
CAS
北大核心
2012年第8期88-91,共4页
Construction Technology
关键词
隧道
溶洞
稳定性
流固耦合
施工技术
tunnels
caves
mechanical stability
coupled fluid-mechanical analysis
construction
