软土地层地铁隧道施工对地下管线的影响

为减小软土地层地铁隧道施工引起的地表沉降对地下管线的影响,考虑流固耦合效应和施工效应的综合作用,根据管线允许的安全控制标准,采用FLAC3D建立的数值模型,对降水、动态降水和非降水3种施工方法进行了对比研究.结果表明,非降水施工法是控制地层固结沉降最有效的施工方法.深圳地铁1号线采用该施工方法,保证了煤气管线在施工期间安全使用.

Influence of Metro Tunneling in Soft Clay Strata on Underground Pipeline

To reduce the influence of ground surface subsidence caused by metro tunneling in soft clay strata upon underground pipelines,the numerical simulation model in software FLAC3D was applied to compare three tunneling methods,i.e.,pumping,dynamic pumping and un-pumping tunneling methods,through considering the compounding effect of fluid-solid coupling and tunneling process and the safety control standard of pipelines.The research result shows that the un-pumping tunneling method is the most effective one,this...