上海地铁隧道旁通道人工冻结法施工对周围环境的影响

The affection of artificial freezing method construction to the surrouding environment to the subway tunnel in the soft soil area

以上海市轨道交通12号线顾戴路站—东兰路站区间的旁通道冻结法施工为研究对象,运用COMSOL软件,通过分析地铁旁通道施工中冻结壁冻结及冻结壁完成后开挖对已有隧道及周围土体产生的应力及变形影响分析,得到这两个阶段施工对周围环境的影响规律、特性。结果可为地铁旁通道冻结法施工提供参考。

With the help of COMSOL the large computer software, we have simulated the stress distribution of the soil around, the influence that comes from the permafrost＇s freezing to the tunnel and frozen soil＇s stress and deformation after excavating the permafrost which sets the side channels from Gudai Road Station to Donglan Road Station of the No. 12 urban rail transportation line as calculation model. Through analysis the frozen wall freezing during the construction of channel besides the subway and the analysis the stress and deformation for the tunnel and soils when the frozen wall have been excavated. We can get the influence law and properties which the construction to the surrounding environment during the two stages to provide the reference for tunnel excavation in deep permafrost.