地铁联络通道冻结法施工中冷冻排管布置形式分析

Analysis on the Freezing Row Tube Layout in Freezing Construction for Metro Tunnel Bypass

在富水土层中的地铁联络通道施工目前往往采用冻结法。该工法辅助冻结面易出现薄弱点,一般采用冷冻排管加保温板的方式进行保温,增强冻结效果。对冷冻排管的规格、贴合形式、流量、间距等参数进行分析,结合上海轨道交通9号线部分工程实测数据,得出适合地铁联络通道冻结施工使用的相关参数。

At present,the construction of metro tunnel bypass in water rich soil layer often adopts the freezing method,but weak points frequently appear in the auxiliary freezing surface.To enhance the freezing effect,the freezing row tube plus insulation board method is generally used.In this paper,row tube parameters of the specifications,fit form,flow and spacing are analyzed,and combined with the measured data of Shanghai rail transit Line 9,appropriate parameters for metro tunnel bypass freezing construction are obtained.