软土地区地铁不同结构间差异沉降特点分析

Characteristic Analysis of Non uniform Settlement for Different Structures of Metro in Soft Soil Districts

摘要:

分析软土地区46个地铁车站与隧道连接处、34个联络通道两端线路处以及4个U型槽与隧道连接处运营约10年后线路的长期沉降观测数据.结果表明：约70%的地铁车站与隧道连接处车站沉降少，且出站一侧沉降槽的深度与宽度大于进站一侧；联络通道旁线路产生了不均匀沉降的约占80%，其中约90%为沉降槽；U型槽与隧道连接处的差异沉降很小.

Abstract:

An analysis was made of a long term settlement of the metro line in service for about ten years, 46 joints between the stations and the tunnels in soft soil districts, 34 locations beside the subway connection aisles, and 4 joints between the U shaped grooves and the tunnels. Analysis results show that about 70% of the settlements occur in tunnel joints rather than in the station joints. The depth and width of settlement groove on the pull out side are larger than on the pull in side. About 80 % of differential settlements occur on the railway line beside the subway connection aisles, and about 90% of the differential settlements are settlement groove. The non uniform settlement at the joint between the U shaped groove and the tunnel is little.