淤泥质地层地铁隧道施工地表沉降预测及分析  

Forecast and analysis of surface subsidence of metro tunnel construction in mucky ground

作　　者：刘志春[1] 李文江[1] 朱永全[1] 

机构地区：[1]石家庄铁道学院土木工程分院,河北石家庄050043

出　　处：《岩土力学》2005年第10期1681-1684,共4页Rock and Soil Mechanics

摘　　要：南京地铁珠江路站-鼓楼站区间,穿越软～流塑状淤泥质粉质粘土地层和众多地面建筑物及密集地下管线.软～流塑状淤泥质地层压缩性高、强度低、易产生蠕动,围岩无自稳能力.在施工中采用大管棚+小导管超前预注浆+掌子面注浆隧道预支护方案及台阶法开挖与钢架、网、喷混凝土支护的综合措施.为了科学决策、安全施工,根据实际工况进行计算模拟、预测地表沉降,进行施工量测,实现了安全顺利施工,建筑物完好无损.The Nanjing subway section between Zhujiang Road station and Gulou station passes through many ground buildings and dense underground pipes in soft-flowing mucky silty clay ground. The stratum is of high compressibility, low intensity, easy creeping, and no self-stability. The synthetical measure is adopted in this project, such as large pipe shed and small tremie as advance support and deep hole grouting at the work face, bench excavation and steel surpport, steel mesh and shotcrete support. In order to realize scientific decision andsafety construction, calculation simulation is carded out according to the actual working condition to predict the surface subsidence. At the same time, subsidence monitoring is done during construction. The safety and smoothness of the tunnel construction is assured and the buildings are sound without any destruction.

关 键 词：软-流塑状淤泥质地层 地面建筑物 地表沉降 预测 监控量测 

分 类 号：TU45[建筑科学—岩土工程]