哈大铁路客运专线鞍山隧道工程设计

Design of Anshan Tunnel on Harbin-Dalian Passenger Dedicated Line

鞍山隧道地处粉质黏土、粉土、砂类土等不良地质段,多处下穿地表房屋、城市道路、高压电线塔、油管等密集区。为适应复杂的地形、地质条件,鞍山隧道采取了放坡开挖、暗挖、钻孔灌注桩围护多种开挖方法,隧道集传统暗挖和明挖、城市地铁、框架明洞等施工工艺于一体,存在下穿铁路沉降要求高、明挖衬砌结构类型多,设计标准高等特点。通过对该隧道设计及施工方案的介绍,结合工程实践中遇到的问题的探讨,为今后在城区平原地区修建高速铁路隧道提供借鉴。

Anshan tunnel is located in poor geological section with silty clay,silt and sand,passing through some places concentrated with buildings,urban roads,high-voltage wire towers and oil pipelines.In order to adapt to the complex topography and geological conditions,Anshan tunnel applies a variety of tunneling methods,such as slope excavation,under-cutting,bored and grouted pile.The tunnels integrate traditional under-cutting,open-cutting,urban subway and framed open-cut characterized by high requirements for settlement of under-passing railway,multi-types of open-cut lining structure,and high design standard.With introduction of tunnel design and construction scheme,together with the discussion on the problems encountered during the construction,this paper may provide references for design of high speed railway tunnel on urban plain region.