复杂地质条件下大跨径地铁浅埋暗挖隧道双侧壁导坑法施工技术

Double-side Heading Method for a Long-span Shallow-buried Metro Tunnel Construction in Complex Geological Conditions

长春市地处中国东北长春平原腹地,其地质条件主要体现为黏土、砂岩、泥岩且地下水丰富、岩层交错为典型复杂地质之一。本文以长春地铁2号线车辆段出入线暗挖区间采用双侧壁导坑法为例,详细介绍了城市地铁在复杂地质条件下大跨径双侧壁导坑法的施工原理、特点、工艺及方法,为类似的工程提供借鉴作用。

Changchun is located in the middle of Changchun plain,southeast of China. The geological condition in Changchun is quite complicated and typical,commonly composed of clay,sandstone,mudstone and rich groundwater. This paper takes the Changchun Metro Line 2 as an example,introduces in detail of the construction principle,characteristics,technology and method of the double-side heading construction method used in a long-span shallow-buried tunnel which is built in complex geological conditions. This paper could be used as a reference for similar projects.