黄土隧道浅埋段施工技术

Construction technology of shallow buried section of LOESS tunnel

隧道浅埋段由于隧道顶面覆盖的围岩较薄,完整性较差,特别是黄土隧道浅埋段,围岩地质条件更为不良,黄土陷穴、直切冲沟等地质问题时常存在,开挖中容易引起地表沉陷,直接影响隧道的安全掘进,本文以新建兰州至合作铁路黄家岭隧道浅埋段施工为实例,介绍隧道穿越黄土浅埋地段的施工技术,以期对类似工程有一定的借鉴作用。

due to the thin surrounding rock covering the roof of the tunnel, the integrity is poor, especially the shallow buried section of the LOESS tunnel, and the geological conditions of the surrounding rock are even worse.Geological problems such as the LOESS pit and the straight cut gully often exist, and it is easy to cause surface subsidence during excavation.This paper takes the construction of the shallow buried section of the new Huangjialing tunnel from Lanzhou to the cooperative railway as an example, sand introduces the construction technology of the tunnel through the shallow buried area of LOESS, so as to have a certain reference for similar projects.