重庆较新线大坪车站大跨度暗挖隧道支护技术

The Supporting Technology for Wide-span & Hidden-excavation Urban Tunnel

大断面,超浅埋地下洞室,实施暗挖对岩石地区、人口密集且建筑物临近的闹市区,特别是洞内主体结构分层立体交错的复杂环境下施工并不多见。结合重庆较新线大坪车站隧道的工程特点和设计特点,并针对施工中的复杂情况,分别对隧道主体施工顺序、隧道、主体拱部支护施工、主体边墙初期支护施工及特殊地段支护施工等作了介绍,为城市大跨度暗挖隧道施工提供了一些可借鉴的经验。

This article introduces the engineering features of Daping Station turmei of Chongqing rail transit, the construction supporting method which combines its design characteristics a- gainst the complex geological conditions, and is supposed to re- duce the hidden-excavation danger, the auther argues that this research could provide some reference for the construction of wide-span ＆ hidden-excavation urban tunnels.