隧洞竖井开挖施工

Excavating Tunnel Shafts

某隧洞工程线路总长22 955 m,其上设有三个竖井:通风竖井,施工竖井和调压竖井,其直径分别为6.8 m,5 m及18 m,其深度分别为62.8 m,45.1 m和52.8 m。调压井开挖方法为先导井后扩挖,其余两个竖井为全断面开挖。文中叙述了施工现场的供气、通风、供水和供电系统,并具体介绍了施工工艺。

In a certain tunnel project, which total length is 22955 m, there are three tunnel shafts: a ventilation shaft, a construction shaft and a surge tank shaft. The shafts' diameters are respectively 6.8 m, 5 m, and 18 m, their depths are 62.8 m, 45.1 m and 52.8 m. For the surge tank shaft, the excavation method is excavating a pilot drift first and expanding it afterwards, and for the other two shafts is excavating in the full section. The paper introduces the compressed air supply system, ventilation system, water supply system and power supply system in the construction site, and expounds the concrete construction technique.