陡坡富水斜井仰拱施工技术

大相岭泥巴山隧道2#通风斜井左线全长909.38 m、倾角17°29′19″(坡度31.5%),右洞斜井912.7 m、倾角16°41′12″(坡度30%),采用有轨运输系统,地质情况复杂,日涌水量达27 000 m3/d。文章介绍了长大陡坡富水斜井仰拱施工技术,采用先浇筑仰拱两侧墙角处边墙混凝土,完善了排水系统,保护了拱脚,使得仰拱能够全幅一次浇筑,确保了混凝土质量,并使结构安全稳定及工程稳步推进,加快了施工进度,颇值类似工程借鉴。

Construction Techniques for Inverts of Steeply Inclined Shafts with High Water Inflow

The no.2 ventilation inclined shaft for the left line of Daxiangling Nibashan tunnel has a total length of 909.38 m and inclined angle of 17°29′19″(31.5% slope),and the total length of that for the right line is 912.7m with inclined angle of 16°41′12″(30% slope).Track transport systems were adopted,considering the complex geological conditions and water inflow of 27,000m3/day.This paper introduces the construction techniques for inverts of the steeply inclined shafts with high water inflow.The side walls at the corner of the invert were cast first with the drainage system included and then the invert was cast full width all at once to ensure quality and safety.