暗埋工作井内钢筋混凝土密封舱室盾构始发技术

Tunnel Shield Launching Technology of Reinforced Concrete Sealed Cabin in Buried Work Welll

在城市轨道交通工程建设中,因盾构始发端处于富水地层,致使端头井地层无法加固或加固效果不理想,且始发空间又处于暗埋工作井内,传统的钢套筒密封始发技术无法适用,因此,亟需设计一种新型的盾构始发套筒。经研究开发,苏州地铁3号线东方之门站-现代大道站区间左线盾构始发首次采用了钢筋混凝土密封舱室技术,以平衡盾构掘进掌子面的水土压力,其效果理想,为富水地层、端头井后土体无法加固、暗埋工作井内等环境下的盾构机安全顺利始发提供了新方法。

In the construction of urban rail transit project,because the tunnel shield launching end is located in water-rich stratum,the end-well stratum can not be strengthened or the strengthening effect is not ideal,and the launching space is in the buried working well,the traditional steel sleeve sealing launching technology is not applicable,therefore,it is urgent to design a new type of shield launching sleeve.Through the research and development,for the first time in the section of Dongfangzhimen Station-Modern Avenue Station of Suzhou Metro Line 3,the reinforced concrete sealed cabin technology is used for the left-line tunnel shield launching to balance water and soil pressure of shield tunneling face.The effect is ideal,which provides a new method for the safe and smooth launching of tunnel shield machine under the environment of water-rich stratum,soil body behind the end well,where the soil can not be reinforced,and buried working well.