中长管棚在隧洞特大塌方处理中的应用

Application of Middle and Long Pipe Shed Method in the Treatment of Tunnel Large-scale Collapse

针对甘肃舟曲喜儿沟电站引水洞特大塌方事故中塌方量大、塌腔高、塌渣呈松散块状、地下水丰富的实际情况,采用了"中长管棚超前支护、注浆加固胶结塌方岩渣、开挖结合使用小导管"的施工方法,取得了成功,可供同类工程借鉴。

For the actual situation of large-scale collapse,high cavity,loose bulk slag and rich underground water after the tunnel large-scale collapse accident in Gansu Zhouqu Xiergou Power Station Project,the method＂ middle/long pipe shed advanced support,collapse rock slag grouting support and cementation,excavation combined with small pipe usage＂was adopted,and it has been successful for reference to the similar project.