公路隧道施工特大涌水的防治技术探讨

Investigation on prevention technique of especially big water inflow in road tunnel construction

隧道特大涌水如果没有预先查明导水通道和水量,靠隧道施工过程中单纯地质超前预报发现地质异常,并采取传统的超前小导管注浆进行治理,效果不佳。以三阳隧道特大涌水为例,分析涌水原因,并提出查明导水通道,"以堵为主"的环保型技术措施。

If the water-leading passage and quantity could not be found out in advance, It could not be well to prevent the big water inflow by advancing small pipe grouting trdationally, based on the unusual geology data gotton by advanceing geological forecast in the process of tunnal construction. Taking the especially big water inflow SanYan tunnel as an example, the reason of the water inflow was analyzed, and put forward technique measure：to find out the water-leading passage, and ＂take block up as the key＂ were presented.