田坝子隧道的坍方处理

Treatment for Tianbazi Tunnel Collapse

在软弱含水地层中进行隧道施工,难免发生坍塌,如何预防和减少坍方以及如何有效地加以整治,是隧道施工中的重要课题。在内昆铁路田坝子隧道出口坍方处理中,采用小导管注浆、格栅钢架临时加强支护等手段,取得了良好的效果。

It is easy to encounter collapse in excavating tunnel at soft aquifer. So how to prevent and reduce collapse as well as its effective treatment is a key topic in tunnel construction. And good results have been achieved in the exit of Tianbazi tunnel where collapse has occurred by means of grouting with small conduit and lattice girder as primary support.