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。 Tunnel construction in soft and weak aquifers is inevitable collapse, how to prevent and reduce landslides and how to effectively remediation is an important issue in tunnel construction. During the treatment of the collapse of the Tianbazi Tunnel exit of Neijiang Railway, small pipes grouting and temporary reinforcement support of grille steel frame were used, which achieved good results.