关于风化泥岩隧道冒顶治理研究

Study of Treatment to Tunnel Roof Fall with Weathered Mud Stone

在山区公路建设中,隧道工程的重要性越来越显著,其数量和长度明显增加,规模不断扩大。然而,不良的工程地质、水文地质以及人为因素引发的冒顶塌方是隧道施工过程中不可回避的技术难题。通过查阅国内外相关资料,总结前人关于隧道冒顶塌方治理措施和现场试验的方法进行风化泥岩隧道冒顶治理措施研究。提出了地表注浆加固、高压旋喷注浆加固隧道洞内淤泥、设置超前注浆小导管以及在隧道掌子面设置帷幕注浆等联合措施治理隧道冒顶,结果表明该措施合理可行。

In the construction of mountain highway,the importance of the tunnel engineering is becoming more and more significant,the number and length of tunnel projects are obvious increasing,and the dimension is also constantly expanding.However,the roof fall in tunnel engineering arising from unfavorable engineering geology,hydrogeology and human factors is an unavoidable technological difficult problem in the process of tunnel construction.Through access to relevant literature from domestic and abroad,the previous method of tunnel roof fall management scheme are summarized and field investigation is conducted to study the treatment measures for the weathered mud stone tunnel roof fall.Combined measures are proposed to control the roof fall of tunnel such as taking surface grouting reinforcement and high pressure jet grouting reinforcement measures with the mud in the tunnel,setting small duct grouting and curtain grouting joint measures etc.The results show that the measures are reasonable and feasible.