山岭隧道突泥涌水段治理技术分析

Analysis on Treatment Technology for the Mud and Water Inrush Section in Mountain Tunnels

某高速公路山岭隧道施工过程中连续发生多次大面积突泥涌水事故。文章结合隧址工程地质条件及水文条件,分析突泥涌水事故的经过及成因,并在此基础上提出突泥涌水治理技术。结果表明:该隧道地处富水地区断层破碎带,断层带节理裂隙发育、透水性高并储存大量岩溶地下水,且与地表水相连通,是导致隧区突泥涌水事故发生的主要原因,隧区大面积强降雨是突泥涌水发生的另一重要原因。基于此,制订了“排堵结合,浇筑护拱”的治理方案,详细介绍施工工艺,可供公路隧道工程突泥涌水防护借鉴。

During the construction of an expressway mountain tunnel,many large-scale mud and water inrush accidents occurred continuously.Based on the engineering geological and hydrological conditions of the tunnel site,this paper analyzes the process and causes of mud and water inrush accidents,and puts forward the treatment technology of mud and water inrush on this basis.The results show that the tunnel is located in the fault fracture zone of the water-rich area with developed joints and fissures,high permeability,and storage of a large amount of karst groundwater and it is connected to the surface water,which is the main reasons for the occurrence of the mud and water inrush accident in the tunnel area,and the large-scale heavy rainfall in the tunnel area is another important reason for the occurrence of mud and water inrush.Based on this,the treatment scheme of"combination of drainage and blocking,pouring and arch protection"is formulated,and the construction technology is introduced in detail,which can be used as a reference for the prevention of mud and water inrush in expressway tunnel engineering.