乐昌峡导流隧洞洞口塌方处理技术

Lechangxia Diversion Tunnel Entrance Landslide Treatment Technology

乐昌峡导流隧洞工程隧洞出口段在扩挖施工过程中,初期衬砌未能及时形成系统支护,使得在后续扩挖施工中由爆破震动引起了隧洞出口边坡开裂、洞内围岩位移、塌方等险情。在处理险情中提出了堆渣平压、削坡卸荷、后期加固等解决思路以及采用了预应力锚索施工技术。在处理措施实施后,有效的控制了裂缝发展,保证了后续的施工安全。

Lechang gorge export structure of diversion tunnel project of tunnel in the process of expansion construction, failed to form a system supporting early lining, Cause in the subsequent expansion construction, the blasting vibration the tunnel export crack hole slope surrounding rock displacement such as landslide danger. In dealing with dangerous situations and puts forward slag press- ing, cutting slope unloading and strengthening stage such as solution and adopted prestressed anchor cable the construction technolo- gy. After the treatment measures, effectively control the crack development, to ensure the subsequent construction safety.