山区特长富水隧道防水治水施工技术

Waterproofing and Water Control Construction Technology of Super-long Rich Water Tunnel in Mountainous Areas

文章以瓦日铁路太行山隧道富水段施工作为研究对象,对涌水原因和存在的风险进行详细剖析,介绍了“预报先行、治水紧跟、管棚超前、注浆配合、控制进尺、微弱爆破、强化支护、快速封闭、加强测量”的特长富水隧道防水治水施工技术。通过配置横通道、截流排放与集水坑阶梯式排水并用、增加泄水孔、进行有效注浆、配置中部排水沟槽等一系列举措,有效降低了隧道涌水风险,解决了山区长大富水隧道施工难题,加快了施工进度,确保了施工运营安全。

The rich water section construction of Taihangshan Tunnel in Wari Railway is adopted as the research object in the paper. The cause of water gushing and the existing risks are analyzed in details. The super-long rich water tunnel waterproofing and water control construction technologies of “forecast first, water control subsequent, pipe shed in advance, grouting coordination, control footage, weak blasting, strengthened support, quick closure and strengthened measurement” are introduced. The tunnel water gushing risks are effectively reduced by a series of measures as follows: configuring cross passages, combination of intercepting discharge and stepped drainage of sump pit, increasing drainage holes, carrying out effective grouting, configuring central drainage trench, etc. The construction problems of super-long rich water tunnels in the mountainous areas are solved. The construction progress is accelerated, thereby ensuring the safety of construction operation.