摘要
主要论述宜万铁路野三关隧道施工穿越大型高压富水块石充填型溶洞的施工技术方案,根据超前地质预报精确超前探测溶洞的位置形状,通过迂回绕避先行越过溶洞腔体,回头对溶腔采用释能降压措施,解除溶洞出现不可预料的突水突泥石安全风险,然后对溶腔溃口进行封堵,主溶腔处采取加强初期支护措施治理溶洞,隧道衬砌结构紧跟顺利穿越大型溶洞,对隧道通过有复杂充填物大型溶洞施工具有系统指导意义。
This paper mainly discussed the construction technology scheme of Yesanguan Tunnel on Yichang-Wanzhou Rail- way crossing large karst cave filling with high-pressure and water-rich block stone. The technique of geological prospecting could accurately detect the location and shape of karst cave, and the measures of energy releasing and pressure lowering were taken after crossing the solution cavity by detour avoidance, thus the unpredictable safety risks of water bursting and mud bursting were solved. Then, the breach of solution cavity was plugged, and the initial support measures were taken at the main solution cavity to strengthen the karst cave, thus the tunnel lining structure smoothly passed through the large ca- ve. It was of great significance to guide the construction of tunnel passing through large cave with complex fillings.
作者
何佩军
He Peijun(China Railway 16th Bureau Group 4th Engineering Co. Ltd. , Beijing 101400, China)
出处
《铁道建筑技术》
2017年第5期85-89,共5页
Railway Construction Technology
关键词
高压富水
块石充填
迂回绕避
释能降压
溃口处理
high-pressure and water-rich
filling with block stone
detour avoidance
energy releasing and pressure lower-ing
breach processing
