浅埋富水卵石土岩层隧道地表止水注浆施工技术

Shallow Buried Tunnel Surface Water Prevention in Rich Water Pebble Soil Strata

浅埋富水卵石土岩层隧道在富水地段易发生较大规模的突涌泥石流。以紫云铁路跑马岗隧道DK14+300掌子面突涌泥石流地段所采取的掌子面流坍体封闭、地表止水注浆施工技术为例,阐述施工过程的技术参数确定、设备配置、工艺以及注意事项等关键内容,为同类工程建设提供借鉴。

Rich water pebble soil rock shallow buried tunnels in the water areas are prone to large-scale abrupt surge of debris flow.Combined with the collapse blocking and surface water prevention grouting of Paomagang Tunnel working face DK14＋300 on Ziyun railway,the paper illustrates key points in technical parameters,equipment configuration,process and the matters needing attention in construction process so as to provide reference for similar engineering construction.