单线铁路隧道穿越厚层古河床地段施工技术

On construction technique of single line railway tunnel through thick-layer ancient riverbed section

通过一单线铁路隧道穿越厚层古河床地段的工程实例,介绍了该隧道施工中采用的开挖方案关键控制点、临时仰拱措施、抽排水措施、施工中出现的问题及应对措施等具体施工技术,对今后同类隧道工程施工具有指导作用。

According to the construction example of one single line railway tunnel through thick-layer ancient riverbed section, the paper introduces the adopted factual construction technology, including the excavation scheme, the key controlled points, the temporary inverted arch measure, the water pumping and drainage, the problems in the construction and respective measures, so as to direct similar tunnel construction.