特殊不良地质地段隧道施工技术

Special Bad Geological Section Tunnel Construction Technology

介绍了老鸦峡2号隧道通过砂卵石层、黄土、不稳定土体与泥石流的施工处理方法与现场经验,冬季隧道施工的应对措施,施工过程中加强监控量测,顺利完成隧道施工任务。卵石夹砂地段由于采取了短钢管加薄钢板护顶、先支护后注浆等施工措施,顺利通过特殊不良地质地段。

Crows gorge NO.2 Tunnel construction approach by the sand and gravel layer, loess, unstable soil and debris flow and field experience, responses winter tunnel construction, the construction process to strengthen the monitoring and measurement, the successful completion of the tunnel construction work. As a result of lots of sand pebbles short steel pipes steel sheet retaining the top, the first support after support construction grouting and other measures, passed a special bad geological section.