无水砂卵石地层矿山法隧道施工中的暗挖初支技术

Technology of Underground Excavation with Early Support for Mined Tunnel Construction in Waterless Sandy Pebble Stratum

乌鲁木齐市轨道交通1号线三工站—宣仁墩站区间采用矿山法修建,开挖断面主要穿越无水砂卵石地层。以此为背景,在对无水砂卵石地层特性分析的基础上,对矿山法隧道施工中的暗挖初支关键工序制订了针对性的技术措施,经现场实践,较好地实现了工程目标,为类似地层矿山法隧道施工提供了有益参考。

The interval tunnel between Sangong Station and Xuanrendun Station in Urumqi Urban Rail Transit Line 1 was built by the mining method. The excavated section mainly passed through the waterless sandy pebble formation. Taking this situation as the background, and by the characteristic analysis of the waterless sandy pebble formation, the key technical measures were worked out for underground excavation with early support. After field practice, such technology has achieved good engineering goals and can provide beneficial reference for similar tunnel projects built by the mining method.