摘要: 斜井断面13.1m~2,斜长757m,穿过表土含水层93.5m。采用深水泵井点降水,超前小井排水,大揭盖明槽开挖,明、暗槽交界处采用止水垫和密集圆钢超前顶棚支护施工法。