保压泵出渣技术在土压平衡盾构施工中的应用

Application of Technology with Pressure Holding Pump of Slag in EPB Shield Construction

为应对在富水砂卵石地层盾构掘进施工易发生喷涌的问题,依托南昌市轨道交通1号线土建六标工程为背景,成功实践出采用保压泵装置在喷涌发生条件下出渣施工技术,结果表明在存在承压(微承压)水的富水砂卵石地层盾构施工中,合理使用保压泵装置进行出渣是有效控制喷涌的方法之一。

In order to deal with the spewing problem which easily occurs in the water-rich sandy gravel stratum during shield tunneling construction, based on the engineering practice of Nanchang Metro Line 1, a construction technology using pressure holding pump device during slagging under the condition of spewing is adopted successfully. It is showed that during the shield construction which exists confined （ micro confined） water-rich cobble ground, using pressure holding pump device reasonably to slag is one of the effective ways to control spewing.