陕西褒河石门水电站在厂房围堰地基防渗帷幕施工中,曾遇到大量漏浆的地层。厂房基坑位于河床的右侧,其底面高程低于河床数米,帷幕灌浆时河床正在过水。围堰的地基为人工开挖的岩石堆碴和砂卵石,其级配不详。帷幕水泥灌浆,采用自上而下分段施工的方法。由于灌浆孔邻近基坑,地层的透水性又较强,水泥浆大量流入基坑,不多的几个孔段即耗用 Shaanxi Baohe Shihmen Hydropower Station in the plant cofferdam foundation impervious curtain construction, have encountered a lot of leakage of the strata. The foundation pit of the plant is located on the right side of the riverbed. The elevation of the bottom of the plant is several meters below the riverbed, and the river bed is under water when the curtain is grouted. The cofferdam foundation is man-made excavated rock and ballast and gravel, the grading is unknown. Curtain cement grouting, using top-down construction method. As the grouting hole adjacent to the pit, the permeability of the formation is strong, a large number of flow into the pit, a few holes that consume