枕头坝水电站抗滑桩护壁混凝土无底模施工技术研究

Study on Bottomless Framework Construction Technology for Anti-slide Pile Protecting Wall Concrete of Zhentouba Hydropower Station

枕头坝水电站抗滑桩为大孔径矩形人工挖孔桩,在深覆盖层抗滑桩护壁施工过程中,采用干净河砂充当护壁混凝土底模(无底模)施工,可大幅度提高抗滑桩护壁及成孔速度,降低深覆盖层中抗滑桩施工的塌孔现象,具有操作简单、安全可靠、经济适用等特点。

The anti-slide pile of Zhentouba Hydropower Station is rectangular-shaped hand-dug piles with large diame- ter. During the construction of anti-slide pile protecting wall in deep overburden, the construction of anti-slide pile pro- tecting wall and hole forming can be sped up by using clean river sand as bottom framework （bottomless） and the risk of hole collapse can be reduced. The construction technology has the characteristics of simple operation, safety, reliability, economical and practical performance.