杨房沟水电站拱坝泄洪中孔出口闸墩预应力锚索施工技术

Construction technology of prestressed anchor cable for gate pier at outlet of flood discharge middle hole of arch dam of Yangfanggou hydropower station

杨房沟水电站为混凝土双曲拱坝,坝身设置有3个泄洪中孔,采用预应力闸墩锚固设计,由于预应力闸墩锚索施工属高空临边作业,现场施工场地狭小,施工干扰大,U型锚索及直线对穿锚索施工工期紧,安全风险极高。为保证施工安全及质量,制定杨房沟拱坝泄洪中孔出口闸墩预应力锚索施工技术。本文主要介绍了预应力锚索护管的预埋,锚索的制作、安装、张拉等关键施工工序。