Dr2危岩体预应力锚索栈桥设计与施工

Design and construction of prestress anchorage cable trestle bridge on Dr2 dangerous rock body

大中型水库高危边坡通常采用预应力锚索加固,为了给造孔机械、编索、下设、注浆等提供施工条件,多采用脚手架管搭设平台。在乌江索风营水电站Dr2危岩体施工中,首次采用型钢栈桥,不仅克服了边坡较高、岩壁陡峭、局部倒挂等施工难题,还保证了平台稳定,节约了大量材料,技术经济效果明显。

The reinforcement of high and dangerous slope of large and middle reservoir usually use the prestress anchorage cable. In order to provide the construction conditions for making hole, weaving chain, down laying and grouting, the scaffold pipes are often used to make platform. The steel reinforced trestle bridge is firstly used in construction for Dr2 dangerous rock of Suofengying hydropower station in Wujiang river. The project not only overcomes the problems of higher slope, steep cliffs, local hanging upside down, etc., but also ensures the platform stability and saves lots of materials. The technical and economic effect is obvious.