大华水电站钢管道稳定分析评价

Evaluation on stability analysis of penstock of Dahua Hydropower Station

大华水电站为高水头引水式发电工程,钢管道山坡地质条件复杂。根据工程地质分区,前池、钢管道和厂房布置避开了存在重力地质问题的不稳定区域。对于选定的钢管道山坡,分段进行CSMR边坡岩体分类,利用YCW程序进行赤平投影分析,对稳定性较差坡段的镇墩用EMU程序进行稳定分析计算,分析评价结果纳入到勘察成果,经施工验证符合工程实际,效果良好。

Dahua Hydropower Station is a high head diversion type hydropower project with a complicated geological condition of the passing slope for its pensteck. In accordance with the geological zoning therein, the ustable areas caused by the geological problems from gravity are avoided for the layout of head-race bay, penstock and power-house. The rock body of the slope selected for the penstock is classified in sections with CSMR, and then the stability analysis and calculation are made with EMU for the anchorage blocks on the sections of the slopes with poor stability. The results from the analysis and evaluation are taken into the reconnaissance data concerned, which are demonstrated by the construction that they accord with the actual engineering requirement with batter effect.