尼泊尔上崔树里水电站大坝抗冲耐磨修复方案

Erosion and Abrasion Resistance Repairing Scheme for Upper Trishuli Hydropower Station Dam in Nepal

尼泊尔上崔树里水电站所在河流河道纵坡达到3%,推移质含量高且粒径大,粒径最大达到1.5 m,对泄洪冲沙闸及下游消能防冲建筑物破坏严重。研究国内外对此类破坏的加固方法,在2018年汛期推移质对消能防冲建筑物严重破坏后,采用“钢轨+环氧混凝土”抗冲耐磨修复方案。该方案在国内尚属首例,近几年的运行表明,有效解决了该工程大粒径多推移质对消能防冲建筑物严重破坏的问题。

In the Upper Trishuli Hydropower Station in Nepal,the flood discharge and sediment flushing sluices and the downstream energy dissipation and erosion prevention structures are severely damaged as the longitudinal slope of the river bed where the station is located reaches 3%,and the bed load is of high content and large particle size with the maximum value of 1.5 m.Based on the analysis of reinforcement methods for such damages in China and abroad,an erosion and abrasion resistance repairing scheme of steel rails plus epoxy concrete is adopted to repair the serious damages of the energy dissipation and erosion prevention structures caused by the bed load during the flood season in 2018,which is the first engineering practice in China.The practical operation of the dam in recent years shows that the repairing scheme effectively solves the serious damages of the energy dissipation and erosion prevention structures caused by bed load with large particle size and high content.