洪家渡水电站锚固式拦漂排布置与优化设计

Layout and Optimization Design of Anchored Drift-holding Row at Hongjiadu Hydropower Station

洪家渡水电站库区水位变幅高、河道跨度大,增设拦漂排应结合选址、施工、投资、拦漂效果等因素综合考虑,通过对拦漂排布置型式进行方案论证和对比,确定了两端锚固型式为较优方案。基于对拦漂排各工况的运行条件和荷载组合分析计算,并对拦漂排结构型式进行优化设计。采用张拉绳作为主要受力部件,钢浮箱挂设于张拉绳上,在保证拦漂效果的同时,工程投资更省,施工更便利。对其他水位变幅大、河道较宽的水利水电工程具有借鉴意义。

The reservoir area of Hongjiadu Hydropower Station has high water level variation and large river span.The addition of drifting rafts should be comprehensively considered in consideration of factors such as site selection,construction,investment,and drifting effects.Through the demonstration and comparison of the arrangement of drifting rafts,the anchor type at both ends is determined to be the better solution.Based on the analysis and calculation of the operating conditions and load combinations of each working condition of the drifting row,the structure of the drifting row is optimized.The tension rope is used as the main stress component,and the steel pontoon is hung on the tension rope.While ensuring the effect of blocking floats,the project investment is less and the construction is more convenient.It has reference significance for other water conservancy and hydropower projects with large water level changes and wide river channels.