镇安抽水蓄能电站弃渣坝分区优化研究

Research on Zoning Optimization of Waste Slag Dam of Zhen’an Pumped Storage Power Station

镇安抽水蓄能电站弃渣坝体型复杂、弃渣量大且坝坡上建有永久上坝道路,为了保证弃渣坝的安全稳定以及上坝道路的交通安全,该文结合弃渣坝体型结构、施工计划与弃渣种类,采用有限元分析法进行弃渣坝的分区设计。通过对弃渣坝进行合理分区,将坝体分为上游上坝坡、上游下坝坡、路基、下游坝坡4个区域,经过变形与稳定性分析得出:采用覆盖层渣料填筑于上游上坝坡,以及使用模量较高的风化层渣料填筑其余区域的分区方案,则弃渣坝稳定性较高、永久道路的变形量较小,从而使弃渣坝整体安全性与可靠性较高,说明该方案具有较大合理性。

The waste slag dam of Zhen’an Pumped-storage Power Station is characteristic of complex body shape and large amount of waste slag,and with a permanent upper dam road built on the dam slope.Taking consideration of the waste slag dam’s body structure,construction plan and types of waste slag,this paper applies the finite element analysis to the zoning design to ensure the safety and stability of the waste slag dam and the traffic safety of the upper dam road.Through reasonable division of the waste slag dam,the dam body is divided into four areas:upstream upper dam slope,upstream lower dam slope,roadbed,and downstream dam slope.Through the analysis of deformation and stability,it is concluded that the scheme of using covering slag to fill the upstream dam slope and using weathered layer slag with higher modulus to fill the rest areas has higher stability for the waste slag dam and smaller deformation of the permanent road,which improves the overall safety and reliability of the dam,indicating that the scheme is reasonable to a larger extent.