乌东德水电站水垫塘护坡板块结构型式试验研究

发布时间：2018-05-16 04:31

本文选题：乌东德水电站 + 水垫塘　；参考：《水利水电技术》2017年11期

【摘要】：为解决高坝泄流引起的水垫塘内部水流紊动导致其结构破坏问题,针对乌东德水电站护坡不护底水垫塘的防护结构,依托乌东德水电站整体模型,考虑止水局部破坏的最不利工况,分别对排水失效、封闭自排、封闭抽排等三种板块结构型式进行了水力学试验研究,分析了不同板块型式对护坡板块背水面和迎水面时均压强、脉动压强以及脉压相关性的影响。结果表明:(1)相比排水失效板块,封闭自排和抽排板块对脉压的影响较小,但均能有效降低板块内外侧时均压强差,使最大时均压强差保持在0.4 m水头以下;(2)封闭自排板块能有效改善水位波动区板块内外侧脉压的同步性,提高脉动压强互相关系数;(3)抽排廊道的开挖对两岸岩体有削弱作用,可能对地下厂房不利。研究所得结构为水垫塘护坡设计和安全运行提供参考。
[Abstract]:In order to solve the problem of structure damage caused by turbulence in water cushion pond caused by discharge of high dam, in view of the protection structure of slope protection not protecting bottom water cushion pond of Wudongde Hydropower Station, the integral model of Wudongde Hydropower Station is relied on. Considering the most unfavorable condition of local failure of water stop, three kinds of plate structure types, such as drainage failure, closed self-discharge and closed drainage, are studied by hydraulics test. The effects of different plate types on the average pressure, pulsating pressure and pulse pressure at the back and facing of the slope protection plate are analyzed. The results show that the effect of self-draining and draining plate on pulse pressure is less than that of drainage failure plate, but both of them can effectively reduce the average pressure difference between the inner and outer sides of the plate. Keeping the maximum time-averaged pressure difference below 0.4 m) the closed self-draining plate can effectively improve the synchronism of the pulse pressure inside and outside the plate in the water level fluctuating zone, and increase the interrelation of pulsating pressure. The excavation of pulsating gallery can weaken the rock mass on both sides of the bank. It may be detrimental to the underground workshop. The structure provides reference for slope protection design and safe operation of water cushion pond.
【作者单位】：天津大学水利工程仿真与安全国家重点实验室;
【基金】：国家重点研发计划(2016YFC0401705) 国家自然科学基金创新研究群体科学基金(51621092);国家自然科学基金(51309177,51509180,51779167) 高等学校学科创新引智计划(B14012)
【分类号】：TV32

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