弯道抛石护岸水流特征及水毁试验研究
发布时间:2018-06-08 03:11
本文选题:抛石 + 护坡 ; 参考:《水运工程》2017年12期
【摘要】:平顺抛石护岸在长江中下游应用最为广泛,能够增强堤岸的抗洪能力,保障中下游广大平原地区和沿江各大中城市的防洪安全。然而,护岸块石常常发生滑落导致护岸破坏。为了解其破坏机理,进行了不同岸坡坡度、不同块石粒径及大小、不同流速等条件下的水槽试验,从块石受力、弯道水流特征、块石位移特征及坍塌特征等方面研究了抛石护岸的水毁,提出了抛石护岸破坏程度的判别指标并给出需要维护的时间点的建议。
[Abstract]:Pingshun riprap revetment is most widely used in the middle and lower reaches of the Yangtze River. It can enhance the flood control ability of the embankment and ensure the flood control safety in the vast plain areas of the middle and lower reaches and the large and medium cities along the Yangtze River. However, the rubble often slips and results in damage to the revetment. In order to understand its failure mechanism, flume tests were carried out under different slope degrees, different rock sizes and sizes, and different velocity of flow. In this paper, the characteristics of rock mass displacement and collapse are studied, and the damage degree of riprap revetment is studied. The criterion of damage degree is put forward and the suggestion of time point for maintenance is given.
【作者单位】: 南京水利科学研究院;
【分类号】:TV133
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