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在寒冷地区,混凝土溢流坝面由于受泄洪水流的冲刷、气蚀、渗漏、冻融等原因,很容易遭到破坏。我国东北寒冷地区,近年来几座混凝土大坝溢流面,都出现了不同程度的破坏情况。这是大家很关心的一个问题。防止溢流坝面破坏的途径,一方面须通过水工模型试验选择良好的水力学条件,并加强溢流坝表面平正度的控制,尽量减少水流冲刷及高速水流气蚀破坏;另一方面还必须提高溢流坝面混凝土质量,改善其抗渗、抗冻、抗冲刷、抗气蚀性能。本文拟就东北
In cold areas, the concrete spillway dam is easily damaged due to flood, erosion, leakage, freezing and thawing. In the cold areas of northeast China, in recent years several concrete dam overflow surfaces have experienced different degrees of damage. This is a problem everyone is concerned about. On the one hand, it is necessary to select good hydraulic conditions through hydraulic model tests and to control the surface smoothness of spillway so as to minimize the scouring of water flow and cavitation damage of high-speed water flow; on the other hand, We must improve the quality of overflow dam concrete, improve its impermeability, frost resistance, erosion resistance, cavitation erosion resistance. This article is about the northeast