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多年的实践证明,发生根石走失的主要原因为坝岸根石深度不够,水流淘刷形成的坝前冲刷坑,使坝体发生裂缝和蛰动;坝岸遭受急流冲刷,水流速度过高,超过保护层单体的起动流速,将根石等料物冲揭剥离;新修坝基础尚未稳定,而且河床多沙,在水流冲刷过程中,使新修坝岸基础不断下蛰出险。本文对黄河根石走失的原因进行了分析,提出了建议。
Many years of practice have proved that the main reason for the loss of the root stone is that the depth of the root stone of the dam bank is not enough and the scouring pit before the dam formed by the water flow scouring causes cracks and stinging of the dam body. The dam bank suffers rapid rafting and the water flow velocity is too high, Layer monomer starting flow rate, the roots and other materials will be washed away; the foundation of the new dam has not yet stabilized, and the riverbed is sandy. During the process of water scour, the foundation of the new dam will continue to be stung out. This article analyzes the causes of the disappearance of Yellow River root stone and puts forward some suggestions.