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peechtrees铜虫 (初入文坛)
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| 本文通过开展国内外最高实体坝漫顶溃决试验，揭示了不同粘性条件下均质土坝漫顶溃决的机理，提出“陡坎式”下切、双螺旋流淘刷及溃口边坡坍塌是土坝溃决的基本过程。坝体粘性对溃决过程有重要影响。坝体填筑材料粘性很大时（如C值大于40Kpa）时，漫顶溃决过程非常缓慢（本文试验中溃决时间在2小时以上），溃口规模相对较小，溃口峰值流量较小，坝体溃决方式以“多级陡坎”发展为主要特征。坝体填筑材料粘性较小时，下游坝坡很快冲蚀下切、后退，迅速形成单级大陡坎，溃决过程迅速，溃口规模相对较大，流量很快可达到峰值（本文试验中溃决时间在0.5小时以内），随后迅速下降。先前的研究报道溃口形态有矩形、梯形、三角形、抛物线型等，通过本文研究发现，溃口形态与坝体粘性有关。以上成果对于指导土坝溃决过程数学模型的建立具有直接指导作用，对提高洪水预报精度具有重要的意义。 |
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prince_of_persia
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2楼2009-05-18 13:16:22
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qingfeng877680(金币+6,VIP+0):带楼主感谢你的翻译。 6-9 14:42
qingfeng877680(金币+6,VIP+0):带楼主感谢你的翻译。 6-9 14:42
| In this paper, the highest domestic and foreign entities through diffuse dam outburst Top test, revealed a different viscous diffuse homogeneous earth dam under the condition of the mechanism of top-break, the "scarp-style" under the cut, double-spiral flow Amoy Burst Brush and the collapse of the dam slope The basic process of outburst. Viscous dam to break the process have had a significant impact. Dam during heavy viscous filling materials (such as the C value is greater than 40Kpa), the diffuse top outburst very slow process (in this article break test of time in more than two hours), relatively small Burst, Burst of the peak flow of small dam outburst body approach to the "multi-level scarp" the development of the main features of. Less viscous material filling the dam, the downstream slope erosion incised quickly, retreating quickly to form a single-stage large scarp, break the process of rapid and relatively large-scale breaches, can quickly reach its peak flow (time outburst of this article Test 0.5 hours), then decreased rapidly. Previous studies have reported breaches of rectangular shape, trapezoidal, triangular, parabolic, etc., through this study found that breaches of the form and viscous body. The above results for the earth to guide the process of mathematical model of the outburst has a direct role in guiding the establishment, to improve the accuracy of flood forecasting is of great significance. |
3楼2009-05-18 20:18:39
