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泥石流的弯道超高特性随泥石流的流体性质不同而有显著差异。开展了稀性、亚黏性和黏性3类泥石流的25组弯道超高水槽实验,研究发现:1)泥石流过弯的液面倾角与流速的关系分为3个不同区间。当流速小于2.4 m/s时、大于3.0m/s时,泥石流液面倾角分别在24°、50°左右波动;处于两者之间时,液面倾角随流速线性增长。2)不同类型泥石流超高最大值出现的位置有显著差异,稀性、亚黏性和黏性泥石流弯道超高最大值分别出现在75°、60°和45°幅度角左右。3)采用线性回归分析方法分析了弯道超高分布系数随幅度角正弦值的变化曲线,得到两者之间呈三次多项式的经验关系。
The characteristics of the curve of the debris flow have a significant difference with the fluid properties of the debris flow. A series of 25 curve ultra-high flume experiments with 3 types of debris flow, such as dilute, sub-viscous and viscous, were carried out. The results show that: 1) The relationship between liquid surface inclination and velocity is divided into three different intervals. When the velocity is less than 2.4 m / s, when the velocity is more than 3.0 m / s, the slope of debris flow fluctuates around 24 ° and 50 °, respectively. When it is between the two, the inclination increases linearly with the flow rate. 2) There are significant differences in the locations of the ultrahigh maximums of different types of debris flows. The maximum values of the thinness, sub-viscous and viscous debris flow curves appear at 75 °, 60 ° and 45 °, respectively. 3) Linear regression analysis method is used to analyze the curve of curve hypercord distribution coefficient with the sine of magnitude angle, and the empirical relationship between them is shown as the cubic polynomial.