稀性泥石流容重计算的改进方法

Research on the Improved Calculating Density of Less Viscosity Debris Flows

稀性泥石流的沉积样的粒度不能反映稀性泥石流的实际粒度,过渡(亚粘性)泥石流的沉积样的粒度也不能完全反映亚粘性泥石流的实际粒度。通过分析稀性泥石流和亚粘性泥石流沉积样中的粗颗粒和细颗粒组成的百分比与稀性泥石流和亚粘性泥石流的实际粒度分布关系,得出稀性泥石流以细颗粒为主,>5mm的粗颗粒的百分比较小,大多数稀性泥石流的沉积样中这部分粗颗粒百分含量被夸大。去掉稀性泥石流沉积样中>5mm的粗颗粒可以修正被夸大的粗颗粒比例,由此粒度分布和修正公式计算的稀性泥石流容重与实际容重吻合较好。去掉亚粘性泥石流沉积样中>20mm的粗颗粒,可以修正亚粘性泥石流的粒度分布,由此粒度分布计算的亚粘性泥石流容重与实际容重吻合更好。

The particle distribution of the deposition of less viscosity debris flow is not the real particle distribution as the sorting of less viscosity of debris flow. The deposition of transitional debris flow is close to its real particle distribution as the transitional debris flow is weak sorting. Comparing the particle distributions of depositions of less viscosity and transitional debris flows with their real particle distributions, we get the fine particle is the main part of less viscosity debris flow, and the percentage of 〉 5 mm is small. Most percentages of coarse particles in less viscosity debris flows are aggrandized. To correct the aggrandized percentage of coarse particle in less viscosity debris flow, delete the coarse part of 〉 5 mm is necessary. The real densities of less viscosity debris flows are good consistency with the densities calculated by the corrected particle distributions and improved equation. To correct the aggrandized percentage of coarse particle in transitional debris flow, delete the coarse part of 〉 20 mm is necessary. The real densities of transitional debris flows are better consistency with the densities calculated by the corrected particle distributions.