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以沈阳市天柱山附近的工程弃土为研究对象,利用室内人工模拟降雨方法,对25°坡面上不同土壤颗粒级配的工程弃土在1.0、1.5和2.0 mm/min 3种不同降雨强度作用下产生的径流量和产沙量进行分析研究。结果表明:1)试验所用Ⅰ～Ⅴ组土样随着降雨强度的增加(从1.5增加到2.0 mm/min),累积产沙量分别增加12.55、7.56、12.00、8.81和10.41 g,而在3种降雨强度作用下,3个最大与最小累积产沙量差值分别为6.39、11.64和13.78 g;2)产沙量随细度模数的增大而减少;3)在降雨强度、坡度、降雨历时等因子一定的条件下,土壤颗粒级配对径流量的影响比较小,不同颗粒级配土壤的累积径流量差异不明显。
Taking the engineering spoil near Tianzhu Mountain of Shenyang City as the research object, indoor artificial simulated rainfall method was used to test the effect of different types of soil grading on 25 ° slope on 1.0, 1.5 and 2.0 mm / min rainfall Runoff and sediment yield under the action of intensity are analyzed and studied. The results showed that: (1) The accumulated sediment yield increased by 12.55, 7.56, 12.00, 8.81 and 10.41 g with the increase of rainfall intensity (from 1.5 to 2.0 mm / min) Under the different rainfall intensities, the differences between the three maximum and minimum cumulative sediment yield were 6.39, 11.64 and 13.78 g, respectively; 2) The sediment yield decreased with the increase of the fineness modulus; 3) In the rainfall intensity, slope, Rainfall duration and other factors, the effect of soil particle gradation on runoff was relatively small, and the difference of cumulative runoff of soil with different particle gradations was insignificant.