水利学报Issue(8)：892-902,11.DOI:10.13243/j.cnki.slxb.2014.08.002
汶川震区滑坡堆积体土石混合坡面细沟水动力学特征室内试验
Indoor experiments on eroding rills hydrodynamics characteristics of earth-rock mixed landslide slope in Wenchuan Earthquake area
摘要
Abstract
A set of indoor experiments on earth-rock mixed steep slope with scouring flow method were conducted, and then the rill hydrodynamics characteristics under different flow rates, slopes, ratio of earth and rock contents were measured based on the angle of repose, bulk density, and ratio of earth and rocks that measured in the field investigation. The results show that under each flow rate of 34° and 4L/min of 36°,the average flow velocities under earth are significant higher than that of earth-rocks mixed. Under the 8 L/min and 12 L/min of 36° , the average flow rates increase gradually and become higher than that of earth. The average flow velocities under all of the groups decrease with the scouring times flies. The ratio of earth-rocks affecting the Reynolds number is complex. The flow regime is almost transition flow and tur-bulent flow during the experimental time. The influence of ratio of earth and rocks on Froude number has the same rules with that on average flow rates. As time goes on,Froude number transforms from supercriti-cal flow to subcritical flow, especially the changes are obvious under the earth and rocks mixed. Dar-cy-weisbach friction increases slowly, and then increases rapidly, decreases sharply at last with scouring time flies. The Froude number is 0.16~14.40 under the earth and 0.16~29.68 under earth and rocks mixed. Darcy-weisbach friction has negative correlation with Reynolds number.关键词
汶川震区/滑坡堆积体/细沟侵蚀/土石混合/水动力学Key words
Wenchuan Earthquake area/landslide/rill erosion/earth-rock mixed/hydrodynamics分类
农业科技引用本文复制引用
李天阳,何丙辉,雷廷武,陈展鹏,张怡..汶川震区滑坡堆积体土石混合坡面细沟水动力学特征室内试验[J].水利学报,2014,(8):892-902,11.基金项目
国家自然科学基金面上项目 （）
