【摘要】 通过对来家铺弯道的野外测验资料进行整理、甄别和筛选,从中选取具有代表性的3组断面数据,分析弯道内悬沙粒径和垂线平均浓度的横向分布规律,悬沙浓度沿垂线分布规律。分析表明,断面平均流速是决定弯道悬沙中值粒径粗细和平均浓度高低的主要原因,凸岸悬沙垂线浓度均值一般高于凹岸,浓度的标准差也大于凹岸;弯道中粗沙浓度均值和标准差均高于细沙浓度均值,粗沙的分组粒径浓度沿垂线分布比细沙更不均匀。更多还原

【Abstract】 The measured data of suspended load concentration in Laijiapu bend of the Jingjiang river reach are carefully sorted out,judged and selected.3 groups of persuasive and representative data have been selected to analyze the transversal distribution law of suspended load grain-size and vertical average concentration in the river bend.The vertical distribution of suspended load concentration in river bend is comprehensively analyzed.The results show that the mean grain size and the average concentration of the suspended load depend on the average flow velocity of cross-section.The mean value and standard variance of vertical concentration of the suspended load depend at convex bank are generally higher than those of concave bank.The average concentration of coarse sand is higher than that of fine sand.And the vertical distribution of grouped grain-size concentration of coarse sand is more uneven that that of fine sand.更多还原