非均匀沙干容重计算方法的探讨  

New method for calculating dry density of nonuniform sediment

作　　者：浦承松 梅伟 朱宝土[2] 张天力 詹义正[3] 

机构地区：[1]云南省水利水电勘测设计研究院,云南昆明650021 [2]浙江省水利河口研究院,浙江杭州310020 [3]武汉大学水资源与水电工程科学国家重点实验室,湖北武汉430072

出　　处：《武汉大学学报（工学版）》2010年第3期320-324,329,共6页Engineering Journal of Wuhan University

基　　金：国家科技支撑计划项目(编号:2006BAB05B03);国家自然科学基金项目(编号:50679065)

摘　　要：指出细颗粒泥沙的沙粒形态及絮网结构是影响干容重不可忽视的因素,并说明浆体的极限浓度是影响干容重的重要指标之一.基于浑水容重随浆体含沙浓度增大而增大的变化规律,将床面含泥浓度与泥沙极限浓度联系起来,获得了包含有泥沙粒径、级配及形状等因素在内的非均匀泥沙干容重的计算公式.公式中含有相关参数,用实测资料给予了确定.验证计算表明,公式结构合理,参数的选择得当,计算结果与实测资料基本一致,可应用于生产实际.It is pointed out that the sediment morphology and flocculent structure are unneglectable factors influencing sediment dry density,and that the limit concentration of slurry is one of the important indices affecting sediment dry density.Based on the variation that the turbid density increases with the increasing of sediment concentration;the relationship between the sediment dry density and the limit concentration of slurry are obtained through analyzing the relationship between concentration of slurry and limit concentration of slurry.Then a formula for calculating dry density of nonuniform sediment is established including such factors as sediment diameter,size gradation and shape.The formula includes some relative parameters which are determined by measured data.The calculation results show that the formula and its relative parameters are of rational structure.The dry density by the proposed formula agrees well with the measured data.

关 键 词：非均匀沙 干容重 浆体极限浓度 含泥浓度 

分 类 号：TV141.1[水利工程—水力学及河流动力学]