摘要
三峡水库运行后,中值粒径为0.01 mm的细颗粒泥沙大量落淤,对大细颗粒泥沙起动流速的研究是解决三峡水库泥沙淤积问题的基础。利用搜集的室内试验资料验证了现有的典型起动流速公式,结果表明细颗粒泥沙的起动受水深和干容重的影响,而现有公式精度不高。根据泥沙颗粒受力原理建立了新的起动流速公式,综合大量实测资料和已有研究成果拟合公式参数,新公式的计算值与实测值符合较好,相对误差较低。
Since Three Gorges Reservoir operated,there have been a large amount of fine sediment deposition with 0. 01 mm medium size. The basis to address this issue lies on the study on the fine sediment incipient velocity. The existing representative incipient velocity formula was verified with the collected lab experiment data,and the result turned out that the incipience of fine sand was influenced by water depth and dry bulk density,in addition that the accuracy of existing formula was insufficient. The new incipient velocity formula was established based on the stress principle of sediment particle,and the fitted parameters were obtained by using large amount of measured data and previous works. It turns out that the calculated values of the new formula are in good agreement with the measured values,namely,it has a relative low error ratio.
作者
李文杰
赵畅
杨胜发
王涛
LI Wenjie ZHAO Chang YANG Shengfa WANG Tao(National Engineering Research Center for Inland Waterway Regulation, Chongqing Jiaotong University, Chongqing 400074, P. R. China Changjiang Chongqing Harbour and Waterway Engineering Investigation and Design Institute, Chongqing 401147, P. R. China)
出处
《重庆交通大学学报（自然科学版）》
CAS
北大核心
2016年第6期68-72,共5页
Journal of Chongqing Jiaotong University(Natural Science)
基金
国家自然科学基金项目(51209241)
国家科技支撑计划项目(2012BAB05B03)
交通运输部应用基础研究项目(2014329814310)
关键词
航道工程
起动流速
细颗粒泥沙
三峡水库
waterway engineering
incipient velocity
fine sediment
Three Gorges Reservoir
