| 胡德超,张俊华,钟德钰,马涛.推移质泥沙级配确定方法的试验检验[J].水利学报,2009,40(3): |
| 推移质泥沙级配确定方法的试验检验 |
| Validity verification of methods for determining bedload grain size distribution |
| |
| DOI： |
| 中文关键词: 推移质 级配 正态河工模型 计算方法 |
| 英文关键词: bed load grain size distribution undistorted model test calculation methods |
| 基金项目: |
|
| 摘要点击次数: 3443 |
| 全文下载次数: 715 |
| 中文摘要: |
| 利用正态动床模型中推移质级配随水流强度变化的观测资料，分别从模型角度和原型角度对概率统计法、最大粒径法和平均粒径类比法等确定河床推移质级配的方法进行了检验与比较。从模型角度比较结果表明在较小和较大流量下采用概率统计法计算的级配相对实测值分别偏粗和偏细，另两种方法在各种流量条件下的计算结果与实测数据均较为吻合。从原型角度比较结果表明概率统计法在小流量和大流量下较实测值分别偏粗和偏细，与从模型角度比较类似，最大粒径法在大流量下较实测值偏细，平均粒径类比法计算结果在各级流量下与实测值均较为接近。 |
| 英文摘要: |
| Based on the experimental data obtained from an undistorted, moveable bed model for studying bedload, three methods for determining bedload grain size distribution including the statistic theory method, maximum diameter method and average diameter method are compared from the view points of model and prototype respectively. The results show that from the view point of model the accuracy of statistic theory method is low at small or large flow discharge, and the other two methods give satisfactory results at various discharges. From the view point of prototype the grain size calculated with statistic theory method is larger than the experimental data at small discharge and is smaller at large discharge. The calculated result obtained from the maximum diameter method is smaller than experimental result at large discharge. Whereas, the calculation results always agree well with experimental data when average diameter method is used. |
|
查看全文
查看/发表评论 下载PDF阅读器 |
| 关闭 |