摘要
本文对淹没丁坝的壅水问题进行了理论分析和试验研究.将丁坝附近的水流运动简化为—维流动,根据水力学的基本原理,推导出丁坝上游最大壅水断面处的比能增值及其系数的数学表达式,在宽浅水槽中(槽宽4.2m)垂直于岸壁设置单个丁坝和不同个数丁坝组成的坝群进行壅水试验.根据试验测得的资料,按最小二乘法法则得到了单丁坝和丁坝群的比能增值系数的计算关系式.最后对淹没丁坝的壅水规律进行了讨论,分析了主要因素对壅水高度的影响.
The flow around the submerged spur dikes is simplified as one-dimensional flow. The mathematical expression for the increment of the specific energy at the highest superelevation section and its coefficient are established through theoretical analyses. The flume experiment on the superelevation for the submerged spur dikes is conducted. The empirical formulas for calculation of superelevation with single dike and dike groups are obtained based on the experimental data. The formulas can be used to estimate the effect of submerged spur dikes on water elevation during the flood period.
出处
《河海大学学报（自然科学版）》
CAS
CSCD
1991年第5期88-93,共6页
Journal of Hohai University(Natural Sciences)
关键词
丁坝
壅水
高度
水力学
试验
submerged spur dikes
hydraulics of spur dikes
superelevation of spur dikes
