水流作用下斜桩局部冲刷及流场变化试验研究

为研究水流作用下斜桩周围局部冲刷特性及流场变化并掌握斜桩同垂直桩的差异,本研究在不同流速条件下开展了包含反斜桩、垂直桩、正斜桩等多种工况的水槽试验,测量分析了斜桩的冲刷历时曲线、床面形态、沿程流速分布、最大冲刷深度等数据.结果表明:清水条件下斜桩周围局部冲刷坑及桩后沙丘尺度明显减小;斜桩桩前最大冲刷深度随倾角的增加而逐...

Experimental Study of Local Scour and Flow Field Alteration Around an Inclined Pile in Steady Currents

In order to study local scour characteristics and flow field alteration around inclined piles,and to master the differences comparing to vertical piles,flume tests were conducted under different velocities,including upstream inclined piles,vertical piles and downstream inclined piles.The scour duration curve,bed topography,longitudinal distribution of horizontal velocity,maximum scour depth and other data were measured and analyzed.The results showed that the scale of local scour hole and ridge behind the pile decrease obviously under clear scour condition.The maximum scour depth in front of inclined pile decreases with the increase of inclination angle,and the decrease rate of downstream inclined pile is faster.When the inclination angle reaches critical angle,the range of the recirculation region is maximum.There is a good linear relation between relative scour depth and inclination angle.