Experimental Study Of Flow Characteristics Oblique Stilling Basin

Due to the particularity and complexity, most of the actual traffic bridge engineering (gate) axis or center line and the center line of the river was not an angle90°, if in accordance with conventional practice underflow energy dissipation vertical stilling basin of the river, the bridge is bound to appear in after connecting sections of rivers and stilling a "keystone" to connect over the concrete, thus increasing the amount of concrete work and construction cost of the connection section. If the traffic around the bridge (gate) after stilling basin along to Shunqiao (gate) direction (ie, along with the front and rear axle stilling basin, the direction of the gate balance) can not only reduce the amount of the project, to save money, while also achieve better energy dissipation and erosion effects. As the study on the oblique stilling basin is not much, the paper is in principle positive stilling basin of previous studies of flow characteristics, explore stilling basin oblique flow characteristics.Paper studied the angle of75°,60°and45°three programs explore oblique flow characteristics stilling basin, explore the contents of the main diagonal stilling basin longitudinal velocity, lateral velocity, basin depth, Froude, oblique stilling basin energy dissipation and stilling basin depth oblique formula jump, the method by comparing the analysis found that:(1) For oblique Traffic Bridge (gate) after the stilling basin, using oblique stilling basin design method is better than the forward stilling basin design methods;(2) Oblique stilling basin of water features, including water depth stilling basin, horizontal velocity, vertical velocity, Froude number and energy dissipation have some variation, and its variation are stilling basin with oblique angle angle related articles have specifically addressed;(3) Overall energy dissipation oblique stilling better than the overall positive effect of stilling basin;(4) Forward depth is calculated after the jump stilling basin does not apply to oblique stilling basin depth is calculated after the jump, the article summarized, summary, and explore to the angle of75°,60°and45°oblique stilling basin after the jump depth formula.Through the analysis and study of the test found stilling basin oblique flow characteristics of many of the rules and characteristics, but the most important thing is to find a diagonal stilling basin is better than the positive effect of energy dissipation stilling basin of energy dissipation, for traffic Bridge (chamber) and the situation is not perpendicular to the river, we recommend using oblique stilling basin design methods.