密布半球型桥墩防冲刷装置局部冲刷试验研究

EXPERIMENTAL STUDY ON PARTIAL SCOUR OF ANTI-SCOUR DEVICE FOR DENSE HEMISPHERICAL PIERS

文中对一种装配式桥墩防冲刷装置提出改进,即对装置表面设置半球凸起用以增强导流,达到减小其局部冲刷的目的,并通过水槽清水冲刷试验验证了其效果。试验结果表明,在装置表面增加半球导流,可以有效减少装置的局部冲刷量。同时,对桥墩起到良好的防护作用;导流半球布置排数增加、半球半径增大,装置的局部冲刷量均呈减小趋势。

In this paper, an improved anti-scouring device for a bridge pier is proposed, that is, a hemispherical protrusion is arranged on the surface of the device to enhance the diversion, so as to reduce the local flushing, and the effect is verified by the flushing test of the sink water. The test results show that increasing the hemispherical flow on the surface of the device can effectively reduce the local flushing capacity of the device. At the same time,it still maintains a good protective effect on the pier;the number of rows in the guiding hemisphere increases, the radius of the hemisphere increases, and the local flushing amount of the device shows a decreasing trend.