砂土中圆形桥墩局部冲刷试验研究

Experimental Study on Local Scour of Circular Pier in Sandy Soil

桥墩的冲刷研究对于水工大桥结构的安全设计具有极其重要的意义。针对砂土中圆形桥墩的局部冲刷进行试验研究,通过长时间的冲刷试验,评估圆柱形桥墩处局部冲刷的时间发展,以及桥墩形状和不同流速对局部冲刷深度的有效性,同时描述了桥墩处可能出现的冲刷深度变化。结果表明,冲刷深度随时间增加而增加;最大冲刷深度取决于时间和流速,且最大冲刷深度也随着流量和时间的增加而增加。

The study of pier scouring is great significance for the safety design of hydraulic bridge structure. In this paper, the local scour of circular pier in sand is experimentally studied. Through long-term scour tests, the time development of local scour at cylindrical pier and the effectiveness of pier shape and different flow velocity on local scour depth are evaluated. This study describes possible changes in scour depth at piers. The results show that the scouring depth increases with time. In addition, the maximum scouring depth depends on time and velocity, and the maximum scouring depth also increases with the increase of flow and time.