关于局部冲刷发展过程及其稳定时间的探讨

0n the Local Scouring Process and Local Scour Equilibrium Duration

本文阐明了按模型试验研究制定的桥墩和丁坝及导流堤等的局部冲刷深度计算公式,只有使用稳定状态的冲刷深度资料(实测或外延)作依据才是合理和比较可靠的;提出了冲刷发展过程和冲刷稳定时间计算公式,并举例介绍了公式在工程设计中的应用。

In this paper, the reasonability and reliability of introducing the experimental data in a physical model study of equilibrium local scour depthmeasured or extrapolated to the calculation formulae of local scour depth atbridge piers and spurs and spur-dikes are illustrated. For the purpose ofobtaining the local scour depth of equilibrium, the formulae for calculatingthe local scouring process and the local scour equilibrium duration are pre-sented with example of its application.