《Journal of Hydraulic Engineering》杂志刊登“增大石头尺寸应对漫顶流”

作  者：Christopher I. Thornton, Steven R. Abt, Bryan N. Scholl, Theodore R. Bender

刊  物：《Journal of Hydraulic Engineering》，2013年10月9日印刷

关键词：石头尺寸；漫顶；抛石尺寸表达式

摘  要：抛石是使用最广泛的水土保持防治技术，可用于保护土石坝，堤坝，溢洪道，以及受漫顶影响的结构。研究表明， 目前可用于确定石头尺寸的抛石设计表达式超过21。然而，这些关系均是根据有限的数据库得出的。利用从10次独立调查中得到的102个漫顶观测值进行回归分析，分析涉及边坡的中石尺寸，比流量，均匀系数，岩层厚度以及石头的比重。得到唯一的抛石尺寸表达式，且判定系数（R2）为0.97，方差为11％。由此产生的关系式扩展了独立变量的边界条件，从而降低了推算之前关系式的必要性。

Enhanced Stone Sizing for Overtopping Flow

Authors: Christopher I. Thornton, Steven R. Abt, Bryan N. Scholl, Theodore R. Bender

Journal: Journal of Hydraulic Engineering, Published: 09 October 2013

Key words: stone sizing; overtopping ; riprap-sizing expression

Abstract: Rock riprap is one of the most widely used erosion control techniques for protecting embankments, levees, spillways, and in-stream structures subjected to overtopping flow conditions. The literature indicates that over twenty-one riprap design expressions exist to appropriately size the stone. However, each of these relationships were developed from limited databases with narrow bands of boundary conditions. A power regression analysis was performed using 102 overtopping observations from ten separate investigations; the analysis related median stone size to slope, unit discharge, coefficient of uniformity, rock layer thickness, and stone specific gravity. A unique, riprap-sizing expression was developed with a coefficient of determination (R2) of 0.97 and a variance of 11%. The resulting design relationship expands the boundary conditions of the independent variables beyond earlier efforts thereby reducing the need for extrapolating previous relationships.

原文链接：http://ascelibrary.org/doi/abs/10.1061/%28ASCE%29HY.1943-7900.0000830