In the end,acquiring the corresponding critical grade and critical sidetrack,in order to carry out rational development and use of geoloical structure and achieve the object of optimal construction scheme and maximum economic benefits.
以块体理论为基础,运用全空间赤平投影法,对层状岩质基坑壁走向与开挖坡度的关系进行了优化,得出了相应的基坑壁开挖临界坡度和临界走向,以对地质构造进行合理开发和利用,从而达到施工方案最优化和经济效益最大化的目的。
With discussions on the necessity of erosion protection for highway embankment slopes and the deficiencies of previous research of critical grade, hydraulic analyses was carried out on the velocity and depth of runoff on the slope.
首先分析了路堤边坡冲刷防护必要性及目前边坡冲刷临界坡度研究存在的不足,然后针对这些不足,对边坡径流流速、水深做了较为细致的水力学分析,利用泥沙动力学研究了坡面径流对土颗粒冲刷机理,得出了各主要坡面冲刷影响因素(降雨、坡高、坡面的粗糙系数、土粒比重与直径)与冲刷临界坡度的函数关系,并认为该坡度不是一个常数,而是一个受这些因素影响的可变区间。
Research on critical gradient for erosion of expressway embank slope based on energy method;
基于能量法的高等级公路路堤边坡冲刷临界坡度研究
By means of mechanics of sediment transport, forces acting on soil grain are analyzed under the slope surface flow and calculation formula of critical gradient is set up.
通过泥沙运动力学分析了在坡面流作用下土颗粒的受力情况,建立了临界坡度的计算公式。
The slope gradient has an important influence on soil erosion and the critical gradient exists under the condition of rainfall.
针对降雨条件等环境影响条件下路堑边坡存在的临界坡度,指出坡面流侵蚀的定义并系统分析了坡面流侵蚀的主要影响因素,利用泥沙运动力学理论,研究了坡面土壤侵蚀率与坡面流的剪切力之间的变化关系。
It is considered that the critical slope and steady slope can be formed for condition of characteristic flow during river closure of main channel.
认为在三峡大江截流特定的水流条件下，可以形成临界坡度和稳定坡度两种坡度。
But,there is a critical slope.
坡度是影响坡面土壤侵蚀的重要因素,在一定条件下,坡面土壤侵蚀随着坡度的增大而增加,但存在一个临界坡度,当超过这个坡度后,坡面土壤侵蚀量反而随着坡度的增大而减少。