【摘要】 结合路基边坡地形特点,在具体分析修正通用土壤流失方程(RUSLE)中地形因子计算方法的基础上,评价了路基边坡地形因子计算方法的适应性问题,并以位于湖北沪蓉西高速公路恩施至利川段公路路基边坡土壤侵蚀实测数据为基础,提出了修正方法。结果表明:(1)RUSLE中坡长因子用公式L=(λ/22.1)m计算,但公路路基边坡中坡度一般超过RUSLE的适用范围,因此不能用原有方法对m值进行核定;(2)公路路基边坡坡长因子L可用L=(λ/22.1)0.35计算;(3)67%、100%这两个路基边坡常见的坡度超出了以往的研究范围,不能用已有坡度公式计算;(4)33%、67%和100%坡度的坡度因子值分别是3.70、7.18和10.37。更多还原

【Abstract】 According to terrain characteristics of roadbed side slope and through concrete analysis of terrain factor calculation method in Revised Universal Soil Loss Equation(RUSLE),the compatible question of terrain factor computational method of roadbed side slope is appraised and the revision method on the basis of measured data of soil erosion in subgrade side slope of Hurongxi Expressway(from Enshi to Lichuan)in Hubei Province is proposed.The results indicate that:①In RUSLE slope length factor can be calculated by formula of L=(λ/22.1)m,but m should not be checked by the original method for the highway subgrade side slope because its gradient surpasses generally applicable scope of RUSLE;②L,slope length factor of highway subgrade side slope can be calculated by formula of L=(λ/22.1)m;③67%,100%,the two common slope for roadbed side slope,cannot use the slope formula computation surpassing the former research scope;④Slope factor value of 33%,67% and 103% respectively are 3.70,7.18 and 10.37.更多还原