山区公路排水急流槽冲刷试验

对急流槽出口衔接后冲刷坑最大冲深影响因素进行了分析。运用水力学基本原理建立急流槽出口衔接后最大冲深计算公式，试验得出按泥沙临界起动条件计算时的不同急流槽消能设计冲坑底紊动影响系数。结果表明：相同水力条件下，跌坎急流槽直接铺砌最大冲深大于斜插急流槽直接铺砌最大冲深；跌坎急流槽双消力池出口护坦衔接最大冲深大于跌坎急流槽单消力池出口护坦衔接最大冲深；跌坎急流槽单消力池出口护坦衔接最大冲深最小。

Scouring Test on Drainage Rapid Gutter of Mountain Road

This paper analyzed the scouring pit maximum deepness affect elements of the highway drainage gutter exit joint, and established the outlet joint maximum rush deepness theory formula with the hydraulics basic principle and the sand critical moving velocity. The series of scour pit influence coefficients were received under the rapid chamfer different annihilating designs through scouring tests. Under the identical flow condition, the maximal wash deepness of fall rapid chamfer with the direct lay is larger than that of the inclined interposition rapid gutter; the maximal scour deepness of the inclined rapid chamfer with the apron joint after the single eradicative energy pool exit is smaller than the fall rapid chamfer with that after double eliminate energy pool exit; the maximal scour deepness of the inclined rapid chamfer with the apron joint after the single eradicative energy pool exit is the minimum of all tests. 4 tabs, 6 figs, 7 refs.