典型松散体边坡滚石运动距离的运动学分析

Kinematics analysis for calculating distance of rockfalls on typical loose media slope

绕避距离是山区公路选线需要确定的重要指标之一.采用运动学的分析方法,在考虑碰撞过程中滚石自转影响的情况下推导出典型松散体边坡滚石运动距离的计算公式,利用Rocfall软件构建现场试验模型,并将软件模拟、公式计算、现场试验测量的结果作对比,验证了推导的公式可行性,对于滚石绕避距离的确定具有一定的指导意义.对滚石运动距离的典型影响因素进行分析,为进一步研究滚石的运动奠定了基础.

Determining avoiding routes is a key specification for highway location in moun- tain areas. According to the kinematics theory, formulae are derived for calculating distance of rockfalls on loose slope, taking into consideration the influence of rotation during colli- sion. Using the software Rockfall, a model of field test is constructed. Results of software modeling, formula-based calculation and measurement are compared to verify feasibility of the formula that has guiding significance for determining avoiding routes. Typical factors influencing distance of rockfalls axe analyzed to lay foundation for further research.