高速公路坡面滚石自由飞落分析模型  

Free rolling model of stone on expressway slope

作　　者：徐世强[1,2] 折学森[2] 王思长[2] 

机构地区：[1]长安大学理学院,陕西西安710064 [2]长安大学公路学院,陕西西安710064

出　　处：《交通运输工程学报》2011年第2期14-17,共4页Journal of Traffic and Transportation Engineering

基　　金：陕西省自然科学基金项目(2007E204)

摘　　要：为了有效防治高速公路边坡坡面滚石破坏,建立了滚石运动自由飞落分析模型,计算了滚石落地后的水平运动距离,由能量守恒定律推导了滚石在防护栏处的撞击能,并由撞击能确定合理的防护方式。计算结果表明:滚石撞击坡面后的水平运动距离(2.156 m)小于撞击点到公路路缘的水平距离(2.820 m),滚石飞落至地面的撞击能为132 kJ,设计采用型号为AXI-015(防护能级为150 kJ)的被动防护网,可对高速公路坡面滚石灾害进行有效防护。In order to control rolling stone damage on expressway slope,a free rolling model of stone was built.The horizontal moving distance of stone was calculated while reaching the ground.Based on the energy conservation law,the impact energy of rolling stone to guardrail was deduced,and the reasonable way of protection was defined according to the energy.Computation result shows that the horizontal distance（2.156 m） is less than the distance between impact point and road curb（2.820 m）,the impact energy is 132 kJ,so passive protecting mesh named AXI-015（its protecting level is 150 kJ）can provide effective protection,and the model is feasible.6 tabs,2 figs,10 refs.

关 键 词：路基工程 岩质边坡 坡面滚石 滚石轨迹方程 防护网 

分 类 号：U416.14[交通运输工程—道路与铁道工程]