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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 effectively prevent the roller ramp damage on the highway slope, a free-falling analysis model for the movement of the roller stone is established, the horizontal movement distance of the roller after the roller landing is calculated, and the impact energy of the roller at the barrier is deduced by the law of conservation of energy, Can determine a reasonable way of protection. The calculation results show that the horizontal movement distance (2.156 m) after the roller hit the slope is less than the horizontal distance (2.820 m) from the collision point to the road edge, and the impact energy of the roller flying to the ground is 132 kJ. The model is AXI- 015 (protection level of 150 kJ) passive protective network, can be an effective protection of the roller ramp on the highway.