摘要
采用Rocfall程序开展了汶川县克枯乡6个具有代表性质量的落石进行路径模拟,分析了不同质量下落石落点、跳跃高度、运动总能量以及水平运动速度等落石运动特征。模拟结果显示,落石弹跳高度、落石运动总能量和水平运动速度,均在水平位置69.1 m处以及水平位置156.9 m后方出现明显的降低现象,在这两个位置设置防治措施,将承受更小的冲击力。从保护居民点角度出发,建议在水平位置157.0 m设置高度为2 m,可承载1 000 kJ总能量的拦石网;而从保护规划开发地段角度出发,建议在水平位置69.1 m设置高6.0 m,可承载4 000 kJ能量的拦石网。
Trajectory simulation for six rockfalls of representative mass in Keku Country, Wenchuan County, was conducted by using Rocfall Program, then rockfall end-points, bounce height, total kinetic energy and the translational velocity for different mass were analyzed. The simulation results showed that the bouncing height, total energy and horizontal motion velocity of the falling rocks all decreased significantly at 69.1 m and 156.9 m behind the horizontal position, therefore, the control measurement would bear much smaller impact at these two positions. From the point of protecting residence, this paper suggested to settle safety net system with the height 2.0 m and absorption of 1 000 kJ at 157.0 m;otherwise, from the view of protecting planning and developing area, safety net system with the height 6.0 m and absorption of 4 000 kJ at 69.1 m was suggested.
作者
赵斌
ZHAO Bin(Chongqing-Wanzhou Railway Co.Ltd.,Chongqing 400037,China)
出处
《铁道建筑技术》
2023年第1期75-79,共5页
Railway Construction Technology
基金
中国铁路总公司科技研究开发计划项目(K2018G057)。
