摘要
本文采用RFA落石分析软件对瓦厂特大桥陡崖落石进行模拟分析,得出如下结论:(1)当落石直径一定时,落石对桥墩的冲击高度、落石最大冲击能量、最大旋转能量、最大平移速度随落石落点高度上升而增高,落石最大旋转速度与落石高度无明显规律;(2)落石高度一定时,落石对桥墩的冲击高度、落石最大冲击能量随落石直径增大而增高,落石最大旋转能量跟落石直径变化无明显变化规律,落石最大旋转速度随落石直径减小而增大,落石的最大平移速度与落石直径大小无关。最后根据落石动量、动能将陡崖落石分为5个危险区,并分区提出了陡崖防护治理措施。
In this paper,RFA rockfall analysis software is used to simulate and analyze the cliff rockfall of Wachang Super Major Bridge,and the following conclusions are drawn:(1)When the diameter of the rockfall is certain,the impact height of the rockfall on the pier,and the maximum impact energy,the maximum rotation energy and the maximum translational velocity of the rockfall increase with the increase of the height of the falling point,but there is no obvious relationship between the maximum rotation speed of the rockfall and the rockfall height.(2)When the height of the rockfall is certain,the impact height of the rockfall on the pier and the maximum impact energy of the rockfall increase with the increase of the rockfall diameter,while the maximum rotation speed of the rockfall increases with the decrease of the rockfall diameter;the maximum rotation energy of the rockfall has no obvious relationship with the change of the rockfall diameter,and the maximum translational velocity of the rockfall is unrelated to the rockfall diameter.Finally,5 hazard zones are proposed according to the momentum and kinetic energy of the rockfall,and respective cliff protection measures for each zone are put forward.
作者
程云
郑六益
莫默
王亮
CHENG Yun;ZHENG Liuyi;MO Mo;WANG Liang(Guiyang Branch of China Railway Eryuan Engineering Group Co.,Ltd.,Guiyang 550002,China)
出处
《高速铁路技术》
2022年第3期24-29,共6页
High Speed Railway Technology
关键词
陡崖落石
模拟分析
运动特性
危险性分区
cliff rockfall
simulation analysis
motion characteristics
hazard zoning
