Formation mechanism and movement characteristic of a high altitude collapse on the No.108 National Highway in west Sichuan Province
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摘要: 2007年5月25日于川西108国道某段发生的高位崩塌造成了重大人员伤亡和财产损失。综合地质调查、三维激光扫描技术、爆破振动效应分析以及历史崩塌与降雨关系的统计分析,得出了地形高陡、岩体破碎及降雨诱发等是崩塌产生的主要原因,爆破振动对其也有轻微间接影响。根据边坡形态及塌落高度,运用运动学原理及能量法还对崩塌体的撞击速度及冲击力进行了计算分析。Abstract: A high altitude collapse on the No.108 National Highway in west Sichuan Province took place in May 25,2007,which leaded to heavy casualties and loss.By comprehensively using many kinds of means,such as geological survey,3D laser scanning technology,analysis of blasting vibration effects and statistical analysis on many historical collapse and rainfall,the paper objectively sets forth the reasons to the collapse,including high steep terrain,fractured rock mass and rainfall trigging,and so on.At the same time,blasting vibration is a minor and indirect factor to the collapse.Based on the shape of the slope and height of the collapse,through kinematics theory and energy method,the authors calculate velocity of the falling rock and impulsive force that the falling rock impacted the bus.
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Key words:
- collapse /
- inducing factor /
- formation mechanism /
- movement track
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