基于Rocfall模拟的高陡岩质建筑边坡孤石滚落防治方法探讨
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摘要
珠三角地区花岗岩风化球广泛分布发育,当坡体遇连续降雨时,花岗岩风化球底部残积土遇水软化、崩解,不断受雨水侵蚀,在重力作用下失稳形成危石滚落成为近年来高陡岩质建筑边坡常见的失稳形态。以某工程实例为背景,基于Rocfall软件模拟计算,模拟还原了孤石滚落路径。在此基础上,利用Rocfall软件对孤石滚落路径、速度、能量的模拟,探讨了孤石滚落的防治方法,分析了分级修坡减小落石危害的作用。根据落石冲击能量,应注意提前清除大块孤石或危岩体。当采用刚性拦石墙时,应设置缓冲层,避免滚石击破。
Spherical weathering granite is widely distributed and developed in the Pearl River Delta region. When the slope body encounters continuous rainfall,the residual soil at the bottom of the weathering stones softens and disintegrates under water,and is constantly eroded by rain. Under the action of gravity,that the unstable rocks roll down becomes a common form of instability of high and steep rock construction slopes in recent years. Taking an engineering example as the background and based on Rocfall software simulation calculation,the rolling path of orphan rocks is simulated and restored. using Rocfall software to simulate the path,speed and energy of rockfall,the prevention and control methods of rockfall are discussed,and the effect of stepped slope to reduce the hazard of rockfall is analyzed. According to rockfall impact energy,attention should be paid to early removal of large boulders and dangerous rock mass. When rigid retaining wall is used,buffer layer should be set up to avoid breaken by rolling stone.
Spherical weathering granite is widely distributed and developed in the Pearl River Delta region. When the slope body encounters continuous rainfall,the residual soil at the bottom of the weathering stones softens and disintegrates under water,and is constantly eroded by rain. Under the action of gravity,that the unstable rocks roll down becomes a common form of instability of high and steep rock construction slopes in recent years. Taking an engineering example as the background and based on Rocfall software simulation calculation,the rolling path of orphan rocks is simulated and restored. using Rocfall software to simulate the path,speed and energy of rockfall,the prevention and control methods of rockfall are discussed,and the effect of stepped slope to reduce the hazard of rockfall is analyzed. According to rockfall impact energy,attention should be paid to early removal of large boulders and dangerous rock mass. When rigid retaining wall is used,buffer layer should be set up to avoid breaken by rolling stone.
引文
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