锦屏一级水电站高边坡开挖爆破动力稳定分析
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摘要
将时程法引入滑裂面的抗剪断强度比值法中,以某个爆破步长进行整个爆破计算,得到了潜在滑动体的稳定系数随爆破振动荷载作用下的变化过程。利用该方法对锦屏一级水电站左岸EL.1885m以上边坡开挖爆破进行动力稳定性分析,计算结果较好地反映了边坡稳定性在爆破过程中的变化过程,为优化爆破参数、指导减振措施和边坡支护提供了依据。本研究的成果对以后类似的特高陡边坡爆破开挖分析具有积极的指导意义。
With the introduction of time history analysis method to ratio method of shearing strength of rock,the stability factor of the potential slide mass was achieved under the effect of blasting vibration load by analyzing the whole blasting vibration process at a certain time step.High slope excavation blasting at the left bank over EL.1885m of Jinping-I Hydropower station was evaluated by using ratio method of shearing strength about dynamic stability,which well reflected the variation process of the slope stability during excavation blasting,and provided a reference for the optimization of blasting parameters,guidance of vibration reducing measures and slope retaining.The results were very significant for analyzing similar highslope excavation blasting work in the future.
With the introduction of time history analysis method to ratio method of shearing strength of rock,the stability factor of the potential slide mass was achieved under the effect of blasting vibration load by analyzing the whole blasting vibration process at a certain time step.High slope excavation blasting at the left bank over EL.1885m of Jinping-I Hydropower station was evaluated by using ratio method of shearing strength about dynamic stability,which well reflected the variation process of the slope stability during excavation blasting,and provided a reference for the optimization of blasting parameters,guidance of vibration reducing measures and slope retaining.The results were very significant for analyzing similar highslope excavation blasting work in the future.
引文
[1]许红涛,卢文波,周创兵,等.基于时程分析的岩质高边坡开挖爆破动力稳定性计算方法[J].岩石力学与工程学报,2006,25(11):2213-2219.
[2]陈玲玲陈敏中,钱胜国.岩质陡高边坡地震动力稳定分析[J].长江科学院院报,2004,21(1):33-35.
[3]刘汉龙,费康,高玉峰.边坡地震稳定性时程分析方法[J].岩土力学,2003,24(4):553-556.
[4]许红涛,卢文波,周小恒.爆破震动场动力有限元模拟中爆破荷载的等效施加方法[J].武汉大学学报(工学版),2008,41(1):67-71.
[2]陈玲玲陈敏中,钱胜国.岩质陡高边坡地震动力稳定分析[J].长江科学院院报,2004,21(1):33-35.
[3]刘汉龙,费康,高玉峰.边坡地震稳定性时程分析方法[J].岩土力学,2003,24(4):553-556.
[4]许红涛,卢文波,周小恒.爆破震动场动力有限元模拟中爆破荷载的等效施加方法[J].武汉大学学报(工学版),2008,41(1):67-71.
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