| 锦屏一级水电站高边坡开挖爆破动力稳定分析 |
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| 作者单位： | ;1.西南交通大学;2.西南交通大学 成都610031;3.成都610031 |
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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。
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| 关 键 词： | 时程法 高边坡 开挖爆破 动力稳定分析 锦屏一级水电站 |
DEMOLITION OF A REINFORCED CONCRETE CHIMNEY WITH A HEIGHT OF 120 METERS IN A LONG AND NARROW AREA BY CONTROLLED BLASTING |
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| Affiliation: | , 3. Zhengzhou Mapping College, Zhengzhou, Henan 450062, China |
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| Abstract: | The problems of touchdown impact vibration and directional precision must be solved when a chimney with a height of 120 meters in a long and narrow area is demolished by directional blasting.In the light of blasting demolition of a reinforced concrete chimney with a height of 120 meters in the Emei Aluminum Factory,the tackle of several important problems such as soot door,recoil and eccentricity is introduced and the method and technological measures for control of directional precision are proposed.In addition,the calculation of blasting cut's parameters,check of safe vibration distance and the experience of authors are presented. |
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| Keywords: | Chimney Directional blasting Atmospheric disturbance Touchdown vibration |
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