张文煊;王文辉;
ZHANG Wen-xuan~(1,2),WANG Wen-hui~(2,3)(1.University of Science and Technology of China,Hefei 230026,China;2.Yangtze River Scientific Research Institute,Wuhan 430010,China;3.Key Laboratory of Geotechnical Mechanics and Engineering of the Ministry of Water Resources,Wuhan 430010,China)

• 1:中国科学技术大学
• 2:长江科学院 合肥230026
• 3:长江科学院
• 4:武汉430010

摘要(Abstract)：

在地下厂房开挖支护过程中,爆破震动控制直接影响到高边墙的稳定及岩锚梁结构安全。本文根据龙滩水电站地下厂房Ⅲ^Ⅶ层开挖爆破震动监测数据,采用统计分析方法,经二元回归计算得到主厂房岩石高边墙、岩锚吊车梁以及已喷护岩石边墙、锚索(杆)墩(头)等防护目标的爆破振速衰减规律经验公式。结果表明,地下厂房开挖过程诱发的爆破震动沿高程H方向总体没有放大现象,但衰减较为缓慢或很缓慢,这为地下厂房工程开挖爆破施工提供了理论依据。
The control of blasting vibration in the excavation of underground powerhouse is the key factor influencing the construction safety of underground powerhouse.Based on the monitoring data of blasting vibration in the excavation of Ⅲ～Ⅶ layers of Longtan hydropower project underground powerhouse,the paper obtained the empirical formula for the attenuation law of blasting velocity by adopting the statistic analysis method accompanied with the duality regression analysis,which involved some protected objects,such as the high side walls and crane beam anchored on rock of main power house,side walls with shotcrete and anchor mound.The results showed that the deep-hole blasting induced vibration gave no evidences of vibration-amplifying effect along the high side walls,and the attenuation of the vibration velocity was relatively slow or very slow.The results obtained offered theoretical foundation for the similar blasting works in excavation of underground powerhouse.

关键词(KeyWords)： 地下厂房;开挖;爆破震动;衰减规律;经验公式
Underground powerhouse;Excavation;Blasting vibration;Attenuation law;Empirical formula

Abstract:

Keywords:

基金项目(Foundation):

作者(Authors): 张文煊;王文辉;
ZHANG Wen-xuan~(1,2),WANG Wen-hui~(2,3)(1.University of Science and Technology of China,Hefei 230026,China;2.Yangtze River Scientific Research Institute,Wuhan 430010,China;3.Key Laboratory of Geotechnical Mechanics and Engineering of the Ministry of Water Resources,Wuhan 430010,China)

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