工程爆破

2008, (03) 21-23

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堰塞湖抢险爆破对坝基及保留堰体的液化影响分析
ANALYSIS OF IMPACT ON LIQUEFYING OF DAM FOUNDATION AND RETAINED WEIR BODY IN EMERGENCY BLASTING OF DAMMED LAKE

张文煊;吴新霞;
ZHANG Wen-xuan1,2,WU Xin-xia2,3(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)

摘要(Abstract):

堰塞湖除险爆破前需对爆破荷载作用下的堰体和堰基是否液化进行判别,避免爆破引起的次生灾害。由滑坡体和河床特性决定了爆破除险主要是复核堰塞湖坝基是否液化。本文针对堰塞湖除险爆破,提出了不产生堰塞坝体及坝基液化的安全爆破振动及孔隙动水压力控制标准,并参考土石围堰爆夯试验成果提出了堰塞坝拆除爆破的振动及孔隙动水压力预报公式。
Prior to the emergency blasting of the dammed lake,whether the foundation and retained body would liquefy or not under the blasting load should be evaluated to avoid a secondary disaster caused by the blasting operation. Knowing the fact that the characteristic of the landslide mass and the river bed that foundation of dammed lake are the predominant factors which may cause the liquefying,the paper proposes the safety blasting controlling standards of vibration and pore hydrodynamic pressure for emergency blasting of dammed lake,and moreover,referring to the experimental achievement of soil-stone cofferdam rammed by blasting,suggests forecast formulas of vibration and pore hydrodynamic pressure for demolished blasting of dammed dam.

关键词(KeyWords): 堰塞湖;抢险爆破;液化;控制标准
Dammed lake; Emergency blasting; Liquefy; Control standard

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作者(Author): 张文煊;吴新霞;
ZHANG Wen-xuan1,2,WU Xin-xia2,3(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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