土工基础

›› 2013, Vol. 27 ›› Issue (6): 18-21.

• 工程实录 • 上一篇    下一篇

向家坝水电站二纵下游混凝土围堰拆除爆破设计优化

李名松   

  1. (葛洲坝易普力股份有限公司，重庆 400023）
  • 收稿日期:2013-10-23 出版日期:2013-12-20 发布日期:2013-12-21
  • 作者简介:李名松（1972-），男，湖北阳新人，高级工程师，学士学位，葛洲坝易普力股份有限公司副总经理，研究方向工程爆破技术。

Downstream Longitudinal Concrete Cofferdam Demolition Blasting of in the Second stage Project of Xiangjiaba Hydropower Station

LI Mingsong   

  1. （Gezhouba Explosive Co., Ltd., Chongqing 400023）
  • Received:2013-10-23 Online:2013-12-20 Published:2013-12-21

摘要： 向家坝水电站二期纵向混凝土围堰下游段为碾压混凝土围堰，根据工程要求需进行爆破拆除。对围堰拆除爆破方案设计、比选，以振动控制和堰内堆渣量为主要评价指标，采用以坡面倾斜孔为主的钻爆方案。采用高精度导爆管雷管进行大规模的爆破网路设计，使最大单段药量产生的振动满足爆破安全的要求，同时采取必要的安全防护设计确保水电站主要设施的安全。

关键词: 拆除爆破, 混凝土围堰, 爆破网路, 安全防护

Abstract: The downstream section of the longitudinal Roller Compacted Concrete (RCC) cofferdam in the secondstage construction in Xiangjiaba Hydropower Station needs to be removed by blasting. In this paper, the design and selection of the cofferdam demolition blasting methods, vibration control criteria and the quantity inside the cofferdam are presented. The selected drilling and blasting plan was the method with predominant inclined boreholes. This method optimizes the design of blasting scheme and parameters, and utilizes the highprecision detonating tube detonator on a large scale blasting network design. Under this design, the vibration resulted from the largest single blasting meets the requirement.  Other safety assurance measures are also adopted to ensure the safety.

Key words: Demolition Blasting, Concrete Cofferdam, Blasting Network, Safety Assurance