吴新霞;张文煊;刘美山;
WU Xin-xia1,2,ZHANG Wen-xuan1,2,3,LIU Mei-shan1,2,3(1.Yangtze River Scientific Research Institute,Wuhan 430010,China;2.Key Laboratory of Geotechnical Mechanics and Engineering of the Ministry of Water Resources,Wuhan 430010,China;3.University of Science and Technology of China,Hefei 230027,China)

• 1:长江科学院
• 2:长江科学院
• 3:长江科学院 武汉430010
• 4:水利部岩土与工程重点实验室

摘要(Abstract)：

三峡三期RCC围堰的爆破区位于水下30余米处,爆破条件与陆上混凝土爆破有着本质的区别,不能盲目套用陆上混凝土爆破的常规设计参数,需要对水下固体介质爆破设计参数进行合理确定。本文分析了炸药在半无限固体介质中爆破破坏物理过程,比较了水下和陆上固体介质工程爆破的主要差异,分析了水体对爆破效果的影响,探讨了水下爆破装药量的计算方法,得出三峡三期RCC围堰预埋药室的水下爆破设计装药量应是陆地爆破的2.33⁴.08倍,该结果与试验结论一致。
The blasting area of the Three Gorges Project 3rd stage RCC cofferdam demolition was at more than 30m depth below the water.In this case,the blasting parameters were totally different from the ones used in ground blasting,and needed a reasonable design regarding the deep water solid medium rather than the use of the design parameters for the ground blasting without considerations.The paper analyzed the physical damage degree of blasting in half boundless medium,compared the difference of ground blasting with that of under water blasting,discussed the blasting effect resulted from the water,and investigated the calculating method of mass of explosive charge.The calculated mass of explosive charge was 2.33～4.08 times of that needed in ground blasting which was consistent to the result of blasting test.

关键词(KeyWords)： 三峡工程;围堰拆除;混凝土;水下爆破;药量计算
The Three Gorges Engineering;Cofferdam demolition;Concrete; Underwater blasting;Calculation of mass of explosive charge

Abstract:

Keywords:

基金项目(Foundation): 三峡工程三期RCC围堰爆拆项目

作者(Authors): 吴新霞;张文煊;刘美山;
WU Xin-xia1,2,ZHANG Wen-xuan1,2,3,LIU Mei-shan1,2,3(1.Yangtze River Scientific Research Institute,Wuhan 430010,China;2.Key Laboratory of Geotechnical Mechanics and Engineering of the Ministry of Water Resources,Wuhan 430010,China;3.University of Science and Technology of China,Hefei 230027,China)

参考文献(References)：

• [1]陈宝心,杨勤荣.爆破动力学基础[M].武汉:湖北科学技术出版社,2005.
• [2]吴新霞,刘美山,苏利军.长江三峡水利枢纽三期RCC横向围堰爆破拆除混凝土试块水下爆破炸药单耗试验研究(分报告之七)[R].长江水利委员会长江科学院、长江水利委员会长江勘测规划设计研究院,2006.