常规面板堆石坝坝前水下防爆距离的确定和影响因素

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振动与冲击 ›› 2013, Vol. 32 ›› Issue (6) : 78-83.

论文

常规面板堆石坝坝前水下防爆距离的确定和影响因素

张启灵1，2，李端有1，2，李波1，2

作者信息 +

Underwater explosion protection range of conventional concrete face rockfill dam and its influencing factors

ZHANG Qi-ling1，2, LI Duan-you1，2, LI Bo1，2

Author information +

文章历史 +

摘要

鉴于混凝土面板堆石坝较弱的抗爆性能，确定合理的坝前水下防爆距离，为坝前水下反恐安全防护设计和预警监测范围提供参考是必要的。选取常规100m级高的面板堆石坝作为分析对象，借助有限元程序Abaqus/Explicit，采用声学介质描述库水，采用大坝-地基-库水系统有限元模型，主要考虑坝前不同距离发生10kg TNT当量水下爆炸，研究混凝土面板的损伤破坏情况及其影响因素。计算结果表明：堆石体变形模量Er、面板竖缝和周边缝摩擦系数fj、面板与堆石体之间摩擦系数fb等三个参数在常规范围内取值不会对最终面板破坏的预测产生质的影响。得到结论：坝前水下防爆距离Dp定为200m是合适的。

Abstract

In view of the weak knock resistance of concrete face rockfill dam (CFRD), it is essential to determine a rational underwater explosion protection range before dam in the interest of design of anti-terrorism safety protection, underwater monitoring and prewarning. A conventional 100m-high CFRD was analyzed using Abaqus/Explicit. The structural damage and failure of concrete face and their influencing factors were focused on. The dam-foundation-water interaction was considered and the water was simulated using acoustic element. Several explosive distances were supposed with a 10kg-TNT charge underwater explosion before dam. The result shows that different conventional assignments of the three parameters including rockfill’s deformation modulus Er, friction factor of vertical and peripheral joints fj and friction factor of contact between concrete face and rockfill fb do not exert an essential influence on the prediction of concrete face’s structural failure. It is concluded that the rational underwater explosion protection distance Dp before dam should be determined as 200m.

导出引用

张启灵;李端有;李波;. 常规面板堆石坝坝前水下防爆距离的确定和影响因素[J]. 振动与冲击, 2013, 32(6): 78-83

ZHANG Qi-ling;LI Duan-you;LI Bo;. Underwater explosion protection range of conventional concrete face rockfill dam and its influencing factors[J]. Journal of Vibration and Shock, 2013, 32(6): 78-83