【摘要】 分析了爆破开出漏斗后堰体在水中的刚体运动规律 ,给出了堰体翻转的必要条件 ,得出了运动过程中堰体翻转角度和角速度随时间的变化曲线 ,讨论了切口深度和位置及水的阻力对翻转效果的影响。结果表明 ,形成足够深度的开口条件下 ,堰体完全可以在重力作用下实现翻转更多还原

【Abstract】 In terms of the overturning program of demolishing the third stage roller compacted concrete cofferdam in three Gorge, the dynamic pattern of cofferdam is analysed after blasting shapes a gap.The necessary condition of overturning is given.The angle and angle velocity are given in the duration of cofferdam′s overturning.The effect of length and height of gap on overturning is discussed.The results show that ,only if the gap’s length is enough, cofferdam can overturn under gravity.The effect of water resistance on overturning is also considered.It is illustrated that water resistance has little effect on overturning in real cofferdam.更多还原