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通过离散元方法的数值模拟，首先对清江高坝洲二期碾压混凝土围堰在爆炸载荷下的响应进行了分析，经 与实验结果比较，得到了较合适的材料参数；然后根据这些材料参数并结合实验提供的部分数据，分析了三峡三 期纵向围堰在爆炸载荷条件下的振动速度随离爆源距离衰减的变化规律，以及振动速度随时间的变化规律等。计 算结果表明，三峡三期围堰爆破拆除时振动安全问题集中在纵向围堰拆除，研究爆破载荷作用下纵向围堰的振动 响应是非常重要的。
Based on the numerical simulation of discrete element method, the response of the second phase RCC cofferdam under blast load in Qingjiang River was analyzed. Compared with the experimental results, the suitable material parameters were obtained. Based on these material parameters Combined with some data from the experiment, the variation regularity of the vibration velocity of the Three Gorges Project longitudinal cofferdam under explosive load with the distance from the explosion source is analyzed, and the variation law of the vibration velocity with time is analyzed. The calculation results show that the vibration safety problems during the blasting demolition of the Three Gorges III cofferdam are concentrated on the longitudinal cofferdam demolition. It is very important to study the vibration response of the longitudinal cofferdam under the blasting load.