中文摘要：

大块石冲击是造成泥石流拦挡坝破坏的主要因素之一,为了提高拦挡坝的抗冲击能力,提出一种带连续防撞墩的新型泥石流拦挡坝。利用ANSYS/LS-DYNA,对泥石流大块石冲击新型坝和重力式拦挡坝进行了数值模拟,分别得出了新型坝和重力坝的冲击动力响应并进行对比分析。此外,考虑不同的防撞墩尺寸、布置间距以及不同的后部坝体厚度,对新型坝进行参数分析。结果表明：新型坝提高了自身抗冲击性能的同时还提高了材料强度利用率,其明显优于普通坝。防撞墩的截面高度、布置间距以及后部坝体的厚度对新型坝的抗冲击性能和整体刚度影响很大,因此在新型坝设计中必须综合考虑以上因素。

英文摘要：

One of the principal factor that destroys debris flow dam is the impact of big stone.In order to enhance the shock resistance of the dam,a kind of new dam with continuous crash bearer is proposed.ANSYS/LS-DYNA is applied to conduct the numerical simulation of the process that big stone impact the new dam and gravity dam,and then their impulsive dynamic responses are comprised.In addition,considering the different size,layout spacing of crash bearer and different thicknesses of the dam in the back,parameter analysis of the new dam is done.Results indicate that the new dam improves its shock resistance while also improves the utilization of the material strength,which is much better than normal gravity dam.The section height,layout spacing of crash bearer and the thickness of the dam in the back have a great influence on the shock resistance and integral rigidity of the new dam,therefore,all these factors should be take into account in designing of the new dam.