To research the risk of barrier dam induced by landslide, Caijiaba landslide was studied as an example in the present study. The burst risk was assessed as well. To begin with, the region scope of quasi-landslide was obtained by stability calculation. Then the landslide process is analyzed by Partical Flow Code (PFC3D). On the basis of the numerical simulation results, the forming mechanism and motion characteristics of the barrier dam were analyzed. Subsequently, the Classical assessment model was employed to evaluate the burst risk of the barrier dam. Numerical results show that the highest body reaches 68.1 m. As a result, the riverway will be blocked by the debris, forming a weir dam. In addition, the body shape along upstream resembles a wedge. The fastest part of the sliding body is 8 m/s, and some of the debris flow stay on the hill still.

为了研究滑坡引起的障碍坝风险，本研究以菜家坝滑坡为例。还评估了爆发风险。首先，通过稳定性计算获得准滑坡的区域范围。然后通过Partial Flow Code（PFC3D）分析滑坡过程。根据数值模拟结果，分析了围堰的形成机理和运动特性。随后，采用经典评估模型来评估屏障大坝的爆破风险。数值结果表明，最高体达到68.1 m。结果，河道将被杂物阻塞，形成堰坝。另外，沿上游的身体形状类似于楔形。滑动体最快的部分是8 m / s，一些泥石流仍停留在山上。