Failure Mechanism Analysis of Cracked Slopes based on Particle Imaging Video(PIV)
Under rainfall conditions,the rainwater infiltration rate of cracked slopes is faster and the slope stability is lower,which can easily induce landslides.For cracked slopes,an indoor model test is constructed to analyze in detail the destabilizing trend of cracked slopes under rainfall,combine Particle Imaging Video(PIV)to capture the flow state of particles and quantify the crack hazard to determine the specific sliding state under different rainfall intensities.The results indicate that:the model experiment effectively restored the failure state,and the PIV calculation accurately provided various motion state information of particles;by increasing the rainfall intensity from 50 mm/h to 90 mm/h,the occurrence time of landslides was accelerated by 85%,and the maximum flow velocity of particles was increased by 68%;The presence of cracks further exacerbates the damage,and the sliding distance of slopes without cracks also increases accordingly,the sliding distance of the slope considering vertical cracks increased by 11%;The slope considering internal cracks has increased by 20%;Both types of cracks are considered to have increased by 25%.This study further reveals the failure mechanism of cracked slopes under rainfall,providing important reference for the analysis of related crack effects.
万方数据
维普
