三峡大学学报（自然科学版）2025，Vol.47Issue(4)：31-37,7.DOI:10.13393/j.cnki.issn.1672-948X.2025.04.005
降雨条件下裂隙边坡滑动失稳的试验分析及机理研究
Experimental Analysis and Mechanism Study of Slope Instability with Cracks Under Rainfall Conditions
摘要
Abstract
In order to deeply analyze the influence of the cracks on the stability of slopes under rainfall condition,the scaled-down rainfall model tests for slopes with vertical and internal cracks are conducted.With the combinations of numerical computation and particle image velocimetry(PIV),the slope safety analysis and slope destabilization mechanism are studied.The results of the study show that:the existence of vertical cracks on the upper edge accelerates rainwater infiltration and groundwater level elevation.The cracks inside the slope will cause rainwater to collect,and then the moisture will migrate to both sides of the fissures,accelerating the sliding of the blocks at the upper edge of the cracks;Considering the time of destabilization of slopes with cracks is 18%～40%earlier than that of slopes without cracks.When both kinds of cracks are considered,the slope factor of stability decreases abruptly,and the landslide occurs rapidly within a short period of time after the calculation of factor of stability less than 1.0;The PIV results show that when the slope with crack is destabilized,the particle motion of the slope is faster,the induced sliding area is wider,and the damage is stronger than that without cracks.The results can be used as an important reference for the determination of slope safety and landslide warning under rainfall conditions.关键词
降雨/裂隙/模型试验/稳定性系数/粒子图像测速法Key words
rainfall/cracks/model test/factor of stability/particle image velocimetry分类
土木建筑引用本文复制引用
卢功臣,虞子楠..降雨条件下裂隙边坡滑动失稳的试验分析及机理研究[J].三峡大学学报（自然科学版）,2025,47(4):31-37,7.基金项目
国家重点研发计划项目(2017YFD0800501) （2017YFD0800501）
