MatDEM-based investigation of shovel-scraping effect on Yigong landslide
In this study,we examine the influence of scouring action on the formation and debris flow of the Yigong landslide by using the discrete element software MatDEM.We consider the complex process of formation of debris flow due to the landslide and the difficulty of analyzing the mechanism of the scouring action.We used data on elevation to construct a three-dimensional geological model of the Yigong landslide in MatDEM at a scale of 1∶1 according to the topography of the area.We used the built-in function for the training parameters in the software to determine the relevant macroscopic and microscopic parameters.We then divided the Yigong landslide into two cases,local scraping and full-scale scraping,and set-up a control group to separately investigate the effects of their occurrence in different areas of the slope on the formation of the Yigong landslide.The results showed that when scraping occurred in the local area,the slide of the avalanche had a lifting and an uplifting effect on the base material,which gained a large amount of kinetic energy that instantaneously increased its velocity.When scraping occurred in the lower part of the slope,the velocity of the slide increased,while the material at its leading edge was pushed forward when scraping occurred at this point.This is called the"ploughing"effect.When scraping occurred onthe landslide,the velocity of the slide increased significantly,and this in turn promoted the formation of debris flows and led to greater damage.The results of this study provide a reference for analyzing the formation of debris flows due to landslides.
万方数据
维普
