Numerical Analysis Of Landslide Movement Behavior And Array Baffle Blocking Landslide Debris Flow Impact

Geological disasters such as landslides and debris flow from landslides pose a huge threat to people's lives and property.In this study,the discrete element method(PFC3D)was used for numerical simulation,and the influence of the movement process of the landslide and the parameter setting of the array baffle on the impact of the sliding particles was analyzed.The main research work is as follows:Firstly,the whole motion process of the sliding body from the beginning of disintegration to the stop of motion accumulation is simulated and analyzed.The movement shape changes of the sliding body at different moments were investigated.The number of particle contact inside the sliding body was recorded,and the variation of the energy of the sliding body with time was studied.By setting monitoring points at relevant feature points,motion characteristic parameters such as total speed,longitudinal speed and longitudinal position of different parts of the sliding body are obtained.The final conclusion is drawn: the motion state of each part of the sliding body is greatly affected by the initial position;the sliding body particles not only have back and forth motion but also lateral motion;the difference in energy variation in the sliding body is large.Then,the influence of the parameter setting of the array baffle on the impact of the sliding particles is simulated and analyzed to understand the interaction between the sliding particles and a series of baffles.After analysis and summary,the results show that when the array baffle is in other conditions In the same situation: increasing the number of rows of the array baffles can effectively improve the barrier function of the baffle system to the sliding particles,and more effectively consume the kinetic energy of the sliding particles;changing the spacing of the baffles is another improvement.An effective method of energy efficiency,the larger the spacing of the baffle rows,the more energy is consumed;changing the spacing of the baffle columns can also significantly affect the dissipation of the baffle system for the particle energy.The smaller the baffle column spacing,the smaller the particles are.The more obvious the clogging phenomenon in the plate gap,the stronger the ability to naturally consume the kinetic energy of the sliding body particles;as the baffle placement position d increases,the sliding body particles can also consume more energy when striking the baffle;Interchange between the rows of baffles can also affect the ability of the baffle system to dissipate particulate kinetic energy.Finally,the shape of the baffle has been changed.It is found that under the condition of setting different shape baffles,the impact force of the baffle and the building and the kinetic energy of the sliding body particles are different,and their The law of variation has a strong correlation with the effective impact area of the shape baffle,and the interaction between the baffles and the shape of the baffle also interfere with the ability of the system to consume the energy of the buck.