Assessing the protective function of a forest against rockfall using 3-D DDA
Rockfall is the most frequent major hazard in mountainous regions.Forest stands can play an efficient protective role to potential unstable rock masses on active rockfall slopes.This study aims at assessing their protective function and at investigating the role of different stand parameters in this function.To achieve these objectives,we first introduced a special tree element into 3-D DDA considering the amount of energy a tree can dissipate from rockfall impactions.It follows an exponential relationship to diameter at breast height from field experiment in literature.Then,we evaluated the rockfall risk and compared the results with field investigation in terms of runout zone,velocity and jump height.Further,we investigated the variations of simple forest stand parameters: the number of trees per hectare and diameter at breast height.It has been shown that 3-D DDA program is applicable and effective to estimate rockfall dynamics with trees and has practice significant to the prevention design.
L.ZHENG
Sichuan University, Chengdu, Sichuan, China
国际会议
The 12th International Conference on Analysis of Discontinuous Deformation(第12届非连续变形分析国际大会)
武汉
英文
262-262
2015-10-16（万方平台首次上网日期，不代表论文的发表时间）