摘要
为了进一步认识山阳偏转型滑坡的运动特征,基于离散元数值方法对滑坡运动堆积过程进行模拟分析。结果表明:滑坡体前缘各监测点的岩土体的运动空间大小、能量传递效率及受到偏转阻止作用大小的不同是前缘岩土体运动速度表现出显著差异的主要原因;滑坡体中部各监测点的岩土体作为滑坡前、后缘岩土体能量传递的主要媒介,其运动速度表现出多次加速特征;滑坡体后缘各监测点的岩土体则主要经历加速和减速2个运动阶段。根据滑坡的运动速度和水平运程可将山阳滑坡划分为高速近程滑坡,其堆积体厚度分布总体表现为沿运动方向呈先增加后减小的变化趋势。
Understandings on the movement characteristics of turning-type landslide in Shanyang county,Shaanxi Province,are obtained through discrete element analysis.The notable difference of movement velocity in the front edge of landslide lies in the differences in motion space,energy transfer,and deflection and blocking effect at each monitoring point in the leading edge of the landslide.The rock and soil mass in the middle of the landslide,as the major medium of energy transfer between the leading edge and the trailing edge,experienced multiple accelerations.The monitoring points in the trailing edge mainly experienced two stages,namely,acceleration and deceleration.Affected by the turning force,Shanyang landslide is a short-range landslide with high velocity according to the movement speed and horizontal distance,and the thickness of the accumulation body increased at first and then decreased along the motion direction.
作者
杨海龙
樊晓一
裴向军
YANG Hai-long;FAN Xiao-yi;PEI Xiang-jun(State Key Laboratory of Geohazard Prevention and Geoenvironment Protection,Chengdu University of Technology,Chengdu 610059,China;School of Civil Engineering and Architecture,Southwest University of Science and Technology,Mianyang 621010,China)
出处
《长江科学院院报》
CSCD
北大核心
2020年第2期106-111,118,共7页
Journal of Changjiang River Scientific Research Institute
基金
国家自然科学基金项目(41572302,41877524)
国家重点研发计划项目(2017YFC1501002)
四川省重点实验室项目(18kfgk10)。
关键词
偏转型滑坡
离散元法
运动速度
偏转阻止效应
堆积特征
turning-type landslide
discrete element method
movement velocity
deflection and blocking effect
accumulation characteristics
