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地质力学学报:2020,26(1):106-114
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沟谷地形参数对滑坡运动距离的影响研究
(西南科技大学土木工程与建筑学院, 四川 绵阳 621010)
Study on the influence of valley topographic parameter on the moving distance of landslide
(School of Civil Engineering and Architecture, Southwest University of Science and Technology, Mianyang 621010, Sichuan, China)
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投稿时间:2018-12-04    修订日期:2019-06-19
中文摘要: 滑坡运动场地上的沟谷地形,对滑坡运动产生约束、偏转、导流、阻止等作用,导致了滑坡运动距离的差异。根据滑坡滑源区、运移区的运动方向与沟谷堆积区延伸方向的夹角,将沟谷型滑坡划分为沟谷顺直型和沟谷偏转型两种类型。通过建立滑坡体积、沟谷地形参数与运动参数的非线性回归模型,分析体积及地形参数变化率对沟谷型滑坡运动距离变化的影响特征。研究表明:随体积增加,沟谷顺直型和沟谷偏转型滑坡的运动距离差异逐渐增大。体积作为滑坡运动距离的显著性因素,其原因在于滑坡体积在数量级上的差异,而在同一数量级内,体积变化仅对沟谷型滑坡最大水平运动距离变化的影响最大;滑源区和沟谷堆积区坡度的变化对垂直运动距离和堆积区水平运动距离影响大于滑坡体积。偏转角度对沟谷偏转型滑坡运动距离的影响较小,其原因在于沟谷区地形坡度显著影响了偏转角度对滑坡运动距离的作用。研究结果为沟谷型滑坡的致灾程度评估提供了参考依据。
中文关键词: 沟谷地形  运动距离  体积  地形参数  滑坡
Abstract:The valley topography, located on the landslide motion path, can restrain, deflect, divert and prevent the landslide movement and result in the difference of landslide moving distance. The valley topography of landslide is divided into straight-valley and deflection-valley based on the angle between the moving direction of the landslide source area and the migration area and the extension direction of the valley accumulation area. The nonlinear regression models, related to landslide volumes and valley topographic parameters, were deduced. On the basis of the models, the laws that the volumes and the topography parameters influenced on the landslide moving distance were revealed. The results show that, the difference of the moving distance between the straight-valley and deflection-valley landslides increases gradually with the increase of volume. The reason of volume as a significant factor for landslide moving distance lies in the difference of landslide volume in order of magnitude. However, in the same order of magnitude, the volume change only is the greatest influence factor of the maximum horizontal moving distance of valley landslide, and the angle change of the slope is more significant than volume for the vertical moving distance and horizontal moving distance of the accumulative area. The deflection angle is a minor factor for deflection-valley landslide moving distance, because the valley slope significantly affects the effect of the deflection angle on the landslide moving distance. The results provide future reference for the disaster assessment of valley landslide.
文章编号:     中图分类号:P642.22    文献标志码:
基金项目:国家自然科学基金(41877524,41971214);国家重点研发计划资助项目(2018YFC1505401);工程材料与结构冲击振动四川省重点实验室开放基金项目(18kfjk10)
引用文本:
樊晓一,张睿骁,胡晓波.沟谷地形参数对滑坡运动距离的影响研究[J].地质力学学报,2020,26(1):106-114DOI:10.12090/j.issn.1006-6616.2020.26.01.011
FAN Xiaoyi,ZHANG Ruixiao,HU Xiaobo.Study on the influence of valley topographic parameter on the moving distance of landslide[J].,2020,26(1):106-114DOI:10.12090/j.issn.1006-6616.2020.26.01.011

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