›› 2015, Vol. 36 ›› Issue (5): 1380-1388.doi: 10.16285/j.rsm.2015.05.021

• 岩土工程研究 • 上一篇    下一篇

坡脚型与偏转型地震滑坡运动距离及地形因素作用

樊晓一1, 2,冷晓玉1,段晓冬1   

  1. 1.西南科技大学 土木工程与建筑学院,四川 绵阳 621010;2.成都理工大学 地质灾害防治与地质环境保护国家重点实验室,四川 成都 610059
  • 收稿日期:2013-12-25 出版日期:2015-05-11 发布日期:2018-06-13
  • 作者简介:樊晓一,男,1974年生,博士,教授,主要从事岩土工程及地质灾害方面的教学与研究工作。
  • 基金资助:

    国家自然科学基金项目(No. 41272297);中国博士后科学基金面上资助(No. 2013M531943);四川省科技厅项目(No. 2014JY0121);四川省教育厅重点项目(No. 14ZA0095)。

Influence of topographical factors on movement distances of toe-type and turning-type landslides triggered by earthquake

FAN Xiao-yi1, 2, LENG Xiao-yu1, DUAN Xiao-dong1   

  1. 1. School of Civil Engineering and Architecture, Southwest University of Science and Technology, Mianyang, Sichuan 621010, China; 2. State Key Laboratory of Geo-hazard Prevention and Geo-environment Protection, Chengdu University of Technology, Chengdu, Sichuan 610059, China
  • Received:2013-12-25 Online:2015-05-11 Published:2018-06-13

摘要: 运动距离作为滑坡防灾减灾的主要评价指标之一,不仅受到滑坡体积和落差的控制,还与滑坡的下垫面场地的地形作用相关。通过分析坡脚型和偏转型两类典型的地震滑坡运动特征,研究了滑坡体积V、落差 、坡度差 和偏转角度 对最大垂直运动距离H、水平运动距离L以及坡脚以下或偏转后的水平运动距离 的作用。由于偏转型滑坡受偏转前、后坡度和偏转角度对运动距离的共同影响,导致 指标小于坡脚型滑坡,而两类滑坡的 的均值较为一致,表明地形因素对不同类型滑坡的水平运动参数的作用具有一致性特征。分别建立了体积、落差与地形参数的坡脚型和偏转型滑坡运动距离拟合方程。拟合方程的参数指标表明:体积对H的作用指数较小,体现了高位滑坡的运动特征; 对 的影响指数较小;坡脚型滑坡的坡度 对运动距离的影响指数都较为显著,偏转角度 对偏转型滑坡的 的影响较为显著。研究结果为滑坡运动距离的预测和地形因素控制提供了参考,并且对于坡脚型和偏转型滑坡运动距离的模拟和机制研究而言,不应忽略坡脚坡度差和偏转角度的作用。

关键词: 坡脚型滑坡, 偏转型滑坡, 运动距离, 坡脚坡度差, 偏转角度

Abstract: The movement distance of seismic-triggered landslide is one of the important assessment indexes for prevention and mitigation of landslides disaster, and it is not only controlled by landslide volume and drop, but also related to the topographical factor. Here the slope toe-type and turning-type landslides are analyzed and the influence of sliding volume V, drop , slope gradient and turning direction angle is studied on the maximum vertical movement distance H, transitional movement distance L, and transitional movement distance under the slope toe or after the turning . The results indicate that the apparent friction coefficient H/L of the turning-type landslide is jointly controlled by the gradient and turning direction, and less than that of slope toe-type landslide. The average value of of the toe-type landslide is equal to that of the turning landslide, showing that the influence of topography factor on the transitional movement distances of different types of landslides is similar. Analytical formulations for movement distances of the two types of landslide are developed with respect to the volume, drop and topographical factor of the slides. According to the formulations, it is found that the landslide volume affects trivially the maximum vertical movement distance H, showing the movement characteristics of the high slope-landslide; the drop is not the main factor influencing the horizontal distances under the slope toe or after the turning ; gradient significantly influences the movement distances , and of slope toe-type landslide; and turning direction angle is an important factor controlling the of turning-type landslide. These results can provide references for predicting landslide movement distance and controlling topographical factors, highlighting the importance of the slope gradient and the turning directional angle.

Key words: Slope toe-type landslide, turning-type landslide, movement distance, slope toe gradient, turning direction

中图分类号: 

  • P 642.22
[1] 郑光, 许强, 彭双麒. 岩质滑坡−碎屑流的运动距离计算公式研究[J]. 岩土力学, 2019, 40(12): 4897-4906.
[2] 唐 然,许 强,吴 斌,范宣梅,. 平推式滑坡运动距离计算模型[J]. , 2018, 39(3): 1009-1019.
[3] 黄小福,张迎宾,赵兴权,余鹏程,邢 昊,张 珏,陈岩岩,. 地震条件下危岩崩塌运动特性的初步探讨[J]. , 2017, 38(2): 583-592.
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