基于UDEC的高位滑坡运动参数影响因素研究
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成都理工大学,成都理工大学,成都理工大学

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P642.22

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四川省青年科技创新研究团队专项计划项目(2017TD0018);国家自然科学基金项目(41572291);地质灾害防治与地质环境保护国家重点实验室团队项目(SKLGP2016Z001)


Research on Influencing Factors of Movement Parameters of High Landslide Based on UDEC
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Chengdu University of Technology,,

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    摘要:

    滑距和滑速这类运动参数历来被众多学者作为评价高位滑坡致灾范围和致灾强度的关键性指标。斜坡坡形特征、坡面物理力学性质等是这些指标的影响因素,本文通过对17个典型高位滑坡资料的收集与分析,资料显示高位滑坡多具有上陡下缓的坡形特征(折线形坡),本文将反映高位滑坡剪出口下方坡形特征的陡坡、缓坡的坡度与反映坡面性质特征的内聚力与内摩擦角作为运动参数的影响因素进行研究,根据资料并结合经验确定了各影响因素的变化范围,按照正交试验原理设计UDEC数值模拟试验,利用极差和方差分析研究各因素对高位滑坡滑距、滑速的影响性。结果表明:极差结果显示影响滑距的主次顺序为缓坡度>陡坡度>>内聚力=内摩擦角,影响滑速的主次顺序为陡坡度>>缓坡度>内聚力>内摩擦角;方差结果显示缓坡度、陡坡度为影响滑距的高度显著因素,陡坡度为影响滑速的显著因素,其余均为不显著因素;滑坡的运动参数受场区地形条件的影响显著,因此,在进行高位滑坡致灾范围与强度评价时,应主要考虑剪出口下方的坡形。

    Abstract:

    The movement parameters such as movement distance and movement speed have been used by many scholars as key indicators for evaluating the extent and severity of high landslide hazards.The features of the slope shape,the physico-mechanical properties of the slope,both of these factors are the influencing factors of these indexes.The author through the collection and analysis of data of 17 typical high landslides, the data shows that high landslides generally have a gentle slope shape (polygonal slope).This article will reflect the steep slopes of the slope features of the high landslide shear outlets, the gradient of the gentle slopes, and the cohesion and internal friction angle that reflect the nature of the slope surface as movement parameters’ influencing factors.Based on the data and combined with experience, the range of variation of each influencing factor was determined. The UDEC numerical simulation experiment was designed according to the orthogonal design, The influence of various factors on the distance and speed of the high landslide was studied using range and variance analysis.The results show that: the extreme results show that the order of the primary and secondary impact movement distance is gentle mild slope>steep slope>>cohesion=internal friction angle, the order of primary and secondary affecting the movement speed is steep slope>>mild slope>cohesion>internal friction angle;the results of variance show that mild slope and steep slope are highly significant factors affecting the movement distance, steep slope is a significant factor affecting the speed, and the rest are insignificant factors.Landslide movement parameters are significantly affected by the terrain conditions of the site. Therefore, when assessing the scope and intensity of high landslide hazards, the slope shape below the shear outlet should be mainly considered.

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引用本文

廖军,董谦,钱小龙. 基于UDEC的高位滑坡运动参数影响因素研究[J]. 科学技术与工程, 2018, 18(34): .
Liao Jun,,Qian Xiaolong. Research on Influencing Factors of Movement Parameters of High Landslide Based on UDEC[J]. Science Technology and Engineering,2018,18(34).

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  • 收稿日期:2018-07-05
  • 最后修改日期:2018-09-10
  • 录用日期:2018-09-14
  • 在线发布日期: 2018-12-20
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