首页|地层倾角及侧向摩擦对滑坡影响的物理模拟研究

地层倾角及侧向摩擦对滑坡影响的物理模拟研究

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  • 国家科技期刊平台
  • NETL
  • NSTL
  • 万方数据
  • 维普
滑坡是黔北地区常见的地质灾害,政府每年都投入大量的资金开展相关的治理和研究,但是针对滑坡变形及其演化影响的模拟分析,目前所开展的工作仍然十分不足.为此,结合黔北地区典型滑坡野外的勘察和调查,设计了不同地层倾角和摩擦条件的6 组物理模型对滑坡变形进行了研究,并应用PIV技术对滑坡变形演化过程中的应变速率场进行了分析探讨.研究表明:① 地层倾角对滑坡具有强烈的控制作用.低地层倾角条件下,坡体的变形演化存在穿时现象;而高地层倾角条件下,坡体主要是从后缘到中部,再到前缘的逐步扩展变形.② 侧向摩擦强度影响坡体的几何形态,具有较高侧向摩擦力的滑坡,形成的坡体几何形态呈条带状分布特征;相反,具有低摩擦力的滑坡,则形成近似椭圆形状的坡体.该物理模拟结果可为黔北地区滑坡演化过程的理解提供构造物理学证据.
Physical simulation study on influence of stratigraphic dip and lateral friction on landslides
Landslides are a common geological hazard in northern Guizhou Province,and the government invests a lot every year to carry out related governance and research.However,the simulation analysis of landslide deformation and its evolutionary impact is still very insufficient.For this purpose,based on the field survey and investigation of typical landslides in the Northern Guizhou Province,six groups of sand-box models with different stratigraphic dip and lateral friction conditions were designed to study landslide deformation.PIV technology was applied to analyze and explore the strain rate field during the evolution process of land-slide deformation of the analogue modelling test.The results showed that:① The stratigraphic dip has a strong effect on land-slides.Under the condition of the low-dip angle,the deformation evolution of the landslide exhibits a diachronism phenomenon.Under the condition of the high-dip angle,the landslide mainly undergoes gradual propagation and deformation from the rear zone to the middle zone,and then to the front zone.②The strength of lateral friction affects the geometric shape of the landslide.Land-slides with high lateral friction form a strip-shape accumulated body.On the contrary,landslides with low-friction form an ap-proximate elliptical shape.Analogue modelling results of this study can provide structural physics references for understanding the evolution process of landslides in northern Guizhou Province.

landslide deformationevolution processstratigraphic diplateral friction actionphysical simulationnorthern Guizhou Province

何文刚、赵远雯、何鸣、袁达雄

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遵义师范学院 工学院,贵州 遵义 563006

滑坡变形 演化过程 地层倾角 侧向摩擦作用 物理模拟 黔北地区

贵州省科技厅项目遵义师范学院大创项目国家留学基金委项目

黔科合基础-ZK[2022]一般571S202210664096CSC201908520019

2024

10.16232/j.cnki.1001-4179.2024.01.019

人民长江
水利部长江水利委员会

人民长江

CSTPCD北大核心
影响因子：0.451
ISSN：1001-4179
年,卷(期)：2024.55(1)
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