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| 不同水位调度情况下滑坡的变形分析 |
| Deformation Analysis of Landslide Under Different Water Level Dispatching Conditions |
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| DOI：10.16018/j.cnki.cn32-1650/n.202304001 |
| 中文关键词: 滑坡 三峡库区 涉水边坡 FLCA 3D |
| 英文关键词: landslide three gorges reservoir area wading slope FLCA 3D |
| 基金项目: |
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| 摘要点击次数: 41 |
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| 中文摘要: |
| 为研究三峡库区水位反复升降情况下对沿岸涉水边坡的影响，以卡子湾滑坡为例，通过FLCA 3D软件模拟不同工况下水位调度对滑坡变形的影响。结果表明: 在库水反复升降过程中，前缘涉水段位移变化较大，最大位移发生在库水处于低水位期；剪应力在静水位阶段变化较小，在水位变化时剪应力随着库水下降而增大，随着库水上升而减小；随着库水位周期性变动，滑坡前部张拉作用由滑坡前缘局部向整个前缘部分扩展；滑坡在库水快速下降阶段，日位移变化量达到最大，但仍未形成连续、贯通的剪应变增量带，说明滑坡在当前调度过程中仍处于相对稳定状态；在对中前部监测点分析发现，滑坡中前部地表位移主要发生在库水位调度下降期，所以在降水期应对沿岸滑坡重点监测。 |
| 英文摘要: |
| In order to study the influence of repeated fluctuation of water level in Three Gorges reservoir area on coastal wading slopes, taking Kaziwan landslide as an example, the influence of water level regulation on landslide deformation under different working conditions was simulated by FLCA 3D software. The results show that the displacement of the front wading section changes greatly during the repeated fluctuation of the reservoir water, and the maximum displacement occurs when the reservoir water is at a low water level. The shear stress changes little in the static water level stage, and increases with the decrease of reservoir water and decreases with the increase of reservoir water when the water level changes. With the periodic change of reservoir water level, the front tension of landslide extends from the local front of landslide to the whole front. During the rapid decline of reservoir water, the daily displacement of the landslide reaches the maximum, but it has not yet formed a continuous and penetrating shear strain increment zone, indicating that the landslide is still in a relatively stable state in the current dispatching process. Based on the analysis of the monitoring points in the middle and front part, it is found that the surface displacement in the middle and front part of the landslide mainly occurs in the period of reservoir water level dispatching decline, so the coastal landslide should be monitored mainly in the precipitation period. |
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