三峡库区动水压力型滑坡对降雨的响应规律：以八字门滑坡为例

刘开心; 邓茂林; 费霈妍; 易庆林; 汪标

doi:10.19509/j.cnki.dzkq.tb20240697

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三峡库区动水压力型滑坡对降雨的响应规律：以八字门滑坡为例

更新时间：2026-11-05

- 三峡库区动水压力型滑坡对降雨的响应规律：以八字门滑坡为例
- Bulletin of Geological Science and Technology Vol. 45, Issue 2, Pages: 206-217(2026)
- 作者机构：
  
  三峡大学湖北省地质灾害防治工程技术研究中心
- 作者简介：
- 基金信息：
- DOI：10.19509/j.cnki.dzkq.tb20240697
  CLC： P642.22;TV697.23
- Published：2026
- 稿件说明：
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刘开心, 邓茂林, 费霈妍, et al. 三峡库区动水压力型滑坡对降雨的响应规律：以八字门滑坡为例[J]. Bulletin of Geological Science and Technology, 2026, 45(2): 206-217.
DOI：

刘开心, 邓茂林, 费霈妍, et al. 三峡库区动水压力型滑坡对降雨的响应规律：以八字门滑坡为例[J]. Bulletin of Geological Science and Technology, 2026, 45(2): 206-217. DOI： 10.19509/j.cnki.dzkq.tb20240697.

摘要

为探究动水压力型滑坡对降雨的响应规律，以三峡库区八字门滑坡为例，结合地质勘察数据、相关性分析及有限元数值模拟，系统研究了降雨对滑坡变形的影响，揭示其对降雨的响应规律及变形机制。研究表明，库水位涨落和降雨是八字门滑坡变形的主要驱动因素。降雨对滑坡变形的影响表现为：在库水位下降阶段，降雨通过补给坡体内部水头，进一步增强动水压力作用，显著加剧坡体变形；而在库水位上升阶段，降雨入渗至次级滑带后缘，导致孔隙水压力升高，从而引发滑坡后缘变形并推动滑坡整体变形，足够的降雨是库水位上升期间滑坡变形的主要触发因素。滑坡变形呈现一定的滞后性，其中库水位下降引发的变形滞后时间约为20 d，降雨引发的变形滞后时间为9 d。长时间持续降雨条件下的滑坡稳定系数（1.029）衰减程度高于暴雨条件下的稳定系数（1.039）。研究成果深化了对动水压力型滑坡变形机制的认识，可为该类滑坡的预警预测提供参考。

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