三峡大学湖北省地质灾害防治工程技术研究中心
纸质出版:2026
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刘开心, 邓茂林, 费霈妍, 等. 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]. 地质科技通报, 2026,45(2):206-217.
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.
刘开心, 邓茂林, 费霈妍, 等. 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]. 地质科技通报, 2026,45(2):206-217. DOI: 10.19509/j.cnki.dzkq.tb20240697.
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.
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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