三峡库区周家沟滑坡基本特征与变形机理

朱晓涵; 周梦婷; 邓茂林; 彭旭; 苏鹏民; 梁之康; 李雨洲; 童率

doi:10.13928/j.cnki.wrahe.2026.02.018

水利水电技术（中英文） ›› 2026, Vol. 57 ›› Issue (2) : 241 -254. DOI: 10.13928/j.cnki.wrahe.2026.02.018

工程地质

三峡库区周家沟滑坡基本特征与变形机理

朱晓涵 ¹^,² ,
周梦婷 ¹^,² ,
邓茂林 ¹^,² ,
彭旭 ¹^,² ,
苏鹏民 ¹^,² ,
梁之康 ¹^,² ,
李雨洲 ¹^,² ,
童率 ¹^,²

作者信息 +

Basic characteristics and deformation mechanism of Zhoujiagou landslide in Three Gorges Reservoir area

Xiaohan ZHU ¹^,² ,
Mengting ZHOU ¹^,² ,
Maolin DENG ¹^,² ,
Xu PENG ¹^,² ,
Pengmin SU ¹^,² ,
Zhikang LIANG ¹^,² ,
Yuzhou LI ¹^,² ,
Shuai TONG ¹^,²

Author information +

文章历史 +

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摘要

【目的】受库水位变化和降雨影响，三峡库区许多涉水土质滑坡的累积位移监测曲线呈现出周期性的变形突变。为避免因变形突变导致滑坡变形阶段的误判及预警失误，需进一步提升三峡库区滑坡灾害的预警精度与防治效果。【方法】以童庄河流域的周家沟滑坡为研究对象，结合库水及降雨，通过监测数据和野外调查，采用有限元软件Geo-Studio进行实际工况下的渗流场、位移场与稳定性计算，研究滑坡的变形特征及失稳机理。【结果】2022年4月至2024年4月，周家沟滑坡累积位移监测曲线出现四次变形突变，与集中强降雨(日降雨量均超过35.6 mm)密切相关，并伴有明显滞后效应。当库水位超过160 m时，指向坡内的动水压力有利于坡体稳定，使降雨阈值提高至40 mm。【结论】研究表明周家沟滑坡稳定性受库水位升降与降雨入渗的影响，降雨为周家沟滑坡变形主要的诱发因素，研究成果为三峡库区类似滑坡的监测预警与防治提供了科学支撑。

Abstract

[Objective] The impact of reservoir water level fluctuations and rainfall on the cumulative displacement monitoring curves of water-related soil landslides in the Three Gorges Reservoir area is investigated, with a focus on periodic abrupt changes. Enhanced accuracy in landslide disaster warnings and improved effectiveness of prevention and control measures are deemed essential to prevent misjudgments in deformation stages and to address early warning failures caused by abrupt deformations. [Methods] The Zhoujiagou landslide, located in the Tongzhuang River Basin, is examined through the integration of reservoir water level and rainfall data, supported by monitoring records and field investigations. The finite element software Geo-Studio is utilized to compute seepage fields, displacement fields, and stability under actual conditions, with the objective of analyzing deformation characteristics and instability mechanisms. [Results] From April 2022 to April 2024, four abrupt deformation events were observed in the cumulative displacement monitoring curve of the Zhoujiagou landslide, closely correlated with heavy rainfall(daily rainfall exceeding 35.6 mm) and accompanied by a distinct lag effect. At reservoir water levels above 160 meters, inward-directed dynamic water pressure was found to enhance slope stability, raising the rainfall threshold to 40 mm. [Conclusion] The stability of the Zhoujiagou landslide is significantly affected by reservoir water level fluctuations and rainfall infiltration, with rainfall identified as the primary trigger for deformation. These insights provide valuable scientific guidance for the monitoring, early warning, and prevention of similar landslides in the Three Gorges Reservoir area.

关键词

变形机理 / 稳定性分析 / 数值模拟 / 降雨 / 库水位 / 滑坡 / 变形 / 三峡水库

Key words

deformation mechanism / stability analysis / numerical simulation / rainfall / reservoir water level / landslide / deformation / Three Gorges Reservoir