土工基础

土工基础 ›› 2024, Vol. 38 ›› Issue (2): 229-233.

• 工程实录 • 上一篇    下一篇

墓坪滑坡变形特征与降雨库水耦合作用变形机制

雷 玉1,2，张家旭1,2，高晨曦3   

  1. (1.三峡大学 防灾减灾湖北省重点实验室，湖北宜昌 443002；2.三峡大学三峡库区地质灾害教育部重点实验室，湖北宜昌 443002；3.湖北省地质局水文地质工程地质大队，湖北荆州 434020)
  • 收稿日期:2023-09-23 修回日期:2023-10-08 出版日期:2024-02-29 发布日期:2024-12-22
  • 作者简介:雷玉(1999-)，女，硕士研究生，研究方向为滑坡灾害防治。
  • 基金资助:
    国家自然科学基金资助项目(42074005)

Deformation Characteristics of the Muping Landslide and Deformation Mechanism of Rainfall Coupled with Reservoir Pool Water

LEI Yu1,2, ZHANG Jiaxu1,2， GAO Chenxi3    

  1. (1.Hubei Key Laboratory of Disaster Prevention and Mitigation, Three Gorges University, Yichang 443002；
    2.Key Laboratory of Geological Hazards on Three Gorges Reservoir Area of Ministry of Education, Three Gorges University, Yichang 443002；
    3.Hydrogeology and Engineering Geology Institute of Hubei Geological Bureau， Jingzhou 434020)
  • Received:2023-09-23 Revised:2023-10-08 Online:2024-02-29 Published:2024-12-22

摘要： 三峡库区滑坡众多，自水库蓄水以来，库水周期性变化且降雨充沛，对库区滑坡稳定性产生影响。以三峡库区墓坪滑坡为例，通过野外地质调查、位移监测等数据资料，采用定性与定量相结合的方法，分析了降雨与库水耦合作用下滑坡的变形机制。结果表明，墓坪滑坡的“阶跃”现象呈现出一大多小特征，大的“阶跃”现象伴随着库水位大幅波动和明显降雨；当库水位下降时，滑坡变形响应更为敏感，这是由于地下水与库水位的水头差指向滑坡外所致；单日强降雨和连续降雨均可引起滑坡变形，高水位运行阶段峰值速率滞后时间为9 d。研究成果可为墓坪滑坡灾害防治及同类滑坡的研究提供依据。


关键词: 三峡库区, 土质滑坡, 库水, 降雨

Abstract: Many landslides have occurred in Three Gorges Reservoir area. Since the impoundment of the reservoir, the reservoir pool water level changes periodically and the rainfall is abundant, which has an impact on the stability of slopes in the reservoir area. The Muping landslide in the Three Gorges Reservoir area was presented as a case history in this paper. The deformation mechanism of the landslide under the coupled effect of the rainfall and the reservoir pool water level is analyzed by using the combination of qualitative and quantitative methods throughout the field geological survey, the displacement monitoring and other data. The results show that the “stepped” phenomenon of the Muping landslide presents a small characteristic, and the large “stepped” phenomenon is accompanied by the large fluctuation of the reservoir pool water level and the obvious rainfall; When the reservoir pool water level drops, the landslide deformation response is more sensitive, because the head difference between the groundwater and the reservoir pool water level points out of the landslide. Single day heavy rainfall and the continuous rainfall can cause the landslide deformation, and the lag time of the peak rate in high pool water level operation stage is 9 days. The research results can provide a basis for the prevention and the control of Muping the landslide hazard and the study of similar landslides.

Key words: Three Gorges Reservoir Area, Landslide in Soils, Reservoir Pool Water, Rainfall

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