土工基础

土工基础 ›› 2022, Vol. 36 ›› Issue (3): 414-416.

• 专题论述 • 上一篇    下一篇

不同库水位升速条件下三峡库区浮托减重型滑坡稳定性研究

邓永煌1，柳 青1，黄晓虎2   

  1. （1.宜昌市地质环境监测站，湖北宜昌 443000；2.三峡大学 湖北省防灾减灾重点实验室，湖北宜昌 443000）
  • 收稿日期:2021-09-16 修回日期:2021-09-23 出版日期:2022-06-30 发布日期:2022-06-24
  • 通讯作者: 黄晓虎（1987-），男，讲师，博士研究生，研究方向为地质灾害预测与防治。
  • 作者简介:邓永煌（1988-），男，工程师，硕士研究生，研究方向为地质灾害防治。
  • 基金资助:
    国家自然科学基金青年基金项目（42007237）

Stability of Landslide Due to Effective Weight Loss in Three GorgesReservoir Under the Rapid Pool Level Rise

DENG Yonghuang1, LIU Qing1, HUANG Xiaohu2   

  1. (1.Yichang Geological Environment Monitoring Station, Yichang 443000;
    2.Key Laboratory of Disaster Prevention and Mitigation of Hubei Province, Three Gorges University, Yichang 443000)
  • Received:2021-09-16 Revised:2021-09-23 Online:2022-06-30 Published:2022-06-24

摘要： 三峡水库蓄水以来，库区发生过多起滑坡等地质灾害。选取三峡库区孙家庄滑坡作为研究对象，通过分析GPS监测数据与库水位之间的关系，判定孙家庄滑坡属于浮托减重型滑坡。结合Geo-Studio软件中的SEEP/W和SLOPE/W模块，分析不同库水位上升速率的地下水位变化情况，并深入研究其稳定系数变化规律。结果表明：库水上升过程中，滑坡体前缘阻滑段陆续被淹没，抗滑力减小，稳定性系数不断减小；库水上升速率越小，相对应稳定性系数越小。该研究对浮托减重型滑坡变形机理及稳定性分析具有较大的参考意义。


关键词: 浮托减重型滑坡, 库水位升速, 渗流场, 稳定性

Abstract: Since the impoundment of the Three Gorges Reservoir, many landslides and other geological hazards have occurred in the reservoir area. Based on the analysis of the relationship between the GPS monitoring data and the reservoir pool water level, the Sunjiazhuang landslide in the three Gorges Reservoir area was selected to evaluate the stability. It is concluded that the sliding belonged to the buoyancy weight loss landslide type. The SEEP/W and SLOPE/W modules in geo-studio software were used and the seepage field under different pool water level rising rate conditions was evaluated. The variation of the stability coefficients was analyzed in detail. The results show that in the process of reservoir water rising, the sliding resistance section at the leading edge of the landslide body is continuously submerged, the anti-sliding force decreases, and the stability coefficient decreases. The smaller the rising rate of reservoir pool water, the smaller the stability coefficient.

Key words: buoyancy weight loss landslide, rate of rise of reservoir water pool level, seepage field, slope stability

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