...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Bulletin of engineering geology and the environment >Research on the creep mechanism of Huangniba landslide in the Three Gorges Reservoir Area of China considering the seepage-stress coupling effect
【24h】

Research on the creep mechanism of Huangniba landslide in the Three Gorges Reservoir Area of China considering the seepage-stress coupling effect

机译：考虑渗流-应力耦合效应的中国三峡库区黄泥坝滑坡蠕变机理研究

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

The impoundment of China's Three Gorges Reservoir has led to the revival of many old landslides along the bank, and the annual fluctuation in water level of 30 m is likely to affect the creep deformation of these landslides. Through a field investigation of Huangniba landslide in the Three Gorges Reservoir Area, the local deformation signs and field monitoring data were analyzed. It was preliminarily considered that this landslide was currently at the creep stage and the creep rate was affected by the reservoir level variation. In order to carry out further research on the effect of reservoir level variation on the landslide movement, the finite element method was used to establish the seepage-stress coupling model of Huangniba landslide based on the seepage-stress coupling theory and taking into account the creep behavior of landslide material. The model was used to simulate the variation characteristics of the seepage field, stress field, and displacement field in the landslide during 6 years of cycles of reservoir level variation. Based on the numerical simulation results and field monitoring data, the deformation mechanism of the landslide was discussed. Finally, the sensitivity of the parameters in the creep model to the simulation results was discussed. The results show that creep deformation is the main deformation mechanism of Huangniba landslide, and it is obviously affected by the drawdown of the reservoir water level. During drawdown of the reservoir level, the pore water pressure inside the landslide decreases, resulting in an increase in effective creep stress and creep strain rate, thus accelerating creep deformation. The results of this study will provide a reference for the deformation mechanism of such creeping landslides subjecting to reservoir water level fluctuation.
机译：中国三峡水库的蓄水导致沿岸许多旧滑坡的复兴，每年30 m的水位波动很可能会影响这些滑坡的蠕变变形。通过对三峡库区黄泥坝滑坡的野外调查，分析了当地的变形标志和野外监测数据。初步认为该滑坡目前处于蠕变阶段，蠕变速率受储层高度变化的影响。为了进一步研究储层水位变化对滑坡运动的影响，基于渗流-应力耦合理论并考虑蠕变，采用有限元方法建立了黄泥坝滑坡的渗流-应力耦合模型。滑坡物质的行为。该模型用于模拟水库液位变化6年周期中滑坡的渗流场，应力场和位移场的变化特征。根据数值模拟结果和现场监测数据，探讨了滑坡的变形机理。最后，讨论了蠕变模型中参数对仿真结果的敏感性。结果表明，蠕变变形是黄泥坝滑坡的主要变形机制，明显受储层水位下降的影响。在储层水位下降期间，滑坡内部的孔隙水压力降低，导致有效蠕变应力和蠕变应变率增加，从而加速了蠕变变形。研究结果将为这种蠕变滑坡在水库水位波动下的变形机理提供参考。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号