JOURNAL OF YANGTZE RIVER SCIENTIFIC RESEARCH INSTI ›› 2017, Vol. 34 ›› Issue (8): 72-78.DOI: 10.11988/ckyyb.20160447

• ROCK-SOIL ENGINEERING • Previous Articles     Next Articles

Moisture-heat Coupling Behavior and Stability of Interbedded Slope in Extreme Climates

MA Shao-kun1, 2, 3, TONG Wei-feng1, FENG Ye1, LIU Ying1, 2, JIANG Jie1, 2, 3   

  1. 1.College of Civil Engineering and Architecture, Guangxi University, Nanning 530004, China;
    2.Key Laboratory of Disaster Prevention and Structural Safety, Guangxi University, Nanning 530004, China;
    3.Guangxi Key Laboratory of Geomechanics and Geotechnical Engineering, Guilin University of Technology,Guilin 541004, China
  • Received:2016-05-07 Revised:2016-06-28 Online:2017-08-01 Published:2017-08-18
  • Supported by:
    国家自然科学基金项目(51678166,41362016); 广西岩土力学与工程重点实验室开放基金项目(16-KF-01)

Abstract: The temperature field and moisture field of typical siltstone and mudstone interbedded slope in Nanning under extreme climates are analyzed by means of numerical simulation based on soil moisture-heat coupling theory. The moisture-heat coupling behavior, the temperature-moisture filed variations and the impact on slope stability under different combinations of extreme climates are obtained. Results show that dramatic climate change in short time has large impact on the temperature and moisture fields of surface soil; while long-term climate such as arid has great effect on the temperature and moisture fields of deep soil. Rainfall has small influence on temperature field; and during the evaporation after rainfall, the moisture content at a certain depth in the lower part of middle slope increases to some extent, which would disappear in long-term drought. Moreover, the slope's factor of safety increases apparently under the action of evaporation. In particular, in short-term evaporation with high temperature, interbedded slope is more stable than homogeneous slope; while in long term evaporation, homogeneous slope is more stable.

Key words: interbedded slope, extreme climate, moisture-heat coupling, slope stability analysis, volumetric water content

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