Numerical analysis of slope stability influenced by varying water conditions in the reservoir area of the Three Gorges, China

Shaojun Li, Xiating Feng, J. A. Knappett

    Research output: Chapter in Book/Report/Conference proceedingConference contribution

    Abstract

    Landslide disasters have become one of the main problems after the Three Gorges impounded. Scholars from all over the world have paid much more attention to the stability of slopes in the reservoir area. Water has been regarded as the main factor which may directly trigger landslides, while the change of water conditions can't be avoided in the slopes in the Three Gorges. The water conditions mentioned in this paper refer to reservoir water level and water table in slope body. They will inevitably deteriorate the slope stability in some degree. The paper aims to investigate their influence on slope stability. A promising numerical analysis technique by shear strength reduction based on finite differential method is introduced here to deal with such a problem. According to the results from a real landslide in the Three Gorges, the curve between the factor of safety and the change of water level is parabolic: the slope stability will be reduced at the first stage of raising reservoir water level and then the factor of safety will be increased after that. However, the landslide will always greatly suffer from the instability when the reservoir water level drops down and the water table rises. It will provide a direct proof for the landslide prevention and remedial designs in this case.

    Original languageEnglish
    Title of host publicationLandslides and engineered slopes : from the past to the future
    Subtitle of host publicationproceedings of the 10th International Symposium on Landslides and Engineered Slopes, 30 June-4 July, 2008, Xi'an, China
    EditorsZuyu Chen, Jian-Min Zhang, Zhong-Kui Li, Fa-Quan Wu, Ken Ho
    Place of PublicationLeiden
    PublisherCRC Press
    Pages803-807
    Number of pages5
    Volume1
    ISBN (Electronic)9780203885284
    ISBN (Print)9780415411943 (v.1), 9780415411967 (2v.set)
    DOIs
    Publication statusPublished - 2008
    Event10th International Symposium on Landslides and Engineered Slopes - Xian, China
    Duration: 30 Jun 20084 Jul 2008
    http://www.preventionweb.net/english/professional/trainings-events/events/v.php?id=7436

    Conference

    Conference10th International Symposium on Landslides and Engineered Slopes
    CountryChina
    CityXian
    Period30/06/084/07/08
    Internet address

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