Abstract:

Engineering treatment effect of large-scale wading landslides in the Three Gorges Reservoir area has become a key issue that whether the reservoir can be in long-term normal operation. Taking the 15 large-scale wading landslides that have been treated in Badong County as the research object, this study summarized the large-scale wading landslides prevention and control engineering measures and analyzed the technical characteristics of large-scale wading landslide disaster prevention projects, and revealed that the anti-slide pile, slope protection engineering and drainage engineering have the highest utilization rate of engineering measures,and then pointed out the macro-deformation problems of engineering treatment based on the actual investigation.Combined with quantitative and qualitative evaluation method, this paper proposes an assessment approach with multi-levels and multi-factors. The index system was established according to the engineering treatment processes, survey results and the important factors that might change in the late operation. And based on the comprehensive evaluation value an evaluation standard was set up.The application case of XL01 landslide shows that this approach is practical and effective.Finally, this paper classified the large-scale wading landslides engineering treatment effect of Badong County according to the evaluation system. It comes to the conclusion that the engineering treatment has a good effect,but  there still have some problems.

Key words: the Three Gorges Reservoir area, large-scale wading landslide, engineering treatment effect, evaluation index system