Wang Shimei, Pan Yuchen, Wang Li, et al. 2021. Response analysis of landslide deformation to front bank collapse of Daping landslide in Three GorgesReservoir area[J]. Journal of Engineering Geology, 29(3): 647-656. doi: 10.13544/j.cnki.jeg.2021-0194.
    Citation: Wang Shimei, Pan Yuchen, Wang Li, et al. 2021. Response analysis of landslide deformation to front bank collapse of Daping landslide in Three GorgesReservoir area[J]. Journal of Engineering Geology, 29(3): 647-656. doi: 10.13544/j.cnki.jeg.2021-0194.

    RESPONSE ANALYSIS OF LANDSLIDE DEFORMATION TO FRONT BANK COLLAPSE OF DAPING LANDSLIDE IN THREE GORGES RESERVOIR AREA

    • With the long-term operation of the Three Gorges Reservoir, owing to the fluctuation of water level and wave action, the bank collapse in the Three Gorges Reservoir area becomes more and more evident. Bank collapse not only causes soil loss, but also induces the landslide occurrence. Daping landslide is one of the landslides in Three Gorges Reservoir area. Its bank collapse development is serious. This paper combines the surface deformation with GPS displacement data of Daping landslide. It analyzes the characteristics of landslide deformation and the impact of bank collapse on landslide deformation. On this basis, it uses the model change method to realize the numerical simulation of the influence of the front bank collapse on the stability of the landslide, and further explores the response relationship of the landslide deformation to the front bank collapse. The results show the follows. The deformation of Daping landslide is mainly affected by the fluctuation of the reservoir water level. The bank collapse of the front edge is relatively developed. The surface displacement of GPS monitoring point on the side of the bank collapse has evident changes. Evidently, the bank collapse has a greater impact on the surface deformation of Daping landslide. The ABAQUS finite element calculation results show that the bank collapse has a significant impact on the landslide deformation, and the impact magnitude is mainly related to the amount of bank collapse. The landslide deformation caused by bank collapse is mainly concentrated in the front part of the landslide and gradually expands to the rear part. The model change method in ABAQUS can well simulate the influence of bank collapse on the landslide stability.
    • loading

    Catalog

      /

      DownLoad:  Full-Size Img  PowerPoint
      Return
      Return