Rock and Soil Mechanics ›› 2019, Vol. 40 ›› Issue (7): 2781-2788.doi: 10.16285/j.rsm.2018.1741

• Geotechnical Engineering • Previous Articles     Next Articles

A method for calculating the three-dimensional landslide speed of reservoir bank based on GIS

YU Guo1, XIE Mo-wen1, HU Qing-zhong2, JIN Yu-peng2   

  1. 1. School of Civil and Resources Engineering, University of Science & Technology Beijing, Beijing 100083, China; 2. Guodian Dadu River Houziyan Hydropower Construction Co., Ltd., Kangding, Kangding, Sichuan 626000, China
  • Received:2018-09-19 Online:2019-07-11 Published:2019-07-28
  • Supported by:
    This work was supported by the National Natural Science Foundation of China (41372370)

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Abstract: Combined with the spatial data processing capabilities of GIS, a calculation method for reservoir bank landslide speed based on grid column elements was proposed. The Pan Jiazheng method was extended from two-dimensional to three-dimensional. A three-dimensional (3D) landslide speed calculation model based on grid column elements was first established, and the spatial computational expression of each parameter in GIS was clearly specified. Secondly, based on the Newton's law of motion, the dynamic equilibrium equations were established along and perpendicular to the sliding direction to derive the three-dimensional landslide speed. Finally, an expanded module of 3D landslide speed calculation was embedded in GIS platform, and the result of a case study was compared with that obtained from the Pan Jiazheng method. The results showed that compared to results from the Pan Jiazheng method, the maximum speed calculated by the method in this paper is 15.2 % higher and the acceleration is 32.8 % higher, and 1 s shorter for reaching the maximum speed.

Key words: landslide speed, grid column elements, GIS, Pan Jiazheng method

CLC Number: 

  • TU 457
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