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Application of GIS Technique in Three-Dimensional Slope Stability Analysis

In: Computational Mechanics

Author

Listed:
  • Cheng Qiu

    (Kyushu University, Department of Civil and Structural Engineering)

  • Mowen Xie

    (University of Science and Technology Beijing, Civil and Environmental Engineering School)

  • Tetsuro Esaki

    (Kyushu University, Department of Civil and Structural Engineering)

Abstract

Currently, even though some computer programs are commercially available for three-dimensional (3D) slope stability analysis, practical application of the 3D method in engineering issues is still lacking. A suitable method that using a common data form for 3D analysis is urgently required. A Geographical Information System (GIS), as a computer-based system, allows easy data updating, modeling, nice result presentations, and complex spatial analysis. It is ideal and anticipant to embed the 3D models within GIS environment. In this paper, a new GIS raster-based 3D deterministic model is proposed to accomplish the combination of the column-based 3D method and the GIS raster data. Multiple column-based 3D methods can be adopted in this model by extracting all slope-related information from study area to create a set of corresponding raster data layers. The raster data can be efficiently analyzed within a column-based 3D model to calculate the 3D safety factor. A GIS-based system is developed to implement all processes. A comparison with other existing programs using two widely used examples validates the correction of the proposed algorithm while the effect of the number of columns using in discretization of the slope on resultant safety factors is also discussed. This approach is shown to have the ability to simplify the data-input procedure and the column discretization, and to expedite the safety factor computations. The use of GIS data form and GIS functions provides the convenience in renewal of the data and in multiple cases study. Safety factors obtained by this model showed a little overestimation compared with other published 3D methods due to the use of more columns. The number of the columns using in discretization of the slope was found out to be 20000 for making the resultant safety factor fixed.

Suggested Citation

  • Cheng Qiu & Mowen Xie & Tetsuro Esaki, 2007. "Application of GIS Technique in Three-Dimensional Slope Stability Analysis," Springer Books, in: Computational Mechanics, pages 316-316, Springer.
    • Handle: RePEc:spr:sprchp:978-3-540-75999-7_116
    DOI: 10.1007/978-3-540-75999-7_116
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