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| Citation: | CAO Wen, LI Weichao, TANG Bin, DENG Gang, LI Junfeng. 2017: PFC STUDY ON BUILDING OF 2D AND 3D LANDSLIDE MODELS. JOURNAL OF ENGINEERING GEOLOGY, 25(2): 455-462. doi: 10.13544/j.cnki.jeg.2017.02.024
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PFC STUDY ON BUILDING OF 2D AND 3D LANDSLIDE MODELS
doi: 10.13544/j.cnki.jeg.2017.02.024
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Abstract
Simulations of landslide run-out can avoid the limit of experiment and instrumentation. It can observe the movement processes in detail. It is essential to the quantitative hazard assessment for landslide. for the simulation of landslide movement, the primary work is to establish a landslide model. Although the Particle Flow Code (PFC) is one of the most widely used program for landslide modeling, it is weak in the pre-processing of building the landslide model. This limits its application to landslide modeling. As for this, this paper illustrates the applicability, advantages and disadvantages of the Ball-Ball and Ball-Wall methods for model building. The way to determine the boundary of sliding mass and sliding bed is presented. It is based on the digital elevation map and the Brick filling method. It takes the earthquake-induced Red Rock Landslide as an example. Four steps are presented to build 2D & 3D landslide model with PFC.The four steps are obtaining topographic data, determining the boundary of both sliding mass and sliding bed, building the geometry of both sliding mass and sliding bed, filling the geometry with particles. By this way, the 2D and 3D landslide model can be easily and quickly built with PFC.The presented method will be helpful to the simulation of landslide movement with PFC. -
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References
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- Figure 1. Modeling flow diagram of PFC2D and PFC3D
- Figure 2. Diagram before and after the sliding of Red Rock (from Google Earth)
- Figure 3. Superposition of contour map before and after the sliding of the landslide (Scale: 1 : 2000, Counter interval: 10m)
- Figure 4. The A-A′ profiles before and after the landslide
- Figure 5. Processing result of the profile
- Figure 6. The Ball-Ball model and Ball-Wall model
- Figure 7. The 3D surface model of the top boundary of sliding mass and the sliding bed boundary
- Figure 8. Sliding mass and sliding bed geometry imported into PFC3D
- Figure 9. Landslide model of PFC3D
- Figure 10. Simulation result by PFC3D