Journal of Jilin University(Earth Science Edition) ›› 2021, Vol. 51 ›› Issue (5): 1347-1355.doi: 10.13278/j.cnki.jjuese.20200292

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Optimization and Application of FLAC3D Strength-Reduction Computation in Three-Dimension Slope Stability Analysis

Xu Wengang1, Yu Xurong1, Nian Tingkai2, Cao Qi1, Cao Aiwu3, Pei Zhenwei2   

  1. 1. Transportation and Municipal Engineering Institute, Power China Huadong Engineering Corporation Limited, Hangzhou 311122, China;
    2. School of Civil Engineering, Dalian University of Technology, Dalian 116024, Liaoning, China;
    3. HydroChina ITASCA R&D Center, Hangzhou 311122, China
  • Received:2020-12-07 Online:2021-09-26 Published:2021-09-29
  • Supported by:
    Supported by the National Natural Science Foundation of China (U1765107)

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Abstract: The strength-reduction method (SRM) is widely applied in slope engineering projects, and FLAC3D has become the main tool for 3D slope stability analysis. Although FLAC3D has SRM intrinsic modular to complete this task, the computing process is complicated and time-consuming, hence the bisectional method is then involved to simplify the process by some researchers, which, however,is defactive in some aspects. An optimized bisectional method is supplied in this paper based on Python, including in-situ stress field reloading and selection of the upper limit of time-steps, which obviously improves computing efficiency. By using this optimized method, a fill slope in road engineering project was analyzed, showing that the strength reduced factor is consistent with those of the other methods and with much higher computing efficiency (ca. 50% and 300% higher than the other improved methods and the intrinsic modular, respectively).

Key words: three-dimension slope, strength-reduction method, FLAC3D, road slope, Python

CLC Number: 

  • U417.2
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