Volume 36 Issue 5
Oct.  2022
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Article Navigation >  GEOTECHNICAL ENGINEERING TECHNIQUE  > 2022  >  36(5): 377-381
Man Jun, Ren Zhishan, Sun Guangji, Deng Xiaolong. Stability Evaluation Based on Geotechnical Back-analysis Method for Abandoned Slag Field of a Highway Tunnel in Tibet[J]. GEOTECHNICAL ENGINEERING TECHNIQUE, 2022, 36(5): 377-381. doi: 10.3969/j.issn.1007-2993.2022.05.006
Citation: Man Jun, Ren Zhishan, Sun Guangji, Deng Xiaolong. Stability Evaluation Based on Geotechnical Back-analysis Method for Abandoned Slag Field of a Highway Tunnel in Tibet[J]. GEOTECHNICAL ENGINEERING TECHNIQUE, 2022, 36(5): 377-381. doi: 10.3969/j.issn.1007-2993.2022.05.006
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Stability Evaluation Based on Geotechnical Back-analysis Method for Abandoned Slag Field of a Highway Tunnel in Tibet

doi: 10.3969/j.issn.1007-2993.2022.05.006
  • 1.

    China Ordnance Industry Survey and Geotechnical Institute Co., Ltd., Beijing 100053, China

  • 2.

    Beijing General Municipal Engineering Design & Research Institute Co., Ltd., Beijing 100082, China

  • 3.

    China Highway Engineering Consultants Corporation, Beijing 100089, China

  • Received Date: 2021-11-25
  • Accepted Date: 2022-09-01
  • Publish Date: 2022-10-08
    Abstract
  • Based on back-analysis of geotechnical technique, Morgenstern-Price method was employed to estimate the stability of an abandoned slag field of a highway tunnel in Tibet. The demonstrability of dammed lake formation was also analyzed. The results showed that the unstable slope of the abandoned slag field was recognized and caused by three main reasons: excavation of the slope foot, immoderately slagging and absence of drainage facility. Under normal conditions, the minimum safety factor of slope stability is 1.062, which is in a basically stable state. Under abnormal conditions (rainstorm conditions), the minimum safety factor of slope stability is 0.94, which is in an unstable state, and there was little chance of dammed lake induced by the landslide. The research results can provide reference for similar projects.

     

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