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Stability analysis of subgrade cave roofs in karst region

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Abstract

According to the engineering features of subgrade cave roof in karst region, the clamped beam model of subgrade cave roof in karst region was set up. Based on the catastrophe theory, the cusp catastrophe model for bearing capacity of subgrade cave roof and safe thickness of subgrade cave roof in karst region was established. The necessary instability conditions of subgrade cave roof were deduced, and then the methods to determine safe thickness of cave roofs under piles and bearing capacity of subgrade cave roof were proposed. At the same time, a practical engineering project was applied to verifying this method, which has been proved successfu1ly. At last, the major factors that affect the stability on cave roof under pile in karst region were deeply discussed and some results in quality were acquired.

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Authors and Affiliations

  1. Geotechnical Engineering Institute, Hunan University, Changsha, 410082, China

    Chong Jiang  (蒋 冲), Ming-hua Zhao  (赵明华) & Wen-gui Cao  (曹文贵)

  2. School of Resources and Safety Engineering, Central South University, Changsha, 410083, China

    Chong Jiang  (蒋 冲)

Authors
  1. Chong Jiang  (蒋 冲)
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  2. Ming-hua Zhao  (赵明华)
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  3. Wen-gui Cao  (曹文贵)
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Corresponding author

Correspondence to Chong Jiang  (蒋 冲).

Additional information

Foundation item: Project(50378036) supported by the National Natural Science Foundation of China

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Jiang, C., Zhao, Mh. & Cao, Wg. Stability analysis of subgrade cave roofs in karst region. J. Cent. South Univ. Technol. 15 (Suppl 2), 38–44 (2008). https://doi.org/10.1007/s11771-008-0433-9

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  • DOI: https://doi.org/10.1007/s11771-008-0433-9

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