Orthogonal numerical simulation on stability of urban underground cavities

The effects of cavity shape factors and mechanical parameters on the stability of underground cavity are studied by orthogonal numerical simulation test. According to the characteristics of underground cavities in the city, the orthogonal numerical values of six factors and five levels are carried out by selecting the factors such as cavity span, cavity height, overlying soil thickness, pavement load, cohesive force and internal friction angle. The comprehensive evaluation model of multi-index orthogonal simulation test based on index satisfaction is set up, and four indexes of roof settlement, minimum principal stress, maximum principal stress and plastic zone volume are selected to study the multi-index comprehensive evaluation and sensitivity analysis. The results show that the pavement load and void span is the most sensitive to the stability of underground cavity. The cohesion and thickness of overlying soil are the second sensitive cause, and the influence of cavitation height and internal friction angle are the least.

• Record URL:
  https://doi.org/10.1007/s42947-019-0050-z
• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/issn/19966814
• Supplemental Notes:
  • © Chinese Society of Pavement Engineering. Production and hosting by Springer Nature 2019.
• Authors:
  • Xu, Lingshun
  • Wang, Long
  • Zhang, Yuxi
• Publication Date: 2019-7

Language

• English

Media Info

• Media Type: Web
• Features: Figures; References; Tables;
• Pagination: pp 423-429
• Serial:
  • International Journal of Pavement Research and Technology
  • Volume: 12
  • Issue Number: 4
  • Publisher: Springer Publishing
  • ISSN: 1996-6814
  • EISSN: 1997-1400
  • Serial URL: https://link.springer.com/journal/42947

Subject/Index Terms

• TRT Terms: Orthogonality; Principal stresses; Stability (Mechanics); Urban areas
• Uncontrolled Terms: Numerical simulations; Pavement loads; Underground cavities
• Subject Areas: Geotechnology; Highways; Pavements;

Filing Info

• Accession Number: 01715927
• Record Type: Publication
• Files: TRIS
• Created Date: Sep 9 2019 3:06PM