Using the Schwarz Alternating Method to Identify Critical Water-Resistant Thickness between Tunnel and Concealed Cavity

This paper aims to estimate the stability of the water-resistant strata between the tunnel and the small-medium-sized concealed cavity filled with high-pressurized water or other fillings at optional position around tunnel through solving the double-hole problem. The analytical method to identify the critical water-resistant thickness is proposed based on the Schwarz alternating method and Griffith strength criterion, and the program to calculate the critical thickness was prepared according to this method using mathematical software. Parametric study of the critical thickness indicates that the critical water-resistant thickness will increase with the buried depth of the tunnel and cavity size; the lateral pressure coefficient has more complicated influence on the critical thickness, which is affected by cavity position; when the cavity is filled with sand or gravel, the critical water-resistant thickness will decrease with the increase of the filling pressure; and when the cavity is filled with the high-pressurized water, the critical thickness will decrease as the water pressure initially and increase afterwards. The analytical result of the critical thickness is consistent with that obtained by numerical simulation using the user-defined program based on FLAC3D, demonstrating the rationality and feasibility of the proposed method in this study.

• Record URL:
  https://doi.org/10.1155/2018/8401482
• Record URL:
  https://doi.org/10.1155/2018/8401482
• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/issn/16878086
• Supplemental Notes:
  • © 2018 Jiaqi Guo et al.
• Authors:
  • Guo, Jiaqi
  • Chen, Jianxun
  • Chen, Fan
  • Huang, Shanxiu
  • Wang, Hongyu
• Publication Date: 2018

Language

• English

Media Info

• Media Type: Web
• Features: Figures; References;
• Pagination: Article ID 8401482
• Serial:
  • Advances in Civil Engineering
  • Volume: 2018
  • Publisher: Wiley
  • ISSN: 1687-8086
  • EISSN: 1687-8094
  • Serial URL: https://onlinelibrary.wiley.com/journal/7074
• Publication flags:

  Open Access (libre)

Subject/Index Terms

• TRT Terms: Hydraulics; Railroads; Strata; Thickness; Tunnels; Water pressure
• Identifier Terms: Schwarz alternating method
• Subject Areas: Bridges and other structures; Hydraulics and Hydrology; Railroads;

Filing Info

• Accession Number: 01660694
• Record Type: Publication
• Files: TRIS
• Created Date: Feb 20 2018 9:36AM