Mechanical Behavior Analysis for Parallel Small Spacing Tunnels in a Loess Region

For satisfying the requirements of the normal running and enlarged outer section in the stabling line, a parallel neighborhood metro tunnel with two different inner sections is adopted in the Xi’an Urban Rail Transit Line, one between North Zaoyuan Road and Hancheng Road. Based on the characteristics of the different inner sections and small clear spacing, 2D-FEM was applied to simulate and analyze four construction schemes, of which the shield method was adopted in the left tunnel with a small inner section, and double-heading construction method or cross diaphragm method for the right tunnel with a large inner section. The results show that compared with the construction scheme, the tunnel with a small inner section is excavated first. The larger tunnel, by double-heading construction, is first accomplished and can evidently reduce the disturbance effect on the surrounding rock and reach a better mechanical state of tunnel lining in order to ensure safety construction.

Language

  • English

Media Info

  • Media Type: Digital/other
  • Features: Figures; References; Tables;
  • Pagination: pp 27-33
  • Monograph Title: Geo-China 2016: Emerging Technologies in Tunnel Engineering, Modeling, Design, Construction, Repair, and Rehabilitation

Subject/Index Terms

Filing Info

  • Accession Number: 01608923
  • Record Type: Publication
  • ISBN: 9780784480038
  • Files: TRIS, ASCE
  • Created Date: Jul 21 2016 3:04PM