Paper Title:
Numerical Study on the Relationship of the Axis Orientation of Deeply Buried Circular Tunnel and the Direction of Horizontal In Situ Stress
  Abstract

Deeply buried tunnels usually lie in high stress fields, whose horizontal stress which is not uniform is far larger than vertical stress, and their stability is dominated by the original in-situ stresses. With three-dimensional nonlinear finite element method, the axis orientation effects of tunnel on the displacement and stability of two types of surrounding rocks are studied systematically for one water diversion project. The tunnel lies in different original stress fields whose maximum horizontal principal stress is parallel with or perpendicular to the axis and lies in different kinds of rocks. The numerical analysis results show that the plastic zones develop in side wall of tunnel mostly when the horizontal maximum principal stress is parallel with the tunnel axis while the plastic zones distribute in the top and bottom of tunnel when the horizontal maximum principal stress is perpendicular to the tunnel axis. It is concluded that the principle of tunnel axis should be parallel with horizontal maximum principal stress regulated by the “specification for design of hydraulic tunnel” is not available for the stability of tunnel always.

  Info
Periodical
Chapter
Chapter 8: Material Processing Technology
Edited by
Huixuan Zhang, Ye Han, Fuxiao Chen and Jiuba Wen
Pages
1723-1727
DOI
10.4028/www.scientific.net/AMM.117-119.1723
Citation
J. Q. Wang, "Numerical Study on the Relationship of the Axis Orientation of Deeply Buried Circular Tunnel and the Direction of Horizontal In Situ Stress", Applied Mechanics and Materials, Vols. 117-119, pp. 1723-1727, 2012
Online since
October 2011
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$32.00
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