The Nonlinear Analysis of Sensitivity of the Plastic Zone of Surrounding Rock in Underground Caverns

Abstract:

As the depth and the length of the various underground cavern is increasing, the stability analysis of surrounding rock is very important. This paper first gives the analytical solution equation of the circular tunnel. About the city-gate water tunnel with no analytical solution, it can be solved by numerical method, which is based on the large finite element software ANSYS. The form of a calculation model for conveyance city-gate water tunnel was established. With the D - P criterion, it is nonlinear calculated for the computation of water conveyance tunnel. Then it is obtained that the stress characteristic and development of plastic zone characteristics of the surrounding rock of city-gate tunnel. It also gives the relationship between the development of plastic zone, plastic strain and coefficient of horizontal pressure, the internal friction angle. The last, it is analyzed the relationship between the different parameters and the plastic zone development of different parts of tunnel cavern. This result can provide technical reference for design and the tunnel construction.

• Periodical: Advanced Materials Research (Volumes 926-930)
• Pages: 687-692
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.926-930.687
• Online since: May 2014
• Authors: Zhi Fang Tian*, Zhi Min Su, Nian Hong Jiang, Xue Lu, Jian Bing Zhu
• Keywords: Parameter Sensitivity, Plastic Range, Stability of Surrounding Rock, Underground Cavities

References

[1] R. E. Goodman, G. H. Shi. Block Theory and its Application to Rock Engineering[M]. New-York：Prentice Hall. (1985).

[2] D. J. Naylor'GN pande. Finite Elements in Geotechnical Engineer, Pineridge Press, SwanseaU. K. (1981).

[3] Baifang Zhu. The Finite Method Theory and Application. Water Conservancy and Hydropower Press [M] , 1998. (In Chinese).

[4] Weiyuan Zhou. Advanced Rock Mechanics [M]. Beijing：Water Conservancy and Hydropower Press, 1990. (In Chinese).

[5] Jiaxuan Mai. The Hydraulic Structures. Tsinghua University Press [M], 2005. (In Chinese).

[6] Qianhua Que, Changjian Tan. ANSYS Advanced Engineering Application Examples Analysis and Secondary Development, Electronic Industry Press[M], 2006. (In Chinese).

[7] Su Haidong. Shield Tunneling Method of Plane Nonlinear Finite Element Analysis [J]. Yangtze River Academy of Sciences Institute Report, 2000, 17(4)：22～26. (In Chinese).

[8] Wittke. Numerical Methods in Geomechanics, A. A. Balkema, (1979).