›› 2011, Vol. 32 ›› Issue (11): 3207-3211.

• Fundamental Theroy and Experimental Research • Previous Articles     Next Articles

Study of elastoplastic constitutive model of strongly weathered granite PartⅠ: Theoretical model and parameter inversion

CHEN Wei-zhong1, 2，CAO Jun-jie1，YU Hong-dan1，JIA Shan-po3，CHEN Pei-shuai1，LI Zhi-guo4   

  1. 1. State key Laboratory of Geomechanics and Geotechnical Engineering, Institute of Rock and Soil Mechanics, Chinese Academy of Sciences, Wuhan 430071, China; 2.Research Center of Geotechnical and Structural Engineering, Shandong University, Jinan 250061, China; 3. School of Urban Construction, Yangtze University, Jingzhou, Hubei 434023, China; 4. Hydro China Chengdu Engineering Corporation, Chengdu 610072, China
  • Received:2010-08-04 Online:2011-11-01 Published:2011-11-09

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Abstract: Xiamen subsea tunnel is the first undersea road tunnel in China. The investigation, design, engineering experience will be used for reference to other subsea tunnels’ construction. The encountered problems about rock mechanics and tunneling designs for subsea tunnel construction are more complicated than other road tunnels. There are many problems which the present criteria have not be covered yet; and all the questions are urgently needed to be solved. In order to study the mechanical characteristics of the host rock in weathered strata, a strain hardening elastoplastic model and cohesion evolution equation are established to describe the hydro-mechanical coupled behavior of the strongly weathered granite based on laboratory test results; and corresponding parameters have been identified by back analysis. The developed strain-hardening elastoplastic model can well describe the mechanical characteristics of strongly weathered granite. The method suggested in the paper is worthy to be widely used.

Key words: subsea tunnel, strong weathered granite, constitutive model, inversion analysis

CLC Number: 

  • TU 452
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