›› 2014, Vol. 35 ›› Issue (S1): 35-41.

• Fundamental Theroy and Experimental Research • Previous Articles     Next Articles

Research on deformation forecasting of tunnel surrounding rock based on viscoelastic constitutive behavior

YU Wen-sheng1, 2, PING Yang3   

  1. 1. Changsha University of Science, Key Laboratory of Road Structure & Material, Ministry of Transport of PRC, Changsha 410004, China; 2. Jiangxi Provincial Highway Investment Group Co., Ltd, Nanchang, 330025, China; 3. Research Center of Geotechnical and Structural Engineering, Shandong University, Jinan 250061, China
  • Received:2013-07-27 Online:2014-06-10 Published:2014-06-20

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Abstract: For Ⅲ, Ⅳ grade rocks, the different deformation types of tunnel surrounding rocks are analyzed and forecasted using the elasto-viscoplastic finite element method based on Jiangxi highway tunnel. First, the Ⅲ, Ⅳ grade rocks are selected, to carry out indoor shear rheological tests and analyze generalized Kelvin rheological test curve and find the flow curves agree well with the model for Ⅲ, Ⅳ grades rock samples. Based on the generalized Kelvin model, viscoelastic model is derived under the stress - strain relationship of complex stress state. Finally, the dynamic viscoelastic back analysis method of the construction process is used to calculate rock parameters, combined with inversion parameters for prediction analysis of tunnel surrounding rock deformation. The research results are applied to the actual tunnel construction to guide and revise design and construction parameters, so as to provide a reasonable basis for safe construction.

Key words: viscoelasticity, surrounding rock, shear rheology, back analysis, deformation, forecast

CLC Number: 

  • TU 452
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