›› 2012, Vol. 33 ›› Issue (3): 757-766.

• Fundamental Theroy and Experimental Research • Previous Articles     Next Articles

Elastoplastic solution for deep tunnel considering influences of groundwater, grouting and lining

HU Li-sheng1, WANG Jian-xiu2, LU Yao-ru2   

  1. 1. China Railway Erju Co., Ltd., Chengdu 610031, China; 2. Key Laboratory of Geotechnical and Underground Engineering of Ministry of Education, Tongji University, Shanghai 200092, China
  • Received:2010-11-16 Online:2012-03-10 Published:2012-03-12

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Abstract: The water pressure equilibrium system of deep tunnel is composed of groundwater, surrounding rock, grouting ring and lining, which can not be systematically investigated by the traditional methods for the stress and plastic zone of tunnel. The elastoplastic solution for deep tunnel is carried out. The surrounding rock, grouting ring and lining are assumed as isotropic continuous elastoplastic medium. Based on the elastoplastic mechanics, groundwater hydraulics theory and Mohr-Coulomb criterion, the calculation formulas for stress and plastic zone of axisymmetric deep tunnel under the combined action of four factors are deduced. To calculate a deep tunnel, Matlab is adopted to edit routine for the computation. Compared with the calculated results obtained from the traditional solutions, the correctness of deduced formulas is validated; and the defects of traditional methods are indicated. The influence of grouting parameters on plastic zone and the method for deciding optimum thickness of grouting ring are also discussed.

Key words: deep tunnel, groundwater, surrounding rock, grouting ring, lining, elastoplastic solution

CLC Number: 

  • TV 554
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