›› 2014, Vol. 35 ›› Issue (S1): 42-48.

• Fundamental Theroy and Experimental Research • Previous Articles     Next Articles

Stress analysis of deep horseshoe tunnel considering support delay

LÜ Ai-zhong，QIN Yuan，CHEN Hong-yu   

  1. Institute of Hydroelectric and Geotechnical Engineering, North China Electric Power University, Beijing 102206, China
  • Received:2014-01-27 Online:2014-06-10 Published:2014-06-20

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Abstract: Based on conformal mapping method of plane elasticity complex function, the analytical solution for non-circular supported tunnel subjected to in-situ stress can be obtained. According to the boundary conditions along the inner boundary of liner and the stress and displacement continuity conditions along the liner-surrounding rock mass interface, the basic equations for solving the analytic functions of the surrounding rock and liner are given. And the stresses and displacements are calculated. In the solving process, support delay and pure bond are taken into consideration. Taking the horseshoe tunnel for example, the tangential stresses of the rock excavation boundary and the contact stresses on the liner-surrounding rock mass interfaces are obtained. The results are compared with that by the ANSYS software. The numerical example shows that the results of two methods are in good agreement.

Key words: non-circular tunnel, support delay, conformal transformation, finite element method, stress analysis

CLC Number: 

  • U 452
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