›› 2012, Vol. 33 ›› Issue (3): 892-898.

• Numerical Analysis • Previous Articles     Next Articles

Dynamic response of a circular lining tunnel in saturated soil due to moving ring load

HUANG Xiao-ji1, 2, FU Ming-fu3, XU Bin3   

  1. 1. School of Civil Engineering and Architecture, Nanchang University, Nanchang 330031, China; 2. School of Civil Engineering and Architecture, East China Jiaotong University, Nanchang 330013, China; 3. Department of Civil Engineering, Nanchang Institute of Technology, Nanchang 330099, China
  • Received:2011-03-07 Online:2012-03-10 Published:2012-03-12

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Abstract: Based on Biot’s wave theory, dynamic response of a circular lining tunnel in a saturated poroelastic soil due to a moving ring load is investigated. The liner is modeled as an elastic body and the soil is modeled as saturated porous medium. In order to uncoupling governing equations, two scalar potentials are introduced to represent the displacement for the solid skeleton, the pore fluid and the linner. According to boundary condition and continuity condition, the analytical solutions of dynamic response, such as stress, displacement and water pressure, are derived in frequency and wave-number domain by using Fourier transformation. Numerical results are obtained by inverse Fourier transformation. To compare the results, dynamic response of three tunnel models (tunnel in elasticity, tunnel in saturated soil and lining tunnel in saturated soil) is calculated. The results of numerical example show: (1) the velocity of the moving load greatly influences dynamic response of three tunnel models; (2) large difference between the tunnel in elasticity and tunnel in saturated soil, so the soil near the tunnel should be modeled as saturated porous medium in abundant water field; (3)the influence of the liner on the dynamic response of the tunnel is remarkable; so the liner effect must be considered in the dynamic analysis of the tunnel.

Key words: moving ring load, lining tunnel, saturated soil, Fourier transformation, dynamic response

CLC Number: 

  • TV 554
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