›› 2014, Vol. 35 ›› Issue (S2): 488-494.

• Geotechnical Engineering • Previous Articles     Next Articles

Anti-seismic stability analysis of entrance and high slope of water tunnel for a nuclear power plant

BAI Guang-bin1, 2, ZHAO Jie3, YI Jian3   

  1. 1. Institute of Civil Engineering, Dalian University of Technology, Dalian, Liaoning 116085, China; 2. Dalian Municipal Construction Engineering Labor Insurance Management Office, Dalian, Liaoning 116001, China; 3. Dalian University R&D Center of Civil Engineering Technology, Dalian University ,Dalian, Liaoning 116622, China
  • Received:2014-03-26 Online:2014-10-31 Published:2014-11-12

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Abstract: For a nuclear power and water tunnel project, a large-scale three-dimensional finite difference Flac3D model is established to simulate the seismic response under the action of seismic waves schedule in tunnel portal section, adopting nonlinear dynamic analysis method. Simultaneously, two-dimensional finite element model of backfill high-slope is created for slope stability analysis of tunnel entrance under the action of earthquake ground motion to draw the sliding surface of slope position and dynamic time history curve of safety coefficient. Through the input of the site seismic wave and the investigation of the structure response characteristics of the tunnel entrance and slope, duration curve of tunnel lining force under seismic waves action and tunnel lining figure can be obtained. Meanwhile, high slope safety factor of tunnel can be given. The analytical results show that the seismic weak parts of the tunnel entrance are at tunnel spandrel and the sidewall. The analytical method and conclusions have a certain reference value for the seismic design of tunnels.

Key words: tunnel entrance, high slope, seismic resistance, stability, nuclear power

CLC Number: 

  • P 315.9
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