J4 ›› 2011, Vol. 41 ›› Issue (1): 188-194.

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Experimental of Pore Pressure of Reinforced Soft Clay Around Tunnel Under Subway Vibrational Loading

WANG Yuan-dong1,2, TANG Yi-qun1,2, LIAO Shao-ming1,2,LI Ren-jie1   

  1. 1.Department of Geotechnical Engineering, Tongji University| Shanghai 200092, China;
    2.Key Laboratory of Geotechnical and Underground Engineering of Ministry of Education, Tongji University, Shanghai 200092, China
  • Received:2010-04-10 Online:2011-01-26 Published:2011-01-26

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Abstract:

Because of the deformation resulted from the vibrational loading around the tunnel near the Hailun road station of Line 4 of Shanghai Metro, the phenomenon of partial cracks and water penetration occurred seriously. Through the dynamic triaxial tests under controlling the stress of reinforced soft clay obtained from the soil around the tunnel near the Hailun road station of Line 4 of Shanghai Metro, the laws of dynamic pore pressure by vibrational loading of subway were analyzed by taking into account of the influence of the confined pressure, consolidation ratio, cyclic loading amplitudes and vibration frequency. The results show that the pore pressure of reinforced soft clay increased with the increase of cyclic number and cyclic loading amplitudes while decreased with the increase of confined pressure and vibration frequency under the same circumstance. Also, the laws of residual pore pressure of reinforced soft clay could be forecasted by quadratic logarithmic relationship curve model.

Key words: subway vibrational loading, loading, reinforced soft clay, GDS dynamic triaxial test, pore pressure

CLC Number: 

  • TU411.8
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