›› 2012, Vol. 33 ›› Issue (4): 1217-1222.

• Numerical Analysis • Previous Articles     Next Articles

Three-dimensional numerical simulation of influences of ground subsidence on composite foundation

XIA Li-nong1, 2，MIAO Yun-dong2，LIAO Chang-bin2   

  1. 1. Department of Civil Engineering, Changsha University, Changsha 410003, China; 2. College of Civil Engineering and Mechanics, Xiangtan University, Xiangtan, Hunan 411105, China
  • Received:2010-09-06 Online:2012-04-13 Published:2012-04-26

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Abstract: Based on three-dimensional numerical simulations of composite foundation both on the condition of ordinary use and ground subsidence, changes of settlement, skin friction distribution and axial force of pile in composite foundation after ground subsidence induced by groundwater level lowering are analyzed. It is shown that, settlement of reinforced pile and foundation increases, and neutral point in pile moves down gradually, axial forces in reinforced pile increase gradually along with ground subsidence increasing. In reinforced piles of composite foundation, neutral point in centre pile is the lowest, neutral point in border pile is the second, neutral point in corner pile is the highest. Along with ground subsidence increasing, the differences of neutral point position in centre pile, border pile and corner pile decrease gradually, the length impacted by negative skin friction of upper part pile over neutral point lengthens gradually, value of negative skin friction increases gradually.

Key words: ground subsidence, composite foundation, three-dimensional numerical simulation, settlement, skin friction

CLC Number: 

  • TU 478
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