›› 2013, Vol. 34 ›› Issue (8): 2174-2180.

• Fundamental Theroy and Experimental Research • Previous Articles     Next Articles

Research of constitutive relation of granular material and stability of pile group foundation

GAO Zi-kun1, 3, SHI Jian-yong2   

  1. 1. Department of Civil Engineering, Putian University, Putian, Fujian 351100, China; 2. Geotechnical Research Institute, Hohai University, Nanjing 210098, China; 3. College of Water Conservancy and Hydropower Engineering, Hohai University, Nanjing 210098, China
  • Received:2013-03-13 Online:2013-08-12 Published:2013-08-13

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Abstract: For sedimentary soil which completes the consolidation due to the gravity of the overburden, the value of its modulus is directly related to the value of pre-consolidation pressure. The main factors of constitutive relation for geotechnical material are first analyzed, considering its changes with depth and volumetric strain. Secondly, pile foundation stability problem’s solving format is established for the finite element calculation, considering horizontal load and downstream scouring. Finally, based on the analytical results of the downstream erosion and contact force of different-plane-position pile due to asymmetric horizontal loads, the stress concentration and flexion instability and overall stability are analyzed for group pile foundation in large and complex engineering, considering synergism in the system of piles and soil and pile cap, so as to provide a method for quantitative calculation.

Key words: granular material, constitutive relation, pile group foundation, synergism in the system

CLC Number: 

  • TU 443
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