›› 2008, Vol. 29 ›› Issue (5): 1275-1279.

• Fundamental Theroy and Experimental Research • Previous Articles     Next Articles

Test study and finite element analysis of CFG composite foundation

HUANG Sheng-gen   

  1. Faculty of Engineering, China University of Geosciences, Wuhan 430074, China
  • Received:2007-05-09 Online:2008-05-10 Published:2013-07-24

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Abstract: According to the results of in-situ tests, the failure mechanism of composite foundation is mainly decided by the interaction between soil and cushion in the state of thick cushion or under embankments; and the practical bearing capacity of a pile in composite foundation is not brought into full play. The following rules are got from the calculation results of FEM: (1) the stress ratio of pile to soil (n) decreases with the thickness increasing; as the thickness exceeds 300 mm, the influence of cushion thickness on n reduces sharply; as the thickness exceeds 500 mm, the influence of cushion thickness is small. (2) When the cushion thickness is relatively thin ( 100 mm), the influence of cushion modulus on n is great; as the thickness exceeds 300mm, the influence decreases; as the thickness exceeds 500 mm, the influence is very small. (3) as the rigidity of bearing plate is smaller than 6.25 MN•m2, the stress ratio of pile to soil increases with the rigidity increasing; as the rigidity exceeds 6.25 MN•m2, the influence of rigidity on n is very small.

Key words: CFG composite foundation, finite element method, stress ration of pile to soil, cushion

CLC Number: 

  • TU 473.1
  • Please send e-mail to pingzhou3@126.com if you would like to read full paper in English for free. Parts of our published papers have English translations.
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