›› 2010, Vol. 31 ›› Issue (11): 3459-3463.

• Fundamental Theroy and Experimental Research • Previous Articles     Next Articles

Settlement calculation of two-direction reinforced composite foundation based on Winkler model

ZHAO Ming-hua，SUN Jian-bin，ZHANG Yong-jie   

  1. Institute of Geotechnical Engineering, Hunan University, Changsha 410082, China
  • Received:2009-06-30 Online:2010-11-10 Published:2010-11-24

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Abstract:

Based on the virtual work theory and the Winkler elastic foundation model, considering nonlinear deformation of sheet and net materials and composite foundation cushions as an overall net pad as well as taking the role of the level of resistance into account in the calculation, a formula for calculating the settlement of two-direction reinforced composite foundation was deduced. The deduced formula reflects the effects of load magnitude, the replacement ratio of composite foundation, rig ties of mattress and the surrounding soil, pile-soil stress ratio, etc. Besides, two groups model tests of composite foundation are designed and a large amount of data about the load-settlement, pile-soil stress ratio are obtained. Finally, through model tests and an engineering example, the reasonableness of the formula is verified. The results indicate that the horizontal resistance of reinforced mattress helps to reduce the residual settlement; and the effects of which should be treasured.

Key words: composite foundation, two-direction reinforcement, settlement, virtual work principle, model test

CLC Number: 

  • TU 443
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