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Three-Dimensioned Numerical Analysis of Rigid Pile Composite Foundation under Lateral Loads

Author: ZuoChao
Tutor: BaoPeng
School: Henan University
Course: Detection Technology and Automation
Keywords: Rigid pile composite foundation Three - dimensional numerical analysis Nonlinear Horizontal load Horizontal bearing capacity
CLC: TU473.1
Type: Master's thesis
Year: 2009
Downloads: 36
Quote: 1
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Abstract


Rigid pile composite foundation stiffness concrete piles or high-grade CFG pile as an artificial foundation of the vertical reinforcement . By setting the cushion , the stress between the piles and piles of soil , respectively, regulate and balance , reducing the stress concentration of the substrate , and provided favorable means in order to fully utilize the potential of the soil between piles , save the project cost , and has been widely used. Theoretical study of rigid pile composite foundation is very systematic numerical analysis method is a more effective way , numerical analysis method for rigid pile composite foundation are mostly concentrated in plane strain under the assumption that the two-dimensional plane and single pile simple three-dimensional analysis . Study of three - dimensional nonlinear modeling is too much trouble , calculated for a long time , not easy to convergence and other reasons , the study's not much information . In this paper, finite element analysis software ANSYS as a tool, through the establishment of rigid pile composite foundation finite element model of three - dimensional nonlinear single pile bearing capacity characteristics of rigid pile composite foundation under horizontal load level analysis . The research shows that : (1 ) in the rigid pile composite foundation , due to the presence of cushion , can greatly improve the horizontal bearing capacity of the pile . (2 ) the thickness of the cushion directly affect the level of rigid pile composite foundation bearing capacity characteristics , too large or too small cushion thickness will increase the the rigid pile bending moment and deflection is not conducive to the safety of the pile should be a reasonable choice of the thickness of the cushion can be obtained from the calculation of this article , the thickness of the cushion should take 200-300 mm is appropriate . (3 ) horizontal loads that may arise under the location of the maximum tensile strain only with the length of the pile , and has nothing to do with other factors , so precisely, it may produce the maximum tensile strain in 0.175L ( L for the length of the pile ) . (4) horizontal load displacement of pile , relatively large in more than 0.175L 0.175L relatively small .

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CLC: > Industrial Technology > Building Science > Soil mechanics,foundation engineering > Foundation > Pile foundation and deep foundation > Pile
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