Rigid bearing platform lower pile top vertical force calculation method considering foundation pile rigidity distribution difference

Abstract

The invention discloses a rigid bearing platform lower pile top vertical force calculation method considering a foundation pile rigidity distribution difference. The method comprises the following steps: the bending moment acting on a rigid bearing platform at the top of a foundation pile, the equivalent resultant force of vertical loads and the vertical deformation rigidity of each foundation pile are obtained; and the pile top vertical force is obtained through calculation according to the bending moment, the equivalent resultant force of the vertical load and the vertical deformation rigidity. Aiming at the problem of pile top vertical force calculation when the vertical stiffness of all or part of foundation piles under a rigid foundation is different and the vertical uplift stiffnessand the compressive stiffness of the same foundation pile are different, a complete pile top vertical force calculation formula and a corresponding foundation pile stiffness iterative algorithm are given; on the basis, an automatic algorithm that the vertical force of the pile top changes along with the change of the action direction of the horizontal load is provided for pile foundations needingto consider the action direction of the horizontal load, such as bearing wind load.

Description

technical field [0001] The invention relates to a method for calculating the vertical force of a pile top under a rigid cap in consideration of differences in stiffness distribution of foundation piles, and belongs to the technical field of civil engineering. Background technique [0002] "Building Pile Foundation Technical Specifications" JGJ 94-2008, "Wind Turbine Foundation Design Regulations (Trial)" FD 003-2007 and other regulations and specifications all give the calculation formula for the vertical force of the pile top under the rigid foundation; these formulas Only applies to all piles where the compressive stiffness and the pullout stiffness are the same constant. With the application of "variable stiffness technology of foundation piles", the "arrangement scheme of long and short piles" of foundation piles under the foundation is sometimes used in actual projects; Restricted by construction conditions, the added piles will adopt another type of piles (for example...

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Problems solved by technology

[0003]Aiming at the deficiencies of the prior art, the present invention proposes a method for calculating the vertical force of the pile top under the rigid cap, which considers the difference in the stiffness distribution of foundation piles, in order to solve the current The problem that the calculation formula of the vertical force of the foundation pile is not applicable in the existing technology

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