Foundation pile foundation model analyzing method and test device for same

Abstract

The invention discloses a foundation pile foundation model analyzing method and a test device for the same. The method includes: building a dispersing spring support model of to-be-tested pile-earth related actions, building a to-be-tested pile inner force and deformation equation and transmission matrix, and a to-be-tested pile foundation reaction analyzing basic equation, building different founding reaction models and programming a corresponding computerizing program, arranging the foundation pile foundation test device in the field, measuring horizontal displacement and turning angle, on the ground, of the to-be-tested pile, and computerizing and analyzing according to the computerizing program to determine corresponding foundation reaction model parameters. The foundation pile foundation test device comprises a standard beam, a standard pile, a reaction pile and the to-be-tested pile which are disposed on the ground, a jack and a force sensor are connected between the reaction pile and the to-be-tested pile, and a angle measuring device and a displacement measuring device are disposed on the to-be-tested pile. By on-site pile testing, multiple hypothesis models can be built for the foundation pile foundation, related model parameters can be determined, and certain universality is achieved.

Description

technical field [0001] The invention relates to the technical field of foundation pile foundation reaction force test and analysis for buildings and bridge engineering, in particular to a foundation pile foundation model analysis method and a test device used for the method. Background technique [0002] At present, in the field of construction and bridge engineering, the design and calculation of horizontal bearing capacity and buckling stability of piles generally adopt the linear elastic foundation model assumed by Winkler, because its basic concept is clear and the calculation is relatively simple. When the deflection deformation of foundation piles is small , the hypothesis is in good agreement with the actual. The linear elastic foundation reaction mathematical model can be expressed by formula (1): [0003] q(x)=mb 0 x ω y=ky (1) [0004] Among them, q(x) in formula (1) is the foundation reaction force, x is the calculated depth of the pile below the ground or loc...

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Problems solved by technology

The layered structure of foundation soil is a common geological feature, and the reaction force of each layer of soil affects the horizontal bearing capacity and stability of the pile, especially for slender elastic piles. Simply using a certain equivalent foundation reaction force to calculate the stability of piles may produce large errors

[0020] 3) Although the "Technical Specifications for Building Pile Foundations" (JGJ94-2008) and other relevant specifications have proposed a guiding method for the horizontal load test of a single pile, the lateral displacement y of the pile at the point where the horizontal force acts can be measured at the same time c and rotation angle θ c , but factor (3) does not use the measured parameter θ of the rotation angle c , so currently in the single pile horizontal load test, when determining y c Generally do not measure θ c , and there is no basis for y c and θ c Technical method for analysis of various linear elastic foundation hypothetical models based on measured values

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