Combined loaded pile bearing capacity transfer matrix general solution method

A technology of transfer matrix and load-bearing piles, which is applied in special data processing applications, complex mathematical operations, instruments, etc., and can solve problems such as limited application range, easy business trips, and cumbersome steps

Active Publication Date: 2017-05-10
CEEC JIANGSU ELECTRIC POWER DESIGN INST
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Problems solved by technology

[0004] The purpose of the present invention is to overcome the deficiencies in the prior art, provide a method for general solution of the bearing capacity transfer matrix of combined loaded piles, and

Method used

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  • Combined loaded pile bearing capacity transfer matrix general solution method
  • Combined loaded pile bearing capacity transfer matrix general solution method
  • Combined loaded pile bearing capacity transfer matrix general solution method

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Experimental program
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Embodiment

[0201] 1. Verify the correctness of the unified p-y curve model

[0202]Since the research literature on the calculation of the bearing capacity of horizontally loaded piles without considering the vertical load is more comprehensive than that of combined loaded piles, based on the special case of combined loaded piles without considering the axial load, the unified expression for the p-y curve is Correctness verification.

[0203] ①Linear elastic model verification

[0204] A constant straight variable section pile is embedded in sandy soil and soft rock. Sand layer thickness H 1 =7.925m, rock thickness H 2 = 12.192m. The soil resistance modulus of the first layer of sandy soil is k 1 =1.04×10 4 z kN / m 2 (z is calculated from the ground); the soil resistance modulus of the second layer of soft rock is k 2 =5.1386×10 4 +5.91×10 3 (z-7.925)kN / m 2 (according to the empirical formula back calculation) and k 2 =4.9573×10 4 +7.419×10 4 (z-7.925)kN / m 2 (Based on the i...

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Abstract

The invention discloses a combined loaded pile bearing capacity transfer matrix general solution method. The method comprises the following steps that a combined loaded pile general solution stress analysis model is built, and a general expression convenient for finding pile-soil interaction relation during the general solution is provided; according to the one-dimensional linear characteristics of a transfer matrix, discretization, uniformization and constant processing are conducted on the soil resistance coefficient, the distribution of axial force of a pile and horizontal load distribution of the pile; analytical general solutions of the transfer matrix coefficient of a free section of the pile, the transfer matrix coefficient of a flexible section of the pile and the transfer matrix coefficient of a plasticity section of the pile are obtained by means of the Laplace direct-inverse transform derivation; based on the principle of the transfer matrix method, boundary conditions of the pile top and the pile end are substituted, and accordingly the combined loaded pile bearing capacity general solution is obtained. In the method, the analytical expression of the transfer matrix coefficients is very simple, programming calculation is convenient, the method is very good in adaptability and universality, and the problem of combined loaded pile bearing characteristics under various working conditions in the geotechnical engineering can be well solved.

Description

technical field [0001] The invention relates to a general solution method for the bearing capacity transfer matrix of combined loaded piles. Background technique [0002] At the beginning, the pile foundation was mainly designed to bear the vertical bearing capacity of the superstructure. With the change of engineering requirements, horizontal loaded piles appeared mainly to bear the horizontal load. However, with the in-depth research on the bearing characteristics of foundation piles and the gradual improvement of the theory, it is found that the pile foundation in actual engineering usually bears not only the vertical load of the pile top, but also the horizontal load at the same time, that is, the combined load, such as Bridge pile foundation, offshore wind turbine single pile foundation, etc. [0003] The horizontal force under the combined load causes the pile body to generate greater internal force and displacement, and the vertical component force also produces addi...

Claims

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Application Information

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IPC IPC(8): G06F17/50G06F17/13G06F17/16
CPCG06F17/13G06F17/16G06F30/17G06F2111/10G06F2119/06
Inventor 竺明星王磊卢红前彭秀芳吉春明黄万山王广兵王泽国
Owner CEEC JIANGSU ELECTRIC POWER DESIGN INST
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