Single pile calculation method based on combination of finite element software and load transfer method

Abstract

A single pile calculation method based on combination of finite element software and a load transfer method comprises the following steps that 1, a soil body geometric model is established according to a geological exploration report, and the stress change process of each soil layer under the action of ground surface loading is calculated; 2, extracting soil effective stress and settlement data corresponding to a certain moment from a finite element calculation result; and 3, the axial bearing response of the pile foundation at the given moment is calculated through a load transfer curve method. The method aims at solving the problem that in the prior art, the influence of the short-term effect and the long-term effect of soil stress and settlement changes on the axial bearing capacity of a single pile under the heaped loading effect is difficult to calculate.

Description

technical field [0001] The invention belongs to the field of civil engineering and relates to a single pile calculation method based on the combination of finite element software and load transfer method. Background technique [0002] As the most widely used form of deep foundation, the pile foundation can transfer the load of the superstructure to the bearing layer with hard soil and high strength in the deep layer step by step, and realize the crossing of the deep soft clay layer with a small cross-section and low cost And the purpose of making the pile end support in the hard soil layer. [0003] Due to the increasing shortage of land resources, various construction projects and bridge projects are extended to coastal areas rich in soft soil. Soft soil has the characteristics of high moisture content, high compressibility and low permeability. Filling or other reasons caused local pile loading, groundwater level drop, collapsible loess, and large-area dumping of stones a...

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Problems solved by technology

[0005] The purpose of the present invention is to overcome the cumbersome process of establishing a pile-soil complex interaction analysis model with finite element software and the technical defects of low calculation efficiency and difficulty in considering the complex consolidation and creep characteristics of the soil in the single pile axial bearing capacity calculation program , give full play to the advantages of the finite element software and the single pile axial bearing capacity calculation program, and solve the calculation problem of the impact of the short-term effect and long-term effect of the soil stress and settlement change on the axial bearing capacity of the single pile in the prior art

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