Set-up method for generalized Bingham soft soil rheological deformation analogue body

Abstract

The generalized Bingham soft earth rheologic deformation model is for building structure deformation controlling design and relevant research. The model establishing process includes the following steps: a. inputting embankment design parameters; b. inputting composite foundation processing parameters; c. automatic grid division; e. inputting model parameters; f. embankment load increment; g. reclamation time increment; h. coupling plastomer with generalized Bingham body based on Bitot consolidation formula; i. determining unit stiffness matrix and establishing code and characteristic of each grid unit body; j. constituting overall rigidity matrix; k. finite element solving Bitot consolidation formula to find the solutions in the points within the researched space; l. judging whether to meet the boundary condition, and if no, returning to i.; m. calculating the node force, displacement and hole pressure and returning results to f. and g.; and n. outputting results to end.

Description

technical field [0001] The invention is a method for controlling deformation design of building structure and related research. In particular, a method for establishing a generalized Bingheim soft soil rheological deformation simulation body directly applied in the field of civil engineering. Background technique [0002] In recent years, my country has been carrying out large-scale infrastructure construction, such as the construction of key projects such as highways and railways. During the construction of highways and railways, it is inevitable to pass through soft soil areas, and build highways and railways in soft soil areas. There are often many engineering problems, such as excessive subsidence and deformation of the subgrade, which affects normal traffic; vehicle jumps at the bridge head and box culvert connection parts, and the settlement of culverts affects the smooth flow of the water system, and there are hidden dangers of flood control. ...

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Problems solved by technology

[0002] In recent years, my country has been carrying out large-scale infrastructure construction, such as the construction of key projects such as highways and railways. During the construction of highways and railways, it is inevitable to pass through soft soil areas, and build highways and railways in soft soil areas. Many engineering problems often occur, such as excessive subgrade settlement and deformation, affecting normal traffic; vehicle jumping occurs at the bridgehead and box culvert connection parts, and culvert settlement affects the smooth flow of the water system, and there are hidden dangers of flood control

This is mainly due to insufficient understanding of the deformation characteristics of soft soil, or the inability to use an accurate deformation model to describe the rheological deformation characteristics of soft soil

Although many achievements have been made in this area, the understanding of the rheological properties of soft soils, such as the Maxwell model can only describe the stress relaxation phenomenon of soils, and the Kelvin model can only describe the elastic after-effect properties of soils. - The Huang model and Bingheim can only describe the ultimate strength of the soil, and these phenomena cannot accurately describe the process and phenomenon of subgrade deformation and failure

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