Methods of the analytical construction of diagrams of the vibratory drum vertical movements into the soil for the compacted soil strength assessment

Autor: V N Tarasov, I V Boyarkina, G. N. Boyarkin, V. S. Serebrennikov
Rok vydání: 2020
Předmět:
Zdroj: Journal of Physics: Conference Series. 1546:012141
ISSN: 1742-6596
1742-6588
DOI: 10.1088/1742-6596/1546/1/012141
Popis: The soil compaction process by a vibratory drum is performed during a slow horizontal progressive movement and high-frequency vertical movements of the vibratory drum by a vibration exciter. Let’s consider the process of a single vertical movement of the vibratory drum into the soil on a horizontal compacted surface. As a result of the vibratory drum progressive movement vertical movements take place on new horizontal areas of compacted soil. The problem of the vibratory drum cylindrical surface vertical indentation into the soil is first presented in a differential form. The stress distribution law as per the soil depth is set taking into consideration the compacted soil layer thickness h 0 and general soil deformation modulus E 0. The relative vertical deformation of elementary soil columns according to Hooke’s law is determined as the ratio of the vertical movement of the vibratory drum elements to the thickness of the layer to be compacted. The analytical integration of equations connecting the vertical load on the vibratory drum with elementary forces of the soil reactions on the vibratory drum bearing surface has been performed. The state of soil strength under the vibratory drum is determined as the initial state σ0 and additional state Δσ, caused by an increase of the soil strength due to the compaction σ=σ0 + εE 0, caused by relative deformation. The problem of the determination of the vibratory drum vertical movement by vertical forces has been solved. Obtained analytical dependences and method allow to construct the dependence diagrams of the vibratory drum movement into the soil on different types of soils. The problem of the vibratory drum vertical movement into the soil has been analytically solved on the basis of the deformation of vertical soil columns in the form of Hooke’s law using the general soil deformation modulus E 0. The vertical interaction of the vibratory drum with the soil has been formulated as the equilibrium problem of the vertical reaction forces along the contact arc. Finite integrals have been obtained connecting the vertical load on the vibratory drum with the parameters of the soil and vibratory drum. The calculation method of the dependence diagrams of loads on the vibratory drum and vertical movements (settlement) of the vibratory drum into the soil has been developed.
Databáze: OpenAIRE
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