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Protection of objects from the influence of long-term dynamic loads

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Category: Geotechnical and mining mechanical engineering, machine building

Last Updated on 17 July 2018

Published on 03 July 2018

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Authors:

O. V. Solodyankin, Dr. Sc. (Tech.), Prof., orcid.org/0000-0002-0837-6438, National Mining University, Dnipro, Ukraine, e-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.; This email address is being protected from spambots. You need JavaScript enabled to view it.; Shapvv27@ gmail.com

N. M. Shepel, Cand. Sc. (Tech.), orcid.org/0000-0001-9980-5615, National Mining University, Dnipro, Ukraine, e-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.; This email address is being protected from spambots. You need JavaScript enabled to view it.; Shapvv27@ gmail.com

V. H. Shapoval, Dr. Sc. (Tech.), Prof., orcid.org/0000-0003-2993-1311, National Mining University, Dnipro, Ukraine, e-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.; This email address is being protected from spambots. You need JavaScript enabled to view it.; Shapvv27@ gmail.com

Abstract:

Purpose. The paper is devoted to justification of rational parameters of the protective structure for the existing buildings located on the loess soils and subjected to the influence of vibrodynamic loads from the surface source, which allows reducing the tilt of the structure and the settlement of the foundation.

Methodology. The methods of numerical modelling of geotechnical processes for estimating the parameters of the stress-strain state of the “soil-structure” system are applied.

Findings. It is established that the protection of the building foundation located on the loess soil from the surface dynamic load is provided by an anti-vibration barrier (protective shield) made of a material with the deformation modulus E 15 000 MPa. It is proved that the foundation deformations decrease nonlinearly with an increase in the barrier depth from 15 to 25 m, and at a barrier depth of H 20 m there is a maximum reduction of the foundation settlement and tilt of the building. It is shown that from the viewpoint of manufacturability and cost efficiency, the most rational is a protective barrier made of soil-cement piles created by the jet-grouting technology.

Originality. A new numerical model of the “soil-structure” geotechnical system was developed to evaluate the parameters of the stress-strain state of the loess soil, underlying the buildings and structures. A distinctive feature of the model is the use of values of the strength parameters of loess soils obtained during long-term dynamic tests under laboratory conditions. The regularities of the change in the stress-strain state of the “soil-structure” geotechnical system under the influence of long dynamic loads from the surface source for various parameters of the vibration shield are investigated.

Practical value. The developed numerical model makes it possible to evaluate the impact of dynamic loads from surface sources on objects located on loess soils. The obtained parameters of protective screens can be used for protection of objects located on loess soils in the area of dynamic loads from technological equipment and transport.

References.

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