Calculation of the foundations in compacted excavations with extended base, applying boundary elements method

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DOI: https://doi.org/10.32347/0475-1132.38.2019.28-33
Keywords:
Bearing capacity, foundations in compacted excavations, boundary elements method.

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Alla Morgun
Vinnytsia National Technical University, 21029, Ukraine, Vinnytsya, Khmelnytsky highway 95
https://orcid.org/0000-0002-4701-339X
Ivan Met
Vinnytsia National Technical University, 21029, Ukraine, Vinnytsya, Khmelnytsky highway 95
https://orcid.org/0000-0003-0568-730X
Violeta Zadorozhniuk
Vinnytsia National Technical University, 21029, Ukraine, Vinnytsya, Khmelnytsky highway 95
https://orcid.org/0000-0001-9184-5372

Abstract

Numerical realization according the boundary element method (BEM), intended for the determination of the pressed piles strength with the expanded basis on the base of the provisions of the dispersive soil mechanics is carried out. In the given research the mathematical tool is supplemented with the experimental laws of shearing soil deformation - general regularities of the soil volume change in case of shearing (dilatance and contraction) involving V.M.Nikolaevskyi, I.P.Boiko dilatancy relations are taken into account. Special attention is paid to practical application of new technology of the predicted calculation of the efficient bored piles carrying capacity –the suggested method of the numerical solution by the boundary element method (BEM) of the springplastic problem of the dispersive soil mechanics, using non-associated plastic flow rule at the nonlinear stage of their work. BEM is a new numerical approach to the solution of 3D boundary problems, it has considerable advantage - digitization is carried out not in the middle of the studied area where the solution is searched but on its boundary. Foundations, made of the bored piles are one of the advanced structures, widely used in the construction sphere. To increase their carrying capacity, the expansion of the pile bases is performed. The analysis of their efficiency is necessary and the task is actual. Bored piles show high technological and economic efficiency, their wide application is expedient, these piles promote the saving of the materials and economic resources. In the suggested model the procedure of the step-by-step loading and O.A. Iliushin method of spring solutions is used ; Mises-Schleichler-Botkin criterian is involved as the criterion of soil work transition into plastic state. The accumulated technique allows to obtain the stress-strained state of the system “base-bored pile” at all the stages of loading, this state depends both on engineering-geological characteristics of the soil and on the geometry of the foundation. Introduction of modern methods of calculation is one of the ways of reduction the cost of the foundation constructions.

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How to Cite
Morgun, A., Met, I., & Zadorozhniuk, V. (2019). Calculation of the foundations in compacted excavations with extended base, applying boundary elements method. Bases and Foundations, (38), 28–33. https://doi.org/10.32347/0475-1132.38.2019.28-33
Issue
No. 38 (2019): Bases and Foudations
Section
Статті
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Author Biographies

Alla Morgun, Vinnytsia National Technical University, 21029, Ukraine, Vinnytsya, Khmelnytsky highway 95

Head of the Department of Construction, Urban Economy and Architecture Dr. Sc. (Eng.), Professor

Ivan Met, Vinnytsia National Technical University, 21029, Ukraine, Vinnytsya, Khmelnytsky highway 95

Associate Professor of the Department of Construction, Urban Economy and Architecture Ph.D., Assistant Professor

Violeta Zadorozhniuk, Vinnytsia National Technical University, 21029, Ukraine, Vinnytsya, Khmelnytsky highway 95

Postgraduate student of the Department of Construction, Urban Economy and Architecture Postgraduate student

References

Boiko I.P., Sakharov O.V. (2004). Napruzhenodeformovanyi stan gruntovoho masyvu pry pobudovi novykh fundamentiv poblyzu isnuiuchykh budynkiv [Stress-strain state of soil body in the process of new foundations construction near the existing buildings]. Osnovu i fundamenty: Mizhvidomchyj naukovotekhnichnyj zbirnyk. Kyiv: KNUBA, 28, 3-10 (in Ukrainian).

Brebbia K., Telles G., Vrubel L. (1987). Metodyi granichnyih elementov [Boundary elements technique]. per. s angl. L. G. Korniychuka. Moskva: Mir. 524 (in Russian).

Morgun A.S. (2016) Neliniini problemy mekhaniky hruntiv: monohrafiia. [Nonlinear problems of soil mechanics: monograph]. Vinnytsia, VNTU, 122 (in Ukrainian).

Nikolaevskiy V.N. (1975) Sovremennyie problemyi mehaniki gruntov [Modern problems of soil mechanics]. Opredelyayuschie zakonyi mehaniki gruntov. Moskva: Strojizdat, 210 – 227. (in Russian).

Krutov V.I., Starodvorskiy V.V., Shaevych V.M. (1983) Konstruktsii fundamentov v vyitrambovannyih kotlovanah dlya ob'ektov agropromyishlennyih kompleksom v seysmicheskih rayonah [Constructions of the foundations in compacted excavations for the objects of agrarian – industrial complexes in

seismic regions]. OFMG, 5. Moskva: Strojizdat,

-11 (in Russian).