satНАУКА и ТЕХНИКАScience & Technique2227-10312414-0392Belarusian National Technical University10.21122/2227-1031-2026-25-2-132-140sat-2945Research ArticleСТРОИТЕЛЬСТВОCIVIL AND INDUSTRIAL ENGINEERINGОсновные факторы, определяющие эффективность вертикальных барьеров для снижения вибраций, распространяющихся в грунтовой средеMain Factors Determining the Effectiveness of Vertical Barriers in Reducing Vibrations Propagating through the SoilПовколасК. Э.PovkolasK. E.

Кандидат технических наук

Адрес для переписки:Повколас Константин ЭдуардовичБелорусский национальный технический университет просп. Независимости, 65,220013, г. Минск, Республика Беларусь Тел.: +375 29 622-80-36

povkolas@bntu.by

Address for correspondence:Povkolas Konstantin E.Belarusian National Technical University 65, Nezavisimosty Ave.,220013, Minsk, Republic of Belarus Tel.: +375 29 622-80-36

povkolas@bntu.by

povkolas@bntu.byБелорусский национальный технический университетБеларусьBelarusian National Technical UniversityBelarus202625042026252132140Copyright © Повколас К.Э., 20262026Повколас К.Э.Povkolas K.E.Данная работа распространяется под лицензией Creative Commons Attribution 4.0.This work is licensed under a Creative Commons Attribution 4.0 License.https://sat.bntu.by/jour/article/view/2945

Устройство вертикального барьера на пути распространения поверхностных волн в грунте в виде открытой или заполненной различными материалами траншеи считается эффективным направлением виброизоляции от действия взрывных, сейсмических, промышленных и транспортных вибродинамических воздействий. В данной работе на основе метода конечных элементов выполнено численное моделирование распространения динамических волн в грунте с устройством вертикального волнового барьера на пути их распространения. Грунтовая среда рассматривалась как пространственный упругий инерционный массив с заданным демпфированием колебаний по теории Рэлея, ограниченный неотражающими границами. Динамическая нагрузка задавалась в виде синусоиды. Изучалось изменение параметров колебаний поверхности за барьером в зависимости от материала последнего. Результаты расчетов представлены в безразмерных величинах для геометрических параметров барьера и его динамических свойств. Выявлено, что основным параметром, определяющим эффективность виброизоляции, является динамический модуль упругости материала барьера. Его увеличение или уменьшение по отношению к модулю упругости грунта приводит к снижению колебаний за барьером в направлении распространения динамических волн в грунте. Получены формулы, описывающие относительное снижение колебаний грунта за барьером в зависимости от коэффициента относительного снижения динамического модуля упругости материала барьера. Наиболее эффективным вариантом является композитная конструкция, состоящая из чередующихся слоев материалов с наибольшим и наименьшим по отношению к окружающему грунту динамическими модулями упругости. Снижение амплитуд колебаний грунта за барьером для данной композитной конструкции достигает 87,7 % при глубине барьера, равной длине волны Рэлея.

The installation of a vertical barrier in the path of surface wave propagation in soil, in the form of an open trench or a trench filled with various materials is considered an effective method of vibration isolation against explosive, seismic, industrial, and transportation-induced vibrational impacts. In this work, based on the finite element method, numerical modeling of dynamic wave propagation in soil with a vertical wave barrier in their path was performed. The soil medium was considered as a spatial elastic inertial array with a specified damping of oscillations according to Rayleigh theory, limited by non-reflective boundaries. The dynamic load was applied in the form of a sinusoid. The change in surface vibration parameters behind the barrier was studied depending on the material of the latter. The calculation results are presented in dimensionless quantities for the geometric parameters of the barrier and its dynamic properties. It has been found that the main parameter of the barrier material determining the effectiveness of vibration isolation is the dynamic modulus of elasticity of the barrier material. Its increase or decrease in relation to the elastic modulus of the soil leads to a reduction in vibrations behind the barrier in the direction of propagation of dynamic waves in the soil. Formulas have been obtained describing the relative reduction of soil vibrations behind the barrier depending on the coefficient of relative reduction in the dynamic modulus of elasticity of the barrier material. The most effective option is a composite structure consisting of alternating layers of materials with the highest and lowest dynamic moduli of elasticity relative to the surrounding soil. The reduction of vibration amplitudes in the soil behind the barrier for this composite structure reaches 87.7 % at a barrier depth equal to the Rayleigh wave length.

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The authors declare that there are no conflicts of interest present.