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<article article-type="research-article" dtd-version="1.3" xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xml:lang="ru"><front><journal-meta><journal-id journal-id-type="publisher-id">mgssuvest</journal-id><journal-title-group><journal-title xml:lang="ru">Вестник МГСУ</journal-title><trans-title-group xml:lang="en"><trans-title>Vestnik MGSU</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">1997-0935</issn><issn pub-type="epub">2304-6600</issn><publisher><publisher-name>Moscow State University of Civil Engineering (National Research University) (MGSU)</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.22227/1997-0935.2025.12.1907-1919</article-id><article-id custom-type="elpub" pub-id-type="custom">mgssuvest-814</article-id><article-categories><subj-group subj-group-type="heading"><subject>Research Article</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="ru"><subject>Проектирование и конструирование строительных систем. Строительная механика. Основания и фундаменты, подземные сооружения</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>Construction system design and layout planning. Construction mechanics. Bases and foundations, underground structures</subject></subj-group></article-categories><title-group><article-title>Армирование буроинъекционных свай</article-title><trans-title-group xml:lang="en"><trans-title>Reinforcement of drill-injection piles</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-7120-8744</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Сальный</surname><given-names>И. С.</given-names></name><name name-style="western" xml:lang="en"><surname>Salnyi</surname><given-names>I. S.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Иван Сергеевич Сальный — кандидат технических наук, доцент кафедры строительного производства и геотехники</p><p>625000, г. Тюмень, ул. Володарского, д. 38</p><p>Scopus: 57210175037, ResearchID: JWO-3959-2024</p></bio><bio xml:lang="en"><p>Ivan S. Salnyi — Candidate of Technical Sciences, Associate Professor of the Department of Construction Production and Geotechnics</p><p>38 Volodarsky st., Tyumen, 625000</p><p>Scopus: 57210175037, ResearchID: JWO-3959-2024</p></bio><email xlink:type="simple">salnyjis@tyuiu.ru</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-4356-4717</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Степанов</surname><given-names>М. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Stepanov</surname><given-names>M. A.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Максим Андреевич Степанов — кандидат технических наук, доцент, доцент кафедры строительного производства и геотехники</p><p>625000, г. Тюмень, ул. Володарского, д. 38</p><p>Scopus: 57190858151, ResearchID: ABI-3269-2020</p></bio><bio xml:lang="en"><p>Maksim A. Stepanov — Candidate of Technical Sciences, Associate Professor, Associate Professor of the Department of Construction Production and Geotechnics</p><p>38 Volodarsky st., Tyumen, 625000</p><p> Scopus: 57190858151, ResearchID: ABI-3269-2020</p></bio><email xlink:type="simple">stepanovma@tyuiu.ru</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-3903-0632</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Тарасенко</surname><given-names>А. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Tarasenko</surname><given-names>A. A.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Александр Алексеевич Тарасенко — доктор технических наук, профессор, профессор кафедры транспорта углеводородных ресурсов</p><p>625000, г. Тюмень, ул. Володарского, д. 38</p><p>Scopus: 56490196600, ResearchID: Е-5305-2017</p></bio><bio xml:lang="en"><p>Aleksandr A. Tarasenko — Doctor of Technical Sciences, Professor, Professor of the Department of Transport of Hydrocarbon Resources</p><p>38 Volodarsky st., Tyumen, 625000</p><p> Scopus: 56490196600, ResearchID: Е-5305-2017</p></bio><email xlink:type="simple">tarasenkoaa@tyuiu.ru</email><xref ref-type="aff" rid="aff-2"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>Тюменский индустриальный университет (ТИУ)</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Industrial University of Tyumen (IUT)</institution><country>Russian Federation</country></aff></aff-alternatives><aff-alternatives id="aff-2"><aff xml:lang="ru"><institution>Тюменский индустриальный университет (ТИУ)</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Industrial University of Tyumen (IUT)</institution><country>Russian Federation</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2025</year></pub-date><pub-date pub-type="epub"><day>30</day><month>12</month><year>2025</year></pub-date><volume>20</volume><issue>12</issue><fpage>1907</fpage><lpage>1919</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Сальный И.С., Степанов М.А., Тарасенко А.А., 2025</copyright-statement><copyright-year>2025</copyright-year><copyright-holder xml:lang="ru">Сальный И.С., Степанов М.А., Тарасенко А.А.</copyright-holder><copyright-holder xml:lang="en">Salnyi I.S., Stepanov M.A., Tarasenko A.A.</copyright-holder><license xml:lang="ru" license-type="creative-commons-attribution" xlink:href="https://creativecommons.org/licenses/by/4.0/" xlink:type="simple"><license-p>Данная работа распространяется под лицензией Creative Commons Attribution 4.0.</license-p></license><license xml:lang="en" license-type="creative-commons-attribution" xlink:href="https://creativecommons.org/licenses/by/4.0/" xlink:type="simple"><license-p>This work is licensed under a Creative Commons Attribution 4.0 License.</license-p></license></permissions><self-uri xlink:href="https://www.vestnikmgsu.ru/jour/article/view/814">https://www.vestnikmgsu.ru/jour/article/view/814</self-uri><abstract><sec><title>Введение</title><p>Введение. Рассматривается возможность сокращения длины армирования гибких буроинъекционных свай (БИС) диаметром до 0,3 м без снижения несущей способности по материалу на основе анализа распределения изгибающего момента по длине сваи. Актуальность исследования обусловлена необходимостью поиска технических решений, позволяющих упростить и удешевить процесс усиления фундаментов при сохранении их надежности и долговечности. Основная цель исследования заключается в расчетном обосновании минимально необходимой длины армирования БИС с учетом их реальной работы в грунтовом массиве.</p></sec><sec><title>Материалы и методы</title><p>Материалы и методы. Для достижения поставленной цели производился анализ распределения изгибающего момента по длине сваи диаметром 0,2; 0,25 и 0,3 м в двух типах грунтовых условий. Оценка распределения изгибающего момента выполнялась на основе известных аналитических решений и посредством моделирования в ПК Midas FEA NX. Критерием оценки достаточности армирования служило соотношение между фактическими нагрузками и предельной прочностью бетона на растяжение, что позволило оценить реальную необходимость армирования на различных участках сваи.</p></sec><sec><title>Результаты</title><p>Результаты. Анализ распределения изгибающего момента для выбранных грунтовых условий по длине гибких свай показал, что наибольшие усилия возникают только в верхней части до глубины 3–4 м, далее происходит резкое затухание изгибающего момента. Установлено, что в условиях распространения пылевато-глинистых грунтов для гибких свай диаметром до 0,3 м достаточная глубина армирования составляет 15–16 диаметров сваи.</p></sec><sec><title>Выводы</title><p>Выводы. Продемонстрирована принципиальная возможность сокращения длины арматурных каркасов гибких БИС диаметром до 0,3 м без снижения их несущей способности. Получены рекомендации по глубине армирования в зависимости от диаметра сваи и характеристик грунтового основания. Данные результаты дают возможность упростить процесс устройства БИС малого диаметра, особенно при работе в стесненных условиях.</p></sec></abstract><trans-abstract xml:lang="en"><sec><title>Introduction</title><p>Introduction. The paper presents the possibility of reducing the reinforcement length of flexible drill-injection piles with diameters up to 0.3 m without compromising their material bearing capacity, based on an analysis of bending moment distribution along the pile length. The relevance of the study stems from the need to find technical solutions that simplify and reduce the cost of foundation reinforcement while maintaining reliability and durability. The main objective is to provide a computational justification for the minimum required reinforcement length of drill-injection piles, considering their actual behavior in soil mass.</p></sec><sec><title>Materials and methods</title><p>Materials and methods. To achieve this goal, the distribution of bending moments was analyzed for piles with diameters of 0.2, 0.25, and 0.3 m in two types of soil conditions. The assessment was performed using known analytical solutions and numerical modelling in Midas FEA NX software. The sufficiency of reinforcement was evaluated based on the ratio between actual loads and the ultimate tensile strength of concrete, allowing determination of necessary reinforcement zones along the pile length.</p></sec><sec><title>Results</title><p>Results. The analysis of bending moment distribution in flexible piles showed that maximum stresses occur only in the upper section (up to 3–4 m depth), with rapid attenuation of bending moments below this level. For silty-clay soils, the sufficient reinforcement depth for flexible piles up to 0.3 m diameter was established as 15–16 pile diameters.</p></sec><sec><title>Conclusions</title><p>Conclusions. The study demonstrates the fundamental possibility of reducing reinforcement cage length in flexible drill-injection piles (up to 0.3 m diameter) without compromising bearing capacity. Practical recommendations for reinforcement depth depending on pile diameter and soil characteristics were developed. The results facilitate the installation of small-diameter drill-injection piles, particularly in confined working conditions.</p></sec></trans-abstract><kwd-group xml:lang="ru"><kwd>буроинъекционная свая</kwd><kwd>несущая способность</kwd><kwd>длинные гибкие сваи</kwd><kwd>глубина армирования</kwd><kwd>стесненные условия</kwd><kwd>точки обрыва арматуры</kwd><kwd>изгибающий момент</kwd></kwd-group><kwd-group xml:lang="en"><kwd>drill-injection pile</kwd><kwd>bearing capacity</kwd><kwd>long flexible piles</kwd><kwd>reinforcement depth</kwd><kwd>confined conditions</kwd><kwd>reinforcement cutoff points</kwd><kwd>bending moment</kwd></kwd-group></article-meta></front><back><ref-list><title>References</title><ref id="cit1"><label>1</label><citation-alternatives><mixed-citation xml:lang="ru">Salnyi I.S., Pronozin Y.A., Naumkina J.V., Karaulov A.M. 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