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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="en"><front><journal-meta><journal-id journal-id-type="publisher-id">gscience</journal-id><journal-title-group><journal-title xml:lang="en">Mining Science and Technology (Russia)</journal-title><trans-title-group xml:lang="ru"><trans-title>Горные науки и технологии</trans-title></trans-title-group></journal-title-group><issn pub-type="epub">2500-0632</issn><publisher><publisher-name>The National University of Science and Technology MISiIS (NUST MISIS)</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.17073/2500-0632-2016-1-67-72</article-id><article-id custom-type="elpub" pub-id-type="custom">gscience-20</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="en"><subject>CONSTRUCTION OF MINING ENTERPRISES AND UNDERGROUND SPACE DEVELOPMENT</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="ru"><subject>СТРОИТЕЛЬСТВО ГОРНЫХ ПРЕДПРИЯТИЙ И ОСВОЕНИЕ ПОДЗЕМНОГО ПРОСТРАНСТВА</subject></subj-group></article-categories><title-group><article-title>Evaluation of jet grouting efficiency as means of minimizing of the harmful effect of escalator tunnel construction</article-title><trans-title-group xml:lang="ru"><trans-title>Оценка эффективности струйной цементации грунта как средства снижения вредного влияния проходки эскалаторных тоннелей</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Волохов</surname><given-names>Е. М.</given-names></name><name name-style="western" xml:lang="en"><surname>Volohov</surname><given-names>E. M.</given-names></name></name-alternatives><email xlink:type="simple">volohov@spmi.ru</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Новоженин</surname><given-names>С. Ю.</given-names></name><name name-style="western" xml:lang="en"><surname>Novozhenin</surname><given-names>S. U.</given-names></name></name-alternatives><bio xml:lang="en"><p>assistant lecturer</p></bio><email xlink:type="simple">snovx@mail.ru</email><xref ref-type="aff" rid="aff-1"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>Национальный минерально-сырьевой университет «Горный»</institution><country>Россия</country></aff><aff xml:lang="en"><institution>National mineral resources university (Mining university)</institution><country>Russian Federation</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2016</year></pub-date><pub-date pub-type="epub"><day>13</day><month>05</month><year>2016</year></pub-date><volume>0</volume><issue>1</issue><fpage>67</fpage><lpage>72</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Volohov E.M., Novozhenin S.U., 2016</copyright-statement><copyright-year>2016</copyright-year><copyright-holder xml:lang="ru">Волохов Е.М., Новоженин С.Ю.</copyright-holder><copyright-holder xml:lang="en">Volohov E.M., Novozhenin S.U.</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://mst.misis.ru/jour/article/view/20">https://mst.misis.ru/jour/article/view/20</self-uri><abstract><p>The article describes the escalator tunnel construction using tunnel boring machines in St. Petersburg. To reduce the harmful effects of underground construction on the Earth's surface in the mouth of the tunnel technology is used jet grouting rock mass. Based on the analysis of field data of the earth surface subsidence and rock strata proved the effectiveness of the jet grouting technology. Subsidence of the surface and within the grouting area, are approximately null. The fact that the development of subsidence occurs mainly outside the zone of jet grouting soil is shown. A method of reducing subsidence by grouting additional unstable rocks in the massif, which will reduce the harmful effects of underground construction for an massif and the earth's surface, is offered. To assess the efficiency of the proposed method, a numerical modeling based on the finite element method is carried out. According to the modeling results it is revealed that the proposed method will reduce the subsidence at the surface by 2-3 times.</p></abstract><trans-abstract xml:lang="ru"><p>В статье рассмотрен новый метод строительства эскалаторных тоннелей тоннелепроходческими механизированными комплексами в Санкт-Петербурге. Для снижения вредного влияния подземного строительства на земную поверхность в устьевой части тоннеля применяется технология струйной цементации породного массива. На основе анализа данных натурных наблюдений за сдвижением земной поверхности и породной толщи доказана эффективность применяемой технологии. Оседания, зафиксированные в массиве и на поверхности в пределах грунтоцементного участка, практически нулевые. Показано, что развитие опасных оседаний и деформаций происходит в основном за пределами зоны струйной цементации грунта. Предложен способ снижения этих оседаний за счет дополнительной цементации неустойчивых пород в массиве, которая позволит уменьшить вредное влияние подземного строительства на массив и земную поверхность. Для оценки эффективности предложенного метода проведено численное моделирование на основе метода конечных элементов. Результаты расчетов показывают, что предлагаемая методика позволит снизить оседания на земной поверхности в 2–3 раза.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>сдвижение и деформации</kwd><kwd>эскалаторный тоннель</kwd><kwd>струйная цементация</kwd><kwd>данные натурных наблюдений</kwd><kwd>моделирование</kwd><kwd>МКЭ</kwd></kwd-group><kwd-group xml:lang="en"><kwd>displacements and deformations</kwd><kwd>escalator tunnel</kwd><kwd>jet grouting</kwd><kwd>the data of field observations</kwd><kwd>modeling</kwd><kwd>finite element method</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">Новоженин, С. Ю. 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