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<article 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" xmlns:ali="http://www.niso.org/schemas/ali/1.0/" article-type="research-article" dtd-version="1.2" xml:lang="en"><front><journal-meta><journal-id journal-id-type="publisher-id">Structural Mechanics of Engineering Constructions and Buildings</journal-id><journal-title-group><journal-title xml:lang="en">Structural Mechanics of Engineering Constructions and Buildings</journal-title><trans-title-group xml:lang="ru"><trans-title>Строительная механика инженерных конструкций и сооружений</trans-title></trans-title-group></journal-title-group><issn publication-format="print">1815-5235</issn><issn publication-format="electronic">2587-8700</issn><publisher><publisher-name xml:lang="en">Peoples’ Friendship University of Russia named after Patrice Lumumba (RUDN University)</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="publisher-id">33409</article-id><article-id pub-id-type="doi">10.22363/1815-5235-2022-18-5-428-437</article-id><article-categories><subj-group subj-group-type="toc-heading" xml:lang="en"><subject>Analysis and design of building structures</subject></subj-group><subj-group subj-group-type="toc-heading" xml:lang="ru"><subject>Расчет и проектирование строительных конструкций</subject></subj-group><subj-group subj-group-type="article-type"><subject>Research Article</subject></subj-group></article-categories><title-group><article-title xml:lang="en">Peculiarities of the condition of the foundation slab of the pumped storage power plant water intake</article-title><trans-title-group xml:lang="ru"><trans-title>Особенности состояния фундаментной плиты водоприемника гидроаккумулирующей электростанции</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0003-2761-331X</contrib-id><name-alternatives><name xml:lang="en"><surname>Lisichkin</surname><given-names>Sergey E.</given-names></name><name xml:lang="ru"><surname>Лисичкин</surname><given-names>Сергей Евгеньевич</given-names></name></name-alternatives><bio xml:lang="en"><p>Doctor of Technical Sciences, chief researcher</p></bio><bio xml:lang="ru"><p>доктор технических наук, главный научный сотрудник</p></bio><email>lisichkin1989@rambler.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-5704-4819</contrib-id><name-alternatives><name xml:lang="en"><surname>Kotitsyna</surname><given-names>Sofya S.</given-names></name><name xml:lang="ru"><surname>Котицына</surname><given-names>Софья Сергеевна</given-names></name></name-alternatives><bio xml:lang="en"><p>postgraduate student, senior engineer</p></bio><bio xml:lang="ru"><p>аспирант, старший инженер</p></bio><email>hamilennon@mail.ru</email><xref ref-type="aff" rid="aff1"/></contrib></contrib-group><aff-alternatives id="aff1"><aff><institution xml:lang="en">Branch of JSC “Institute ‘Hydroproject’” - “NIIES”</institution></aff><aff><institution xml:lang="ru">Филиал АО «Институт „Гидропроект“» - «НИИЭС»</institution></aff></aff-alternatives><pub-date date-type="pub" iso-8601-date="2022-12-15" publication-format="electronic"><day>15</day><month>12</month><year>2022</year></pub-date><volume>18</volume><issue>5</issue><issue-title xml:lang="en">VOL 18, NO5 (2022)</issue-title><issue-title xml:lang="ru">ТОМ 18, №5 (2022)</issue-title><fpage>428</fpage><lpage>437</lpage><history><date date-type="received" iso-8601-date="2023-01-29"><day>29</day><month>01</month><year>2023</year></date></history><permissions><copyright-statement xml:lang="en">Copyright ©; 2022, Lisichkin S.E., Kotitsyna S.S.</copyright-statement><copyright-statement xml:lang="ru">Copyright ©; 2022, Лисичкин С.Е., Котицына С.С.</copyright-statement><copyright-year>2022</copyright-year><copyright-holder xml:lang="en">Lisichkin S.E., Kotitsyna S.S.</copyright-holder><copyright-holder xml:lang="ru">Лисичкин С.Е., Котицына С.С.</copyright-holder><ali:free_to_read xmlns:ali="http://www.niso.org/schemas/ali/1.0/"/><license><ali:license_ref xmlns:ali="http://www.niso.org/schemas/ali/1.0/">https://creativecommons.org/licenses/by-nc/4.0</ali:license_ref></license></permissions><self-uri xlink:href="https://journals.rudn.ru/structural-mechanics/article/view/33409">https://journals.rudn.ru/structural-mechanics/article/view/33409</self-uri><abstract xml:lang="en"><p style="text-align: justify;">The authors present the results of the analysis of field observations of the condition of the base slab of the water intake structure of hydroelectric power plant (including the stresses in the reinforcement in the areas of intersection with the vertical joints and the width of the opening of these joints). The aim of the study is to control the condition of the reinforced concrete structure of the foundation slab of the water inlet of the hydroelectric power plant, as well as to develop measures to strengthen the bottom section of the foundation slab in the areas of vertical interblock joints. In order to control the stress and strain of the base plate of the water intake of hydroelectric power plant, string control and measuring equipment was installed: on reinforcement rods - reinforcement dynamometers PSAS, on vertical interblock joints - displacement sensors PLPS. The field observations of the stress state of the reinforcement of the base slab of the water intake structure of hydroelectric power station showed that high values of tensile stresses, exceeding the design resistance of A500C class reinforcement (435 MPa), occurred in the reinforcement rods (directed along the flow), crossing the lower vertical interblock joints. There was also fixed the width of opening of the vertical interblock joint, reaching 1.28 mm. There was a necessity to strengthen the lower section of the foundation slab of the water intake structure of hydroelectric pumped storage power plant. For this purpose, inclined reinforcing bars (anchors) crossing the lower vertical interblock joints were installed. The outlet sections of the buttresses of the slab of the downstream section of the inlet to the downstream parapet were increased.</p></abstract><trans-abstract xml:lang="ru"><p style="text-align: justify;">Представлены результаты анализа данных натурных наблюдений за состоянием фундаментной плиты водоприемника ГАЭС (в том числе за напряжениями в арматуре в зонах пересечения с вертикальными межблочными швами и шириной раскрытия этих швов). Цель исследования заключалась в контроле состояния железобетонной конструкции фундаментной плиты водоприемника гидроаккумулирующей электростанции, а также в разработке мероприятий по усилению низового участка фундаментной плиты в зонах вертикальных межблочных швов. В целях контроля напряженно-деформированного состояния фундаментной плиты водо-приемника ГАЭС установлена струнная контрольно-измерительная аппаратура: на арматурных стержнях - арматурные динамометры ПСАС, на вертикальных межблочных швах - датчики перемещений ПЛПС. Данные натурных наблюдений за напряженным состоянием арматуры фундаментной плиты водоприемника ГАЭС показали, что в арматурных стержнях (направленных вдоль потока), пересекающих низовые вертикальные межблочные швы, возникли высокие значения растягивающих напряжений, превышающие расчетное сопротивление арматуры класса А500С (435 МПа). Также зафиксирована ширина раскрытия вертикального межблочного шва, достигающая 1,28 мм. Возникла необходимость усиления низового участка фундаментной плиты водоприемника ГАЭС. Для этого были установлены наклонные арматурные стержни (анкеры), пересекающие низовые вертикальные межблочные швы. Выполнено наращивание выходных участков контрфорсов перекрытия низового участка водоприемника до низового парапета.</p></trans-abstract><kwd-group xml:lang="en"><kwd>water intakes</kwd><kwd>hydroelectric power plant</kwd><kwd>foundation slab</kwd><kwd>vertical interblock joints</kwd><kwd>stresses</kwd><kwd>reinforcement</kwd><kwd>width of joints opening</kwd><kwd>foundation slab</kwd></kwd-group><kwd-group xml:lang="ru"><kwd>водоприемники ГАЭС</kwd><kwd>фундаментная плита</kwd><kwd>вертикальные межблочные швы</kwd><kwd>напряжения</kwd><kwd>арматура</kwd><kwd>ширина раскрытия швов</kwd><kwd>усиление фундаментной плиты</kwd></kwd-group><funding-group/></article-meta></front><body></body><back><ref-list><ref id="B1"><label>1.</label><citation-alternatives><mixed-citation xml:lang="en">Serebrynikov N.I., Rodionov V.G., Kuleshov A.P., Magruk V.I., Ivanushchenko V.S. Pumped storage power plants. Construction and operation of Zagorskaya Hydroelectric Power Plant. 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