Stress-Strain State of Concrete in the Walls of Lock Chambersof the Moscow Channel

Levachev, S. N.; Fedorova, T.

doi:10.22227/1997-0935.2013.8.137-149

Cited by 3 publications

(3 citation statements)

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“…For instance, inв 1997-2007, on the eastern and western walls of Moscow Canal lock #2, exposed concrete replacement was carried out using the 'column' technique. The surface concrete layer of the face side was replaced to the depth of 30 to 50 cm [1]. Ground-penetrating radar survey of lock #13 chamber in Gorodetsky District Waterworks showed the depth of zones with compromised structure of exposed concrete reaching 2 to 60 cm and in some areas -down to 3.0 m from the wall surface, i.e.…”

Section: Introductionmentioning

confidence: 99%

Application of environmentally friendly concrete demolition techniques in the repair of shipping locks

Bazanov

2019

E3S Web Conf.

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The paper analyzes the traditional mechanic technique of concrete demolition and the promising hydro demolition techniques from viewpoint of waterworks operators. The mechanical concrete demolition technique using chisel hammers is immediately available for the use and relatively cheap, but it is associated with considerable labor cost, generation of dust and noise. Concrete hydro demolition technique using high-pressure water has much higher productivity and reduces repair completion time, does not damage reinforcement, and ensures good adhesion of new concrete to old concrete. Basic technical characteristics of hydro demolition equipment and its pricing are given. On the basis of the current situation with regard to the estimated regulation and financing of construction projects, including from budgetary funds, the author considered the possibility of using promising methods of removing exposed concrete of lock chamber walls. A comparison was made between the cost and the regulatory and actual labor intensity between the methods of mechanical and hydraulic destruction of concrete. It has been shown that application of the hydraulic demolition technique is constrained by financial capabilities and estimates regulatory requirements. For substantiation of using the concrete hydro demolition techniques, operators need to adjust the regulatory framework for federal assessments.

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Section: Introductionmentioning

confidence: 99%

Application of environmentally friendly concrete demolition techniques in the repair of shipping locks

Bazanov

2019

E3S Web Conf.

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“…The relevance of pre-design inspections of hydraulic structures is the need to assess the characteristics of the technical and operating state of the structure, to describe the reasons for deviations from the design parameters of operation, to obtain recommendations to justify the design of reconstruction or restoration of structures. The relevance of the topic of study of the state of hydraulic structures of a long-term service life is reflected in many papers [1][2][3][4][5][6][7][8][9][10][11]. The main focus of the papers is the assessment of the technical state and level of safety, durability of hydraulic structures with a long-term service life [1][2][3][4].…”

Section: Introductionmentioning

confidence: 99%

“…The main focus of the papers is the assessment of the technical state and level of safety, durability of hydraulic structures with a long-term service life [1][2][3][4]. In many papers [1][2][3][4][5][6][7][8][9][10][11] modern technologies and new materials for the repair and reconstruction of hydraulic structures are considered. In the paper [1][2][3][4] the requirements for the technology of reconstruction of structures, which allow not to suspend the full operation of hydraulic structures, are noted.…”

Section: Introductionmentioning

confidence: 99%

Pre-design inspection of the long-term operation lock

Frishter

Isaikin²

2019

E3S Web Conf.

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For hydraulic structures of long-term operation, assessments of operating life, limit states and safety of structures are required. The design of reconstruction, restoration of functional parameters of structures is preceded by pre-design inspections of the structure. The relevance of pre-design inspections is the need to assess the characteristics of technical and operating state of the structure, to describe reasons for deviations from design parameters of operation, to obtain recommendations to justify the design of reconstruction, restoration or repair of structures. This article presents the results of a pre-design inspection of a high-pressure lock on the Ufa River. An analysis of the complex of effects on the stress-strain state of the structure, static calculation of the lock chamber wall is carried out considering design changes during the operation period – installation of additional buttresses, vibrodynamic inspection and calculation. The obtained calculation results are compared with data of instrumentation equipment. The purpose of the inspection is to obtain a preliminary design assessment of technical state of the hydraulic structure – lock, including an assessment of the possibility of further operation. The practical significance of the paper is determined by the fact that the results obtained can serve as baseline data for a design of reconstruction, restoration of a hydraulic structure and recommendations for ensuring its long-term safe operation.

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The features of stress-deformation state of the lock chamber walls

Rubin¹,

Lisichkin

Nikolaev

et al. 2019

Vestnik MGSU

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А ННОТА Ц И Я Введение. Железобетонные стены шлюзовых сооружений являются ответственными конструкциями, так как снижение их уровня безопасности в процессе длительной эксплуатации может привести к негативным последствиям. Характерные особенности таких конструкций обусловливают их напряженно-деформированное состояние (НДС) и несущую способность. Неотъемлемую часть конструкций стен камер шлюзов составляют межблочные строительные швы (как горизонтальной, так и вертикальной ориентации), наличие которых учитывается нормативными и нормативно-методическими документами, действующими в последние десятилетия. Материалы и методы. Применены аналитические методы анализа результатов наблюдений за НДС массивных железобетонных конструкций стен камер шлюзов, а также методик расчета и нормативных документов. Результаты. Проведен анализ состояния ряда камер шлюзов отечественных объектов, таких как канал им. Москвы, ГЭС Кашхатау; Павловский шлюз и др. Отмечен особый характер трещинообразования и НДС, что потребовало проведения неотложных мероприятий по их усилению и ремонту. Выполнен анализ положений нормативных документов, действовавших в период проектирования большинства таких сооружений, и действующих в настоящее время. Выводы. Выявлено несовершенство нормативных документов, действовавших в период проектирования большинства стен камер шлюзов, в результате чего в целом ряде случаев возникло непроектное состояние. Обоснована необходимость совершенствования методики расчета железобетонных конструкций стен камер шлюзов, а также положений действующих нормативных документов.

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Stress-Strain State of Concrete in the Walls of Lock Chambersof the Moscow Channel

Cited by 3 publications

References 0 publications

Application of environmentally friendly concrete demolition techniques in the repair of shipping locks

Application of environmentally friendly concrete demolition techniques in the repair of shipping locks

Pre-design inspection of the long-term operation lock

The features of stress-deformation state of the lock chamber walls

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