scholarly journals ACTUAL DESIGN MODEL DEVELOPMENT OF PROTECTIVE SCREEN OVER THE ACTIONS OF SUBWAY LINES

2017 ◽  
Vol 2 (49) ◽  
pp. 99-107
Author(s):  
V. G. Pastushkov ◽  
A. A. Dalidovskaya
Keyword(s):  
Model Development ◽  
Calculation Model ◽  
Design Model ◽  
Practical Significance ◽  
System Construction ◽  
Protective Shield ◽  
Geological Conditions ◽  
Actual Design ◽  
Complex Engineering ◽  
Protective Screen

It is given calculation model development results of protective shield overexisting tunnels of subway in influence zone of transport interchange construction  in the city of Minsk. The analysis of modeling problems of the system «construction - soil massif» is performed. It is proposed the approach to development of an adequate design model for complex engineering-geological conditions. An adequate calculation model of the transport interchange site was developed. The applying modern methods results of calculating the system «construction – soil massif» are given. The stress-strain state nature of the tunnel structures at all stages of the transport interchange construction is analyzed. The results of the calculation are compared with the data obtained during testing of the protective screen in full-scale conditions. The special practical significance of using such calculation methods at the design and construction stage of transport facilities is noted.

Engineering-Geological Studies Of The Territory, Soils Of Foundation And Foundations Of The Architectural Monument Of The "Melnikov’s House" In Moscow

2019 ◽  
pp. 41-51
Keyword(s):  
Working Condition ◽  
Overlying Water ◽  
North East ◽  
The North ◽  
Geological Processes ◽  
Architectural Monument ◽  
Geological Conditions ◽  
Zone Of Influence ◽  
Complex Engineering ◽  
Building Engineering

On the basis of engineering and design surveys of the building, engineering-geological and geophysical studies of the soils of the territory conducted by the article authors, as well as with due regard for the results of studies conducted on this territory by other authors, the features of the foundations, soils of their foundation and engineering-geological conditions of the territory of the Melnikov House are established. It is shown that the Melnikov house is located under complex engineering-geological conditions on the territory of high geological risk, in the zone of influence of tectonic disturbance. To the North of the area there is a zone of intersection of the observed disturbance with a larger disturbance that can have an impact on geological processes. To the North-East of the site of the Melnikov House, a sharp immersion of the roof of carbon deposits was revealed. It promotes groundwater seepage into limestone of the carbonate strata from overlying water-bearing sands and activation of processes of suffusion removal and sinkhole phenomena of the soil. The surveyed area is assessed as potentially karst-hazardous and adjacent to it from the North-East territory as karst-dangerous. In this regard any construction on the adjacent territory can provoke activation of sinkhole phenomena on the surface. The foundations of the building are basically in working condition. Existing defects can be eliminated during repair. The foundation soils mainly have sufficient bearing capacity. Areas of the base with bulk soil can be reinforced. However, when developing a project for the reconstruction of the building and its territory, it should be taken into account that the design of the Melnikov House does not provide for its operation on the loads at the formation of sinkholes.

The use of visualization technologies in the engineering training of vocational education teachers

2021 ◽  
pp. 49-59
Author(s):  
Б.Н. Гузанов ◽  
К.А. Федулова
Keyword(s):  
Vocational Training ◽  
Cognitive Activity ◽  
Educational Process ◽  
Practical Significance ◽  
Educational Technologies ◽  
Professional Activity ◽  
Theoretical Significance ◽  
Visual Frame ◽  
Complex Engineering ◽  
Engineering Training

В статье рассматриваются вопросы повышения эффективности изучения сложных технических дисциплин путем совершенствования образовательных технологий через использование инновационных цифровых средств и ресурсов, основанных на визуализации учебных элементов. Цель статьи — рассмотреть сущность визуализации учебной информации, которая направлена не только на демонстрацию инженерных процессов и систем, но и на активизацию познавательной деятельности обучающихся и стимулирование мотивации к изучению специальных дисциплин будущей профессиональной деятельности. Теоретическая значимость статьи заключается в обосновании необходимости использования цифровых технологий визуализации для обеспечения эффективности изучения сложных инженерных дисциплин. С помощью созданного визуального фрейма работа позволяет обучать на практике будущих педагогов профессионального образования разрабатывать, модифицировать и использовать в дальнейшем компьютерные модели для подготовки инженеров. В статье по-новому на трех уровнях рассматривается сущность визуализации учебных элементов, что важно при использовании данной технологии в образовательном процессе. The article deals with the issues of increasing the efficiency of studying complex technical disciplines by improving educational technologies through the use of innovative digital tools and resources based on the visualization of educational elements. The purpose of the article is to consider the essence of visualization of educational information, which is aimed not only at demonstrating engineering processes and systems but also at activating students’ cognitive activity and motivating them to study special disciplines of future professional activity. The theoretical significance of the article lies in the justification of the necessity of using digital visualization technologies to ensure the effectiveness of studying complex engineering disciplines. The practical significance is presented through the created visual frame, which enables high-quality training of vocational training teachers in the development, modification and further use of computer models for engineering training. The article considers the essence of educational elements visualization in a new way at three levels, which is important when using this technology in the educational process.

ANALYSIS OF PRODUCTION RISK FROM CRUSHES OF ROCKS AT EXCAVATION SITES, TAKING INTO ACCOUNT WAYS OF PROTECTION

2021 ◽  
pp. 124-134
Author(s):  
Iaroslav Liashok ◽  
◽  
Serhii Podkopaiev ◽  
Yuliia Simonova ◽  
Hennadii Boichenko ◽  
...  
Keyword(s):  
Practical Significance ◽  
Production Risk ◽  
Venn Diagrams ◽  
Deep Coal Mine ◽  
Geological Conditions ◽  
Rock Collapse ◽  
Available Information ◽  
Decision Making Model ◽  
Excavation Site ◽  
Industrial Risk

Purpose. To assess the production risk of rock collapse in a deep coal mine to identify hazards in the workplaces of the excavation site, taking into account different methods of protection of workings. Methods. A comprehensive approach was used, which included: analysis and generalization of known research; expert evaluation; use of the basic provisions of probability theory and set algebra (Venn diagrams), the method of estimating the production risk of Fine-Kinney; processing, analysis and interpretation of the obtained results. Results. Problems and sources of industrial risk from rock collapses during maintenance of workings, risk-forming factors that contribute to the threat of dangerous events at the excavation site are analyzed. The decision-making model is considered, which is based on the description of situations when the production risk of the dangerous factor “landslides and collapses” in the maintenance of preparatory workings depends on the result of choosing an alternative method of protection of the retractable lane. For excavation sites under the same mining and geological conditions for all workplaces, the probability of receiving consequences from dangerous events due to uncertain conditions of their implementation has been established. It is fixed that the realization of this production risk is influenced by low reliability and inefficiency of the practiced methods of protection of excavations. Risk analysis is defined as the systematic use of available information to identify hazards in the maintenance of long workings. Novelty. A model for monitoring the production risk of rock collapses in excavations of deep coal mines is proposed, which allows assessing the dynamics of the threat at the stage of technical decisions related to the choice and justification of the method of protection of workings taking into account the interaction of risk factors. Practical significance. When formulating measures to reduce the risk of dangerous events at the excavation site, it is necessary to take into account that the production risk of rock collapse while maintaining the workings depends largely on the method of protection and effectiveness of technological measures.

scholarly journals Determination of pressure in the near-ground space pile terminated and broadening of the surface

2018 ◽  
Vol 251 ◽  
pp. 04062
Author(s):  
Natalia Kupchikova
Keyword(s):  
Numerical Modeling ◽  
Circular Cross Section ◽  
Analytical Form ◽  
Soil Mass ◽  
Software Systems ◽  
Discrete Method ◽  
Building Foundation ◽  
Geological Conditions ◽  
Complex Engineering

The article deals with the problem of determining the stress state of a complex pile structure with end broadening in the form of a sphere in the soil mass in the analytical form by a discrete method. The calculation schemes for determining the stress tensor at the boundary of the pile of square and circular cross-section with expansions in the soil massif are shown. The elements of the polynomial are found by the discrete method in rectangular and spherical coordinates, which is a cumbersome complex mathematical apparatus for a modern design engineer. The stresses are determined. At present, as the analysis has shown, the solution of complex geotechnical problems of soil bases and foundations for different types of loads in numerical modeling is carried out using modern software. Numerical modeling and calculation with the help of specialized software systems allows to consider the system “building-foundation-ground foundation”, as dynamic, integrally developing. However, the interaction of the components of this system requires a theoretical justification of the resistance of foundations in the ground environment, especially in complex engineering-geological conditions.

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