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  • Problems of increasing energy efficiency of the construction industry in the Russian Federation

    The article describes the main problems of implementation of energy-efficient technologies in the construction sector. The key parameters affecting the energy efficiency of the building, ways to minimize energy losses.

    Keywords: Increase of energy efficiency of buildings, minimization of energy losses, energy efficiency class of the building, economical consumption of energy resources

  • Studies of dustiness in a residential area located near industrial enterprises with PM10 and PM2.5 particles

    When organizing work on the territory of sanitary protection zones, it is necessary to take into account that the SPZ is already a territory with elevated levels of exposure, which may require the use of additional means of individual and collective protection. Meteorological parameters are important factors affecting the extent of the impact of the work on human health. The article presents a comparative analysis of the concentration of suspended substances in the workplace, depending on meteorological parameters.

    Keywords: sanitary protection zone, hazard class, industrial enterprise, construction, reconstruction, ecology, atmosphere, labor protection, non-stationary workplace

  • Stugy of electrical properties of clay aluminum silicates by the methods of electrical measurements

    Existing methods for assessing the plasticity of soils are labour-intensive, and yield the results of low quality. Due to the importance of this parameter for determining the strength of road beds when designing the construction of railways and highways, the development of new efficient methods for its reliable determination is of great importance. In this paper, we propose a method for solving this problem based on the correlation of mechanical and electrical properties of cohesive soils by the example of soil-forming minerals of montmorillonite and kaolinite

    Keywords: layered aluminum silicates, soil plasticity, plastic and liquid limits, absorption, swelling, electrical measurements, correlation of mechanical and electrical properties

  • Approximate method of calculating beams with corrugated wall

    The article discusses the method for calculating beams with corrugated walls as three-layer structures of equivalent rigidity. The derivation of resolving equations for a one-dimensional finite element of a three-layer beam is given. A hypothesis is introduced that the shelves fully perceive normal stresses, and the wall only works on shear. When obtaining the basic equations, forced deformations are taken into account, which may include creep deformations, temperature deformations, shrinkage deformations, etc. The solution of the test problem for a beam hinged at the ends under the action of a load uniformly distributed over the length is presented. To control the reliability of the results, a finite element analysis was performed in a three-dimensional formulation in the LIRA software package. Shelves of the beam are modeled by flat triangular shell finite elements, and the wall is modeled by rectangular shell FE.

    Keywords: corrugated wall beam, three-layer beam, finite element method, equivalent rigidity, stress-strain state

  • The method of calculating the oval placeholder element three-layer design

    This article presents the basic assumptions and calculation scheme, allowing to obtain an approximate method of calculation of the filler of three-layer structures with a sufficiently large deformability, ie structures, deflections which are comparable to the thickness of the three-layer package as a whole.

    Keywords: deformability, load, filler, load, energy, energy-absorbing element, hinge, travel speed, layer, elasticity

  • Example of calculation of an oval element of a three-layer construction filler

    In this article, we propose a method for determining the reactive load for an element of the oval rod type with a rectangular or square cross-section, in which the diagrams of the moments of external forces and single loads are rectilinear. In this case, integration can be performed analytically

    Keywords: energy-absorbing element, plot, rod, filler, load, beam, hinge, travel speed, layer

  • Simulation of the design activity diversification of innovative enterprise

    This article discusses the relevance of technogenic landscapes recultivation near large cities (megalopolises) and its metropolitan area as a tool for development of functional city territory reserves. On the basis of world experience, the author reveals aspects that are solved by construction recultivation. The paper overviews the basic methods and solutions of quarries and excavations revitalization.

    Keywords: reclamation of technogenic landscape, revitalization, anthropogenic landscape

  • Project management of implementation of technology of information modeling on the construction industry

    The article discusses the scientific and practical aspects of the process of implementation of BIM-technology in the construction industry. The analysis of risks of implementation of information modeling technology based on the experience of Russian companies, ways to reduce it, formulated the main provisions and advantages of the introduction of BIM-technologies using the methodology of project management.

    Keywords: project management, BIM-technology, risk, information modeling, project team, project life cycle

  • Technology LSTK and its features

    Light steel thin-walled structures are considered as elements of modern building erection technology. Domestic and foreign regulatory documents governing the use and design of structures made of thin-walled steel profiles are presented, and obvious advantages and operational disadvantages are indicated.

    Keywords: construction, metal structures, light steel thin-walled structures, thin-walled beams, energy efficiency

  • Analysis of hardening projects of soil foundations in the construction of buildings of educational institutions in the Rostov region

    The analysis of the projects for securing the soil foundations, which are part of the new construction projects of educational institutions in the Rostov region in 2016-18, is carried out. On the example of the construction of schools in the cities of Rostov-on-Don, Taganrog, Shakhty, Novocherkassk, Aksai and the village of Chaltyr, the main technical and technological solutions for soil consolidation are considered, depending on the engineering and geological conditions of the construction sites

    Keywords: cementation, injector, soil, consolidation, foundation, soil piles, retaining walls, sediment, subsidence, deformation

  • On improving the efficiency of dust collection systems in the production of building materials

    The article describes solutions aimed at improving the efficiency of dust collection systems with vortex inertial devices on the opposite swirling flows. The proposed design solutions are designed for the production of various building materials.

    Keywords: vortex inertial dust collector with counter-swirling flows (VZP), suction from the bunker, mixed-flow flows

  • Climatic features of St. Petersburg in assessing the content of suspended substances in atmospheric air

    The article discusses the features of the climatic conditions of St. Petersburg, affecting the formation of the ecological situation in the city, including the content of fine dust particles in the atmospheric air.

    Keywords: fine dust, temperature, relative humidity, wind speed, wind rose, air pollution

  • On the results of research on the basic properties of dust in the production of ceramic bricks

    Data on disperse composition of the dust which is formed in the course of drying of a semi-finished product of a ceramic brick in the dryer drum are provided. The data necessary for the choice of effective systems of cleaning of emissions at this stage of production are also obtained

    Keywords: production of a ceramic brick, drying of a semi-finished product, microscopic analysis, fractional structure, bulk density, corners of a natural slope

  • On the study of the aerodynamic characteristics of the dust emitted during the of prepacking chemicals

    The article describes the study of fine dust at the stage of packing and packaging of particulate material. Attention is given to fine particles, which is PM10 and PM 2.5, that have a negative impact on human health in the process of packaging chemicals.The object of the study is the sodium salt of naphthalene-2-sulfonic acid, which is the starting crude in the chemical industry and organic synthesis.As a result of the sedimentation analysis, the sizes of the particles deposited in the experimental setup were determined and, based on the data obtained, the particle size of dust was formulated depending on the settling time.The results obtained are used in the engineering of aspiration systems in industrial plants.

    Keywords: fine particles, chemical dust, sedimentometry, PM10, PM2.5, particle size distribution, naphthalene-2-sulfonic acid sodium salt

  • Simulation of the design activity diversification of innovative enterprise

    In recent years, competition has increased among leading universities for leadership. The competition affects the architectural environment of the university campus. So what trends have helped to shape university campuses in recent years? 1.Starchitecture. Contemporary Campus Design(2018), universities continue to be drawn by the allure of the world-renowned architects known as the “starchitects”. 2. Adaptive reuse– a model that, according to its advocates, can be more environmentally friendly and cost-effective and is far more sensitive to the local landscape. 3. Sustainability. Sustainable development consists of balancing local and global efforts to meet basic human needs without destroying or degrading the natural environment. “The greenest building is the one that’s already built”, but a desire to build sustainably is still a huge influence on the creation of new university structures. 4. Shared use. One way to address the underuse of university buildings is by sharing them with other organisations. This can help to save money and reduce the university’s carbon footprint. 5. Informal, flexible learning spaces. The shift away from lecture theatres is a definite trend. Online learning is transforming the spaces that universities are building. There is noting a rise in student demand for “hub buildings”, which “comprise informal learning spaces, social spaces, IT facilities, dining areas and counselling [services]” 6. The allure of the city- a city centre location looks increasingly desirable to universities intent on satisfying the demands of students. According to the authors of the article, the use of the above principles in the design of campuses will increase their competitiveness.

    Keywords: educational campus, educational space, adaptive use, reuse, ecological rationality, innovation, modern architecture, restoration, multipurpose space, city

  • Experience of application of the 8D method in the production of building materials

    The poor quality of construction products is one of the main problems of the construction industry. A defect may occur at any stage of the product life cycle. The reputation of a company and its place in the market depends on how the company has established the process of management of non-conforming products and a dialogue with the consumer. In this article the method of management of quality "8D" which is capable to reveal not only the reasons of failures, but also to prevent their emergence further is considered, that is realizes one of the principles of quality management – continuous improvement.

    Keywords: technique, quality, consumer, improvement, failure, defect, enterprise, products, ISO, group, principle, construction, metal, fencing

  • Selection of an environmentally efficient air pollution abatement system for a clay and sand transfer unit at brick factories

    In the article, the groups of parameters of the properties of dust aerosol released into the air pool at the clay and sand transshipment sites of the construction industry, in particular at brick factories, are investigated. The main type of pollutant in the article is considered inorganic dust containing 70-20% silica. The properties of a dust aerosol are presented from the standpoint of the theory of stability of dispersed systems. The main classification feature in the distribution of the parameters of the properties of the groups selected physical nature of the processes and phenomena observed in the dust aerosol. As a result of the construction of a physical model of the process of air pollution, a detailed analysis of the objects involved in the pollution process was conducted.

    Keywords: Atmospheric air, pollutant, overload unit, dust aerosol, parameters of dust aerosol properties, pollution reduction system

  • Floor heating system for residential and industrial premises

    In this article the scheme solution of a heating system by a floor with use of the heat exchanger-supercharger is offered and comparative results of research of a heat transfer coefficient of a surface of heat exchange of the offered system of heating of a floor with traditional are resulted. As a result of the study, the parameters characterizing the operation of the floor heating system were determined. With the established mode of operation of the floor heating system, the heat transfer coefficient of the heat exchange surface is 15% higher than with the traditional one.enterprise.

    Keywords: Underfloor heating, heating, coolant, shock unit, temperature, hydraulic shock, pipeline, air, heat exchanger-blower, pump, leakage

  • Simulation of wave processes in a wall structure with a defect in the form of a crack

    The problem of identification of defects in the construction in the form of a wall element is considered. Numerical simulation of the structure is carried out in the Ansys finite element complex. The investigated model of a wall structure has a defect in the form of a through crack, of a certain length. The edges of the cracks do not interact with each other. The excitation of the structure under pulsed loading is considered. Wave field displacements at control points are analyzed. Identified signs of identification of crack-like defect.

    Keywords: numerical modeling, wall element, defect, crack, identification, finite element modeling, dynamic analysis, oscillations, displacement wave field

  • Investigation of oscillations of a wall structure model with pulsed excitation

    The problem of identification of defects in the construction in the form of a wall element is considered. Numerical simulation of the structure is carried out in the Ansys finite element complex. The investigated model of a wall structure has a defect in the form of a through crack, of a certain length. The edges of the cracks do not interact with each other. The excitation of the structure under pulsed loading is considered. Wave field displacements at control points are analyzed. Identified signs of identification of crack-like defect.

    Keywords: numerical modeling, wall element, defect, crack, identification, finite element modeling, dynamic analysis, oscillations, displacement wave field

  • Stages of formation of the embankment and descents of the city of Rostov-on-Don

    The work is devoted to the stages of the formation of the city embankment. Its evolution from the port-trading and warehouse zone to the recreational. The continuity of the idea of "turning face to the river" of the city passing from project to project before World War II and after, which was realized only in the late 40s. The evolution of the descents to the embankment, originally created for trade needs, later became recreational zones, completed with monumental stairs.

    Keywords: descent, architecture, project, city plan, VN Semenov, Ya. A. Rebain, implementation, restoration, bridge, project

  • Improvement of the project of works taking into account factors of resource and energy saving

    The article shows that when solving the problem of optimization of the project of construction works it is necessary to take into account the factors of energy and resource saving. An assessment of the importance of the criteria for energy and resource saving measures at the design stage of the construction organization project is given. The use of matrices of paired comparisons allows you to perform the optimal search for energy-saving measures, which will lead to the selection of effective organizational and technological solutions at the stage of development of the project of works.

    Keywords: project of construction works, optimization, resource saving, energy saving measures, matrix of paired comparisons, ranking, vector of priorities