bluuebunny/crossref_metadata_2025_split huggingface dataset:
Methodology for a comprehensive analysis of the construction projects’ accidents causes at various stages of their life cycle
Authors: Sheina S G , Girya L V , Vinogradova E V , Sobolevskiy A 
Published: September 2020

Abstract
Today, accidents at capital construction facilities are encountered at various stages of the buildings’ life cycle, which is associated with errors in the design and construction as well as the rules violation for the buildings’ operation. Now there is no unified system of accounting and technical analysis of the causes in the current situation, therefore, it is necessary to pay attention to monitoring and methods of construction sites accidents causes’ complex diagnosis. The scientific research is devoted to the methodological foundations’ development for a comprehensive analysis of the accidents on the construction sites and the development of organizational and technological measures to reduce the probabilityof their occurrence. The main objective of the scientific article is to consider the causes of the accident at various stages of the building’s life cycle. The article discusses the building life cycle stages and the causes of accidents from the pre-design stage to the capital construction object’s demolition. The buildings and structures’ collapse statistics and their causes are analyzed. An algorithm for analyzing the accidents causes throughout their operation life is proposed. The importance of the capital construction facilities accidents’ monitoring and analysis stage, the improving methods for their diagnosis and warning to prevent the emergency situations recurrence is proved. A set of organizational and technological measures for the capital construction objects accidents’ prevention throughout their operation life is proposed.
Investigation of the protective airtight shell’s operational reliability at the construction stage
Authors: Gubeladze O A , Gubeladze A R , Kirilchik L F 
Published: September 2020

Abstract
The actual values of the sealed enclosure internal parameters differ from the design results, in addition, the existing calculation models do not take into account the complex distribution of prestressed reinforcement, as well as the ropes’ behavior of the prestressing system. The article discusses the issues of developing an instrumental survey program to eliminate uncertainty in assessing the technical condition of a power generating unit.
Quick method of the grunt prisms gravity centers’ exact compliance with vertical area planning
Authors: Sekisov A , Danilenko S , Klimenko V , Stepanov R 
Published: September 2020

Abstract
The article discusses the methods for improving the accuracy of calculating the soil movement distances along the vertical layout of areas, which is one of the first works for leveling the construction site surface [3, 5, 6, 14]. This work is usually performed using the earth-moving machines [12, 17, 19, 20]. Norms of time for their work are given in Unified Standards and Prices E2-1 [13] with gradation of the soil movement distances of 100 and 10 m. When vertical planning is required on the large areas with the soil movement over the distances of several hundred meters and with large working elevations, the options for using faster motor vehicles are possible [1, 2, 10, 11]. However, not all standards indicate between which points and how to set these distances. We believe that it is advisable to install them using the positions of the soil bodies’ gravity centers instead of the commonly used the centers’ positions of their areas [9, 18]. This will increase the reliability level of the soil movement distance to establish the appropriate costs of computer time [7, 8]. The formulas for determining the positions of the gravity centers of bodies (BGC) are given in the reference book [9] and in other sources.
The installation features of the industrial building spatial lattice metal coating in a confined space
Authors: Alpatov V Yu , Petrov S M 
Published: September 2020

Abstract
When developing a project for the industrial building spatial coverage installation, a number of tasks were solved to improve the installation method. The project’s feature was the presence of the constrained working conditions. The technology of mounting the coating blocks has been proposed. Mounting schemes with a breakdown of the spatial coverage of the building into the separate mounting blocks, followed by the enlargement assembly at the mounting mark have been developed. The use of inventory mounting devices in combination with a traverse of individual manufacture is justified. Mounting the unit using a traverse allowed to reduce the estimated height of the hook and pick up a crane with a relatively small rent cost. It became possible to apply the adopted installation scheme provided that an individual design of the beam was developed. The calculation and design of the traverse itself was performed, as well as the calculation of the enlarged unit for the installation situation.
A promising system of geodetic and coordinate ensuring for transport construction
Authors: Zheleznov M M 
Published: September 2020

AbstractIncreasing the requirements for the quality and timing of transport construction, as well as ensuring the quality of the work carried out, requires the unified approaches to the information-control systems’ creation for coordinate support of construction and extended objects’ geometric parameters monitoring over a large territory with high accuracy. The article presents the development evolution of the transport construction technologies with the conclusions concerning the need for the integrated application of satellite navigation and remote sensing methods. The concept of building a four-level high-precision system of geodetic and coordinate support for the long transport facilities railway transport construction is presented. The presented monitoring system will ensure the compliance with the necessary requirements for the constructed objects’ accuracy in a single coordinate system.
Design organization and construction implementation of the installation and reconstruction technology using helicopters
Authors: Balakchina O , Shalenny V 
Published: September 2020

Abstract
The article analyzes the helicopters’ rational flight operation issue state in the reconstruction projects’ design and implementation to replace the cover structures of single-story industrial buildings. The practical use experience of helicopters in the conditions of an existing industrial enterprise is summarized. The basic prerequisites for the use of helicopters for the structures’ dismantling and installation are described. The joint development issues of the reconstruction projects using helicopters are considered, taking into account technological and organizational aspects. The structure and relationship of the technological process organization individual elements. A scheme for organizing and implementing a rational technology for mounting and dismounting using a helicopter, professionally trained flight crews, teams of ground installers to perform mounting and dismantling work during the industrial facilities reconstruction has been developed. The possible ways of expanding the operational range when using helicopters for installation and dismantling work are shown.
About designing the internal layout grid of the main NPP building
Authors: Bryn M Ya , Lobanova Yu V , Nikitchin A A 
Published: September 2020

Abstract
When carrying out the construction and installation works of nuclear power facilities, one of the main stages of geodetic work at a construction site is the creation of a layout grid. The article considers the issue of designing an internal layout grid at the source and installation horizons. It is proposed to use the free stationing method when creating the internal layout grid. A model of the internal circuit in the reactor building was created and accuracy pre-calculation was performed.
Verification of the ventilation dampers’ aerodynamic characteristics
Authors: Skorik T , Galkina N , Glazunova E 
Published: September 2020

Abstract
Engineering solutions of air conditioning systems require the operation analysis and the aerodynamic characteristics verification of the ventilation dampers installed on ventilation, air heating, air conditioning, supply and exhaust smoke ventilation systems to prevent air overflow and combustion products from one room to another, as the dampers’ characteristics affect the systems’ technological reliability and energy efficiency as a whole. Thus, the leakage through the closed dampers leads to a decrease in the useful work of the ventilation unit, characterized by the efficiency coefficient, which is due to the mismatch between the actual and the calculated performance of the ventilation systems. This removes the fan operation from the optimal area. The non-tightness reasons of the ventilation dampers for various purposes were analyzed. To reveal these reasons, the experiments were carried at a laboratory-industrial stand. The use of modern computer programs for processing the experimental data made it possible to build the mathematical models providing the necessary conditions for the adequacy and reliability of the ventilation dampers’ studies. A visual description of the digitized three-dimensional flow in the investigated ventilation damper is given. This description can be used in the future to accurately assess the characteristics of ventilation dampers affecting the ventilation systems’ technological reliability and energy efficiency.
Water supply of the population in the cyanobacteria mass development conditions at the Volga reservoirs
Authors: Selezneva A V , Seleznev V A , Bespalova K V , Sayriddinov S Sh 
Published: September 2020

Abstract
The results of the monitoring data analysis of the Kuibyshev reservoir as a source of drinking water supply for the period 2000-2018 are presented. The observations were carried out monthly in the water area and in the closing section of the reservoir, located in the Zhigulevsky dam area. The estimation of temporal variability and spatial heterogeneity of the reservoir water quality is given. It was established that in the summer, during the period of cyanobacteria mass development, biological pollution of the reservoir is observed, the water quality deteriorates by smell, color, pH, and dissolved oxygen content. The content of dissolved organic and toxic substances increases, and the concentration of nutrients, on the contrary, decreases. With a limited concentration of phosphates in the water of the reservoir, the cyanobacteria mass development process stops. In the period of water quality deterioration in the source of water supply in large Volga cities, the problems in the purification of natural water to the requirements of drinking water supply for the population arise. To solve the problem, the recommendations to improve the technological scheme of purification of the Volga water from organic and toxic substances were developed. Organic pollution can be reduced using ozone or activated carbon. Membrane technologies being capable of filtering water and cyanobacterial cells without mechanical damage can serve as a barrier against toxic substances entering drinking water.
Experimental-theoretical substantiation of the previously formed sediment’s application as the water clarification process intensifier
Authors: Shishova O P , Schutskaya E E , Smolyanichenko A S 
Published: September 2020

Abstract
An attempt was made to experimentally and theoretically substantiate the use of the previously formed sediment for clarifying water. The water-pipe sediment contains a large amount of aluminum sulfate, which, when introduced into water, promotes hydrolysis, sorption, and adhesion. When the recommended doses of spent sediment are introduced into water before entering the sedimentation tanks, the suspension is destabilized, most of it falls into the sediment, and the remaining destabilized part is exposed to the coagulant introduced sometime after the sediment is introduced, which contributes to the renewal of the suspension activity in the sorption and adhesion phenomena. In addition, the sediment recycling process can be considered as sorption. The electro kinetic potential is in the range of 15-20 mV using the sediment recirculation method.
Reconstruction of urban sewage treatment facilities at the Manfukh site of Riyadh - Saudi Arabia
Authors: Litvinenko V A , Wilson E V , Zubov M G , Lanovoy A S 
Published: September 2020

Abstract
The article provides the information on all stages of the large facilities’ reconstruction project for domestic wastewater - from the stage of preparing an application for participation in the tender, to the direct implementation of the decisions made. The main conditions presented by the customer, current operating problems before reconstruction, solutions for the treatment facilities’ modernization in accordance with the reconstruction project, as well as the results are indicated.
Biogas technologies in the heat and gas supply systems for the agricultural organizations in the Saratov region
Authors: Spiridonova E V , Naumova O V , Tyurina N S , Mavzovin V S 
Published: September 2020

Abstract
One of the advantages of using biogas plants is the biogas production to generate thermal energy. The useful consumption of generated energy depends on the biogas plant’s thermal protection optimization level. The purpose of the study is to search for technical solutions and justification of optimal parameters for increasing the energy efficiency of a biogas plant used in the thermal energy generation to create a favorable microclimate in livestock buildings. The design and technological features of a biogas plant depend on the process stages, the shape of the reactor, and the types of mixing. The criteria for energy efficiency are the lowest cost of energy consumed by a biogas plant for its own needs. A comparison of the insulating materials’ energy indicators made it possible to establish that cellulose wool and polystyrene foam have the lowest heat transfer coefficients.
Prospects for the solar energy development in housing construction: an assessment of economic efficiency
Authors: Sekisov A N , Ovchinnikova S V , Norenko M S , Matevosyan V S 
Published: September 2020

Abstract
Currently, around the world there is an acute question of the new energy sources’ development and implementation. It is known that the most significant of them today are oil, natural gas, coal, electricity. Oil and gas reserves are not unlimited. It is necessary to look for the alternative sources of energy [4, 5, 6, 14]. This is due not only to a shortage of basic energy resources, but to the increasing cost of their extraction and processing, as well as to an aggravation of the environmental situation in the world [1]. In search of the new sources of energy, people are increasingly turning to solar panels. This is an excellent replacement for the generators of various types, some of which may be slightly functional or potentially dangerous for a private house. The solar energy has been known for a long time, it is a subject of debate and discussion among the specialists. Some people think that this is a great prospect for the future, others are sure of the opposite, since on the one hand, solar panels do not require expenses for their operation, but the cost of this equipment is high. Some experts claim that the profit from this project will not be able to cover the costs associated with construction. In contrast, these devices can work for tens and hundreds of years, therefore, with long-term operation, the profit will be obvious [4, 5, 6, 11, 14].
The algorithm for ensuring the parts’ (assembly nodes, machines) reliability based on the theory of risk
Authors: Kasyanov V E , Korotky A A , Egelskaya E V , Kosenko E E 
Published: September 2020

Abstract
currently existing technical systems are created for a certain service life with a limited number of work cycles and are out of order after some time. At the same time, there are such failures that cause life loss, damage at various levels. Therefore, there is a need to use the “risk” concept of an adverse event (excluding damage). The considered risk exceeds the failure probability by the safety factor value. The article presents an algorithm for ensuring the reliability of the parts associated with negative consequences, based on the risk theory, which considers the patterns (Figure 8 - Figure 10), due to six scientific principles.
The transition from the sample data to the total aggregate of the final volume and the analysis of this transition laws
Authors: Teplyakova S V , Kotesova A A , Popov S I , Kotesov A A 
Published: September 2020

Abstract
One of the most important features in science and practice for ensuring the machines and their components’ reliability is the use one of the mathematics’ areas - theory of probability and mathematical statistics. Most textbooks on the theory of probability and mathematical statistics deal with infinitely large aggregates. Since even the sample’s representativeness does not allow fully describing the entire aggregate, this should be taken into account at the stage of calculation and design. These facts led to the need for the transition from the sample data to the general aggregate data of the final volume. For this transition, we used the graphical method, which allows going from the sample, for example, with a volume of n=10-100, to the general aggregate Nc=103-106 using the extrapolation method.
The oxide film formation under vibration processing in the high-resource parts manufacture in transport engineering
Authors: Ivanov V V , Popov S I , Dontsov N S , Kotesova A A 
Published: September 2020

Abstract
The results of pilot studies of the possible vibration shock and wave technology processes use when receiving an oxidic covering in aluminum alloys items are presented in the article. The technology of an oxidic covering forming in the course of the vibration shock and wave technology influence reflecting an entity of the process mechanical and chemical components complex impact on forming a surface covering layer is fulfilled. The mechanism of structural and phase impacts on a resource and quality of coverings that allowed to determine consistent patterns of receiving qualitative layers of a vibration chemical and mechanical oxidic coating on micro / a Nano level is installed, the causing obtaining the earlier unattainable quality and operational properties of a surface of the details made of aluminum alloys. The morphology researches of a vibrational chemical-mechanical oxide coating surface at the Nano level showed that the time is 66 nanometers thickness a cell of 600 nanometers consisting of 10 growth layers, at the same time the profile shift on the working environment rotation course is set. This structure of a covering promotes an increase in corrosion resistance as there is no access of an aggressive environment to the base metal. The mechanism of structural and phase influences, influence of granulometric characteristics and a dynamic status of the polymeric working environments used as the mechanical activator of the drawing coverings’ chemical processes is studied. The technological chemical solutions adapted to working conditions when receiving the combined chemical and mechanical oxidic coverings with the lowered maintenance of a silico-fluoride of sodium and chromic anhydride are presented. As a result of the covering surface research with the scanning probe microscope use it is established that the oxidic covering surface is not homogeneous and includes the elements which are in solution and in aluminum alloy composition
The compaction zone parameters’ determination when grinding the cement clinker particles
Authors: Sharapov R R 
Published: September 2020

Abstract
The article discusses the process of grinding cement clinker in a ball mill. A technique for determining the deformations parameters that the crushed particle receives when it interacts with the grinding body, is proposed. The relation for determining the maximum linear size of deformation during the grinding body’s interaction with the cement clinker particle is obtained. The expression for determining the grinding body contact area with the cement clinker particle is proposed. It is shown how the compaction zone is formed during the interaction of the grinding body with the crushed particle. The sealing zone has a cylindrical shape with the cylinder radius. It is shown that under the action of the introduced fracture energy by the grinding body, the material in the compaction zone starts expanding in the direction perpendicular to the impact force. This allows to determine the number of particles into which the cement clinker particle breaks up when hit by a grinding body.
The air separator design improving
Authors: Sharapov R R 
Published: September 2020

Abstract
The article addresses the issue of grinding cement clinker in ball mills. The world various activities increasing the efficiency of the ball mills with low efficiency are presented and offered in the article. An effective way to increase the efficiency of ball mills is to transfer them to a closed circuit of work with air separators. To improve the air separator efficiency, the article proposes a modified aerodynamic design of the air separator. The parameters of the components included in the aerodynamic scheme, such as cyclones, dampers, a fan, a rotary valve and so on, are determined. A mathematical model of the modified separator operation recorded for the circulation circuit and the main direction of the path are proposed. According to the proposed method, an industrial air separator was calculated to obtain the fine powders. It is shown that by controlling the proposed aerodynamic scheme gas material tract air separator parameters, the separation process can be controlled.
The quality analysis of the anti-corrosion coatings metal structures operating in difficult conditions
Authors: Deryushev V V , Zaitseva M M , Kosenko E E , Kosenko V V 
Published: September 2020

Abstract
The simplest and most reliable way to protect metal structures from corrosion are the paint coatings, which, in comparison with other protection methods, have several advantages (manufacturability, maintainability, economy, compatibility with other protection methods, etc.). The issues of experimental quality analysis of the typical anticorrosion coatings designed to protect metal structures operating under aggressive environmental conditions and industrial factors are considered. It is proposed to use such indicators as adhesion, thickness and weather resistance as the main indicators of the coatings’ quality. The methods for the experimental determination of these parameters on the laboratory samples and the construction of an integral indicator of the anti-corrosion coatings quality are proposed. On the selected typical coatings example, the experimental dependences of their quality indicators on temperature, the number of “freezing-heating” cycles, the magnitude of the shock load and the water salinity degree are analyzed. The obtained data were used to determine the weather resistance of coatings and their quality indicator, which was proposed to use as the sufficiency integral indicator. Its essence lies in the assumption that there is a border beyond which an increase in the indicator is pointless for each of the quality indicators, since it does not lead to an improvement in the coating quality and can even be harmful due to the other uncontrolled indicators’ possible deterioration.