The study evaluated the effect of the spring position in the panel on the amount of force required for vertical pushing of the columns. The results show that the farther the spring is from the hinge, the less pushing force is required to lift the column. In this method, the column was connected to the panel by hinged hinges at the factory, which allows lifting elements by crane as a single group during the installation of the frame structure on the construction site. In addition, a spring is installed on the panel at a certain distance, helping to push out the column and secure it. In this article, a threaded connection of precast reinforced concrete columns is proposed, which can be used to connect elements of fully assembled buildings and structures. The contact-screw connection of precast reinforced concrete consists of an upper and lower column, both have a cylindrical steel external thread in the end section connected. The strength of the screw column connection is determined by ensuring the transmission of axial loads and torque in the joints, ensuring the destruction caused by cutting and thread confusion that may occur between the connected columns. By means of the necessary calculations for the screw connection of columns made of precast reinforced concrete the corresponding rigidity and strength were confirmed. The new connections will contribute to the development of construction, its energy efficiency and acceleration of the installation process. These are effective approaches to reducing effort, time, and labor and energy costs.

Keywords: prefabricated buildings, passive assembly, column connection, screw connection, energy efficiency of installation, mounting spring, hinge loop

The importance of ensuring reliable operation of steel vertical tanks is emphasized. Based on the analysis of a number of scientific publications and regulatory documents, the most characteristic defects are presented in tabular form by groups, the combination of which determines the choice of the method of overhaul or reconstruction of tanks. In accordance with the data given in the table, the most common methods of overhaul and reconstruction of steel vertical tanks are considered.It is noted the need to develop organizational and technological solutions based on information technology, using servers for monitoring through the GLONASS / GPS systems, which will allow, within the framework of monitoring, to detect defects and damage to structural elements in a timely manner during the operation stage and ensure their elimination in order to increase the residual life of vertical steel tanks .

Keywords: residual life, causes of defects, welds, cracks, work methods

The article discusses the basic principles for choosing multi-purpose design solutions for construction production during a forensic construction and technical expertise, and also presents an algorithm for solving problems of this type. Based on the interpretation of the results of theoretical work and the analysis of judicial practice, a method was obtained that can be used in the conduct of judicial construction and technical expertise to solve the problems of choosing design solutions and materials.

Keywords: judicial construction and technical expertise; building production; design solutions; construction expert; mathematical modeling

The priority of modern construction is the consolidation of existing urban development, with existing infrastructure, communications, developed transport network, proximity to the historical center of the city, providing the population with comfortable accommodation and amenities. Construction has a number of features associated with the cramped conditions of the construction site, the development of underground space, which requires fundamentally new organizational and technological approaches in construction, justification and development of the most effective and economical methods for the construction of buildings and structures in dense urban development.

Keywords: cramped construction conditions, underground space, resource conservation, energy efficiency of construction facilities, construction production

In this paper, a model of automation of the quality control system for the organization of construction of particularly dangerous and technically complex facilities in Russia has been developed. The model uses the initial and replenished databases of general and special work logs, as well as the database of certification and authorization documentation and the links established between them. The developed model will optimize the areas for storing documents in administrative and household buildings and will provide simultaneous access to information for all interested persons.

Keywords: quality control, automation of quality control, organization of construction, project documentation, working documentation, hazardous and technically complex objects

The article talks about improving the competencies of professionals in the management of construction projects based on the international standard IPMA ICB4. Project management has become one of the most important management mechanisms in the market economy system today. Getting the effect of the project management process gives the company a lot of benefits; increases the likelihood of achieving the goals; provided optimal use of resources and satisfaction of the needs of stakeholders. To increase the economic efficiency of investment and construction projects, a competence map of the construction project manager (project manager) has been developed. It is necessary to improve the competencies of professionals in the management of construction projects using the experience of international standards.

Keywords: project, project management, project management, certification, competence, investment and construction complex, international standard, IPMA ICB4 standard, competence map, certified professional

An algorithm is given for carrying out repair work in rooms where devices with ionizing radiation sources are located (inspection points, X-ray machines, computed tomography devices, mammographs, etc.). All stages of the work are considered: the development of documentation, the conduct of examinations, the implementation of construction and installation works, the commissioning of the object (apparatus). Practical recommendations are given on the preparation of the required design and estimate documentation and repair work. The article was written on the basis of completed research work No. 20-147.

Keywords: construction and installation works, repairs, buildings and structures, ionizing radiation sources, X-ray machines, computed tomography devices, expertise

The problem of increasing energy efficiency remains one of the most important for industries and human activity today. The construction industry is one of them.The problem of the construction of energy-efficient multi-storey residential buildings is closely related to the quality of construction control. The article discusses the main stages of the implementation of possible defects in the enclosing structures of a multi-storey residential building. The systematization of defects is given and the causes of their occurrence are presented. Solutions are also proposed to reduce the negative impact of poor-quality construction control of enclosing structures for the purpose of further study.

Keywords: construction control, energy efficiency, enclosing structures, multi-storey buildings

The article discusses the ways of developing strategies of urban spaces in countries such as Singapore, Sweden, Switzerland. An extensive analysis of the strategies used by the governments of these countries to improve the environmental situation has been carried out, which can be taken as an example for implementation in the Russian Federation

Keywords: resources, energy, energy conservation, energy efficiency (EE), ecology, construction, law, MSW, development, change

Results: in this article, the authors reviewed the process of workforce planning on the example of 3 General Contracting organizations. Having the technical documentation on the objects of the General contractors under consideration, the authors were able to deduce the number of workers during the construction of buildings. After analyzing the available statistics, we made a number of graphs showing the movement of monolithic teams on the objects. Based on the resulting graphs, the authors determined the average deviation of the actual number of monoliths from the planned one. Conclusions: the authors analyzed the dynamics of the construction of characteristic objects of different General Contracting organizations, indicating the difference in the values of the planned (projected) and actual labor resources at the facilities. Also, in this article the authors consider a number of the most used in the construction industry software systems for automation of labor resource planning processes, made their analysis and comparison of the main features and characteristics.

Keywords: Software systems in planning, current planning, labor resource, systematization of labor resource fluctuations, automation of planning, production program, labor resource planning

This work is devoted to the problem of the shortcomings of the current regulatory and methodological literature, which complicate the conduct of construction and technical judicial expertise. On the example of the building in Rostov-on-Don, the shortcomings of the normative and methodological literature in the areas of possible use of modern equipment for the inspection of structures are shown. This lack of the necessary normative literature in the field of non-destructive testing is clearly shown. This article shows the difficulties which experts face due to the indicated shortcomings. Conclusions based on the results of the study are made.

Keywords: cconstruction and technical expertise, normative literature, methodical literature, laser scanners, non-destructive control, masonry

The paper considers the issues of the development of executive calendar plans formed during the implementation of the construction of objects of integrated development of the territory (CAT). The complex development of the territory involves, in addition to the construction of residential facilities, the construction of transport, communal and social infrastructure facilities. The author propose a methodology for analyzing executive calendar schedules (ECG) based on the experience of implementing CAT projects. ECG analysis is aimed at developing improved schedules that are used in the development of organizational and technological documentation (OTD) for similar complexes. The methodology allows us to take into account the real conditions of construction of facilities and the capabilities of construction and installation organizations, which increases the feasibility of calendar plans as part of the department.

Keywords: executive calendar schedules, complex development of the territory, reasons for downtime, improved schedules, duration of work on objects

Construction, as one of the fundamental sectors of the economy, requires a large amount of building materials, products and structures used as components for the construction of buildings and structures. The uneven provision of the territory of the Russian Federation with various minerals used in construction has led to the peculiarities of the localization of enterprises for the production of building materials in different regions. To overcome the effect of spatial remoteness between manufacturers and consumers of construction industry products, logistics directions for their transportation are being formed to provide construction companies with the necessary amount of resources and materials for the uninterrupted implementation of construction, installation and finishing works. In this article, based on the analysis of the transportation of construction goods across the territory of the Russian Federation, the key logistical directions for their implementation are identified and their parameters and features are characterized.

Keywords: construction, logistics, logistics areas, building materials, cargo transportation

Ecology is an acute problem in the modern world. At many enterprises and in many processes, they strive to reduce emissions of waste and natural gases that have a negative impact on the environment. The author of the article suggests using energy-efficient technologies in housing construction, namely, when carrying out major repairs of apartment buildings in the city of Moscow. In this article, the author considers technologies that reduce power consumption, which can also be applied during major repairs. In particular, an important role for reducing emissions of harmful substances into the environment is the reduction of heat consumption in apartment buildings. The result of the introduction of the technologies listed in the article will be an improvement in the standard of living in the old housing stock.

Keywords: capital repairs, city environment, factors, building, energy efficiency, heat loss, apartment building, ecology, emissions, waste

The development of the construction industry has both positive aspects of a social and economic nature, and negative ones - associated with an increase in the number of accidents, low quality of construction and installation work and the emergence of disputes between participants in construction production. The resolution of conflict situations arising in the construction industry between business entities is possible with the use of special construction and technical knowledge. One of the most demanded forms of application of such knowledge is judicial construction and technical expertise.

Keywords: construction, construction and technical research, forensic construction and technical expertise, expert opinion, research questions

The article considers the cramped conditions of urban development, its types and main problems, during construction work. The organization of monolithic works at the construction site is also presented.

Keywords: monolithic works, constrained construction conditions, constriction, organization of monolithic works, concreting, construction site, monolithic framework, building compaction, problems of constriction, organization of construction, point development

In today's Russian society, people with limited mobility often have limited access to urban resources; therefore, ensuring their independent life is an important task for the state and society. The idea of forming a barrier-free urban environment is relevant, which necessitates the creation of modern and promising methods for adapting urban space for people with limited mobility.

Keywords: barrier-free environment, people with limited mobility, accessible urban environment, city territory, infrastructure, government program

Carbon formation in diesel engines affects an increase in the temperature of the sleeve, a decrease in the thickness of the oil film, an increase in oil fumes, which causes more intensive wear of the piston group cylinder parts. According to the theory of heat exchange, the heat flow from the working fluid (combustion products) is directed perpendicular to the surface of the piston bottom and is proportional to the equivalent temperature to the average heat transfer coefficient per cycle. Heat can also be supplied to the side surface of the piston bottom, but since the thermal gap between the piston head and the cylinder is small, the heat flow is insignificant. The deposition of carbon deposits on the bottom of the piston and cylinder head causes a slight decrease in its temperature, but at the same time the temperature of the cylinder liner increases, which causes a change in the gaps of the "piston-sleeve" interfaces. Experimental determination of interface gaps on a running engine is associated with significant difficulties. As a result, a computational and theoretical analysis of changes in the magnitude of thermal gaps was performed with a decrease in the thickness of the carbon layer on the bottom of the piston. The deposition of carbon deposits on the bottom of the piston indicates less favorable operating conditions of the piston-sleeve conjugations due to an increase in the dynamic performance of the cycle.

Keywords: quality, surface, part, performance properties, roughness, friction, wear, research, processing, physical and mechanical properties, hardening, deformation

The results of an experimental study of the process of laying asphalt mix with automation components of the technology of non-destructive continuous compaction control in the field of road construction are presented. The research was carried out in order to obtain real data for the task of creating a quality control system for compacting road materials in real time. During the study, the operating parameters of the paver were measured (velocity of movement, the frequency of impacts of the tamper, the frequency of vibration of the plate), the temperature of the compacted asphalt mixture, the thickness of the pavement layer, the vertical acceleration of the vibrating plate. The study used asphalt concrete mix type A grade I according to GOST 9128-2013. The operating parameters varied: the frequency of impacts of the tamper, the frequency of vibration of the plate. The acceleration of the vibrating plate was determined using a digital accelerometer with wireless signal transmission via Bluetooth to a smartphone with the Android operating system. The paper obtained the values of dimensionless complexes, the index of compaction of asphalt concrete mixture - the peak factor characterizing the change in the quality of compaction of asphalt concrete mixture.

Keywords: asphalt mix, non-destructive technologies, continuous compaction control, compaction index, acceleration of vibrating plate

During the reconstruction of facilities carried out in the conditions of existing urban development, questions often arise to solve the specific task of carrying out work on capital construction projects. For example, the work considered in the article on the reconstruction of health facilities is carried out in the conditions of existing institutions, various campuses or environments. At the same time, a number of factors that significantly affect the labor costs of workers, the methods of organizational and technological design adopted in construction are not taken into account. In the process of organizing reconstruction work in conditions of limited space and in rooms of small volume, there is a problem of determining the duration of work. There is also a problem of determining the number of necessary labor resources for a directive specified duration according to the terms of Government contracts. To solve the problem of coordination, the article considers the possibility of using transactional platforms.

Keywords: reconstruction, healthcare facilities, organizational and technological solutions, documentation, workspace, time, labor costs, transactional model, productivity

The concept of sustainable development of cities determines the relevance of the formation of organizational and technological approaches to the creation and development of urban public spaces in accordance with modern trends in urban planning and the needs of the population. Urban public spaces are the key to the development of a comfortable urban environment and represent the cultural and social aspect of the modern city.

Keywords: urban public spaces, comfortable urban environment, sustainable development, improvement, city territory, infrastructure

The focus of attention is on the possibility of replacing exterior envelope structures for reconstruction of industrial buildings with the aim of increasing the plant areas. The operating procedures are shown alongside the material characteristics ensuring energy efficiency of reconstruction. The paper underlines that the justification of the optimal choice of a process setup / technology solution is an important stage in building reconstruction.

Keywords: three-layer envelope structures, fiber-reinforced foamed concrete units, composite foams, insulating properties, lightweight, efficiency

In this article is considered progressive technology for producing heat-insulating materials by the method of self-compacting masses. Implementation of this method will allow obtain a significant economic effect in comparison with traditional technologies. Due to the use of the effect of obtaining excess pressure in a closed perforated form from an increase in volume during heating of pre-expanded polystyrene granules, it became possible to remove excess moisture, reduce the time of the technological process, and reduce energy consumption. This method allows to combine several processes in one operation: compaction of the mixture, heat treatment, removal of excess moisture. As a result of theoretical and laboratory research and experimental-production approbation, the possibility of implementing of heat-insulating materials of a wide range of applications with improved operational properties into mass production has been obtained. Perlite concrete is one of the effective heat-insulating material, the production of which is possible using the method of self-compacting masses. An assessment of the qualitative efficiency of perlite concrete was carried out: the thermal conductivity coefficient is within the limits required for effective heat-insulating materials. It was concluded that the use of perlite concrete in construction is promising: it is possible to reduce the drying time in 10-12 times, eliminate drying shrinkage, eliminate mechanical processing of products after heat treatment, obtain products of various configurations and volumes, with an improvement in strength characteristics at a minimum density. In this article is considered progressive technology for producing heat-insulating materials by the method of self-compacting masses. Implementation of this method will allow obtain a significant economic effect in comparison with traditional technologies. Due to the use of the effect of obtaining excess pressure in a closed perforated form from an increase in volume during heating of pre-expanded polystyrene granules, it became possible to remove excess moisture, reduce the time of the technological process, and reduce energy consumption. This method allows to combine several processes in one operation: compaction of the mixture, heat treatment, removal of excess moisture. As a result of theoretical and laboratory research and experimental-production approbation, the possibility of implementing of heat-insulating materials of a wide range of applications with improved operational properties into mass production has been obtained. Perlite concrete is one of the effective heat-insulating material, the production of which is possible using the method of self-compacting masses. An assessment of the qualitative efficiency of perlite concrete was carried out: the thermal conductivity coefficient is within the limits required for effective heat-insulating materials. It was concluded that the use of perlite concrete in construction is promising: it is possible to reduce the drying time in 10-12 times, eliminate drying shrinkage, eliminate mechanical processing of products after heat treatment, obtain products of various configurations and volumes, with an improvement in strength characteristics at a minimum density.

Keywords: method of self-compacting masses, heat-insulating perlite concrete, electric heating, closed perforated volume, bead polystyrene, energy efficient material

A computer mathematical model was developed to predict the course of working processes in the device. To estimate the reliability of the obtained model, the study of mass-exchange characteristics of the experimental cooling device was carried out. Analyzing the graphs of mass-exchange characteristics of the model and the experimental cooling device it is possible to conclude about their correspondence. The conducted tests allowed to reveal three characteristic zones of distribution of two-phase gas-liquid flows arising in the working zone of the atomizer at the atomizer's output in the steady-state operation mode. It is proved that the optimum air pressure at the inlet of the vortex chamber can be considered as 0.10...0.15 MPa.

Keywords: ejection, cutting zone cooling, mathematical model, dispersant, emulsion, aerosol, lubrication, turbulence, pressure, mass transfer, atomization

The article deals with project management as one of the most important mechanisms of management in the system of market economy. In Russia, the field of project management, including construction, is actively developing, taking into account international experience and national peculiarities. Digital transformation of technological and business processes in construction is rather weak compared to other Russian industries, which is due to the specific activities of construction companies, during which the necessary data are not accumulated continuously, but are collected at different stages of the project. The experience of implementing digital technologies in the implementation of investment and construction projects is considered on the example of the experience of a federal construction company, whose branches are located in several Russian cities.

Keywords: construction, project, investment, digitalization, digital technologies, BIM technologies, online office, Bitrix24 service, 1C:PM Project Management, CORP, VIM-model