The article describes the main technological features of strengthening subsidence soils by cementation. The features of quality control of work on strengthening arrays of subsidence soils by cementation are considered. On the example of a multi-storey residential building exposed to uneven deformations, the reasons for the violation of technologies during the strengthening of the foundation soils are analyzed. The results of laboratory and field tests of soils are analyzed as part of a re-examination of the foundations fixed by the cementation method during the construction of a multi-apartment three-section residential building. The actual results of laboratory tests are compared with the values set by the project. The diagrams of the location of pits near the building are given. The photos show the presence of cement veins. The causes of uneven deformations of the newly erected object have been established based on the results of a laboratory study of the fixed subsidence soil. It is noted that strict quality control of work on strengthening subsidence soils will allow avoiding emergency consequences during the construction and operation of buildings in the future.

Keywords: cementation of soils, subsidence soil, artificial strengthening of soils, injection, geocomposite, armoelement, drilling, testing of soils, construction control

Reducing the consumption of heat resources in construction and housing and communal services is one of the key tasks solved by design engineers. The increase in the thermal protection of buildings is determined by regulatory documents, but construction customers often require it to be strengthened without any feasibility study. The objective of the study is to develop a graphical-analytical model, the analysis of which allows you to choose the most optimal combination of heat resistances of the coating (walls) and translucent structures of a particular building object.

Keywords: energy-saving project, thermal protection of buildings, "indifference" curves, the method of the fastest descent

With the increasing depletion of forest resources in buildings of normal and reduced class of responsibility for wooden structures belonging to the 2nd and 3rd classes of functional purpose, the possibility of using round timber and sawn timber from soft deciduous species such as aspen and poplar should be considered. since aspen ranks second in terms of area of ​​growth among deciduous species and is found almost throughout the entire territory of the Russian Federation. An assessment of the properties of soft deciduous wood is carried out for use in building structures that perceive power effects. The data on the percentage of lignin and cellulose in coniferous and soft deciduous wood are given. The main physical and mechanical characteristics of soft deciduous wood, the calculated resistance of soft deciduous wood for the main types of stress state are presented. The results of a comparative calculation of interfloor structures made of coniferous and soft deciduous wood are presented. It is shown that the use of soft hardwood for building structures will contribute to the expansion of the range of wooden elements against the background of the development of expensive and labor-intensive in the manufacture of glued wooden structures.

Keywords: round timber, sawn timber, soft deciduous wood, physical and mechanical characteristics of wood, design resistance, flexural modulus

This article is devoted to the actual problem of using curvilinear. stained glass facades of buildings in a modern urban environment. Stained glass glazing of radial facades of buildings is one of the characteristic elements of modern architecture due to significant advantages, such as reducing wind and climatic load on the building, environmental friendliness, energy efficiency, improving microclimate parameters, increasing artistic and compositional attractiveness, etc. The article considers a set of tasks, the solution of which will allow eliminating the negative consequences of the use of curved translucent structures in the outer shell of the building by taking maximum account of technological climatic, physical and aesthetic factors in the design of modern glazing systems for high-rise buildings with curved facades.

Keywords: translucent enclosing structures, radius facades, climatic load, high-rise buildings, glass unit lensing, focusing, urban environment, energy saving, environmental friendliness

Flexible structures typically have low flexible stiffness and a low material damping factor. Mild excitation can result in damaging high amplitude vibration and long recovery times. This can lead to fatigue, instability and poor performance. Vibration control of flexible structures is an important issue in many engineering applications, especially for precise performance in aerospace systems, satellites, flexible arms, etc.

Keywords: natural frequency, flexible stiffness, vibration, Langrange's equation, Euler's method, damping force, beam theory

The factors identified in this article, affecting the increase in the rate of monolithic construction of multi-storey buildings and structures in the winter. Organizational and technical solutions have been established, which must be taken into account when developing organizational and technological documentation. The object of the research in this article is the process of erection of residential monolithic buildings in winter by the high-speed method, the subject of the research is the organizational and technical parameters that affect the speed and quality of construction processes. The practical significance of this work lies in the fact that the results of the study can be used for the rational organization of construction production by its participants.

Keywords: monolithic construction, winter concreting, organizational and technological solutions, high-speed monolithic construction, organizational and technological potential

The article is an overview and is devoted to shallow foundations. The authors classify existing shallow foundations according to various criteria; consider non-standard foundations with an "atypical" structure that is rarely used in construction; emphasize the advantages and disadvantages of certain solutions, their features.

Keywords: foundation, construction, shallow foundation, strip foundation, column foundation, building structures

The article discusses the problems and key points in the construction foundations of transport structures. The ways of solving the problems that arise during construction, as well as methods of quality control of materials and technological processes are proposed. The technical aspects of the construction of the armoured frame foundations are analyzed.

Keywords: foundation, construction, transport structure, bridge, road, analysis, quality control, concrete, armature, construction, material

This paper considers non-traditional methods for creating an optimal technological process for the manufacture of heavy energy objects using the principles of wildlife. A comparative analysis is carried out between the principle of operation of the developed version of a reloading machine for fuel cells in a nuclear reactor, various options for load-gripping and suspended manipulating devices, and analog processes borrowed from nature. The scheme of manufacturing a heavy energy object is analyzed when considering the chain "mechanics - spider, ant - hoisting-and-transport machines - engineering psychology".

Keywords: heavy energy objects, mechanics, wildlife, invention

This article is descriptive, in this scientific article the role of railway transport in the development of territories is determined, an analysis of domestic regulatory and technical literature in the field of pedestrian traffic, regulatory and methodological data in the field of transfer hubs, describes the formation of pedestrian flows to stopping points of railway transport, taking into account the indicators of the external environment, and also describes the method of forming passenger traffic in the city of Moscow at transport hubs of railway transport.

Keywords: transport, pedestrian traffic, pedestrian flow, transport hubs, railway transport

More than 42 thousand bridges on highways are operated in Russia. Most of the bridge park was built in the past years. Bridges are getting old, accumulating destruction and defects and gradually cease to meet the requirements for safety, durability and load capacity imposed on them. It is necessary to spend a lot of effort and money on maintaining a stable working condition of all operated bridges. The use of modern surveillance tools will save financial and time resources. Such means of monitoring and collecting information can be unmanned aerial vehicles: various types and designs of quadrocopters and drones. A quadrocopter inspection of one of the city's overpasses showed high efficiency and quality of the information received. Based on the data obtained, it is possible to judge the technical condition of the object. Of course, the particularly dangerous defects identified during the inspection should subsequently be examined by a specialist to make a final decision. The article presents the photographic materials obtained by the modern method of data collection, the advantages of using quadrocopters in the survey of bridges and the technical characteristics of the equipment.

Keywords: operation of structures, inspection, bridge structures, quadrocopters, drones, defects, destruction,bridge bed

This article is devoted to the problem of heterogeneity of brickwork materials, in particular bricks, in buildings of cultural heritage and identified historical significance, the main building structures of which are made of brickwork. The relevance of this research topic is due to the increased interest in recent years in a detailed study of the behavior of the work and the physical and mechanical properties of structural materials of buildings and structures related to cultural heritage sites, historical and architectural monuments. The author provides an overview of the literature sources related to the pre-revolutionary period and modern publications that reveal the understanding of the use of heterogeneous materials in the brickwork of building structures. The article analyzes the reasons for the use of materials with different physical and mechanical characteristics in the brickwork of preserved historical buildings, the age of which exceeds 100 years or more.

Keywords: bricklaying, re-laying, restoration, bricklaying of historical buildings and structures, heterogeneity of bricklaying materials, physical and mechanical characteristics of bricklaying materials

The analysis of the use of renewable energy sources in Russia is carried out. The main features of the use of energy-efficient technologies in construction are considered. On the example of the construction of a 9-storey residential building, a comprehensive analysis of the construction area is performed. Solutions with the use of energy-efficient and green technologies are proposed.

Keywords: construction, energy-efficient technologies, green technologies, renewable energy sources, energy saving, energy efficiency

The article provides a brief overview of the creation of the Diagrid system, describes the concept of forming this structure, its key elements and their role in creating geometrically immutable integral structures. The main directions of application in construction and the peculiarities of work on vertical and horizontal force effects are given. It also provides an overview of the materials of construction used and the main design constraints. This article will be useful for design engineers and architects engaged in the design and calculation of high-rise buildings, as well as buildings with a complex architectural form made of reinforced concrete and metal structures.

Keywords: diagrid, mesh supporting structures, reinforced concrete structures, metal structures, stability, free architectural form

The article considers the possibility of using a new generation of thermal insulation materials in construction. The authors analyze the distinctive features of thermal insulation boards, reveal the advantages and disadvantages of insulation made of extruded polystyrene foam. Based on the analysis, it is concluded that these materials and technologies are a promising alternative to traditional ones.

Keywords: green roofs, thermal insulation, extruded polystyrene foam, fire hazard class, water absorption, biostability, strength, durability

The main types of formwork systems used in monolithic construction are described. The types of formwork by construction, by the type of concreted structures, by the base material, by turnover, as well as the types of formwork during concreting under different temperature conditions are considered. The historical reference of the appearance of the formwork is given.

Keywords: formwork, frame-monolithic construction, structures, vertical, horizontal, large-panel, small-panel, block, volume-adjustable, heating, inventory formwork

a study of a ventilation system with a local recirculating diffuser was carried out. A three-dimensional model of the office space has been built. Using the STAR-CCM + hydrodynamic computing complex, a numerical simulation of the ventilation system has been performed. The calculation results are analyzed, the advantages of the investigated system are given.

Keywords: ventilation systems, local recirculating diffuser, indoor air quality, energy saving, numerical simulation, STAR-CCM +

The article describes the developed design of a sample of joining solid wood elements on SHERPA plates, which made it possible to simulate the operation of nodal junctions of the main and secondary wooden beams for frame buildings and structures. A procedure for testing specimens by loading in steps with periodic unloading has been compiled and tested on three test specimens. The tests of the approved sample of the joint were carried out, its maximum bearing capacity was established, as well as the load corresponding to the upper boundary of the elastic work area (VGOUR) of the joint. The graphs of dependencies were built: "Load - total deformation Dp", "Load - permanent deformation Dо", "Load - elastic deformation Dу", "Elastic deformation Dу - residual deformation per cycle dо". The deformations of the joint were determined within the limits of the bearing capacity of the sample, the calculated bearing capacity of the joint and the coefficient of transition from glued wood to solid wood.

Keywords: solid wood, SHERPA metal strips, test of a specimen of a joint of wooden elements, load-bearing capacity of the joint, deformability of the joint, upper limit of the elastic work area of the joint, total deformation, permanent deformation

The aim of the work was to analyze the advantages and disadvantages of a typical 2-room apartment and find the optimal solution for redevelopment. As an example, we selected a typical planning solution from the developer of a two-room apartment in a multi-storey residential building. The article considers a variant of apartment remodeling in order to improve the housing characteristics of the premises. It is concluded that the typical rational solution for reconstruction is the reorganization of auxiliary premises in favor of residential premises, changing their configurations. The logic of applying the principles of free planning is reduced to creating conditions for comfortable spatial interaction of functional zones.

Keywords: Planning solution, apartment, functional areas, ergonomics, remodeling, living area, wet area, interior, visualization, furniture arrangement, redevelopment, area, insolation, installation, dismantling, building codes

The article discusses modern methods of strengthening the bowl of a reinforced concrete pool in the development of project documentation for major repairs or reconstruction of capital construction objects based on the results of the survey and assessment of the technical condition of structures. To implement design solutions for strengthening the pool bowl, other methods can also be used, for example, using modern methods of strengthening using composite materials [9-11]. This will increase the rigidity of each structure and the bowl as a whole. The development and implementation of these design solutions using modern methods will allow you to qualify the design of the pool bowl in a working state and return the ability to perceive all the loads acting on it.

Keywords: reinforcement, major repairs, reconstruction, design solutions, reinforced concrete, composite, strength, load-bearing capacity

This work is devoted to the problem of carrying out construction and technical expertise of reconstructed public buildings. The main problems of modern reconstruction of urban development are considered. The differences between the reconstruction of public buildings and residential or industrial buildings have been revealed. The difficulties faced by the contractors during the reconstruction are estimated. The difficulties faced by the contractors during the reconstruction are estimated. The main points that experts turn to when examining a reconstructed object are noted. The disadvantages associated with the lack of a developed procedure for reconstruction and construction and technical expertise are considered. Conclusions based on the results of the study were made.

Keywords: reconstruction, public buildings, the specifics of the work performed, poor scientific study, human safety

The article deals with the case when a concentrated force is applied to the web of a prestressed beam. The preliminary shear stresses do not affect the stress state in the middle of the beam span. However, preliminary normal stresses will act over the entire height of the wall and affect the distribution of the zone of local stresses and the stress state of the web. Determination of stresses in a beam is based on the beam theory of S.P. Timoshenko. The article presents a system of equivalent forces on the edges of the wall and the equation of normal stresses in the cross section of a prestressed beam. Compared to a conventional beam, prestressing reduces normal stresses from concentrated forces.

Keywords: thin-walled structure, steel beam, I-beam cross-section, prestressing, local stresses, local effect, Saint-Venant principle, Timoshenko SP beam theory, Karman's solution, Fourier integral, stress function

The article discusses the possibility of using new generation lightweight materials in construction. The author analyzed the distinctive features of membrane structures, revealed the advantages and disadvantages of the ETFE film. Based on the analysis, it was concluded that these materials and technologies are an easy and promising alternative to traditional ones.

Keywords: innovative facade systems, textile architecture, membrane structures, ethylene-tetrafluoroethylene copolymer film, energy efficiency

Modern design cannot be imagined without the application of BIM technologies. Modeling is increasingly used in the design of new construction of buildings and construction, renovations and major repairs, which makes up the majority of projects underway. 2D programs are still used for the inspection of buildings and construction. Visual and instrumental examination is not a difficult task requiring complex programs. But the introduction of BIM technologies ensures the acceleration of work on the inspection of buildings and structures, significantly improves the quality of the result, and also maximizes the actual condition of building structures.

Keywords: modeling, visual and instrumental inspection, building, construction, building structure, building life cycle, defects, damage, actual state, technical characteristics, operation

The authors ' analysis of scientific publications of domestic and foreign specialists revealed the main goals and directions of further research and ways to ensure them. A review of the scientific literature on the technologies of energy-efficient facade systems in various climatic zones, including in extreme construction conditions, was also made. The characteristic features of modern facade systems are revealed, the advantages and disadvantages of the applied structures and materials are determined. The authors conclude that the choice of a particular type of facade system is inextricably linked with the issues of economic feasibility of the object under construction and the technical, architectural and aesthetic requirements imposed on it. Classifications of plaster and translucent facade systems that provide a high level of energy efficiency of modern construction systems have been developed. The technologies of energy-efficient transforming and adaptive facade systems are consistently and comprehensively disclosed, and the positive dynamics of their development is revealed. Attention is focused on the fact that it is the external enclosing structures that act as an intermediate link between the room and the external environment, and therefore it is necessary to apply such structural solutions of facade systems that could optimize the temperature and humidity regime inside the building in accordance with changes in environmental conditions. The relevance of the monograph, the goals and objectives of the study are noted. The main approaches to ensuring energy efficiency and resource saving of building systems at various stages of their functioning are highlighted. Improving the energy efficiency of built-up areas and residential areas. The relevance of the reviewed monograph is associated with global changes in the information and technological potential of construction science, the improvement of technologies for the construction of new and reconstruction of existing construction systems and structures that meet modern requirements of energy efficiency as the basis of economic feasibility in the subsequent operation of buildings and structures. The problems of energy efficiency of buildings and their solutions at all stages of the life cycle have always been global in nature, inextricably linked with the growing needs of society in terms of improving the quality of the organization of internal space, ensuring a comfortable existence and human activity. The authors ' analysis of scientific publications of domestic and foreign specialists revealed the main goals and directions of further research and ways to ensure them. A review of the scientific literature on the technologies of energy-efficient facade systems in various climatic zones, including in extreme construction conditions, was also made. The characteristic features of modern facade systems are revealed, the advantages and disadvantages of the applied structures and materials are determined. The authors conclude that the choice of a particular type of facade system is inextricably linked with the issues of economic feasibility of the object under construction and the technical, architectural and aesthetic requirements imposed on it. Classifications of plaster and translucent facade systems that provide a high level of energy efficiency of modern construction systems have been developed. The technologies of energy-efficient transforming and adaptive facade systems are consistently and comprehensively disclosed, and the positive dynamics of their development is revealed. Attention is focused on the fact that it is the external enclosing structures that act as an intermediate link between the room and the external environment, and therefore it is necessary to apply such structural solutions of facade systems that could optimize the temperature and humidity regime inside the building in accordance with changes in environmental conditions. The structure, content and scope of the monograph are given.

Keywords: relevance, research, purpose and objectives, review, analysis, presentation style, resource-saving technologies, energy urban planning efficiency, energy security, energy efficiency of the territorial space