The article provides a comprehensive analysis of defects in monolithic reinforced concrete structures, commonly encountered during the construction of multi-storey buildings. The main types of defects and damage are discussed, such as cracks, concrete spalling, destruction of the protective layer, exposure and corrosion of reinforcement bars, formation of cavities, concrete overflow, gravelly texture, geometric deviations, and cold joints in concreting. Their general description, causes of occurrence, classifications, parameters, and consequences for the operational characteristics of the structures are presented. Special attention is given to modern diagnostic methods and repair technologies, which significantly extend the service life of buildings and enhance their safety throughout their lifecycle. The results presented can be used by engineers, builders, and repair specialists to optimize construction processes, control the quality of work, and ensure the timely elimination of identified defects.

Keywords: Inspection of structural elements, reinforced concrete, defects of monolithic structures, cracks, reinforcement corrosion, repair, concrete quality, cold joint, monolithic construction, concrete surface quality

A project is a single system, an interconnected network of elements: participants, resources, processes, and goals. This relationship is critically important for successful implementation by the technical customer service. Processes that are clearly defined and managed ensure consistency and efficiency. Therefore, project design and management requires a systematic approach that takes into account all relationships and strives to optimize each element to achieve a common goal. A system approach is a method that considers a problem or task in terms of its interrelationships and interactions of all elements of the system. In the context of a technical customer service, this approach can be particularly useful for project management, process optimization, and work efficiency improvement.

Keywords: construction project, technical customer, planning, technologies, risks, system approach, project management, documentation of processes, construction site, system

For the effective preservation of cultural heritage sites (CHS), it is necessary to carry out a set of engineering, technical and scientific measures already at the stage of their registration and conservation. Proposed work on the repair, restoration and renovation of CHS is subject to a comprehensive study. The approach to the preservation of CHS should be systemic, including digital volumetric-spatial and planning solutions, technology and organization of repair, restoration and renovation, development of new repair and renovation binders and materials, soils, bases and foundations, calculations of dynamic and seismic impacts, etc. To develop modern repair and renovation binders and compositions, it is necessary to study traditional or so-called handicraft technologies that were used in the old days - in the late period and the Middle Ages. Knowledge of handicraft technologies allows us to develop binders and compositions that are as close as possible to the original (parent) ones. From the point of view of a natural study of handicraft technologies for the production of lime binders, the following are of interest: those found in the Shoan tower complex. Guli, Dzheyrakh district, Republic of Ingushetia, fragments of kilns, the study and research of which is the subject of this article.

Keywords: historical and cultural monuments, cultural heritage sites, handicraft technologies, furnaces, kilns, X-ray phase analysis

Organization of repair and restoration and reconstruction works at cultural heritage sites is based on substantiation of conditions and factors influencing choice of solutions on technology and organization of a set of works, on analysis of methods of development of organizational and technological solutions and modeling of work production schemes, as well as on selection of criteria for evaluation of work organization options and methods of selection of organizational and technological solutions. One of the key stages of preparation for repair, restoration and reconstruction of cultural heritage sites is development of a calendar plan and schedules and network models. They are mandatory in the work production project (WP), determining the terms, order and volumes of work. The work presents forms of calendar schedules and plans, as well as a network model of development of scientific and design documentation on preservation of cultural heritage sites (in general, by stages and local works) and a network model of preparation of repair and restoration and restoration and reconstruction works.

Keywords: historical and cultural monuments, cultural heritage sites, repair, restoration, reconstruction, schedules, calendar plans, network schedules

The article considers the sequence and technology of conducting surveying before starting excavation work on a bush site for the oil and gas industry. Surveying works play a key role, ensuring the necessary accuracy and reliability of the development of oil and gas fields. These works include conducting field measurements, detailed terrain analysis, calculating the volume of soil masses involved in the construction of earthworks, as well as monitoring geometric parameters and sand pits. An important stage of surveying is the creation of a detailed topographic map of the territory. Based on this map, it is possible to accurately plan the location of all future structures, ensuring optimal use of space and compliance with all regulatory requirements. The use of modern technologies, such as geodetic GPS systems and BIM technology, can significantly improve the accuracy and efficiency of these works. Special attention is paid to compliance with industrial safety standards, which minimizes costs and risks in the development of oil and gas industry enterprises. Thus, surveying is an integral part of the preparation and implementation of projects in the oil and gas field, contributing to the efficient and safe performance of all necessary work.

Keywords: diversification of management, production diversification, financial and economic purposes of a diversification, technological purposes of ensuring flexibility of production

This article discusses effective ways and means for analyzing the condition of real estate objects, as well as predicting changes in their operational properties over time. These approaches open up prospects for improving the accuracy of predictions of wear patterns of both physical and functional components, as well as the aging of building structures, structures and engineering systems. Ultimately, this helps to maintain the proper level of their work and ensure high-quality functioning. Considerable attention is also paid to the general kinetic theory of structural wear of construction facilities, as it is known that this theory makes it possible to assess the corresponding reliability risks with fairly high accuracy, depending on the service life of the building structures of the facility. As a research tool, it is proposed to use a universal mathematical model of wear, which illustrates the dynamics of the processes of structuring and destruction of building systems throughout their entire service life. The model reflects the constant interaction of the structure with long-term impact factors. A statistical model has also been developed to determine the probability of the transition of building elements to a state of destruction due to the influence of adverse factors, which is directly related to the loss of their reliability.

Keywords: organizational and technological solutions, reliability, quality control, efficiency, cost, labor productivity