RECOVERY OF SEWER PIPELINES USING ANCHOR POLYETHYLENE SHEETS

Raising of problem. Microbiological corrosion, which occurs as a result of the vital activity of microorganisms in wastewater, causes the destruction of the vaulted part and significantly reduces the service life of reinforced concrete and concrete drainage pipelines. Partially destroyed pipelines of sewerage networks, operating in various hydrogeological conditions, often at great depths, must be restored using materials that can ensure the reliability of further operation in conditions of microbiological corrosion, cost-effectiveness and ease of repair. These are primarily polymer-based materials. The open method of repair and restoration work on sewer pipelines has significant advantages over trenchless, if their depth is insignificant and urban transport and pedestrian arteries do not interfere with the work. Thus, the development of a technology for repair and restoration of reinforced concrete and concrete collectors destroyed by microbiological corrosion using modern materials based on polymers is an urgent task. Purpose. Development of technology and sequence of repair and restoration work for the restoration of the destroyed vaulted part of sewer reinforced concrete and concrete pipelines by an open method using pneumatic formwork and protective anchor polyethylene sheets. Conclusion. As a result of the research, a technology and sequence of repair and restoration work was developed to restore sewer reinforced concrete and concrete collectors from 5 stages, including the stage of cleaning the collector from corrosion products and destroyed parts, installation of a pneumatic formwork and an anchor polyethylene sheet in the surviving chute part of the collector, installation of metal inventory formwork, restoration by concreting the arch on top of the anchor polyethylene sheet and dismantling of the pneumatic and metal inventory formwork.

Photogrammetry (SfM) vs. Terrestrial Laser Scanning (TLS) for Archaeological Excavations: Mosaic of Cantillana (Spain) as a Case Study

The discovery of a Roman mosaic from the 2nd century AD in Cantillana (Seville) generated interest and the need for exhaustive documentation, so that it could be recreated with real measurements in a 3D model, not only to obtain an exact replica, but with the intention of analyzing and studying the behavior of two main geomatics techniques. Thus, the objective of this study was the comparative analysis of both techniques: near object photogrammetry by SfM and terrestrial laser scanner or TLS. The aim of this comparison was to assess the use of both techniques in archaeological excavations. Special attention was paid to the accuracy and precision of measurements and models, especially in altimetry. Mosaics are frequently relocated from their original location to be exhibited in museums or for restoration work, after which they are returned to their original place. Therefore, the altimetric situation is of special relevance. To analyze the accuracy and errors of each technique, a total station was used to establish the real values of the ground control points (GCP) on which the comparisons of both methods were to be made. It can be concluded that the SfM technique was the most accurate and least limiting for use in semi-buried archaeological excavations. This manuscript opens new perspectives for the use of SfM-based photogrammetry in archaeological excavations.

RESTORATION OF BUILDINGS OF OLD PART OF THE SAMARA CITY

For residents of Samara, numerous tourists of the city, old Samara is of direct interest with its merchant way of life, historical monuments testifying to the emergence of a historical sett lement on the banks of the Volga and its development from the emergence of the wooden fortress “Samara town” to the modern million-plus city. The activity of Samara architects-restorers allows tracing this path of development. Carrying out restoration work is a very long and laborious process, including the study of historical documents and archaeological fi nds, research work.

Exploring the Potential for Electric Retrofit Regulations and an Accreditation Scheme for the UK

Electric vehicles have zero tailpipe emissions and can reduce greenhouse gas emissions by up to 90% compared to internal combustion engine (ICE) vehicles. Electric retrofits involve converting an ICE vehicle to an electric drivetrain, aiding the transition to zero emission vehicles by adapting current vehicles and, thus, reducing the transport sector emissions. Other benefits include charge exemptions in major cities, reduced driving costs, and lower maintenance. The UK has a considerable retrofit market, with a large price range of services offered. There is a varying level of practice undertaken and current regulations may not adequately cover these retrofits. Industrial engagement has highlighted the varying levels and common themes of practice, such as restoration work, computer-aided design, and finite element analysis. Converting the registered fuel type of a vehicle to electricity, post-retrofit, appears to be a limited process, with few steps. Therefore, a regulatory framework, such as an accreditation scheme, could be introduced to ensure high levels of safety and good practice. Future work suggestions include further meetings with the DVLA and DVSA, and meeting the Motor Insurers’ Bureau.

WAYS OF ARCHITECTURAL REVALUATION OF ARCHITECTURAL SUBSTANCE IN THE HISTORICAL ENVIRONMENT OF THE CITY

The multifaceted problem of the relationship between the old and the new in the structure of cities subject to reconstructive transformation covers not only the range of tasks for the integration of historically composed and new buildings, but also a number of ambiguous issues of architectural revaluation of historical architectural and urban planning substance. lost elements to improve the aesthetic value of the urban environment and further preserve its integrity. If the solution of issues of urban coherence of historical and new buildings is based on the variability of the respective location in the urban structure of urban formation, the ways of architectural revaluation are based on the principles of volumetric and tectonic perfection of historical substance. ensembles, often by means of finely tempered harmonization of old and new architectural solutions (Hereditary development of compositional and spatial features of the city center). European urbanism of the twentieth century. He also knows cases of architectural revaluation of large urban complexes, such as in the process of restoration after the military destruction of the historic areas of Warsaw and Gdansk, where the problem of restoring the architectural integrity of buildings was combined with issues of restoration, reconstruction, modernization and necessary rehabilitation. on the legitimacy of such revaluation measures, which were not based on the restoration of authentic historical heritage, but in fact on its reproduction "from the ground up", based not only on scientifically sound materials, but often on architectural conjecture, method of analogues, etc. The controversy over the architectural revaluation of historic buildings began in the late nineteenth century, when the issues of conservation and restoration in a set of reconstructive urban planning tasks began to require immediate resolution. Renowned British art critic John Ruskin, reacting sharply to the imperfections of restoration work that led to significant distortions and even distortions of valuable historical substance in various countries, said: «Reproduction from nothing of something that was once great and beautiful in architecture is as impossible as return to life…» (Рёскин 81–82).

RESEARCH OF INNOVATIVE MECHANISMS CREATION OF MODERN BUILDING MATERIALS FOR IMPROVEMENT OF PRODUCTION PROCESSES

Purpose. To reveal the mechanism of formation of contact zones and purposeful choice of mastic composition and its substantiation on the basis of revealing of regularities of interrelations "mastic composition – waterproofing resource". Methodology. The sequence of changes in the technical condition of roofing materials, which varies from normal without damage to emergency with intermediate satisfactory and unsuitable for normal operation depending on the specific damage and leakage of the roof affects the definition of conventional material resources, means and methods of arrangement and arrangements. roofs, as well as the mechanism and kinetics of loss of serviceability are a key factor in improving the whole set of measures aimed at making technology competitive. Results. Technologies of repair of point and local damages in the form of cracks, breaks, exfoliations which are carried out by cutting and the subsequent gluing of pieces of cloths on the prepared sites with filling, allow to receive short-term results. Elimination of continuous surface damage by applying an additional layer of rolled or mastic material is associated with the inevitable preservation in the lower layers of the causes of premature loss of operational functions of the coating. The results provide an opportunity to perform non-dismantling repair and restoration work using purposefully proposed repair composition with the minimum possible cost of resources and a high degree of mechanization. The developed technology is based on the ability of the used repair composition to impregnate and saturate the adjacent surfaces with ingredients that can eliminate damage of a certain type and return the coating or protective layer of the initial waterproofing potential and strengthen it. Originality. Substantiation of possibilities of use of the residual waterproofing resource of the existing soft roof by its saturation with ingredients of the offered repair composition. Practical value. It is possible to effectively use, restore and enhance the residual waterproofing potential of bitumen-roofing roof by pneumatic spraying repair composition of the developed composition.

Technical aspects of the reconstruction of historic gardens

Built elements and structures are a prominent component of our historic gardens, both in terms of function and artistic composition and garden scenery. The surveys of historic garden structures are important research tasks, which also underpins and validates restoration work. In most cases, the neglected state of historic gardens and sites and the unavailable archival materials do not allow an authentic restoration of historic gardens to their original state. Nevertheless, there is a real need to reconstruct our historic gardens, based not only on historical authenticity but also on a systematic reinterpretation of the relationship between society and landscape. The objective of this article is to present a general methodology for renewal of historic gardens through examples of specific garden reconstructions. The case studies are the authors' own design works, which demonstrate the application of different design approaches, highlighting details of the reconstruction of specific built garden elements.

Involvement of a Fishing Community in the Eradication of the Introduced Cactus Mouse (Peromyscus eremicus cedrosensis) from San Benito Oeste Island, Mexico

San Benito Archipelago is internationally important for the conservation of 13 species of seabirds. San Benito Oeste, the largest and only inhabited island, was declared mammal-free in 2000 after a series of eradications conducted in collaboration between the fishing cooperative Pescadores Nacionales de Abulón, the Mexican conservation organization, Grupo de Ecología y Conservación de Islas, A.C., and the Mexican Government. The archipelago remained mammal-free until 2006, when an unusual invader, the Cedros island cactus mouse (Peromyscus eremicus cedrosensis), was accidentally introduced to San Benito Oeste island. The same collaboration scheme involving locals, conservationists, and authorities was once again put in motion, delivering tangible results. Research informed the mouse eradication strategy, the local community supported the operation, and the mouse eradication was successfully implemented in December 2013. To date (8 years later), no mammals have been recorded in the archipelago, which suggests community-led island biosecurity is working. In addition, this collaborative restoration work contributed to the creation of the Baja California Pacific Islands Biosphere Reserve, protecting 21 islands, including the San Benito Archipelago, and 97 islets in the Mexican Pacific.

Stone Works Valuation within Immovable Cultural Heritage Monuments Restoration

Historic buildings and their stone parts represent both specific functional architectural features of constructions and important aspects of the cultural heritage. They provide important and valuable proof of development, style, and architecture, level of decorative art, and material processing techniques. However, these historic buildings need restoration so that their legacy can be preserved for future generations. The quality of restoration work tends to be closely related to work price. At present, however, prices for the restoration of stone parts of historic buildings are determined intuitively, based on their complexity, uniqueness, and specificity of restoration work. The valuation of restoration work is therefore carried out mainly by the private sector, based on the experience of individual budgeters and restorers. Due to the fact that the limits of the maximum and minimum scope of individual actions are not set, incorrect valuation can occur, which, in the case of subsequent implementation, may damage, or even in fact damages, the restoration activity as such. Based on this, the article deals with valuation of stone works restoration in real historic structures. It introduces and describes the proposal for systematic classification of these types of work, the procedure for setting standards for time units and consequently the proposal of formula structure for calculating costs and prices. The aim of the article is to introduce the use of standardised procedures for pricing of stone works restoration and thereby create a comparative and cost bases in order to make a qualified choice of restoration specialists.

Optimal Planning of the Mobile Cargo Ropeway Repair Strategy

The focus of this research is to increase the reliability of mobile cargo ropeways formed by autonomous self-propelled transport units. The article deals with the development of a method for forming an effective technical and economic strategy for the restoration during planned repairs of those structural elements of transport units that can lead to critical failures of the ropeway. The method involves predicting the kinetics of the probability of failure-free operation of the ropeway during the entire life of its operation on the basis of predicting the failure-free operation of key elements of the transport units, the failure of which leads to an emergency disruption of the ropeway. In the process of integrating the system of Chapman-Kolmogorov differential equations, its periodic reformation is performed at the time of planned repairs, which allows us to take into account the need for a discrete change in the probability of failure-free operation of the restored structural elements. As a criterion for the optimality of the repairs strategy, the condition for obtaining the minimum total cost of repairs is used, while ensuring the average probability of failure-free operation. The formation of such an optimal strategy includes planning the schedules, number, time points, volume and cost of restoration work. The effectiveness of the repair strategy is determined by the total number of planned repairs and the minimum permissible probability of critical failure of structural elements. Conditions have been established under which further improvement of the level of ropeway reliability becomes an economically unprofitable task.