Russian journal of transport engineering最新文献

{"title":"The use of gravel crushing siftings sands for the production of cast emulsion-mineral mixtures «Slarri Sil»","authors":"A. Parfenov, Yury Vakulchik, Vladimir Yarmolinskiy","doi":"10.15862/01sats123","DOIUrl":"https://doi.org/10.15862/01sats123","url":null,"abstract":"In the article, the authors present the main use results of mineral materials from local open cast mines for the cast emulsion-mineral mixtures making «Slarri Sil» for the protective wearing course installation for asphalt concrete pavements. The production of cast emulsion-mineral mixtures «Slarri Sil» using sand sifting from crushing local gravel materials was carried out on regional category III highways (according to traffic intensity) of the Amur Federal Highway passing through the Amur Region.\u0000\u0000In accordance with the requirements for mineral materials for the production of cast emulsion-mineral mixtures «Slarri Sil», it was ruled to use the sandy fraction of the stone crushing sifting products of igneous rocks in accordance with National State Standard 8736 with the following properties quality indicators: strength grade greater than or equal to 1200, abrasion grade greater than or equal to I-1, frost resistance grade greater than or equal to F50. Due to the limited number of deposits with siftings for crushing dense rocks and the length of regional highways in the Amur Region, deposits use for the production of cast emulsion-mineral mixtures throughout the entire route make the construction of wear layers unprofitable.\u0000\u0000The research objective is the local sand and gravel mix of the Zeya and Bureya rivers for the production of Slurry Seal type cast emulsion-mineral mixtures. The authors present the results of determining the physical and mechanical parameters and grain compositions of sands from siftings of crushing sand and gravel mix and rock for protective wear layers of asphalt concrete pavements. The results of determining the adhesion of the binder with the mineral part of cast emulsion-mineral mixtures «Slarri Sil» on various sands of crushing siftings are presented. The results of testing sands from siftings of crushing gravel and siftings of igneous rocks for wet abrasion are shown.\u0000\u0000The results of experimental studies made it possible to substantiate the use of sand from gravel crushing siftings for the construction of a protective wear layer for asphalt concrete pavement made of cast emulsion-mineral mixtures type «Slarri Sil» on the roads of the Amur Region, including federal ones.\u0000\u0000The obtained results were used to prepare the standard of the organization company standard — closed stock corporation «Asfalt» — 001-2012 «Production of works on the installation of protective wear layers for asphalt concrete pavements from cast emulsion-mineral mixtures of the Slurry Seal type».","PeriodicalId":145434,"journal":{"name":"Russian journal of transport engineering","volume":"149 2","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114015310","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Substantiation of rational design factors of a metropolitan railway station without side railway platforms","authors":"Evgenii Shaposhnikov, Yuri Frolov","doi":"10.15862/05sats123","DOIUrl":"https://doi.org/10.15862/05sats123","url":null,"abstract":"This article presents the results of a study on the stress-strain state of a metropolitan railway station structure without side railway platforms during the construction of the upper arch of the middle station tunnel using in-situ reinforced concrete. The study was conducted using a systematic approach methodology based on a full factorial experiment plan, with subsequent processing of the calculation results using mathematical statistical methods and regression analysis to create a probabilistic-statistical model. The initial data for the analysis were obtained through numerical analysis using mathematical models and the finite element method in the Midas GTS NX program.\u0000\u0000Within the framework of the study, the design parameters of the metropolitan railway station that had the greatest impact on the stress-strain state of the station structure and the surrounding soil mass were identified. A multifactorial experiment was conducted based on the obtained data, involving the mathematical modeling of the «station lining — soil massif» system using the finite element method. The results of the modeling allowed for the assessment of the influence of the tunnel casing design factors on the stress-strain state of the «station lining — soil mass» system.\u0000\u0000Based on the results of the regression analysis, patterns of influence on the stress-strain state of the «station lining — soil mass» system were revealed. Relationships for determining the rational design factors of a metropolitan railway station without side railway platforms during the construction of the upper arch of the middle station tunnel using in-situ reinforced concrete were obtained, forming the basis of a probabilistic-statistical model of the system.\u0000\u0000The developed probabilistic-statistical model enables the prediction of the static performance of the metropolitan railway station structure without side railway platforms, and provides substantiation for the rational parameters of the station tunnel casing structural elements in the engineering-geological conditions of St. Petersburg.","PeriodicalId":145434,"journal":{"name":"Russian journal of transport engineering","volume":"31 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123689118","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"What hinders the training of specialists in the construction and operation of road bridges in modern conditions","authors":"I. Ovchinnikov, S. Valiev, I. Ovchinnikov","doi":"10.15862/03sats123","DOIUrl":"https://doi.org/10.15862/03sats123","url":null,"abstract":"The issue of training bridge engineers in universities in the Russian Federation is being addressed. It has been noted that there has been a decline in the education of bridge building in Russian universities, particularly in the northwestern, southern, and Trans-Baikal regions bordering the Pacific Ocean. Attention is drawn to the fact that the proposed draft concept for road education development until 2035 has not yet been approved by the Ministry of Science and Higher Education of the Russian Federation, which leads to questions about how universities with different affiliations will interact and a lack of supporting legal documents. The draft also lacks information about undergraduate and graduate programs. The quality of the staff in the graduation departments of universities is also low, with the salaries of teaching staff nearly two times lower than the median salary of road workers. Acquiring the titles of associate professor and professor requires a significant amount of time and effort. The number of teaching staff is determined based on the number of students, not the workload, which leads to universities retaining weaker students. Graduate school scholarships are also very low, and most graduate students work, which results in delays in defending dissertations and an unwillingness to stay in the department. The high workload and lack of incentives also discourage writing books and manuals, especially given the current advancements in bridge building. For regional universities to be effectively operated and developed, three conditions must be met: availability of funding, competent leadership, and talented personnel, which are currently lacking. This is why scientific research is not being conducted in universities, especially since Rosavtodor cannot fund fundamental or exploratory research. The article concludes by discussing the experience of training highly qualified specialists at Tyumen Industrial University in collaboration with Mostostroy-11 Joint-Stock Company. The organization of the educational process and the approximate topics of final qualification works are described. All undergraduates conduct patent searches and use patents in developing their master’s theses. The results of their research are published in journals listed by the Higher Attestation Commission.","PeriodicalId":145434,"journal":{"name":"Russian journal of transport engineering","volume":"10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134115850","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Buildings and tunnel structures protection from excess sedimentary deformations in the area of foundation pits construction influence","authors":"Aleksei Kharchenko, Aleksei Kuneevskii, A. Piskunov, I. Kharchenko, E. Pestryakova, Evgeny Mazur, N. Telyatnikova, S. Nemtsova","doi":"10.15862/01sats422","DOIUrl":"https://doi.org/10.15862/01sats422","url":null,"abstract":"The article discusses the process of performing construction and installation work on the foundation pits construction near the existing metropolitan railway tunnels in dense urban areas. The authors consider one of the most effective ways to reduce the negative impact of excavation on two existing single-track tunnels — compensation grouting.\u0000\u0000Compensation grouting is performed to ensure the safety and operational reliability of existing metropolitan railway facilities located in the area of influence of objects under construction, in the case considered by the authors, in the area of influence of the foundation pit being constructed. The article outlines the main provisions for the implementation of drill and injects work.\u0000\u0000The technological process of work performance based on compensation grouting is capable of ensuring the almost complete absence of sediment during the operation of tunnels during the construction of the excavation. Preservation of tunnels in the planned — high-altitude position is carried out based on monitoring the state of the calculated level of pre-stress in the soil volume, which is located between the tunnel and the excavation fence.\u0000\u0000The authors describe the design and technological features of the use of compensation grouting to ensure the metropolitan railway tunnels’ operational reliability, provide a calculation justification for the main technological parameters, create design schemes, present the results of the calculation in the form of tables, and describe the technology for performing work. The results analysis was performed, for which the values of the prestress in the soil were used, as well as the possible movements of the rail tracks in the distillation tunnels during the excavation under the compensation grouting protection.\u0000\u0000The design solutions proposed by the authors, based on the compensation grouting technology to create preliminary stress in the soil, make it possible to ensure the maintenance of the operating regime of tunnel structures near the objects under construction.","PeriodicalId":145434,"journal":{"name":"Russian journal of transport engineering","volume":"48 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124804407","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Analysis of variables affecting the change in the coefficient of clay soils’ moisture conductivity","authors":"A. Sukhorukov, Mariya Badina, V. Churilin, A. Burlutsky, Vitaliy Sivolap","doi":"10.15862/08sats422","DOIUrl":"https://doi.org/10.15862/08sats422","url":null,"abstract":"The paper analyzes studies to determine the coefficient of soil moisture conductivity, conducted by various authors, while it is established that the humidity and density of clay soil have a significant impact on its value. Methods for determining soil moisture conductivity are considered. The study’s purpose is stated, which consists in establishing the influence of variables on the change in the coefficient of clay soil moisture conductivity used for the construction of the earth roadbed in Western Siberia.\u0000\u0000The article considers the key issues of preparing and conducting the experimental part of the study. To set up the experiment, a full factorial experiment model of second-order rotatable planning was chosen. For the experiment, the soil was selected, the selection of which was made from the working layer of the Tobolsk — Tara — Tomsk highway earth roadbed at the Tara — Sedelnikovo section in the Omsk region.\u0000\u0000The authors conducted obtained research results processing by mathematical statistics methods. It has been established that the moisture conductivity values and the moisture flow intensity are slightly affected by the variable «initial humidity», the variables «mass of water, soil density, water level, total moisture capacity, moistening time» have the greatest influence.\u0000\u0000The factor analysis of the obtained results showed that the test procedure for determining the coefficient of moisture conductivity according to Sectoral Highway Regulations 218.046-01 in the PKFG-F device evaluates the moisture transfer in the soil of capillary moisture with the effect of water column pressure. The studies carried out in the work indicate a noticeable influence of the variable «mass of water» and a slight influence of the variable «initial moisture», which may indicate that the film mechanism of moisture migration is not taken into account when testing the soil under study in the PKVG-Futurum device.\u0000\u0000The article was written based on the author’s dissertation research on the topic “Justification of the regional calculated values of the clay soils characteristics for the pavement design in Western Siberia” (Siberian Transport University, Novosibirsk, 2017) in terms of using the experiment results to determine the moisture conductivity coefficient.","PeriodicalId":145434,"journal":{"name":"Russian journal of transport engineering","volume":"6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121707297","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"The lasting quality of road bridges steel-reinforced concrete superstructures on the way to renovation","authors":"I. Belutsky, I. Lazarev","doi":"10.15862/05sats422","DOIUrl":"https://doi.org/10.15862/05sats422","url":null,"abstract":"The article presents constructive technological aspects of the reconstruction of steel-reinforced concrete superstructures of road bridges, based on projects developed by the «Bridges and Foundation Engineering» department, currently known as «Roads». These projects have been implemented on actual transportation infrastructure objects in the Far East region. The article provides data reflecting the condition of the reconstructed superstructures in terms of defects in the reinforced concrete slab of the passage, along with an analysis of these defects. It also presents fundamental considerations regarding measures aimed at ensuring the stability of beams during the reconstruction process.\u0000\u0000The article provides data on the years of construction, repair, and reconstruction of bridge structures, which can be used to draw conclusions about the service life of superstructures, taking into account the reconstruction measures implemented. The effectiveness of the proposed constructive measures is also demonstrated, as they extend the operational capacity and service life of the superstructure.\u0000\u0000The technical condition analysis of steel-reinforced concrete bridges focuses on improving the structural and technological solutions of the project, such as modernizing connecting elements and replacing worn-out slabs with new reinforced concrete or orthotropic ones. This approach is contrasted with organizational and technological measures that are part of preventive, planned maintenance work aimed at maintaining the working condition and effectiveness of constructive proposals in restoring consumer properties of steel-reinforced concrete bridges superstructures and bridge structures in general.\u0000\u0000The information presented in the article indicates the effectiveness of technological interventions, as opposed to passive, organizational, and technological measures as part of scheduled preventive work that does not have a significant effect on increasing the load capacity of the superstructure.","PeriodicalId":145434,"journal":{"name":"Russian journal of transport engineering","volume":"33 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130784564","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Influence of the regenerated road concrete mix on the wheel tracking of highways","authors":"Igor Yryshkin","doi":"10.15862/09sats422","DOIUrl":"https://doi.org/10.15862/09sats422","url":null,"abstract":"Intensive wheel tracking on the road structures’ surface is one of the main road industry problems not only in Russia and the Commonwealth of Independent States countries but also in European countries.\u0000\u0000The presence of wheel tracking entails a decrease in both road traffic safety and comfort. It prevents water removal from the roadway surface, which can adversely affect both the coating durability itself and traffic safety, due to the gliding effect possibility, the risk of losing control of the car when leaving or entering the track during a maneuver increases, as well as the costs of maintaining compliance with the regulatory requirements of the road are also increasing, and therefore it represents large financial losses, injures state economy, and also increases the accident rate.\u0000\u0000In this research work, the author considers the causes of the wheel tracking occurrence, ways to deal with it, its types, elimination methods, including recycling technology, and the vectors for choosing methods for studying this issue, the topic of recycling is touched upon, which corresponds to the general state vector, on the protection of the environment, reflects the results of studying foreign experience. The study prioritizes the criteria of comfort, safety, economy, and modernity.\u0000\u0000The author of the research work considers hypothetical conditions under which the wheel tracking percentage on roads with asphalt concrete pavement will decrease.\u0000\u0000Based on the proposed conditions’ effectiveness, it was concluded that it is expedient to use the hot recycling method at the plant and a laboratory justification for this statement was made.","PeriodicalId":145434,"journal":{"name":"Russian journal of transport engineering","volume":"64 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132834691","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Study of the static and endurance strength of reinforced concrete specimens loaded with the account of the characteristics arising in the process of aircraft takeoff and landing operations on airfield pavements","authors":"A. Sklyarov, Anastasiya Vartazarova, Anton Martynov","doi":"10.15862/02sats422","DOIUrl":"https://doi.org/10.15862/02sats422","url":null,"abstract":"The article shows that the impact of aircraft with multi-wheel bearings on airfield pavements is a cyclical pattern, as a result, constant sign and alternating stresses arise in the material. The results of cyclic loading parameters calculations of coatings under the influence of aircraft with multi-wheeled bearings (load cycle asymmetry coefficient, values of the maximum and minimum stresses of the loading cycle), performed using the SCAD software-computer complex, which implements the finite element method in the form of the displacement method, are presented. The necessity of carrying out tests to determine the endurance strength of reinforced concrete under various loading conditions for more complete consideration in determining the operating modes of airfield pavements is shown, and the loading parameters of reinforced concrete specimens during their endurance tests are determined. A general view and a layout diagram of an experimental setup for determining the static and endurance strength of large-sized cement concrete samples are presented. A technique for determining the static strength of reinforced concrete samples is presented, including the determination of the criterion for their destruction (appearance of fluidity in the reinforcement of the sample), the applied strain-measuring, ultrasonic and acoustic methods for determining the stresses magnitude and strains in cement concrete and structural reinforcement, the dynamics of changes in the measured parameters on one of the samples is shown. The results of the reinforced concrete samples fatigue tests with dimensions of 1500x400x200 mm under various loading conditions are presented, with reference to which regression equations were obtained to determine the number of loading cycles to failure, and endurance coefficients were obtained based on 106 loading cycles. Based on the carried out studies, conclusions are drawn, and the need to develop practical recommendations for taking into account the cyclic nature of the load impact from aircraft and the fatigue strength of cement concrete when assigning operating modes for airfield pavements is indicated.","PeriodicalId":145434,"journal":{"name":"Russian journal of transport engineering","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130127561","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Laboratory and field studies to ensure the regulatory framework development and the transport facilities’ safety in the wave effect conditions","authors":"G. Tlyavlina","doi":"10.15862/10sats422","DOIUrl":"https://doi.org/10.15862/10sats422","url":null,"abstract":"This article is part of the author’s dissertation research in the field of scientific substantiation of the development and improvement of the regulatory framework for ensuring the safety of transport facilities in conditions of wave effect.\u0000\u0000The article deals with such transport structure elements as bridge piers and railway roadbeds, which are located on the shores of the seas and are exposed to wave effects, and, as a result, need to be protected.\u0000\u0000The relevance of the issue is due to the fact that an insufficient justification degree of design solutions for engineering protection structures can lead to environmental disasters and large financial losses. Usually, competent and strict regulation of the design process and survey work allows for avoiding large financial losses. Regulatory framework development will improve the reliability of transport facilities located in the wave effect zone. At the same time, technical regulations requirements must be substantiated by scientific research.\u0000\u0000The article presents some results of scientific research carried out by the author to ensure the regulatory framework development and the safety of transport facilities in wave effect conditions. The following methods of scientific research were used in the work: field observations and surveys of the coastal zone and engineering protection structures of transport facilities from wave effect and physical (hydraulic) modeling.\u0000\u0000The results of long-term field observations and surveys of the coastal zone and engineering protection structures of the railway roadbed are used: sea wall, protective wave-damping strips, groins, breakwaters, etc. at the Tuapse-Adler sections of the North Caucasian Railway and Korsakov-Nogliki of the Far Eastern Railway.\u0000\u0000The author presents laboratory studies results of the wave protection structures operation (protective slopes, wave-damping strips with retaining structures, etc.), which were carried out by the physical (hydraulic) modeling method in wave pools and flumes.\u0000\u0000Provides information about the regulations developed with the author’s participation based on the research. The expected efficiency from the practical application of the developed normative documents is described.","PeriodicalId":145434,"journal":{"name":"Russian journal of transport engineering","volume":"22 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131335545","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Calculation-theoretical justification of the compensation grouting parameters for the metropolitan railway protection from sedimentary deformations","authors":"S. Koval, E. Pestryakova, A. Piskunov, Aleksandr Smirnov, Aleksei Kharchenko, A. Sonin, Daniil Idiatulin, I. Kharchenko","doi":"10.15862/01sats322","DOIUrl":"https://doi.org/10.15862/01sats322","url":null,"abstract":"An increase in the volume and scale of underground space development, including the construction of metropolitan railway facilities in large cities, is accompanied by a significant impact on the surrounding urban development, which requires the development and implementation of a set of special measures to protect buildings and structures from excess deformations. At the same time, numerous above-ground and underground structures are involved in the area of influence of the construction, including existing metropolitan railway facilities, as well as residential buildings and above-ground transport facilities.\u0000\u0000Сurrently, one of the most effective methods that provide reliable facilities protection from sedimentary deformations is the compensation grouting method.\u0000\u0000The article outlines the theoretical foundations for the use of compensation grouting technology to protect buildings and structures from excess sedimentary deformations during the construction of transport infrastructure facilities in dense urban areas.\u0000\u0000A mathematical model has been developed that corresponds to the actual geometry of the computational area of the metropolitan railway lobby with a soil base, the actual physical and mechanical characteristics of the materials of its structures, and the soil mass.\u0000\u0000The article presents the computer modeling results, with its help determined volumes, pressure, sequence, and injection sites. Based on calculated data, the duration of the special solution compensatory injection was determined to maintain a stable position of the foundations of the metropolitan railway escalator tunnels by forming the calculated stress-strain state of the soil mass at the ground slab base of the structure to provide a given preventive lift, the dependences of the lift deformations on pressure and the grouting volumes of special mixtures were established.\u0000\u0000Based on the obtained data, a procedure was developed for the production of work to maintain the planned-altitude position of metropolitan railway facilities at all construction stages and operation of the multifunctional complex.","PeriodicalId":145434,"journal":{"name":"Russian journal of transport engineering","volume":"6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131596281","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}