The transport facilities construction in the Arctic zone regions of the Russian Federation is a complex engineering task. This complexity is caused not only by a competent choice of structural and technological solutions for improving the foundation soils but also by rational organizational and technological solutions, which in turn affect the timing of the transport facility construction, its cost, and construction efficiency in the regions of the Far North of the Russian Federation. During construction in the permafrost zone, building materials often require delivery to the construction site using rail, road, and water transport. Construction in difficult climatic conditions implies the use of new work execution technologies using modern equipment to ensure the reliability and durability of structures under construction. Competent work organization and modern technologies minimize the construction time, but at the same time increase construction costs. To reduce the work time, the article presents the soil basement strengthening technology with the vertical shaft of gravel chippings. The authors present the work scope on the soil basement strengthening with vertical shafts of gravel chippings during the construction of the embankment according to the II design principle (with the allowance of thawing) and the technological sequence of its implementation. A work execution plan has been developed for the implementation of a double-beam organizational chart for strengthening the soil basement with vertical shafts of gravel chippings at the Obskaya-Salekhard section, picket 01+50-picket 06+50 of the new railway line «Northern latitudinal way». The needs for machines and mechanisms used in the implementation of the proposed technology are shown. Recommendations are given on the most favorable period for the work execution.
{"title":"Organizational and technological solutions for strengthening the earth roadbed in the permafrost zone","authors":"T. Shepitko, I. Artyushenko, A. Zaytsev","doi":"10.15862/03sats222","DOIUrl":"https://doi.org/10.15862/03sats222","url":null,"abstract":"The transport facilities construction in the Arctic zone regions of the Russian Federation is a complex engineering task. This complexity is caused not only by a competent choice of structural and technological solutions for improving the foundation soils but also by rational organizational and technological solutions, which in turn affect the timing of the transport facility construction, its cost, and construction efficiency in the regions of the Far North of the Russian Federation. During construction in the permafrost zone, building materials often require delivery to the construction site using rail, road, and water transport.\u0000\u0000Construction in difficult climatic conditions implies the use of new work execution technologies using modern equipment to ensure the reliability and durability of structures under construction. Competent work organization and modern technologies minimize the construction time, but at the same time increase construction costs.\u0000\u0000To reduce the work time, the article presents the soil basement strengthening technology with the vertical shaft of gravel chippings.\u0000\u0000The authors present the work scope on the soil basement strengthening with vertical shafts of gravel chippings during the construction of the embankment according to the II design principle (with the allowance of thawing) and the technological sequence of its implementation. A work execution plan has been developed for the implementation of a double-beam organizational chart for strengthening the soil basement with vertical shafts of gravel chippings at the Obskaya-Salekhard section, picket 01+50-picket 06+50 of the new railway line «Northern latitudinal way».\u0000\u0000The needs for machines and mechanisms used in the implementation of the proposed technology are shown. Recommendations are given on the most favorable period for the work execution.","PeriodicalId":145434,"journal":{"name":"Russian journal of transport engineering","volume":"72 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126428050","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}
Improving the environmental situation and obtaining hydration hardening composites with new properties for various operating conditions is possible with the use of secondary resources. The work is dedicated to the criteria study for assessing the hydration hardening binders impact on the environment. The methodological approach to the choice of a functional unit for a carbon footprint comparative assessment of cement is substantiated in the work. The study results of the properties that determine the concrete durability in transport construction and the aggressive environment of livestock farms are presented. Concrete based on Portland cement has the least resistance in the aggressive environment of livestock complexes, the cross-breaking strength of which is almost twice after 150 days of curing. Marginally better resistance coefficient indicators in an aggressive environment have binder compositions based on portland blast furnace slag cement and technogenic raw materials. At the same time, if the process of degradation and decrease in the strength properties of the binder samples on Portland cement is progressive until they are completely destroyed, then in the binder samples on modified technogenic raw materials, the strength characteristics stabilize with time, which indicates the decaying nature of the corrosion process. The investigated slag-alkaline concrete satisfies the requirements for paving concrete and concretes for under-rail structures, since compressive strength and frost resistance were 70 MPa and F600 for granulated blast-furnace slag with a basicity modulus of 0.8; 78 MPa and F700 for granulated blast-furnace slag with alkali-lime index 0.9. These concretes had comparable characteristics to concrete on Portland cement CEM 52.5, for which the values were 60 MPa and F600. The presented results contribute to the development of an ecological approach to making design decisions in construction.
{"title":"Industrial waste products based concrete: environmental impact assessment","authors":"O. Smirnova, L. Kazanskaya","doi":"10.15862/05sats222","DOIUrl":"https://doi.org/10.15862/05sats222","url":null,"abstract":"Improving the environmental situation and obtaining hydration hardening composites with new properties for various operating conditions is possible with the use of secondary resources. The work is dedicated to the criteria study for assessing the hydration hardening binders impact on the environment. The methodological approach to the choice of a functional unit for a carbon footprint comparative assessment of cement is substantiated in the work. The study results of the properties that determine the concrete durability in transport construction and the aggressive environment of livestock farms are presented. Concrete based on Portland cement has the least resistance in the aggressive environment of livestock complexes, the cross-breaking strength of which is almost twice after 150 days of curing. Marginally better resistance coefficient indicators in an aggressive environment have binder compositions based on portland blast furnace slag cement and technogenic raw materials. At the same time, if the process of degradation and decrease in the strength properties of the binder samples on Portland cement is progressive until they are completely destroyed, then in the binder samples on modified technogenic raw materials, the strength characteristics stabilize with time, which indicates the decaying nature of the corrosion process. The investigated slag-alkaline concrete satisfies the requirements for paving concrete and concretes for under-rail structures, since compressive strength and frost resistance were 70 MPa and F600 for granulated blast-furnace slag with a basicity modulus of 0.8; 78 MPa and F700 for granulated blast-furnace slag with alkali-lime index 0.9. These concretes had comparable characteristics to concrete on Portland cement CEM 52.5, for which the values were 60 MPa and F600. The presented results contribute to the development of an ecological approach to making design decisions in construction.","PeriodicalId":145434,"journal":{"name":"Russian journal of transport engineering","volume":"2008 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131415841","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}
The evenness of the road pavement is one of the main road safety factors. Along with the automobile boom, to the numerous problems that arise on our roads, another one has been added — intensive wear-out, leading to the tracing ruts formation, which negatively affects road safety, the tracing rut causes accidents, and with quite serious consequences. In recent decades, the wheel track rutting problem on road pavement has come to the fore among all pavement defects. This type of deformation reduces the traffic safety level on roads, negatively affects road durability, and also causes significant damage to the country's economy. Wheel track rutting on roads is caused by numerous and diverse factors associated with operational loads, natural and climatic influences, and surface wear-out peculiarities by vehicles. The article defines the main types (forms) of the wheel track rutting formation of roads. It has also been established that under conditions of an increase in the traffic load intensity and magnitude, an increase in the wheel tracking size is observed, up to irreversible deformations of the pavement structural layers. It is necessary to study the wheel track rutting problems for a better understanding of the destruction process and a more accurate constructive solutions design for highways. Identification of the formation reasons and analysis of the wheel tracking formation causes and mechanisms is a necessary tool for improving the preventing methods and combating the considered defect in road pavements. The tracing ruts appearance on the roads leads to a decrease in the efficiency of the financial resources use allocated to the road industry, since it becomes necessary to repair the road surface much more often than it is provided for by regulatory documents.
{"title":"Wheel track rutting problems on highways","authors":"Denis Kovalev, Regina Shaykhutdinova","doi":"10.15862/10sats122","DOIUrl":"https://doi.org/10.15862/10sats122","url":null,"abstract":"The evenness of the road pavement is one of the main road safety factors. Along with the automobile boom, to the numerous problems that arise on our roads, another one has been added — intensive wear-out, leading to the tracing ruts formation, which negatively affects road safety, the tracing rut causes accidents, and with quite serious consequences. In recent decades, the wheel track rutting problem on road pavement has come to the fore among all pavement defects. This type of deformation reduces the traffic safety level on roads, negatively affects road durability, and also causes significant damage to the country's economy. Wheel track rutting on roads is caused by numerous and diverse factors associated with operational loads, natural and climatic influences, and surface wear-out peculiarities by vehicles.\u0000The article defines the main types (forms) of the wheel track rutting formation of roads. It has also been established that under conditions of an increase in the traffic load intensity and magnitude, an increase in the wheel tracking size is observed, up to irreversible deformations of the pavement structural layers. It is necessary to study the wheel track rutting problems for a better understanding of the destruction process and a more accurate constructive solutions design for highways. Identification of the formation reasons and analysis of the wheel tracking formation causes and mechanisms is a necessary tool for improving the preventing methods and combating the considered defect in road pavements. The tracing ruts appearance on the roads leads to a decrease in the efficiency of the financial resources use allocated to the road industry, since it becomes necessary to repair the road surface much more often than it is provided for by regulatory documents.","PeriodicalId":145434,"journal":{"name":"Russian journal of transport engineering","volume":"14 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125310526","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}
The article considers the developing possibilities of adaptive digital technological regulation for the railway track facility construction. Railway construction as a complex dynamic system requires certain resources for its maintenance. At the same time, it is characterized by the use of new, more advanced design solutions, materials, and technologies, the performers' specialization development, and a large number of participants in the technological process associated with this. Under these conditions, effective control over the job practices performed during the railway track facilities construction is of decisive importance. This can be achieved by improving the existing engineering system and technical support for railway construction through the subsystem introduction for engineering and intellectual support of technological processes for the railway facilities construction. One of the tasks of engineering and intellectual support of technological processes is the effective use of automated systems, including those with artificial intelligence elements. Their creation and implementation are focused on achieving a single endresult: a finished railway track facility of the appropriate functional purpose within the established time frame, planned cost and labor costs and also meeting modern safety requirements throughout the entire operation period. As part of the methodology formation for engineering and intellectual support of railway construction technological processes, the structure of an adaptive digital technological regulation was developed - a digital regulatory document that defines the norms and rules for conducting the technological process of building a railway facility. A distinctive feature of the adaptive digital technological regulations is the possibility of its adjustment in an automated mode. The purpose of the adjustment is to adapt the technological process to the changing working conditions and the resource equipment of construction (contractor) organizations. At the same time, the information contained in the regulations can be transferred to 4D design and construction project management systems. Based on the theoretical study results, the article presents practical aspects of the automated development of adaptive digital technological regulations on the example of the flooded railway roadbed construction. The results presented in the article were obtained in the dissertation course research carried out by the author.
{"title":"Adaptive digital technological regulations development for engineering and intellectual support for the railway track facilities construction","authors":"A. Polyanskiy","doi":"10.15862/03sats122","DOIUrl":"https://doi.org/10.15862/03sats122","url":null,"abstract":"The article considers the developing possibilities of adaptive digital technological regulation for the railway track facility construction. Railway construction as a complex dynamic system requires certain resources for its maintenance. At the same time, it is characterized by the use of new, more advanced design solutions, materials, and technologies, the performers' specialization development, and a large number of participants in the technological process associated with this. Under these conditions, effective control over the job practices performed during the railway track facilities construction is of decisive importance. This can be achieved by improving the existing engineering system and technical support for railway construction through the subsystem introduction for engineering and intellectual support of technological processes for the railway facilities construction. One of the tasks of engineering and intellectual support of technological processes is the effective use of automated systems, including those with artificial intelligence elements. Their creation and implementation are focused on achieving a single endresult: a finished railway track facility of the appropriate functional purpose within the established time frame, planned cost and labor costs and also meeting modern safety requirements throughout the entire operation period. As part of the methodology formation for engineering and intellectual support of railway construction technological processes, the structure of an adaptive digital technological regulation was developed - a digital regulatory document that defines the norms and rules for conducting the technological process of building a railway facility. A distinctive feature of the adaptive digital technological regulations is the possibility of its adjustment in an automated mode. The purpose of the adjustment is to adapt the technological process to the changing working conditions and the resource equipment of construction (contractor) organizations. At the same time, the information contained in the regulations can be transferred to 4D design and construction project management systems.\u0000Based on the theoretical study results, the article presents practical aspects of the automated development of adaptive digital technological regulations on the example of the flooded railway roadbed construction.\u0000The results presented in the article were obtained in the dissertation course research carried out by the author.","PeriodicalId":145434,"journal":{"name":"Russian journal of transport engineering","volume":"705 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116962858","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}
The article is dedicated to the actual dynamic impact study of rolling stock on urban bridges. The requirements for recording the dynamic impact specified in domestic and foreign regulatory documents are considered. Using a mobile measuring complex, the results of which determine the natural frequencies of vertical, horizontal transverse, and horizontal longitudinal vibrations. The technique used in the experiment allows us to obtain initial data for the dynamic calculation of structures, to clarify the real rolling stock dynamics depending on the state of the rail track on the bridge. Urban rolling stock is a relevant and necessary type of public transport that meets modern city requirements. The bridge crossings construction will ensure the connection of the urban areas separated by obstacles into a single network. When designing such structures, it is important to take into account the effects of actual dynamic coercitive forces. The dynamics study allows, on the one hand, to reasonably set the dynamic loads impact on bridges, on the other hand, to diagnose the structures state by dynamic parameters. In this work, using a specialized mobile measuring complex, the authors measured the oscillation parameters on moving vehicles. As a conducted experimental studies result, a methodology for determining the dynamic characteristics of a moving load and directly urban bridges has been demonstrated. As a result of the conducted experimental studies, it can be concluded that the proposed method allows obtaining initial data for the dynamic analysis of structures for the transport load. In addition, fixing the transport load dynamic impact during operation allows you to clarify the real rolling stock dynamics, depending on the state of the rail track on the bridge.
{"title":"Urban bridges studies on dynamic impacts from urban rolling stock","authors":"Natalya Khamidullina","doi":"10.15862/02sats122","DOIUrl":"https://doi.org/10.15862/02sats122","url":null,"abstract":"The article is dedicated to the actual dynamic impact study of rolling stock on urban bridges. The requirements for recording the dynamic impact specified in domestic and foreign regulatory documents are considered. Using a mobile measuring complex, the results of which determine the natural frequencies of vertical, horizontal transverse, and horizontal longitudinal vibrations. The technique used in the experiment allows us to obtain initial data for the dynamic calculation of structures, to clarify the real rolling stock dynamics depending on the state of the rail track on the bridge. Urban rolling stock is a relevant and necessary type of public transport that meets modern city requirements. The bridge crossings construction will ensure the connection of the urban areas separated by obstacles into a single network. When designing such structures, it is important to take into account the effects of actual dynamic coercitive forces. The dynamics study allows, on the one hand, to reasonably set the dynamic loads impact on bridges, on the other hand, to diagnose the structures state by dynamic parameters. In this work, using a specialized mobile measuring complex, the authors measured the oscillation parameters on moving vehicles. As a conducted experimental studies result, a methodology for determining the dynamic characteristics of a moving load and directly urban bridges has been demonstrated. As a result of the conducted experimental studies, it can be concluded that the proposed method allows obtaining initial data for the dynamic analysis of structures for the transport load. In addition, fixing the transport load dynamic impact during operation allows you to clarify the real rolling stock dynamics, depending on the state of the rail track on the bridge.","PeriodicalId":145434,"journal":{"name":"Russian journal of transport engineering","volume":"19 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124891088","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}
To make effective management decisions in the safety measures field of navigational hydraulic structures, versatile information support is required, which is implemented, including by maintaining a database on them. This achieves the industry scale formation of a reliable set of information on various reliability and safety operational issues of navigational hydraulic structures, ensuring timely detection (forecasting) and prevention of crisis situations on them. The industry database includes information on pressure water transport hydraulic structures subject to declaration in accordance with the legislation on the safety of the hydraulic structure. The automated navigational hydraulic structures database is an information and analytical complex operating on a computer technology basis, which allows you to accumulate and store a variety of information, correct it, process, select and analyze, including retrospective, etc. The author of the article notes that for the implementation of the state policy in the safety measures field of industrial facilities, it is necessary to improve the work organization in the field of timely detection and prevention of man-made and natural threats, the technical basis for monitoring, which is the most important condition for increasing the reliability and efficiency of obtaining comprehensive information characterizing its safety state. Based on the processing and analyzing complex information results, the article characterizes the state of navigational hydraulic structures, provides suggestions and recommendations aimed at ensuring their safe operation for the purpose of prompt response, implementation of corrective actions in the inter-declaration period, as well as for planning for the future, an assessment is made the effect of repair and restoration work performed at hydraulic structures at different times.
{"title":"On the maintenance experience of navigational hydraulic structures database","authors":"Yu. M. Kolesnikov","doi":"10.15862/01sats122","DOIUrl":"https://doi.org/10.15862/01sats122","url":null,"abstract":"To make effective management decisions in the safety measures field of navigational hydraulic structures, versatile information support is required, which is implemented, including by maintaining a database on them. This achieves the industry scale formation of a reliable set of information on various reliability and safety operational issues of navigational hydraulic structures, ensuring timely detection (forecasting) and prevention of crisis situations on them. The industry database includes information on pressure water transport hydraulic structures subject to declaration in accordance with the legislation on the safety of the hydraulic structure. The automated navigational hydraulic structures database is an information and analytical complex operating on a computer technology basis, which allows you to accumulate and store a variety of information, correct it, process, select and analyze, including retrospective, etc. The author of the article notes that for the implementation of the state policy in the safety measures field of industrial facilities, it is necessary to improve the work organization in the field of timely detection and prevention of man-made and natural threats, the technical basis for monitoring, which is the most important condition for increasing the reliability and efficiency of obtaining comprehensive information characterizing its safety state. Based on the processing and analyzing complex information results, the article characterizes the state of navigational hydraulic structures, provides suggestions and recommendations aimed at ensuring their safe operation for the purpose of prompt response, implementation of corrective actions in the inter-declaration period, as well as for planning for the future, an assessment is made the effect of repair and restoration work performed at hydraulic structures at different times.","PeriodicalId":145434,"journal":{"name":"Russian journal of transport engineering","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129496535","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}
In the article, the author published the full-scale experiment results on an existing steel-reinforced concrete road bridge, carried out to determine the actual parameters of the operation regime of the interconnection elements — flexible pin stops. This work was carried out as part of the author's dissertation research in the field of improving methods for testing the elements' endurance of the steel-reinforced concrete superstructures interconnection and is a development of the previously conducted comprehensive comparative analysis of existing models for testing endurance. The article gives a detailed description of the conditions for conducting and methods of a two-stage experiment, which includes short-term and long-term parts, as well as a detailed description used for processing experimental data for each of the stages. Based on the results of the experiment's short-term part, when compared with the results of finite element modeling of the operation of the stops, the possibility of using existing computational models to describe the actual model operation was confirmed. Also, within the framework of the short-term part, according to the conducted dynamic tests results with the moving load passage through the threshold, the presence of a significant dynamic component of the resulting forces in the interconnection stops was revealed. During the second long-term part of the experiment, a continuous recording of stresses in the interconnection elements from the passage of an unregulated traffic flow over the bridge was made. The article presents both direct survey data (tensograms) and the results of their further processing in terms of damage accumulation analysis; also, the accumulated damages values from actual traffic loads are compared with the expected values in the calculation according to some design standards. Intermediate conclusions based on the experiment results are formed and directions for future work within the scope of this study are indicated.
{"title":"Operating regime investigational study of steel-reinforced concrete superstructure flexible pin stops of the existing road bridge","authors":"Nikolai Kozak","doi":"10.15862/07sats122","DOIUrl":"https://doi.org/10.15862/07sats122","url":null,"abstract":"In the article, the author published the full-scale experiment results on an existing steel-reinforced concrete road bridge, carried out to determine the actual parameters of the operation regime of the interconnection elements — flexible pin stops. This work was carried out as part of the author's dissertation research in the field of improving methods for testing the elements' endurance of the steel-reinforced concrete superstructures interconnection and is a development of the previously conducted comprehensive comparative analysis of existing models for testing endurance. The article gives a detailed description of the conditions for conducting and methods of a two-stage experiment, which includes short-term and long-term parts, as well as a detailed description used for processing experimental data for each of the stages. Based on the results of the experiment's short-term part, when compared with the results of finite element modeling of the operation of the stops, the possibility of using existing computational models to describe the actual model operation was confirmed. Also, within the framework of the short-term part, according to the conducted dynamic tests results with the moving load passage through the threshold, the presence of a significant dynamic component of the resulting forces in the interconnection stops was revealed. During the second long-term part of the experiment, a continuous recording of stresses in the interconnection elements from the passage of an unregulated traffic flow over the bridge was made. The article presents both direct survey data (tensograms) and the results of their further processing in terms of damage accumulation analysis; also, the accumulated damages values from actual traffic loads are compared with the expected values in the calculation according to some design standards. Intermediate conclusions based on the experiment results are formed and directions for future work within the scope of this study are indicated.","PeriodicalId":145434,"journal":{"name":"Russian journal of transport engineering","volume":" 50","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"113948965","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}
Timeliness. Today financing road development and maintenance is one of the defining issues in ensuring the economic growth of any country since investments in road infrastructure are strategic. There is no doubt that only with the adequate quality road infrastructure, the state can fully use its export and logistics potential. Special significance in the light of the indicated factors gets an effective toolkit for evaluating investment projects for the construction of new and reconstruction of existing roads. This issue acquires critical importance when it comes to the use of budgetary subsidies. The subsidies' cost-effectiveness is known to be influenced by a wide range of factors and various determinants. In this regard, the study's purpose is to consider methods to assess the impact of inaccurate traffic forecasting on the economic efficiency of subsidies. Study's methodological framework. To achieve this goal, a wide range of scientific knowledge tools was used, namely: comparative analysis, deduction, and induction, modeling, forecasting, generalization, systematization. Results. The article describes in detail and highlights the factors influencing the subsidies economic efficiency allocated for road construction. Using the Logical Framework Approach, the risk impact and consequences of inaccurate traffic forecasting on the overall project efficiency and the economic return on allocated subsidies are demonstrated. To carry out specific calculations and implement analytical procedures, the methodology used in the countries of the European Union (EU) is considered, which allows for assessing the impact of the subsidies effectiveness through the payment for the use of the road by various vehicles, the potential savings in transportation time and reduction in the distance of transportation. In addition, an approach is described that takes into account the distribution of project financing between the state and a private investor, as well as the predicted traffic intensity, which together determine the economic effect magnitude received by each of the partners. The particular emphasis within this approach is placed on the need for a clear formalization, categorization, and calculation of all costs associated with the preparation and implementation of the project.
{"title":"Traffic rate forecasting inaccuracy influence on road construction and reconstruction projects' economic efficiency","authors":"K. Mikryukov","doi":"10.15862/04sats122","DOIUrl":"https://doi.org/10.15862/04sats122","url":null,"abstract":"Timeliness. Today financing road development and maintenance is one of the defining issues in ensuring the economic growth of any country since investments in road infrastructure are strategic. There is no doubt that only with the adequate quality road infrastructure, the state can fully use its export and logistics potential. Special significance in the light of the indicated factors gets an effective toolkit for evaluating investment projects for the construction of new and reconstruction of existing roads. This issue acquires critical importance when it comes to the use of budgetary subsidies. The subsidies' cost-effectiveness is known to be influenced by a wide range of factors and various determinants. In this regard, the study's purpose is to consider methods to assess the impact of inaccurate traffic forecasting on the economic efficiency of subsidies. Study's methodological framework. To achieve this goal, a wide range of scientific knowledge tools was used, namely: comparative analysis, deduction, and induction, modeling, forecasting, generalization, systematization. Results. The article describes in detail and highlights the factors influencing the subsidies economic efficiency allocated for road construction. Using the Logical Framework Approach, the risk impact and consequences of inaccurate traffic forecasting on the overall project efficiency and the economic return on allocated subsidies are demonstrated. To carry out specific calculations and implement analytical procedures, the methodology used in the countries of the European Union (EU) is considered, which allows for assessing the impact of the subsidies effectiveness through the payment for the use of the road by various vehicles, the potential savings in transportation time and reduction in the distance of transportation. In addition, an approach is described that takes into account the distribution of project financing between the state and a private investor, as well as the predicted traffic intensity, which together determine the economic effect magnitude received by each of the partners. The particular emphasis within this approach is placed on the need for a clear formalization, categorization, and calculation of all costs associated with the preparation and implementation of the project.","PeriodicalId":145434,"journal":{"name":"Russian journal of transport engineering","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128780188","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}
This article evaluates the work of ice winter roads and ice crossings on the roads of the Far North. An analysis is made of the transport and performance characteristics of seasonal routes and their impact on the transport network and socio-economic development of the Republic of Sakha (Yakutia). Limiting development factors and priority areas for improving the transport network of the Republic of Sakha (Yakutia) and the transport hub of the Arctic zone of the Far Eastern Federal District is identified, which is a strategically important issue in making managerial and geopolitical decisions. The purpose of the study of seasonal traffic routes on roads is to form a database for the subsequent increase in transport accessibility in the regions of the Far North and the formation of a stable, ensuring uninterrupted transport connection in the transport hub of the Arctic zone of the Far Eastern Federal District. The transport link will make it possible to freely pass traffic flows on sections of roads with seasonal communication routes with minimal transport and time costs. The objectives of this study are to assess the operation of ice winter roads and crossings, identify constraints to development and identify priority areas for the development of the transport network. The road network of the Republic of Sakha (Yakutia) is the central transport hub in the Arctic zone of the Far Eastern Federal District with access to neighboring regions (Krasnoyarsk Territory, Irkutsk Region, Amur Region, Magadan Region, Chukotka Autonomous Okrug) through which transit freight and passenger transportation are carried out. The uninterrupted functioning of traffic flows both within the republic and transit flows of neighboring entities in the republic is limited in the off-season, due to seasonal routes of communication. During transitional periods, the movement of vehicles is suspended on approximately 70 % of the roads of the republic. The considered options for the development of the transport network of the Republic of Sakha (Yakutia) and the transport hub of the Far Eastern Federal District should take into account the seasonality of transport links and the specifics of the region. The targets specified in the Strategy for the Development of the Arctic Zone of the Russian Federation and Ensuring National Security until 2035, taking into account the specifics of the region, will achieve the development of trunk and transit roads in the Arctic zone of the Far Eastern Federal District and the Russian Federation as a whole.
{"title":"Ice winter roads and crossings work evaluation in the regions of the Far North","authors":"Sergey Kopylov","doi":"10.15862/09sats122","DOIUrl":"https://doi.org/10.15862/09sats122","url":null,"abstract":"This article evaluates the work of ice winter roads and ice crossings on the roads of the Far North. An analysis is made of the transport and performance characteristics of seasonal routes and their impact on the transport network and socio-economic development of the Republic of Sakha (Yakutia). Limiting development factors and priority areas for improving the transport network of the Republic of Sakha (Yakutia) and the transport hub of the Arctic zone of the Far Eastern Federal District is identified, which is a strategically important issue in making managerial and geopolitical decisions. The purpose of the study of seasonal traffic routes on roads is to form a database for the subsequent increase in transport accessibility in the regions of the Far North and the formation of a stable, ensuring uninterrupted transport connection in the transport hub of the Arctic zone of the Far Eastern Federal District. The transport link will make it possible to freely pass traffic flows on sections of roads with seasonal communication routes with minimal transport and time costs. The objectives of this study are to assess the operation of ice winter roads and crossings, identify constraints to development and identify priority areas for the development of the transport network. The road network of the Republic of Sakha (Yakutia) is the central transport hub in the Arctic zone of the Far Eastern Federal District with access to neighboring regions (Krasnoyarsk Territory, Irkutsk Region, Amur Region, Magadan Region, Chukotka Autonomous Okrug) through which transit freight and passenger transportation are carried out. The uninterrupted functioning of traffic flows both within the republic and transit flows of neighboring entities in the republic is limited in the off-season, due to seasonal routes of communication. During transitional periods, the movement of vehicles is suspended on approximately 70 % of the roads of the republic. The considered options for the development of the transport network of the Republic of Sakha (Yakutia) and the transport hub of the Far Eastern Federal District should take into account the seasonality of transport links and the specifics of the region. The targets specified in the Strategy for the Development of the Arctic Zone of the Russian Federation and Ensuring National Security until 2035, taking into account the specifics of the region, will achieve the development of trunk and transit roads in the Arctic zone of the Far Eastern Federal District and the Russian Federation as a whole.","PeriodicalId":145434,"journal":{"name":"Russian journal of transport engineering","volume":"144 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116379172","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}
The main trends in bridge building are: the implementation of new materials, the assimilation of novel technologies, and the construction time reduction. The new technologies assimilation is often associated with the need to build bridge structures in cramped conditions. Considered by the author balanced lowering method technology corresponds to these trends. The technology was developed at the Vienna Technical University, the main idea is to assemble the supporting elements in a vertical position with subsequent deployment to the design horizontal position. To reduce the weight of the mounted elements, this technology uses thin-walled prestressed precast concrete units. After installing it in the design position, they perform the function of leave-in-place form and are cast in place directly on the construction site. This technology was invented for high pier bridges to eliminate the erection and dismantling of temporary support but has recently been shown to be cost-effective for low pier bridges. The advantage of this method is not only the construction time reduction and the free underbridge clearance presence but also the fact that the braces are not only a mechanism for turning the span into a horizontal position but also allow to reduce the estimated span length. The article discusses the bridge projects across the Lafnitz and Lahnbach rivers in Austria, as well as previous options for bridge projects. Particular emphasis in the work is placed on the bridge construction technology consideration, the main technological stages identification, as well as the performance features of certain works. The author presents recommendations on the application of this construction method.
{"title":"The use of balanced lowering method technology for bridge construction in cramped urban environments","authors":"A. Doronina, S. Valiev","doi":"10.15862/12sats122","DOIUrl":"https://doi.org/10.15862/12sats122","url":null,"abstract":"The main trends in bridge building are: the implementation of new materials, the assimilation of novel technologies, and the construction time reduction. The new technologies assimilation is often associated with the need to build bridge structures in cramped conditions. Considered by the author balanced lowering method technology corresponds to these trends. The technology was developed at the Vienna Technical University, the main idea is to assemble the supporting elements in a vertical position with subsequent deployment to the design horizontal position.\u0000\u0000To reduce the weight of the mounted elements, this technology uses thin-walled prestressed precast concrete units. After installing it in the design position, they perform the function of leave-in-place form and are cast in place directly on the construction site.\u0000\u0000This technology was invented for high pier bridges to eliminate the erection and dismantling of temporary support but has recently been shown to be cost-effective for low pier bridges.\u0000\u0000The advantage of this method is not only the construction time reduction and the free underbridge clearance presence but also the fact that the braces are not only a mechanism for turning the span into a horizontal position but also allow to reduce the estimated span length. The article discusses the bridge projects across the Lafnitz and Lahnbach rivers in Austria, as well as previous options for bridge projects. Particular emphasis in the work is placed on the bridge construction technology consideration, the main technological stages identification, as well as the performance features of certain works. The author presents recommendations on the application of this construction method.","PeriodicalId":145434,"journal":{"name":"Russian journal of transport engineering","volume":"19 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127989340","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}
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