Possibilities of application of DIN EN 13036-4 Characteristics of road and airfield covering are considered. Test method. Part 4. Method of measurement of sliding resistance. Testing with a pendulum device to assess the coefficient of adhesion of road markings. This method is not applicable for diagnostics and more advanced scientific studies of rough and cohesive properties of road surfaces. The standard can be useful to control coupling properties of road markings, airfield pavements, examination of traffic accidents or for additional evaluate and evaluate the quality of road works, which, however, can be much better resolved based on domestic indicators standard deviation raznovysotnyh of Krasnoglinsky and raznolikosti geometry mikroheranhvatho road surface.
考虑了DIN EN 13036-4道路和机场覆盖的特性。测试方法。第4部分。滑动阻力的测量方法。用摆锤装置测试道路标志的附着力系数。这种方法不适用于路面粗糙性和粘性的诊断和更高级的科学研究。该标准可用于控制道路标线、机场路面的耦合特性、检查交通事故或对道路工程的质量进行额外的评价和评价，然而，基于国内指标标准偏差krasnogllinsky和raznolikosti几何mikroheranhvatho路面可以更好地解决这些问题。
{"title":"Determination of the coefficient of adhesion of the wheels of vehicles with road markings","authors":"M. Goncharova, B. Bondarev, T. Akchurin","doi":"10.15862/37sats319","DOIUrl":"https://doi.org/10.15862/37sats319","url":null,"abstract":"Possibilities of application of DIN EN 13036-4 Characteristics of road and airfield covering are considered. Test method. Part 4. Method of measurement of sliding resistance. Testing with a pendulum device to assess the coefficient of adhesion of road markings. This method is not applicable for diagnostics and more advanced scientific studies of rough and cohesive properties of road surfaces.\u0000\u0000The standard can be useful to control coupling properties of road markings, airfield pavements, examination of traffic accidents or for additional evaluate and evaluate the quality of road works, which, however, can be much better resolved based on domestic indicators standard deviation raznovysotnyh of Krasnoglinsky and raznolikosti geometry mikroheranhvatho road surface.","PeriodicalId":145434,"journal":{"name":"Russian journal of transport engineering","volume":"37 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115337599","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}
Today’s successful operation within the oil and gas industry is based on the triangle “Safety – Reliability – Profitability (Efficiency)”. It is of high importance to properly balance these different and sometimes opposite positions. The article describes the characteristics of the strength of the buried offshore pipeline. Pipe geometric imperfections as the cross section ovality, combined load effects as axial and bending loads superimposed to the external pressure, material properties as compressive yield strength in the circumferential direction and across the wall thickness etc., significantly interfere in the definition of the demanding, in such projects, minimum wall thickness requirements.
{"title":"Analysis of buried pipelines laid under the pipelines operation, is subjected to operational loads","authors":"Liudmila Muravieva, I. Ovchinnikov","doi":"10.15862/30sats319","DOIUrl":"https://doi.org/10.15862/30sats319","url":null,"abstract":"Today’s successful operation within the oil and gas industry is based on the triangle “Safety – Reliability – Profitability (Efficiency)”.\u0000\u0000It is of high importance to properly balance these different and sometimes opposite positions. The article describes the characteristics of the strength of the buried offshore pipeline. Pipe geometric imperfections as the cross section ovality, combined load effects as axial and bending loads superimposed to the external pressure, material properties as compressive yield strength in the circumferential direction and across the wall thickness etc., significantly interfere in the definition of the demanding, in such projects, minimum wall thickness requirements.","PeriodicalId":145434,"journal":{"name":"Russian journal of transport engineering","volume":"120 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123227839","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}
Earlier work on the study of frequency characteristics of thin-walled underground pipeline to obtain an equation for finding the natural frequencies of the straight sections of the pipeline, taking into account the parameter of the longitudinal force, the magnitude of internal pressure, coefficient of elastic resistance of the soil, the option of thin tubing and added mass of the soil. In this article, using the obtained equation, we study the influence of the length of the section of the pipeline laid in the soil with different physical-mechanical characteristics, and the effect of the parameter of the longitudinal compressive forces at the frequency of free oscillations of thin-walled straight pipeline under the action of various internal working pressure for pipes of different diameters with different wall thicknesses. On the basis of the design data defined in the derived formulae, is determined by the criterion of application of shell theory or the core theory for finding the natural frequencies of thin-walled underground pipelines of large diameter, depending on the length of the element. Simultaneously, the obtained expression allows to determine the critical force at which buckling occurs in the core of the theory («beam buckling»), as well as the formula to determine the critical force, from which buckling occurs by shell theory (flattening of the cross section). Based on these data, it is concluded that flattening the cross section of the pipeline will occur when the force is at times less than required for the formation of «arch release», and consequently to ensure the reliability of underground thin-walled large diameter pipeline should be the first thing to check for resistance on the shell theory.
{"title":"A study of the length parameter and the longitudinal compressive forces in the determination of frequencies of free vibrations of thin-walled underground pipelines of large diameter","authors":"A. Dmitriev, V. Sokolov, A. Bereznev","doi":"10.15862/40sats319","DOIUrl":"https://doi.org/10.15862/40sats319","url":null,"abstract":"Earlier work on the study of frequency characteristics of thin-walled underground pipeline to obtain an equation for finding the natural frequencies of the straight sections of the pipeline, taking into account the parameter of the longitudinal force, the magnitude of internal pressure, coefficient of elastic resistance of the soil, the option of thin tubing and added mass of the soil.\u0000\u0000In this article, using the obtained equation, we study the influence of the length of the section of the pipeline laid in the soil with different physical-mechanical characteristics, and the effect of the parameter of the longitudinal compressive forces at the frequency of free oscillations of thin-walled straight pipeline under the action of various internal working pressure for pipes of different diameters with different wall thicknesses.\u0000\u0000On the basis of the design data defined in the derived formulae, is determined by the criterion of application of shell theory or the core theory for finding the natural frequencies of thin-walled underground pipelines of large diameter, depending on the length of the element.\u0000\u0000Simultaneously, the obtained expression allows to determine the critical force at which buckling occurs in the core of the theory («beam buckling»), as well as the formula to determine the critical force, from which buckling occurs by shell theory (flattening of the cross section). Based on these data, it is concluded that flattening the cross section of the pipeline will occur when the force is at times less than required for the formation of «arch release», and consequently to ensure the reliability of underground thin-walled large diameter pipeline should be the first thing to check for resistance on the shell theory.","PeriodicalId":145434,"journal":{"name":"Russian journal of transport engineering","volume":"64 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116822503","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}
Currently, as the lighting characteristics of road markings used indicators of reflection and color. The indicator of light reflection when measured by a reflectometer is normalized as an absolute value, however, the perception of the driver and other road users (pedestrians, wheelchair users, cyclists) of road markings is carried out by means of vision relative to the surrounding background. Meanwhile, there is virtually no applicable regulatory document GOST 26824-86 Buildings and structures. Methods of measuring brightness, which establishes methods for measuring the brightness of working surfaces in buildings and structures, road surfaces of streets, roads and squares, facades of buildings and structures to determine its compliance with established standards. It is proposed to introduce into the regulatory framework for road markings indicators of brightness, contrast and sharpness.
{"title":"Providing lighting characteristics of lightness, brightness and sharpness of road markings","authors":"K. Pugin","doi":"10.15862/39sats319","DOIUrl":"https://doi.org/10.15862/39sats319","url":null,"abstract":"Currently, as the lighting characteristics of road markings used indicators of reflection and color. The indicator of light reflection when measured by a reflectometer is normalized as an absolute value, however, the perception of the driver and other road users (pedestrians, wheelchair users, cyclists) of road markings is carried out by means of vision relative to the surrounding background. Meanwhile, there is virtually no applicable regulatory document GOST 26824-86 Buildings and structures. Methods of measuring brightness, which establishes methods for measuring the brightness of working surfaces in buildings and structures, road surfaces of streets, roads and squares, facades of buildings and structures to determine its compliance with established standards. It is proposed to introduce into the regulatory framework for road markings indicators of brightness, contrast and sharpness.","PeriodicalId":145434,"journal":{"name":"Russian journal of transport engineering","volume":"128 16","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131775086","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 part of the author’s dissertation research. Multi-element metal structures are widely used in the construction of transport structures (metal spans, trusses of railway bridges, overpasses, etc.). During operation, such structures are subjected to the joint effect of loads, temperatures, and corrosive media. In accordance with this, the task of predicting the behavior of such structures seems to be relevant. It consists in the development of effective models oriented to the calculation of the bearing capacity of structural elements subjected to corrosive wear. The article discusses the most common corrosion damage to metal multi-element structures of transport facilities, the classification of corrosion processes according to the nature of the surface destruction, the main types of metal elements and bridge structures. The main parameters characterizing the corrosive wear of metal structures were determined. Ways to account for the effect of aggressive environment on metal structures, i.e. well-known mathematical models and work, in which attention is paid to the problem of corrosion, wear modeling. The process of identifying corrosion wear models (determining unknown model coefficients) is described. The system of equations for determining the coefficients of a mathematical model of corrosive wear is given. The values of the coefficients of the models used to predict the behavior of structures, with a different choice of an intermediate point are given. A statically indefinable flat five-element truss of arbitrary cross section, part of the rods of which works in tension and part in compression is considered. For this design solves the problem of assessing durability. To solve this problem, use the corrected Euler method. The obtained numerical values of the durability of trusses of five rods, depending on the lengths of the rods.
{"title":"Modeling of corrosion-mechanical behavior of multi-element metal structures of transport works in real-world conditions","authors":"V. Chernykh","doi":"10.15862/22sats319","DOIUrl":"https://doi.org/10.15862/22sats319","url":null,"abstract":"The article is part of the author’s dissertation research. Multi-element metal structures are widely used in the construction of transport structures (metal spans, trusses of railway bridges, overpasses, etc.). During operation, such structures are subjected to the joint effect of loads, temperatures, and corrosive media. In accordance with this, the task of predicting the behavior of such structures seems to be relevant. It consists in the development of effective models oriented to the calculation of the bearing capacity of structural elements subjected to corrosive wear.\u0000\u0000The article discusses the most common corrosion damage to metal multi-element structures of transport facilities, the classification of corrosion processes according to the nature of the surface destruction, the main types of metal elements and bridge structures. The main parameters characterizing the corrosive wear of metal structures were determined. Ways to account for the effect of aggressive environment on metal structures, i.e. well-known mathematical models and work, in which attention is paid to the problem of corrosion, wear modeling. The process of identifying corrosion wear models (determining unknown model coefficients) is described. The system of equations for determining the coefficients of a mathematical model of corrosive wear is given.\u0000\u0000The values of the coefficients of the models used to predict the behavior of structures, with a different choice of an intermediate point are given. A statically indefinable flat five-element truss of arbitrary cross section, part of the rods of which works in tension and part in compression is considered. For this design solves the problem of assessing durability. To solve this problem, use the corrected Euler method. The obtained numerical values of the durability of trusses of five rods, depending on the lengths of the rods.","PeriodicalId":145434,"journal":{"name":"Russian journal of transport engineering","volume":"64 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121152972","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 describes the construction of a unique bridge crossing in Dubna, Moscow Region. Design work started at the beginning of the 2000s. Several options were suggested, clients and design companies changed several times. In 2016, the construction of the bridge crossing over the Volga started. “Institute Giprostroymost” JSC was chosen as a general designer. A range of engineering surveying was carried out and work paper was worked out by the company. The location of the city on the banks of the Volga determined a sustained transport problem. The shortest crossing of the right and left banks was provided by Ivankovskaya hydropower plant. Actual traffic capacity of the crossing was not enough, and this led to regular traffic congestion. The nearest bridge was situated at the distance of 30 km, in the town of Kimry in the Tverskaya Region. The transport infrastructure situation hampered the development of the “Dubna” special economic zone of technology and innovation type which includes an innovation territorial cluster of nuclear-physical and nanotechnologies as well as the city of Dubna itself. Transport accessibility to the Federal Data Processing Centre of the Federal Tax Service of Russia was also limited. The bridge crossing has 4 lanes and consists of motor road approaches and a highway bridge. Shipping length of the bridge with approaches is 1939,93 m. Shipping length together with the length of the ramps is 2997,99 m. Total length of the bridge crossing accounts for 1 166,25 m. Central navigation span is 168,0 m. The construction of the bridge crossing was carried out within the minimum time limit. 24 months after the erection of the bridge started, in November 2018, the bridge was put into operation.
{"title":"Construction of a bridge crossing over the Volga in Dubna, Moscow Region","authors":"A. Kapikyan, Natalya Voytseshchuk","doi":"10.15862/21sats319","DOIUrl":"https://doi.org/10.15862/21sats319","url":null,"abstract":"The article describes the construction of a unique bridge crossing in Dubna, Moscow Region. Design work started at the beginning of the 2000s. Several options were suggested, clients and design companies changed several times. In 2016, the construction of the bridge crossing over the Volga started. “Institute Giprostroymost” JSC was chosen as a general designer. A range of engineering surveying was carried out and work paper was worked out by the company.\u0000\u0000The location of the city on the banks of the Volga determined a sustained transport problem. The shortest crossing of the right and left banks was provided by Ivankovskaya hydropower plant. Actual traffic capacity of the crossing was not enough, and this led to regular traffic congestion. The nearest bridge was situated at the distance of 30 km, in the town of Kimry in the Tverskaya Region. The transport infrastructure situation hampered the development of the “Dubna” special economic zone of technology and innovation type which includes an innovation territorial cluster of nuclear-physical and nanotechnologies as well as the city of Dubna itself. Transport accessibility to the Federal Data Processing Centre of the Federal Tax Service of Russia was also limited.\u0000\u0000The bridge crossing has 4 lanes and consists of motor road approaches and a highway bridge.\u0000\u0000Shipping length of the bridge with approaches is 1939,93 m.\u0000\u0000Shipping length together with the length of the ramps is 2997,99 m.\u0000\u0000Total length of the bridge crossing accounts for 1 166,25 m.\u0000\u0000Central navigation span is 168,0 m.\u0000\u0000The construction of the bridge crossing was carried out within the minimum time limit. 24 months after the erection of the bridge started, in November 2018, the bridge was put into operation.","PeriodicalId":145434,"journal":{"name":"Russian journal of transport engineering","volume":"39 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122012575","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 paper is devoted to polymer composite beams dynamic behavior simulation. The nonlocal damping model is used as a model of the internal friction. The vibration process is considered in this paper using the beam with fixed ends as an example. Equation of beam motion considering nonlocal damping is solved by Galerkin method to develop the model. The required number of eigenmodes is obtained for the beam under an instantly applied distributed load. The influence of nonlocal damping model parameters variation on the beam vibration process simulation results is considered under a periodic deterministic distributed load. The calibration of nonlocal damping model consists of defining its parameter known as influence distance which characterize the level of the nonlocal properties in material. Calibration is carried out with the least squares method using the numerical simulation data. For this purpose the results of 3D finite element modeling of thermoset vinyl ester fiber reinforced plastic beam vibrations under the instantly applied load were used. The 3D finite element model of the beam was created in SIMULIA Abaqus taking into account the orthotropic properties of the material. The calibrated model was justified for the beams with changed geometry. The results presented in this paper were obtained during the research for the PhD thesis.
{"title":"Calibration of nonlocal damping model based on numerical simulation results","authors":"","doi":"10.15862/16sats319","DOIUrl":"https://doi.org/10.15862/16sats319","url":null,"abstract":"The paper is devoted to polymer composite beams dynamic behavior simulation. The nonlocal damping model is used as a model of the internal friction. The vibration process is considered in this paper using the beam with fixed ends as an example. Equation of beam motion considering nonlocal damping is solved by Galerkin method to develop the model. The required number of eigenmodes is obtained for the beam under an instantly applied distributed load. The influence of nonlocal damping model parameters variation on the beam vibration process simulation results is considered under a periodic deterministic distributed load. The calibration of nonlocal damping model consists of defining its parameter known as influence distance which characterize the level of the nonlocal properties in material. Calibration is carried out with the least squares method using the numerical simulation data. For this purpose the results of 3D finite element modeling of thermoset vinyl ester fiber reinforced plastic beam vibrations under the instantly applied load were used. The 3D finite element model of the beam was created in SIMULIA Abaqus taking into account the orthotropic properties of the material. The calibrated model was justified for the beams with changed geometry. The results presented in this paper were obtained during the research for the PhD thesis.","PeriodicalId":145434,"journal":{"name":"Russian journal of transport engineering","volume":"155 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116582386","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}
Kabanov Aleksandr, I. Kolos, V. Chernyaeva, A. Ilin, O. Medvedeva, I. Semenov
This article discusses the problems that arise in the operation of road structures. One of the most important is rutting. Indicators of resistance to rutting depend on the method of design of non-rigid pavement and operational parameters, which allows to obtain the applied method of volumetric design of asphalt mix «Superpave» (SP-19), which in our country was called «SPAS». The authors, together with the staff of the laboratory of asphalt Concrete plant – 1, monitored asphalt concrete mixtures designed according to the «Superpave» system on the asphalt mixing plant. Then tests were carried out according to the method of PNST 181-2016 on the susceptibility of asphalt concrete materials to shear deformations arising under the action of repeated passes of the loaded wheel at ambient temperature. The result of the study of rutting showed that the mixture SP-19 have predominantly traditional. More detailed research results are presented in this article. Based on the data obtained from the results, conclusions were formulated: the Studies show that the method of «Superpeyv» is updated to the requirements of technical supervision at the objects of the road complex of the Russian Federation. In conclusion, the authors have formulated conclusions on the research: a comparison of physical and mechanical performance of asphalt concrete mix SP-19 on PNST 114 and fine-grained asphalt concrete mix type A brand I shows that the shear stability in terms of the average depth of the track is higher for the brand SP-19 by 38 %; set the required mixing temperature and compaction of asphalt concrete mixture on the system «Superpeyv»; the release of a pilot batch of asphalt concrete mix of SP-19 brand at the production site of JSC «ABZ-1» showed that the recipe selected in the laboratory is reproduced in the ABZ; cores selected within the framework of technical supervision from the experimental coating and tested in the laboratory showed corresponding to the requirements of ODM 218.4.038-2017; assessment of economic efficiency at the cost of asphalt concrete mix of SP-19 brand showed a decrease of 2.2 % relative to the cost of fine-grained asphalt concrete mix; the increase in the service life of the road surface h 30–50 % by reducing rutting increases its turnaround time. At the same time, economic efficiency can reach 50 % per m2.
{"title":"Actualization of innovative technologies in road construction","authors":"Kabanov Aleksandr, I. Kolos, V. Chernyaeva, A. Ilin, O. Medvedeva, I. Semenov","doi":"10.15862/11sats319","DOIUrl":"https://doi.org/10.15862/11sats319","url":null,"abstract":"This article discusses the problems that arise in the operation of road structures. One of the most important is rutting. Indicators of resistance to rutting depend on the method of design of non-rigid pavement and operational parameters, which allows to obtain the applied method of volumetric design of asphalt mix «Superpave» (SP-19), which in our country was called «SPAS». The authors, together with the staff of the laboratory of asphalt Concrete plant – 1, monitored asphalt concrete mixtures designed according to the «Superpave» system on the asphalt mixing plant. Then tests were carried out according to the method of PNST 181-2016 on the susceptibility of asphalt concrete materials to shear deformations arising under the action of repeated passes of the loaded wheel at ambient temperature. The result of the study of rutting showed that the mixture SP-19 have predominantly traditional. More detailed research results are presented in this article. Based on the data obtained from the results, conclusions were formulated: the Studies show that the method of «Superpeyv» is updated to the requirements of technical supervision at the objects of the road complex of the Russian Federation. In conclusion, the authors have formulated conclusions on the research: a comparison of physical and mechanical performance of asphalt concrete mix SP-19 on PNST 114 and fine-grained asphalt concrete mix type A brand I shows that the shear stability in terms of the average depth of the track is higher for the brand SP-19 by 38 %; set the required mixing temperature and compaction of asphalt concrete mixture on the system «Superpeyv»; the release of a pilot batch of asphalt concrete mix of SP-19 brand at the production site of JSC «ABZ-1» showed that the recipe selected in the laboratory is reproduced in the ABZ; cores selected within the framework of technical supervision from the experimental coating and tested in the laboratory showed corresponding to the requirements of ODM 218.4.038-2017; assessment of economic efficiency at the cost of asphalt concrete mix of SP-19 brand showed a decrease of 2.2 % relative to the cost of fine-grained asphalt concrete mix; the increase in the service life of the road surface h 30–50 % by reducing rutting increases its turnaround time. At the same time, economic efficiency can reach 50 % per m2.","PeriodicalId":145434,"journal":{"name":"Russian journal of transport engineering","volume":"20 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128383111","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}
S. Koval, E. Pestryakova, A. Piskunov, F. Kiselev, M. Erofeev, A. Sonin, A. Beterbiev
For performance of works on the device of tunnel constructions in the conditions of the water-saturated unstable soils having character floating, their stabilization and strengthening is provided. During the construction of combined ventilation and technological failure of the existing subway, planned for the production of construction and installation works by mining in water-saturated fine Sands, provides for the implementation of measures to freeze the soil mass. For the safe construction of the workings of the decision on the implementation of the calculations and mathematical modeling of the impact on the lining and tongue and groove fencing in the production of works for freezing, opening the lining and thawing of the soil array. The article presents the results of analytical studies of the state of the rock sand massif in freezing conditions. The algorithm of numerical realization of the spatial inelastic problem using the method of finite differences and finite elements of MacCormack of the second order for dynamic problems is used and implemented to calculate the structure on mechanical effects. The finite element method is used in the Lagrange formulation of dynamic and static problems. The model of concrete and soil, described by the theory of plastic flow for shear, taking into account the rate of loading under volumetric deformation, is applied. To solve static (quasi-static problems), the method of establishing an explicit implementation or a quasi-static method in the absence of inertial terms is used. The layered two-phase medium, each layer of which is homogeneous and isotropic, is considered. This medium simulates the behavior of water-saturated soil, one phase of which is in the melt, and the other in the frozen state.
{"title":"Estimated justification of the bearing capacity of the lining when opening auxiliary workings in conditions of local freezing of the rock mass","authors":"S. Koval, E. Pestryakova, A. Piskunov, F. Kiselev, M. Erofeev, A. Sonin, A. Beterbiev","doi":"10.15862/33sats319","DOIUrl":"https://doi.org/10.15862/33sats319","url":null,"abstract":"For performance of works on the device of tunnel constructions in the conditions of the water-saturated unstable soils having character floating, their stabilization and strengthening is provided.\u0000\u0000During the construction of combined ventilation and technological failure of the existing subway, planned for the production of construction and installation works by mining in water-saturated fine Sands, provides for the implementation of measures to freeze the soil mass.\u0000\u0000For the safe construction of the workings of the decision on the implementation of the calculations and mathematical modeling of the impact on the lining and tongue and groove fencing in the production of works for freezing, opening the lining and thawing of the soil array.\u0000\u0000The article presents the results of analytical studies of the state of the rock sand massif in freezing conditions.\u0000\u0000The algorithm of numerical realization of the spatial inelastic problem using the method of finite differences and finite elements of MacCormack of the second order for dynamic problems is used and implemented to calculate the structure on mechanical effects. The finite element method is used in the Lagrange formulation of dynamic and static problems.\u0000\u0000The model of concrete and soil, described by the theory of plastic flow for shear, taking into account the rate of loading under volumetric deformation, is applied. To solve static (quasi-static problems), the method of establishing an explicit implementation or a quasi-static method in the absence of inertial terms is used.\u0000\u0000The layered two-phase medium, each layer of which is homogeneous and isotropic, is considered. This medium simulates the behavior of water-saturated soil, one phase of which is in the melt, and the other in the frozen state.","PeriodicalId":145434,"journal":{"name":"Russian journal of transport engineering","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121599878","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 work the problem of use of Heavy Lifting technology («Rise of heavy constructions») for dismantling of the flying structure of the bridge at its reconstruction is considered. The questions of development and application vertically of drawbridges are raised. Contribution of foreign designers to development of adjustable flights. Experience of modern construction of bridges, using a method, for mounting of metal constructions of bridges is considered. The importance of short-term repair and reconstruction of bridge constructions as most important components of a transport network of the country is noted. Reconstruction of the bridge through the Tobol River on federal highway R-404 in the Tyumen region is briefly considered. Works of authors, about technology of safe use of lifting frames for rise and lowering of segments of steel concrete bridges and beams for a sliding of flying buildings from previously strained concrete. Foreign and domestic experience of use of Heavy Lifting technology for mounting and dismantling of bridge constructions is considered. On the example of works on dismantling of the flying building at reconstruction of the bridge through the Yuganskaya River of a channel on km 740,863 highways R-404 Tyumen-Tobolsk-Khanty-Mansiysk are shown to feature of works on this technology, the arising problems and ways of their solution. It is noted that use of Heavy Lifting technology allows carrying out reconstruction to the shortest possible time, having saved considerable resources.
{"title":"Reconstruction of the bridge using heavy lifting technique","authors":"I. Peshkov, I. Ovchinnikov","doi":"10.15862/38sats319","DOIUrl":"https://doi.org/10.15862/38sats319","url":null,"abstract":"In work the problem of use of Heavy Lifting technology («Rise of heavy constructions») for dismantling of the flying structure of the bridge at its reconstruction is considered.\u0000\u0000The questions of development and application vertically of drawbridges are raised. Contribution of foreign designers to development of adjustable flights. Experience of modern construction of bridges, using a method, for mounting of metal constructions of bridges is considered. The importance of short-term repair and reconstruction of bridge constructions as most important components of a transport network of the country is noted. Reconstruction of the bridge through the Tobol River on federal highway R-404 in the Tyumen region is briefly considered.\u0000\u0000Works of authors, about technology of safe use of lifting frames for rise and lowering of segments of steel concrete bridges and beams for a sliding of flying buildings from previously strained concrete. Foreign and domestic experience of use of Heavy Lifting technology for mounting and dismantling of bridge constructions is considered.\u0000\u0000On the example of works on dismantling of the flying building at reconstruction of the bridge through the Yuganskaya River of a channel on km 740,863 highways R-404 Tyumen-Tobolsk-Khanty-Mansiysk are shown to feature of works on this technology, the arising problems and ways of their solution. It is noted that use of Heavy Lifting technology allows carrying out reconstruction to the shortest possible time, having saved considerable resources.","PeriodicalId":145434,"journal":{"name":"Russian journal of transport engineering","volume":"13 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127573065","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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