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Articles 61 - 90 of 168
Full-Text Articles in Transportation Engineering
About The Influence Of Some Recipe-Technological Factors On The Properties Of Non-Autoclave Gas Concrete, Anvar Ishanovich Adilkhodjayev, S.S. Shaumarov
About The Influence Of Some Recipe-Technological Factors On The Properties Of Non-Autoclave Gas Concrete, Anvar Ishanovich Adilkhodjayev, S.S. Shaumarov
Journal of Tashkent Institute of Railway Engineers
This article presents the results of experimental studies on the production of cellular concrete with increased strength properties and improved indicators of the coefficient of structural quality. The use of the proposed composition will allow you to dispose of waste concrete and reduce production costs.
Research Of The Possibility Of Using Waste Of Paint And Varnish Materials For Anti-Corrosion Protection Of Metal Parts Of Transport Equipment, Aida Barxanadjyan, Ravshan Hakimov, Botir Ibragimov
Research Of The Possibility Of Using Waste Of Paint And Varnish Materials For Anti-Corrosion Protection Of Metal Parts Of Transport Equipment, Aida Barxanadjyan, Ravshan Hakimov, Botir Ibragimov
Journal of Tashkent Institute of Railway Engineers
This work is devoted to the corrosion protection of metal parts of transport equipment. The purpose of this study is the use of waste paint and varnish materials (PVM) to obtain anti-corrosion coatings of metal parts. PVMwaste is the loss of paints obtained when painting automobiles. The epoxy polyurethane oligomer synthesized by us was used as a binder resin. During the research, the physicochemical properties of the waste were studied the components were selected to obtain anticorrosive mastic. The resulting mastic was tested in laboratory conditions in accordance with the standards for adhesion, chemical resistance, film strength in bending and …
Production Of Building Materials Based On Waste Industry, Uchqun Abdullayevich Gaziyev
Production Of Building Materials Based On Waste Industry, Uchqun Abdullayevich Gaziyev
Journal of Tashkent Institute of Railway Engineers
The article describes the production technology of building materials based on industrial waste. Innovative technologies in the production of building materials, using industrial waste, are fully consistent with the research carried out at the Department of Technology of Building Materials, Products and Structures of the Tashkent Architectural and Construction Institute under the scientific supervision of the author of this article. Scientific developments in innovative technologies were carried out in several areas in the field of building materials and products. Based on the waste from the Angren coal deposit and local rocks, quartzite and dacitic porphyry, a gravel-like porous aggregate has …
Technology Of Application Of Mechanical Joints Of Reinforcement In The Construction Of Towers Made Of Monolithic Reinforced Concrete, Kadir Karimovich Akhmedov
Technology Of Application Of Mechanical Joints Of Reinforcement In The Construction Of Towers Made Of Monolithic Reinforced Concrete, Kadir Karimovich Akhmedov
Journal of Tashkent Institute of Railway Engineers
Today, more than 3,000 skyscrapers have been built in the world, a third of which were built in China (including Hong Kong and Macao). The rest are located in the United States, Japan, the UAE and other countries, and every year more and more countries join the “sky club”. Uzbekistan also seeks to join this club and construction of the first NEST ONE skyscraper in Tashkent has begun. High-grade steel, concrete and a safe elevator are the true creators of the high-rise boom. In particular, reinforced concrete and the development of technologies for working with it contributed to the increase …
Metal Wooden Spatial Rod Construction From Composition Wooden Elements, Narimonjon Sultanbaevich Tursunov, Sobirjon Juraevich Razzakov
Metal Wooden Spatial Rod Construction From Composition Wooden Elements, Narimonjon Sultanbaevich Tursunov, Sobirjon Juraevich Razzakov
Journal of Tashkent Institute of Railway Engineers
Metal wooden spatial core structure, including upper and lower grids, braces, combining the nodes of the upper and lower grids, and vertical strands, characterized in that, in order to ensure redistribution of forces and uniform load of structural elements and giving additional stiffness compressive composite small-sized boards of the upper belt and the lower metal belt with a special tensile nut to give the building a structural lift, are displaced in plan relative to each other by 45 °, while the braces in the nodes of the grids are located mutually perpendicular and in one direction they are made descending, …
Structure Formation Of A Cement Stone With A Zeolite Containing Filler (Natrolite) And A Superplastificator, Anvar Ishanovich Adilkhodjayev, Ilkhom Abdullaevich Kadyrov, Kadyr Saparbaevich Umarov
Structure Formation Of A Cement Stone With A Zeolite Containing Filler (Natrolite) And A Superplastificator, Anvar Ishanovich Adilkhodjayev, Ilkhom Abdullaevich Kadyrov, Kadyr Saparbaevich Umarov
Journal of Tashkent Institute of Railway Engineers
The article presents the results of studies of the hydration process of the compositions "cement + zeolite-containing rock + superplasticizer" using the methods of IR spectrometry, differential thermal analysis. The scientific and practical significance of the work results for building materials science and the construction industry is to establish the effectiveness of the use of complex additives in the preparation of cement concrete.
State And Prospects Of Production And Operation Of Synthetic Woven Belts (Table) For Load-Handling Devices (Hd) In The Republic Of Uzbekistan, Ibrohim Numanovich Abdullaev, Zhamoldin Dzhalalovich Akhmedov, Bakhodir Kushakovich Rakhmanov, Ruzikhon Toyirzhanovna Zhurabaeva
State And Prospects Of Production And Operation Of Synthetic Woven Belts (Table) For Load-Handling Devices (Hd) In The Republic Of Uzbekistan, Ibrohim Numanovich Abdullaev, Zhamoldin Dzhalalovich Akhmedov, Bakhodir Kushakovich Rakhmanov, Ruzikhon Toyirzhanovna Zhurabaeva
Journal of Tashkent Institute of Railway Engineers
In the world, the use of synthetic woven tapes (SWT) is increasing in various areas of life, including in construction. In particular, thanks to the development of production of high-strength synthetic fibers in such developed countries as Russia, USA, Germany, progress has been made in the creation and manufacture of heavy-duty lifting slings from STL, and on this basis to improve ergonomics and safety of installers, the safety of transported goods, the reduction of labor input and material on the load capacity.
Investigation Of The Longitudinal Hijacking Force From Friction Braking, Makhamadjan Mirakhmedovich Mirakhmedov, Gali-Askar Rustamovich Khalfin
Investigation Of The Longitudinal Hijacking Force From Friction Braking, Makhamadjan Mirakhmedovich Mirakhmedov, Gali-Askar Rustamovich Khalfin
Journal of Tashkent Institute of Railway Engineers
On the elements of the longitudinal profile, when the train is decelerated from friction, an additional force of theft occurs. By modeling the braking process, the dependence of the driving forces on the braking friction is close to linear. The result of theft also depends on the power of the anti-theft system, namely, the force of pressing the fastening terminal to the rail, the weakness of which can subsequently affect the safety of trains and cause the track to be thrown out.
Method For Evaluating The Residual Resource Of Long Designs, Sergey Vladimirovich Chizhov, Ulugbek Zabixullayevich Shermuxamedov, Sharofat Shavkatovna Kadirova
Method For Evaluating The Residual Resource Of Long Designs, Sergey Vladimirovich Chizhov, Ulugbek Zabixullayevich Shermuxamedov, Sharofat Shavkatovna Kadirova
Journal of Tashkent Institute of Railway Engineers
The article describes a method for calculating the safety of extended structures, in particular tunnels. The probabilistic approach to solving the problem is analyzed using the reliability of the structure with the probability of failure-free operation and assessment of the residual life of the structure. These characteristics make it possible to predict the residual life of the structure within a time value until the design has exhausted its ultimate state. An assessment of the operational reliability of the structure is carried out by measuring and establishing existing structural defects. Based on the data obtained, an analysis was carried out and …
About The Technology Of Making Reinforced Concrete Sleep By Heating Concrete At Low Temperature, Turgunbaev Urinbek Jamolovich, Movluda Umirova
About The Technology Of Making Reinforced Concrete Sleep By Heating Concrete At Low Temperature, Turgunbaev Urinbek Jamolovich, Movluda Umirova
Journal of Tashkent Institute of Railway Engineers
The article discusses the properties of cement stone with the use of complex chemical additives to improve the technology for the production of sleepers from prestressed concrete. With the use of superplasticizer, the volume of intergranular space and, consequently, capillary porosity, which is a determining factor for both strength and frost resistance and corrosion resistance of concrete, are significantly reduced. Also, during thermo-wet processing, at a temperature of 40 ° C, there was no decrease in the strength of cement stone and sufficient strength at the initial stage of the curing period, 36 MPa with the addition of Glenium 27 …
About Properties Of Modified Gypsum Compositions With Slag Filler And Chemical Additive, Jumagul Raximberdievna Turgunbaeva
About Properties Of Modified Gypsum Compositions With Slag Filler And Chemical Additive, Jumagul Raximberdievna Turgunbaeva
Journal of Tashkent Institute of Railway Engineers
The article presents the results of experiments to assess the effect of slag filler and chemical additives on the physical properties of the modified gypsum composition. In particular, it was shown that the water demand of building gypsum increases with an increase in the content of metallurgical slag in the composition. With its constant amount, an increase in the proportion of GLENIUM 27S superplasticizer additive does not affect the normal density value of the gypsum dough. This suggests that the presence of a plasticizing effect from the introduction of superplasticizer GLENIUM 27S. In addition, filling gypsum with metallurgical slag with …
Experimental Research Methodology For The Crack Resistance Of Large-Panel Buildings In Seismic Areas, Nigmat Baxramovich Shaumarov, Ulugbek Xakimovich Abdullayev
Experimental Research Methodology For The Crack Resistance Of Large-Panel Buildings In Seismic Areas, Nigmat Baxramovich Shaumarov, Ulugbek Xakimovich Abdullayev
Journal of Tashkent Institute of Railway Engineers
The experience of the Tashkent, Spitak, Kyrgyz and Kamchatka earthquakes of recent years has led to the conclusion that there is a sufficient good seismic resistance of large-panel buildings with a narrow step of transverse load-bearing walls. One of the distinguishing structural features of buildings is considered to be the overlapping of individual multi-hollow panels with their support on special cantilevered outlets along the lateral surfaces of the transverse walls. Elements of the outer walls were made of expanded clay concrete with a compressive strength of about 200 kg / cm2. All structures were reinforced with flat welded frames made …
Investigation Of Way Embankment Stability On Movement Of High Speed Trains, Mirzakhid Khamitovich Miralimov, Shakhboz Ulugbekovich Normurodov
Investigation Of Way Embankment Stability On Movement Of High Speed Trains, Mirzakhid Khamitovich Miralimov, Shakhboz Ulugbekovich Normurodov
Journal of Tashkent Institute of Railway Engineers
In this paper is considered the problem related with a stressed state of railway embankments taking into account of dynamic loadings from high-speed trains. In the offered technical method is giving wave nature transmissions of dynamic loading from the passenger trains and their interaction of soil layers with various parameters. The design procedure gives a clear physical and mathematical pattern, where all formulas are in detail shown and simple for understanding. Calculation is conducted numerically in two stages. Considering from classical principles of structural mechanics, the first calculation stage of the railway structures includes deformation of the railway sleepers taking …
Research Of Properties Of Composite Elastomeric Material Filled With Montmorillonite Of Karakalpakstan With Nanoparticles, Bakhadir Bakhramovich Kakharov, Akhmadjan Ibadullaev, Elmira Ubaydullayevna Teshabaeva, Marziya Begdullayevna Muftullayeva
Research Of Properties Of Composite Elastomeric Material Filled With Montmorillonite Of Karakalpakstan With Nanoparticles, Bakhadir Bakhramovich Kakharov, Akhmadjan Ibadullaev, Elmira Ubaydullayevna Teshabaeva, Marziya Begdullayevna Muftullayeva
Journal of Tashkent Institute of Railway Engineers
The paper presents the results of studies on the effect of montmorillonite of Karakalpakstan with nanoparticles on the specific properties of composite elastomeric materials based on a mixture of rubbers SKMS-30 ARKM-15 (70%) and SKN-26 (30%). It was found that with an increase in the filler content in rubber, the recoverability of the rubber compound after deformation is significantly reduced. Moreover, the ability of the system to accumulate the energy of elastic deformation, i.e. the swelling of the extrudate (Re), largely depends on the specific geometric surface (Ssp) of montmorillonite of Karakalpakstan. Studies of the properties of rubbers showed that …
Innovative Technologies For Formless Forming Of Multi-Hollow Floor Slabs, Anvar Ishanovich Adilkhodjayev, V.M. Tsoy, K Umarov
Innovative Technologies For Formless Forming Of Multi-Hollow Floor Slabs, Anvar Ishanovich Adilkhodjayev, V.M. Tsoy, K Umarov
Journal of Tashkent Institute of Railway Engineers
the article discusses the technology of non-formwork molding and reinforcement of hollow-core floor slabs. Optimal methods of concrete mixture compaction and reduction of cement consumption without loss of the required concrete strength are analyzed. The use of floor slabs developed using no-form molding technology in conditions of increased seismic activity.
About The Influence Of The Organosilicon Hydrophobizer "Gidrofob" On The Properties Of Non-Autoclave Gas Concrete, V.M. Tsoy, S. Hodjayev
About The Influence Of The Organosilicon Hydrophobizer "Gidrofob" On The Properties Of Non-Autoclave Gas Concrete, V.M. Tsoy, S. Hodjayev
Journal of Tashkent Institute of Railway Engineers
The article examines the effect of hydrophobizing additives on the normal density and setting time of the cement paste and the strength of the cement stone. We used an organosilicon additive - "Hydrophobe" as a water-repellent additive. As a result of research, it was found that the introduction of a water repellent agent, depending on its dosage, leads to a significant increase in the setting time and insignificantly affects the strength
Obtaining A Highly Effictive Antikorrosion And Depressant Additives Based On Local Raw Materiales, Abdumalik Nabievich Rizaev, Maksimovich Khakimov Abror, Shavkat Nabievich Rizaev
Obtaining A Highly Effictive Antikorrosion And Depressant Additives Based On Local Raw Materiales, Abdumalik Nabievich Rizaev, Maksimovich Khakimov Abror, Shavkat Nabievich Rizaev
Journal of Tashkent Institute of Railway Engineers
Possibility of the syntheses new lubricant materials are shown in work to lubricant on base local swam to resources. Possibility of the practical application polymeric additive are shown
The Engineering Decisions For Mitigation Of Damages In Landslide Hazardous Regions Of Uzbekistan, M.Х. Miralimov, Sh.U. Normurodov
The Engineering Decisions For Mitigation Of Damages In Landslide Hazardous Regions Of Uzbekistan, M.Х. Miralimov, Sh.U. Normurodov
Journal of Tashkent Institute of Railway Engineers
The article provides information on ongoing measures to protect the population, territory and infrastructure from the hazards associated with landslides and the elimination of their consequences. The whole complex of measures aimed to the decision the engineering tasks of anti-landslide protection are turned into the recognition and assessment of threats, stabilization and retention of the landslide massif.
New Sorbents For Adsorption Cleaning Phenol-Containing Waste Water Refinery, Bahodir Bahramovich Kakharov, Uchqun Vafokulovich Umarov
New Sorbents For Adsorption Cleaning Phenol-Containing Waste Water Refinery, Bahodir Bahramovich Kakharov, Uchqun Vafokulovich Umarov
Journal of Tashkent Institute of Railway Engineers
The article discusses some issues of creating new adsorbents based on local raw materials and waste for the purification of phenol-containing wastewater from refineries. Studied some sorption properties of new sorbents
Production Of Fire-Resistant Concrete Based On Technogenic Waste, Uzmonjon Turgunaliyevich Yusupov
Production Of Fire-Resistant Concrete Based On Technogenic Waste, Uzmonjon Turgunaliyevich Yusupov
Journal of Tashkent Institute of Railway Engineers
The article notes that at present, with the development of the construction industry, the need for fire-resistant concrete is also increasing. In increasing the volume of construction, concrete and other components are some of the resources available at the price of finished objects achieved through cost reduction. It is determined that the developed fire- and heat-resistant concrete, prepared according to the technological requirements developed by us and the established standards, will provide the facility with reliable fire safety and longevity
Development Of A Mathematical Model For Calculating The Strength Of The Main Frame Of The Vl80s Electric Truck Body For Railway Engineering, Galina Khromova, Sergey Khromov, Davran Radjibaev
Development Of A Mathematical Model For Calculating The Strength Of The Main Frame Of The Vl80s Electric Truck Body For Railway Engineering, Galina Khromova, Sergey Khromov, Davran Radjibaev
Journal of Tashkent Institute of Railway Engineers
A mathematical model was developed for the main body frame of the VL80s locomotive for railway engineering, including the justification of the design modes available in operation, the calculation of quasistatic characteristics for static loading modes, for single-thrust and double-thrust modes, for compression and tension modes. A calculation is also made on the effect of distributed inertial loads, then the power factors and stresses in the calculated sections of the main body frame of the VL80s electric locomotive are calculated. Summarizing conclusions are given on the maximum voltages in the design modes of the main frame of the VL80s electric …
Features Of Power Converters For Operation Of Electric Locomotives, Malika Nabievna Tuychieva
Features Of Power Converters For Operation Of Electric Locomotives, Malika Nabievna Tuychieva
Journal of Tashkent Institute of Railway Engineers
The work analyzed features of technical characteristics of AC electric locomotives from other electric locomotives used in Uzbekistan. Converters are installed in the power circuit, with GTO (lockable thyristor) for electric locomotives "Uzbekistan," and for electric locomotives "Uzbekistan - yulovci" with IGBT (bipolar transistor with isolated gate). In general, two main current converters are installed on the locomotive. Each of them consists of four-quadrant pulse rectifier with three coordinates, intermediate DC link and 2 types of voltage inverters. One inverter serves for two frame-controlled bogie motors, the other for one axial-controlled bogie motor. In case of damage to any traction …
To The Conclusion Of The Variational Equation Of Motion Of Shell Structures Supported By Frames And Stringers, Farkhod Erkinovich Abdukadirov
To The Conclusion Of The Variational Equation Of Motion Of Shell Structures Supported By Frames And Stringers, Farkhod Erkinovich Abdukadirov
Journal of Tashkent Institute of Railway Engineers
In this article is given the construction of the variational equation of motion of the shell structure supported by frames and stringers. Using the Hamilton - Ostrogradsky variational principle, systems of differential equations of motion of shell elements are obtained.
Damping Cell From Gallium Arsenide With Plasma Contacts In An Extreme Gas Discharge Cell, Khurshidjon Tolibovich Yuldashev, Sherzod Sodikjonovich Akhmedov, Jasurbek Mahammadovich Ibrohimov
Damping Cell From Gallium Arsenide With Plasma Contacts In An Extreme Gas Discharge Cell, Khurshidjon Tolibovich Yuldashev, Sherzod Sodikjonovich Akhmedov, Jasurbek Mahammadovich Ibrohimov
Journal of Tashkent Institute of Railway Engineers
The results of an experimental study of the photocurrent in a semi-insulating gallium arsenide with plasma contacts are presented in order to identify the conditions under which the generation interaction of a plasma by a semiconductor becomes significant. The experimental data are compared with the results predicted by the simplified theory.
Resource-Saving Maintenance And Repair Of The Traction Transformer Based On Its Diagnostics, Mirzhalil Sagatovich Yakubov, Kamolbek Hamidovich Turdibekov, Absaid Khurramovich Sulliev
Resource-Saving Maintenance And Repair Of The Traction Transformer Based On Its Diagnostics, Mirzhalil Sagatovich Yakubov, Kamolbek Hamidovich Turdibekov, Absaid Khurramovich Sulliev
Journal of Tashkent Institute of Railway Engineers
Based on a generalized analysis of the compiled mathematical model of the maintenance and repair system of a traction transformer of an electrified railway, a resource-saving strategy is made based on the use of the results of technical diagnostics and providing the calculation of the optimal periodicity of the overhaul periods according to the values of the practical probability of failures, the number of factors wagging on Actual residual life and exploited in various operating conditions oviyah his work.
Choosing The Optimal Scheme Of Placement Of Thermal Trains On The Chart Of The Movement Of Trains, Muslimа Djalalovna Akhmedova, Dilmurod Baхodirovich Butunov, Sardor Askarovich Abdukodirov
Choosing The Optimal Scheme Of Placement Of Thermal Trains On The Chart Of The Movement Of Trains, Muslimа Djalalovna Akhmedova, Dilmurod Baхodirovich Butunov, Sardor Askarovich Abdukodirov
Journal of Tashkent Institute of Railway Engineers
To analyze the methods of selecting the optimal scheme of layout of thermal trains at railway stations. Graphic and mathematical modeling methods are used. The factors influencing the selection of the optimal train schedule have been identified.Existing trains of thermal trains have been analyzed the schemes and mathematical formulas have been developed. Frequently used mathematical formulas at the railway stations, thermal trains create smooth and efficient traffic, and the train traffic destroys the possibility of direct adjustment.
To The Question Of Dispatching Regulation Of Overtaking Freight Trains, Samandar Bahtiyorovich Sattorov, Ruslanovna Ibragimova Gulshan, Daurenbek Ihtiyarovich Ilesaliev
To The Question Of Dispatching Regulation Of Overtaking Freight Trains, Samandar Bahtiyorovich Sattorov, Ruslanovna Ibragimova Gulshan, Daurenbek Ihtiyarovich Ilesaliev
Journal of Tashkent Institute of Railway Engineers
This article discusses the problems of the influence of accelerated freight trains on station and distillation intervals, as well as on a simple freight train under overtaking. The relevance of this article is due to the fact that irrational dispatch regulation of overtaking of freight trains with accelerated trains negatively affects the throughput of the railway line.
Linking Train Schedule Assignments To A Solid Schedule, Alexander Aleksanlrovich Svetashev, Nodir Qodirovich Aripov, Nargiza Faritovna Svetasheva
Linking Train Schedule Assignments To A Solid Schedule, Alexander Aleksanlrovich Svetashev, Nodir Qodirovich Aripov, Nargiza Faritovna Svetasheva
Journal of Tashkent Institute of Railway Engineers
The article provides an analysis of the composition of the sorting station during the accumulation of trains and the formation of trains with their departure on a solid schedule in order to establish dependencies that allow you to determine the cost of wagon-hours for the accumulation of cars and the rationale for the use of a solid schedule. The paper highlights the features of the process of accumulation of cars with a solid schedule as opposed to accumulation with a flexible schedule. As a result of modeling the composition of the solid schedule, the necessary parameters were calculated, which were …
Results Of Application Of The Methods “Conditional Group Sorting” And “Combinatorial Sorting” Duringthe Multi-Group Trains Formation, Sakijan Kabildjanovich Khudayberganov, Shinpolat Mansuraliyevich Suyunbayev, Alfiya Mirkhatimovna Bashirova, Sherzod Bakhromugli Jumayev
Results Of Application Of The Methods “Conditional Group Sorting” And “Combinatorial Sorting” Duringthe Multi-Group Trains Formation, Sakijan Kabildjanovich Khudayberganov, Shinpolat Mansuraliyevich Suyunbayev, Alfiya Mirkhatimovna Bashirova, Sherzod Bakhromugli Jumayev
Journal of Tashkent Institute of Railway Engineers
At present, the formation of multi-group freight trains on the sorting stations is the actual issue. The main raisons are: there is no exact (developed) technology, in order to form multi-group trains on the sort stations and also, formation of such type of trains according to the established procedure based on many years of experience of the relevant personnel. In this article, the results of the applied methods are presented “Conditional group sorting” and “Combinatorial sorting” during the multi-group trains formation on the sorting station JSC Uzbek Railways. The efficiency of the method “Conditional group sorting” has been revealed regarding …
Three-Way Thermal Model Of Asynchronous Traction Engines For Diagnostics Of Their Technical Condition, Zhavkharbek Sulton Ugli Fayzullaev
Three-Way Thermal Model Of Asynchronous Traction Engines For Diagnostics Of Their Technical Condition, Zhavkharbek Sulton Ugli Fayzullaev
Journal of Tashkent Institute of Railway Engineers
Mathematical models of the thermal processes of traction induction motors are developed. An induction motor is considered as a thermal system consisting of three bodies (stator winding, stator magnetic circuit and rotor), in which heat transfer is taken into account not only between the respective bodies, but also heat transfer between each body and the environment. It is shown that the steady-state excess of the stator winding temperature of a traction induction motor depends on the multiplicity of the stator winding current, the coefficient of electrical energy loss, and also on the temperature coefficient of resistance of the material of …