Introduction. Russia has a large spatial disunity of settlements and other objects. Therefore, it is irrational to use low-productivity technical means of cyclical action in the construction of roads. To increase the pace of road construction, improve quality, reduce energy costs for road construction, where relief allows, it is economically feasible to use a set of units of continuous action. Continuous action units, moving one after another, will consistently perform a set of works, carrying out the full construction of the road by flow method. The complex should have a continuous action unit to form a underlying layer. To create complex units, their theoretical justification is necessary. In order to determine the geometric and dynamic parameters of the loading part of the unit to form the underlying layer, the process of moving the bucket filled with soil before it is unloaded is considered.

The method of research. Based on the constructive layout of the loading part of the unit, the process of moving the bucket filled with soil before it is unloaded is divided into the stages: vertical ascent, moving in the direction of the leading star of the upper drive, two phases of the bucket rotation on the leading stars of the upper drive, moving from the moment of the end of the turn on the leading star of the upper drive to the start of the turn on the lower turn. When the bucket moves vertically up, the ground is no for dumped. Graphically, this angle of the bucket is chosen when it moves in the direction of the leading star of the upper drive, at which the ground will not fall out of the bucket. Two phases of the bucket rotation on the leading stars of the upper drive and moving the bucket from the moment of the end of the turn on the leading star of the upper drive to the moment of the turn on the lower turning roller are considered. The necessary parameters dependencies have been deduced.

Results. Based on the developed methodology, the geometric and dynamic parameters of the loading part of the unit are defined. In particular, the torque of the top drive, the angular velocity of the drive sprockets, the power required for the top drive, the transmission ratio from the hydraulic motor to the sprockets are calculated. Based on the power transferred, a hydromotor was selected for the upper drive of the unit.

Conclusion. The calculations reveal the maximum traction force of all buckets during their travel to discharge the soil, the torque of the top drive, the angular velocity of the top drive sprockets and the power required for the top drive. It is advisable to use for the upper drive of the unit gerotor hydromotor MT-160 and two-stage planetary gearbox. The calculations made it possible to develop the design of the elements of the loading part of the continuous action unit to form the underlying layer of roads.

Introduction. As a result of the analysis of statistical data on the number of road accidents that occurred with the participation of personal mobility equipment (PME), the main measures to reduce the considered indicator – accident rate are identified. A wide variety of individual means of transportation, which today is typical for many cities of the Russian Federation and is more prevalent in metropolitan cities, leads to a number of problems, including accidents. In order to develop targeted measures necessary to eliminate the problems that arise, it is necessary to develop a specialized classification system that will allow you to assign PME to a certain category, taking into account the main characteristics and, on the basis of this, to develop the necessary requirements for the movement of various categories of PME in an urban environment.

Methods and materials. Increasing the attractiveness of individual vehicles in view of their accessibility and environmental friendliness leads to an increase in their number in the urban environment, which provides prerequisites for changing the urban transport infrastructure and developing certain requirements for their safe movement.

Results. The authors analyze the main classification systems of PME and determine the possibilities of their application for the subsequent solution of related problems that arise when driving PME in an urban environment.

Conclusion. As a result of the analysis of classification systems, a modified classification system is proposed, based on a minimum set of classification features, which allows you to assign different types of PME to one of the proposed classification group according to a certain weight and power characteristics. The ways of further research in this area are determined.

Introduction. The current methodology for fuel consumption accounting in road vehicles has not been changed in terms of its quality for a long time. In the majority of transport enterprises of the Cheliabinsk Region, official methods for the regulation of fuel consumption are not used, which indicates the need to improve the fuel consumption accounting standards. The most significant differences between standardized and real consumption are related to transport work.

Purpose of the experiment. The article aims to carry out a statistical analysis of the influence of cargo weight on fuel consumption in long-distance transport.

Results of the experiment. In order to identify the dependence of cargo weight on fuel consumption in longdistance transport, a study is conducted on the statistical data on the operation of truck tractors at OOO Alliance Auto, one of the largest long-distance road carriers in the Cheliabinsk Region. The study is conducted on MercedesBenz Actros-1840 truck tractors equipped with fuel consumption monitoring devices and devices for determining axle loads. The cargo weigh is determined by subtracting the curb weight from the actual one according to the axle load data. Data on the values of the actual cargo weight and fuel consumption for each trip are recorded using the Fleet Board software and hardware complex; Excel and STATISTICA programs are used to calculate and construct the necessary graphs and regression equations. The statistical analysis performed makes it possible to establish the nature and indicators of the dependence of fuel consumption on cargo weight in long-distance transport. As a result, the relationship between the flow rate and the cargo weight is established; a confidence test is performed; and a regression equation is obtained.

Conclusion. Analysis of the collected data shows that the dependence of fuel consumption for transport work by road trains with truck tractors Mercedes-Benz Actros-1840 on the cargo weight for the Russian operating conditions in long-distance transport is linear and amounts to 0.39 liters per 100 km for each ton of transported cargo.

Introduction. This paper shows the results of a study of the frequency of maintenance of passenger cars in various operating conditions, and provides recommendations for replacing the engine oil of gasoline engines (category SN classification according to API) according to the actual engine operating time (moto-hours). The service book of passenger cars contains the regulations for car maintenance with a list of operations that must be performed. The oil change intervals specified in the Regulations on Maintenance and Repair of Rolling Stock of motor Transport and the factory instructions do not take into account the specifics of the operation of vehicles. Depending on the road and climatic conditions and the operating mode, the standard maintenance schedule can be adjusted, in particular, the frequency of engine oil changes. The scientific novelty of the work is to determine the intervals of car maintenance for specific operating conditions.

Materials and methods. The paper presents an analysis of Russian and foreign car maintenance systems, in particular, the oil change intervals of gasoline engines in European countries, the United States and Japan.

The results of operational and resource tests of motor oils of gasoline engines carried out by methods of measuring their physical and chemical properties are presented.

Results. In this paper, based on the analysis of the problem, recommendations for changing oil in gasoline engines by motorcycle hours for the conditions of the Republic of Dagestan (RD) are developed.

The use of external and built-in technical means for calculating the motor hours allows you to determine the recommended oil change interval.

Discussion and conclusion. In this paper, on the basis of research on a certain number of vehicles operating in various (including difficult) conditions, recommendations are developed that allow you to determine the rules of car maintenance for various operating conditions.

Introduction. A quarter of the world’s natural gas and oil reserves are located in the Far North of the Russian Federation. Only with reliable and efficient transportation support is it possible to successfully develop and exploit deposits in hard-to-reach areas. The main factor in increasing the efficiency of road transport and reducing the transport component in the cost of oil and gas is the growth of productivity of vehicles. The paper considers and analyzes the sources of productivity growth of the mobile unit (MU). The characteristics of the organization of work of winter roads in the Yamalo-Nenets Autonomous District (Yamalo-Nenets Autonomous Area) are considered. Winters are characterized by three main characteristics: operation duration, location, use of season duration. The activities of one of the major carriers, IE (individual entrepreneur) V.N. Anokhin, have been analysed. The carrier serves six major deposits and four material supply bases. It is highlighted that the main range of transportation is steel pipes. The transport problem was solved in which consumers were optimally assigned to pipe suppliers. For calculations, the route Korotchaevo base was chosen the Pyakyakhinskoye deposit, with a traffic volume of 2800 tons. Rolling stock was selected, the optimal method for placing pipes on the MU platform was found. The minimum number of rides for transporting the entire volume of pipes has been determined. A technological design and technological schemes for the transported cargo have been developed. The influence of technical and operational indicators on the performance of MU; The economic effect of the proposed activities is calculated.

Materials and methods. The work explores the technology and organization of pipe transportation on routes to the conditions of the Far North of the Russian Federation. In order to increase the efficiency of road transport, we used the methodology for choosing a rational rolling stock and a method for placing pipes on the MU platform; methodology for determining the optimal number of rides for the transportation of a given volume of pipes; methodology for assessing the impact of technical and operational indicators on the productivity of MU.

Results. The economic effect of the implementation of the optimal technological scheme and the organization of pipe transportation in the conditions of the Far North of the Russian Federation is 38,846 rubles per trip. The transportation on an improved winter road allows the use of higher-capacity MU (37 tons) and makes it possible to transport at an increased average speed of up to 20 km/h. Recommended activities allow to increase the productivity of MU from 0.287 t/h to 1.156 t/h.

Discussion and conclusions. Measures were developed to improve the efficiency of road transport in the Far North of the Russian Federation. The results of the work are used in the organization of transportation of pipes on the enterprise under consideration.

Introduction. Driving at a speed exceeding the permitted and average speed of traffic flow often leads to a collision of vehicles with other road users or with elements of the arrangement of highways. As a result, it is necessary to establish whether the fact of this violation of the traffic rules, which led to the occurrence of an emergency-dangerous road traffic situation. The methods used to calculate the speed of vehicles based on the resulting deformations are quite accurate, but this fact is true in conditions of complete overlap (impact across the entire width of the front, rear or side parts of the body). But there is a scientific task of developing a methodology according to which an expert or investigator will be able to calculate the average statistical value of measuring the depth of deformation of a vehicle for a specific road traffic situation.

Materials and methods. The paper proposes a method for evaluating the possibility of using the data available to the expert for calculation by introducing the coefficient of variation of the depth of penetration. With the help of the coefficient of variation, the specialist has a tool for selecting and ignoring individual measurements of the depth of penetration, depending on the degree of overlap and on the ‘spread’ of the deformation values.

Conclusions. After studying a number of collisions with incomplete overlap and excluding the ‘extra’ values of penetration, the speed equivalent to the energy cost for the development of residual deformations and errors (the difference between the true collision speed and the established one without taking into account the ‘falling out’ values of deformations) was calculated and it was found that the use of the algorithm taking into account the coefficient of variation led to sufficiently accurate calculation results.

Discussions. The proposed methodology regulates the use of the coefficient of variation as a criterion for the admissibility of the use of source data to determine the quality of the final result of the calculation. This mathematical device is applicable to all collisions, but is especially relevant when studying collisions with incomplete overlap of any part of the car body.

Introduction. This article discusses the possibility of expanding the colour palette of a ceramic shard. Due to the shortage of high-quality clay raw materials for the manufacture of plastic molded facing bricks, the problem of manufacturing ceramic wall materials by semi-dry pressing from low-quality clay rocks is urgent.

Materials and methods. The main raw material was non-caking clay raw material with a low content of clay and a high content of silt particles. Some corrective additives were used to expand the colour palette of ceramic bricks. In the article, the authors used both standard methods for determining the physical and mechanical properties and modern methods for studying the phase composition of materials.

Results. The possibility of enriching the colour range of a ceramic shard based on non-sintered clay raw materials has been experimentally confirmed, provided that the mixture contains flux additives. When receiving products with a clarified shard, light-colored flutes should be used.

Conclusion. The possibility of enriching the colour range of a ceramic cap by adding white-burning clay, introducing bleaching and chromophore additives and technogenic products has been established. Due to the differences in the chemical composition of clay raw materials from individual deposits, an individual approach to each of them is required.

Introduction. The article studies the strength of hardened ash-soil materials, with different ratios of pond ash, natural clay soil and lime in various proportions when adding a stabilizing additive “Sattelit”.

Materials and methods. As part of the study, tests were carried out to determine the maximum density of dry soil and the optimal mixture of ash-soil materials (100% ash-and-slag mixture, 25% ash-and-slag and 75% loam and 50% ash-and-slag and 50% loam), and the subsequent determination of the ultimate strength for uniaxial compression at age seven, twenty-eight and ninety days. The samples were gaining strength in the normal hardening chamber. The samples are placed in a device for capillary water saturation of the samples.

Results. As a result of the study, a regularity of the increase in the strength of the soil-ash mixtrues was revealed, depending on the amount of binder, the proportion of materials and the age of the mixture. It was also revealed that with an increase in the dosage of clay soil in the pond ash, the strength of the obtained soil-ash mixtrues sharply increases.

Discussion and conclusion. The results of the studies carried out show the potential possibility of using zoological soil materials fortified with lime when installing an additional layer of the base of highways with capital or lightweight pavement on roads in the I-V road-climatic zone. However, additional research is required to determine the frost resistance and water resistance of zoological soil composites reinforced with lime.

Introduction. Composite materials are used in the construction of transport infrastructure facilities, buildings and structures for various purposes, in housing and communal services. Calculation of structures made of composite materials is used in the field of stress-strain state, buckling, analysis of material under tension, the effect of cracks on the state of these structures. The main properties of composite materials and a method of manufacturing a cylindrical shell structure from a composite material are considered. The total number of winding options is calculated using the combinatorial method.

Materials and methods. A composite cylindrical shell with a radius of R = 300 mm and a height of H = 600 mm was chosen as the object of research. The creation of a model of a cylindrical shell in a finite element analysis package is described. An axial compressive load acting on the shell with a force of F = 100 kN is specified. Determination of the critical force ratio.

Results. The results of the analysis of the loss of stability of the cylindrical shell are obtained and the graphs of the dependence of the critical force on the options for laying the layers are presented. Depending on the magnitude of the critical force and the form of buckling, the most and least favorable options for laying layers in a composite material package have been determined.

Discussion and conclusions. A conclusion is made of the dependence of the critical force on the combination of stacking layers in the composite.