Abstract:The article presents the results of the analysis of the coverage of public roads of federal and regional significance by permanent reference (base) stations. The approaches to providing a common coordinate space for creating digital model of public roads of federal and regional significance are determined.
Keywords:roads, digital model, base stations, geodetic networks, coordinate systems, differential measurements.
Abstract:The article dwells upon the problems of regulatory and methodological support for road subgrade design in karst territories, as well as the difficulties concerning the anti-karst measures assignment. The potential of monitoring works to increase the effectiveness of anti-karst protection and to provide the safety of road structures under condition of traditional organization of observations is analyzed.
Abstract:The article deals with the definition of the tasks that should be solved using road GPR (ground-penetrating radars). Based on the analysis of the technical characteristics of foreign ground-penetrating radars and realized comparative tests of various designs of ground-penetrating equipment, the qualitative and quantitative requirements for road ground-penetrating radars are formulated.
Abstract:The method for estimating the parametric reliability of the roadbed when taking into account the random nature of the input factor (relative humidity) and determining the probabilistic characteristics of the output parameter (roadbed settlement) by statistical linearization is proposed. The failure criteria for an embankment designed according to the second principle in the permafrost region are formulated. The application of this method is illustrated by a specific example. Taking into account the variability of even one factor considered as a random variable, in the example a very low value of the probability of failure-free operation has been derived, although from the standpoint of the normative methodology in the deterministic setting, the criterion of the embankment stability is fulfilled. The values of the normalized probability of the roadbed failure-free operation are proposed.
Keywords:embankment base, slope stability, second principle of design, permafrost soils, failure criterion, probability of failure-free operation.
EXPERIENCE IN ELIMINATING WEAR RUT ON THE EXAMPLE OF ROADS IN THE SVERDLOVSK REGION
Нead of Department V.V. Danilov,
Ph. D (Tech.) A.A. Tsarikov
(State Treasury Institution
for the Sverdlovsk Region «Department of Roads»)
Contact information: firstname.lastname@example.org
Abstract:The article deals with the formation of a rut on the roads of the Sverdlovsk region under the influence of studded tires. Data on the wear resistance of various types of pavements are considered. Recommendations for eliminating wear rut on roads of different categories with various traffic volumes are given.
Abstract:The article deals with the issues of improving quality, productivity and safety of road maintenance based on the implementation of measures to increase the automation level of technological equipment, installed on road machines. The classification of the automation levels of technological equipment of road machines is a methodological basis for the development of an industry «roadmap» for the implementation of measures in this sphere. Two main ways of automation, in particular automation of road vehicle chassis control and automation of the operation of the technological equipment installed on the road vehicle are considered. The results of the realized classification of the automation levels of technological equipment of road machines are presented.
MEASURING THE RUT DEPTH OF ROAD PAVEMENT BY LASER SCANNING METHOD
Ph. D. (Tech.) N.A. Lushnikov,
Ph. D. (Philology) T.I. Lalova
(Russian University of Transport (MIIT)),
Ph. D. (Tech.) P.A. Lushnikov,
Engineer D.I. Kovalev
Contact information: email@example.com; P.firstname.lastname@example.org
Abstract:The article considers some methods of processing the measurements data of the road pavement transverse profile obtained by laser scanning. The comparative analysis results of measurements are done.
METHOD FOR INCREASING THE ACCURACY OF ACCOUNTING THE IMPACT OF TRAFFIC FLOW ON ROAD PAVEMENT STRUCTURES
Ph. D. (Tech.), Associate Professor
Engineer V.A. Dumenko
Ph. D. (Tech.) O.V. Konoreva
(Don State Technical University (DSTU))
Contact information: email@example.com
Abstract:The article provides methods for processing and analyzing data on cargo traffic flow in order to design road pavements and estimate their remaining service life. The research is based on information from automatic weight and dimensional control stations (Weigh-in-Motion (WIM) systems) located in different regions of the Russian Federation and installed on roads of different categories, designed for various design loads. The authors propose to assign the classification of vehicles in accordance with the Procedure for carrying out weight and dimensional control as the main one due to the most detailed differentiation of vehicles by their types. In addition, it is recommended to introduce a certain order of synthesis of data on traffic flow over a long period of time to simplify the algorithm of calculating the conversion coefficients that are unique for each road section. As an example, the coefficients of conversion to design loads were calculated by processing of data from more than 20 WIM systems.
Abstract:The prospects for creating a network of automatic points of weight and-dimensional control (APVGK) in the Russian Federation and design features of weight measuring sensors for weighing vehicles in motion (WIM systems) are discussed in the article. Some possible ways of regulating performance requirements for road pavements in the APVGK zone (longitudinal and transverse evenness) with ensuring the required weighing accuracy of moving vehicles are analyzed.
Keywords:automatic point of weight-and-dimensional control (APVGK), WIM-systems, weighing accuracy, road pavement, longitudinal evenness, transverse evenness (rutting).
USING PROJECTION MARKING ON ROADS IN THE SVERDLOVSK REGION TO IMPROVE THE VISIBILITY OF UNREGULATED PEDESTRIAN CROSSINGS
Нead of Department V.V. Danilov,
Ph. D. (Tech.) A.A. Tsarikov
(State Treasury Institution
for the Sverdlovsk Region
«Department of Roads»)
Contact information: firstname.lastname@example.org
Abstract:The article presents data on the analysis of road accidents involving pedestrians on the roads of the Yekaterinburg agglomeration. The main causes of these accidents are considered and the measures to eliminate them are proposed.
COLD RECLAIMED MIXES BASED ON ASPHALT GRANULATES FOR CONSTRUCTION OF UPPER LAYERS OF ROAD PAVEMENTS
Doctor of Science (Tech.), Professor
Ph. D. (Tech.) V.V. Zankavich
(Henan Gaoyuan Highway Maintenance Technology Co. Ltd.),
Chief Executive Officer E.O. Zaytsev, Head of Section, Master of Science (Tech.) S.V. Lira,
Deputy Head of Section, Master of Science (Tech.) I.G. Nasonova
(State Government Institution of the Krasnodar Region «Krasnodaravtodor»), Research Scientist, Master of Science (Tech.) Shang Bo,
Deputy Head of Section, Master of Science (Tech.) Hou Dehua
(Henan Provincial Key Laboratory of Highway Detection and Maintenance) Contact information: email@example.com
Abstract:In this article the methods of modifying concretes based on organohydraulic binders by water dispersions of epoxy resin and styrene-acrylates are considered in terms of achieving by them the design characteristics of typical asphalt concretes. A new method for evaluating the properties of this type of concretes to cyclic loading and fatigue accumulation is also proposed.
Keywords:fatigue resistance, cyclic stability, asphalt granulate, modified cold reclaimed mix, structural strength, styrene-acrylic water dispersion, water dispersion of epoxy resin, epoxidized soybean oil.
Abstract:The article presents the results of assessing the conformity of the actual PG characteristics of bitumen binders to the required climatic conditions for 41 samples from 17 territories of the Russian Federation. It is revealed that according to the most optimistic estimate, only about a quarter of the samples of bitumen binders corresponds to the climatic conditions of their use. The method of assessing the impact of the use of bitumen binders, the PG characteristics of which do not correspond to climatic conditions, on the expected interrepair period of asphalt pavement is considered.
Keywords:bitumen binder, upper limit of PG characteristic, lower limit of PG characteristic, actual PG characteristic, required PG characteristic, reliability of determination of maximum and minimum temperatures, total probability of occurrence of worse (more severe) climatic conditions over the expected service life
Abstract:The article deals with new testing methods designed to wear resistance control of coarse aggregate of asphalt concrete mixtures used in pavements upper layers in the Russian Federation. The research carried out by State Public Institution «Glavtatdortrans» to analysе these methods and road materials based on collected statistic data is reported.
The results of assessing the existing methods for wear resistance control of stone aggregate (Micro-Deval test, Nordic-Test test) and their verification are considered. The shortcomings of these methods are revealed and the recommendations for their elimination are done. The main factors influencing the wear resistance of coarse aggregate of asphalt concrete mixtures and methods of their assessment are analyzed.