Investigating the accuracy of the excess determination at the levelling station basing on the results of multiple measurements

2021 ◽  
Vol 969 (3) ◽  
pp. 2-11
Author(s):  
B.F. Azarov
Keyword(s):  
Reference Points ◽  
The Road ◽  
Road Base ◽  
Road Pavement ◽  
Deterioration Rate ◽  
Base Points ◽  
Wear And Tear ◽  
Multiple Measurements ◽  
Definition Of ◽  
Mean Square Errors

The author considers the accuracy of multiple measuring the excess obtained during the work on geodesic support of the definition of certain road sections surface wear-and-tear degree in the Altai region. Basing on these results in nine cycles for seven federal highways’ sections, the accuracy of determining the excess between the reference points and the roadway points was evaluated. It is noted that at performing the work, the standard deviation measuring excess at the station can serve as a criterion for accuracy. Various options of its calculation are considered, depending on which measurements are taken in joint processing. The analysis of the root-mean-square errors obtained as a result of parsing different variants is performed. It is also noted that the data gathered during the research should be considered at engineering-technical leveling as well as in the process of measuring the values of seasonal road base points’ changes in automobile road sections which are surveyed to define the deterioration rate of the road pavement.

scholarly journals Monitoring of pavement state as a basis for economic regulation of greenhouse gases emissions

2014 ◽  
Vol 46 (2) ◽  
pp. 93-100
Author(s):  
Maria Radkevich ◽  
Abdulkhakim Salokhiddinov
Keyword(s):  
Greenhouse Gases ◽  
Environmental Pollution ◽  
Computer Experiments ◽  
Basic Mechanism ◽  
Economic Damage ◽  
Economic Regulation ◽  
The Road ◽  
Road Pavement ◽  
Greenhouse Gases Emissions ◽  
Definition Of

Abstract Monitoring of pavement state as a basis for economic regulation of greenhouse gases emissions. Road complex which includes a road network with traffic, road services, car repair businesses, and enterprises for the production of fuels and materials for the repair of roads, is an important source of environmental pollution, and the degree of contamination depends on the quality of the road pavement. The present research is aimed to find the interaction between the amount of emissions into the environment from whole road complex and condition of road cover, on creation of a simplified method of determining economic damage from environmental pollution at the road operation and to develop basic mechanism of the economic impact on road services at excess emissions. According to the results of computer experiments mathematical relations of complex road emissions from the evenness of road pavement were obtained. Worked out method of greenhouse (and other) emission inventory permits to determine the total amount of emissions and to identify excess emissions relative to some acceptable level. Definition of economic damage of environmental pollution during road operation can be the basis for determining the amount of ban impositions on road service

scholarly journals Pavement Deterioration Predictive Models for a Section of Ijokodo-Apete Road Ibadan, Nigeria

2019 ◽  
Vol 8 (6) ◽  
pp. 4734-4743
Keyword(s):  
Construction Material ◽  
Research Work ◽  
Traffic Volume ◽  
Volume Data ◽  
The Road ◽  
Road Pavement ◽  
Deterioration Rate ◽  
Reconnaissance Survey ◽  
Deterioration Process ◽  
Pavement Distresses

A road pavement is a structure composed of structural elements, whose function is to protect the natural subgrade and to carry the traffic safely and economically. When the roads are open to traffic, the pavements deteriorate with time due to the combined influence of the traffic, construction material and the environment. Due to the great complexity of the road deterioration process, performance models are the best approximate predictors of expected conditions. Hence, the aim of this research work is to develop a predictive model for the rate of potholes deterioration for a section of the Ijokodo –Apete road in Ido Local Government Area of Ibadan. In actualizing the above aim, a reconnaissance survey and inventory were conducted on the selected road section and potholes were discovered as the predominant pavement distresses, chainages were established for easy identification of the potholes positions, some selected potholes were measured and their volume change was monitored. The pavement structural evaluation and traffic volume data were collected. Regression models were developed for the potholes deterioration rate using SPSS (Statistical package for social sciences) package. Conclusively, the model with the highest coefficient of determinant (R2 ) and least standard error was selected as the reliable model and was used to determine the deterioration rate of the independent variables(traffic volume and structural number) selected at random.

Mechanical effects and paradoxical phenomena in the thermoelastic stress of the road pavement structures

2018 ◽  
pp. 128-145
Author(s):  
Volodynyr Mozghovyi ◽  
◽  
Viktor Gaidaichuk ◽  
Yurii Zaiets ◽  
Liudmyla Shevchuk ◽  
...  
Keyword(s):  
Thermoelastic Stress ◽  
The Road ◽  
Mechanical Effects ◽  
Road Pavement ◽  
Pavement Structures

scholarly journals The use of cement concrete pavements for roads, depending on climatic conditions

2019 ◽  
Vol 13 (3) ◽  
pp. 235-240
Author(s):  
Iryna Solonenko
Keyword(s):  
European Union ◽  
Statistical Models ◽  
Road Network ◽  
The European Union ◽  
Rational Selection ◽  
Cement Concrete ◽  
The Road ◽  
Road Pavement ◽  
Operational Characteristics ◽  
Selection Of

The development of road network infrastructure is an important component of the economic development of the European Union. Updating of the road network contributes to the integration of the economies of countries into a coherent whole. The road network provides the free movement of citizens, the movement of goods and the effective implementation of various services. The increase in the length of the road network leads to an increase in the financial and material costs necessary to ensure its maintenance and repair. One of the ways to reduce costs is by strengthening the physic-mechanical and operational characteristics of the pavement due to the widespread use of cement concrete. The quality of the pavement of cement concrete depends largely on the rational selection of its composition. This allows a significant increase in the durability of road pavement. The purpose of the research was: the development of recommendations for the rational selection of the composition of the road pavement material of cement concrete, aimed at upgrading longevity, and taking into account its frost resistance grade. According to the goal, the following tasks were developed: the analyses of the climatic zones in which the road network of the European Union is located; the development of a research plan, a selection of the response function and influence factors; the study of physico-mechanical and operational characteristics of the researched material of road pavement; on the basis of the obtained data, the calculation of the complex of experimental-statistical models, which describe the physico-mechanical and operational characteristics of the road pavement material; on the basis of experimental statistical models, a method was proposed for selecting the rational compositions of the cement concrete pavement road material depending on the conditions of its application. The results presented in the article can be used in engineering and scientific practice for the selection of road pavement from cement concrete for highways.

scholarly journals The Evaluation of Experimental Variables for Sustainable Virtual Road Safety Audits

2021 ◽  
Vol 13 (11) ◽  
pp. 5899
Author(s):  
Yeonsoo Jun ◽  
Juneyoung Park ◽  
Chunho Yeom
Keyword(s):  
Road Safety ◽  
Traffic Light ◽  
Scenario Development ◽  
Driving Simulators ◽  
Traffic Condition ◽  
The Road ◽  
Road Pavement ◽  
Net Promoter ◽  
Road Safety Audits ◽  
Road Marking

This paper evaluates experimental variables for virtual road safety audits (VRSAs) through practical experiments to promote sustainable road safety. VRSAs perform road safety audits using driving simulators (DSs), and all objects in the road environment cannot be experimental variables because of realistic constraints. Therefore, the study evaluates the likelihood of recommendation of VRSA experimental variables by comparing DSs experiments and field reviews to secure sustainable road safety conditions. The net promoter score results evaluated “Tunnel”, “Bridge”, “Underpass”, “Footbridge”, “Traffic island”, “Sign”, “Lane”, “Road marking”, “Traffic light”, “Median barrier”, “Road furniture”, and “Traffic condition” as recommended variables. On the contrary, the “Road pavement”, “Drainage”, “Lighting”, “Vehicle”, “Pedestrian”, “Bicycle”, “Accident”, and “Hazard event” variables were not recommended. The study can be used for decision making in VRSA scenario development as an initial effort to evaluate its experimental variables.

scholarly journals The Limestone as a Materials Combination of Base Course on the Road Pavement

2021 ◽  
Vol 1125 (1) ◽  
pp. 012019
Author(s):  
Yosef Cahyo Setianto Poernomo ◽  
Sigit Winarto ◽  
Zendy Bima Mahardana ◽  
Dwifi Aprillia Karisma ◽  
Rekso Ajiono
Keyword(s):  
The Road ◽  
Road Pavement ◽  
Base Course ◽  
On The Road

The Philosophy of Sobornost as a Prototype of Ferdinand Tönnies’ “Sociological Conservatism”

2021 ◽  
pp. 49-59
Author(s):  
Nikita K. Siundiukov ◽  
Keyword(s):  
Comparative Analysis ◽  
Reference Points ◽  
Natural State ◽  
The Political ◽  
The Social ◽  
Political Theories ◽  
Definition Of

The article presents a comparative analysis of the theory of Ferdinand Tönnies “Gemeinschaft/Gesellschaft” and the philosophy of catholicity in the works of A.S. Khomyakov and I.V. Kireevsky. The theory of Tönnies is considered in the light of the concept of “sociological conservatism” manifested by A.F. Filippov. It is shown that the conceptual opposition “Gemeinschaft/Gesellschaft” can be seen continuation of the discussion about the “nature of the social”. In this light, the main reference points of Tönnies sociology are the political theories of Aris­totle and Hobbes, with an emphasis on the definition of the “natural state” of man. Based on the analysis of Tönnies theory, it is shown that its comparison with Slavophilism is possible in three parameters: appeal to the factor of sub­stantiality, the dichotomy of “historical” and “non – historical” and the use of the concept of “organic”. It is proved that in the context of a “conservative” reading of the philosophy of sobornost, its argumentation turns out to be mainly political and sociological

Use of soils and recycled industrial products treated with water glass in the road pavement base courses

2021 ◽  
Vol 2021 ◽  
pp. 86-93
Author(s):  
Anatolii Mudrychenko ◽  
◽  
Andrii Hrinchuk ◽  
Ivan Balashov ◽  
Sergey Illyasch ◽  
...  
Keyword(s):  
Blast Furnace ◽  
Sodium Silicate ◽  
Water Glass ◽  
Water Solution ◽  
Road Construction ◽  
The Road ◽  
Road Pavement ◽  
Stone Materials ◽  
Pavement Base ◽  
Local Materials

Introduction. Growing volumes of road construction increase the need to expand and rationally use of raw materials. The need for stone materials can be solved through the wide spread using of local materials, recycled products of industry in the pavement base courses and decreasing the use of natural construction materials by replacing them with alternatives, including soils, slag materials that are metallurgical industry wastes. Experience of ferrous metallurgy slag usage has been accumulated in the road industry of Ukraine. Their usage makes it possible to extend the construction season, increases the strength and reliability of road structures due to their physical and mechanical properties, significantly reduces the road pavement energy consumption, simplifying the technology of works and the estimated cost of road construction. It was determined that the layers of pavement made from blast furnace slag have a high bearing capacity. Slag structures in 5–10 years of hardening are not inferior to, and in 10–20 years surpass cement structures on durability and deformation resistance. However, there is an urgent need to provide strength and open road traffic on the already built road section in a shortest possible term, so there is a need to accelerate the activation of the slow-setting binder. Therefore water glass (water solution of sodium silicate) is used.Purpose. The purpose of the work is to study the feasibility of using the soils and recycled industry products treated with water glass in the road pavement base courses.Materials and methods. Experimental tests of soils and blast furnace slags treated with water glass with different content of water solution of sodium silicate were performed.Results. The feasibility of using the asphalt concrete mixtures on the basis of soils and recycled products of industry treated with water glass in the pavement base courses is determined. Recommendations regarding technological parameters of preparation, transportation, laying and compaction of such mixes are given.Conclusions. Performed studies have shown that the physical and mechanical parameters of soils and blast furnace slags treated with water glass meet the requirements of current regulations of Ukraine. The advantages of use are noted, namely: the possibility of replacement of traditional stone materials by the local materials and recycled products of industry, reducing the transport component in the cost of construction. The obtained results indicate the feasibility of using the soils and recycled products of industry treated with water glass in the road construction.Keywords: soils, recycled products of industry, graded blast furnace slag, water solution of sodium silicate, water glass

scholarly journals Traffic Analysis and Pavement Technology as a Tool for Urban Noise Control

2015 ◽  
Vol 61 (4) ◽  
pp. 107-126 ◽  
Author(s):  
K. J. Kowalski ◽  
A. J. Brzeziński ◽  
J. B. Król ◽  
P. Radziszewski ◽  
Ł. Szymański
Keyword(s):  
Urban Space ◽  
Urban Traffic ◽  
Vehicle Speed ◽  
Noise Emission ◽  
Noise Barriers ◽  
Technical Improvement ◽  
Protection Measures ◽  
The Road ◽  
Road Pavement ◽  
Acoustic Conditions

Traffic related noise is currently considered as an environmental pollution. Paper presents results of multidirectional study attempting to serve urban traffic without the need to erect noise barriers interfering urban space. Initial concept of the road expansion included construction of 1000 m of noise barriers dividing city space. Improvement in the acoustic conditions after construction completion is possible due to the applied noise protection measures: vehicle speed limit, smooth of traffic flow, use of road pavement of reduced noise emission and the technical improvement of the tramway.

An Alternative Perspective on Recruitment Overfishing and Biological Reference Points

1987 ◽  
Vol 44 (4) ◽  
pp. 913-918 ◽  
Author(s):  
M. P. Sissenwine ◽  
J. G. Shepherd
Keyword(s):  
Fisheries Management ◽  
Reference Point ◽  
Reference Points ◽  
Fishing Mortality ◽  
Alternative Perspective ◽  
Conventional Models ◽  
Definition Of ◽  
Yield Per Recruit ◽  
Spawning Biomass

Biological reference points are used to guide fisheries management decisions. The reference points most often used are expressed in terms of fishing mortality rate (F). Fmsy relates to the maximization of sustainable yield. In principle, it is a most useful reference point, but in practice it is difficult to estimate. Fmax and F0.1 relate to certain levels of yield per recruit and are easily estimated, but they ignore conservation of the resource. Recruitment overfishing has usually been understood to occur when a population has been fished down to a point where recruitment is substantially reduced or fails. It has not been used as a basis for a biological reference point because the definition is vague and cannot be readily related to fishing mortality. Levels of spawning biomass below which recruitment seems to be reduced have been used, but their determination from available data is usually difficult and controversial. We propose an alternative definition of recruitment overfishing in terms of the level of fishing pressure that reduces the spawning biomass of a year class over its lifetime below the spawning biomass of its parents on average. Conventional models and types of data can be used to determine this level of F, denoted as Frep, which clearly relates to the replacement of spawning biomass and thus to sustainability of a population and yield in the long term.

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