scholarly journals ANALYSIS AND JUSTIFICATION OF NORMATIVE SUPPORT OF EARTH DESIGN DESIGN IN COMPLEX ENGINEERING AND GEOLOGICAL CONDITIONS

2021 ◽  
Vol 6 (166) ◽  
pp. 81-87
Author(s):  
A. Batrakova ◽  
Y. Dorozhko ◽  
E. Zakharova
Keyword(s):  
Traffic Accidents ◽  
Road Construction ◽  
Road Surface ◽  
National Standard ◽  
Normative Documents ◽  
The Road ◽  
Traffic Conditions ◽  
Road Design ◽  
Geological Conditions ◽  
Complex Engineering

Designing of a ground cloth is the most responsible stage as destruction or inadmissible deformations of a ground cloth connected with design errors lead to decrease in reliability of all constructive elements of highways, increase in expenses for maintenance of a standard technical and operational condition of road clothes, culverts, elements. arrangement, etc. Insufficient strength of the ground structure is one of the causes of deformations and destruction of the structure of the pavement, which leads to deteriorating traffic conditions, increased damage from traffic accidents, increased cost of transportation and more. At the same time, the normative documents on road design do not contain any regulations on the procedure and methods of calculating the road surface in difficult conditions (on weak, subsidence soils, in rocky soils). Therefore, in order to further develop the list of mandatory calculations during the design of the ground, it is necessary to analyze and generalize the regulatory framework for the construction of the ground of public roads, to determine the requirements for the design of the ground in complex engineering and geological conditions. The purpose of this study is to generalize the regulatory requirements for the design of the ground of public roads in complex engineering and geological conditions. According to the results of the analysis, it is established that in the normative documents on the design of the road surface in difficult engineering and geological conditions there is no regulation on the procedure and methods of calculating the road surface in difficult conditions (on weak, subsidence soils, in rocky soils). Therefore, there is a need to develop a national standard for the design of the road surface. In the future it is necessary to summarize the existing methods of calculating the road surface, to develop a list of mandatory calculations during the design of the road, to establish requirements for the principles and procedures of road construction, to determine the boundary conditions of the road and their criteria.

scholarly journals NEURAL FUZZY NETWORK FOR ASSESSING TECHNOLOGICAL SOLUTIONS FOR FOREST ROADS

2020 ◽  
Vol 10 (3) ◽  
pp. 95-103
Author(s):  
Vladimir Pobedinskiy ◽  
Sergey Buldakov ◽  
Andrey Berstenev ◽  
Elena Anastas
Keyword(s):  
Neural Network ◽  
Intelligent Systems ◽  
Information Technologies ◽  
Rapid Assessment ◽  
Road Construction ◽  
Road Surface ◽  
Forest Roads ◽  
The Road ◽  
Logging Roads ◽  
Fuzzy Network

The article is devoted to the problem of improving road construction technologies, in particular, technological solutions for logging roads. As you know, in road construction, the choice and justification of technological solutions for the road surface is one of the first stages of design, the efficiency of which affects further project as a whole, timing and costs of construction. The solution to such a problem is extremely difficult and, first of all, due to the many interrelated parameters, factors, as well as the uncertainties of data in the problem. The task becomes much more complicated when it is also necessary to take into account the economic indicators of road construction project. But it is in this form that it is of the greatest interest, since these characteristics are often the most important in practice. For these reasons, the problem remains completely unsolved. Therefore, requires further research, as noted, taking into account the uncertainties in the problem. Intelligent systems based on the theory of fuzzy sets, neural networks and their hybrid solutions are proposed for this class of problems, as a result of modern achievements in the field of mathematics and information technologies. Thus, the purpose of this research was to develop a neural network for evaluating technological solutions for logging roads. The result of the research was the development of an adaptive neuro-fuzzy network such as ANFIS, which allows calculating the cost of the road surface depending on the main technological and initial financial parameters. The neural network can be recommended for the design of forest roads, as well as for rapid assessment of the effectiveness of various technological solutions during competitive (tender) selection.

scholarly journals Non-autoclaved foam concrete for layers of highways surface dressing

2020 ◽  
Vol 2020 (2) ◽  
pp. 35-41
Author(s):  
Iryna Hornikovska ◽  
◽  
Vadym Kahanov ◽  
Keyword(s):  
Operating Cost ◽  
Road Construction ◽  
Road Surface ◽  
Transport Infrastructure ◽  
Foam Concrete ◽  
Insulating Material ◽  
The Road ◽  
Effective Heat ◽  
Geographical Regions ◽  
Pavement Structure

The article is devoted to the problems associated freeze with the calculated estimation of the parameters of the structural and heat-insulating antifreeze layer in the subgrade of non-rigid roads on various soil bases. The main physical, technical and deformation characteristics of monolithic dispersed non-autoclaved foam concrete reinforced with polypropylene fiber of grades of density from 600 to 1000 kg/m3 are investigated. Freezing of subsoil waters directly under the roadway pavement and, as a result, its increase in volume, leads to significant deformations of the road surface. Under such conditions, the period of defectfree operation of the roadway pavement is significantly reduced, which in turn leads to the need to repair it in a more intensive mode. One of the ways to reduce the operating cost and maintenance costs of the road transport infrastructure is to introduce into the design and construction practice new structural concepts for road surface dressing that ensure high quality pavement during the normative operational period. This can be achieved by introducing an effective heat-insulating material into the pavement structure as an anti-frost layer in order to elimi-nate the effect of frost lift of the roadway pavement of non-rigid roads. Since domestic and foreign experience freeze in the road construction has proven the effectiveness of the use of heatinsulating materials in the road surface dressing construction, in recent years in Ukraine there has been increased interest in the use of non-autoclaved foam concrete as a modern and highly effective heat-insulating material in road construction. The installation of a heat-insulating layer made of non-autoclaved foam concrete allows us to completely or partially prevent freezing or overheating of the surface dressing base, reduce the influence of periodic variations in environmental temperature, which in turn will increase the durability of the pavement structure. The publication presents nomograms for determining the optimal thickness of the heat-insulating anti-frost heavy course (layer) of road surface dressing (based on sand, loamy sand, clay and loam) done at the street and road network for all climatic and geographical regions of Ukraine.

scholarly journals Alingment of braking performance for truck and trailer as an important factor in road construction

2021 ◽  
Vol 1203 (3) ◽  
pp. 032085
Author(s):  
Andrej Haring
Keyword(s):  
Traffic Accidents ◽  
Road Construction ◽  
Reference List ◽  
Braking Performance ◽  
The Road ◽  
Start Up ◽  
Braking Distance ◽  
The Stability ◽  
Internal And External Factors

Abstract Alingment of braking performance of truck trailer is an important parameter that affects its braking stability. This shows particular in critical situations or during braking on a surface with reduced adhesion. Alingment of braking performance can be automatic, which is one of quality of electronical brake systems. Further on, can be forcible, which is being executed during service a diagnostic work.This contribution is focused on analysis alingment of braking performance. Describing technical conditions, internal and external factors which affect it. Due to magnitude of this problematics, is in this article evaluated the optimization of braking affects truck trailers in the start-up phase. The analysis of the process – start-up braking effect has justification from the reason, that has primary influence on the stability truck trailer during braking and this can be the cause of collision situations or also traffic accidents. The parameter of alingment of braking performance has a primary influence on the braking stability of the truck trailers, which significantly affects road safety and is also important for the economy of the truck trailers. your abstract here… The abstract should include the purpose of research, principal results and major conclusions. References should be avoided, if it is essential, only cite the author(s) and year(s) without giving reference list. Prepare your abstract in this file and then copy it into the registration web field. Braking distance is an important factor in the road construction. Therefore, it must be taken into account when designing these buildings.

scholarly journals DEVELOPMENT OF AN APPROACH TO DETERMINATION OF COUPLING QUALITIES OF ROAD COVERING USING WEATHER-CLIMATE FACTOR

2020 ◽  
pp. 1-7
Author(s):  
Anastasia Shevtsova ◽  
Alexander Novikov
Keyword(s):  
Road Safety ◽  
Traffic Management ◽  
Traffic Accidents ◽  
Road Surface ◽  
Climate Factor ◽  
The Road ◽  
Weather And Climate ◽  
Object Of Study

Assessing the grip of the road surface is an extremely important task both in the field of traffic management, and in the field of investigation and examination of traffic accidents. The coupling quality of the road surface is fully ensured by the grip coefficient, which is subject to constant monitoring in order to ensure road safety. There are a large number of methods for determining the magnitude of the grip coefficient. In their study, the authors propose an improved approach for determining the investigated value using the weather and climate factor. Previously, a group of researchers in the course of scientific research determined the dependence of the grip coefficient on the temperature of the road surface, as a result of mathematical analysis, the authors obtained a dependence that allows to determine the studied value by air temperature and the condition of the road surface (presence of precipitation). The performed experiment allowed us to test the obtained dependence within the framework of the object of study and to make a comparative assessment of the results obtained with the data obtained using the road laboratory.

scholarly journals Ensemble Mode and Singular Value Based Road Texture-Skid Study

Coatings ◽  
2021 ◽  
Vol 11 (8) ◽  
pp. 947
Author(s):  
Tuo Fang ◽  
Runhua Guo ◽  
Youqiang Si
Keyword(s):  
Goodness Of Fit ◽  
Traffic Accidents ◽  
Surface Friction ◽  
Singular Value ◽  
Road Surface ◽  
Data Matrix ◽  
Mean Deviation ◽  
Intrinsic Mode Functions ◽  
Important Indicator ◽  
The Road

Traffic accidents occur frequently every year. Skid-resistance performance is an important indicator in evaluating road safety. In this paper, the road surface texture information is obtained by a line laser scanner. The original two-dimensional (2D) signal is decomposed into eight intrinsic mode functions by complementary ensemble empirical mode decomposition (CEEMD). Eight intrinsic mode functions compose an 800 × 8 data matrix. The matrix is decomposed by singular value decomposition (SVD), and singular value vectors are obtained. The singular values are summed and linearly fitted to the friction value measured by the British pendulum friction meter. The study finds that the singular value sum of one to five has a good linear correlation with the friction value with the goodness of fit greater than 0.8. At the same time, contour arithmetic mean deviation Ra is applied for verification. The results show that the singular value sum has a strong correlation with Ra. When the number of Intrinsic Mode Function (IMF) decomposition is greater than eight, there is a good correlation between the number of IMF and the friction value from IMF2 to IMF6. When the number of IMF decomposition is less than eight, the singular value sum numbers with R2 more than 0.8 gradually decrease. It is suggested that the road surface friction performance can be estimated by solving the singular value of the 2D signal. It provides new technical support for the detection and evaluation of anti-skid performance.

scholarly journals Minimizing Shadow Area in Mountain Roads for Improving the Sustainability of Infrastructures

2021 ◽  
Vol 13 (10) ◽  
pp. 5392
Author(s):  
José Ángel Aranda ◽  
María Moncho Santonja ◽  
MÁ Gil Saurí ◽  
Guillermo Peris-Fajarnés
Keyword(s):  
Traffic Accidents ◽  
Three Dimensions ◽  
High Mountain ◽  
Design Elements ◽  
The Road ◽  
Road Design ◽  
Shadow Area ◽  
Road Section ◽  
Solar Lighting ◽  
Geometric Elements

The lack of sunlight on mountain roads in the wintertime leads to an increase in accidents. In this paper, a methodology is presented for the use of sunny and shady areas to be included as a parameter in road design. The inclusion of this parameter allows for the design of an iterative method for the projected infrastructures. The parameterization of the road layout facilitates the possibility of applying an iterative process of modifying the geometric elements that constitute it, examining different layout alternatives until a layout is achieved in which the surface area in the shady area is minimized, increasing the road safety and minimizing environmental impact. The methodology has been defined, generating and analyzing the results of the solar lighting study using a file in IFC format capable of integrating with the rest of the design elements (platform, signaling, structures, etc.) and thus obtaining a BIM format which allows the model to be viewed in three dimensions and moves towards 4D and 5D. The model used for the study was a high mountain road located in the province of Teruel (Spain). It is a road section characterized by successive curves in which several traffic accidents have occurred due to running off the road, partly because of the presence of ice on the platform.

scholarly journals LANDSLIDE AT TSAKONA AREA IN ARKADIA PREFECTURE. GEOLOGICAL CONDITIONS AND ACTIVATION MECHANISM

2004 ◽  
Vol 36 (4) ◽  
pp. 1862
Author(s):  
Λ. Σωτηρόπουλος ◽  
E. Λυμπέρης ◽  
Α. Σιγάλας ◽  
Α. Ντουρούπη ◽  
Κ. Προβιά ◽  
...  
Keyword(s):  
Lower Cretaceous ◽  
Upper Cretaceous ◽  
Road Construction ◽  
Upper Jurassic ◽  
Activation Mechanism ◽  
Tectonic Deformation ◽  
The Road ◽  
Geological Conditions ◽  
Geological Factors ◽  
Geological Formations

The geological conditions of the landslide's area, at Tsakona, in Arkadia Prefecture, are examined, as well as the factors that influenced the landslide's evolution. The landslide occurred at a distance of 15 km south of Megalopoli, on the New Highway, connecting Tripoli to Kalamata and constitutes one of the larger road landslides that have ever taken place. It occupies an area of a length of 1200m and a width of 300m. Geotectonically the landslide's region is placed in a block of the Pindos zone, thrusted on the Gabrovo-Tripoli zone. The geological formations that comprise the closer geological frame, consist of the formation of "First Flysch", Upper Jurassic - Lower Cretaceous and of the Upper Cretaceous limestones. The geological factors that drastically influenced the landslide's activation are lithological, tectonic, hydrogeological and morphological. The mainly siltstone lithology of the flysch, the intense tectonic deformation that occurred during the alpidic horogenetic phase, the morphological depression that is formed by the landslide's region and the large quantities of groundwater supplied by the uphill limestone, are the main geological reasons that activated the landslide. It should be emphasised that the activation and evolution of the landslide were greatly influenced by human activity during the road construction.

Potential of Road Rainwater Harvesting in Yemen – Its Social, Environmental and Economic Benefits: A Case Study of Sana›a – Hodeida Road, Yemen

2020 ◽  
Vol 25 (1) ◽  
pp. 23-64
Author(s):  
Abdullah A. Al-Maswari ◽  
Sharafadeen A. Saleh ◽  
Fadhl A. Al-Nozaily ◽  
Mohammed A. Al-Abyadh
Keyword(s):  
Rainwater Harvesting ◽  
Water Rights ◽  
Economic Benefits ◽  
Road Surface ◽  
Research Approach ◽  
Water Harvesting ◽  
The Road ◽  
Road Design ◽  
On The Road ◽  
Almost All

Abstract In Yemen, farmers and people living along the roads are suffering from the lack of utilization of rainwater runoff from road surface & surrounding area and road water structures. The objectives of this research is to optimize the benefits of Road Rainwater Harvesting (RRWH) to the beneficiaries during road design, construction and operation & maintenance; to suggest a technical outlines; to induce the awareness of road’s engineers on the importance of Integrated Water Harvesting Management (IWHM), in addition to discussing the Environmental and Social Impact Assessment (ESIA). The research approach focused on conducting field visits and applying a reconnaissance survey to document the current and potential road rainwater structures along the pilot section of 24 km as part of Sana’a – Al-Hodiedah road between Al- Masajed village and Sooq Al-Aman; Designing and applying questionnaires and interviews for farmers & beneficiaries, and road engineers. The SPSS software program was used to analyze the collected data. From the conducted interviews along the road, it was revealed that almost all the stakeholders have land adjacent to the roadside, and their farms are irrigated from rainwater collected from road structures. All inhabitants considered water floods running from/on the road surface and structures as their rights, and it is distributed at the moment according to the field’s water rights which exist before the road construction. The research found that almost all farmers considered the water from roads as contaminated water. The source of contamination comes from residual oil on the road, diesel, oil from oil shops and suspended soil particles. On the other hand, according to the road engineer’s questionnaire, the concept of water harvesting, groundwater recharge and water for irrigation from road surface and road structures were not considered during design. In addition, the results obtained showed that water-harvesting techniques in the pilot road section is in the form of farmers’initiatives implemented by directing water to their farms for irrigation. The study conclude applying RRWH to protect the road sections from erosion and damage; increase the availability and utilization of water in the areas nearby roads; minimize the erosion of landscape especially in mountainous areas as well as in road embankments; improve the stabilization of the road slopes; and maintain esthetic value of landscape nearby roads. It is recommended that road drainage structure should be located in a proper place to avoid conflicts among farmers and fulfill their water rights. To avoid soil and water contamination by oil, grease and fuel from vehicles along the road, the research recommends that oil workshops should be implemented and forced to collect and recycle oil instead of disposing it on the road surface. RRWH is recommended to be applied to mitigate the damage of terraces during the heavy runoff. The study urges the joint efforts from all stakeholders and road engineers to apply the suggested technical outline in this paper by including rainwater harvesting from roads as part of road design, implementation and maintenance. Keywords: rainwater harvesting, road design, culverts, engineers,stakeholders, farmers, ESIA, Yemen, social and economic benefits.

Analisis Gradasi Penggunaan Material Agregat Base Class A Spesifikasi BinaMarga 2010 Rev 3 Proyek Pelebaran Jalan Sp. Ujung Aji – Batas Kota Kabanjahe

2019 ◽  
Vol 3 (1) ◽  
Author(s):  
Brian Baya Sembiring. ST ◽  
Parada Afkiki Eko Saputra, ST,MT
Keyword(s):  
Road Construction ◽  
Analysis Data ◽  
Road Surface ◽  
The Road ◽  
Class A ◽  
On The Road ◽  
Observation Method ◽  
The Right ◽  
The Given ◽  
Filter Analysis

Road is a land transportation infrastructure that covers all parts of the road, including complementary buildings and equipment intended for traffic. Road Structure Improvement is one project that aims to improve the quality of roads. As the object of work to be studied is the widening of the sp. Ujung Aji - Limits of the City of Kabanjahe. Road construction with a flexible layered pavement with cover or without overlays is usually often damaged such as: cracks, hollows, bumps on the road surface. In other conditions it is often seen that the grooves of the former water flow to the subgrade are visible. The situation is more extreme and often occurs, namely the road surface peels to reach the foundation layer, so that the aggregate looks scattered. This study uses the direct observation method in the widening project of Jalan Simpang Ujung Aji - Bts. Kabanjahe City. This research was carried out at the time of laying and compaction of the bottom road foundation layer such as Base B and Base A. Activities carried out included data collection, data processing, analysis and observations in the Laboratory. The results of the filter analysis of rough gradations are good, which is in the middle between the given gradation boundaries, does not coincide and does not come out of the given gradation limit. Based on aggregate filter analysis data, it can be concluded that the results of the gradation of aggregate class A percent are retained and passed the filter in accordance with the general specifications of Bina Marga 2010 revision 3 and according to class A aggregate planning. the specimen is completely waterless, so the weighing results in the right balance.

GPS navigation apps and the price of anarchy

2020 ◽  
Vol 104 (560) ◽  
pp. 235-240
Author(s):  
Leonard M. Wapner
Keyword(s):  
Real Time ◽  
Traffic Accidents ◽  
Price Of Anarchy ◽  
Heavy Traffic ◽  
Road Construction ◽  
Gps Navigation ◽  
Traffic Conditions ◽  
Real Time Traffic ◽  
Road Maps ◽  
Drive Time

Folded paper road maps are found next to sextants in the pile of obsolete navigation tools. GPS navigation apps like Waze and Google Maps, accurate to within a few metres, are available on all smartphones and most new cars. These apps provide drivers with real time traffic conditions and suggest minimum drive time routes, giving drivers the ability to avoid congestion and delays caused by heavy traffic, accidents, road construction and other hindrances.

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