scholarly journals GPR investigation on damaged road pavements built in cut and fill sections with retaining wall

2021 ◽  
Author(s):  
Sandro Colagrande ◽  
Danilo Ranalli ◽  
Marco Scozzafava ◽  
Marco Tallini
Keyword(s):  
Retaining Wall ◽  
Central Italy ◽  
Traffic Load ◽  
Radar Signal ◽  
Medium Size ◽  
Signal Attenuation ◽  
Urban Road ◽  
The Road ◽  
Road Section ◽  
Cut And Fill

We present the GPR results dealing with flexible road pavements located on cut and fill sections with retaining wall. The aim is to evaluate the road damage (particularly the ramified cracks) taking into consideration also other parameters (cut and fill section height and traffic load). The GPR evaluation was carried out on 20 sites selected in the secondary urban road network of L’Aquila, a medium-size urban area representative of the Abruzzi Region (Central Italy). Stress induced by traffic load generally affects a road section thickness of about 1.0 m from the ground; so a monostatic GPR antenna, with a nominal frequency of 2000 MHz, was used given that its maximum inspection depth corresponds to 1.0 m from the ground. The 2000 MHz antenna has also a quite high-resolution when inspecting road damage. The GPR acquisition was carried out in damaged and adjoining undamaged road sites, to compare the GPR data of the two areas. GPR data analysis was based on the sweep-rectified power approach to evaluate the radar signal attenuation curve vs. depth, which permitted us to single out different road types of damage and to discuss the factors which caused them.

scholarly journals ANALISIS STABILITAS LERENG MENGGUNAKAN SOFTWARE PLAXIS 8.6 DENGAN DINDING PENAHAN TANAH (RETAINING WALL) (STUDI KASUS RUAS JALAN NASIONAL BANDA ACEH-MEDAN STA 83+135 GUNUNG SEULAWAH)

2018 ◽  
Vol 1 (3) ◽  
pp. 76-82
Author(s):  
Wihardi Wihardi ◽  
Munirwansyah Munirwansyah ◽  
Sofyan M. Saleh
Keyword(s):  
Slope Stability ◽  
Safety Factor ◽  
Retaining Wall ◽  
Road Construction ◽  
Local Area ◽  
Traffic Load ◽  
Road Infrastructure ◽  
The Road ◽  
The Stability ◽  
Banda Aceh

Road infrastructure is very important and is a key enabler for the economy. If the road infrastructure was damaged or had various problems such as sliding, the movement of goods and passengers will be hampered and delayed to the acceleration of development in the local area. The landslide and movement of groundwater is a problem that often occurs repeatedly on some streets. Therefore, it is necessary to study the strengthening of the slopes at the bottom of the road construction with retaining wall. This study aims to analyze slope stability by getting numbers Safety Factor (FK). The analysis is used to analyze the stability of slopesusing the finite element method with the help of software Plaids, The scope of this review includes the calculation of slope stability at the national road from Banda Aceh - Medan Sta. 83 + 185 Mount Selawah. The results of slope stability analysis on the existing condition by using Plaxis software at the point of a review is not safe (FK 1.25). Thus, it is done handling the retaining wall, installation of anchors. Based on the analysis of slope stability after being given the strengthening of the slopes with a retaining wall and the installation of anchors using Plaxis software under the influence of traffic load in an unsafe condition (FK 1.25). Then additional handling is done by changing the angle of the slope so that the value of the safety factor (FK) 1.25.

Study on Satisfaction Evaluation of Urban Road Traffic Conditions

2013 ◽  
Vol 361-363 ◽  
pp. 2344-2348
Author(s):  
Jing Fei Yu ◽  
Li Dong Wang ◽  
Nan Nan Wang ◽  
Xin Jie Zhang
Keyword(s):  
Road Traffic ◽  
Common Factors ◽  
Weighting Factor ◽  
Actual Situation ◽  
Urban Road ◽  
The Road ◽  
Traffic Conditions ◽  
Road Section ◽  
Four Levels ◽  
Satisfaction Evaluation

From the basic feelings of urban road use, the paper selects 15 indicators to factor analysis for satisfaction of urban road use; those indicators are attributed to the four common factors, final the scores of integrated weighting factor is taken variable to cluster analysis. The results showed that the satisfaction of 13 road sections that was selected can be divides into four levels. By comparison, the results of analysis are more in line with the actual situation of the road section, therefore the results can provide a basis to enhance and improve road conditions for the relevant personnel.

scholarly journals Mining Topological Dependencies of Recurrent Congestion in Road Networks

2021 ◽  
Vol 10 (4) ◽  
pp. 248
Author(s):  
Nicolas Tempelmeier ◽  
Udo Feuerhake ◽  
Oskar Wage ◽  
Elena Demidova
Keyword(s):  
Network Topology ◽  
Real World ◽  
Public Transportation ◽  
Road Network ◽  
Road Networks ◽  
Traffic Load ◽  
Data Mining Algorithm ◽  
Urban Road ◽  
The Road ◽  
Spatio Temporal

The discovery of spatio-temporal dependencies within urban road networks that cause Recurrent Congestion (RC) patterns is crucial for numerous real-world applications, including urban planning and the scheduling of public transportation services. While most existing studies investigate temporal patterns of RC phenomena, the influence of the road network topology on RC is often overlooked. This article proposes the ST-Discovery algorithm, a novel unsupervised spatio-temporal data mining algorithm that facilitates effective data-driven discovery of RC dependencies induced by the road network topology using real-world traffic data. We factor out regularly reoccurring traffic phenomena, such as rush hours, mainly induced by the daytime, by modelling and systematically exploiting temporal traffic load outliers. We present an algorithm that first constructs connected subgraphs of the road network based on the traffic speed outliers. Second, the algorithm identifies pairs of subgraphs that indicate spatio-temporal correlations in their traffic load behaviour to identify topological dependencies within the road network. Finally, we rank the identified subgraph pairs based on the dependency score determined by our algorithm. Our experimental results demonstrate that ST-Discovery can effectively reveal topological dependencies in urban road networks.

scholarly journals Influence of Selected Vehicle Maneuvers on Reduction of the Urban Roads Capacity

2019 ◽  
Vol 21 (4) ◽  
pp. 81-89
Author(s):  
Jan Celko ◽  
Matus Kovac ◽  
Kristina Huszarova
Keyword(s):  
Left Turn ◽  
Urban Road ◽  
The Road ◽  
Critical Gap ◽  
Turn On ◽  
Road Section ◽  
Road Intersections ◽  
On The Road ◽  
The Right ◽  
Curve Radius

Capacity assessment of urban roads according to Slovak standard does not sufficiently take into account the influence of vehicle maneuvers on road section performance between the two intersections. This research analyzed turning relations on selected urban road intersections and the influence of right turn and left turn on major stream speed changes. For the purpose of determining the influence of the right turn on decrease in capacity, measurements were carried out at 7 uncontrolled intersections with curve radius ranging from 6 to 30m. To determine the influence of the left turn on the capacity of urban road a critical gap was evaluated, using the Raff’s, method, based on the analysis of accepted and rejected gaps in the major traffic stream, which was one of the main inputs for simulations. The findings were used to determine the influence of selected maneuvers on the road capacity, which led to a proposal for reduction coefficients based on computational analysis performed using simulations in PTV VISSIM.

scholarly journals Analisis Lalu Lintas pada Ruas Jalan Lingkar Sicincin-Lubuk Alung Kab.Padang Pariaman untuk Disain Perkerasan

2019 ◽  
Vol 14 (2) ◽  
pp. 1
Author(s):  
Dwina Archenita
Keyword(s):  
Pavement Design ◽  
Traffic Load ◽  
Survey Period ◽  
Ring Road ◽  
The Road ◽  
Road Pavement ◽  
Road Section ◽  
On The Road ◽  
Subgrade Strength

Traffic is an important part of road pavement design in addition to subgrade strength. This is because traffic is a burden for the road and is very decisive in the thick planning of each layer of pavement. Thus the calculation of the traffic load should have been carried out before carrying out the design of the pavement. The Sicincin - Lubuk Alung ring road section located in Kab.Padang Pariaman is one of the road sections designed with pavement design. Therefore, a traffic survey was carried out on the road section. Traffic surveys are carried out for three days, two days on weekdays and one day on holidays. Every day the survey time is divided into three times, morning, afternoon and evening at rush hour. The survey in the morning takes place at 07:15 - 08:15 and 08:15 - 09:15 while in the afternoon it takes place at 13:00 - 14:00 and 14:00 - 15:00. Furthermore, for the afternoon survey, it will be held at 16:00 - 17:00 and 17:00 - 18:00. After processing the data, in each survey period the LHR value is obtained for both directions. The LHR value used for pavement design is the largest LHR value of all LHR values obtained.

Bottleneck prediction of urban road network based on improved PSO algorithms and fuzzy control

2020 ◽  
Vol 39 (4) ◽  
pp. 5833-5843
Author(s):  
Xue Xing
Keyword(s):  
Fuzzy Control ◽  
Road Network ◽  
Target Area ◽  
Coordination Control ◽  
Urban Road Network ◽  
Main Road ◽  
Urban Road ◽  
The Road ◽  
Road Section ◽  
Improved Pso

Traffic bottleneck refers to the road section or node that often causes the propagation or spread of traffic congestion in the road network, which is the source of the whole road network congestion. In this paper, the author analyzes the bottleneck prediction of urban road network based on improved PSO algorithms and fuzzy control. This paper analyzes the factors and characteristics of the main road of the system, proposes the traffic coordination control of the main road based on the delay model, and carries on the statistical simulation to the actual traffic data, develops the basic theory of the traffic coordination control which is more effective than the traditional timing control strategy. Compared with the traditional model, the algorithm considers the waiting time of the red light at the intersection. For the congested road section, it can better calculate the travel time of the vehicle, making the results more accurate and more applicable. The results of this study can provide a strong theoretical basis and prediction scheme for the traffic management and control of the road network in the target area.

scholarly journals Analysis of the Impact of no Passing Zones on Fuel Costs

2021 ◽  
Vol 6 (1) ◽  
Author(s):  
Nenad Ruškić ◽  
Tea Pavlica ◽  
Jelena Nišić
Keyword(s):  
Road Network ◽  
Traffic Load ◽  
Level Of Service ◽  
The Road ◽  
Road Section ◽  
Traffic Volumes ◽  
Clear Visibility ◽  
The Impact ◽  
Fuel Costs

The primary task of traffic and transportation planning is to improve the conditions of traffic and level of service on the entire road network. On three sections, which were analyzed in this paper, the possibility of reducing the precentage of no passing zones was noticed, by changing the horizontal signalization on the segments of road section where the clear visibility for overtaking was determined for one direction of the two-way highway. In the first part of the paper, the analysis of traffic conditions on the existing and on the newly designed variants of all three observed road sections was performed. Analysis of the level of service on the intersections that are part of this research are done in chapter 2. Increasing the speed on the newly designed section results in a reduced travel time and this leads to savings in fuel costs as shown in chapter 3. Traffic forecast for the planning 2029 is done in chapter 4, the forecasted traffic load implies future traffic volumes for which adequate capacities of the road network need to be provided. Chapter 5 is based on determination of the relationship between the benefits brought by the newly designed variant and the costs that are realized during its construction. The results of this analysis were used as input data for the economic evaluation of the project solutions, where the savings in fuel costs were analyzed.

scholarly journals EVALUATION OF THE DESIGN OF RETAINING WALLS ON THE ROAD SUKABUMI (BAROS) - SAGARANTEN KM BDG 115+200

ASTONJADRO ◽  
2022 ◽  
Vol 11 (1) ◽  
pp. 233
Author(s):  
Muhammad Kemal Pasha ◽  
Cece Suhendi ◽  
Utamy Sukmayu Saputri
Keyword(s):  
Retaining Wall ◽  
Retaining Walls ◽  
Water Infiltration ◽  
Body Area ◽  
The Road ◽  
The Third ◽  
Road Section ◽  
A Value ◽  
On The Road ◽  
Calculation Analysis

<p>The Sukabumi (Baros) – Sagaranten Km Bdg 115+200 road section which is located in Sukabumi Regency is a road section for the province of West Java. Because the road is always damaged due to being eroded by water infiltration in the rice fields that seeps into the road body area at that location and the soil at that location tends to be unstable based on the results of lab tests having a shear angle value of 4.99ᵒ and having a specific gravity of 17.45, then it is carried out analysis of the existing damaged retaining wall and the design of a new gabion-type retaining wall at that location. The gabion retaining wall building will be designed with 3 designs, the first using a stone volume of 13 m3, the second using a stone volume of 8 m3 and the third using a stone volume of 6.5 m3. Based on the results of the calculation analysis using Rankine theory, it was found that the existing retaining wall was unable to withstand the shearing force which got a check value of 1.18 which should have a value of SF &gt; 1.5, while the 3 gabion plan buildings got the appropriate SF value, namely against the overturning force, shear force and soil bearing capacity.</p>

scholarly journals DESAIN ULANG BADAN JALAN DENGAN GEOTEKSTIL SEBAGAI ALTERNATIF PENINGKATAN STABILITAS LERENG

2021 ◽  
Vol 15 (1) ◽  
pp. 32
Author(s):  
Rosiane Agustin ◽  
Handi Sudardja
Keyword(s):  
Tensile Strength ◽  
Slope Stability ◽  
Safety Factor ◽  
Type Iii ◽  
The Road ◽  
Toll Road ◽  
Road Section ◽  
Service Period ◽  
Cut And Fill

Abstract The condition of Ciawi – Sukabumi Toll Road section 2 has various topographies with difference of elevation. To get a safe and comfortable road alignment, cut and fill works are carried out. During the landfill work at STA.18 + 700 – STA.18 + 900 landslides occurred on the slopes. To ensure that the slope conditions are safe during the service period, redesign of the road bodies is carried out to produce slopes with a safety factor value (SF) ≥ 1.25 (Bowles, 1993) and SF ≥ 1.10 if the earthquake is calculated (SNI 8460: 2017). The slope stability phase is calculated on the original slope conditions by taking into account the potential for earthquakes at the research location. This analysis was carried out with manual calculations and the GeoStudio 2018 R2 sub program SLOPE/W, both calculations using the Simplified Bishop Method. The results of the sliding analysis obtained the original slope SF without considering the earthquake of 1.48 for manual calculations and 1.41 for SLOPE/W. Then the SF of the slopes with the effect of the earthquake is 0.79 with manual calculations and 0.82 with SLOPE/W, it is found that all conditions are basic sliding. The analysis showed that the earthquake had a significant impact on slope stability, with a decrease in slope SF of 44.23% and the slope was categorized as unstable. Then, it is recommended to add woven geotextile with a tensile strength of 200 kN and a river stone gabion counterweight. From the modeling in each condition that has been simulated, it is found that the countermeasures are Type III with slope SF 1.15 as a redesign. . Keywords: Bishop, Geotextile, Safety factor, SLOPE/W, Slope stability

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