road widening
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2021 ◽  
Author(s):  
Haoran Yong ◽  
Ping Hu ◽  
Jie Xiao ◽  
Xiwen Zhang

2021 ◽  
Vol 2021 ◽  
pp. 1-15
Author(s):  
Xiaobo Xing ◽  
Zhenhao Bao ◽  
Wei Li

Increased traffic volume has made it necessary to increase highway capacities by widening embankments and pavements. Differential settlement of foundation consolidation and rational utilization of existing embankments are the main problems encountered in road reconstruction. In this paper, the finite difference method is used to simulate the construction process of using the existing embankments directly in the reconstruction project of expressway, and the fluid-solid coupling model of foundation settlement is established to calculate the differential settlement between foundation and subgrade. The influence of road widening mode and embankment height on differential settlement is analyzed. The mechanical response of subgrade under differential settlement is simulated and the law of uneven settlement of main reconstruction forms is investigated. The dynamic response of existing embankments soil under the action of rammer is systematically evaluated. The results show that, with the increase of consolidation time, the differential settlement is gradually obvious at the junction of the new and existing embankments, and there is a possibility of landslide along the junction of new embankments, which should be dealt with in engineering. The smaller the height difference between the existing foundation and the new foundation is, the more the position of the maximum settlement point of the foundation moves towards the new foundation. The greater the height of the new subgrade is, the greater the uneven settlement is. The criterion based on the single rammed energy and compaction stopping standard is proposed to determine the reinforcement depth of existing embankment.


CERUCUK ◽  
2021 ◽  
Vol 5 (2) ◽  
pp. 151
Author(s):  
Ahmad Anshori ◽  
Candra Yuliana

The effect of planning on construction projects will have an impact on income within the project itself. Usually, the realization of work plans in the field often experiences delays in the process, because the number of revenue was determined by the method of payment stipulated in the construction contract. Payment system aspects affect the working capital that needs to be provided by the contractor. Therefore, the role of planning the flow of cash flow is very substantial in the implementation of the project. The purpose of this study is to get a cash flow plan with a Monthly Payment system and Progress Payment system based on the project schedule of the Road Works-Road Widening On Kurnia Street North Landasan Ulin Banjarbaru. The method used to analyze the data is project scheduling by making the description and sequence each activity, determining the duration for each project work, and making a project network diagram using the PDM Method ( Precedence Diagram Method ). Then make a cash flow analysis with monthly payment system and progress payment with three payments, at cumulative progress 30.04%, 70.28%, and 100% on the conditions of EST ( Earliest Start Time ) and LST ( Latest Start Time ) schedule. The results of the data analysis show that the payment system that provides maximum benefits is the Monthly Payment system using a 20% down payment on the EST ( Earliest Start Time ) and LST ( Latest Start Time ) schedule conditions with a total loan of Rp. 653,000,000, the contractor gets a profit of Rp. 490,990,222 with a percentage of profits of 8,892%. 


2021 ◽  
Vol 4 (2) ◽  
pp. 1
Author(s):  
Sentot Tri Wibowo ◽  
Suwarno Suwarno ◽  
Ahmad Ridwan ◽  
Haris Wicaksono ◽  
Fitry Rahmawaty

In a construction project, there are several aspects that cause the project not to go according to plan. Cost and time are aspects that need to be considered to avoid losses incurred in a project. Jombang-ploso-legundi-gresik road project is one of the road widening projects carried out by PT. Mix Pro Indonesia. The project was carried out with the aim that access to (Surabaya-Mojokerto) or further trans Java toll road is quicker safe and smoother. This research aims to optimize the cost and time on the project using the Earned Value method. Calculations include the calculation of ACWP (Actual Cost of Work Performance), BCWS (Budgeted Cost Work Schedule), and BCWP (Budgeted Cost for Work Performed) using the Earned Value method. From these parameters, estimate aspects of cost and time. As well as project analysis of acceleration on a critical trajectory of work. The results of calculations in the 12th week obtained a BCWS value of Rp 1,216,677,846,400 BCWP = Rp 3,040,372,140,080, ACWP = Rp 3,678,560,000. CV value = -Rp 109,203,495.92, SV = Rp 895,646,816.82, CPI = 0.827, and for SPI = 2,499. From these results it can be seen that the CPI value < 1 which means that there are project expenditures that exceed the original plan. With the results, it can be used as a reference in the implementation of project activities.


ASTONJADRO ◽  
2021 ◽  
Vol 10 (2) ◽  
pp. 225
Author(s):  
Syaiful Syaiful ◽  
Hermanto Siregar ◽  
Ernan Rustiadi ◽  
Eri Susanto Hariyadi

<p>The development of transportation is increasing rapidly from year to year in accordance with existing technological developments, currently transportation plays an important role in human life, roads are the means of transportation that play the most role in this, along with the increasing volume of passing vehicles as well as road widening of course. Produces a new problem that may still be underestimated, that problem is noise. One of them is a place of education or a school that is right next to the main road, namely Wiyata Mandala Junior High School, Bogor Regency. The speed of private vehicles has a significant effect on noise. From all analysis calculations, the biggest equation is found in the first day of the third point of research (Sound Level Meter 3), with a contribution of 28.95%. The calculation below shows, y = 61.62 + 0.004x1 at a distance of 15.25m SLM. This equation means that if there is no decrease in motorbike speed, the noise level on the SLM3 is 61.62 dB<sub>A</sub>. The second largest equation was obtained in the first day of research at the second point (Sound Level Meter 2) with a contribution of 27.14% based on the calculation of the equation below, y = 64.23 + 0.007x1 with a distance of 3.44m SLM. The purpose of the above equation is that if there is an increase in motorbike speed, private vehicle speed and public vehicle speed, then the noise on the SLM2 is 64.23 dB<sub>A</sub>. During the Covid-19 pandemic, motorcycles at moderate speed often passed this school area. So based on the results of observations and calculations, it was found that the decrease in motorcycles was 45% which crossed the Wiyata Mandala Junior High School Bogor.</p>


Author(s):  
Susanto Susanto ◽  
Dimas Dwi Budiarjo ◽  
Aria Hendrawan ◽  
Prind Triajeng Pungkasanti

<span lang="EN-US">Indonesia is a country with a high population, especially in big cities. The road always crowded with various types of vehicles. Sometimes the growth of vehicles is not matched by road construction. During peak hours, too many vehicles can cause traffic jams on the road. The road is needed to be widened to accommodate the number of vehicles that pass each day. In order for road widening to be precise at locations that frequently occur in traffic jams, data on the number and classification of vehicles passing is required. Therefore, a system that can calculate and recognize the type of vehicle that passes is needed. The development of various studies on artificial intelligence especially about object detection can classify and calculate the type of vehicle. In this study, the authors used the you only look once (YOLO) object detection system using a convolution neural network (CNN) method to classify and count vehicles that pass automatically. The author uses a dataset of 600 images with 4 classes which are car, truck, bus, and motorbikes that pass through the road. The results showed that the YOLO object detection system can recognize objects consistently with accuracy more than 80% on CCTV video that installed on the road.</span>


2021 ◽  
Author(s):  
Ivica Stančerić ◽  
Iris Tomić ◽  
Šime Bezina ◽  
Tamara Džambas

Road widening is necessary in curves because the rear wheels of the vehicle are usually not steerable and their trajectory is described with a smaller radius than that of the front wheels. The maximum value of the road widening depends on the turning angle, the radius of the curve and the length of the vehicle, the wheelbase and the front overhang. The required road widening increases gradually with a higher turning angle and decreases gradually as the vehicle leaves the curve and continues in the direction. This paper presents the determination of road widening in curves according to the Croatian regulations, German guidelines and computer simulation of the vehicle movement. The road widening determined according to the above mentioned guidelines and regulations for certain design vehicles (truck with trailer, semi-trailer truck and bus), different radii of circular curves (from 12.5 to 500 m) and different turning angles (from 45 to 270°) is compared with the road widening determined by computer simulation of vehicle movement with the Autodesk software Vehicle Tracking.


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