OJS Universitas Tadulako
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Analisis Keterkaitan Antara Aktivitas Kendaraan Bermotor dengan Tingkat Kebisingan: Studi Kasus di Jalan Gatot Subroto, Kota Palu
Full text linkThe elevation of mobility in Palu has evolved into a new noise issue. Noise from motorized vehicles has quite an impact on the tranquility of areas that directly intersect with the highway. Gatot Subroto Axis Road is an instance of a congested road as public facilities such as educational institutions take the crowd of the area. The study aims to analyze the relationship of vehicle activities toward noise level at Gatot Subroto. The research method uses field measurement by a sound level meter (SLM), tripod, and counter. Noise sampling standards refer to SNI 8427:2017 regarding measuring environmental noise levels. Data was collected for one day on weekdays and weekends with three take times at three sampling points. Noise level analysis is carried out using frequency distribution. The next data analysis is to look for the equivalent noise level or LAeq. The noise level points varied between 71,6 dBA-84,02 dBA. The traffic volume reached a peak at 853. The p-value was 0,72 which was above 0,05. The regression test was Y=0,0048x+72,904, and R2 showed 0,15 points, which means that 15% of the noise level was affected by traffic volume. In conclusion, the average noise level at Gatot Subroto Axis Road exceeded the quality standards set according to the Decree of the Minister of State for the Environment No. 48 of 1996, which is 55 dB(A). Despite no significant difference in noise levels on weekdays and weekends based on the t-test, the noise level is affected by traffic volume. Noise from motorized vehicles has quite a big impact on the tranquility of areas that directly intersect with the highway. he limitation of this research is the limited amount of data due to the small number of research points and the insufficient number of days, so further research is needed
Pengaruh Kadar Aspal dan Kepadatan pada Nilai Kekesatan (Skid Resistance) Permukaan Perkerasan Beton Aspal Lapis Aus
Full text linkAsphalt concrete wearing course is located on the topmost surface layer so that this layer is indirect contact with vehicle wheels and other environmental factors, such as sunlight, rainwater. This condition makes asphalt concrete wearing course pavement susceptible to wear on the surface layer. This condition causes wear on the surface of the asphalt concrete wearing course pavement, so that the surface becomes slippery because the skid resistance decreases, especially in wet conditions. The large asphalt content and density of the mixture can affect the skid resistance of the asphalt concrete wearing course surface. The purpose of this study was to determine the effect of bitumen content and density on the skid resistance value of the asphalt concrete wearing course surface. This research was conducted at the Transportation and Highway Laboratory, Tadulako University. This study used five variations of asphalt content, namely 5.0%, 5.5%, 6.0%, 6.5% and 7.0% by weight of the mixture. Measurement of the skid resistance value of the asphalt concrete wearing course pavement surface using the British Pendulum Tester (BPT). The measurement procedure is based on SNI 4427: 2008. One-way ANOVA Method with a significance level of 95% is used to determine the effect of asphalt content and density on the surface skid resistance value of asphalt concrete wearing course pavement. The results of this study found that asphalt content and pavement density had affected the skid resistance value of the asphalt concrete wearing course pavement surface. The results of this study have also found that the relationship model between asphalt content and the skid resistance value of the asphalt concrete wearing course pavement surface is y= -2.8543x +87.965, R2= 0.8279. The relationship model between density and the surface skid resistance value of the asphalt concrete wearing course pavement, y = -85.006x + 2621.46, R2 = 0.935. This means that the higher the asphalt content and the density of the asphalt concrete wearing course pavement, the lower the surface skid resistance
Pemetaan Ilmiah Topik Penelitian Perluasan Layanan Bus Rapid Transit (BRT) Trans Jateng
Full text linkBus Rapid Transit (BRT) is one of the types of bus-based public transportation that provides fast, convenient, and affordable urban transportation. The BRT service in Central Java is called Trans Jateng and is managed by the Transportation Agency of Central Java Province. The operational concept of Trans Jateng is to serve routes that connect urban agglomeration areas in the province of Central Java. Trans Jateng plans to develop future services grouped into service corridors based on the existing development areas in Central Java, including the Kedungsepur, Wanarakuti, Banglor, Bregasmalang, Petanglong, Subosukowonosraten, Barlingmascakeb, and Purwomanggung agglomerations. In addition to opening new corridors, the development of Trans Jateng BRT services can also be carried out by expanding existing services; therefore, a comprehensive study is essential to monitor and track the progress of the research. This paper will map the literature on service expansion, BRT, and Trans Jateng. The literature database was taken from Google Scholar and analyzed using the VOSviewer tool with a mapping of previous research. The results of this research are highly useful for understanding the current development of research on the expansion of Trans Jateng BRT services in the future
Kuat Lentur Balok Laminasi Kombinasi Kayu Jawa (Lannea Coromandelica) dan Gelugu (Cocos nucifera)
Full text linkThe use of kayu Jawa (Lannea coromandelica) and gelugu (Cocos nucifera) is very necessary to reduce the forests exploitation as a source of wood raw materials. However, both have debility in terms of mechanical properties and maximum dimensional achievement. Therefore, a mixed glulam system can be applied to produce lightweight structural timber beams with adequate performance. This research is aimed at determining the flexural strength, stiffness, ductility and failure of mixed glulam beams combined with kayu Jawa and Gelugu. A series of bending tests were carried out on timber beams using the three point bending method on three categories of beams, namely B-J, B-G and B-L. B-J beams, consist of solid timber of kayu jawa which has density ± 0,60 gr/cm3, B-K consist of solid gelugu which has density ± 0.88 gr/cm3, while B-L consists of kayu jawa timber in the core zone and one layer of 10 mm thick gelugu with a density of 0,88 gr/cm3 on the tension zone. Each beams category consists of five replications with the dimensions of each beam being 50 mm of wide, 55 mm of high and 760 mm of span. Laminated beams (B-L) are glued with emulsion adhesive with Viscosity 2,500 – 4,500 cPS, resin content 90 – 91%, gel time: 1 hour and curing time 5 – 6 hours with two-sided coating of 250 gr/m2 and clamping force 2 MPa. The results of this research show that the flexural strength (fb) and stiffness (EI) of mixed glue laminated laminated beams are 1,3 times higher than B-J. Apart from that, mixed glue laminated laminated beams (B-L) there was an increase the ductility of 47% when compared to B-G
Studi Keandalan Geolistrik Dalam Identifikasi Kebocoran Embung: Studi Kasus Embung Wolo, Sulawesi Tenggara
Full text linkSmall dams are vital for supporting water resource conservation. The reservoir stores water from several water sources, especially in the rainy season, so that it remains available in the dry season. Some reservoir infrastructures were built using earthen fill materials located around it. This condition is very vulnerable to disasters, ranging from seepage to collapse. It is important to evaluate the safety of all potential dangers to minimize the risk of disasters. One method that can be used is the geoelectric method, which allows us to analyze the resistivity properties of the soil, but the reliability of this method needs to be further evaluated. This research aims to determine the reliability of geoelectric in identifying potential leaks in reservoirs. Geoelectric measurements were carried out at Wolo Small Dam using the Wenner-Schlumberger configuration with 32 electrodes at 2.5 m. Data collection was carried out at the top of the small dam so that it could provide the condition of the soil layer of the embankment material in the longitudinal direction. Validate the measurement using the results of previous research. The results of the analysis show that there are differences in lithology in the body of the reservoir, which indicates differences in the quality of work during construction. The interface between these two surfaces can lead to leaks. Apart from that, the analysis results also show the potential for piping in the reservoir. The location of the potential piping area is not far from the results obtained in previous research at the same location. This shows that geoelectric is quite capable of being a tool that can be used to identify leaks in reservoirs or other water structures. Of course, the combination of geoelectric and other soil testing will provide better results in anticipating disasters caused by small dam leak
Model Bangkitan dan Karakteristik Perjalanan pada Perumahan Kelapa Gading Kalukubula Kecamatan Sigi Biromaru
Full text linkIncreasing population density will affect land use into residential/community housing areas and the emergence of settlements will increase the number of movements generated which can disrupt traffic flow which then reduces the level of road service. This research aims to model the generation of movement in the Kelapa Gading Kalukubula housing area and to determine the amount of traffic generation in the housing at present and in the future because the housing will continue to develop and will analyze the factors that influence the generation of traffic movement. Data collection was carried out by filling out a questionnaire which was distributed and given to residents using a sampling technique (stratified random sampling). To produce a good generation model based on ordinary less squares (OLS), the results of the questionnaire are processed and analyzed using multiple linear regression by SPSS software. Socio-economic characteristics and travel characteristics of the occupants of the house are tabulated as factors influencing the value of trip generation at Kelapa Gading Kalukubula Housing. The best model for generating movement in the Kelapa Gading Kalukubula housing complex is Y = -0.584 + 0.168 X1 + 0.349 X2 + 0.366 X3 + 0.092 X4 + 0.212 X5 with R2 = 0.695, F falue 159.138 where is X1 amount of family member, X2 is amount of worker in family member, X3 is amount of students in family, X4 is amount of car ownership, X5 is amount of motorbike ownership. Based on this model, the total trip generation is 8289 trips/day and averange of trips is 3 trips/day, while the vehicle leaving housing from the Traffic Count is 9462 trips/day and vehicles entering the housing is 10397 trips/da
Evaluasi Dimensi Tiang Pancang Dermaga di Daerah Pesisir Kabupaten Kolaka dengan Mempertimbangkan Pengaruh Likuifaksi
Full text linkThe pier in the coastal area of Kolaka Regency plays a crucial role in the distribution of goods and economic enhancement. However, the risk of liquefaction due to earthquakes threatens the stability and safety of the pier structure. This study aims to evaluate the dimensions of the pier piles considering the effects of liquefaction. The research methodology includes the analysis of liquefaction potential using the NCEER method, axial load capacity analysis using the Briaud method, and deflection analysis using the Broms method. Foundation analysis under liquefaction conditions is simplified by assuming the SPT values in the liquefied soil layer to be zero. Standard Penetration Test (SPT) data were used to assess soil conditions at the pier location. The analysis results indicate that the sand layer at a depth of 6-12 meters has a high potential for liquefaction, primarily due to the high content of coarse grains and a fine particle percentage of 15%. The increase in peak ground acceleration (PGA) in the Sulawesi region also amplifies the potential for liquefaction. The foundation analysis without considering liquefaction shows that the pile dimensions with a depth of 25 meters meet the design criteria, although deflection approaches the permissible limit. However, under liquefaction conditions, there is a slight reduction in axial load capacity (3%), but the pile deflection increases beyond the allowable limit. To mitigate the risk of liquefaction and ensure the safety of the pier, it is recommended to extend the pile depth to 28 meters
Analisis Stabilitas Lereng Tambang Nikel Kabupaten Morowali
Full text linkCentral Sulawesi Province is a province that has quite high mining activities, so an evaluation of the stability of open pit slope excavations needs to be carried out to prevent collapses during the exploration process which could result in loss of life. Analysis using the finite element method is one method that can be used to analyze slope deformation and stability during the excavation process. This research simulates excavation of a mine slope in 4 stages with a height of 5 m and a slope of 500. The analysis was carried out based on the results of the N-SPT test at three locations (GT-15617, GT-19125 and GT-19841) which are the slopes with the most extreme slopes. The analysis results show that at GT-15617 the maximum deformation occurred at stage 4 of the excavation at 0.18 m with a safety factor of 1.43, the maximum deformation at the GT-19125 location occurred at stage 4 at 0.21 m with a safety factor of 1.26 and at location GT-19841 maximum deformation occurred at stage 4 of 0.21 with a safety factor of 1.21. The overall safety factor analysis results do not meet the required minimum safety factor criteria
Analisis Profil Kecelakaan Konstruksi pada Proyek Bangunan Gedung di Indonesia
Full text linkThe construction sector is the highest contributor to construction accidents, which is 31.9% of the total construction accidents. One of the leading causes of accidents is the need for more awareness from workers and companies of the importance of implementing OHS at work. This situation arises due to the need for maximum planning and implementation of the Construction Safety Management System through the Minister of Public Works and Public Housing, and the Indonesian government has issued Regulation Number 10 of 2021 concerning construction safety guidelines. Data collection in this study is secondary data, namely construction accident reports by the Construction Safety Committee. The analysis used is archival analysis, where the report is mapped to produce statistics on construction accidents based on the type of project, time of occurrence, day of occurrence, the impact of the accident, and the cause of the accident. The results showed that the building became the first rank of construction project types with a percentage of 35% where the occurrence was in the morning before noon, namely 08.00-12.00, and on Tuesday became a day that often occurred construction accidents based on the construction safety committee. It was found that the cause of the accident was dominated by human factors and work equipment, which would impact the damage to the building itself with a percentage of 56%. The results of this study will be helpful for implementers/construction accident experts as guidelines for the futur
Perilaku Geoteknis Tanah Lanau yang Distabilisasi dengan Serutan Karet Ban
Full text linkRecently, developments in the geotechnical-environmental engineering field have become more attractive. One of the interesting efforts to be researched is how the geotechnical behavior of silty soil reinforced with fiber from shredded tires. This study aims to evaluate silty soil's mechanical properties, which are stabilized with shredded tires. This research involved shredded tire from used tire shreds with proportions of 2%, 3%, 4%, and 5% by dry weight of soil sample. The tests of soil physical properties and mechanical properties were conducted to evaluate the characteristics of the mixture soil. The unconfined compressive strength (UCS), shear strength, California Bearing Ratio (CBR) and cracking behavior were verified to evaluate the behavior of the silty soil–shredded tires mixture. The results showed that adding 2% shredded tires performed satisfied on some of the mechanical properties tested. These results illustrate the potential of utilizing shredded tires waste as an alternative material that can reduce tire rubber waste