Direktori jurnal elektronik Politeknik Negeri Padang (PNP)
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Analisis Faktor-Faktor Yang Mempengaruhi Keterlambatan Proyek Apartemen Opus Bay Balmoral Batam
Full text linkCurrently construction projects in Batam City in the field of foundations are increasing rapidly. This is a factor of success and economic growth in Batam City. The city of Batam has shown several towering construction buildings. Tall buildings are very easy to find in Batam City today. The increasing construction of high-rise buildings in Batam City must also be in line with the increase in the success of the project so that construction projects must be completed according to the specified schedule, the right budget, such as making a budget plan, and the expected final results. This study aims to identify the factors that cause delays in the Opus Bay Balmoral project in Batam City. Collecting data in this study used a survey method with a questionnaire instrument and direct interviews with respondents. Data were analyzed using the Relative Score Index method to obtain information on the dominant factors causing delays in the Opus Bay Balmoral development project in Batam City. The research results obtained, there are three factors which indicate that the factors causing the delay in the Opus Bay Balmoral project are: weather factors, design factors, and location factors. These three factors have relative index scores of 0.791, 0.508, and 0.505. Because these three factors have a Relative Index value of > 0.5, with a value for the design factor itself of 0.508, for the weather factor of 0.719 and a location factor of 0.505
Analisa Stablitas Turap Dinding Penahan Tanah di SDN 09 Ranah Pantai Cermin Akibat Beban Statis
Full text linkThe rehabilitation and renovation work for school facilities and infrastructures is one of the work programs of the PUPR ministry. SDN 09 Ranah Pantai Cermin is one of the schools in West Sumatera that has the opportunity to take part in this program. This elementary school is located in the Sangir Batang Hari sub- district South Solok Regency. The plan for building classrooms on the edge of a cliff is the main reason for buiding a retaining wall before classroom construction work begins. Turap were built as retaining walls to prevent landslides around the classrooms during pre-construction, constructions and post-construction. Gravity type with river stones as the base material was chosen as a retaining wall at SDN 09 Ranah Pantai Cermin. Gravity turap was chosen as a retaining wall at this school with consideration that there is quite a lot of material around the site and also that work that does not require special skills. Source of data used for soil stability analysis are obtained from the field, previous research and from shop drawings. After analysing data, it was found that the Turap to be built is safe and meets the planning requirements for retaining wall stability with safety factor as follows: overturning 2.3 times, share 11.84 time and with bearing capacity of 16 time calculated by the Terzhagi method. Analysis and checking of the stability of the Turap as retaining wall at SDN 09 Ranah Pantai Cermin is only carried out for static loads on the retaining wall
Perancangan Mesin Penyangrai Kopi Tipe Rotari Berbasis Mikrokontroler Arduino
Full text linkCoffee is one of Indonesia's leading export commodities in the agricultural sector. Good coffee quality makes Indonesia one of the largest coffee exporting countries in the world. The process of making coffee involves many stages or processes, from harvesting to producing coffee grounds. One of the important stages in coffee production is the process of roasting the coffee beans. This study aims to design a rotary type coffee roaster based on Arduino Microcontroller. The working principle of this machine is to control the temperature and rotation of the roasting cylinder using the Arduino Uno as the controller for the temperature sensor and motor. The method used in this study is the design method, namely the design calculations are carried out on the supporting elements of the coffee roaster machine. From the design, the engine specifications are obtained with a cylinder size of 500 mm long, 130 mm radius, maximum rotation of 80 Rpm, 1HP electric motor and 28 mm shaft size
Perancangan Mesin Potong Torch Asetilen Dengan Gerak 2Axis Menggunakan Sistem Kontrol Arduino
Full text linkThe problem of the oxy-acetylene welding plate cutting tool that is commonly used today is still in a manual way, and is not equipped with driving equipment. This results in the performance of the oxy-acetylene welding plate cutting tool when cutting is not optimal and efforts need to be made to improve the cutting tool in order to facilitate work. The purpose of this research is to produce a construction design of an automatic oxy-acetylene welding plate cutting tool. and can determine the suitability of mechanical components with the arduino control system used. The working method of the tool design process includes work preparation, data collection and making the formulation of problems and objectives to be achieved. Literature study by looking for articles, which are updated to produce solutions to existing problems. Making component and assembly designs and simulations by making calculations and uses on the mechanical construction and control systems used. Using the application of the ZW3D licensed computer aid design program, this research created a design for oxy-acetylene welding plate cutting tools by combining oxy-acetylene welding with stepper motors driven by Arduino control. Producing automatic motion with x and y axes, so that it can facilitate cutting work. The size of the designed tool is 700 mm x 700 mm x 800 mm. From the calculation, the maximum torque required by the plasma cutting table is 0.218 Nm, and the maximum power is 6.845 Watt. The motor chosen is a Nema23 stepper motor because the price is relatively cheap and in accordance with the calculation specifications. Lead Screw is used as a converter of rotary motion from stepper motor into linear motion, with specifications used with diameter = 8 mm, length = 500 mm and pitch = 2 mm
Perancangan dan Analisis Daya Turbin Air Piko Hidro untuk Aliran Arus Rendah
Full text linkOver time, the consumption of electrical energy needed in Indonesia is getting bigger. Various efforts continue to be made either by seeking new energy potential or by developing existing technologies. Apart from the increasing need for electrical energy, efforts are made to supply the needs of electrical energy by utilizing the potential and conditions that exist in certain areas. Water energy has been widely utilized and used for power generation. The potential of water as an energy source can be used as a provider of electrical power. One of the uses of water energy is to make hydroelectric power plants. The purpose of this study is to design a portable water turbine design and find out the results of the calculation of the analysis of electrical power produced. The research method used is the analysis of water turbine design using the SolidWorks application to be able to find out the shape of the turbine that has simple, portable properties and can be carried anywhere. The size that meets the desired criteria is 10 cm for diameter and 4 cm for height. After designing the turbine design, then the calculation and analysis of the power released by the water turbine is carried out. The data needed to perform the calculation are water discharge 1.48×10-5 m3/s, head 6×10-2 m, water density 1000 kg/m3, gravity acceleration 9.81 m/s2, turbine efficiency 12.6%. Using the turbine power formula, the turbine power with a water discharge value of 1.48×10-5 m3/s is 11 Watts. Then the 2nd calculation was carried out with the value of the water discharge used of 9.6×10-5 m3/s and turbine efficiency of 24.9%. After calculation, the turbine power value of 14 Watts was obtained
Rancang Bangun Alat Pengering Tenaga Surya (Solar Dryer) Portabel Berbentuk Prisma Segitiga
Full text linkThis research aims to design a solar dryer to increase drying room temperature. The drying room is designed in the shape of a triangular prism. The dried test material is Arabica coffee. The method used in this research is experimental by comparing the drying results in a solar dryer (inside) and traditional method (outside). Data collection was carried out for 3 days, starting at 09.00 WIB to 15.00 WIB with intervals every 1 hour. The data measured are the temperature inside and outside the solar dryer and the mass of the test material before and after drying. The results showed that the difference in the average temperature measured inside and outside the solar dryer on day 1 was 11.1 oC, on day 2 it was 11.6 oC and on day 3 it was 8.3 oC. The total mass reduction of the test material during 3 days of drying inside the solar dryer was 180.91 gram and outside the solar dryer was 164.03 gram. The average drying rate inside the solar dryer was 10 gram/hour while outside the solar dryer was 9.1 gram/hour. Based on these result, solar dryer can produce higher temperatures, greater mass reduction and higher drying rates than traditional method
Penggunaan Kapur Palupuh dan Kapur Rao-Rao pada Asphalt Concrete - Wearing Course
Full text linkIndonesia has the many area of the lime production including in the West Sumatra Province. The use of lime as a filler in asphalt mixtures is expected to improve the performance of asphalt mixtures. There are two types of lime used, namely Palupuh and Rao-Rao limestone. This study aims to see the effect of using these 2 types of lime as a filler on Asphalt Concrete-Wearing Course (AC-WC) pavements mixture. The bitumen used is Pen 60/70. Marshall testing was carried out to see the characteristics of the pavement mixture. From Marshall's testing on a pavement without lime, has an optimum asphalt content of 6.015%. Furthermore, with a variation of lime 0%, 25%, 50%, 75%, 100% by weight of filler for both types of lime gave an optimum lime content yield of 50% with an increase in stability of 12.024% and flow of 19.375% for Palupuh lime. Meanwhile, the use of Rao-Rao lime cannot improve the Marshall stability of the AC-WC pavement mixtur
Analisis Faktor-faktor Pelayanan Trans Jogja Berdasarkan Persepsi Pengguna Sepeda Motor
Full text linkIn 2021, the population of motorized vehicles in DIY reached 3 million units of which 85% were motorcycles. The growth in the number of motorized vehicles results in increased congestion, pollution, and traffic accidents. To overcome transportation problems in Yogyakarta, in 2008 the government operated BRT (Bus Rapid Transit) based public transportation, Trans Jogja. However, various studies have shown that the load factor of Trans Jogja is very low. This study was conducted to see the characteristics of motorcyclist and latent factors of public transportation services that are prioritized by motorcycle users to switch modes to Trans Jogja.
Primary data was obtained online and offline from 455 motorcycle users by answering a research questionnaire consisting of four sections, namely sociodemographic characteristics, travel characteristics and service factors that are prioritized to switch to Trans Jogja. Data analysis was conducted using descriptive methods, crosstab and factor analysis with SPSS.
The results of the crosstab analysis show that the sociodemographic characteristics of respondents that correlate with the number of motorcycle ownership are age, income, pocket money, number of family members.Based on the factor analysis of public transport services prioritized by motorcycle users to switch to Trans Jogja, 4 latent factors were obtained, namely Trans Jogja service performance, transit experience, bus facilities and fees and parking.
Keywords: Motorcycle, Trans Jogja, mode shift, factor analysis
 
Penerapan Soil Preloading, PVD, dan PHD untuk Analisis Penurunan Konsolidasi Tanah
Full text linkSoft clay has a low bearing capacity, high compressibility and low permeability. This condition causes soft clay soil to have a long settlement time. To overcome this soft soil condition, soil improvement methods are needed. One of the efforts is to use a combination of soil preloading methods, Prefabricated Vertical Drain (PVD), and Prefabricated Horizontal Drain (PHD) methods. Calculating soil settlement with soil improvement is carried out using the Asaoka method, which is a field observation method, and the theoretical method using the Terzaghi method. Based on the calculation results of field observations using the Asaoka method, the average degree of soil settlement is 93.5%. The calculation results of the Asaoka method are recalculated using a back calculation to produce a new parameter value, namely the horizontal consolidation (Ch) value, which is then compared with the Ch value in the previous plan. In the Terzaghi method, the average soil settlement value is 1.205 meters. The results of soil settlement value are used to analyze the height of the embankment based on the load ratio requirement in SNI 8460: 2017, where the load ratio on the ground is ≥ 1.3 times the planned load under service conditions. Based on the monitoring results, a load ratio value of 0.875 was obtained so that the SNI requirements carried out a re-planning of the landfill. Then, proceed with the design of PVD and PHD. The results obtained in planning use triangular PVD patterns with a distance between PVDs of 1 meter
Analisis Kecelakaan Lalu Lintas Ruas Jalan Padang - Solok dengan Metode Accident Rate
Full text linkThe Padang-Solok road section is one of the national road sections that frequently experiences accidents every year. The aim of this research is to determine the factors that cause accidents on the Jalan Lubuk Paraku Sitinjau Lauik section based on the accident rate, and find out alternative prevention solutions future traffic accidents. This type of research is descriptive research using the Accident Rate method. The factors reviewed are the total number of accidents that occur and the length of the road section studied. An Accident Rate value > 1.0 will be classified as a Black Spot, while a value < 1.0 will be classified as a Black Site. The results of the accident analysis based on the Accident Rate can be identified in three road sections that show a high accident rate, namely more than 1.0. The highest accident rate was on the Panorama 2 – Padang-Solok City Limits road section at 2.37 accidents/km.year. The most dominant factor causing traffic accidents is the human factor. After an inspection was carried out, the brakes failed due to the large number of descents or steep inclines which made the car brakes not function properly. An alternative solution for preventing accidents is to create a temporary stopping place at the Padang - Solok city limits to cool down the engine and car brakes, repair traffic signs that are not yet permanent and create a special brake rescue lane for broken brakes at Panorama 2 and near the rice fields PU Mes