Publikasi Jurnal Universitas Islam 45
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    2570 research outputs found

    Akurasi Data Curah Hujan Satelit Terhadap Data Pengukuran di Daerah Tangkapan Air (DTA) Waduk Sutami

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    Sutami Reservoir that located in the Brantas River Basin is a multi-purpose reservoir, it’s used to provide of raw water, irrigation, flood control, and power plants, fish farm, and tourism. Rainfall data information is very important in hydrological analysis as the basis for determining operating patterns, water balances, and calculating sediment rates. Rainfall data that is recorded in a row can show us trends or the nature of rain, but in reality it is very difficult to obtain representative rainfall observation data, both in terms of quality and length of observation data, which is quite in accordance with what is required in several locations, it is very difficult due to the absence of rain stations or broken gauges. Therefore, by taking advantage of technological advances, it is necessary to analyze the accuracy of rainfall data via satellite (GPM V6 and TRMM 3B43 V7) as an alternative to using rainfall data to fill data shortages at certain locations. The results of the analysis of the two satellite rainfall data (GPM V6 and TRMM 3B43 V7) are based on the Nash Sutcliffe Efficiency (NSE) parameters, Root Mean Square Errror (RMSE), Real Error (KR), Correlation Coefficient (R) can be used as an alternative to rainfall data, with satellite rainfall data GPM V6 has better accuracy and performance with average value of NSE 0,8, RMSE 66,46, KR 21,63%, R 0,92

    Evaluasi Kebijakan Penanganan Covid-19 Terhadap Pekerja Konstruksi Gedung di Yogyakarta

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    In 2020, the Corona virus or Covid-19 was declared a global pandemic by the World Health Organization (WHO). This virus significantly affected and disrupted the activities of society, including the construction sector. In response to this situation, the Minister of Public Works and Public Housing (PUPR) issued a policy in Ministerial Instruction No. 02 of 2020 regarding the protocol for the prevention of the spread of the Corona Virus Disease 2019 (Covid-19) in the implementation of construction services. The purpose of this research was to measure the effectiveness level of the policy that had been established and to identify the factors influencing the compliance level of construction workers with the Covid-19 prevention policy. Data was collected from construction projects in the Special Region of Yogyakarta province through offline means using the Likert scale. The data was subsequently analyzed using SPSS and SmartPLS for the Structural Equation Modeling (SEM) method. The results indicated that the Ministerial Instruction No. 02 of 2020 issued by the Minister of PUPR had been effectively implemented throughout 2021 and 2022. It was also revealed that certain factors directly and significantly influenced workers' compliance. These factors included workers' understanding and the availability of facilities and infrastructure, with calculated t-values exceeding 1.960 and p-values less than 0.05

    Analisa Perbandingan Penurunan Awal Bendungan Tipe Material Timbunan Urugan Batu dan Urugan Tanah (Studi Kasus Bendungan Digoel-Papua)

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    To create prosperity for the people of Papua Province. The government has made one of the programs, namely the construction of the Digoel Dam in Boven Digoel Regency – Papua. The successful construction and operation of a dam requires a comprehensive evaluation of the design prior to commencement of the construction process. This study aims to analyze the initial settlement that occurred in the Digoel dam type earth fill and rock fill. Initial settlement analysis was carried out using the modulus parameter obtained from the literature. SIGMA/W software has been used to estimate dam crest settlement due to static loading. From the results of the analysis of the initial settlement of the dam with the rock fill and earth fill types, it is accepted that the maximum permissible settlement is 1.59%

    Perkuatan Dinding Penahan Tanah Kantilever Beton Bertulang di Tumbak Bayuh, Badung - Bali

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    The research, a reinforced concrete cantilever DPT case that experienced a slope was taken. The purpose of this study is to analyze the reinforcement of reinforced concrete cantilever DPT in order to meet the requirements for its stability level. The level of stability analyzed is overturning, sliding and bearing capacity. The method used in this study is a quantitative method with the help of Geo5 software. By adding reinforced floor slabs 200 mm thick, 1500 mm wide and 2000 mm deep from the upper limit, the stability parameters against overturning, shearing and soil bearing capacity have been met. Overturning stability with a safety factor of 2.01 > 1.50 (OK), shear stability with a safety factor = 1.71 > 1.50 (OK) and soil carrying capacity stability with a safety factor of 2.01 > 2.00 (OK), where the overturning, shearing and strength stability curves bearing after reinforcement is above the allowable factor curve. The research results concluded that it was necessary to add reinforced concrete slabs for the stability of the soil retaining walls required at this location

    Penilaian Risiko Keamanan Bendungan Menggunakan Metode Andersen untuk Bendungan Haekrit

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    Dam is a building across a river built with the aim of creating a reservoir. Due to the large volume of water, the dam has a very large potential for danger if failure occurs. Dams need to be managed properly, one of which is through regular inspections. The results of the inspection can be used to analyze dam risks. The Haekrit Dam was originally a reservoir whose classification was upgraded to dam due to the enactment of Minister of Public Works Regulation No. 27 of 2015 concerning Dams. The Haekrit Dam needs to be analyzed for its risks as a dam. The method for analyzing the risk of dams can use the modified Andersen method. This method works well for dams with limited information during construction and instrumentation. This research requires a report on the results of field inspections to determine the physical condition of the dam. The end result of this analysis is the dam risk condition in the form of a safety value (Naman). The safety value obtained is 78,1. Based on the risk assessment of the modified Andersen method, the Haekrit Dam has a safety value above 75 (satisfactory), which means that the dam is in good condition and has a low risk of failure. A satisfactory safety value means that the dam can operate properly at ordinary (normal) and extraordinary load times

    Efektivitas Skenario Lalu Lintas Arus Lebaran Idul Fitri di Gerbang Tol Sidoarjo berdasarkan Pemodelan Mikrosimulasi

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    On the eve of Eid al-Fitr 2023, there was an increase in the number of vehicles heading eastbound of Java Island through the Transjawa Toll Road from the normal traffic flow. The drastic increase in vehicle volume resulted in congestion at the Sidoarjo Tollgate. An effort to unravel the existing traffic congestion was to implement diversion and contraflow scenarios. This study was conducted to prove the most effective scenario to overcome transportation problems during the homecoming flow through microscopic simulations using PTV VISSIM software. In the diversion scenario, 35% of vehicles heading south will be diverted to exit through Sidoarjo 1 Tollgate. This scenario caused an increase in queue length by 34.66% and a delay of 28 seconds at Sidoarjo 1 Tollgate. On the other hand, with the same scenario, there is a decrease in queue length of 16.84% and a decrease in delay time of 58 seconds at Sidoarjo 2 Tollgate. Regarding average speed, there is a decrease of 18.24% on the road section after Sidoarjo 2 Tollgate due to merging. Under the contraflow scenario, there is no significant change in queue length and delay time at both gates, but there is an increase in the average speed of 62.22% at Sidoarjo 2 Tollgate. The simulation showed that the diversion scenario only moves the density of vehicles. In contrast, the contraflow scenario was an effective alternative to break down the density in the 2023 homecoming flow, as evidenced by the increased average speed

    Evaluasi Biaya dan Waktu pada Pembangunan Gedung Kantor Bupati Pasuruan Dengan Metode Earned Value

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    The Pasuruan Regent Office Building Construction Project is a very important project because it involves the implementation of services to the community so that timeliness and quality in the implementation of development is a must. In week 17 the project experienced delays in implementation where in week 17 the progress plan was 36.906% but the facts in the field were still 22.70% so that there was a delay deviation of -14.204%. This study aims to serve as an early warning and evaluate the performance that is indicated to experience delays so that future realization progress can be carried out in accordance with the plan schedule. The method used is Earned Value Analysis which is a project management method used to measure and analyze project performance based on a comparison between the actual value of the work that has been completed (Earned Value, EV), the costs that have been incurred (Actual Cost, AC), and the estimated costs that should be incurred (Planned Value, PV) at a certain point in the project. EVM is a useful tool for monitoring project progress, identifying potential problems, and making predictions about how the project will proceed. Existing data is analyzed to obtain a prediction of the final state of project completion related to the estimated cost and schedule required. Data collection is carried out by collecting documents related to construction projects. From the results of the analysis, it was found that

    Pengendalian Durasi Optimal pada Pembangunan Myze Hotel Sumenep Menggunakan CPM dan Metode PERT

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    The project owner expressed a desire to accelerate the project to avoid delays. According to observations and progress reports, the week 45 progress was 76.071% with a deviation of -7.894%. The delay was caused by the contractor's poor time and cost management which affected the project implementation. Warning letter 1 is given by the owner so that the contractor evaluates and accelerates implementation. Time control is required, as well as time optimization analysis using the PERT method for a more efficient and faster duration. PERT focuses on scheduling with synchronization of project elements, taking into account the uncertainty of the duration of tasks and the overall project. This research aims to identify project duration control by applying PERT and CPM methods, as well as exploring the cost of potential project acceleration through subcontractor integration. Data collection techniques are through project observation and documents such as cost budget plans, S-curves, progress reports, and reference drawings. This data is used to analyze the optimal time through identifying critical activities with CPM and determining the optimal duration using PERT. Alternative project acceleration with the addition of subcontractors. In the research results, the CPM method identifies critical activities such as procurement, piling, connection, and cutting pile heads, from the PERT method the optimal duration is 45 days, with a probability of 59.18%. Alternative acceleration by applying subcontractors occurred cost savings of Rp. 84,855,111.02 or 1.11% of the total normal cost so that the cost of acceleration with subcontractors amounted to Rp. 7,547,781,459.38

    Penambahan Bambu Bulat Pada Balok Beton Pracetak Menggunakan Software Berbasis Elemen Hingga

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    Post-earthquake development in Indonesia is a complex challenge that requires cross-sectoral efforts and support from various parties. Indonesia is prone to earthquakes due to its location on the Pacific Ring of Fire, an active area of earthquakes and volcanic activity. The use of precast concrete has a number of important advantages in earthquake-prone areas but the connection between joints can be a weak point if not done properly. This study will discuss the connection system, connection location, and details. The research method used is numerical analysis using finite element-based software. It is concluded that the connection system used has not been able to reach the capacity of the monolith beam without connection, while the addition of bamboo does not have a significant effect on the bending capacity of the beam.Post-earthquake development in Indonesia is a complex challenge that requires cross-sectoral efforts and support from various parties. Indonesia is prone to earthquakes due to its location on the Pacific Ring of Fire, an active area of earthquakes and volcanic activity. The use of precast concrete has a number of important advantages in earthquake-prone areas but the connection between joints can be a weak point if not done properly. This study will discuss the connection system, connection location, and details. The research method used is numerical analysis using finite element-based software. It is concluded that the connection system used has not been able to reach the capacity of the monolith beam without connection, while the addition of bamboo does not have a significant effect on the bending capacity of the beam

    Karakteristik Kompresibilitas dan Kuat Geser pada Tanah Lempung Berdasarkan Uji CPT, SPT dan Laboratorium di Cikarang

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    The Jakarta-Cikampek Elevated toll road was built to add to the existing toll road section. In this project, the field investigation tests carried out are the Cone Penetrartion test (CPT) and the Standard Penetration Test (N-SPT). Many studies have been conducted to obtain the compressibility value (cc) and shear strength value (su) of clay because each clay in a region has different compressibility characteristics and shear strength values. This study aims to determine the compressibility characteristics and shear strength of clay in the Cikarang area by using field investigation data in the form of CPT test of 10 points and N-SPT test of 12 points and laboratory data used from N-SPT drill points of 21 tube samples. CPT and N-SPT data are grouped based on the closest distance, the test area is dominated by Sandy clay and the linear regression equation obtained from both data relationships is qc = 0.51N with an upper limit equation qc = 1.2N and for the lower limit qc = 0.2N. From the results of the analysis for the shear strength value of the soil obtained from the relationship of the shear strength value of the soil to the N-SPT of Su = 8N-SPT, and for the level of compressibility at the location in Cikarang has a high level of compressibility with the relationship of compressibility to the pore number (eo) obtained equation Cc = 0.40eo and with the level of activity of relatively inactive clay soil

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    Publikasi Jurnal Universitas Islam 45 is based in Indonesia
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