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Mardiaman, Mardiaman
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Optimalisasi Penghematan Energi Listrik Untuk Penerangan Di Gedung Utama Mako Polres Jakarta Barat Pandu Wiyana, Dian; Mardiaman, Mardiaman
Prosiding TAU SNARS-TEK Seminar Nasional Rekayasa dan Teknologi Vol. 3 No. 1 (2024): Prosiding TAU SNARS-TEK Seminar Nasional Rekayasa dan Teknologi 2024
Publisher : Fakultas Teknik dan Teknologi - TANRI ABENG UNIVERSITY

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.47970/snarstek.v2i1.550

Abstract

Gedung perkantoran banyak mengkomsumsi enerji listrik. Penggunaan enerji listrik berdampak pada terjadinya pemanasan global. Konsep green building sangat membantu dalam mengoptimalkan pemanfaatan enerji listrik. Parameter ke dua dari green bulding adalah efisiensi enerji. Pemanfaatan sumber enerji lain selain bahan bakar dan optimalisasi penggunaan fitur-fitur hemat listrik sangat mendesak saat ini mengingat semakin langkanya bahan bakar minyak dan batu bara. Penelitian ini mencoba mengevaluasi optimalisasi penggunaaan enerji pada gedung mako polres Jakarta Barat. Tujuan penelitian untuk mengetahui fitur-fitur penerangan dan kesesuaian lampu yang terpasang dengan fungsi ruangan serta efisiensi enerji listrik. Jenis penelitian bersifat deskriptif ekploratif dengan pendekatan kuantitatif. Data dikumpulkan mulai Maret sampai Agustus 2023 dengan wawancara dan survai lapangan. Hasil olahan data pengunaan jumlah lampu yang sesuai dengan kebutuhan ruangan menghasilkan pengurangan pemakaian enerji listrik dari 357,244 ke 345,388 kWh dengan tingkat efisiensi sebesar 3,18%. Rekomendasi penghematan untuk gedung perkantoran adalah dengan budaya hemat energy bagi pekerjanya.
Rasio Daya Dukung Aksial Bored Pile Berdasarkan Hasil Uji SLT dan PDA (Studi Kasus: Tamansari Apartemen Bintaro Mansion Kota Tangerang Selatan) Muhammad Libasut Taqwa, Fadhila; Mardiaman, Mardiaman; Hariati, Feril; Muktadir, Redho
Prosiding TAU SNARS-TEK Seminar Nasional Rekayasa dan Teknologi Vol. 3 No. 1 (2024): Prosiding TAU SNARS-TEK Seminar Nasional Rekayasa dan Teknologi 2024
Publisher : Fakultas Teknik dan Teknologi - TANRI ABENG UNIVERSITY

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.47970/snarstek.v2i1.567

Abstract

Pondasi dalam merupakan struktur bawah suatu konstruksi yang berfungsi untuk meneruskan beban konstruksi ke lapisan tanah keras yang berada jauh dari permukaan tanah. Penelitian ini bertujuan untuk memberikan gambaran respon daya dukung aksial tiang bor tunggal diameter 1000mm melalui pendekatan matematis berdasarkan hasil pengujian yang dilakukan. Daya dukung aksial rencana diperkirakan melalui analisis hasil penyelidikan tanah (hasil uji N-SPT, hasil uji DCPT, dan hasil pemeriksaan laboratorium), daya dukung aksial aktual diperoleh melalui interpretasi hasil Uji Beban Statis (SLT) dengan metode Davisson, Mazurkiewicz, dan Chin, sedangkan hasil uji beban PDA (Pile Driving Analyzer) dianalisis menggunakan aplikasi CAP-WAP. Daya dukung aksial direncanakan sebesar 250ton, sedangkan daya dukung aksial rata-rata berdasarkan hasil interpretasi SLT pada tiga tiang pancang yang diuji dengan metode Davisson, Mazurkiewicz, dan Chin berturut-turut sebesar 385; 448; dan 216ton. Nilai daya dukung aktual berdasarkan hasil pengujian PDA adalah sebesar 565ton. Hasil analisa tersebut diperbandingkan dengan nilai daya dukung rencana dan daya dukung uji SLT, sehingga diperoleh nilai Bearing Capacity Ratio (BCR). Berdasarkan interpretasi uji PDA dan CAP-WAP nilai BCR berturut-turut adalah sebesar 62.8% dan 67.8%. Nilai BCR berdasarkan interpretasi hasil uji SLT sebesar 42.8%, 48,0%, dan 25,5%. Dengan demikian, tiang bor tersebut berada dalam kondisi kinerja yang buruk. Dengan membandingkan nilai BCR terhadap beban uji rencana, diperoleh nilai rasio daya dukung (BCR) berdasarkan interpretasi uji PDA dan CAP-WAP berturut-turut sebesar 226.0% dan 244.4%. Nilai BCR berdasarkan interpretasi hasil uji SLT dengan metode Davisson, Mazurkiewicz, dan Chin berturut-turut sebesar 154.0%, 172.8%, dan 91.9%. Dengan demikian, interpretasi menggunakan metode Davisson dan Mazurkiewicz menunjukkan nilai BCR lebih dari 1,5 yang berarti pemilihan beban rencana pada saat SLT cenderung konservatif. Namun, mengingat nilai faktor keamanan yang memadai diperlukan, maka pondasi tersebut dianggap berfungsi dengan baik. Sedangkan berbeda dengan metode Chin yang nilai BCR-nya kurang dari 1, artinya pondasi menerima beban melebihi daya dukungnya. Hal ini perlu menjadi pertimbangan, apakah terdapat ketidaksesuaian metode yang diterapkan, kesalahan dalam proses penafsiran data, atau jika dan hanya jika analisis dengan metode Chin lebih akurat, maka perlu dilakukan perkuatan pada sistem pondasi.
Evaluasi Efisiensi Air Gedung Perkantoran Pada Musim Kering Pada Perencanaan Bangunan Gedung Hijau Mardiaman, Mardiaman; Victorio Siahaan, Tirto Amsal
Jurnal Talenta Sipil Vol 7, No 1 (2024): Februari
Publisher : Universitas Batanghari Jambi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33087/talentasipil.v7i1.481

Abstract

Water is necessary for various human activities. The larger the population, the greater the water consumption. Harnessing rainwater and reusing recycled grey and black water can reduce consumption. Water efficiency needs to be a concern because of the limited availability of water and to maintain limited water availability. Water consumption in buildings for office functions is relatively high. Therefore, office buildings are very important to be designed as environmentally friendly buildings. Water efficiency is a criterion for eco-friendly buildings, more commonly known as green buildings. This research aims to improve water efficiency by utilizing rainwater and recycled water in the Waskita Karya building. The secondary data collection required is at the planning stage. The data collected are water-saving features, rainfall, building area of each floor, site plan, and other relevant data. Water efficiency calculations take into account wet and dry days. On wet days because water comes from rain, and on dry days, the water source is only from PDAM and recycled water. Software issued by the Directorate General of Copyright calculates the water balance. The calculation will result in water savings on dry days. Conventional water consumption amounted to 83,153 lt / day, water source from recycled grey water 29,216 lt / day, black water 14,143 lt / day, efficiency on dry days amounted to 76.8%. This research needs to be implemented so that building owners know their water consumption and can support green building performance and water cost savings.
Studi Perbandingan Biaya pada Pekerjaan Pembongkaran Balok Girder di Proyek Penggantian Jembatan Cinagara Suhendar, Tatang; Mardiaman, Mardiaman; Azhar, Moh; Taqwa, Fadhila Muhammad Libasut
Jurnal Komposit: Jurnal Ilmu-ilmu Teknik Sipil Vol. 9 No. 1 (2025)
Publisher : Universitas Ibn Khaldun

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32832/komposit.v9i1.17332

Abstract

There are 3 (three) alternative methods for dismantling bridge girders in the Cinagara Bridge replacement project, to find the most efficient and safe approach. The Cinagara Bridge, which is on the Ciawi – Sukabumi national road, Caringin district, Bogor Regency, located in a densely populated area and also close to the installation of the PGN pipeline network and PLN cable lines. This research aims to choose the implementation method with the most efficient costs, while still paying attention to safety and ease of work. The three alternative methods are: dismantling by lifting and moving the girder beam as a whole; dismantling by lifting the girder beam as a whole, then moving it segment by segment; and dismantling by breaking the girder beams on the spot and dropping them into the river, to be then moved outside the site. The research results show that the third method, namely breaking the girder beam on the spot and dropping it into the river, has the lowest implementation cost of IDR 86,637,250.00 and efficient implementation time. This method also ensures that the demolition results can be mobilized outside the project site and has the lowest risk of accidents. The first and second methods cost IDR 365,762,935.00 and IDR 170,301,233.00 respectively, and face various technical challenges and social risks. This research provides recommendations for using the third method with appropriate adjustments to ensure a smooth dismantling process, minimize environmental impacts, and maximize work safety. Apart from that, it is important to carry out routine equipment inspections, arrange demolition times during the day, and install safety nets to protect the surrounding area from demolition debris. Thus, this research can be a reference in choosing an effective demolition method for similar projects
Evaluasi Strategi Lot Sizing pada MRP untuk Optimasi Biaya Logistik Material Konstruksi Simanjuntak, Martua; Mardiaman, Mardiaman
Jurnal Talenta Sipil Vol 8, No 2 (2025): Agustus
Publisher : Universitas Batanghari Jambi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33087/talentasipil.v8i2.923

Abstract

Material Requirement Planning (MRP) is a critical approach for managing material procurement in construction projects to ensure timely delivery, avoid surplus inventory, and optimize logistical costs. In construction, inefficient planning often results in material shortages, excess stock, and delayed project completion, contributing to significant cost overruns. The choice of lot sizing strategy within the MRP system plays a central role in balancing ordering frequency and storage costs. While classical methods such as Economic Order Quantity (EOQ), and  Lot for Lot (LFL) are widely known, limited studies have applied a comparative evaluation of these methods specifically in construction logistics under real-world constraints. Most prior research emphasizes manufacturing applications, leaving a knowledge gap in dynamic, schedule-driven environments like public infrastructure projects. This study evaluates two lot sizing strategies, EOQ and LFL, using empirical data from a palm oil mill construction project in Mandailing Natal, Indonesia. A quantitative descriptive method was applied, utilizing data from master production schedules, bill of quantities (BOQ), and actual procurement cost records. The evaluation measured total procurement costs, ordering frequency, and inventory levels. The findings reveal that the LFL strategy results in the lowest total logistic cost at Rp 685,976,950.54, compared to EOQ at Rp 769,658,817.20, due to the complete elimination of holding costs despite higher ordering frequency. This implies that LFL is more suitable for government construction projects with short-term schedules and varying material demands, where minimizing storage risk is prioritized. The study contributes to procurement optimization under Indonesia’s public goods and services framework and recommends selective lot sizing strategies based on material characteristics and project dynamics.
Studi Perbandingan Produktivitas Teori dan Realitas pada Pekerjaan Konstruksi Keselamatan Pesisir di Teluk Jakarta Tahap 6 Paket 4 Widhitomo, Kurniawan; Azhar, Moh; Mardiaman, Mardiaman
Jurnal Talenta Sipil Vol 8, No 2 (2025): Agustus
Publisher : Universitas Batanghari Jambi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33087/talentasipil.v8i2.952

Abstract

Coastal protection infrastructure in Jakarta Bay is essential to mitigate flooding due to sea level rise and land subsidence. The use of spun piles with inner boring methods supported by Hydraulic Static Pile Driver (HSPD) technology is intended to ensure efficient and low-impact pile driving operations. However, in practice, productivity discrepancies between theoretical planning and field realization remain a significant issue. This study aims to analyze and compare theoretical productivity (based on contractual planning) with actual field productivity in the installation of spun piles for a coastal safety project in Jakarta Bay Phase 6 Package 4. A descriptive quantitative approach was used, combining direct field observations, time-lapse video analysis, and secondary data from contract documents. Productivity was measured in meters per hour (m/h) and piles per day (piles/day). Deviations between theoretical and actual productivity were identified, and causal factors were analyzed. Theoretical productivity was 3.59 m/h with 3.5 piles/day, while actual field productivity reached only 3.2 m/h with 3.33 piles/day. This discrepancy resulted in an estimated delay of 5 workdays (4.8% deviation). The primary contributing factors were inconsistent hydraulic pressure, environmental constraints, equipment limitations, and varying operator skill levels. The study confirms that real-time monitoring and productivity assessment tools are crucial for timely project delivery. It also highlights the need for adaptive planning and systematic operator training. The findings provide practical guidance for enhancing productivity in future coastal foundation projects using HSPD technology.
Evaluasi Produktivitas Angkat Baja pada Bangunan Pabrik Kelapa Sawit Silitonga, Desmon; Mardiaman, Mardiaman; Indriasari, Indriasari
Jurnal Talenta Sipil Vol 8, No 2 (2025): Agustus
Publisher : Universitas Batanghari Jambi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33087/talentasipil.v8i2.957

Abstract

The growth of the industrial sector in Indonesia has driven the widespread use of steel structures due to their advantages in strength, construction speed, and cost efficiency. One significant application is in the construction of palm oil mills (PKS), which often face challenging site conditions requiring effective erection planning. However, steel structure erection productivity in PKS projects is frequently hindered by inappropriate work methods and unsystematic time recording. Significant variations in productivity across structural elements and the lack of comparative studies between crane and manual methods create a research gap that needs to be addressed. This study aims to evaluate and compare the productivity of steel structure erection in the Mill Building of a PKS project using crane and manual methods. A quantitative case study approach was applied at PT. Tunggal Yunus Estate, Tapung, Riau, with primary data collected through field observations, interviews, and project documentation. Productivity (kg/hour) was calculated based on the weight and installation duration of each structural element. The results show an average erection productivity of 480.98 kg/hour, with the highest productivity reaching 955.44 kg/hour for main columns and rafters using a crane. In contrast, manual methods for secondary elements such as wind bracing and canopy yielded the lowest productivity at 156.78 kg/hour. These findings confirm that crane methods are more effective for main structural elements, while the use of manual methods should be carefully adapted to site conditions to maintain time-cost efficiency.
Analisis Data Operasional Mrt Fase 1 terhadap Prediksi Jumlah Penumpang di Fase 2 Aswinto, Aswinto; Azhar, Moh; Mardiaman, Mardiaman
Jurnal Talenta Sipil Vol 8, No 2 (2025): Agustus
Publisher : Universitas Batanghari Jambi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33087/talentasipil.v8i2.929

Abstract

Urban congestion in rapidly growing cities like Jakarta necessitates efficient, data-driven transportation planning. As part of Indonesia’s efforts to modernize its urban mobility systems, the Jakarta Mass Rapid Transit (MRT) has emerged as a strategic initiative to reduce traffic dependency on private vehicles. While Phase 1 of MRT Jakarta has been operational since 2019, Phase 2 development requires a reliable forecasting framework to anticipate future passenger demand and support infrastructure planning. However, previous studies often rely on macroeconomic projections rather than empirical operational data, leaving a gap in predictive accuracy. This study aims to analyze the influence of MRT Jakarta phase 1 operational data on the prediction of passenger numbers in phase 2 as the basis for evidence-based transportation development planning using a hybrid approach: ARIMA forecasting and multiple linear regression modeling. Primary data were gathered from 125 MRT users via Likert-scale surveys, while secondary data were derived from MRT Jakarta’s operational reports from 2019–2023. Here we show that service quality and multimodal integration significantly increase ridership, while fare levels and poor accessibility negatively affect passenger volume. The ARIMA model, however, shows limited accuracy (R² = 0.164; MAPE = 62.225%), indicating high variability due to pandemic-induced fluctuations. In contrast, regression analysis explains 44.1% of ridership variation, offering a more actionable basis for forecasting. These findings suggest that MRT Phase 2’s success will depend not only on physical expansion but also on improved intermodal integration, user-centered service quality, and competitive fare strategies. The study contributes to transport planning by integrating quantitative modeling with user behavior insights for data-driven infrastructure scheduling.
Menentukan Biaya Dan Waktu Pelaksanaan Erection Konstruksi Baja Mill Building Pabrik Kelapa Sawit Silitonga, Desmon; Mardiaman, Mardiaman
Syntax Literate Jurnal Ilmiah Indonesia
Publisher : Syntax Corporation

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36418/syntax-literate.v10i6.59942

Abstract

This research aims to assess the costs and duration associated with the erection of steel structures in the Mill Building of PT. Tunggal Yunus Estate Palm Oil Mill, located in Kampar, Riau. The palm oil sector plays a significant role in Indonesia's economy, making the presence of Palm Oil Mills (PKS) essential for palm oil production. Utilizing a quantitative methodology with a case study approach, the study analyzes work volume, equipment and labor productivity, as well as cost and time estimations. Results reveal that the erection period for the steel structure is 40 calendar days, which corresponds with the actual time recorded on-site. The overall cost of erection is IDR 276,075,000.00, resulting in a unit cost of IDR 1,854/kg. Various factors affecting costs and duration include weather conditions, the challenging muddy terrain of the project site, and the coordination among work teams. This study offers valuable insights for the planning and budgeting of future steel construction projects within the palm oil industry.
Evaluasi Kinerja Operasional dan Finansial Angkutan Penyeberangan di Pelabuhan Merak Irawan, Dedy; Mardiaman, Mardiaman
Jurnal Ilmiah Universitas Batanghari Jambi Vol 24, No 1 (2024): Februari
Publisher : Universitas Batanghari Jambi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33087/jiubj.v24i1.4348

Abstract

Merak Port is a port that serves ferry services from the Merak-Bakauheni crossing, located in Pulo Merak District, Cilegon City, Banten, Java Island. The port operates 24 hours with ships operating at least 30 units per day out of a total of 65 ships. So that cumulatively for effective ship operation by 46% for 1 year, the purpose of this study is to see the existing operational and financial performance by using profitability ratios namely net profit margin (NPM) and return on investment (ROI) with research methods using descriptive methods comparative and quantitative approach, the evaluation results show that operational performance based on the frequency of ship trips only reaches 77% or as many as 37,515 trips/year from the prevailing operating pattern of 48,960 trips/year, while the financial performance based on profitability ratios seen from the NPM value of 39% and ROI of 84% is greater than the condition of the operating pattern according to the pattern with an NPM value of 35% and ROI of 74% which means that the operating pattern according to the existing schedule is greater than the actual condition, but overall the profitability ratio is still above average or positive value.
Co-Authors Aswinto, Aswinto Azhar, Moh Fadhila Muhammad Libasut Taqwa Feril Hariati Indriasari, Indriasari Irawan, Dedy Moh Azhar Muktadir, Redho Pandu Wiyana, Dian Silitonga, Desmon Simanjuntak, Martua Suhendar, Tatang Victorio Siahaan, Tirto Amsal Widhitomo, Kurniawan