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Journal : Construction and Material Journal

ANALISIS PERBANDINGAN KUALITAS DAN BIAYA PENGGUNAAN MECHANICAL COUPLER PADA KONSTRUKSI PIER PROYEK MRT JAKARTA CP 103 Saputra, Pungky Dharma
Construction and Material Journal Vol 2, No 3 (2020): CONSTRUCTION AND MATERIAL JOURNAL VOL. 2 NO. 3 NOVEMBER 2020
Publisher : Politeknik Negeri Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

ABSTRACTThe Government of Indonesia is accelerating the development of railway infrastructures. MRT is a milestone in the development of railway infrastructures in Indonesia since 2013. The elevated construction uses a single pier structure with a main reinforcement bar diameter of 40 mm. However, the conventional overlapping connection is unsuitable; hence it used a mechanical coupler connection. This research focused on the quality and cost comparison of using a mechanical coupler as a reinforcing connection in the MRT CP 103 Project's pier construction. The variables which would be studied were conventional connection and mechanical coupler connection. There were two stages in this research: quality testing in an independent laboratory and a cost comparison analysis. The data used were primary data from quality testing results, and secondary data were the project volume and unit price. The project sample in this research was MRT CP 103 Project with Pier AP 29 as the case study. The analytical approach used was descriptive analysis by making a comparison of the two variables. According to the quality test results, the tensile strength of the reinforcement was 665.56 N/mm2 and the mechanical coupler tensile strength was 626.33 N/mm2 . According to the calculation results of the case study on Pier AP29, it was found that the price difference was IDR2,246,622 or 6.17% cheaper than conventional connection. Further analysis showed that the mechanical coupler connection with 40 mm diameter was very effective because it was cheap. This research can be used as a reference in the alternative selection of reinforcement connection.Keywords : Quality, Cost, Mechanical Coupler; Pier; MRT CP 103 ProjectABSTRAKPembangunan infrastruktur kereta api sedang dipercepat oleh Pemerintah Indonesia. MRT merupakan tonggak sejarah perkembangan infrastruktur kereta api di Indonesia sejak tahun 2013. Pada konstruksi layang digunakan struktur single pier dengan diameter tulangan utama 40 mm. Namun, penyambungan tulangan dengan sambungan konvensional dianggap tidak tepat, sehingga menggunakan sambungan mechanical coupler. Penelitian ini berfokus pada perbandingan kualitas dan biaya penggunaan mechanical coupler sebagai sambungan tulangan pada konstruksi pier Proyek MRT CP 103.Variabel yang akan diteliti adalah sambungan tulangan konvensional dan sambungan mechanical coupler. Penelitian ini terdiri dari dua tahap yaitu pengujian kualitas pada laboratorium independent dan tahap kedua adalah dengan melakukan analisis perbandingan biaya. Data yang digunakan adalah data primer hasil pengujian kualitas dan data sekunder yaitu volume dan harga satuan dasar proyek. Sampel proyek penelitian ini adalah Proyek MRT CP 103 dengan Pier AP29 sebagai studi kasusnya. Pendekatan analisis yang digunakan adalah analisis deskriptif dengan mencari perbandingan kedua variabel. Dari hasil pengujian kualitas didapat nilai kuat tarik tulangan sebesar 665.56 N/mm2 dan kuat tarik mechanical coupler sebesar 626.33 N/mm2 . Dari hasil perhitungan studi kasus pada Pier AP 29 didapat selisih sebesar IDR2,246,622 atau 6.17% lebih murah dari sambungan tulangan konvensional. Hasil analisis selanjutnya menunjukkan sambungan mechanical coupler sangat efektif bila digunakan diameter 40 mm karena murah. Penelitian ini dapat dijadikan referensi dalam alternatif pemilihan sambungan tulangan.Kata kunci : Kualitas; Biaya; Mechanical Coupler; Pier; Proyek MRT CP 103.
ANALISIS PERBANDINGAN KUALITAS DAN BIAYA PENGGUNAAN MECHANICAL COUPLER PADA KONSTRUKSI PIER PROYEK MRT JAKARTA CP 103 Pungky Dharma Saputra
Construction and Material Journal Vol. 2 No. 3 (2020): Construction and Material Journal Vol. 2 No. 3 November 2020
Publisher : Politeknik Negeri Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32722/cmj.v2i3.3581

Abstract

The Government of Indonesia is accelerating the development of railway infrastructures. MRT is a milestone in the development of railway infrastructures in Indonesia since 2013. The elevated construction uses a single pier structure with a main reinforcement bar diameter of 40 mm. However, the conventional overlapping connection is unsuitable; hence it used a mechanical coupler connection. This research focused on the quality and cost comparison of using a mechanical coupler as a reinforcing connection in the MRT CP 103 Project's pier construction. The variables which would be studied were conventional connection and mechanical coupler connection. There were two stages in this research: quality testing in an independent laboratory and a cost comparison analysis. The data used were primary data from quality testing results, and secondary data were the project volume and unit price. The project sample in this research was MRT CP 103 Project with Pier AP 29 as the case study. The analytical approach used was descriptive analysis by making a comparison of the two variables. According to the quality test results, the tensile strength of the reinforcement was 665.56 N/mm2 and the mechanical coupler tensile strength was 626.33 N/mm2 . According to the calculation results of the case study on Pier AP29, it was found that the price difference was IDR2,246,622 or 6.17% cheaper than conventional connection. Further analysis showed that the mechanical coupler connection with 40 mm diameter was very effective because it was cheap. This research can be used as a reference in the alternative selection of reinforcement connection. Keywords : Quality, Cost, Mechanical Coupler, Pier, MRT CP 103 Project.
IDENTIFIKASI AKTIVITAS PEKERJAAN PEMANCANGAN DENGAN METODE INNER BORING PADA PROYEK PEMBANGUNAN TANGGUL PENGAMAN PANTAI NCICD Fadilah, Rifdah; Saputra, Pungky Dharma; Siagian, Gian Asnawi
Construction and Material Journal Vol. 7 No. 1 (2025): Construction and Material Journal Vol. 7 No. 1 Mei 2025
Publisher : Politeknik Negeri Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32722/cmj.v7i1.7463

Abstract

Coastal infrastructure development is a strategic initiative to mitigate tidal flooding in North Jakarta. One of the main projects supporting this effort is the construction of a coastal protection embankment under the National Capital Integrated Coastal Development (NCICD) program. This study aims to identify the stages involved in pile driving using the inner boring method for the NCICD Phase A embankment construction. Compared to conventional methods, the inner boring method was selected due to its advantages in minimizing noise, vibration, and environmental pollution. A mixed-method approach was employed, including video analysis of construction methods, project documentation, surveys, and expert validation. The research identified six primary activities in the pile-driving process: sling installation, pile lifting, shifting, and adjusting the drilling point, auger installation, drilling, and excavation disposal. Survey results showed that nearly all respondents fully agreed with the identified sequence of activities, with two exceptions—sling installation (93%) and pile lifting (87%). Expert validation confirmed full (100%) approval of all identified activities. These activities were subsequently structured into a Work Breakdown Structure (WBS) to improve the efficiency and effectiveness of construction operations. The expert validation results indicate that the identified activity sequence can serve as a reference for similar coastal construction projects. This study is expected to contribute to future embankment construction planning by optimizing time, resources, and workplace safety.
ANALISIS KRITERIA PEMILIHAN METODE KONSTRUKSI CAPPING BEAM TANGGUL PENGAMAN PANTAI NCICD JAKARTA UTARA Norita, Khansa; Saputra, Pungky Dharma; Z, Yanda Dwira Firman
Construction and Material Journal Vol. 7 No. 1 (2025): Construction and Material Journal Vol. 7 No. 1 Mei 2025
Publisher : Politeknik Negeri Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32722/cmj.v7i1.7464

Abstract

The annual flooding that affects the capital city of the Republic of Indonesia is a critical issue being addressed through solutions outlined in the NCICD (National Capital Integrated Coastal Development) master plan. The capping beam, which forms the upper structure of the embankment, breaks waves, unites the spun pile series, and maintains the stability of the spun pile. The main objective of this study is to identify the criteria for selecting the capping beam construction method in the NCICD coastal protection embankment development project. The method used is a systematic approach to literature published in the form of articles or journals and scientific publications. The results of the study show that there are nine criteria for selecting the method of capping beam construction. The criteria that are widely discussed and have a dominant influence are the cost criteria and environmental conditions, with each having a percentage of 19%. This study provides valuable insights for academics and practitioners in developing effective strategies for construction method selection.
PENINGKATAN MANAJEMEN KONSTRUKSI MELALUI INTEGRASI DIGITAL TECHNOLOGY:A LITERATURE REVIEW Paulina Purba, Anggie Ria; Safura, Ferenia; Saputra, Pungky Dharma
Construction and Material Journal Vol. 7 No. 2 (2025): Construction and Material Journal Vol. 7 No. 2 Oktober 2025
Publisher : Politeknik Negeri Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32722/cmj.v7i2.7868

Abstract

The construction industry is undergoing a major transformation with the introduction of digital technologies and the emergence of more complex risk management systems. The aim of this study is to identify the latest developments in construction management based on a review of recent literature. The method used was a systematic approach to literature published in scientific journals and international conferences, focusing on topics such as digital transformation, risk management in construction projects, and sustainability. The results indicate that the implementation of technologies such as Building Information Modeling (BIM), the Internet of Things (IoT), and Artificial Intelligence (AI) is increasing, supporting efficiency and more accurate decision-making. Furthermore, sustainability has become a key focus in modern construction projects, with the adoption of environmentally friendly materials and sustainable building practices. This study provides valuable insights for academics and practitioners in adopting innovations and improving efficiency in construction project management.