Article Per Year (5 Year)
p-Index From 2021 - 2026
2.332
P-Index
This Author published in this journals
All Journal Jurnal Ilmiah Universitas Batanghari Jambi JURNAL SUMBER DAYA AIR Journal of Sustainable Civil Engineering (JOSCE) Menara: Jurnal Teknik Sipil Jurnal Komposit : Jurnal Ilmu-Ilmu Teknik Sipil International Journal of Civil Engineering and Infrastructure (IJCEI)
Sembiring, Kristina
Unknown Affiliation
Agriculture, Biological Sciences & Forestry Civil Engineering, Building, Construction & Architecture Decision Sciences, Operations Research & Management Economics, Econometrics & Finance Education Engineering Environmental Science Law, Crime, Criminology & Criminal Justice Materials Science & Nanotechnology Transportation

Published : 15 Documents Claim Missing Document
Claim Missing Document
Check
Articles

Found 15 Documents
Search

 1   2 
PERHITUNGAN AWAL IMBUHAN AIRTANAH ALAMI DAERAH ALIRAN SUNGAI CIKAPUNDUNG-GANDOK (KAJIAN PERBANDINGAN) Al Hasyir, Muhammad Humaam; Soenarto, Bambang; Nurhayati, Yayah; Sembiring, Kristina; Tua Naibaho, Pio Ranap
JURNAL SUMBER DAYA AIR Vol 20, No 2 (2024)
Publisher : Direktorat Bina Teknik Sumber Daya Air, Kementerian Pekerjaan Umum dan Perumahan Rakyat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32679/jsda.v20i2.902

Abstract

Groundwater recharge is a crucial factor in determining the permissible groundwater extraction within a watershed. In the Cikapundung watershed, the contribution of groundwater to raw water supply has been continuously declining, prompting a shift from groundwater to surface water usage. This study aims to quantify the groundwater recharge volume and recharge coefficient for each geological formation within the Cikapundung-Gandok watershed, covering an area of 90.4 km², and to compare the results with previous studies. The analysis estimates recharge volumes based on rainfall data from 8 stations around the Cikapundung-Gandok watershed from 2010 to 2019, geological formation data, and alternative recharge coefficients. The difference in recharge volume from previous studies is 393,348 m³/year or 1%. Two formations, Qvu and Qyu, which were not identified in earlier studies, supplement the existing geological dataset. The selected recharge volume for the Cikapundung-Gandok watershed is 33,232,004 m³/year or 1.05 m³/s, with the lowest contribution from the Lava formation (Qyl) at 1,364,504 m³/year or 0.04 m³/s and the highest from the Old Volcanic Product (Qvu) at 14,072,243 m³/year or 0.45 m³/s. The tentative recharge coefficients for each rock formation are as follows: Colluvium (Qc) 30%; Unweathered Old Volcanic Product (Qvu) 20%; Sand Tuff (Qyd) 10%; Lava (Qyl) 25%; Pumiceous Tuff (Qyt) 20%; and Young Volcanic Product (Qyu) 20%. The groundwater recharge data obtained can be used to set groundwater extraction limits and to plan for groundwater management using a conservative approach to ensure long-term sustainability.Keywords: groundwater recharge, recharge coefficient, geological formation, groundwater exploitation, Cikapundung-Gandok Watershed
Perbandingan Biaya dan Waktu Pelaksanaan Deck on Pile dengan Cakar Ayam Modifikasi pada Pembangunan Dermaga Jakarta International Container Terminal 2 Yulianto, Yulianto; Azhar, Moh.; Naibaho, Pio Ranap Tua; Sembiring, Kristina
Jurnal Komposit: Jurnal Ilmu-ilmu Teknik Sipil Vol. 10 No. 1 (2026)
Publisher : Universitas Ibn Khaldun

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32832/komposit.v10i1.20507

Abstract

Indonesia as a maritime country is required to be able to follow the development of the international world to become the world's maritime axis, by developing medium and large ports and encouraging investment in the maritime sector on a large scale. Trisakti Terminal, Tanjung Priok branch, North Jakarta is a busy terminal among ten other terminals managed by PT. Pelabuhan Indonesia I (Persero) which serves general cargo and dry bulk types both domestically and internationally. This study aims to compare the efficiency values ​​obtained from the application of deck on slab foundations with modified spread footing foundation (Cakar Ayam Modifikasi). In the construction work of modified spread footing foundation, the cost of the work is Rp51,099,780,000, with an implementation time of 240 calendar days, while in the construction of Deck on Pile the total cost of the work is Rp88,160,700,000, with an implementation time of 240 calendar days, strict supervision is needed after concrete piling because the remaining implementation time is 14 weeks. The cost efficiency of the modified spread footing foundation work on Deck on Pile is 40%, while the time efficiency of the modified spread footing foundation work on Deck on Pile is 11%.
Analisis Penerapan Value Engineering (VE) pada Proyek Konstruksi Menurut Persepsi Owner Febriyanto, Andreas; Priyambodo, Bambang; Naibaho, Pio Ranap Tua; Sembiring, Kristina
Jurnal Komposit: Jurnal Ilmu-ilmu Teknik Sipil Vol. 10 No. 1 (2026)
Publisher : Universitas Ibn Khaldun

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32832/komposit.v10i1.20644

Abstract

The implementation of VE in the construction sector is an approach carried out systematically by a team from many disciplines that focuses on value and function. The implementation of VE in construction projects has the potential for significant savings from the project budget. In the construction world, project owners are often faced with various constraints such as budget constraints, increasing material costs, and the need for time efficiency. VE offers a solution to overcome these constraints with a functional analysis-based approach that aims to increase value by reducing unnecessary costs without reducing the quality of the final product. The implementation of VE carried out in construction projects, the techniques and alternatives used vary, this is due to the approach used, cultural conditions, and different procurement systems. The purpose of this study is to identify VE practices in Indonesia, examine the success factors in these practices, knowledge and experience of VE, and the constraints often faced in VE practices. The research method was carried out by distributing questionnaires to respondents who had knowledge of VE. The data obtained from the questionnaire were analyzed using descriptive analysis. The results of the analysis show that the implementation of VE in Indonesia is carried out on projects that are being proposed and on projects that are underway, the knowledge and experience of construction actors are the main success factors, construction actors have sufficient knowledge about VE, and the lack of knowledge about VE is the main obstacle in the implementation of VE in Indonesia.
Rekayasa Nilai dalam Tahap Reviu Perencanaan Konstruksi (Studi Kasus: Pelabuhan Perikanan Terintegrasi di PPN Pengembangan Bali) Riyadi, Sugeng; Priyambodo, Bambang; Naibaho, Pio Ranap Tua; Sembiring, Kristina
Jurnal Komposit: Jurnal Ilmu-ilmu Teknik Sipil Vol. 10 No. 1 (2026)
Publisher : Universitas Ibn Khaldun

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32832/komposit.v10i1.20677

Abstract

The ongoing construction of the project requires a fairly large allocation of funds, and it is necessary to reconsider whether the design used is optimal. This can be done by reviewing the project planning design so that it is possible to make cost savings by identifying and reducing unnecessary costs without reducing the level of quality, reliability and function of the project itself. Carrying out value engineering techniques, namely carrying out cost analyzes by comparing the costs per item with the details of each job from the contractor's offer to find the cheapest price up to the negotiation stage for cost savings and efficiency. The AHP (Analytic Hierarchy Process) method can be used as a solution to problems in finding decisions, and for assessment using a Likert scale questionnaire. Value engineering in the planning review by taking a case study of an ongoing project in the Pengambengan area of ​​Bali, namely the integrated fishing port project. There are 3 alternatives compared to the planning budget, namely breakdown analysis techniques (Work Breakdown Structure), cost modeling techniques (Cost modeling techniques), and Delphi techniques (Delphi Teqhnique). In value engineering, you can see the price comparison for each work item for planning reviews. The results for the final review based on value engineering RAB planning estimate Rp. 1,626,877,637,500. The stages in the AHP method analysis are determining the objective of the analysis, namely value engineering in selecting contractors, determining the analysis criteria: Cost Budget Plan, Detailed Drawings, Technical Specifications, and Implementation Time, as well as determining alternative options
Analisis Kinerja Konsultan Manajemen Konstruksi Proyek EPC pada Pembangunan Fasilitas Pengolahan Batu Bara di Tanjung Enim, Sumatera Selatan Brillianto, Ananta Giga; Priyambodo, Bambang; Naibaho, Pio Ranap Tua; Sembiring, Kristina
Jurnal Komposit: Jurnal Ilmu-ilmu Teknik Sipil Vol. 10 No. 1 (2026)
Publisher : Universitas Ibn Khaldun

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32832/komposit.v10i1.21713

Abstract

Engineering, Procurement, and Construction (EPC) projects face complex challenges such as multidisciplinary coordination, tight schedules, material procurement risks, and design change dynamics, which require the crucial role of Construction Management Consultants (CMCs) in ensuring the achievement of time, cost, and quality targets. This study analyzes the influence of expert competence, quality management, and communication on CMC performance in the coal processing facility construction project in Tanjung Enim, South Sumatra. The study employs a quantitative approach using research instruments developed based on indicators of expert competence, quality management, and communication. Instrument validation was conducted using item analysis with Pearson's product-moment correlation coefficient, while reliability was measured using Cronbach's Alpha coefficient. Data were analyzed using partial correlation and multiple regression techniques. The results of the study indicate: (1) Expert competence has a significant positive effect on KMK performance (ry1 = 0.377 > 0) with the regression equation Ŷ = 19.843 + 0.144 X1; (2) Quality management has a significant effect (ry2 = 0.543 > 0) with the equation Ŷ = 19.040 + 0.174 X2; (3) Communication makes an important contribution (ry3 = 0.471 > 0) with the equation Ŷ = 19.590 + 0.152 X3. Multiple regression analysis shows that the three variables together explain 82% of the variance in performance (ry123 = 0.9272 > 0) with the equation Ŷ = 3.9547 + 0.200 × X1 + 0.1995 × X2 + 0.2237 × X3. These findings confirm that the performance of construction management consultants on EPC projects is significantly influenced by expert competence, quality management, and communication. The study recommends the need for standardization of competencies, implementation of an integrated quality management system, and development of an effective communication model to improve the performance of CMC on similar projects.
Co-Authors Abdul Ghofar Al Hasyir, Muhammad Humaam Arisyi, Luthfan Azhar, Moh. Bambang Priyambodo, Bambang Bambang Sunarto Bangun, Sempurna Brillianto, Ananta Giga Dewita, Hikma Febriyanto, Andreas Hutagalung, Jethro Lukito Laksono, Arvidya Esta Lisa, Ulfa Sama Nosi, Leonardus Nurafifah, Nabilah Mawadah Nurhayati, Yayah Nurhikmah, Salmah Pio Ranap Tua Naibaho S, Daniel Soenarto, Bambang Sri Maharani Sugeng Riyadi Yulianto Yulianto Zulma, Nabillah