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Universitas HKBP Nommensen
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ANALISIS GEOGRID SEBAGAI TULANGAN PADA DINDING PENAHAN TANAH Johan Oberlyn Simanjuntak; Bartholomeus; Yetty Riris Saragi; Humisar Pasaribu; Arnita Silaban
Jurnal Visi Eksakta Vol. 2 No. 1 (2021): Jurnal Visi Eksakta : Edisi Januari
Publisher : LPPM Universitas HKBP Nommensen

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (474.129 KB)

Abstract

The soil reinforcement system or reinforced earth was first introduced by Vidal in 1969. In addition, soil reinforcement has been applied in the construction of dams, embankments, raft foundations and supporting structures for ports and others. With the same concept as reinforced concrete, the reinforcement in the soil is in the form of sheet reinforcement, namely the geogrid relies on its high tensile strength. As concrete resists compression, reinforcement resists tension, so reinforcement in soil is useful for forming composite materials that work together to withstand the loads acting on construction, in this case the construction of retaining walls. In this study, a retaining wall will be analyzed in the form of an arrangement of concrete blocks as high as 6 meters with a foundation width of 2.5 meters and a thickness of 1 meter. On the soil side of the embankment, an analysis will be carried out with and without using a geogrid as reinforcement, where in the analysis of retaining walls with a geogrid several different configurations will be used for each layer thickness of the embankment (SV). The type of embankment soil used is granular soil (cohesiveless) with varying shear angles, f1 = 250, f2 = 300, f3 = 350, and f4 = 400. At the top of the embankment, there are pavement loads and traffic loads. of 15 kN/m. In this study, the retaining wall is planned to be able to withstand the loads acting on it, both from the outside and from the internal. Furthermore, as a comparison of results, to analyze or check the landslide field and stability for embankments using a geogrid and without geogrid, the Finite Element (OptumG2 for academics) method is used. Based on the analysis that has been done, it is found that the denser the geogrid reinforcement used in retaining walls, the higher the safety factor. The shear angle of a soil greatly affects the length of the geogrid. In addition, the smaller the shear angle, the higher the maximum stress value (Tmax) on the geogrid.
ANALISA KONTRAK PROYEK KONSTRUKSI DI INDONESIA Johan Oberlyn Simanjuntak; Bartholomeus; Salomo Simanjuntak; Partahi Lumbangaol; Astri Agnes
Jurnal Visi Eksakta Vol. 2 No. 2 (2021): Jurnal Visi Eksakta : Edisi Juli
Publisher : LPPM Universitas HKBP Nommensen

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (364.711 KB) | DOI: 10.51622/eksakta.v2i2.394

Abstract

The contract is a very importand document in the project. Contract are seen as laws that must be obeyed, govern and control the rights and obligations between service users and service providers in the project. In world of construction in Indonesia, the standard used for contract documents must be based on Law No.2 of 2017 on construction services as a guide and guidance in constructions activities in Indonesia. In the international world, FIDIC documents has long been recognized, which is a contractual rule that has been used by many countries. FIDIC has also been widely adapted to government and private projects in Indonesia. The first analysis is to identify the contract documents used in several project in North Sumatera region. This analysis shows that the FIDIC red book document is the most suitable document to be used in several project in North Sumatera. The second analysis is comparing the FIDIC document and the analysis shows that the contract document that best matches the points in the questionnaired is Law No. 2 of 2017 on construction services. From the analysis of the previous discussion a conclusion was drawn regarding the philosophy of the work contract discussed was the type of unit price contract based on.
Evaluasi Kinerja Simpang Tiga Tak Bersinyal (Studi Kasus : Jl. Cemara – Jl. Cemara Asri Booulevard Raya) Johan Oberlyn Simanjuntak; Bartholomeus; Rizky M. Buulolo
Jurnal Visi Eksakta Vol. 3 No. 1 (2022): Jurnal Visi Eksakta : Edisi Januari
Publisher : LPPM Universitas HKBP Nommensen

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (722.468 KB) | DOI: 10.51622/eksakta.v3i1.580

Abstract

Along with population growth and the magnitude of development as well as increasing transportation, the number of vehicles or traffic volume on roads is increasing, including one intersection in Deli Serdang Regency which has traffic density every day with concomitant congestion and a decrease in speed in certain road segments. This study aims to analyze the performance of the unsignalized intersection of Cemara Road – Cemara Asri Boulevard Raya Road and find alternatives to solve the problems that exist at the intersection of Cemara Road – Cemara Asri Boulevard Raya Road. The data collection method is carried out within a certain time by studying primary and secondary data. In this study resulted in the conclution that the intersection of Cemara Road – Cemara Asri Boulevard Raya Road experienced the peak of traffic flow on Sunday at 04.00 – 05.00 PM with a traffic volume of 2,782 smp/hour. The actual capacity is 2,451.6 smp/hour. The degree of saturation is 1.134. Based on value of the degree of saturation, the level of service at the intersection into category F exceeds the saturation limit suggested by the Indonesia Road Capacity Manual, which is > 1.00. It is necessary to revisit the three-arm intersection on Cemara Road – Cemara Asri Boulevard Raya Road. An alternative solution that can be given to obstacles found is the need for widening the geometric of the road in order to increase the capacity of the intersection and based on the degree saturation value, it is necessary to install the tools provided (lights traffic).
PREDIKSI PENURUNAN TIMBUNAN JALAN : STUDI KASUS: PENANGANAN DENGAN PRE-LOADING DI TEBING TINGGI, SUMATERA UTARA Bartholomeus; Humisar Pasaribu
Jurnal Teknik Sipil Vol 18 No 1 (2022): Jurnal Teknik Sipil
Publisher : Universitas Kristen Maranatha

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.28932/jts.v18i1.4592

Abstract

One method of handling soil that can be done to speed up the consolidation process is to add a Pre-Loading embankment on top of the plan embankment. In addition, this handling is also carried out to achieve a reduction by the design load, so that the settlement of embankment after the construction period still meets the required criteria and standards. This study was conducted to obtain a comparison of the prediction of embankment settlement with the empirical method using CPT data and the prediction of settlement using the Asaoka Method. In addition, the results of the consolidation coefficient will also be compared which can be used to determine the right time for Pre-Loading excavation during the construction period. The data used are CPT test data in the field as well as laboratory test data and measurement data for the settlement plate settlement closest to the position of the CPT test. From the analysis carried out, it is obtained that the prediction of decline using the Asaoka method is smaller than the prediction of decline using the empirical method using CPT data. In addition, from the analysis, it was found that at locations HB-04 and SP 70, as well as HB-07 and SP 91, showed laboratory consolidation coefficient values (cv-Lab.) which were close to the consolidation coefficients of the Asaoka Method (cv-Asa.), while in HB -05 and SP 79 and HB-06 and SP 85 show a large difference in values. The average comparison of the cv-Lab. consolidation coefficients and CV-Asa. is 58.5%.
Analisis Struktur Portal Bidang Dengan Beban Lateral Menggunakan Metode Elemen Hingga Humisar Pasaribu; Bartholomeus -
SPROCKET JOURNAL OF MECHANICAL ENGINEERING Vol 4 No 2 (2023): Edisi Februari 2023
Publisher : Program Studi Teknik Mesin, Universitas HKBP Nommensen, Medan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36655/sprocket.v4i2.927

Abstract

It is necessary to carry out a safety and comfort inspection of the existing wharf structure to ensure the facility’s service life. To check the safety and comfort, it is necessary to do a structural analysis. In the world of civil engineering, there are many problems in analyzing structures that need to be analyzed for working loads or assessing the existing wharf structures that are loaded by ship berthing loads and loads on the floor plates. This research is limited by conducting research on port ports that are burdened with berthing loads. The results of this study are deformation at the nodes in the horizontal and vertical directions of the global and local axes. Based on the analysis carried out, a maximum horizontal deformation of 4.363 cm is obtained and is less than 0.5% H (or 7.4 cm) as required in SNI 8460:2017. Thus, it can be concluded that the structure can still bear the impact of a ship weighing 30,000 DWT.
Review Kapasitas Daya Dukung Dan Tinjauan Waktu Pelaksanaan Bore Pile Pada Pembangunan Jembatan Jalan Bebas Hambatan Binjai Pangkalan Brandan Yetty Saragi; Humisar Pasaribu; Tiurma Saragi; Johan Oberlyn Simanjuntak; Bartholomeus Hutagalung; Salomo Simanjuntak
SPROCKET JOURNAL OF MECHANICAL ENGINEERING Vol 5 No 1 (2023): Edisi Agustus 2023
Publisher : Program Studi Teknik Mesin, Universitas HKBP Nommensen, Medan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36655/sprocket.v5i1.1225

Abstract

In the Sei Wampu Bridge work project, Binjai Pangkalan Brandan carried out bore pile foundation installation work at the A2 foundation point with a total of 21 piles. Review of the bearing capacity of bore pile foundations using Analysis from Meyerhof (1956) and the Converse-Labarre Formula method for the calculation of pile group efficiency. The time of completion of work based on the time schedule plan is 125 calendar days. This research conducted a review using the Critical Chain Project Management (CCPM) method to obtain time efficiency, so that the project can be carried out on time. From the results of analysis and discussion, it was obtained that the largest foundation carrying capacity was the result of laboratory data using method C. Significant differences in results were obtained, especially laboratory data due to the correlation value used in each method. The result of calculating the bearing capacity of the foundation based on the method of Luciano Decourt (1987) using N-SPT data is 287,600.76 kN; Meyerhof's (1956) method using N-SPT data is 265,062.68 kN; a combination of Meyerhof's method (1976), Vesic's method (1977); the combination of the Vesic method (1977), the Coyle and Castello method (1981) and the results of foundation carrying capacity analysis using the All Pile program is 41,159.85 kN. The Critical Chain Project Management method is defined as the longest chain of interrelated events, where the linkage lies in the work or resources that are interconnected with each other, by cutting 50% of the duration of the work and replacing it as a buffer. The time comparison obtained from the calculation results using the CCPM method obtained a time efficiency of 116 days with a work time difference of 7.2% or about 9 days from the existing duration of the previous 125 days, while to compare the results of the CCPM method, calculations were carried out based on realization for 97 days, where the realization results were smaller than using the CCPM method and time schedule plan. Keywords : Bore pile, Carrying capacity, Time review
Co-Authors Arnita Silaban Astri Agnes Humisar Pasaribu Humisar Pasaribu Johan Oberlyn Simanjuntak Johan Oberlyn Simanjuntak Lumbangaol, Partahi Rizky M. Buulolo Salomo Simanjuntak Salomo Simanjuntak Tiurma Saragi Yetty Riris Saragi Yetty Saragi