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

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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 KEBUTUHAN AIR BERSIH DI KOTA MEDAN SUMATERA UTARA Simanjuntak, Salomo; Zai, Eben Oktavianus; Tampubolon, Michael Halomoan
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 (597.377 KB)

The water that humans really need is good quality water, which is commonly known as clean water. Clean water is one type of water-based resource that is of good quality and is commonly used by humans for consumption or in carrying out their daily activities including sanitation. The most important thing is clean water is a basic human need which greatly affects human health. The stages in completing this Final Project are first to collect the required data from the Central Bureau of Statistics and BAPPEDA Medan City with literature reviews and ask questions directly to related parties about the required data. Then the calculation of the projected population in the city of Medan using the geometric, arithmetic method. The next stage is calculating the need for clean water in Medan City and calculating the maximum daily water needs and peak hours.

Beton Bermutu Dan Ramah Lingkungan Dengan Memanfaatkan Limbah Abu Ban Bekas Simanjuntak, Johan Oberlyn; Saragi, Tiurma Elita; Sidabutar, Ros Anita; Pasaribu, Humisar; Simbolon, Rido Parulian
Jurnal Visi Eksakta Vol. 2 No. 2 (2021): Jurnal Visi Eksakta : Edisi Juli
Publisher : LPPM Universitas HKBP Nommensen

The need for housing is increasing day by day. This is a factor in the visit to the need for concrete as a housing construction material. The more concrete that is produced, the more cement is needed for the construction. Concrete is a composite material (mixture) of several materials, the main ingredient of which consists of a mixture of cement, fine aggregate, coarse aggregate and water. Utilization of waste tire ash in the concrete mix is one of the alternative uses so that ic can ultimately increase the efficiency of cement savings which takes a long time to increase in high prices. With reference to this, this study uses used waste as a cement additive with a mixture composition of 0%, 3%, 6% and 9%. The test specimens were made using a cylinder with a diameter of 15 cm and a height of 40 cm with 48 specimens produced. The results of the compressive strength test of normal concrete (25.45 MPa), while the concrete with a mixture of 3% used tire ash (28.15 MPa), 6% used tire ash mixture (23.46 MPa) and 9% used tire ash mixture (18.60 MPa). From this research, it can be said that compressive strength of concrete using 3% ash produces the greatest compressive strength of 28.15 MPa.

ANALISA KEBUTUHAN AIR BERSIH DI KOTA MEDAN SUMATERA UTARA Salomo Simanjuntak; Eben Oktavianus Zai; Michael Halomoan Tampubolon
Jurnal Visi Eksakta Vol. 2 No. 2 (2021): Jurnal Visi Eksakta : Edisi Juli
Publisher : LPPM Universitas HKBP Nommensen

The water that humans really need is good quality water, which is commonly known as clean water. Clean water is one type of water-based resource that is of good quality and is commonly used by humans for consumption or in carrying out their daily activities including sanitation. The most important thing is clean water is a basic human need which greatly affects human health. The stages in completing this Final Project are first to collect the required data from the Central Bureau of Statistics and BAPPEDA Medan City with literature reviews and ask questions directly to related parties about the required data. Then the calculation of the projected population in the city of Medan using the geometric, arithmetic method. The next stage is calculating the need for clean water in Medan City and calculating the maximum daily water needs and peak hours.

ANALISA KONTRAK PROYEK KONSTRUKSI DI INDONESIA Simanjuntak, Johan Oberlyn; Bartholomeus; Simanjuntak, Salomo; Lumbangaol, Partahi; Astri Agnes
Jurnal Visi Eksakta Vol. 2 No. 2 (2021): Jurnal Visi Eksakta : Edisi Juli
Publisher : LPPM Universitas HKBP Nommensen

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 PERKERASAN JALAN KAKU (RIGID PAVEMENT) PADA JALAN SM RAJA MEDAN DENGAN METODE BINA MARGA Sidabutar, Ros Anita; Saragi, Yetty Riris; Pasaribu, Humisar; Pardede, Maruli; Hutabarat, Torang
Jurnal Visi Eksakta Vol. 2 No. 2 (2021): Jurnal Visi Eksakta : Edisi Juli
Publisher : LPPM Universitas HKBP Nommensen

axle vehicles with the aim of shortening the distance and travel time from one place to another, as well as an infrastruture that is needed to support development. The design of the Sisingamangaraja – Lubuk Pakam road pavement consisting of a cement concrete slab as a foundation layer and a foundation laver above the subgrade. The purpose of this study was to evaluate the thickness of the pavement using the Highways Method. The research method used is the secondary data collection method. The data collected include traffic data, concrete data, soil data, vehicle axle free data, CBR modulus of subgrade. Plaanning the thickness of the road pavement concrete slab using the Highways Method obtained 300 mm. A planner is expected to have “felling engineering” supported by extensice knowledge and experience gained in the field.

PEMILIHAN ALTERNATIF SUMBER AIR BAKU DI KABUPATEN KARO Simanjuntak, Salomo; Saragi, Yetty Riris; Simanjuntak, Johan Oberlyn; Pasaribu, Humisar; Sianipar, Ricki A H
Jurnal Visi Eksakta Vol. 2 No. 2 (2021): Jurnal Visi Eksakta : Edisi Juli
Publisher : LPPM Universitas HKBP Nommensen

Clean water is a primary need for humans in every country. The availability of clean water must be guaranteed in time, quantity and quality. The need for water for both domestic and non-domestic needs continues to increase from year to year. To meet the needs of clean water, the people of Karo Regency need clean water sources that are suitable for drinking. Water resources are water discharge and population for water distribution. In finding the amount of water demand, an analysis of the population and analysis of clean water production is carried out. Determining the need for clean water and the population in Karo Regency uses the Geometry method which this method shows the largest population growth so that it can be planned for clean water needs until 2027. Based on the results of the projected population plus the number of water needs in 2027 as many as 491,444 people, the required water discharge is 907,799 l/s while the current production capacity is 14,744.831 l/s, so the additional capacity needed is 0.01003 m3/s. Implementation in the construction of clean water facilities must be adjusted to the level of social, cultural, and economic conditions of the community.

SIFAT DAN KARAKTERISTIK CAMPURAN BETON MENGGUNAKAN BATU PECAH DAN BATU GULI DARI SUNGAI BINJAI Simanjuntak, Johan Oberlyn; Sidabutar, Ros Anita; Pasaribu, Humisar; Saragi, Yetty Riris R; Sitorus, Sriyanti
Jurnal Visi Eksakta Vol. 2 No. 2 (2021): Jurnal Visi Eksakta : Edisi Juli
Publisher : LPPM Universitas HKBP Nommensen

Concrete is a construction material consisting of a mixture of cement, aggregate, water and with or without admixture if needed. Coarse aggregate and fine aggregate serve as the main filler of concrete as well as reinforcement, while the cement and water mixtured serves as a binder between materials. To find out and study the behavior of each of these concrete constituents, it is necessary to know the characteristics of the materials made as constituents of the concrete. This study was conducted with the aim of comparing the most optimum type of coarse aggregate used and the comparison of the use of cement for coarse aggregate of crushed stone and coarse aggregate of gully originating from North Sumatera area, namely from the Wampu River in Binjai City as a concrete mixture to see its effect on compressive strength of concrete at the same concrete characteristics namely f’c 25 MPa. The results of the normal concrete mix design are obtained by using coarse aggregate of crushed stone and coarse aggregate of boulder in different amounts of cement. The coarse aggregate of crushed stone requires more cement with the amount of cement 411.1 kg/m3 than the coarse aggregate of gum with the amount of cement 388.9 kg/cm3.

Tingkat Penerapan Keselamatan, Kesehatan Kerja dan Lingkungan (K3l) Pada Proyek Konstruksi Simanjuntak, Johan Oberlyn; Lumbangaol , Partahi; Simanjuntak, Salomo; Pasaribu, Humisar; Simanungkalit, Okto
Jurnal Visi Eksakta Vol. 3 No. 1 (2022): Jurnal Visi Eksakta : Edisi Januari
Publisher : LPPM Universitas HKBP Nommensen

Increased development in various regions in Indonesia, especially in the city of Medan, makes many contactors compete with each other in implementing a project. Starting from the time, quality, and cost. However, there are still many contractors who ignore Occupational Safety, Health and Environment (K3L). This study aims to determine the level of application of Occupational Safety, Health and Environment (K3L) in construction projects. Occupational Health, Safety and Environment (K3L) is a program that aims to create a safe, healthy workplace. So that it can reduce the risk of work accidents and occupational diseases as low as possible on the project. The theory used in this study uses quantitative methods that tend to produce descriptive results. The sampling technique was carried out by observation and questionnaire. The instrument used comes from the Minister of Public Works Regulation No. 9 of 2008. This research was conducted on the Cinema Grand Jati Junction construction project located on Jln Perintis Kemerdekaan, Medan The results of the research on the level of application of Occupational Safety, Health, and Environment (K3L) for the Cinema Grand Jati Junction construction project on Jln Perintis Kemerdekaan, Medan amounted to 90.54%. The completeness of K3L facilities in the project was 86.7%.

Pengaruh Berpikir Induktif Dalam Pembelajaran Getaran dan Gelombang Dikelas VIII SMPN Bosar Galugur Kecamatan Tanah Jawa Surbakti, Mariana; Nainggolan, Irawati Kristin M.; Sitorus, Parlindungan
Jurnal Visi Eksakta Vol. 3 No. 1 (2022): Jurnal Visi Eksakta : Edisi Januari
Publisher : LPPM Universitas HKBP Nommensen

This research aims to find out the influence of inductive thinking learning models in physics learning on Vibration and Wave Material of Grade VIII in SMPN Bosar Galugur Village, Tanah Jawa Sub-District. This type of research is a "true" experimental research with a research population that is all grade VIII junior high students in Bosar Galugur Village, Tanah Jawa Sub-District. With the Cluster Random Sampling technique, it is considered a research sample of experimental classes (13 students) and control classes (12 students). The instruments used are student results tests with multiple selection forms that have been performed through validation tests as well as student activity observation sheets. The results of the data analysis were an average score of 61.92 experiment class post-test with a standard deviation of 10.11 and an average post-test control class score of 41.66 with a standard deviation of 12.49. The hypothesis of this study was tested with a one-party t test for experiment class post test data and control classes for α=0.05 and dk=23 obtained thitung =4.48 and ttabel =1.71, with thitung>ttabel then Ha accepted and H0 rejected. Thus it can be concluded based on the above calculation results that there is a significant influence of inductive thinking learning model in physics learning on Vibration and Wave Material Grade VIII in Bosar Galugur Village of Tanah Jawa Sub-district.

Home Page

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Contact Name
Widia Sianturi

Contact Email
widia.sianturi06@gmail.com

Phone
+6285211304551

Journal Mail Official
visieksakta@uhn.ac.id

Editorial Address
Jalan Sutomo No 4 A Medan

Location
Kota medan,

Sumatera utara

INDONESIA

Abstract

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Home Page

OAI Link

Editorial Team

Contact

Reviewer

Google Scholar

Contact Name Widia Sianturi

Contact Email widia.sianturi06@gmail.com

Phone +6285211304551

Journal Mail Official visieksakta@uhn.ac.id

Editorial Address Jalan Sutomo No 4 A Medan

Location Kota medan, Sumatera utara INDONESIA

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Contact Name
Widia Sianturi

Contact Email
widia.sianturi06@gmail.com

Phone
+6285211304551

Journal Mail Official
visieksakta@uhn.ac.id

Editorial Address
Jalan Sutomo No 4 A Medan

Location
Kota medan,

Sumatera utara

INDONESIA