Article Per Year (5 Year)
p-Index From 2021 - 2026
3.61
P-Index
This Author published in this journals
All Journal JeLAST : Jurnal Teknik Kelautan , PWK , Sipil, dan Tambang Jurnal Teknik Sipil Journal of Innovation and Technology Indonesian Journal of Multidisciplinary Science Jurnal Teknik Sipil Institut Teknologi Padang Civil Engineering Scientific Journal Kohesi: Jurnal Sains dan Teknologi Serambi Engineering
Vivi Bachtiar
Unknown Affiliation
Humanities Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Decision Sciences, Operations Research & Management Earth & Planetary Sciences Economics, Econometrics & Finance Education Electrical & Electronics Engineering Energy Engineering Environmental Science Industrial & Manufacturing Engineering Languange, Linguistic, Communication & Media Law, Crime, Criminology & Criminal Justice Library & Information Science Mathematics Mechanical Engineering Public Health Social Sciences Transportation Other

Published : 42 Documents Claim Missing Document
Claim Missing Document
Check
Articles

Found 42 Documents
Search

 1   2   3   4   5 
Application of Finite Difference Method in Simulating 2D Partial Dam-break Flow with an Obstacle Hafiyyan, Qalbi; Nirmala, Azwa; MS, Murad; Sumiyattinah, Sumiyattinah; Bachtiar, Vivi; Yusuf, Muhammad Yusuf
Indonesian Journal of Multidisciplinary Science Vol. 2 No. 12 (2023): Indonesian Journal of Multidisciplinary Science
Publisher : International Journal Labs

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55324/ijoms.v2i12.609

Abstract

A numerical model capable of simulating the dam-break flow is required to reduce the detrimental impact on the downstream area of the dam. This study aims to see how the characteristics and patterns of flow due to partial dam failure and the presence of an obstacle in the floodplain. In real life, the obstacle can be considered as a building. In this research, a model based on the FTCS method was developed with the addition of a Hansen numerical filter. This model is known as the FTCS-Hansen model. The Hansen filter in this study is used to enhance the numerical of the model and reduce oscillations due to shock waves. The FTCS-Hansen model simulates a 2D partial dam break with an obstacle. The simulation results are compared with other simulation results from previous studies. This comparison intends to see the performance of the FTCS-Hansen model. The results show good agreement between the FTCS-Hansen model and other numerical models. In addition, the complicated dam-break flow characteristics due to the presence of an obstacle (reflection and diffraction) can also be well captured by the FTCS-Hansen model.
OVERVIEW OF THE BEARING CAPACITY FINNED CONCRETE SLABS BASED ON SLOPE OF THE FINS USING NUMERICAL METHOD Mandagi, Nashril Ananta; Yusuf, Muhammad; Bachtiar, Vivi
Jurnal Teknik Sipil Vol 23, No 4 (2023): JURNAL TEKNIK SIPIL EDISI NOVEMBER 2023
Publisher : Fakultas Teknik Universitas Tanjungpura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26418/jts.v23i4.66959

Abstract

Indonesia is a country that has a land area of approximately 1.905 million km ². Facilities and infrastructure are needed to support community mobility to balance the land area. One of the infrastructures needed to carry out this mobilization is roads. In building roads, it is necessary to pay attention to safety and comfort aspects so the community can optimally use these facilities. Experts have contributed much of their thoughts to create a road construction used today. Concrete Structure is a common structure used by experts for road construction in Indonesia. Concrete construction was chosen because it is easy to form and stiff so it is easy to adapt to regions in Indonesia. However, road damage still occurs frequently, so a more effective construction system is needed to reduce road damage. In the previous study (Sirait et al., 2022; Syenna et al., 2022), experimental research was carried out in the form of finned concrete slab construction which functions to increase the bearing capacity of the concrete slab. Variations on the tilt of the fins are used, namely 0 °, 10 °, 20 °, 30 °, and 40 °. This study found that concrete slabs with a fin slope of 30 ° produced the greatest carrying capacity of the other sample models. This research is still reviewing the same aspect, namely finding the optimal fin slope on concrete slab samples with variations of fin slope of 0 °, 10 °, 20 °, 30 °, and 40 °. However, the method used is a numerical method by making approximations to the original conditions of the samples. Simulating loading tests on cohesive soils and non-cohesive soils carried out samples. By this numerical method, it was found that concrete slabs with a fin slope of 10 ° had the highest bearing capacity of the other samples.  
ANALISA KUAT GESER TANAH DI BAWAH PENGARUH MEDAN LISTRIK DENGAN UJI GESER KIPAS (VANE SHEAR TEST) LAPANGAN Lafiana, Restya; Rustamaji, -; Bachtiar, Vivi
Jurnal Teknik Sipil Vol 19, No 2 (2019): JURNAL TEKNIK SIPIL EDISI DESEMBER 2019
Publisher : Fakultas Teknik Universitas Tanjungpura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26418/jtst.v19i2.44021

Abstract

Perbaikan tanah dengan kadar air tinggi dapat dilakukan dengan cara mengurangi kandungan airnya sehingga dapat meningkatkan kuat geser dan daya dukung tanah tersebut. Metode elektrokinetik merupakan alternatif perbaikan tanah yang tepat dengan memanfaatkan proses elektrolisis pada elektroda dimana air di dalam tanah akan mengalir dari anoda ke katoda yang disebut fenomena elektroosmosis. Tujuan penelitian ini adalah menentukan pengaruh penggunaan elektroosmosis terhadap kuat geser tanah lempung. Penelitian ini menggunakan model fisik skala lapangan yang diberi perlakuan elektrokinetik dan diuji kuat geser dengan vane shear test. Penelitian ini menggunakan arus listrik searah   (DC) dengan variasi arus 640, 1280, dan 2560 mA waktu tunggu yang sama (7 hari) dan variasi waktu tunggu 15, 21, 28, dan   35 hari dengan arus yang sama                (320 mA). Berdasarkan hasil pengujian di lapangan diperoleh kesimpulan bahwa penggunaan elektroosmosis pada tanah lempung mampu menaikkan kuat geser undrained (cu). Kuat geser undrained mengalami kenaikan sebesar 15,29-81,69% untuk pemberian variasi arus dan   8,43% -142,61% untuk pemberian variasi waktu tunggu. Lamanya waktu tunggu mengalirkan arus memberikan hasil kuat geser undrained (cu) yang lebih besar dibandingkan pemberian arus yang lebih besar. Semakin lama waktu tunggu pengaliran arus, semakin besar juga kuat geser undrained.
UTILIZATION OF SPENT BLEACHING EARTH WASTE ON LIME-SOIL STABILIZATION FOR ROAD BODY FOUNDATION LAYER BASED ON SOIL MECHANICAL Zanjabil, Ananda Anggiat; Priadi, Eka; Bachtiar, Vivi
Jurnal Teknik Sipil Vol 23, No 3 (2023): JURNAL TEKNIK SIPIL EDISI AGUSTUS 2023
Publisher : Fakultas Teknik Universitas Tanjungpura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26418/jts.v23i3.65881

Abstract

Soil stabilization is mixing soil with specific materials to improve the soil's technical attributes to meet specific technical requirements, such as increasing its stability. One stabilization method is chemical stabilization, which utilizes mixing heaped soil using lime and Spent Bleaching Earth (SBE). This research is focused on the effect of mixing lime with SBE for soil stabilization with maintenance time between 0, 7, and 14 days. The amount of lime used in the research is 4% from the soil dry weight with variations of the SBE mixture of 5%, 10%, 15%, and 20%. The conclusion obtained in this study was that adding SBE could increase the maximum dry density up to a percentage of 10%. Using SBE of more than 10% reduces the maximum dry density value but increases the optimum moisture content. From the mechanical attributes testing carried out, it can be seen that a percentage of 10% can increase the results of mechanical testing, while an increment above 10% will reduce the mechanical results. Based on the CBR and UCS test results, we found that lime and SBE mixture can pass the attributes limit for a grade S aggregate foundation layer and full-fill the requirement as a road body foundation layer. So, it can be concluded that lime and SBE mixture can be used as a road body foundation layer but has not reached the target for road foundation layers and requires maintenance for some time.
STUDY ON THE EFFECTS OF SOIL-CEMENT STABILIZATION IN THE LOWER ROAD FOUNDATION LAYER USING SPENT BLEACHING EARTH STABILIZER IN TERMS OF SOIL PHYSICAL PROPERTIES Hafiz, Idham; Bachtiar, Vivi; Rustamaji, R. M.
Jurnal Teknik Sipil Vol 23, No 3 (2023): JURNAL TEKNIK SIPIL EDISI AGUSTUS 2023
Publisher : Fakultas Teknik Universitas Tanjungpura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26418/jts.v23i3.65918

Abstract

In road construction planning, soil plays a primary role that will be examined. In geotechnical engineering, soil stabilization is one of the engineering sciences and efforts to enhance soil characteristics. Unbeknownst to many, ideas and concepts are generated to create new innovative materials that can replace or supplement existing materials. Based on this, the concept of utilizing spent bleaching earth (SBE) waste material emerged. With the advancement of engineering knowledge, particularly in the field of geotechnical engineering, soil stabilization is employed as an effort to improve soil characteristics. By utilizing SBE and cement as materials for soil stabilization in dams, the changes in the physical properties of the embankment soil before and after stabilization are examined. The physical property results are obtained through testing. Each obtained result is compared against the lower road foundation layer specifications based on the General Specifications for Road and Bridge Construction Works 2018 (Revision 2). Based on the testing and analysis, the plasticity index value with an optimum content of 10% and a curing time of 14 days, which is 7.576%, has met the requirements for constructing Class B roads' lower road foundation layer.
STUDY OF WAVE DOMINANT DIRECTIONS ON SEDIMENT TRANSPORT IN THE ESTUARY OF KAPUAS RIVER, PONTIANAK, WEST KALIMANTAN Budiman, Farid; Danial, Mochammad Meddy; Meirany, Jasisca; Lestari, Arfena Deah; Bachtiar, Vivi
Jurnal Teknik Sipil Vol 23, No 1 (2023): JURNAL TEKNIK SIPIL EDISI FEBRUARI 2023
Publisher : Fakultas Teknik Universitas Tanjungpura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26418/jtst.v23i1.57917

Abstract

The Kapuas River is a very important water transportation route in West Kalimantan, crossing 5 districts and 1 city. The problem that occurs in the shipping lane on the Kapuas River is the accumulation of severe sediment at the mouth of the estuary. This becomes an obstacle for ships with large loads to sail, for this reason, this research was carried out. The purpose of this study was to determine the dominant direction of waves and sediment transport. This study was calculated using the CERC (Coastal Engineering Research Centre) method and using secondary data. It was found that the dominant wave direction came from the North (N) direction with an incidence percentage of 22.496%. Percentage of occurrence from the Northwest (NW) direction is 12.145%, from the West (W) direction is 6.253%, and from the Southwest direction (SW) is 11.724%. While the amount of sediment transport from the Northwest is -393062.1306 m3/year with the characteristics of the sediment being clay, from the West it is -250.1672 m3/year with the sediment characteristics being silty clay and from the Southwest, it is 579090.2782 m3/year with sediment characteristics of silty clay. The results of the sediment calculation have negative results which indicate that there is no sediment transport from the Northwest and West, but the sediment is deposited. For this reason, it is necessary to carry out appropriate handling of these problems to reduce sediment build-up in the study area.
REVIEW OF BEARING CAPACITY OF FINNED CONCRETE SLABS BASED ON THE NUMERICAL VARIATION OF LENGTH Amal, Tansa Ihwanul; Bachtiar, Vivi; Yusuf, Muhammad
Jurnal Teknik Sipil Vol 23, No 3 (2023): JURNAL TEKNIK SIPIL EDISI AGUSTUS 2023
Publisher : Fakultas Teknik Universitas Tanjungpura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26418/jts.v23i3.66798

Abstract

In general, Pontianak and the surrounding area have soft soil characteristics with a low carrying capacity compared to other soil types. This condition is the leading cause of several construction failures, especially in constructing transportation or road facilities and infrastructure. One form of construction failure is the state of the road, which has experienced cracks and bumps in a relatively short time after the construction of the road. Innovations in road pavement construction are needed to overcome these conditions. This research aims to obtain the carrying capacity of reinforced concrete road pavement construction with fins by being given a layer of sand on cohesive and non-cohesive soils. This research was carried out by testing numerically through plate modelling with the PLAXIS 3D application and unique software in reviewing the modelling structure. In this study, the effect of fin length at a slope of 30 ° on increasing the ultimate load of slabs on cohesive and non-cohesive soils was investigated using the Elastic-Plastic method and with a computer program, which was then plotted into a graph of the relationship between load versus settlement and a diagram of the relationship between ultimate load vs. fin length. Based on the computer program output results, the five models' most significant soil maximum load (Pu) is 22.5 kN in the 40 cm fin length modelling. Even though they have different parameters, the two soils show the same results and behaviour. These results show that the most optimal modelling in this study is on a 40 cm long finned concrete slab because the soil carrying capacity is higher than other models.
PEMETAAN KONSISTENSI TANAH DENGAN METODE SONDIR DI KOTA SINGKAWANG Prasetyo, Dwi; Rustamaji, R.M.; Bachtiar, Vivi
Jurnal Teknik Sipil Vol 19, No 2 (2019): JURNAL TEKNIK SIPIL EDISI DESEMBER 2019
Publisher : Fakultas Teknik Universitas Tanjungpura

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1137.331 KB) | DOI: 10.26418/jtst.v19i2.40836

Abstract

Penyelidikan tentang karakteristik tanah merupakan suatu pekerjaan pendahuluan yang sangat penting pada pelaksanaan suatu kontruksi. Informasi yang cukup harus diperoleh untuk dasar pengambilan suatu keputusan dalam membuat suatu desain yang aman, ekonomis dan tidak mendapat banyak kendala pada saat pelaksanaan kontruksi. Penulisan ini terhadap data sondir yang ada di Kota Singkawang, dimana dari data ini akan di cari konsistensi jenis tanah yang di wakili oleh parameter-parameter yang di dapat dari data sondir. Skripsi ini menyajikan hasil analisa data sondir untuk mengetahui kondisi tanah di Kota Singkawang kemudian mendeskripsikan penyebaran konsistensi tanah yang ada di Kota Singkawang. Kota Singkawang maka di deskripsikan Kecamatan Singkawang Barat pada kedalaman 0 "“ 6 adalah berkossistensi tanah sangat lunak dan pada kedalaman 8 "“ 20 meter berkonsistensi tanah kaku dan keras. Kecamatan Singkawang Selatan pada kedalaman 0 "“ 2 adalah tanah lunak dan pada kedalaman 4 "“ 20 meter berkonsistensi keras. Kecamatan Singkawang Tengah pada kedalaman 0 "“ 6 adalah tanah sangat lunak dan pada kedalaman 8 "“ 20 meter berkonsistensi keras. Jenis tanah di Kota Singkawang adalah Silt/loam, Clay, Heavy Clay dan Peat.
PENGARUH PENAMBAHAN DIFA SOIL STABILIZER PADA LAPISAN FONDASI JALAN YANG DISTABILISASI MENGGUNAKAN SEMEN (SOIL – CEMENT STABILIZATION) (TINJAUAN TERHADAP NILAI BATAS-BATAS ATTERBERG TANAH) Alyani, Alifa Innasa; Bachtiar, Vivi; Priadi, Eka
Kohesi: Jurnal Sains dan Teknologi Vol. 7 No. 10 (2025): Kohesi: Jurnal Sains dan Teknologi
Publisher : CV SWA Anugerah

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

Abstract

Stabilisasi tanah menggunakan semen merupakan salah satu upaya yang dapat dilakukan untuk memperbaiki daya dukung suatu struktur lapisan perkerasan yang berdiri di atasnya. Namun, efektivitas stabilisasi sering dipengaruhi oleh suatu karakteristik plastisitas tanah, sehingga diperlukannya bahan tambahan yang mampu memperbaiki sifat indeks plastisitas tanah. Tujuan dari penelitian ini yaitu untuk menganalisis pengaruh penambahan DIFA Soil Stabilizer sebesar 2%, 6%, dan 12% terhadap perubahan nilai Batas-batas Atterberg pada tanah yang distabilisasi menggunakan semen 7% dengan waktu pemeraman (curing time) 0, 7, dan 14 hari. Hasil dari penelitian menunjukkan bahwa kombinasi semen dan DIFA Soil Stabilizer menurunkan nilai batas cair (LL) menjadi 40,753%, nilai batas plastis meningkat menjadi 33,418%, nilai batas susut menurun menjadi 18,429%, serta nilai indeks plastisitas turun menjadi 7,335%, sehingga tanah memenuhi persyaratan sebagai material subgrade kelas B. Kata kunci: Stabilisasi tanah, DIFA Soil Stabilizer, Batas-batas Atterberg, Semen. Abstract Soil stabilization using cement is one way to improve the bearing capacity of a pavement structure. However, the effectiveness of stabilization is often influenced by the soil's plasticity characteristics, necessitating additional materials that can improve the soil's plasticity index. The purpose of this study was to analyze the effect of adding 2%, 6%, and 12% DIFA Soil Stabilizer on changes in the Atterberg Limits of soil stabilized using 7% cement with curing times of 0, 7, and 14 days. The results showed that the combination of cement and DIFA Soil Stabilizer reduced the liquid limit (LL) to 40.753%, the plastic limit increased to 33.418%, the shrinkage limit decreased to 18.429%, and the plasticity index decreased to 7.335%. Therefore, the soil met the requirements for class B subgrade material. Keywords: Soil stabilization, DIFA Soil Stabilizer, Atterberg Limits, Cement.
Studi Numerik Tentang Kondisi Ekstrem Pelat Beton Bersirip di Atas Tanah Pasir Fadilah, Hafizd Nur; M. Yusuf; Bachtiar, Vivi
Jurnal Teknik Sipil Institut Teknologi Padang Vol 13 No 1 (2026): Jurnal Teknik Sipil Institut Teknologi Padang
Publisher : ITP Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21063/jts.2026.V1301.084-90

Abstract

Jalan merupakan salah satu prasarana transportasi darat yang paling banyak digunakan oleh masyarakat serta memiliki peranan penting dalam sistem transportasi untuk mendukung mobilisasi barang dan kendaraan. Pembangunan jalan dengan perkerasan beton (perkerasan kaku) kini semakin banyak diterapkan karena memiliki ketahanan yang tinggi. Namun, pembangunan jalan di atas lahan berpasir rentan mengalami kegagalan struktur akibat daya dukung tanah yang rendah, yang dapat menyebabkan deformasi, retakan, hingga patahnya struktur jalan. Posisi pembebanan pada pelat akan mempengaruhi deformasi yang terjadi pada pelat, untuk itu perlu dilakukan pengujian untuk mengetahui pada posisi pembebanan pada bagian manakah kondisi paling ekstrem pada pelat beton bersirip berada. Penelitian ini bertujuan untuk menganalisis pengaruh variasi posisi beban pada pelat beton bersirip terhadap besarnya beban dan deformasi maksimum yang terjadi pada pelat, serta mengidentifikasi posisi pembebanan yang paling ekstrem. Analisis dilakukan secara numerik menggunakan perangkat lunak PLAXIS 3D V.22 dengan model pelat beton bersirip yang memiliki kemiringan sirip 30°. Pembebanan diberikan pada titik tengah serta tiga titik tepi pelat. Berdasarkan analisis yang dilakukan hasil nilai Pu dibandingkan dengan posisi pembebanan pada titik tengah, posisi pembebanan pada titik sudut terjadi penurunan Pu sebesar 61,5%, pada tengah-tengah sisi tak bersirip terjadi pengurangan nilai Pu sebesar 38% dan untuk titik tengah-tengah sisi bersirip terjadi penurunan nilai Pu sebesar 24,6%. Berdasarkan hasil nilai Pu diketahui bahwa posisi pembeban pada sudut pelat merupakan posisi paling ekstrem. Posisi pembebanan pada sudut pelat juga menghasilkan nilai deformasi paling besar ketika keempat posisi pembebanan diberikan beban yang sama, sebesar 47,68 mm pada beban 25 kN. Hasil ini menunjukkan bahwa variasi posisi beban berpengaruh signifikan terhadap respons deformasi pelat beton bersirip di atas tanah pasir.
Co-Authors , MTS, Johnny - Harnita - Jumadi Abubakar Alwi Al Anshori, Rifki Alam, Hafidz Al Alyani, Alifa Innasa Amal, Tansa Ihwanul Aprha Syenna Aprianto . Aprianto Aprianto Ardhana, Praditya ARIF KURNIAWAN Arpina, Maria Azami, Fikri Irfanil Azwa Nirmala Catherine, Liany Ayu Dwi Prasetyo Edo Herwanda Eka Priadi Eka, Priadi Elsa Tri Mukti Fadilah, Hafizd Nur Farid Budiman Fendy Oktavianto Hafiyyan, Qalbi Hafiz, Idham Helmi ., Helmi Hendra Wijaya Istanto, Roviandito Cahaya Setia Johnny MT.S Khrisna Catur Wibawa Lafiana, Restya Lestari, Arfena Deah Luckianto, Marvin M Yusuf M Yusuf M. Yusuf M. Yusuf Mandagi, Nashril Ananta Meirany, Jasisca Mochammad Meddy Danial MS, Murad Muhammad Nur Ilham MUHAMMAD YUSUF Muhammad Yusuf Putri, Nurul Aulia R M Rustamaji R. M. Rustamaji R. M. Rustamaji, R. M. Ridho, Abdul Haris Rustamaji, - Rustamaji, R.M Rustamaji, R.M. Sahabung, Elvinanda Putra Samuel Maruli Sirait Saputra, Nanda Zulna Setiawan, Marius Simamora, Roberton Siregar, Novita Januarti Siregar Sutrisno Wicaksono Sim Tri Nugroho Darmawan Wibby Dwi Anggoro Yusuf, Muhammad Yusuf Zanjabil, Ananda Anggiat