Article Per Year (5 Year)
p-Index From 2021 - 2026
0.882
P-Index
This Author published in this journals
All Journal Jurnal Spektran Research Report - Engineering Science IPTEK Journal of Proceedings Series Jurnal Teknik Sipil International Conference on Engineering and Technology Development (ICETD) Jurnal Deformasi Jurnal Teknik Sipil Civil Engineering Dimension Dinamisia: Jurnal Pengabdian Kepada Masyarakat Jurnal Manajemen Aset Infrastruktur dan Fasilitas Journal of the Civil Engineering Forum Jurnal Teknik Sipil
Budijanto Widjaja
Program Studi Teknik Sipil, Fakultas Teknik, Universitas Katolik Parahyangan
Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Economics, Econometrics & Finance Education Engineering Environmental Science Library & Information Science Mathematics Social Sciences Transportation Other

Published : 20 Documents Claim Missing Document
Claim Missing Document
Check
Articles

Found 20 Documents
Search

 1   2 
PERBANDINGAN DAYA DUKUNG PONDASI AKIBAT PERBEDAAN METODE KONSTRUKSI PONDASI DALAM Budijanto Widjaja; Sri Ratna Wahyuningsih
JURNAL SPEKTRAN Vol 5 No 2 (2017): Vol. 5, No. 2, Juli 2017
Publisher : Master of Civil Engineering Program Study, Faculty of Engineering, Udayana University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (851.639 KB)

Abstract

This research uses 4 types of piles as the objects, a bored pile, a continuous flight auger (CFA) pile, a full displacement pile (FDP), and a full displacement pile with an expander body, the depth for all piles is 9.5 m. The bored pile, CFA, FDP, and FPD with expander body have the following diameter: 62 cm, 45 cm, 45 cm, and 22 cm. Each pile, which has different construction method, is tested by full-scale static loading, excluding the FDP with expander body, it uses Osterberg-Cell. The research aims to know which analysis method best suits a particular kind of foundation and to compare each pile capacity. The pile capacity analysis conventionally using t-z and q-z curve gives 13%-15% higher estimation than the static loading test result. Analysis using Plaxis for FDP with expander body gives lower estimation than the Osterberg Cell test result. Keywords: Continuous flight auger, full displacement pile, t-z curve, q-z curve
ALTERNATIF PENENTUAN BATAS CAIR DAN BATAS PLASTIS DENGAN TIGA VARIASI BERAT KONUS MENGGUNAKAN METODE LEE DAN FREEMAN (2009) Budijanto Widjaja; Priscillia Sundayo
Jurnal Teknik Sipil Vol. 14 No. 1 (2016)
Publisher : Program Studi Teknik Sipil Fakultas Teknik Universitas Atma Jaya Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (247.082 KB) | DOI: 10.24002/jts.v14i1.1018

Abstract

For fine soils, the most common laboratory tests are Atterberg limits, i.e. plastic andliquid limits. This paper presents two standards for determining liquid limit: ASTM and BritishStandards. Both standards use Casagrande cup and fall cone penetrometer tests. In spite of thefact from its a dvantage and shortcoming, fall cone penetrometer tends the minimum operatormistakes comparing to Casagrande cup. Moreover, a lack for determining plastic limit using byrolling soil samples with three mm in diameter also is caused by operator error. To reduce thathuman error, Lee and Freeman recommend using fall cone penetrometer to obtain plastic andliquid limits by a combination of two distinct weight of cones. In this research, tests wereconducted using two combinations of two different weight of cones. There are 12 remoldedsamples taken from Java and Madura islands. A combination using cones with single anddouble standard weight gives a better result that a combination with single and triple standardweight. The contribution of this research at least gives an alternative way to determine plasticand liquid limits using fall cone penetrometer test. Abstrak: Untuk penyelidikan tanah geoteknik, umumnya pada tanah butir halus diujibatas-batas Atterberg yaitu berupa batas cair dan batas plastis. Makalah ini menyajikandua standar pengujian untuk batas cair yaitu standar ASTM dan British. Kedua standartersebut masing-masing menggunakan Casagrande cup dan fall cone penetrometer. Di balikkelebihan dan kekurangannya, fall cone penetrometer cenderung memberikan nilaikesalahan operator yang lebih rendah dibandingkan dengan Casagrande cup. Selain itu,dengan standar untuk menentukan batas plastis juga memiliki kekurangakuratan karenaproses penggulungan tanah dengan diameter 3 mm tergantung kepada pengalaman operator.Dengan tujuan untuk mengurangi kesalahan manusia tersebut, Lee dan Freemanmengusulkan penggunaan fall cone penetrometer test untuk menentukan batas plastisselain batas cair dengan menggunakan kombinasi dari dua berat konus yang berbeda.Di dalam penelitian ini, pengujian dilakukan dengan menggunakan dua macamkombinasi dua berat konus yang berbeda. Sampel tanah yang diuji adalah sampelremolded sebanyak 12 buah yang tersebar lokasi pengambilan sampelnya di Pulau Jawa danMadura. Hasil penelitian menunjukkan bahwa penggunaan kombinasi konus standar dankonus dengan berat dua kali berat konus standar memberikan hasil yang lebih baikdibandingkan dengan kombinasi konus standar dan konus dengan tiga kali berat konusstandar. Kontribusi penelitian ini sekurang-kurangnya memberikan alternatif lainpenentuan batas plastis dan batas cair dengan menggunakan fall cone penetrometer test.Kata kunci: batas cair, batas plastis, metode Lee dan Freeman, fall cone penetrometer,variasi konus
KAJIAN STABILITAS TITIK P21 LERENG TANGGUL PENAHAN LUMPUR SIDOARJO Budijanto Widjaja; Virda Alfionida
Jurnal Teknik Sipil Vol. 14 No. 2 (2017)
Publisher : Program Studi Teknik Sipil Fakultas Teknik Universitas Atma Jaya Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1533.01 KB) | DOI: 10.24002/jts.v14i2.1529

Abstract

Munculnya semburan lumpur panas di Porong Sidoarjo, Jawa Timur sejak tahun 2006, telah mengakibatkan tergenangnya kawasan pemukiman dan pertanian serta memiliki potensi bahwa lumpur tersebut masih tetap menyembur beberapa tahun ke depan. Sejumlah upaya telah dilakukan diantaranya dengan membuat tanggul panahan lumpur. Berdasarkan pengamatan visual yang dilakukan dilihat dari struktur luar tanggul, tanggul masih dalam keadaan yang cukup baik. Tujuan dari penelitian ini adalah untuk mengetahui faktor keamanan terhadap stabilitas lereng pada tanggul Lumpur Sidoarjo terutama pada titik P21. Faktor keamanan yang dianalisis menggunakan program komputer Plaxis. Simulasi dilakukan secara bertahap sesuai dengan urutan konstruksi timbunan yang telah direncanakan hingga saat setelah konstruksi selesai dilaksanakan. Hasil simulasi menunjukkan bahwa faktor keamanan berubah terhadap waktu dan memiliki nilai kritis pada saat konstruksi timbunan selesai dilakukan yaitu sebesar 0.99. Kemudian, faktor keamanan meningkat setelah proses konsolidasi pada tahun ke-8 yaitu 1.59. Secara umum, berdasarkan hasil simulasi ini dan asumsi yang ada, tanggul P21 berada dalam kondisi aman terhadap longsoran.
Analysis of Chloride Contaminant Transport in Tailings Storage Facility Dam (Case Study: Gold Mine in Sumatra) Pascayulinda, Devina; Widjaja, Budijanto; Wijaya, Martin
Journal of the Civil Engineering Forum Vol. 10 No. 2 (May 2024)
Publisher : Department of Civil and Environmental Engineering, Faculty of Engineering, Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/jcef.9520

Abstract

In the practice of gold mining industry, hazardous waste known as tailings is produced during the ore extraction process. These tailings are typically stored in a dam structure called a Tailings Storage Facility (TSF). The planning and construction of a TSF are critical considerations, as the failure of a TSF can have substantial environmental impacts, pose risks to human safety, and result in industrial losses. Therefore, strict control is necessary in the development of TSFs to minimize the potential negative consequences. This research focuses on the transport of contaminants within a TSF, specifically examining the concentration of chloride contaminants and conducting particle movement analysis. The study utilizes modeling through the GeoStudio SEEP/W program to simulate groundwater flow profiles and the GeoStudio CTRAN/W program to understand contaminant movement over a 100-year period. GeoStudio modeling employs 10 materials: impermeable clay soil, filter sandy soil, transition gravel rock, three mine waste types (Fine, Rockfill, and Rockfill with fine), hard rock bedrock layer, in-situ soil representing the original layer, landslide with colluvial soil, and the tailings itself. Back analysis is employed to iterate model parameters and ensure modeling accuracy against field data, including comparisons with water quality test results and readings from vibrating wire piezometer (VWP) instrumentation. The contaminant transport is influenced by advection-dispersion processes and tends to concentrate within the TSF boundary toward the dam toe over a 100-year timeframe. The analysis emphasizes the influence of advection in contaminant transport and underscores the importance of particle position relative to the groundwater level, with Particle Tracking Analysis shows significant movement within the groundwater flow area. This research provides crucial insights into the dynamics of contaminant concentration, informing better decision-making in TSF planning and management. The findings underscore the imperative of strict control measures to minimize environmental impacts and human safety risks associated with TSFs, thereby advancing knowledge in gold mining waste management.
STUDI ANGLE OF REPOSE MUD VOLCANO DI DESA NAPAN PULAU TIMOR I. R. Naikofi, Mauritius; Widjaja, Budijanto; Rahardjo, Paulus P.
Jurnal Deformasi Vol. 4 No. 2 (2019): JURNAL DEFORMASI
Publisher : Universitas PGRI Palembang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31851/deformasi.v4i2.3557

Abstract

ABSTRAKSemburan lumpur vulkanik (Mud Volcano) di pulau Timor (Desa Napan) merupakan aliran lumpur bertemperatur rendah membentuk gunung-gunung lumpur yang berhenti pada ketinggian tertentu dan tumbuhlagi pada titik yang lain. Aliran lumpur alamiah ini membawa massa material berupa tanah dan material berbutir yang terus menerus tanpa harus dipengaruhi oleh adanya aktivitas gunung berapi atau kondisi curah hujan yang tinggi. Letak semburan mud volcano yang sangat dekat dengan permukiman penduduk, memungkinkan terjadinya peristiwa bencana yang akan mengacam bangunan dan kehidupan penduduk dan berdampak juga pada area pertanian. Penelitian ini dilakukan untuk melengkapi penelitian terdahulu oleh Naikofi, dkk. (2017) mengenai sifat aliran lumpur (Mudflow) mud volcano desa Napan. Hasil penelitian angle of repose yang dibentuk oleh gunung lumpur vulkanik tersebut menunjukkan bahwa pada saat variasi kadar airmendekati atau sama dengan batas cair, yaitu pada kadar air sama dengan 27.55% diperoleh angle of repose sebesar 28.710. Penelitian ini dilakukan untuk melengkapi data terpublikasi terdahulu oleh Naikofi, dkk. (2017) mengenai sifat aliran lumpur (Mudflow) mud volcano desa Napan. Informasi ini diharapkan hasilnya mendekatistudi lumpur vulkanik yang dilakukan oleh peneliti-peneliti terdahulu.Kata Kunci : Lumpur vulkanik, gunung lumpur, angle of repose
Laboratory Study on Vallejo and Scovazzo’s Methods in Estimating the Rheology Parameters of Bentonite and Kaolinite Muds Budijanto Widjaja; Ignatius Tommy Pratama; Ian Hartono; Boby Limowa
Civil Engineering Dimension Vol. 26 No. 1 (2024): MARCH 2024
Publisher : Institute of Research and Community Outreach - Petra Christian University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.9744/ced.26.1.51-62

Abstract

The mud undrained shear strength and viscosity are the essential parameters in understanding the behavior of mudflow. One of the laboratory test methods to estimate the undrained shear strength and viscosity is Vallejo and Scovazzo’s cylinder strength meter test (CSMT) and flume channel test, respectively. This paper compares the undrained shear strength of kaolin and bentonite muds obtained from the CMST to those obtained using the fall cone and mini vane shear tests and also studies the scale effects in the flume channel test in measuring the mud viscosity at a 20o to 40o slope angles and at various liquidity indexes. The results exhibit that CMST could estimate the undrained strength of mud as low as 0.45 kN/m2 with a liquidity index of up to 5.93. Then, the reduction of the size of the flume channel by half resulted in a mud viscosity of about 2.3 times higher.
Perbandingan Profil Penurunan Muka Air untuk Akuifer Tidak Terkekang Menggunakan 3D Modflow Studi Kasus Pantai Indah Kapuk Susanto, Amalia; Widjaja, Budijanto; Wijaya, Martin
Jurnal Teknik Sipil Vol 21 No 2 (2025): Jurnal Teknik Sipil
Publisher : Universitas Kristen Maranatha

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.28932/jts.v21i2.9647

Abstract

Dewatering is required to control the flow of groundwater and to lower the position of the groundwater table during excavation. In planning the dewatering system, parameters related to the flow of water in the soil are required. One of these is the conductivity value, which can be obtained from pumping tests. The sand layer found on the ground surface, which is saturated of water, is referred to as an unconfined aquifer. In this study, conductivity analysis of unconfined aquifer was conducted in PIK2 area using 3 conventional methods which are, Thiem (1906) method and curve matching method of Boulton (1963) and Neuman (1972). Conductivity values obtained from conventional calculations are then analyzed using the help of a program based on the 3D finite difference method Modflow to obtain a pattern of groundwater level decline or can also be called a depression cone. In sandy soil in the PIK2 reclamation area, conductivity values of 5.90×10-5 m/s to 8.08×10-5 m/s were obtained Neuman's method can produce better conductivity values in unconfined aquifers, as shown by the results of the water table profile from the 3D Modflow analysis.
Negative Skin Friction Tiang Pancang pada Tanah Lempung Studi Kasus Pabrik Tesktil, Bale Endah Widjaja, Budijanto; Lestari, Anastasia Sri; Agusman, Agusman
Jurnal Teknik Sipil Vol 2 No 1 (2006): Jurnal Teknik Sipil
Publisher : Universitas Kristen Maranatha

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.28932/jts.v2i1.10359

Abstract

There were several geotechnical problems at the textile factory in Bale Endah. The main problem that arose at this factory was the settlement of the soft clay soil which resulted in deformation of the tiled floor and warping of the west wall of the factory as well as cracking and collapse of the culvert in the drainage system at the location of the center column of the factory. The soil stratification at this location was dominated by soft to stiff clay layers and a sand lens layer was also found at 9-12 m depth. Therefore, the relative subsidence was more determined by the consolidation settlement of the clay. In addition to the problem of clay settlement, another problem arises, namely the problem of negative skin friction on the pile foundation. This occurs because there is an embankment on top of the clay soil which results in additional load on the soil, so that the soil settlement becomes greater than the settlement of the pile foundation. The analysis showed that the total settlement of the clay consolidation was 35.60 cm within 12.00 years and the total settlement of the pile foundation with a column load of 16.72 tons was 10.44 cm. Due to negative blanket friction, the pile foundation used is not strong enough to withstand the working load. The location of the neutral point is at a depth of 23.25-28 m for a pile foundation length of 30 m deep.
Evaluasi Perilaku dan Viskositas Material Pasir Kelanauan pada Kondisi Terlikuifaksi dengan Menggunakan Piezocone Johan, Albert; Rahardjo, Paulus Pramono; Widjaja, Budijanto
Jurnal Teknik Sipil Vol 31 No 3 (2024): Jurnal Teknik Sipil - Edisi Desember
Publisher : Institut Teknologi Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5614/jts.2024.31.3.7

Abstract

Abstract Liquefaction is phenomenon of the loss of shear strength of saturated sandy soil. Liquefaction has become one of the primary concerns for Indonesia and the world, especially after the occurrence of liquefaction in Palu due to Palu-Donggala earthquake. Learning from the liquefaction phenomena after the Palu-Donggala earthquake event on 28 September 2018, many researchers have conducted liquefaction and flow slide study. In order to complete the study of the liquefaction phenomenon, an experimental study using shake table, chamber, and piezocone is conducted to evaluate the behaviour and viscosity of liquefied silty sand material. Based on the observation during liquefied condition, the silty sand material will experience an increase in excess pore pressure and a decrease in tip resistance. In addition, it is also known that sleeve resistance, speed of penetration of the piezocone, and zone of influence due to piezocone penetration are the main keys in determining the viscosity of the silty sand material during liquefied condition Keywords: Liquefaction, viscosity, silty sand, piezocone
Landslide Treatment in the Al-Husainiyyah Junior High School Area using Cantilever-Geofoam Wall: Penanganan Longsor di Lingkungan SMP Al-Husainiyyah dengan Menggunakan Dinding Kantilever-Geofoam Lim, Aswin; Pratama, Ignatius Tommy; Widjaja, Budijanto; Tjahjanto, Helmy Hermawan; Tjondro, Johannes Adhijoso; Wijaya, Obaja Triputera; Ginting, Bobby Minola; Setiawan, Theresita Herni; Adianto, Yohanes Lim Dwi; Hidayat, Felix; Hartieni, Patricia; William, Octavianus; Aldrianita, Tabitha; Fadhil, Imam Ahmad
Dinamisia : Jurnal Pengabdian Kepada Masyarakat Vol. 8 No. 4 (2024): Dinamisia: Jurnal Pengabdian Kepada Masyarakat
Publisher : Universitas Lancang Kuning

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31849/dinamisia.v8i4.19519

Abstract

A landslide triggered by heavy rainfall occurred in the Al-Husainiyyah Junior High School area on April 26th, 2023. The landslide damaged the nearby access roads, the existing retaining wall, and a futsal court threatening the safety of the teachers and students in conducting the learning activities that especially require open areas. Thus, this community service aims to provide a cantilever wall design with geofoam as an innovative lightweight backfill material to reinforce the slope and repair the damaged structures. Field surveying and numerical analysis were then conducted to understand the current slope and soil conditions and to analyze the stability of the slope and retaining wall. The results show that a cantilever wall with a total height of 1.8 m supported by a strauss pile row with a diameter of 0.4 m, 4 m in length, and 2.5 m in spacing could increase the stability of the slope.
Co-Authors Adinda Raditya Putri Agusman, Agusman Aldrianita, Tabitha Anastasia Sri Lestari Aswin Lim Bobby Minola Ginting Boby Limowa David Wibisono Setiabudi Enry Kam Fadhil, Imam Ahmad Felix Hidayat Hartieni, Patricia Helmy Hermawan Tjahjanto I. R. Naikofi, Mauritius Ian Hartono Ignatius A Bagus WP Ignatius Tommy Pratama Ivan Octora Johan, Albert Johannes Adhijoso Tjondro Nessiana Novita Pascayulinda, Devina Paulus P Raharjo Paulus P. Rahardjo Paulus P. Rahardjo Paulus Pramono Paulus Pramono Rahardjo Paulus Pramono Raharjo Priscillia Sundayo Priscillia Sundayo, Priscillia Shannon Hsien-Heng Lee Siska Rustiani Soerjadedi Sastraadmatja Sri Ratna Wahyuningsih Stefani Wiguna Susanto, Amalia Sylvia Herina Theresita Herni Setiawan Vienti Hapsari Virda Alfionida Virda Alfionida, Virda Wahyuning Aila Wibowo, Dzaky Mahesa Wijaya, Martin Wijaya, Obaja Triputera William, Octavianus Yohanes Lim Dwi Adianto