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Ferry Fatnanta
Universitas Riau
Agriculture, Biological Sciences & Forestry Arts Humanities Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Earth & Planetary Sciences Economics, Econometrics & Finance Education Electrical & Electronics Engineering Energy Engineering Environmental Science Industrial & Manufacturing Engineering Law, Crime, Criminology & Criminal Justice Materials Science & Nanotechnology Mechanical Engineering Nursing Physics Public Health Social Sciences Transportation Other

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PENINGKATAN KEKUATAN FRICTION FONDASI TIANG PADA TANAH LUNAK Ferry Fatnanta; Syawal Satibi
Jurnal Teknologi dan Rekayasa Sipil Vol. 3 No. 2 (2024): VOL 3 NO 2 (NOVEMBER 2024)
Publisher : Departemen Teknik Sipil, Fakultas Teknik Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31258/jtrs.3.2.20-24

Abstract

Wilayah pesisir mempunyai lapisan tanah lunak relatif tebal. Tanah ini mempunyai kadar air tinggi dan daya dukung rendah. Tanah lunak merupakan tanah yang tidak menguntungkan secara teknis untuk mendukung suatu konstruksi. Tipe fondasi yang digunakan pada tanah lunak adalah fondasi tiang. Namun penggunaan fondasi tiang tipe end-bearing pada daerah seperti itu tidak disarankan karena tidak ekonomis. Floating pile menjadi alternatif fondasi pada tanah lunak, namun gesekan antara permukaan tiang dengan tanah rendah, karena permukaan beton dan baja relative halus. Fondasi cerocok lebih sesuai untuk daerah tanah lunak, karena memiliki permukaan lebih kasar dibandingkan beton atau baja, sehingga lebih effisien dalam aplikasinya. Kekasaran permukaan fondasi merupakan factor yang berpengaruh terhadap daya dukung floating pile. Oleh sebab itu, studi ini melakukan penelitian mengenai peningkatan perkuatan fondasi tiang pada tanah lunak. Penelitian dilakukan di laboratorium Mekanika Tanah Jurusan Teknik Sipil Universitas Riau. Tanah diambil dari Sei Pakning Provinsi Riau. Fondasi tiang dibuat dalam skala laboratorium. Beban diberikan secara bertahap, 2 kg setiap tahapan sampai mencapai penurunan maksimum 2 cm. Hasil penelitian menunjukkan bahwa kekasaran berfungsi secara sempurna pada beban di bawah beban kritis, sesuai dengan tingkat kekasaran fondasi. Beban kritis tiang polos lebih rendah dibandingkan beban kritis tiang kasar penuh.
Analisis Numerik Pengaruh Efek Rangkak terhadap Respon Penurunan Fondasi Tiang Helikal HR, Bella Aprilia; Satibi, Syawal; Fatnanta, Ferry
Jurnal Rekayasa Sipil (JRS-Unand) Vol. 20 No. 3 (2024)
Publisher : Civil Engineering Departement, Andalas University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/jrs.20.3.157-166.2024

Abstract

Tanah gambut merupakan tanah dengan kadar air serta kadar organik yang tinggi. Hal ini menyebabkan tanah gambut memiliki tingkat kompresibilitas dan penurunan yang tinggi serta daya dukung yang rendah. Atas dasar permasalahan itulah, timbul alternatif untuk menggunakan tiang helikal yang dapat meningkatkan nilai daya dukung tanah gambut. ini. Selain itu, tanah akan selalu mengalami tahapan rangkak yang jika berlangsung dalam waktu lama akan memiliki nilai penurunan yang signifikan dan menjadi berbahaya jika tidak diperhitungkan dengan baik. Penelitian ini bertujuan untuk menyelidiki pengaruh parameter rangkak (creep) terhadap penurunan tanah dan pola keruntuhannya. Penelitian dilakukan dengan memodelkan tiang helikal dan tanah gambut menggunakan aplikasi PLAXIS 2D dengan menggunakan model material Soft Soil Creep dan Soft Soil. Pemodelan tersebuat dimodifikasi dengan pemberian variasi parameter indeks rangkak/creep index (Cα) yang berbeda, mulai dari Cc/30 hingga Cc/10. Hasil pemodelan dengan menggunakan parameter indeks rangkak yang berbeda menunjukkan nilai penurunan yang semakin besar seiring dengan nilai indeks rangkak yang meningkat. Efek rangkak sendiri akan terlihat jelas mulai dari simulasi konsolidasi 1 tahun hingga 10 tahun. Hal ini disimpulkan setelah membandingkan pemodelan dengan model menggunakan material Soft Soil Creep dengan Soft Soil, dimana terlihat penurunan akan terus berlangsung setelah konsolidasi 1 tahun pada material tanah Soft Soil Creep yang menggunakan parameter Cα, sementara pada material tanah Soft Soil penurunan sudah tidak berlangsung lagi setelah 1 tahun konsolidasi.
EFFECT OF ADDING WOOD POWDER ASH ON CBR VALUE IN STABILIZED HIGH PLASTICITY CLAY CEMENT AND LIME Nugroho, Soewignjo Agus; Fatnanta, Ferry; Alridho, Muhammad Faizal
ASTONJADRO Vol. 10 No. 2 (2021): ASTONJADRO
Publisher : Universitas Ibn Khaldun Bogor

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32832/astonjadro.v10i2.5235

Abstract

Cement and lime are widely used as stabilizing agents for soft clays. Some pozzolanic materials have also been used as additives such as asphalt, geosta, fly ash (geopolymer), base ash, salt. Industrial waste such as rice husk ash, coal burning ash (geopolymer) is also used as an alternative for stabilization materials. This research aims to study the effect of sawdust ash, as wood waste, to replace cement and lime on the stabilization of high plasticity clay. The effectiveness of sawdust ash, in this study, was evaluated from the CBR value. The test samples were also reviewed under conditions with and without immersion and with and without curing. Based on the test results, lime is very effective as an additive because it increases the CBR value of more than 100 at a level of 10%. Wood husk ash also increases the CBR value by 100%. The use of cement, lime and wood husk ash requires curing time so that there is a strong bond between the clay and additives. The use of additives without curing did not increase the CBR value. In the stabilization of clay with 10% lime, replacement of lime with wood husk ash by 4%-6%, can be used as a road sub-grade with good quality.
Analysis of the Capability of Pile Assembly Foundations in Soft Soil in Physical Modeling of Variationsiin Laboratory Scale Distances Rahman, Arief; Fatnanta, Ferry; Satibi, Syawal
ASTONJADRO Vol. 12 No. 1 (2023): ASTONJADRO
Publisher : Universitas Ibn Khaldun Bogor

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32832/astonjadro.v12i1.8139

Abstract

The capacity of raft foundations, pile foundations and pile rafts on soft soil with variations in the distance between the piles. Perform analysis of the carrying capacity and settlement of each foundation test and then compare the results of the theoretical carrying capacity research with the analysis of carrying capacity calculations. The implementation of the test prepares the test along with samples of the raft foundation, pile foundation and pile raft foundation. The test were carried out using a gradual load then a dial gauge is placed at both ends of the sample raft and the load reading is taken. The pile foundation was tested with a decrease of 10 cm while the settlement on the raft foundation and the pile raft foundation was 3 cm, the carrying capacity of the raft foundation was 24 kg, the pile foundation varied 4D distances; 6D and 8D, namely 7.5 kg and the foundation of the pile raft with variations in 4D distance; 6D and 8D are 26 ; 32 and 32 kg. In the interpretation method, the pile raft foundation with various distances increased from 4D to 6D but decreased in 8D. Pile raft foundations with various distances between pile have not a significant effect where raft foundations are more dominant in supporting resistance than pile foundations.
Analisis Potensi Likuifaksi Berdasarkan Data SPT Di Kulon Progo Yogyakarta Nova, Septi Devita; Fatnanta, Ferry; Yusa, Muhamad
Journal of Infrastructure and Construction Technology Vol. 1 No. 2 (2023): July 2023
Publisher : Dept. of Civil Engineering Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56208/jictech.1.2.52-66

Abstract

Liquefaction is a process of changing soil properties when the solid state becomes liquid caused by cyclic loads as a result of an earthquake so that the pore water pressure increases, approaching and even exceeding the magnitude of the total pressure. Liquefaction occurs due to earthquakes that occur in the area. Tectonic earthquake is one type of earthquake that can trigger liquefaction. The purpose of this study was to examine the potential for liquefaction in Kulon Progo Yogyakarta as the location of the New Yogyakarta International Airport, analyze the safety score (FS), and the value of the liquefaction potential index (LPI). The method used is the Idriss – Boulanger (2014) method using SPT data which is tested at three test points, namely BH-01, BH-03, and BH-06. For this study earthquake data were obtained from the USGS site and the 2017 Earthquake Hazard Map with variations in the earthquake magnitude used were 5.00; 6.30; and 8.10 and ground acceleration data using a probability of 7% in 75 years with a return period of 1000 years. Soil classification based on USCS shows that the soil at the study site is poorly graded sand which contains little fine grain. The results of the study indicate that the research location is prone to liquefaction. Liquefaction occurs at each test point at depth of 4.00 m and 6,00 m, especially at Mw 8.1 and amax 0,48 g with variation where soil resistance is low. Then, based on the classification of the liquefaction potential index numbers which are in the low to high range and the estimated decrease that occurs is up to 23,6 cm.
Evaluation of Particle Grain Size of Sand Embankment for Liquefaction Above Peat Against Vibration Agus Nugroho, Soewignjo; Yusa, Muhamad; Putra, Agus Ika; Satibi, Syawal; Fatnanta, Ferry; Wibisono, Gunawan; Rinaldi, Rinaldi; Hasibuan, Putra S
Journal of Infrastructure and Construction Technology Vol. 3 No. 1 (2025): January 2025
Publisher : Dept. of Civil Engineering Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56208/jictech.3.1.1-8

Abstract

Liquefaction is the transformation of soil into a liquid. The vibrating table in this study moves in a horizontal direction and the opposite manner in a vertical direction utilizing modelling. Acceleration variations of 0.25 g and 0.32 g were employed. The dirt was 10 centimetres thick. The sand clusters were 15 cm thick, with differences in debris gradient size and water surface on the sample. The uniform load that was employed was 40 kg/m2. Examine the drop of the ground surface and the rising of the porous water for signs of liquefaction. A 0.5mm diameter glass pipe was used to measure the porous water pressure. The test findings revealed that with higher acceleration, effective vertical voltage, and porous water ratio values, the rate of particle graduation has a major influence on the occurrence of liquefaction potential. The test results revealed that poorly graduated fine sand experienced maximum effective vertical stress and elevated porous water ratio values (Ru), whereas well-graded sand tended to be more stable.
Karakteristik Nilai Kuat Tekan Bebas Stabilisasi Semen Tanah CL-ML Terhadap Siklus Pembahasan Pengeringan Pratama, Dodi; Fatnanta, Ferry; Muhardi, Muhardi
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 5, No 1 (2018): Wisuda April Tahun 2018
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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

Abstract

The soil that classified as CL-ML soil have range of plasticity index around 4% s/d 7%, and liquid limit with range 12% s/d 30% according to the Casagrande Plasticity graph, this soil condition is very susceptible to the addition of water content so that cause soil at winter season being easily melted as a porridge and cracked as of existed at retrieval specimen location at dry season. This retrieval specimen location located at Government Office of Pekanbaru Area, Indonesia. This situation being problem if there is construction work above it such as road construction. Soil restoration is necessary for stabilizing soil. In this case used stabilizing soil chemically. Ihis research focuses to cycle process of wet-dry toward soil mechanical characterize effect that stabilized by cement. This research result showed that value of unconfined compressive strength toward wet-dry cycle have different values. Cement addition to CL-ML soil get very significant increasing of unconfined compressive strength. Highest increasing unconfined compressive strength is on 7 days curing, 3x 24 hours, drying second cycle about 1.636,51 kPa, this thing caused by cement that contained in 7 days cured soil reacted and turned into paste dan eventually cement that contained in soil start hardened, so that is able to increasing unconfined compressive strength value high enough.Keywords: Wet-dry cycle, UCS, CL-ML, cement stabilization.
Pengaruh Abu Sekam Kayu Pada Nilai Unconfined Compression Strength Lempung Plastisitas Tinggi Terstabilisasi Semen Kapur NUGROHO, Soewignjo Agus; Al Ridho, Muhammad Faisal; Fatnanta, Ferry
Teras Jurnal : Jurnal Teknik Sipil Vol. 12 No. 1 (2022): Volume 12 Nomor 1, Maret 2022
Publisher : UNIVERSITAS MALIKUSSALEH

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29103/tj.v12i1.688

Abstract

Abstrak Perbaikan lempung dengan semen, kapur, dan abu sekam (RHA) terbukti meningkatkan kuat geser dan daya dukung. Kandungan silika abu sekam kayu (ASK) hampir sama dengan RHA. Penelitian melihat pengaruh ASK pada lempung terstabilisasi semen dan kapur. Pengujian Tekan bebas (UCS) dilakukan untuk membandingkan nilai kuat tekan bebas (qu) lempung asli, lempung distabilisasi semen, dan kombinasi semen dan kapur dan/atau ASK. Sampel diuji pada empat kondisi. Hasil UCS tanpa pemeraman, nilai qu seragam. Pada kondisi tanpa pemeraman dan perendaman, nilai qu semua variasi relatif sama. Pada kondisi pemeraman dan tanpa perendaman, nilai qu berkisar 365 kPa sampai dengan 485 kPa untuk campuran dengan ASK dan kombinasi kapur dengan ASK. Penambahan kapur 10% meningkatkan nilai qu lebih 1100 kPa. Hasil UCS membuktikan, kapur lebih optimal meningkatkan nilai qu dibanding ASK. Penggantian kapur dengan ASK 4% sampai 6% meningkatkan nilai qu menjadi 485 kPa (rendaman) dan menjadi 475 kPa (tanpa rendaman). Kata kunci: Abu sekam Kayu, Kapur, lempung, semen, stabilisasi  Abstract Clay stabilized with cement, lime, and rice hush ash (RHA) has been increasing shear strength and bearing capacity. The silica content of wood husk ash (ASK) is almost the same as RHA. The study seen effect of ASK on clay-cement and lime. Unconfined Compression Strength (UCS) is performed and compare unconfining strength values (qu) of clay, clay-cement, and cement and lime and/or ASK. Sampel was tested on four conditions. UCS results without watering, uniform qu value. Conditions non-curing and soaked, the qu values of all variations are relatively the same. In curing and unsoaked conditions, qu values range from 365 kPa to 485 kPa for ASK and lime with ASK. Adding 10% lime increases qu value more than 1100 kPa. Stabilized with lime is more optimal than ASK to increase qu. Subtitution lime with ASK 4% to 6% increases qu value to 485 kPa (soaked) and to 475 kPa (unsoaked). Keywords: clay, cement, lime, sawdust ash, stabilization 
Peningkatan Kemampuan Perangkat Desa Dalam Pengelolaan Arsip Digital (E-Filing) Di Desa Aur Sati Kabupaten Kampar Olivia, Monita; Malik, Alfian; Fatnanta, Ferry; Gussyafri, Haji; Novan, Andre; Ikhsan, Muhammad; Wibisono, Gunawan; Lubis, Shakila Fuadah; Maulidi, M Aldi; Fadhlurrahman, Fadhlurrahman
Journal of Community Engagement Research for Sustainability Vol. 4 No. 2 (2024): Maret
Publisher : Lembaga Penelitian dan Pengabdian kepada Masyarakat Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31258/cers.4.2.45-56

Abstract

Aur Sati Village is one of the newly formed communities in Kampar Regency, Riau Province. Some administrative tasks, such as archive management, can improve village government services to the community. Village archives are currently stored manually and need to use digital archiving methods. Digital archive management can be used as a storage place for documents and can help overcome the lack of computer equipment owned by village officials. This program aims to increase the knowledge of village administrators regarding digital archive management (e-filing). The implementation of the e-filing program for Aur Sati Village officials is very useful in carrying out their administrative duties. There are three steps to the program: planning, implementation and success assessment. A survey with local leaders was part of the preparation step. An initial presentation, pre-test, and training on digital records management (e-filing) were conducted during the implementation phase using an app scanner, Google Drive, and Google Sheets. Village governments were given a post-test questionnaire to measure their skills during the evaluation phase. As a result, village governments showed a good understanding of e-filing and its management. Based on the post-test evaluation, most village officials and administrative staff in Aur Sati Village are able to digitally archive official letters (e-filing) and reduce the possibility of losing archives in the future.
Pengaruh Waktu Terhadap Daya Dukung Fondasi Tiang Pada Tanah Lunak Dengan Variasi Kekasaran Satria, Zoni; Fatnanta, Ferry; Nugroho, Soewignjo Agus
Jurnal Rekayasa Sipil (JRS-Unand) Vol. 16 No. 1 (2020)
Publisher : Civil Engineering Departement, Andalas University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/jrs.16.1.12-24.2020

Abstract

Kapasitas daya dukung tanah lunak sangat kecil, untuk peningkatan daya dukung digunakan fondasi tiang friksi yang menggunakan kekasaran permukaan tiang dengan waktu pemancangan yang telah ditentukan yaitu 0, 4, 8, 16, 32, dan 64 hari. Tujuan penelitian ini adalah Menentukan seberapa besar peningkatan kapasitas daya dukung fondasi tiang dengan variasi kekasaran permukaan tiang dan waktu pengujian pembebanan. Pengujian pembebanan menggunkan metode CRP (Constant Rate of Penetration Method) sedangkan untuk interpretasi kapasitas aksial tiang pancang menggunakan metode Terzaghi dan Peck. Semua variasi waktu akan dianalisis dan dibandingkan hasil daya dukung aksial dari fondasi tiang polos, kekasaran spasi dan kekasaran penuh. Hasil penelitian menunjukan peningkatan daya dukung selalu meningakat dari umur 0 sampai 64 hari. Kapasitas daya dukung fondasi tiang terbesar terdapat pada tiang kekasaran spasi yaitu 55,9 N. tiang kekasaran penuh sebesar 54,5 N dan tiang polos sebesar 22,8 N. Faktor peningkatan daya dukung (∆10) tiang polos sebesar 0,04,  tiang spasi 0,07 dan tiang penuh 0,09 dengan waktu referensi (t0) = 1 hari. Faktor peningkatan (∆10 ) menunjukan faktor peningkatan kapasitas daya dukung tiang seiringnya dengan pertambahan waktu. 
Co-Authors ', Muhardi . Zulfan Abdul Halim Muqorrobin Abdullah Ihsan Alkubuwi Achmad Noerkhaerin Putra Adi, Sapria Adi, Sapria Adnan Ruziq Ihsan Agus Ika Putra Agus Nugroho, Soewignjo Aisyah Putri Al Ridho, Muhammad Faisal Albajili, Farian Alfian Alfian Alfian Malik Alridho, Muhammad Faizal Andius Dasa Putra Anggara, Vebrian Aprillia. H.R., Bella Aras Mulyadi Ari Sandhyavitri Arief Rahman Arifan Farhan Ariza, Ariza Azizah . Azra Zulnasari Bramson P Manik, Bramson P Charles AN Daniel Irfan Dede Subhan Dodi Pratama Dodi Pratama Doris Ade Widyarti Effendi Sianipar Ela Fitriana Endala Siboro Epi Mili Yanti Erwin Satria Anugrah Fachry Abda El Rahman Fadel Muhammad Fadhilah, Randy Fadhlurrahman, Fadhlurrahman Fadlan Fadlan Fajrian Saddek Fauzan Hidayattullah Fauzi, Manyuk FERI SETIAWAN Fikri Ananda Fikri Hidayat Frimadofi Frimadofi Galang Maulana Gina Purnama Sari Giri Prayoga Gunawan Wibisono Gunawan Wibisono Gussyafri Gustika, Rani Ardeylina Hadiyan Putra, Hadiyan Haryo Dwito Armono Hasibuan, Putra S Hengki Tornando Herli Fajri Himmatul Azizah HR, Bella Aprilia Ihsan, Adnan Ruziq Imam Hanafi Imam Suprayogi Irfan Hasan Iskandar Romey Sitompul Joshua, Norman Julperizal Julperizal Khairatu Zaro Laksono Trisnantoro Lembasi, Muhammad Khadafi Lingga Panji Subrata, Lingga Panji Lisa Trisnawati Lubis, Shakila Fuadah M Faizal Alridho M. Yusa Maulidi, M Aldi Monita Olivia Mufriadi Mufriadi Muhamad Yusa Muhammad Ikhsan Muhammad Khadafi Lembasi Muhammad Naufal Muhammad Rico Saputra Muhammad Safrianda Muhammad Yevizal Muhammad Yusa Muhardi Muhardi Muhardi Mukhelnalis Sutazril Muliyono Nova, Septi Devita Novan, Andre Oktareza, Ewis Ongko, Andarsin Prayogo, Giri Rafika Rani Zainuddin Rahman, Sayful Ralan Ditra Ranata, Nicola Rabb Remon Muslim Riady, Azhar Rinaldi Rinaldi Rinaldi Rinaldi Rio Hidayat Rio Zambika Rizqi Yuliana Rizqy Ridho Prakasa Robi Handi Putra Ronny Tigor Sitanggang S A Nugroho Said Defri Ariandi Saputra, Adetia Saputra, Riola Satibi, Syawal Satria, Zoni Sayoga, Davin Simanjuntak, Lambok Jadiaman Soewignjo Agus Soewignjo Agus Nugroho Soewignjo Agus Nugroho Sofyan Subhan, Dede Suhaimi Siregar Suratman Suratman Suryadi Ramadhan Sutikno, Sigit Syamsul Arifin Tiara Mahardika Tornando, Hengki Trimaijon Trimaijon Trimaijon, Trimaijon Unzi Marwan Usman Muhammad Tang Usman, Fauzan Vebrian Anggara Wahyudi Citrosiswoyo Wahyudi Citrosiswoyo Wahyudi Citrosiswoyo Widi Agoes Pratikto Widi Pratikto Widi Pratikto, Widi Wulan Sri Rahayu Wulandari, Deny Yolanda Widyan Yoyon Kurniawan Yusa, M. Yusa, Muhammad Zoni Satria Zulnasari, Azra