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Yulvi Zaika
Department Of Civil Engineering, Brawijaya University, Malang, 65145,
Civil Engineering, Building, Construction & Architecture Earth & Planetary Sciences Energy Physics Transportation

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Journal : Rekayasa Sipil

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Pengaruh Penambahan Abu Ampas Tebu dan Kapur Terhadap Karakteristik Tanah Lempung Ekspansif (Studi Kasus : Tanah di Bojonegoro) Yanwar Eko Prasetyo; Yulvi Zaika; Arief Rachmansyah
Rekayasa Sipil Vol 12, No 2 (2018)
Publisher : Department of Civil Engineering, Faculty of Engineering, University of Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/ub.rekayasasipil.2018.012.02.7

Abstract

In each region having different types of soil, one type of soil is expansive clay. In Indonesia, more than 1/5 of the land area in Indonesia are an expansive clay. This type of soil will affected by changes in water content and experience significant shrinkage. Therefore, to improve the soil and minimize shrinkage growth, an effort is needed, one of which is soil stabilization. Physical testing of soil with soil samples in the district Ngasem, Kab. Bojonegoro which is expansive clay soil shows that the CBR value is 3.953%, and the swelling value is 6.1858%. With such physical conditions with low carrying capacity it is necessary to stabilize the soil on clay in Bojonegoro. Stabilization efforts carried out are by chemical stabilization by mixing soil samples with additives in the form of bagasse and lime ash. The results of the physical soil test from the preliminary research conducted by the author by mixing bagasse ash in the soil with variations in levels of 8%, 10%, 12%, 14% showed a mixture of 8% bagasse ash was the optimum level for repairs to the soil. So it is used a mixture of 8% bagasse ash with the addition of variations in lime content of 4%, 6% and 8% of the total weight of the mixture. A mixture of 8% bagasse ash and 6% lime content produced a CBR value of 9,324%, this CBR value increased to 135.87%. While the swelling value is 0.1681%, with the same mixture level. This swelling value decreased to 97.28%. For the value of free development it decreased to 217.7% from the previous one which amounted to 70.59% to 22.22%.
THE EFFECT OF THE USE PREFABRICATED VERTICAL DRAIN (PVD) ON SOFT SOIL CONSTRUCTION OF BANDUNG CITY ROAD WITH FINITE ELEMENT ANALYSIS Mariyana Mariyana; Yulvi Zaika; Harimurti Harimurti
Rekayasa Sipil Vol 15, No 3 (2021)
Publisher : Department of Civil Engineering, Faculty of Engineering, Universitas Brawijaya

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Abstract

Soft soil has more water and air content than solid soil particles, so it has a large settlement and soil consolidation lasts longer. Soil improvement will be able to minimize the settlement and consolidation process by adding preloading PVD combination. The effect of PVD installation and preloading is analyzed using Finite element analysis. An equivalence between plane strain and axisymmetric is made to obtain a 2D finite element analysis that is closer to field conditions. The equivalent equation between axisymmetric to plane strain has been proposed by the Indraratna Method. This study aims to determine the stress-strain behavior, pore water pressure, and stability in the use of PVD as well as the effects of smear zone. The result of the analysis is the greater the permeability value of the disturbed smear zone, the smaller the degree of total consolidation that occurs. The degree of total consolidation is proportional to the magnitude of the settlement that occurs over a certain period of time. Therefore, if the settlement is greater, the value of the degree of total consolidation will follow.
Penggunaan Geotextil sebagai Alternatif Perbaikan Tanah Terhadap Penurunan Pondasi Dangkal Yulvi Zaika; Budi Agus Kombino
Rekayasa Sipil Vol 4, No 2 (2010)
Publisher : Department of Civil Engineering, Faculty of Engineering, University of Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (332.479 KB)

Abstract

Proses penurunan pondasi diakibatkan oleh terkompresinya lapisan tanah di bawah pondasi akibatbeban struktur. Pada penelitian ini dilakukan perhitungan pengaruh pemasangan perkuatan pada penurunanpondasi dangkal pada tanah lunak di kawasan Aie Pacah Padang. Analisa perkuatan dilakukan pada tanahlempung lunak dan tanah timbunan pasir yang diberi perkuatan 1,2,3 dan 4 lapis. Dari hasil yang didapatkan,tanah lempung lunak yang dibebani dengan pondasi mengalami penurunan yang lebih besar dari penurunanizin Pemasangan 2 lapis perkuatan memberikan hasil optimum pada tanah lempung yaitu denganpengurangan penurunan sebesar 97.26 %. 
RELATIONSHIP OF AREA RATIO TO DISPLACEMENT ON SUBGRADE STABILIZED BY DEEP SOIL MIXING Dara Ayu Lisna Hadi; Yulvi Zaika; As’ad Munawir
Rekayasa Sipil Vol. 16 No. 2 (2022): Rekayasa Sipil Vol.16. No.2
Publisher : Department of Civil Engineering, Faculty of Engineering, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/ub.rekayasasipil.2022.016.02.6

Abstract

Expansive clay soil has high potential of swelling due to minerals content which bind water, therefore, soil improvement is required to stabilize the swelling behavior by add binder additive such as lime in deep soil mixing method (DSM). In this study, Finite Element model approach was performed with embankment provided on the top of expansive clay layer to provide bearing layer for road construction. As the deep soil mixing is applied on the subgrade (expansive clay layer), some model variation is performed such as diameter variation with 0.4m; 0.6m; 0.8m, depth variation with 5m; 6.5m; 8m and space variation 0.8 m;1.2m;1.6m; 2.4m. Area ratio parameter also used for ease understanding of deep soil mixing behavior with so many model variations provided. Analysis results shows that higher area ratio of deep soil mixing will provide lower displacement value either immediate displacement or consolidation displacement. Moreover, plot result of area ratio shows that area ratio of 0.4 provide effective value regarding consolidation displacement and duration.
Co-Authors . Harimurti ., Frangky ., Lestari ., Mayangsari Abadi, Willy Anggi Abhista Bariq, Muhammad Rafi Acramanila Magha Rastra Adelina Maulidya Firdaus Adi Susilo Agus Suharyanto Agus Suharyanto Al Imam, M. Akbar Alfianto, Galih Alif, Faisal Abda Allo, Angeline Grace Aloysius Gregorius Lake Alwafi Pujiraharjo Amalina, Rahma Nur Ana Sri Wahyuni Anggraeni, Gita Maulina Anshorie, Ahya Al Ansor, Zakaria Al Aprilian, Arie Wahyu Aqim, Angga Qinwanul Aramita, Devina Nadia Ardiyansari, Anisa Oktavia Arief Rachmansyah Arief Rachmansyah Arief Rachmansyah Arief Rachmansyah Arief Rachmansyah Arief Rachmansyah Arif Lukito Arif Rachmansyah Arung, Vrischa Natalia As'ad Munawir As'ad Munawir As'ad Munawir As’ad Munawir Astriyanto, Vicky Dwi Asyifa, Hira Bayu Rasmawan, I Made Adhi Biasmahendra, Bima Bima, Satria Budi Agus Kombino Carissa Imayanti, Nadia Izmi Chandra, Farhan Prima Citra, Ismiralda Dara Ayu Lisna Hadi Darmawan, Wahid Destamara, Angger Anggria Dharmawan, Aditya Leo Dianing Putri, Arinda Rahma Didik R. Santoso Edhi Wahjuni Setyowati Edward Prana Edward Prana, Edward Eko Andi S. Eko Andi Suryo Eko Andi Suryo Eko Andi Suryo Evan Kusuma Wijaya Fahara, Adista Famungkas, Fika Fathurrahman, Muhammad Rizki Faticha, Amalia Febra Ndaru W. Firdaus, Adelina Maulidya Firdaus, Reza Novianda Gilang R. Kololikiye Gilang Ramadan Kololikiye Gracius Teguh Imananto Hakim, Arif Luqman Harimurti . Harimurti . Harimurti Harimurti Harimurti Harimurti Harimurti Harimurti Haristama, Iffat Shafwan Hasbianto, Muhammad Hazhiyah, Amalia Ula Hendi Bowoputro Hendi Bowoputro Hendrig Sudradjat Herlien Indrawahyuni Herlien Indrawahyuni Hidayat, Mahesa Hutama Putra, Made Dwika Hutomo, Wahyudi Ika Sari, Ardya Perdani Immanuel Louis Yudianto Indradi Wijatmiko Ismail, Ahmad Ismanto Ismanto Iswara Elsam, Kevin Raditya Kartika Puspa N. Kosasih, Rendy Hartama Kurniawan, Ichvan Danny Kurniawan, Vemmy Kuswanda, Wahyu P. L Tobing, Benny Christian Laras, Ario Widio Listyaningrum, Galuh Ajeng Ludfi Djakfar Ludfi Djakfar Ludfi Djakfar Ludfi Djakfar M. Ato’urrahman M. Hamzah Hasyim M. Ruslin Anwar M.Ruslin Anwar M.Ruslin Anwar, M.Ruslin Ma’azza, Muhammad Ainun Maharani, Ragilya Mariyana Mariyana Meisy Putri Rahmawati, Ika Minata, Afria Nurizky Munawir, As'ad Munawir, As’ad Mustafid, Ainul Musthafa, Aris Nawang Aji Sasongko Nugraha, Prakosa Adi Nugroho, Cendana Putri Nur Arifin, Hadi Mizan Nur Fadli, Aji Gigih Nursanti, Luh Leta Milleila Oka Wibawa, Gede Arya P, Y E Permata, Ditha Pradika, Ivan Indra Pramadana, Farhan Prana, Resa Bagus Dharma Prasetyo, Dodik Prihatama, Wirawan Yuda Pudyono . Puspito, Abthal Hazazi Putra, Alesandro Anggara Putranto, Arif Rahman Putro, Galih Karno Qomar, Ach. Lailatul Rachamansyah, Arief Rachma, Saraswati Noor Rachmatullah, R. Irawan Raditya, Achmad Gusti Rahmadika, Andrianna Rahmadya, Reza Roseno Ramadhan, Bima Aldiha Ranggaesa, Riota Abeng Rasyid, Dyka Retry Ratriwarajiwa, Wiratama Risty, Fritz Rita Dyana Melati Riyana, Ratu Eka Robitul Y, RB. Akhmad Rofik, Mohammad Ainur Ruslin Anwar Sanjaya, Muhammad Dias Saputra, Ferdian Budi Saputra, M. Rizky Hari Saputri, Salwa Saraswati, Fanny Ika Sarithayanti Mahaguna, Ida Ayu Satriaka, Irza Andys Sauri, Sofyan Septiningrum, Pritha Audina Shafira, Nisa Sirait, Solapida Glenesya Sugeng Prayitno Budio Suroso . Suroso Suroso Suroso Suroso Susilo, Hendro Suwandoko, Adiwena Bachtiar Syafi'ah, Syafi'ah Tejokusumo, Radius Suryajaya Ubaidillah, Lina Rahman Ulya, Atika Nikmatul Undiprastya, Guruh Wahyunita, Audia Maknolia Wardhana, Febra Ndaru Widagdo, Yanuar Eko Widodo Suyadi Widodo Suyadi Widodo Suyadi Widyanatha, KadekDwi Kusuma Yandri, Muhammad Yanwar Eko Prasetyo Yenny Yenny Yosephine Diajeng Janur Yunita Listiana Putri Zahra Febrina Lilabsari Zettyara, Firda Zubaedah, Endah