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All Journal Bulletin of Scientific Contribution : Geology IJOG : Indonesian Journal on Geoscience Jurnal Berkala Ilmu Perpustakaan dan Informasi Jurnal RISET Geologi dan Pertambangan Dharmakarya : Jurnal Aplikasi Ipteks Untuk Masyarakat Jurnal Geosaintek Jurnal Ilmiah Dinamika Rekayasa (DINAREK) Journal of Geoscience, Engineering, Environment, and Technology Jurnal Geologi dan Sumberdaya Mineral (Journal of Geology and Mineral Resources) JLBG (Jurnal Lingkungan dan Bencana Geologi) (Journal of Environment and Geological Hazards) Spektra: Jurnal Fisika dan Aplikasinya Buletin Sumber Daya Geologi Jurnal Geosains dan Teknologi Kumawula: Jurnal Pengabdian Kepada Masyarakat Prosiding Temu Profesi Tahunan PERHAPI Dinamika Lingkungan Indonesia Jurnal Geominerba Jurnal Geologi dan Sumberdaya Mineral (Journal of Geology and Mineral Resources) Journal of Geosciences and Applied Geology BACA: Jurnal Dokumentasi dan Informasi Jurnal Geosaintek

Zufialdi Zakaria

Fakultas Teknik Geologi, Universitas Padjadjaran

Author-ID : 525619

Aerospace Engineering Agriculture, Biological Sciences & Forestry Arts Humanities Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture 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 Languange, Linguistic, Communication & Media Library & Information Science Materials Science & Nanotechnology Physics Public Health Social Sciences Other

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KERAPATAN KELURUSAN SUNGAI DI WILAYAH MAJALENGKA DAN HUBUNGANNYA DENGAN VARIABEL MEKANIKA TANAH: SUDUT GESER-DALAM Zakaria, Zufialdi; Sophian, Irvan
Bulletin of Scientific Contribution Vol 13, No 2 (2015): Bulletin of Scientific Contribution
Publisher : Fakultas Teknik Geologi Universitas Padjadjaran

Areas of the research include the role in The Eastern Zone of Bogor Basin. In this research are Research areas included in the Eastern zone Bogor Basin. In this research are discussed: 1) The role of tectonic and drainage lineament on Tertiary and Quaternary rocks in the study area; 2) The role of soil variables that are part of the parent rock material. The method used is a probabilistic analysis involving friction angle and lineament densty. The results showed: 1) The absence of differences in the direction of linemament drainage patterns on Tertiary and Quaternary rocks, indicating the influence of the deformation of the same, namely the upligt, the two rocks together to experience the rapture; 2) The density llinemanet associated with one variable, namely internal friction angle (phi). Internal friction angle (phi) decreases with increasing density lineament.

PENDIDIKAN GEOLOGI MILITER DI INDONESIA, SUATU TANTANGAN BAGI PUSDIKLAT GEOLOGI DAN PERGURUAN TINGGI PENYELENGGARA PENDIDIKAN SAINS KEBUMIAN -, Zufialdi Zakaria
Bulletin of Scientific Contribution Vol 8, No 1 (2010): Bulletin of Scientific Contribution
Publisher : Fakultas Teknik Geologi Universitas Padjadjaran

Geology plays a role in various fields. In the field of military and national defense, geological branch that play a role is military geology. In Indonesia, there are no special units of military geology that handling of military geology. Military geology education was also not in the curriculum of the University of geoscience education providers. Geological training and education center is also not have modules and syllabus for military geology . These conditions is a challenge to provide military-geology education for personnel of military of Indonesian National Army , or to the geologists who are interested in working in the military

Identifikasi Gerakan Tanah (Longsor) di Kabupaten Garut, Jawa Barat Sabila, Zahra Syahida; Sukiyah, Emi; Alam, Boy Yoseph Cahya Sunan Sakti Syah; Zakaria, Zufialdi
Bulletin of Scientific Contribution Vol 16, No 1 (2018): Bulletin of Scientific Contribution GEOLOGY
Publisher : Fakultas Teknik Geologi Universitas Padjadjaran

Wilayah Kabupaten Garut, Provinsi Jawa Barat merupakan bagian dari zona gerakan tanah di Indonesia bagian barat. Indonesia bagian barat dibentuk akibat pengaruh tumbukan dua lempeng tektonik yaitu Indo-Australia dan Eurasia. Zona tersebut juga merupakan zona gempa dan zona gunungapi. Tanah residu yang tebal pada lereng dan curah hujan yang cukup tinggi di Jawa Barat merupakan salah satu penyebab daerah rawan longsor. Hal ini menjadi kendala bagi pengembangan wilayah Kabupaten Garut. Potensi gerakan tanah (longsor) pada daerah berlereng di Kabupaten Garut perlu mendapatkan perhatian. Sistem peringatan dini diperlukan untuk mengurangi potensi kebencanaan geologi gerakan tanah sehubungan dengan berbagai kegiatan atau proyek yang sudah ataupun akan dikembangkan.Kata Kunci: tektonik, gerakan tanah, sistem peringatan dini

PERBANDINGAN SOIL IMPROVEMENT PADA TANAH LAPUKAN BATUAN VULKANIK DI JATINANGOR, KABUPATEN SUMEDANG, DAN TANAH LAPUKAN BATUAN VULKANIK DI CIGINTUNG, MALAUSMA, KABUPATEN MAJALENGKA Zakaria, Zufialdi; Sophian, Irvan; Chaniago, Aulia Eka P S
Bulletin of Scientific Contribution Vol 15, No 3 (2017): Bulletin of Scientific Contribution:GEOLOGY
Publisher : Fakultas Teknik Geologi Universitas Padjadjaran

ABSTRACTSoil improvement is one of the methods of soil reinforcement. One method of soil improvement is the addition of soil with lime (CaO). The swelling soil (expanding when wet conditions, and shrinking when dry conditions) is identified from the value of soil activity. The behavior of soil activity decreases with increasing CaO, but for soils in weathered volcanic areas (volcanic breccia and lava) as in Jatinangor, with the value of high soil activity, the optimum addition of CaO to the soil is 15% and not more than 20%. Excessive addition of CaO tends to change the behavior of soil activity and increase the rate of activity. In the soil from weathered volcanic rock (tuff) as in Cigintung Village, District Malausma, in Majalengka, with the value of moderate to high soil activity, the addition of CaO is 15% to 20%. More than 20% CaO, activity number (A) decreases, but cohesion (c, Kg/M2) will decrease too, so the strength of soil will decrease. Keywords: swelling, activity number, soil improvement, ABSTRAKPerbaikan tanah (soil improvement) adalah salah satu metode perkuatan tanah. Salah satu metode soil improvement adalah penambahan tanah dengan kapur (CaO). Tanah yang bersifat swelling (mengembang bila basah dan mengerut bila kering) diidentifikasi dari nilai aktivitas tanahnya. Perilaku aktivitas tanah berkurang dengan bertambahnya CaO. Untuk tanah di daerah lapukan vulkanik (breksi vulkanik dan lava) seperti di Jatinangor, dengan nilai aktivitas tinggi, penambahan CaO yang optimum pada tanah mengembang adalah 15 % dan tidak lebih dari 20 %. Penambahan CaO yang berlebihan cenderung mengubah perilaku aktivitas tanah dan meningkatkan kembali angka aktivitas. Pada tanah lapukan batuan vulkanik (tuff) seperti di desa Cigintung, Kecamatan Malausma, di Kabupaten Majalengka, dengan aktivitas tanah sedang sampai tinggi, penambahan CaO cukup 15% sampai 20%. Lebih dari 20% CaO, maka angka aktivitas turun, namun kohesi akan turun pula sehingga kekuatan tanah justru akan berkurang. Kata kunci: swelling, angka aktivitas, perbaikan tanah

KARAKTERISTIK KETEKNIKAN TANAH DAN HUBUNGANNYA DENGAN PENGEMBANGAN WILAYAH DI KAWASAN PENGEMBANGAN TERPADU - JATINANGOR, KABUPATEN SUMEDANG, JAWA BARAT -, Zufialdi Zakaria; -, Yuyun Yuniardi; -, Irvan Sophian
Bulletin of Scientific Contribution Vol 5, No 1 (2007): Bulletin of Scientific Contribution
Publisher : Fakultas Teknik Geologi Universitas Padjadjaran

Soil in research areal consist of CH (clay, high plastisitas) and MH. (silt, high plastisitas). Soil activity at area of Jatinangor is vary from low activity to high. But in general soil activity is hidh-medium. Activity number by Seed is A = 0.40 until 0.86 with nature mineral of kaolinitic until ilitic. Stability of slope can be designed as according to slope-stability design. At exposition slope, slope with angle 45o, two terrace and ground water level at - 2 M, high of slope 5 M and level off 5 M, Safety Factor = 2.094. Soil bearing capacity for square, circular & continuous foundations have medium-high activity show relationship that: Increasing of soil activity value cause decreasing of value of soil bearing capacity. Safety Factor of slope and soil bearing capacity is very supporting of environmental aspect in Jatinangor development area. Geological evaluation of development area is required to study both aspect (slope safety and bearing capacity).Environmental management is required before the rains arrive, because ground water rate will increasing at rainfall condition. It is required to manage negative impact. It is required to anticipate or eliminated its impact, or generating positive impact to be managed by improving it. Environmental monitoring is required to be instructed as anticipatory effort of damages or effect of negative impact.

POTENSI TANAH MENGEMBANG DI KABUPATEN PURWAKARTA, JAWA BARAT -, Zufialdi Zakaria; -, Edi Tri Haryanto
Bulletin of Scientific Contribution Vol 8, No 2 (2010): Bulletin of Scientific Contribution
Publisher : Fakultas Teknik Geologi Universitas Padjadjaran

Based on Geological Map of Pamanukan Sheet (scale 1:100.00) and Karawang Sheet (1:100.000), at northern ward of Purwakarta Regency, there are some rocks formation, e.g. Jatiluhur Formation, Subang Formation, and some Aluvials. Swelling potential analysis is based on Seed Method (Seed, et al.,1962, from Hunt, 2007). Soil samples at Aluvial terrain shows swelling characteristics very high (usually at clay of Subang Formation), its activity value is 1.31, predicted monmorilonitic (Bowles, 1989). Soil sample at clay terrain of Subang Formation shows low swelling potential (its not characteristic of Subang Formation), activity value is 0.21 (is predicted Illitic based on Bowles, 1989), and soil sample at clay terrain of Jatiluhur Formation, shows medium swelling potential characteristic with activity value is 0.52.

“SAVE WATER, SAVE JAKARTA” CAMPAIGN AS LAND SUBSIDENCE MITIGATION IN JAKARTA Jihadi, Luthfan Harisan; Ali, Abu Abdillah; Zakaria, Zufialdi; Anural, Muhammad Bey
Bulletin of Scientific Contribution Vol 12, No 1 (2014): Bulletin of Scientific Contribution
Publisher : Fakultas Teknik Geologi Universitas Padjadjaran

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24198/bsc.v12i1.8363

Jakarta, a very populated capital city of Indonesia, was built above alluvial deposit which is currently subsiding relative to sea level at a high rate. As a result Jakarta becomes more often to be flooded with water that delivered from other regions and also the sea level rises relative to land and shoreline move toward the ground are increasing feasibility of tidal flood to occur. Consolidation process of the ground acts as a cause to the land subsidence in Jakarta. The fact is water needs in Jakarta is high due to its high population. Therefore, large amount in withdrawal of groundwater occurs and causes the ground to settle. In order to decrease the rate of land subsidence, groundwater should be extracted in a proper, more effective and efficient way. Younger generation is advised to save water using a fresh approach which is easy to be understood and accepted. In the future, people in Jakarta will consider that saving water as a norm which brings great benefit to their environment, Jakarta.

PERILAKU AKTIVITAS TANAH UNTUK MENDUKUNG INFRASTRUKTUR DI MAJALENGKA DAN SEKITARNYA -, Zufialdi Zakaria
Bulletin of Scientific Contribution Vol 10, No 1 (2012): Bulletin of Scientific Contribution
Publisher : Fakultas Teknik Geologi Universitas Padjadjaran

Physical development of the region will always be associated with infrastructure studies. Construction plans in Kertajati International Airport, will bring the study of the infrastructure related to public facilities, which supports the international airport in West Java. Including a study of infrastructures are the foundation for buildings, roads, bridges, buildings, dams, etc., also the slope which is the result of slope stability design. This study discusses the behavior of the activity of high plasticity clay (CH) toward safety factor of slope and soil bearing capacity. Safety factor of slope is represented by value of FS (Factor of Safety) with a specified slope angle, so the increasing soil activity (A) is known relationship with a decrease in the value of the slope safety factor (FS). Soil bearing capacity is represented by the value of qa (allowable soil bearing capacity) for square and circular foundation type, so that the relationship of soil bearing capacity is decreasing with increasing value of soil activity. The study is expected to be developed, to facilitate the safety factor is the estimated slope and soil bearing capacity estimated by examining the number of activity as an early indicator. The relationship between the allowable soil bearing capacity (qa) for shallow foundations (of a square type) with soil activity (Skempton, and Seed) shows the equation qa = 7.89890 A (-1.01759) a negative relationship with correlation coefficient R = - 0754, and qa = 8.81669 A (-0.83957) a negative relationship with correlation coefficient R = - 0722. The relationship between the allowable soil bearing capacity (qa) for shallow foundation (of a circular type) with soil activity (Skempton, and Seed) shows the equation qa = 7.80513 A (-1.06644) a negative relationship with correlation coefficient R = - 0780, and qa = 8.77028 A (-0.88473) a negative relationship with correlation coefficient R = - 0722, it indicates that bearing capacity land values decline with increasing soil activity. The relationship between the security factor (FS) with 15o slope angle A activity figures show the equation FS = 1.517 A -0.79 with R ² = 0.625; The relationship between the safety factor (FS) with 30o slope angle A activity figures show the equation FS = 1.721 A - 0.78 with R ² = 0.64. Handling of expansive soil can be through soil improvement. To planning the foundation and slope infrastructures, is required safe design in accordance with assessment of soil bearing capacity and Factor of Safety (FS) of slopes, in order to avoid design failure.

GEOTECHNICS STUDY FOR DESIGN OF OPEN PIT SLOPES AT COAL MINING SITE PLAN, SAROLANGUN, JAMBI -, Geni Dipatunggoro; -, Zufialdi Zakaria; -, Irvan Sophian
Bulletin of Scientific Contribution Vol 9, No 2 (2011): Bulletin of Scientific Contribution
Publisher : Fakultas Teknik Geologi Universitas Padjadjaran

Site plan of coal mining at Sorolangun, Jambi, is required geotechnical study for cut slope design. Mining plan. In open pit plan, to take stable slope, is required slope mass rating (SMR). SMR method is requiring rock mass rating value. According to soil and weak-rock mass properties of Muaraenim Formation, stable

POTENSI MENGEMBANG TANAH LEMPUNG DI WILAYAH KAMPUNG CIGINTUNG, DESA CIMUNCANG, KECAMATAN MALAUSMA, KABUPATEN MAJALENGKA, PROVINSI JAWA BARAT Retnoningtyas, Widya Ika; Zakaria, Zufialdi; Sukiyah, Emi
Bulletin of Scientific Contribution Vol 15, No 2 (2017): Bulletin of Scientific Contribution GEOLOGY
Publisher : Fakultas Teknik Geologi Universitas Padjadjaran

ABSTRAKDaerah penelitian di wilayah Majalengka, Provinsi Jawa Barat tersusun oleh batuan hasil endapan gunungapi tua (Qtvs), dan Formasi Kaliwangu (Tpkw). Hasil pelapukan batuan tersebut berupa tanah lempung dengan potensi mengembang. Tujuan dari penelitian ini adalah untuk mengetahui tingkat mengembang, dan bahaya yang ditimbulkan dari tanah lempung yang ada diwilayah penelitian berkaitan dengan gerakan tanah yang sering terjadi di wilayah ini. Tingkat potensi mengembang tanah lempung ini dapat dianalisis menggunakan data mekanika tanah, yaitu indek plastisitas dan persen lempung. Data mekanika tanah tersebut digunakan untuk menghitung nilai aktifitas dari lempung. Berdasarkan klasifikasi skempton nilai aktiftitas lempung yang didapat adalah 0,62 sampai 1,35. Jenis mineral lempung Illite dan Monmorilonite (Ca), dan tingkat potensi mengembang tinggi sampai sangat tinggi. Sedangkan berdasarkan klasifikasi Bowles dan Seed menunjukkan nilai aktifitas sebesar 0,79 sampai 1,80, dengan jenis mineral lempung Illite dan Monmorilonite, dan potensi mengembang tanah lempung ini adalah tinggi sampai sangat tinggi. Kata kunci: Potensi mengembang, lempung, nilai aktiftitas, indek plastisitas, persen lempung. ABSTRACTThe research area in Majalengka, West Java consist are older volcanic (Qvts) and Formation Kaliwangu (Tpkw). Result weathering of the rock is clay with potential to swelling. The purpose of this study is to determine the rate of swelling and the hazard potential at the area posed from clay. Swelling potential of this clay soil analyzed using by soil mechanical data with the index of plasticity and percentage of clay. The soil mechanical data used to calculate the activity value of clay. Based on skempton analysis results of analysis is 0.62 to 1.35, with Illite and Monmorilonite (Ca) clay minerals and swelling clay potential high up to very high. Based on the Bowles and seed classification showing activity values of 0.79 to 1.80, with the type of clay minerals Illite and Montmorillonite and swelling clay potential is high to very high. Keywords: Potential of Swelling, clay, value of activity, plastisity indeks, percent of clays.

Co-Authors abdullah, Fajar Abu Abdillah Ali, Abu Abdillah Achmad Djumarma Wirakusumah Adiwijaya, Annisa Ayungingtyas Pratiwi Adjat Sudradjat Adriansyah, Yan Agung Mulyo Agus Wiramsya Oscar Alpionisa, Salsabila Nur Ambar Yoganingrum Andriani, Tati Andriani, Tati Anggoro Tri Mursito Anggoro Tri Mursito APRILIAN, YOGA Arie Afriadi Asykarulloh, Abdul Wahid Aton Patonah Bakhtiar, Taufiq Bambang Sugiarto Basuki, Jodi Prakoso Boy Yoseph Cahya Sunan Sakti Syah Alam Bustomi, Zhafran Muhammad Asyam Chaniago, Aulia Eka P S Chen, Reynara Davin Dicky Muslim Dinata, Muhammad Nasheer Ramdan Dwi Purnomo Edi Tri - Haryanto, Edi Tri - Edi Tri Haryanto Edi Tri Haryanto -, Edi Tri Haryanto Eko Tri Sumarnadi Emi Sukiyah Emy Sukiyah Ersyari, Jodistriawan Euis Tintin Yuningsih Febri Hirnawan -, Febri Hirnawan Firmansyah, M. Nizar Geni - Dipatunggoro, Geni - Geni Dipatunggoro -, Geni Dipatunggoro Gilang Perwira Adi Hendarmawan Hendarmawan Heri Nurohman Heriwaseso, Anjar Herryal Zoelkarnain Anwar Heryadi Rachmat Imam Santosa Indra Permanajati, Indra Irvan Sophian Irvan Sophian -, Irvan Sophian Irvan Sophian, Irvan Ismawan - Ismawan Ismawan, Ismawan Iyan Haryanto Jakah Jakah Jakah Jakah Jakah, Jakah Jhon Pengarapen Barus Jodistriawan Ersyari Johanes Hutabarat Jumhari Jumhari Khoirullah, Nur Kristiawan, Yohandi Lukman Muhammad Asri Luthfan H. Jihadi -, Luthfan H. Jihadi Luthfan H. Jihadi, Luthfan H. Luthfan Harisan Jihadi, Luthfan Harisan M Sapari Dwi Hadian M. Bey Anural -, M. Bey Anural MANIK, VITO ARISTO Mochamad Sapari Dwi Hadian Mubarak, Aziez Muhamad Ridwan Muhammad Bey Anural, Muhammad Bey Muhammad Kurniawan Alfadli Mursito, Anggoro Nadhirah Seraphine Nadhirah Seraphine Nana Sulaksana Nana Sulaksana Nana Sulaksana Nendi rohaendi NINGRUM, WIWIN JUNITA Noorika Retno Widuri Pajrin, Ulfia Sari Pradnya Paramarta Raditya Rendra Putra, Rafino Kurnia Putri, Revena Denia Rachmad Setijadi Raden Irvan Sophian Rahayu Robiana, Rahayu Rahmi, Nisa Shafira Muthia Ramsof, Rani Amalia Retnoningtyas, Widya Ika Reynara Davin Chen Ridwan Banda Rina Devnita Rizky Narendra Utomo, Rizky Narendra Rukmana, Yanwar Yusup Rulina Rachmawati Sabila, Zahra Syahida Seraphine, Nadhirah Seru, Imanuel Seru, Imanuel Shafira, Nisa Siahaan, Yakub Sidarto Sidarto Sihotang, Josua Washington Sondi Kuswaryan Sulastri, Murni Sumarnadi, Eko Sumaryono Sumaryono Tati Andriani Taufiq, Mochamad Muslim Tono Hartono, Tono Tupan Tupan Ujang Hidayat Tanuwiria Ulhaque, Thaha Rizal Vijaya Isnaniawardhani Wicaksana, Kintan Adelia Arum Wicaksono, Danny Wiguna, Purwa Wiyatno Haryanto Yanwar Yusup Rukmana Yanwar Yusup Rukmana Yogi Prianda, Yogi Yohanes Tan, Yohanes Yuda, Himmes Fitra Yudhicara Yudhicara Yusi Firmansyah, Yusi Yusuf, Muhammad Farhan Yuyun Yuniardi

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