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Zufialdi Zakaria -, Zufialdi Zakaria

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Civil Engineering, Building, Construction & Architecture Earth & Planetary Sciences Energy Environmental Science

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IDENTIFIKASI KEBENCANAAN GEOLOGI KABUPATEN CIANJUR, JAWA BARAT -, Zufialdi Zakaria
Bulletin of Scientific Contribution Vol 6, No 1 (2008): Bulletin of Scientific Contribution
Publisher : Fakultas Teknik Geologi Universitas Padjadjaran

Area of Cianjur Regency is represent the part of west Indonesian tectonic. Regional of west Indonesian tectonics is influenced by two plate, that is Indo-Australa and Eurasia, with plate boundary characteristic is Java Trench at south Java. Regional of Cianjur Regency have potency of geological hazard which need to attention from possibility of tsunami in south coast Java, until possibility of volcano eruption (Mt. Gede) in north region. Early warning system is required to various geology disaster referring to various project or activity which have developed or will expand.

EVALUASI LINGKUNGAN UNTUK FONDASI DI DAERAH LAPUKAN BREKSI VULKANIK, JATINANGOR, SUMEDANG, JAWA BARAT -, Zufialdi Zakaria
Bulletin of Scientific Contribution Vol 4, No 2 (2006): Bulletin of Scientific Contribution
Publisher : Fakultas Teknik Geologi Universitas Padjadjaran

Jatinangor consist of volcanic brecia and its weathered. This terrain as development area. This terrain is require some analysis to it land development, for example is foundation analysis. To anticipate of negative impact as effect of foundation failure, hence requireded by calculation of bearing capacity. Also required environmental analysis by Environmental Evaluation by identifying impact and also give environmental management instruction and also environmental monitoring that started with location of foundation at appropriate deepness. Monitoring herein can be done to condition of building (house, bridge, drainage, road, street, etc.).

KARAKTERISTIK SUNGAI DI SEKITAR WILAYAH RAWAN LONGSOR DAS CITANDUY -, Zufialdi Zakaria; -, Irvan Sophian; -, Febri Hirnawan
Bulletin of Scientific Contribution Vol 9, No 3 (2011): Bulletin of Scientific Contribution
Publisher : Fakultas Teknik Geologi Universitas Padjadjaran

Characteristics of the river basin in Citanduy landslide prone areas are showing behaviors that can be read via relationship of Suspended Load with discharge. Six rivers studied show different conditions in accordance with the conditions of landslide prone areas around it, also with the condition of each rock. Avalanche region is restricted to several zones of slope stability.Turbidity of the river with small to large are, respectively are S. Cilongkeang, S. Cibarengkok, S. Cilemahurug, S. Cikawung, S. Cinyirib, and S. Cidawolong.River with Sub-watershed wich the most eroded until the lightest on the upstream and the surrounding, respectively are S. Cilongkeang, S. Cilemahurug, S. Cibarengkok, S. Cikawung, S. Cidawolong, and S. Cinyirib.Based on statistical analysis with T-test, S. Cidawolong and S. Cinyirib were not significantly different. In exponential graphics, S. Cilongkeang & S. Cilemahurug, and S. Cibarengkok & S.Cikawung, visually show the same character, but on a statistical analysis with T-test are concluded that significantly different with  = 5%.

APLIKASI TEKTONIK LEMPENG DALAM SUMBER DAYA MINERAL, ENERGI DAN KEWILAYAHAN -, Zufialdi Zakaria
Bulletin of Scientific Contribution Vol 5, No 2 (2007): Bulletin of Scientific Contribution
Publisher : Fakultas Teknik Geologi Universitas Padjadjaran

Indonesian Region have the condition of complicated tectonic. Indonesian Archipelago is represent meeting of Pacific Plate and Indian-Australian Plate (in Eastern Indonesia), and also Eurasia Plate and Indian-Australia Plate (in Western Indonesia), and also smaller plate ( Caroline Plate and Philippine Sea Plate).Plate boundaries can be estimated by zone of active earthquake, zone of mass movement in mountain region, zone of volcanism, zone of magmatisme, and zone of hydrocarbon.Estimation of plate tectonic boundary is important to support an investigation and research of mineral resources, energy resources, and terrain resources can be predicted. On land resources study, plates tectonic boundary is most important to anticipate of geological disaster.

SIGAP GERAKAN TANAH, SISTEM INFORMASI GEOGRAFIS APLIKASI PENANGANAN GERAKAN TANAH -, Zufialdi Zakaria
Bulletin of Scientific Contribution Vol 9, No 1 (2011): Bulletin of Scientific Contribution
Publisher : Fakultas Teknik Geologi Universitas Padjadjaran

Sistem Informasi Geografis (SIG) merupakan perangkat informatif yang cepat dan mudah diakses setelah semua data informasi digabungkan ke dalam suatu perangkat lunak (soft-ware) komputer.Banyak manfaat yang didapat dari SIG ini. Aplikasinya dapat digunakan untuk bidang sosial, ekonomi, politik, budaya, maupun pertahanan dan keamanan. Selain itu, SIG tersebut juga bermanfaat bagi aplikasi penanganan bencana-bencana alam seperti bencana longsor (gerakan tanah), tsunami, gempa dan lain-lain, juga dalam penetapan kawasan rawan banjir (Sukiyah, et al., 2004).

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

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.

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

Co-Authors Agung Mulyo Dicky Muslim Edi Tri Haryanto -, Edi Tri Haryanto Febri Hirnawan -, Febri Hirnawan Geni Dipatunggoro -, Geni Dipatunggoro Irvan Sophian -, Irvan Sophian Ismawan - Iyan Haryanto -, Iyan Haryanto Luthfan H. Jihadi -, Luthfan H. Jihadi M. Bey Anural -, M. Bey Anural Raden Irvan Sophian -, Raden Irvan Sophian Sondi Kuswaryan Ujang Hidayat Tanuwiria Yuyun Yuniardi -, Yuyun Yuniardi

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