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All Journal Jurnal Rekayasa Jurnal Rekayasa Sipil dan Desain Khasanah Ilmu - Jurnal Pariwisata Dan Budaya Spatial : Wahana Komunikasi dan Informasi Geografi Journal of Innovation and Technology Warta AKAB Cendekia: Jurnal Ilmu Sosial, Bahasa dan Pendidikan E-JRM Al-Khidmah: Jurnal Pengabdian Kepada Masyarakat Kegiatan Positif : Jurnal Hasil Karya Pengabdian Masyarakat Jurnal Ilmiah Research Student Indonesian Journal of Environment and Sustainability Issues Menulis: Jurnal Penelitian Nusantara
Ahmad Zakaria
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Religion Humanities Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Earth & Planetary Sciences Economics, Econometrics & Finance Education Electrical & Electronics Engineering Energy Environmental Science Health Professions Industrial & Manufacturing Engineering Languange, Linguistic, Communication & Media Materials Science & Nanotechnology Mathematics Mechanical Engineering Medicine & Pharmacology Social Sciences Other

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Stabilisasi Tanah Lempung yang Dicampur Zat Additive Kapur dan Matos Dtinjau Dari Waktu Perendaman I Komang Tri Herdiana; Iswan Iswan; Ahmad Zakaria
Jurnal Rekayasa Sipil dan Desain Vol 6, No 1 (2018): Edisi Maret 2018
Publisher : Jurnal Rekayasa Sipil dan Desain

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In order to obtain a good, strong and sturdy foundation layer, good soil carrying capacity is required.  In addition, the soil also serves to support the foundation of a civil construction such as buildings and pavement. Therefore it is necessary to do soil improvement for soil types that have low carrying capacity. In this final project, a research on high plasticity clay soil is taken from Sidorejo area, Sidomulyo district, South Lampung to find CBR value with variation of immersion time.  From this research, we can see the change of CBR value with immersion variations that have been done for 4, 5, 14, and 28 days.From the research conducted in the Laboratory of Soil Mechanics of Lampung University , it is known that the soil originating from Sidorejo area, Sidomulyo District Southern Lampung is classified into A-7-5 clay soil which has a soil bearing capacity value of 7%.  After the improvement of soil with lime additive substances with optimum content of 12% and 3,472 gr of matos stabilizer which is then done with immersion test with a duration of 4, 5, 14 and 28 days, the value of CBR is 24% at 4 days, 22% at 5 days, 15.6% at 14 days and 9% at 28 days.  The value of CBR obtained tends to decrease as the duration of immersion is increased, so it can be concluded the duration of immersion greatly affects the size of soil bearing capacity.
Pengujian CBR Laboratorium Mengggunakan Metode Tekanan (Pressure Method) untuk Tanah Timbunan Berdasarkan Energi Pemadatan Dwi Winda Sari; Idharmahadi Adha; ahmad zakaria
Jurnal Rekayasa Sipil dan Desain Vol 7, No 1 (2019): Edisi Maret 2019
Publisher : Jurnal Rekayasa Sipil dan Desain

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 In building a construction related to the physical condition of the soil, this is because the land It is one of the very material plays an important role in supporting such a construction.Then had to do the testing power support basic land (subgrade) with experimental study testing the California Bearing Ratio (CBR) method of pressure (pressure method) based on the energy compaction. The research using a sample of the soil that came from the area of Tirtayasa, Kec.Sukabumi, Bandar Lampung for land fill. Implementation testing of CBR compactor modification press tool with using three soil samples at each pressure.The pressures used for CBR standard is 0,10 MPa, 0,26 MPa and 0.58 MPa. And for testing using pressure modified CBR 0.437 MPa,1,19 MPa and 2,63 MPa. The results of the research in the laboratory showed that the weight of the maximum volume (γdmaks) of 1.68 g/cm3 of standard proctor method.While of modified proctor testing the the weight of the maximum volume (γdmaks) of 1.77 gr/cm3. Based on the results of testing the value of CBR standard and modified methods of compared that the laboratory testing higher than the CBR based on compaction energy with press modifications. Keywords : CBR, Compaction Energy Tool press the Compactor Modification 
Kebutuhan Material Jaringan Jalan Provinsi di Provinsi Lampung tahun anggaran 2016 wilayah 1 dan 3 Muhammad Hendro Prawaka; Yohanes Martono Hadi; Ahmad Zakaria
Jurnal Rekayasa Sipil dan Desain Vol 5, No 1 (2017): Edisi Maret 2017
Publisher : Jurnal Rekayasa Sipil dan Desain

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This study was conducted to asses the material requiermens for provincial network in Lampung in budget year 2016 to obtain the results for the following year.From the calculation of material needs of Lampung province road workfor region 1 and 3 in 2016, it shows a considerable need for asphalt, cement, sands, stone. From the calculation analysis of government tendency to apply tender pattern is quite late. And giving impact on the latency of material supply needs of road works in Lampung Province.However, to meet the material needs of Lampung Province road works is quite good. Considering its fulfilled the smooth supply needs to meet the material recuirements.Keywords : material recruitmen, road networks, Lampung province
ANALISIS SEDIMEN TRANSPOR SUNGAI WAY SANGARUS (HULU BENDUNGAN BATUTEGI) MENGGUNAKAN PENDEKATAN EMPIRIS Faishal Muhammad Hanun; Endro Prasetyo Wahono; Ahmad Zakaria
Jurnal Rekayasa Sipil dan Desain Vol 8, No 2 (2020): Edisi Juni 2020
Publisher : Jurnal Rekayasa Sipil dan Desain

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Bendungan Batutegi adalah bendungan terbesar di Asia Tenggara yang memiliki peran penting dalam perkembangan provinsi lampung. Way Sangarus merupakan salah satu hulu sungai bendungan batutegi yang mengalir sepanjang tahun, yaitu merupakan sungai dengan debit yang besar dan sangat penting dalam suplai air menuju tampungan bendungan. Sedimentasi Sungai akan menjadi masalah yang serius apabila tidak dikontrol dengan baik. Sedimentasi pada bendungan batutegi menyebabkan pendangkalan dan berkurangnya kapasitas tampungan waduk bendungan. Maka diperlukan penelitian mengenai analisis angkutan sedimen untuk mengetahui berapa sedimen yang oleh dibawa hulu sungai menuju waduk bendungan. Tiga pendekatan empiris yang dipilih ialah: Meyer Peter and Muller, Einstein, dan Leo Van Rijn, yang digunakan untuk menganalisis laju transpor sedimen. Data hujan dengan rentang waktu 2011-2016 digunakan dalam analisis curah hujan. Curah hujan dengan prediksi 50% menggunakan metode Weibull. Debit dari curah hujan yang dipilih kemudian dianalisis dengan menggunakan metode rasional. Laju sedimen tahunan dari sungai sebesar 331.318,0 m3 , 2.404.701,0 m3 , dan 448.175,51 m3 secara berurutan metode pendekatan Meyer Peter and Muller, Einstein, dan Leo Van Rijn.Kata kunci : Angkutan Dasar, Angkutan Sedimen, Volume Sedimen, Meyer Peter and Muller, Einstein, Leo Van Rijn.
Pengaruh Interval Waktu Data Curah Hujan dalam Analisis Intensitas Durasi Frekuensi di Provinsi Lampung Mardiyansyah Mardiyansyah; Ahmad Zakaria; Dyah Indriana Kusumaastuti
Rekayasa : Jurnal Ilmiah Fakultas Teknik Universitas Lampung Vol 23, No 2 (2019): Edisi Agustus 2019
Publisher : UNIVERSITAS LAMPUNG

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in a reservoir or river, it is necessary to know the size of the flood discharge plan used as a basis for calculating the size of the canals and their complementary buildings. Troubleshooting using Hydrological analysis, Intensity Duration Frequency (IDF) requires frequency analysis using a series of data obtained from rain data records. The scope of this research covers the area of Lampung Province, namely BMG Radin Inten II station and BMG Maritim Panjang station. From the comparison of the IDF curve analysis between rainfall data for short time intervals and daily rainfall data, the percentage difference between rainfall intensity differences in each duration and at certain return periods is obtained. IDF Curve Analysis for Daily Rain Data uses the Mononobe method, from the results of IDF curve analysis between rainfall data for short time intervals with daily rainfall data at BMG Radin Inten II station there is a difference in the ratio of high intensity up to 3 times or > 300%, whereas in BMG Maritim Panjang station only the difference in ratio > 100%.
Sampul muka Jurnal Rekayasa Edisi Desember 2014 Ahmad Zakaria
Rekayasa : Jurnal Ilmiah Fakultas Teknik Universitas Lampung Vol 18, No 3 (2014): Edisi Desember 2014
Publisher : UNIVERSITAS LAMPUNG

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Sampul muka Jurnal Rekayasa Edisi Desember 2014
Daftar Isi Jurnal Rekayasa Edisi Agustus 2010 Ahmad Zakaria
Rekayasa : Jurnal Ilmiah Fakultas Teknik Universitas Lampung Vol 14, No 2 (2010): Edisi Agustus Tahun 2010
Publisher : UNIVERSITAS LAMPUNG

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Daftar Isi Jurnal Rekayasa Edisi Agustus 2010
The influence of el nino and la nina on rainfall data of east lampung regency, lampung province Rama Dian Gani; Ahmad Zakaria; Dyah Indriana Kusumastuti
Jurnal Rekayasa Sipil dan Desain Vol 9, No 2 (2021): Edisi Juni 2021
Publisher : Jurnal Rekayasa Sipil dan Desain

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This research was conducted to determine the impact of the areas where El Nino and La Nina were the most dominant. The data used in this study are daily rainfall data in 5 rain stations located in East Lampung. Data length from 1989 to 2018 at each station, this data was taken from the Mesuji River Basin - Sekampung (BBWSMS). This modeling is carried out using a data length of 30 years for a data term of 10957.By using observational data and applying it in 2 programs, namely the Fast Fourier Transform (FFT) and the Lomb Periodogram, it produces values that can be graphed for the spectrum of each of the 5 rain station areas, namely Jepara Lake, Labuhan Ratu, Taman Negeri, Kota Raman and Sri Gading. From the results, it can be seen which areas are predominantly affected by El Nino and La Nina. Based on the results of the two programs, both show that the rain station in the Lake Jepara area experiences more dominant El Nino and La Nina influences. Keywords: El Nino, La Nina, rain station, rainfall, Fast Fourier Transform, Lomb Periodogram
Penggunaan Pasir Seragam pada Perbaikan Subgrade Ditinjau Terhadap Tebal Perkerasan Jalan (Swelling Potential dan Non Swelling Potential) Ayu Ning Trias Pratiwi; Iswan Iswan; Ahmad Zakaria
Jurnal Rekayasa Sipil dan Desain Vol 9, No 2 (2021): Edisi Juni 2021
Publisher : Jurnal Rekayasa Sipil dan Desain

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Subgradeis the most important part to be used as the focus and support of all construction loads that are on it. If the subgrade is clay soil that has a low carrying capacity and is very sensitive to moisture content, then nearby buildings will often suffer damage, such as land located in Marga Kaya Village. In this study using the method of mixing native soil with stabilization material in the form of uniform sand derived from Mount Sugih with a mixture variation of 5%, 10% and 15% of the dry weight of the soil. The test results showed cbr unsoaked and soaked maximum occurred in sand mixture 15% with CBR Unsoaked value of 13.2% and CBR Soaked with a value of 2.9%. Road pavement thickness on CBR Unsoaked and Soaked efficiently on sand mixture 15% with thickness D1 = 2.75 cm, D2 = 20 and D3 = 10 cm, and CBR Soaked with thickness D1 = 8.75 cm, D2 = 20 cm and D3 = 10 cm. The value of swelling decreased from 11.4% to 7.4% in the addition of uniform sand by 15%. DDT value is influenced by cbr value the greater cbr value then DDT will increase.
Analisis Kinerja Redaman Gelombang pada Breakwater Tenggelam Tipe Berlubang Dengan Pemodelan Fisik 2D Ivana Aprili Andika; Subuh Tugiono; Ahmad Zakaria; Endro P. Wahono
Jurnal Rekayasa Sipil dan Desain Vol 9, No 1 (2021): Edisi Maret 2021
Publisher : Jurnal Rekayasa Sipil dan Desain

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Loss of land due to coastal erosion that occurs naturally by wave abrasion. Therefore, to protect the coast from erosion or other matters, a breakwater is needed which destroys the energy of the waves before reaching the shore. This is the background of the author in taking the title of the thesis about the Performance Analysis of Wave Attenuation in the Hollow Type Breakwater Submerged Type 2-D Physical Modeling. The variables used in this study were incident wave height (Ho), calm water level (ds), and breakwater type. The results of this study indicate that the damping coefficient (Cr) was obtained using a sinking breakwater without a hole with a calm water level (ds) of 2 cm of 0.479 which is the most effective damping produced in an experiment using a breakwater that is free from calm water surface (ds). 2 cm. The wave attenuation obtained from the wave defraction test using 2 types of breakwaters resulted that the breakwater without the damping hole was greater than using a perforated breakwater.
Co-Authors . Sumiharni Adira Salsabila Agus Ari Prasetyo Ahmad Herison Ahmad Labib Husain AHMAD MUZAKKI Al Arif Febrian Amanda Urmilatus Sifana Amelia Nurul Damayanti Anggun Dwi Cahyani Fitri Annika Lukitawati Annisa Delia Putri Annisa Putri Dwi Septiansari Ardelia Zahirah Rahman Arif Dinaryoko Arya Jaya Sumbahan Ashfiya Salsabila Ashruri Ashruri Ashruri Aynuddin Aynuddin Ayu Ning Trias Pratiwi Badruzzaman Aji Bagus Mustofa Purna Bramesvara Arizona Brigitha Cindy Sitanaya Ciek Julyati Hisyam Damar Adi Perdana Datra Peta Saputra Dian Mira Fadela didit kuswadi kuswadi Dwi Joko Winarno Dwi Winda Sari Dwijoko Winarno Dyah Indriana Kusumastuti Dyah Kusumastuti Eko Adi Saputra Endro P Wahyono Endro Prasetyo Wahono Erizal Tanjung Esty Handayani Fachrurrazie Fachrurrazie Fadli Imran Faishal Muhammad Hanun Faizah Fajar Destri Atmoko Fajar Hartantio Fanny Prawaka Farah Ahista Rahma Fitri Trisdiana Fuad Zikri Gatot Eko Susilo Geleng Perangin Angin Gita Putri Sadelina Giwa Wibawa Permana Haifa Muthi Hilma Lia Irfani I Iswan I Komang Tri Herdiana Ibnu Tuhu Pangestu Idharmahadi Adha Ikhfan Kurniyawan Irlin Safira Irvan Tegar Cesar Irwani Ninik Wijaya Iswan Iswan Ivana Aprili Andika Khansa Fay’i Safira Lintang Kurnia Aridini Lodewick Manurung Lovina Hasianna Tampubolon Lusmeilia Afriami Lusmeilia Afriani M Lucky Apriansyah Nawawi M Rizky Ismail M. Fahmi Rinaldi M. Haviz Mardiana Mardiana Mardiyansyah Mardiyansyah Margareta Welly Mariyanto Mariyanto Mesya Ashilah Miftahul Khoiri Muhammad Hendro Prawaka Muhammad Ijlal Ghaly Muhammad Naufal Agatha Muhammad Nur Kholiq Muhammad Sohib Muhammad Zaenal Arifin N. Rachma Nabilah Destin Amelia Nency Dwi Kusanti Nur Arifaini Ofik Taufik Purwadi Ofik Toupik Purwadi Panca Kurniawan Pusaka, Semerdanta Putri Mardiyanti Rahayu Sulistyorini Rama Dian Gani Rifki Ananda Saputro Riki Chandra Wijaya Riko Berli Ardian Rinaldi Pelawi Rini Puji Astuti Rio Dwi Septian Risdha Sagita Razak Rizki Lazuardi Prasetio Rizki Prinanda Umar Rizky Akhmad Dhani Rizqi Kurniawan Salman Farizi Sandy Kusuma Setyanto Setyanto Shelly Isya Ramadhani Sindu Abadi Sampurna Siti fitriatus Sholikhah4 Siti Khofidatur Rohmah Siti Nurul Khotimah Subuh Tugiono Sumiharni Sumiharni Suyadi Suyadi Syah, Aminudin Teguh Priadi Titik Ayuningsih Tri Budi Wibowo Tri Subakti Trisno Imany wahyu hadi kuncoro Wittri Djasmasari Yohanes Martono Hadi Yohannes Martono Hadi Yuda Romdania Yuda Romdania