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All Journal REKA RACANA Jurnal Teknik Sipil JURNAL TEKNIK SIPIL ITP ISSN 2354-8452 Journal of Civil Engineering Civil and Environmental Science Journal (CIVENSE)
Teuku Faisal Fathani
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Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Education Engineering Environmental Science Transportation

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PENGARUH PEMANCANGAN FONDASI TIANG PADA TANAH LEMPUNG JENUH TERHADAP TEKANAN AIR PORI Gumbert Maylda Pratama; Agus Darmawan Adi; Teuku Faisal Fathani
Jurnal Teknik Sipil Vol. 14 No. 4 (2018)
Publisher : Program Studi Teknik Sipil Fakultas Teknik Universitas Atma Jaya Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (514.155 KB) | DOI: 10.24002/jts.v14i4.2004

Abstract

Abstract: Installation of driving pile foundation is causing excess pore water pressure on saturated clay. Experimental study of driving pile installation effect on clayey silt is conducted at laboratory scale through pore water pressure value observation. The pore water pressure value was read using pressure transducers and head-meters, which has been installed at different depth of the soil sample. The experiment was carried out on two different soil samples. Sample 1 requires 146 strokes to fully drive, and Sample 2 requires 50 strokes. The pore water pressure value was affected by pile penetration depth. The pore water pressure at the bottom of the sample is higher than pore water pressure at the top of the sample. Excess pore water pressure at the sample with more stroke numbers is greater than the sample with less stroke numbers. Pore water pressure change values at Sample 1 are 0,04 kg/cm2 at the top of the sample and 0,10 kg/cm2 at the bottom, while at Sample 2 are 0,02 kg/cm2 at the top of the sample and 0,06 kg/cm2 at the bottom.Abstrak: Pemancangan fondasi tiang mengakibatkan perubahan tekanan air pori pada tanah lempung jenuh. Pengujian pengaruh pemancangan pada perubahan tekanan air pori dilakukan melalui studi eksperimental menggunakan tanah lanau lempungan di laboratorium, dengan pembacaan perubahan nilai tekanan air pori. Pembacaan tekanan air pori dilakukan dengan alat pressure transducer dan head-meter yang dipasang pada variasi kedalaman tanah. Pengujian dilakukan pada dua sampel tanah yang berbeda. Pada Sampel 1 dibutuhkan 146 kali pukulan hingga tiang mencapai kedalaman rencana, sedangkan pada Sampel 2 dibutuhkan 50 kali pukulan. Nilai tekanan air pori dipengaruhi oleh kedalaman penetrasi fondasi tiang pada saat pembacaan. Nilai perubahan tekanan air pori di bagian bawah lebih tinggi dibandingkan perubahan tekanan air pori yang terjadi di bagian atas. Perubahan tekanan air pori lebih besar terjadi pada sampel dengan jumlah pukulan yang lebih banyak. Pembacaan perubahan tekanan air pori pada Sampel 1 bagian atas sebesar 0,04 kg/cm2 sedangkan bagian bawah sebesar 0,10 kg/cm2, pada Sampel 2 bagian atas sebesar 0,02 kg/cm2 sedangkan bagian bawah sebesar 0,06 kg/cm2.
HUBUNGAN HASIL KORELASI STRATIGRAFI BAWAH PERMUKAAN DENGAN KESTABILAN TEROWONGAN STUDI KASUS: TEROWONGAN MRT JAKARTA Luthfi Effendi; Teuku Faisal Fathani; Wahyu Wilopo
JURNAL TEKNIK SIPIL ITP Vol 5, No 1 (2018): Jurnal Teknik Sipil (JTS) ITP
Publisher : LP2M ITP

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (798.781 KB)

Abstract

perhitungan stabilitas terowongan, mengetahui kondisi bawah permukaan, jenis tanah dan parameternya merupakan hal yang sangat penting. Karena itu, korelasi data bor harus dilakukan sebaik mungkin agar dapat menggambarkan kondisi bawah tanah yang akurat. Penelitian ini akan menguji kestabilan terowongan MRT Jakarta stasiun bawah tanah Senayan-Istora. Berdasarkan hasil korelasi data bor, jenis tanah dibagi menjadi menjadi lima satuan tanah yang terdiri dari lempung N-SPT rendah, lanau N-SPT rendah, lanau N-SPT tinggi, pasir N-SPT rendah, dan pasir N-SPT tinggi. Tekanan muka terowongan divalidasi dengan pembacaan tekanan muka terowongan di lapangan. Secara umum metode yang paling mendekati hasil pembacaan di lapangan adalah metode COB Commisie L510. Stabilitas tubuh terowongan dihitung dengan metode Carranza-Torres, menghasilkan gaya yang paling besar 137,93 kN/m2 dari kapasitas dukung lining terowongan 726 kN/m2. Stabilitas terowongan terhadap gaya angkat menghasilkan faktor aman paling kecil sebesar 2,26 dari rekomendasi faktor aman 1,5. Hasil korelasi akan berdampak pada stabilitas terowongan, karena stabilitas terowongan didasarkan pada jenis, tebal dan kekuatan tanah di mana terowongan tersebut dibangun.Kata kunci: faktor aman, stratigrafi, terowongan
SEEPAGE AND SLOPE STABILITY ANALYSIS FOR SAFETY EVALUATION OF PIDEKSO DAM Ika Sakti Octaviarini; Teuku Faisal Fathani
Journal of Civil Engineering Vol 36, No 2 (2021)
Publisher : Institut Teknologi Sepuluh Nopember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j20861206.v36i2.11487

Abstract

The Pidekso Dam is one of the National Strategic Projects. The dam is located in Pidekso Village, Giriwoyo District, Wonogiri Regency, Central Java Province. The dam was designed as an earth-fill dam of zonal type with random fill and an upright core. Although the construction of a dam provides huge benefits, it may pose a potential hazard if collapses. Therefore, it is necessary to conduct a study to determine the safety of the Pidekso Dam in various conditions, including during an earthquake occurrence.The study analyzed the seepage on the main dam construction using Seep/W and dam-slope stability using Slope/W by reviewing the cross-section of the dam body and its foundation. The data used as the input in the analysis include the coefficient of soil permeability, soil cohesion, internal friction angle, and soil density based on field investigations and laboratory analysis. For the seepage analysis, manual calculations were also carried out using the Schaffernak and Casagrande method compared to the Seep/W results.From the results of the seepage analysis with Seep/W, the Pidekso Dam is safe against leakage with the largest discharge of 6.480×10-4 m3/s at maximum water level. The safety factor against piping showed safe results with the lowest safety factor of 6.295 at the end of the filter drainage. In the dam stability analysis with Slope/W, several unsafe conditions have the lowest safety factor of 0.926 on the upstream slope at the minimum water level with MDE (Maximum Design Earthquake) of 0.25. In Makdisi-Seed analysis, the highest slope displacement value is 0.862 m with an earthquake magnitude of 8.25; Y/H (Y is the depth from the top of the dam and H is dam height) of 0.25. This value is smaller than the maximum limit of 2.00 m, hence the dam is still in a safe condition.
Analisis Biaya Hidup Aset pada Infrastruktur Pengangkatan Air Baku di Daerah Karst Muhammad Luqman Nur Rouf Arifin; Teuku Faisal Fathani; Henricus Priyosulistyo
RekaRacana: Jurnal Teknil Sipil Vol 4, No 3: September 2018
Publisher : Institut Teknologi Nasional, Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26760/rekaracana.v4i3.20

Abstract

ABSTRAKKawasan karst Gunungsewu yang terbentang dari Kabupaten Gunung Kidul, Wonogiri hingga Pacitan memiliki banyak lembah kering dan mengalami kelangkaan air permukaan. Kekeringan melanda saat musim kemarau datang, sedangkan pada saat musim penghujan, umumnya air ditampung di penampungan air hujan (PAH) sederhana. Adanya program Pengangkatan Air Tenaga Surya (PATS) di beberapa lokasi di Kawasan karst Gunungsewu telah berhasil membantu warga dalam mengurangi masalah kekeringan. Penelitian ini menganalisis biaya hidup aset infrastruktur pengangkatan air baku menggunakan energi terbarukan (PATS) dan Pengangkatan Air Tenaga Diesel (PATD) di daerah karst. Lokasi yang dipilih adalah di Dusun Banyumeneng, Kabupaten Gunung Kidul yang mulai beroperasi tahun 2016. Analisis biaya hidup aset meliputi biaya awal, biaya perawatan dan perbaikan, biaya penggantian komponen dan biaya penghapusan. Hasil analisis nilai kini aset menunjukkan bahwa nilai pada akhir umur layan PATS Banyumeneng sebesar (+)Rp66.240.298,00 untuk penggunaan energi surya, dan (-)Rp30.997.539,00 untuk penggunaan energi diesel. Nilai positif pada hasil analisis biaya hidup aset PATS menunjukkan bahwa infrastruktur PATS Banyumeneng menguntungkan secara ekonomi untuk dibangun dan beroperasi menggunakan tenaga surya.Kata kunci: biaya hidup aset, pengangkatan air tenaga surya, pengangkatan air tenaga diesel, nilai kini asset, karst Gunungsewu ABSTRACTThe Gunungsewu karst area which stretches from Gunung Kidul Regency, Wonogiri to Pacitan has many dry valleys and experiences a scarcity of surface water. Drought occurs when the dry season comes, while during the rainy season, water is generally stored in simple rainwater storage (PAH). The existence of a Solar Water Pumping System (PATS) in several locations in the Gunungsewu karst area has succeeded in helping residents in reducing drought problems. This study analyzes the life cycle cost of water supply infrastructure using renewable energy technology (PATS) and diesel technology (PATD) in the karst area. The chosen location was in Banyumeneng Hamlet, Gunung Kidul Regency which began operations in 2016. Analysis of life cycle cost includes initial costs, maintenance and repair costs, replacement costs and salvage value. Present value of assets show that the value at the end of the service life of PATS Banyumeneng is (+)Rp66,240,298.00 for the use of solar energy, and (-)Rp 30,997,539.00 for the use of diesel energy. The positive value on the results of the PATS life cycle cost analysis shows that the PATS Banyumeneng infrastructure is economically profitable to build and operate.Keywords: life cycle cost, solar water pumping system, diesel powered water pumping system, present value of asset, Gunungsewu karst area
Comparison of SPT and Vs-based Liquefaction Assessment on Young Volcanic Sediment: A Case Study in Bantul District of Yogyakarta, Indonesia Amalina, Anisa Nur; Teuku Faisal Fathani; Wahyu Wilopo
Civil and Environmental Science Journal (CIVENSE) Vol. 5 No. 2 (2022)
Publisher : Fakultas Teknik Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/ub.civense.2022.00502.6

Abstract

On May 26, 2006, an earthquake of moment magnitude (Mw) 6.3 occurred in Yogyakarta. The damages found in Bantul were predicted to be caused by liquefaction. Moreover, liquefaction symptoms were found, such as a sand boil and lateral spreading. It inferred that the damage was controlled by the amplification factors from young volcanic sediments that are redeposited and altered volcaniclastics from the active Mount Merapi. This study compared subsurface conditions based on two field investigation methods (SPT and Shear Wave Velocity) and determined the liquefaction potential by considering groundwater and the region's seismicity. Several equations to represent the N-SPT and Vs data were also analyzed to obtain the most fitted equation. As a result, several equations used in this study were inadequate to properly correlate N-SPT and Vs. A comparison of safety factor values indicated that the liquefaction potential in the studied area on the Vs-based method is lower than the result from the SPT-based method.
Co-Authors Agus Darmawan Adi Amalina, Anisa Nur Gumbert Maylda Pratama Henricus Priyosulistyo Ika Sakti Octaviarini Luthfi Effendi Muhammad Luqman Nur Rouf Arifin Wahyu Wilopo