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Efisiensi Hidrodinamis Pemecah Gelombang Tegak Komposit Balok Kotak Dan Tiang Pancang Dengan Pengisi Batuan Frans Rabung; M. Saleh Pallu; M. Arsyad Thaha; A. Bakri Muhiddin
Rekayasa Sipil Vol 6, No 2 (2017)
Publisher : Universitas Mercu Buana

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Abstract

Sebagai negara kepulauan yang memiliki pantai terpanjang didunia, Indonesia membutuhkan banyak pemecahgelombang (termasuk groin dan revetment) tidak hanya untuk melindungi pantai dari penggerusan tetapi jugademi menjaga ketenangan air di kolam pelabuhan untuk manuver kapal dan operasi bongkar-muat. Akan tetapi,sampai sekarang di Indonesia, banyak konstruksi pemecah gelombang dan revetment tidak memperhatikan teknikpantai dan manajemen dengan baik. Ada banyak pemecah gelombang, groin dan revetment yang telah dibangununtuk melindungi pantai-pantai yang kritis, tetapi perencanaan dan konstruksi tidak profesional sehingga merekatidak bertahan lama. Contoh terdekat adalah Pantai Tanjung Bunga, Makassar. Beberapa groin yang dibangun diPantai Akkarena rusak hanya dalam beberapa tahun. Sebuah pemecah gelombang yang terbuat dari silindersilinderbeton, runtuh sebelum selesai. Penyebab kelangkaan pembangunan pemecah gelombang (yang baik)adalah biaya tinggi yang dibutuhkan akibat kesulitan bekerja di laut dan kebutuhan material (yang memenuhisyarat) yang sangat banyak. Studi ini mencari jalan keluar berupa pemecah gelombang (vertikal) yang terbuatdari balok-kotak, tiang-pancang dan pengisi beton. Telah diketahui bahwa pemecah gelombang gundukan batuadalah yang paling efektif meredam energi gelombang (baik transmisi maupun refleksi), dan bahkan setelahruntuh pun masih dapat berfungsi; dengan sedikit perbaikan pada kerusakan, ia akan berfungsi lagi semakin baik.Persoalan utama adalah kebutuhan material yang sangat banyak, dan sebahagian harus dalam ukuran besar.Material ini biasanya diperoleh dari peledakan gunung-gunung batu yang berkualitas baik (SG > 2.7), hal yangsekarang sulit dilakukan karena issue lingkungan. Dengan pemecah gelombang vertikal, ukuran dan jumlah batuyang dibutuhkan sangat berkurang.
Sosialisasi Aplikasi Teknologi Building Information Modelling (BIM) pada Sektor Konstruksi Indonesia Fakhruddin -; Herman Parung; Muhammad Wihardi Tjaronge; Rudy Djamaluddin; Rita Irmawaty; Andi Arwin Amiruddin; Abdul Rahman Djamaluddin; Tri Harianto; Achmad Bakri Muhiddin; Ardi Arsyad; Sitti Hijraini Nur
JURNAL TEPAT : Teknologi Terapan untuk Pengabdian Masyarakat Vol 2 No 2 (2019): Aplikasi Teknologi untuk Hidup Masyarakat yang Lebih Baik
Publisher : Faculty of Engineering UNHAS

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (896.338 KB) | DOI: 10.25042/jurnal_tepat.v2i2.82

Abstract

Building Information Modelling (BIM) adalah sebuah pendekatan untuk desain bangunan, konstruksi, dan manajemen. Software Tekla merupakan revolusi baru dalam bidang rekayasa struktur yang memiliki beberapa keunggulan dibanding program aplikasi lainnya. Tekla Structures merupakan perangkat lunak Building Information Modelling (BIM) yang memungkinkan untuk membuat dan mengelola data secara akurat dan rinci, serta dapat membuat model struktur 3D tanpa melupakan material dan struktur yang kompleks. Penggunaan BIM di Indonesia masih hanya sebatas menjawab persoalan bagaimana mengefisiensikan kebutuhan tenaga kerja, waktu dan uang. Jika kita berkaca pada bagaimana pengaplikasian metode BIM di negara lain, potensi yang dicapai dari pengaplikasian metode BIM di Indonesia masih jauh dari kata maksimal. Tantangan selanjutnya adalah bagaimana mengenalkan teknologi aplikasi BIM ini dan mendorong penerapan BIM ini ke seluruh pihak stakeholder sektor konstruksi yang terkait. Maka dari itu, kegiatan pengabdian pada masyarakat ini bertujuan untuk memberikan pengenalan tentang Building Information Modelling dan memberikan keterampilan dasar dalam penggunaan aplikasi teknologi BIM dengan software Tekla Structures. Kegiatan ini dilaksanakan di Departemen Teknik Sipil, Universitas Hasanuddin yang dihadiri oleh 35 peserta yang berasal dari kalangan praktisi dan akademisi. Tahapan kegiatan pengabdian meliputi kegiatan sosialiasi ke stakeholder melalui mitra Lembaga Pengembangan Jasa Konstruksi Provinsi Sulawesi Selatan (LPJKP Sul-Sel), pengumpulan data berupa shop drawing, pembuatan modul, pemodelan dan laporan berupa quantity dan gambar kerja.
Sosialisasi Mitigasi Bencana pada Daerah Rawan Longsor Achmad Bakri Muhiddin; Nur, S. H; Harianto T; Djamaluddin R; Arsyad A; Suprapti A
JURNAL TEPAT : Teknologi Terapan untuk Pengabdian Masyarakat Vol 4 No 2 (2021): Community Empowerment through Health Awareness in the New Normal
Publisher : Faculty of Engineering UNHAS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25042/jurnal_tepat.v4i2.191

Abstract

Landslide vulnerability at several locations in South and West Sulawesi requires inspection and evaluation because of the failure of retaining wall structure. Some of the damage that occurs needs to be handled with technical evaluation and back analysis to find out the mechanism of the failure through site investigation, data observation from stakeholders. The main purpose of this study is to discuss and facilitated information about retaining wall design to withstand the burden and avoid repeating similar disaster in the next projects. From observations and field facts, the collapse of retaining wall is caused by the dimensions of retaining wall that are too slender so that they are unable to withstand active soil pressure when saturated soil. Retaining walls drainage does not work properly so the soil is easily saturated when it rains. The collapse was caused by the collapse of the wall and the eroding of the retaining wall foundation due to the intrusion of water in the horizontal crack at the meeting of the shoulder of the road and the retaining wall. Disaster risk management begins with the assessment and mapping of disaster risks. Learning to the community and construction service actors in disaster-prone areas is done intensively in order to be able to visually assess the threat. Mitigation efforts are more effective with disaster risk reduction investigations in the form of the implementation of early warning systems that allow relevant parties to detect early damage and make repairs before greater damage occurs.
Compressive Strength Characteristics of Trass Stabilized Dredged Soil Komang Arya Utama; Tri Harianto; Achmad Bakri Muhiddin; Ardy Arsyad
Journal of the Civil Engineering Forum Vol. 8 No. 3 (September 2022)
Publisher : Department of Civil and Environmental Engineering, Faculty of Engineering, Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/jcef.3463

Abstract

Landslides from Mount Bawakaraeng caldera in 2004 has caused high dam sedimentation at the lower reaches of the Jeneberang River. The availability of this large sedimentary material makes this material need to be considered as an alternative to new materials in the geotechnical field. However, the results of laboratory tests applied to sedimentary materials show that the mechanical characteristics of these materials are not sufficient for construction materials. Therefore, it is very important to conduct a study on how to improve the quality of dredged soil by adding Trass as stabilizing agent to improve the quality of the mechanical properties of the dredged soil. This study aims to analyze the mechanical characteristics of the dredged soil stabilized with Trass. The research was conducted by adding Trass with composition 3%; 6%; 9% and 12%; respectively to the dry weight of the dredged soil. The curing time was applied for a period of 3, 7 and 14 days to analyze the significant binding of Trass to the stabilized dredged soil. Laboratory tests was conducted to the density test and unconfined compression test. The results showed that there was an increase in the maximum dry density of the dredged soil between 1.41% - 3.56% due to the addition of trass, and a decrease in the optimum water content between 0.8% - 2.7%. In addition, there was an increase in the value of free compressive strength from 47.76% to 388.89% in the trass stabilized dredged soil during the curing period of 3, 7 and 14 days. The use of dredged soil and trass as stabilizing agent can be an alternative option in soil improvement efforts based on the utilization of waste material and local content potential.
Stability of Trash Trap Design in Various River Estuary Hairullah Hairullah; Tri Harianto; Achmad Bakri Muhiddin; Upe Zahra
Lowland Technology International Vol 24 No 3 (2023): Lowland Technology International Journal
Publisher : International Association of Lowland Technology

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.0001/ialt_lti.v24i3.1610

Abstract

In Indonesia, the most serious issue is garbage. As a result, with a total waste of 1.92 million tons, it has been named the number two contributor of plastic waste to the sea. Garbage disposal in the river can be harmful to downstream residents, especially fishermen. Because of the accumulation of garbage in the riverbed, the river becomes very shallow, causing the water to overflow when it rains, which can cause flooding. The goal of this final project is to design superstructure and substructure dimensions and reinforcement. To reduce waste entering the sea, trash traps are built in estuaries by filtering surface waste. The Floating Trash Trap model, as well as its dimensions and sizes, is the scheme and design of the planned trash trap. The focus of the superstructure is on the control of steel profiles and bolt anchors, while the focus of the substructure is on the foundation. SAP 2000 software was used for structural design analysis. The superstructure design results were safe for all existing loading combinations.
Unit Weight of Foam Concrete Containing Blended Cement and Fly Ash Sunarno, Yohans; Tjaronge, M. W.; Irnawaty, Rita; Muhiddin, Achmad Bakri
Jurnal Teknik Sipil dan Perencanaan Vol 24, No 1 (2022)
Publisher : Universitas Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/jtsp.v24i1.34664

Abstract

Abstract. The rapid development of construction and infrastructure results in increasing demands for natural resources continue. One of the many natural elements required for construction and infrastructure activities was cement, which is the basic ingredient in concrete. This study aims to analyze the unit weight of foam concrete containing blended cement and fly ash. The research approach used in this study was a laboratory experiment. Foam concrete was produced using 4 variations of cement (OPC, PCC-T, PCC-B and OPC+FA), fine aggregate, water and foam. The shape of the test object used was cube with a size of 15 cm × 15 cm × 15 cm. Unit weight test was used to evaluate the foam concrete mixture produced at the age of 3, 7, 28 and 730 days. The results showed that the unit weight of foam concrete in all variations of the specimens: OPC, PCC-T, PCC-B and OPC+FA, met the requirements for the unit weight of lightweight structural concrete based on SNI 03-3449-2002 and ACI 213R3 which was between 800 to 1400 kg/m3.
Stabilization of Sedimentary Soil with Cement-EPS on Direct Shear Strength Value Suyadi Suyadi; Nurul Marfuah; Achmad Bakri Muhiddin; Kartika Sari; Shafwan Monanda
Lowland Technology International Vol 24 No 2 (2022): Lowland Technology International Journal
Publisher : International Association of Lowland Technology

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.0001/ialt_lti.v24i2.1614

Abstract

Sediment is material resulting from the erosion process that settles in waterways, rivers and reservoirs. Excessive sedimentation at the bottom of the reservoir will reduce the effective volume of the reservoir which will affect the design life of the reservoir or the service life of the reservoir (siltation). The sedimentation events that occurred in the Bili-bili Reservoir are increasingly worrying because they can criticize the continued functioning of the reservoir. This is a problem that really needs to be taken seriously so that it doesn't have an impact in the future. So, a study is needed on reservoir sedimentary soils Bili-bili to determine the physical and mechanical properties of the soil, This study aims to determine the characteristics of the sedimentary soil used, the effect of adding a variety of cement and EPS - cement and curing to the shear strength value of the soil on the test Direct Shear. The tests carried out were tests of physical properties and mechanical properties of the Bili-bili Reservoir sediment soil with mixed variations, namely the addition of 3%, 5%, 7% and 9% cement, to 0.5% and 0.75% EPS with a curing period of 7 days, 14 days and 28 days and from the results of the study, it was found that the addition of cement to sedimentary soils can increase the specific gravity value and decrease the plasticity index of the soil, where cement can be used as a material for silt soil stability and the silt soil shear strength increases in line with the addition of cement content and increasing curing days.
Determining The Depth of Hard Soil Layers Using Geoelectric Resistivity and Cone Penetration Test Methods (Case Study: Kelurahan Bontoramba Kecamatan Somba Opu Kabupaten Gowa) Nurhasanah, Nurhasanah; Muhiddin, Achmad Bakri; Djamaluddin, Abdul Rahman; Niswar, Muhammad
JIPF (Jurnal Ilmu Pendidikan Fisika) Vol 9, No 1 (2024): January 2024
Publisher : STKIP Singkawang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26737/jipf.v9i1.4853

Abstract

Hard soil layers can impact the loading, stability, and behavior of structures in the geotechnical field. Comprehensive understanding of the depth and properties of hard soil layers can aid in designing suitable structures. Therefore, this study employed the resistivity geoelectric and Cone Penetration Test (CPT) methods to map the features of hard soil layers. Resistivity data were acquired through measurements utilizing the geoelectric method, while data on cone resistance, shear resistance, and friction ratio were gathered through field measurements using the CPT tool. The collected data was analyzed comprehensively to obtain a complete understanding of soil conditions. Based on resistivity values, the results indicated the research site comprises alluvium, very dry clay, and dry sandy soil. Based on the CPT test, it is determined that the layers contain mixtures of fine-grained soils, clay, silt, and sand. Therefore, it can be inferred that the dense sand lithology constitutes the hard soil layer geologically. The employment of both approaches delivers supplementary details on soil features and depth.
Pengaruh Waktu Pemeraman dan Gradasi Zeolit terhadap Kuat Tekan Bebas Tanah Laterit Stabilisasi Zeolit Aktivasi Waterglass Tangkeallo, Marthen M.; Samang, Lawalenna; Djamaluddin, A.R.; Muhiddin, Achmad Bakri
Prosiding Seminar Nasional Teknik Sipil UMS 2019: Prosiding Seminar Nasional Teknik Sipil UMS
Publisher : Universitas Muhammadiyah Surakarta

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Abstract

Pekerjaan tanah sangat fundamental pada infrastruktur sipil yang tergantung pada peruntukannya. Pengujian ini untuk mengetahui pengaruh waktu pemeraman dan gradasi zeolite terhadap nilai kuat tekan bebas tanah laterit stabilisasi zeolite aktivasi waterglas. Materialtanah laterit mengandung ±59,96% senyawa besi FeO berwarna merah bata kecoklatan .Bahan stabilisasi zeolite memiliki mineral kristal alumina silikat ±81,83% berpori terhidrat yang mempunyai mikrostruktur struktur kerangka 3-D tetrahedral, sedangkan waterglass atau sodium silikat adalah garam yang larut dalam air dengan komposisi sodium meta silikat. Stabilisasi dilakukan dengan 12% zeolit alam dan bergradasi #10, #40 dan #100 terhadap berat tanah dan waterglass sebesar 4% dari berat tanah. Spesimen diuji diperam 0, 7, 14, dan 28 hari. Hasil pengujian menunjukkan peningkatan nilai kuat tekan tanah laterit stabilisasi seolit dengan aktivasi waterglass meningkat sejalan dengan gradasi zeolite proporsional linear dengan meningkatnya gradasi. Hal ini mengindikasikan kapasitas dukung tanah laterit stabilisasi zeolite dengan aktivasi waterglass mengklasifikasikan 15 sampai 20 kali rasio peningkatan sebesar 15,74. 19,95 kg/cm2 pada masa peram 28 hari. Nilai kuat tekan gradasi 100 lebih tinggi dibandingkan dengan gradasi lolos saringan Nomor 10 dan 40.
Pengaruh Induksi Panas terhadap Nilai Kuat Tekan Bebas Tanah Lunak pada Zona Radial Panjaitan, Maraden; Samang, Lawalenna; Muhiddin, Achmad Bakri; Harianto, Tri
Prosiding Seminar Nasional Teknik Sipil UMS 2019: Prosiding Seminar Nasional Teknik Sipil UMS
Publisher : Universitas Muhammadiyah Surakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (614.615 KB)

Abstract

Problem utama pembangunan infrastruktur pada tanah lempung lunak (soft soil) adalah daya dukung tanah dasarnya yang relatif. Metoda perbaikan yang tersedia adalah preloading dengan cara Prefabricated vertical drain, electro- osmosis, vacuum consolidation, lightweight fill, stone column, jet grouting, lime columns, fracture grouting, ground freezing, vitrification, electrokinetic treatment dan electroheating. Dalam metode penelitian ini dilakukan preloading dengan kombinasi heating. Lokasi Pengambilan sampel tanah lunak di Takalar-Sulawesi Selatan. Tujuan dari penelitian ini mendapatkan nilai hubungan kuat tekan bebas (unconfined compression test) dan korelasinya dengan temperatur dan beban pada tanah lunak. Selanjutnya mendapatkan nilai pengaruh kuat tekan bebas pada zona radial akibat diinduksi panas. Pada pengujian ini membuat variasi suhu mulai dari 1000 C, 2000 C, 3000 C ,sampai dengan 4000 C dan dan beban 0,20 kg/cm. Sampel yang diuji UCT pada zona radial yang sudah dimodelkan dengan radius 10 ,20 cm, 30 cm, 40 cm. Metode unconfined compression test (UCT) dengan temperatur 4000 menunjukkan hasil kuat tekan bebas pada radial Ro/center sebesar 0,467 kg/cm2dan pada R1 sebesar 0,250 kg/cm2, R2 sebesar 0,155 kg/cm2.Pada suhu 2000 C menunjukkan Ro/center sebesar 0,247 kg/cm2dan pada R1 sebesar 0,154 kg/cm2, R2 sebesar 0,107 kg/cm2. Hasil grafik tersebut kecenderungan pada titik tertentu akan sama pada temperatur dan radia yabg berbedal .Pengujian pemodelan ini menghasilkan kuat tekan bebas yang dapat dipakai menjadi parameter model pondasi pada tanah lunak dan terapannya bisa dipakai pada pondasi.