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All Journal INTEKNA Info-Teknik Panrita Abdi - Jurnal Pengabdian pada Masyarakat Jurnal Serambi Engineering Serambi Engineering
Yusti Yudiawati
Politeknik Negeri Banjarmasin
Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Earth & Planetary Sciences Economics, Econometrics & Finance Electrical & Electronics Engineering Energy Engineering Environmental Science Industrial & Manufacturing Engineering Other

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Kehandalan Daya Dukung Aksial Tiang Pancang Beton Segi Empat Berdasarkan Hasil SPT Dan PDA Yusti Yudiawati
INFO-TEKNIK 2016: Prosiding Semnas Teknik Sipil 2016
Publisher : Universitas Lambung Mangkurat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20527/infotek.v0i0.3067

Abstract

Besarnya  biaya  pondasi     sangat  ditentukan  pada  keputusan  saat  pemilihan  dimensi  tiang  pancang. Penentuan  dimensi  tiang  selain  didasarkan  oleh evaluasi  daya  dukung  tiang  berdasarkan  uji  tanah  perlu  sekali dievaluasi terhadap hasil-hasil uji tiang di lapangan untuk memastikan kehandalan daya dukung pondasi tiang yang dipilih. Selama ini para perencana lebih memilih menggunakan tiang bulat dibandingkan tiang persegi dengan alasan dianggap  lebih murah dan lebih handal daya dukungnya.  Kenyataan  di lapangan  membuktikan  tiang segiempat menghasilkan daya dukung tiang ultimit yang jauh lebih besar daripada tiang bulat sehingga dengan dimensi yang lebih kecil akan dihasilkan daya dukung ultimit yang setara dengan dimensi tiang bulat yang jauh lebih besar. Hasil uji PDA pada tiang 400x400 di Banjarmasin mencapai >400 ton atau 2,7 kali lebih besar daripada perkiraan daya dukung berdasarkan SPT sebesar 159,98 ton. Untuk daerah Banjarbaru hasil PDA test mencapai >300 ton atau 1,5 kali lebih besar dari perhitungan SPT sebesar 222.50 ton. Hasil uji PDA tiang 400x400 jika dibanding tiang diameter 400 memberikan hasil 3,2 kali lebih besar daya dukung ultimitnya. Daya dukung end bearing hasil PDA tes tiang diameter 400 setara dengan tiang 250x250. Hal ini tentunya akan sangat mengefisienkan jumlah titik pancang serta besarnya biaya pondasi.
Pondasi Dangkal diatas Tanah Lunak dengan Perkuatan Cerucuk Galam Berdasarkan Percobaan Lapangan Yusti Yudiawati; Ahmad Marzuki
INFO-TEKNIK Vol 9, No 2 (2008): INFOTEKNIK VOL. 9 NO. 2 2008
Publisher : Universitas Lambung Mangkurat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20527/infotek.v9i2.1755

Abstract

This research studying the behaviour of shallow foundation with cerucuk support. 1,0 m2 reinforced concrete square of shallow foundation model is used, with 5 cm of cerucuk diameter. The research is to find out the foundation ultimate bearing capacity with 1,0 m and 2,0 m length variety of cerucuk, the distance between the pile is 1/4B, 1/3B and 1/2B and also area covered with cerucuk is 1,0 m2, 2,0 m2 and 3,0 m2. To observe the settlement behaviour  is made with giving fixed load of 40%, 60% and 100% of ultimate load ratio at 1,0 m and 2,0 m cerucuk at the same area covered with cerucuk that is 2,0 m2. The result of research shows that the deeper the cerucuk is embedded, the distance between the pile is getting closer and the wider the area covered with cerucuk, the pile ultimate bearing capacity is bigger and the settlement is smaller. To decrease the settlement of shallow foundation, the fixed load that allowable must be < 40 % of ultimate load and Safety Factor must be > 2,5. 
Peningkatan Parameter Mekanis Tanah Lempung Plastisitas Tinggi sebagai Bahan Timbunan dengan Penambahan Kapur Yusti Yudiawati; Nur Fitriah
Jurnal Serambi Engineering Vol 7, No 4 (2022): Oktober 2022
Publisher : Fakultas Teknik

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32672/jse.v7i4.4925

Abstract

The clay plasticity can be reduced chemically using lime which contains Ca++ and Mg++ to neutralize the swelling and shrinkage properties. The test soil sample from Teluk Mesjid Village, Balangan Regency, has a 51% liquid limit, a 30.45% plastic limit and 20.55 Plastic Index, it is not specified as an embankment material. The lime percentage was based on plasticity test on soil mixed with 4%, 6% and 8% lime. Direct shear and independent compressive strength tests were carried out on the original soil samples and soil samples with addition of 6% lime resulting from standard and modified compaction as well as CBR tests for unsoaked and soaked conditions. The lime addition reduced the Plasticity Index greatly from 20.55% to 5.84% or to low plasticity category. Soil cohesion increased up to 100%. The shear angle increased was only 2-3°. The ultimate bearing capacity of the free compression test from modified compaction increased significantly up to 100%. The increase in CBR value in soaked conditions reached 59.6% to 63%. The soaked CBR value with lime addition increased from 7% to 17.4% or increased for 2.48 times.
Analisis Daya Dukung Fondasi Tiang Menggunakan Data SPT Dan PDLT Yusti Yudiawati; Muhammad Suhaimi
INTEKNA informasi teknik dan niaga Vol 22 No 02 (2022): Jurnal INTEKNA, Volume 22, No. 2, Nov 2022: 76 - 162
Publisher : P3M Politeknik Negeri Banjarmasin

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31961/intekna.v22i02.1359

Abstract

Pada proyek Bulking Station di Cempaga Hulu ini terdapat 3 tanki CPO dengan diameter tanki 24,1 m. Kapasitas dukung rencana fondasi tanki didapatkan dari analisa hasil pengujian tanah menggunakan coring menerus dan N-SPT. Direncanakan menggunakan minipile beton 25 cm x 25 cm dengan kedalaman tiang tertanam 31 m. Daya dukung tiang berdasarkan SPT sebesar  39,24 ton dan setiap Tanki terdiri dari 208 titik pancang. Saat pelaksanaan pemancangan hingga  kedalaman rencana ternyata hampir seluruh tiang tidak mendapatkan final set pemancangan yang seharusnya ditemukan pada kedalaman rencana, sehingga pemancangan diteruskan hingga kedalaman 33 m. Selanjutnya Uji PDLT dilakukan pada 8 titik uji pada setiap Tanki. Hasil uji PDLT rata-rata pada  Tanki 1 sebesar 37,29 ton; Tanki 2 sebesar 37,16 ton dan Tanki 3 sebesar 57,77 ton. Daya dukung kelompok tiang berdasarkan hasil PDLT rata-rata pada Tanki 1 sebesar 7.681,23 ton,  Tanki 2 sebesar 7.655,48 ton dan pada Tanki 3 sebesar 11.900,91 ton. Faktor Keamanan berdasarkan hasil PDLT rata-rata sebesar 1,71 pada Tanki 1 dan 2 serta 2,66 pada Tanki 3. Besar daya dukung fondasi rakit (raft foundation) tebal 75 cm sebesar 6,74 ton/m2 dan daya dukung pile-raft Tanki 1 sebesar 18,03 ton/m2  dan  Tanki 2 sebesar 10,85 ton/m2. Dengan syarat daya dukung pile raft sebesar 10 ton/m2 maka daya dukung pile-raft pada Tanki 1 dan Tanki 2  memenuhi persyaratan. Besar penurunan pile-raft fondasi Tanki 1 sebesar  6,89 cm dan Tanki 2 sebesar  7,30 cm atau < 15 cm maksimum penurunan yang diijinkan.
Perbaikan Kuat Geser Pasir Bergradasi Buruk dengan Penambahan Abu Cangkang Yusti Yudiawati; Muhammad Syawaluddin
Jurnal Serambi Engineering Vol 8, No 2 (2023): April 2023
Publisher : Fakultas Teknik

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32672/jse.v8i2.5973

Abstract

Based soil that does not meet technical requirements is a problem for construction executant in South Kalimantan. One of them is loose sand soil. Stabilization is carried out to improve the physical and mechanical properties of loose sand using palm shell ash waste. Sand samples were released from Bangkal village, Cempaka District, Banjarbaru. The study was conducted by adding palm shell ash to mixed variations of 0%, 5%, 10%, and 15%, to the weight of soil samples. And carried out physical and mechanical tests of the soil in the original condition and which was given a mixture of palm shell ash. The test resulted degradation in the specific gravity of the soil from 2.61 to 2.59 in 5% mixture, 2.58 in 10% mixture, and 2.56 in 15% mixture, the optimum moisture content from 15.46% to 2.08%, and the cohesion value from 0.107 kg/cm2 to 0.042 kg/cm2. It results an increase in dry fill weight from 1.47 gr/cm3 to 1.55 gr/cm3 and a shear angle value in the soil from 35.79° to 45.06°. The mixture of 15% is the optimal addition of palm shell ash that increases the shear strength of the soil.
BANTUAN DESAIN FONDASI MINIPILE MASJID KAPAL MUNZALAN BANJARBARU Yusti Yudiawati; Joni Irawan; Akhmad Marzuki; Ahmad Norhadi
Panrita Abdi - Jurnal Pengabdian pada Masyarakat Vol. 8 No. 2 (2024): Jurnal Panrita Abdi - April 2024
Publisher : LP2M Universitas Hasanuddin

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20956/pa.v8i2.31905

Abstract

Munzalan Ship Mosque in Banjarbaru is one of the branches of many Munzalan Ship Mosques which is found in various cities in Indonesia. This mosque is planned to have a four-story structure shaped similar to a ship and purple colored. The absence of experts in conducting soil investigations and foundation designing is the motivation for providing related services which will be used to fulfill one of the requirements for Building Approval (PBG) and Functional Conditions (SLF) by the Banjarbaru Government. The soil investigation was conducted in the form of a Cone Penetration Test (CPT) at 2 (two) locations, where the hard soil layer was found at a depth of 17 – 18 meters, so the foundation used was planned to be a rectangular minipile foundation with the dimension of 25 cm x 25 cm and a depth of 18 meters. The planned single pile load capacity is 255.48 tons and 291.54 tons. The resulting foundation requirements are 1 (one) pile at 11 joints, 2 (two) piles at 18 joints, and 3 (three) piles at 9 joints. Control calculations of the axial force of the structure show that the number of planned piles can support the load of the structure above it with SF > 1. Foundation design planning assistance facilitates the process of obtaining an optimal and efficient minipile foundation design. The surrounding community, management, and construction committee of the Kapal Munzalan Mosque gained knowledge and understanding of the building foundation design process.  ---  Masjid Kapal Munzalan Banjarbaru merupakan cabang dari Masjid Kapal Munzalan yang terdapat di berbagai kota di Indonesia. Masjid ini direncanakaan memiliki struktur setinggi empat lantai berbentuk menyerupai kapal dan bernuansa warna ungu. Tidak adanya tenaga ahli dalam pelaksanaan penyelidikan tanah dan perencanaan fondasi menjadi motivasi dalam memberikan pengabdian berupa penyelidikan tanah dan perencanaan fondasi yang akan digunakan untuk memenuhi salah satu persyaratan Persetujuan Bangunan Gedung (PBG) dan Syarat Layak Fungsi (SLF) oleh pihak Kota Banjarbaru. Penyelidikan tanah berupa Cone Penetration Test (CPT)/Sondir pada 2 (dua) titik dengan lapisan tanah keras pada kedalaman 17 m – 18 m. Direncanakan menggunakan minipile 25 cm x 25 cm sedalam 18 m. Diperoleh daya dukung tiang tunggal rencana sebesar 255,48 ton dan 291,54 ton. Dihasilkan kebutuhan fondasi tiang sebanyak 1 (satu) buah tiang pada 11 joint, 2 (dua) buah tiang pada 18 joint, dan 3 (tiga) buah tiang pada 9 joint. Perhitungan kontrol terhadap gaya aksial struktur menunjukkan jumlah tiang rencana mampu menopang beban struktur di atasnya denagn SF > 1. Bantuan perencanaan desain pondasi memperlancar proses mendapatkan desain fondasi minipile yang optimal dan efisien. Masyarakat sekitar, Pengurus dan Panitia Pembangunan Masjid Kapal Munzalan mendapatkan pengetahuan dan pemahaman proses desain fondasi bangunan.
Analisis Penyebab Amblasan Ruas Jalan (Studi Kasus: Ruas Jalan Gunung Ulin – Gunung Sari) Yusti Yudiawati; Rusdiansyah
Jurnal Serambi Engineering Vol. 9 No. 2 (2024): April 2024
Publisher : Faculty of Engineering, Universitas Serambi Mekkah

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

The different behaviour of soils from one region to another requires in-depth identification of the reaction of soils to certain treatments. A comprehensive study is needed to obtain information on the cause and effect of geotechnical cases such as collapse and landslide. The analysis conducted in this paper is based on the collapse of the Gunung Ulin - Gunung Sari road section that occurred in 2018 until the emergence of potential landslides on the excavated slope in 2021 for the construction of retaining walls. The analysis was carried out by reviewing the location of the collapse and conducting identification in the form of field and laboratory soil tests. The information obtained was then used to analyse the stability of the slope under review with the Geo5 application. The results of the analysis based on the geotechnical approach assumed that the collapse was caused by the condition of the soil layer itself in the form of soft clay and claystone whose condition was influenced by high rainfall during the time span of the incident. The analysis results obtained in this paper are expected to be a reference in anticipating similar events to occur in the future.
Co-Authors Ahmad Marzuki Ahmad Norhadi Akhmad Marzuki Joni Irawan Muhammad Suhaimi Muhammad Syawaluddin Nur Fitriah Rusdiansyah