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All Journal Prokons: Jurnal Teknik Sipil Journal of Sustainable Civil Engineering (JOSCE) Construction and Material Journal Media Komunikasi Dunia Ilmu Sipil (MoDuluS) Jurnal Warta Desa (JWD)
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Politeknik Negeri Jakarta
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Journal : Construction and Material Journal

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PERENCANAAN FONDASI TIANG PANCANG PADA PROYEK TOWER 2 ARANDRA RESIDENCE Zuhri, Zulhady; Istiatun, Istiatun
Construction and Material Journal Vol 2, No 2 (2020): CONSTRUCTION AND MATERIAL JOURNAL VOL. 2 NO. 2 JULI 2020
Publisher : Politeknik Negeri Jakarta

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Abstract

ABSTRACTThe pile foundation is an sub-structure to load from the upper structure. Ultimate load carrying-capacity (qu) will be transfered into a hard soil layer by using a deep foundation system. To design the pile foundation, several methods are needed to obtain different bearing capacity values. This study determines the planned pile depth, pile dimensions and pile cap. The purpose of this final project is to plan the pile foundation for the Arandra Residance 2 tower construction project located in Cempaka Putih, Central Jakarta. The method used is the method of Meyerhof, U.S Army Corp, Tomlinson, α and λ. In addition, the calculation of reinforcement, immediate settlement and settlement of primary consolidation was also carried out. The results of the calculation of bearing capacity foundation are different values. The Meyerhof Qu method is 9846,786 kN, the U.S Army Corp method Qu = 11065.11 kN, the Tomlinson Qu method = 10409.68 kN, the method α = 9558.95 kN, and the method λ Qu = 10066.37 kN. Whereas according to Broms, the lateral bearing capacity is 10845 kN. In planning used reinforcement D25-270. Immediate settlement is 50.3 mm, primary consolidation settlement is 9.89 mm, and time rate of consolidation during 1.75 months. Keywords: Foundation, driven pile, bearing capacity, settlement, primary consolidation  ABSTRAKFondasi tiang merupakan fondasi yang menyalurkan beban struktur atas dan beban lainnya ke struktur lapisan tanah keras yang mempunyai daya dukung tinggi yang terletak jauh di dalam tanah. Untuk merencanakan fondasi tiang pancang diperlukan beberapa metode untuk mendapatkan nilai daya dukung yang berbeda. Studi ini menentukan kedalaman tiang pancang yang direncanakan, dimensi tiang pancang dan pilecap.  Tujuan dari tugas akhir ini adalah merencanakan pondasi tiang pancang untuk proyek pembangunan tower Arandra Residance 2 yang berlokasi di Cempaka Putih, Jakarta Pusat. Metode yang digunakan adalah metode Meyerhof, U.S Army Corp, Tomlinson, α dan λ. Daya dukung lateral menggunakan metode Broms. Selain itu juga dilakukan perhitungan penulangan, penurunan segera, dan penurunan konsolidasi primer. Hasil perhitungan daya dukung fondasi terdapat perbedaan nilai. Metode Meyeherhof Qu = 9846.786 kN, metode U.S Army Corp Qu = 11065.11 kN, metode Tomlinson Qu = 10409.68 kN, metode α = 9558.95 kN, dan metode λ Qu = 10066.37 kN. Sedangkan menurut broms daya dukung lateral sebesar 10845 kN. Pada perencanaan digunakan tulangan D25-270. Penurunan segera terjadi sebesar 50.3 mm, penurunan primer sebesar9.89 mm, dan kecepatan waktu penurunan konsolidasi selama 1.75 bulan. Kata kunci: Fondasi, tiang pancang, daya dukung, penurunan, dan konsolidasi primer
PERENCANAAN FONDASI TIANG PANCANG PADA PROYEK TOWER 2 ARANDRA RESIDENCE Zulhady Zuhri; Istiatun Istiatun
Construction and Material Journal Vol. 2 No. 2 (2020): Construction and Material Journal Vol. 2 No. 2 Juli 2020
Publisher : Politeknik Negeri Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32722/cmj.v2i2.3090

Abstract

The pile foundation is an sub-structure to load from the upper structure. Ultimate load carrying-capacity (qu) will be transfered into a hard soil layer by using a deep foundation system. To design the pile foundation, several methods are needed to obtain different bearing capacity values. This study determines the planned pile depth, pile dimensions and pile cap. The purpose of this final project is to plan the pile foundation for the Arandra Residance 2 tower construction project located in Cempaka Putih, Central Jakarta. The method used is the method of Meyerhof, U.S Army Corp, Tomlinson, α and λ. In addition, the calculation of reinforcement, immediate settlement and settlement of primary consolidation was also carried out. The results of the calculation of bearing capacity foundation are different values. The Meyerhof Qu method is 9846,786 kN, the U.S Army Corp method Qu = 11065.11 kN, the Tomlinson Qu method = 10409.68 kN, the method α = 9558.95 kN, and the method λ Qu = 10066.37 kN. Whereas according to Broms, the lateral bearing capacity is 10845 kN. In planning used reinforcement D25-270. Immediate settlement is 50.3 mm, primary consolidation settlement is 9.89 mm, and time rate of consolidation during 1.75 months.  Keywords: Foundation, Driven Pile, Bearing Capacity, Settlement, Primary Consolidation.
STUDI NILAI KUAT GESER TANAH LUNAK BERDASARKAN BESARNYA PENURUNAN YANG TERJADI Istiatun Istiatun; Handi Sudardja; Yuwono Yuwono
Construction and Material Journal Vol. 3 No. 2 (2021): Construction and Material Journal Vol. 3 No. 2 Juli 2021
Publisher : Politeknik Negeri Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32722/cmj.v3i2.3794

Abstract

Soft soil is not suitable for supporting construction that stands on it because it has low shaman power, high compressive properties, and little stability. The compressibility of the soil certainly affects the existing construction, especially if the settlement that occurs due to the compression of the soil is not permitted. While the low bearing capacity of the soil causes the design load cannot be carried out directly, it is generally given in stages. The advantage of providing the load that gradually causes the density of the soil will increase. The soil with increased density will increase the carrying capacity of the soil so that it can accept the load of the next stage. Increasing in bearing capacity is given due to the magnitude of the land subsidence that occurs. It is necessary to test with laboratory modeling. Soil samples were put in the test basin and given additional water to determine how things were in the field if the soil experienced an increase in water content. Soil samples were loaded and recorded the amount of settlement that occurred. Increasing bearing capacity by conducting direct shear test changes in the soil bearing capacity parameter values is known to correlate the magnitude of the decrease in soil that occurs. In addition, an analysis of changes in water content and soil volume weight was also carried out due to the magnitude of the decrease. From the test modeling results in the laboratory with a test basin, it was found that the greater the value of soil subsidence, the higher the cohesion value of the soil and the lower the shear angle in the soil. For soil, water content is inversely proportional to the decrease, the more significant the decrease, the smaller the water content. Meanwhile, the weight of the soil volume is directly proportional; the more significant the decrease that occurs, the greater the weight of the volume of the soil. Keywords: Settlement, Shear Strength Parameter, Soft Soil, Direct Shear Test.
ANALISIS STABILITAS TIMBUNAN DENGAN PERKUATAN GEOTEKSTIL DAN CERUCUK Fahrita Sari; Istiatun Istiatun
Construction and Material Journal Vol. 4 No. 3 (2022): Construction and Material Journal Vol. 4 No. 3 November 2022
Publisher : Politeknik Negeri Jakarta

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Abstract

On the Serpong–Balaraja Toll Road Section 1A (STA 4+550–SSTA 4+900), there is a swamp area that is designed to have an embankment, so repair and reinforcement of the soil are needed. Therefore, this analysis aims to analyze the safety factor and consolidation settlement on the original soil. In addition, this analysis was carried out on soil replacement, geotextile, a combination of soil replacement and geotextile methods, and cerucuk using Plaxis 2D v20. The original soil conditions were also analyzed by the Fellenius method. The analysis results on the original soil conditions with Plaxis 2D v20 indicated a collapse, while with the Fellenius method the safety factor was 1.5, so it was not safe. Based on the methods used, only the geotextile method with variations of five layers of geotextile in post-construction is not safe. In soil replacement and soil replacement with geotextiles, the safety factor is relatively the same between 5.5 and 8 meters of replacement soil. Therefore, the thickness of the replacement soil has an optimum point where the addition of the thickness of the replacement soil is not linear with an increase in the safety factor. The consolidation settlement in the geotextile method is greater than in other methods. The detailed explanation will be developed on the writing paper below. Keywords: Cerucuk, Consolidation Settlement, Geotextile, Safety Factor, Soil Replacement.
PERBANDINGAN PENURUNAN KONSOLIDASI METODE TERZAGHI DENGAN ASAOKA PADA VACUUM PRELOADING Fina Mayumi Boangmanalu; Istiatun Istiatun
Construction and Material Journal Vol. 5 No. 2 (2023): Construction and Material Journal Vol. 5 No. 2 Juli 2023
Publisher : Politeknik Negeri Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32722/cmj.v5i2.4750

Abstract

Around 20 million hectares of Indonesia's total land area, or more than 10%, has soft soil. Soft soils can be problematic in construction projects due to their low bearing capacity, high water content, limited permeability, and high compressibility. Vacuum preloading, a technique to hasten consolidation by employing atmospheric pressure from the vacuum as a surcharge load, is one of the improvements for soft soil. The Terzaghi method is typically used to calculate the prediction of the final settlement and the time to reach the final settlement, however the forecast of settlement by the Terzaghi method produces better results than the actual settlement. To estimate the final settlement that takes place in the field, a method with a reliable level of accuracy is used—the Asaoka method. The main goals of this analysis are to determine the final settlement using the Asaoka method, the time needed to reach the final settlement using the Asaoka method, the degree of consolidation caused by vacuum preloading, and soil parameters that support notable differences between the Terzaghi method and Asaoka method using back analysis. According to both site reviews, the Terzaghi method produced settlement outcomes that were 36% and 79% higher than those obtained using the Asaoka method. The time required to reach 90% consolidation on both site reviews are 252 days and 196 days. The results of the Asaoka method used to calculate the degree of consolidation on both site reviews are 92.33% and 94.47%. The value of compression index (Cc), which was derived by back analysis calculations, is what most strongly supports the significant outcomes between the Terzaghi method and the Asaoka method.
Co-Authors Ahmad Yasin Al Harits Aisyah Salimah Arliandy Pratama Arbad Azzahra Nadia Putri Diana Aulia Fahrita Sari Fina Mayumi Boangmanalu Handi Sudardja Rizal, Rikki Sofyan Yelvi Yelvi Yuwono Yuwono Zuhri, Zulhady Zulhady Zuhri