MAHESA, IVAN (2025) EVALUASI DAYA DUKUNG TIANG BOR PADA PROYEK LRT JAKARTA FASE 1B P148B UNTUK MENINGKATKAN EFISIENSI MATERIAL BETON. S1 thesis, Universitas Mercu Buana Jakarta.
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Abstract
The foundation functions to transmit the load on the upper structure to the soil layer on the foundation. Soil investigations also determine financial planning decisions and outcomes. This is because the parameters produced by the soil investigation will be used in the input process as independent variables which will determine the value of variable attachment such as bearing capacity, settlement and also cost efficiency. The main focus of this research is evaluating the dimension and configuration of drilled piles so that in terms of carrying capacity they remain in accordance with safety factors and are also efficient from a cost perspective. The method used in this study involved designing alternative bored piles with various dimensions and configurations based on bearing capacity, settlement, lateral deflection, and liquefaction analysis. The study then compared the concrete volume required for different designs with the existing conditions. The calculation results for the existing bored pile, with a diameter of 1.5 m, a depth of 36 m, and a 2 × 3 configuration, showed that the group pile bearing capacity and safety factors were as follows: Meyerhof method 4756.34 tons & 3.49, Reese & Wright method 8161.98 tons & 6.00, and Reese & O’Neil method 6428.69 tons & 4.72. The total settlement for the existing bored pile was 390.05 mm, while the lateral deflection was 0.79 mm. Since the settlement did not meet the requirements of SNI 8460-2017, an alternative bored pile was necessary. The results indicated that the alternative bored pile, with a diameter of 1.3 m, a depth of 38 m, and a 2 × 3 configuration, could reduce concrete usage by 20.72%. The bearing capacity analysis showed that the Meyerhof method provided the lowest values, with a bearing capacity of 4589.57 tons and a safety factor of 3.67. Meanwhile, the Reese & O’Neil method resulted in 5539.53 tons & 4.43, and the Reese & Wright method produced 7243.68 tons & 5.80. The total settlement for the alternative bored pile was 132.3 mm, and the lateral deflection was 1.06 mm. This alternative bored pile still met the requirements of SNI 8460-2017. Additionally, the liquefaction analysis confirmed that all soil layers were not susceptible to liquefaction, even under an earthquake with a magnitude of 9.5 Richter scale. Keywords : Concrete Volume Efficiency, Bearing Capacity, Settlement, Liquefaction, Lateral Deflection Fondasi berfungsi untuk meneruskan beban pada struktur atas ke lapisan tanah pada fondasi. Penyelidikan tanah juga menentukan keputusan dan hasil dari perencanaan fondasi. Ini dikarenakan parameter yang dihasilkan oleh penyelidikan tanah akan digunakan dalam proses input sebagai variabel bebas yang akan menentukan nilai variabel terikat seperti daya dukung, penurunan dan juga efisiensi biaya. Fokus utama dari penelitian ini adalah evaluasi dimensi dan juga konfigurasi tiang bor agar dari segi daya dukung tetap sesuai dengan keamanan yang disyaratkan dan juga efisien dari segi penggunaan material. Metode yang dilakukan adalah mendesain tiang bor alternatif pada berbagai dimensi dan konfigurasi, berdasarkan daya dukung, penurunan, defleksi lateral & likuefaksi. Kemudian, membandingkan volume beton pada berbagai desain dengan kondisi existing. Hasil perhitungan pada tiang bor existing dengan diameter 1,5 m, kedalaman 36 m dan konfigurasi 2 x 3, menunjukkan bahwa nilai daya dukung tiang kelompok dan faktor keamanan metode Meyerhof sebesar 4756,34 ton & 3,49, Reese & Wright sebesar 8161,98 ton & 6,00, Reese & O’Neil sebesar 6428,69 ton & 4,72. Penurunan total pada tiang bor existing sebesar 390,05 mm. Kemudian, defleksi lateral pada tiang bor existing sebesar 0,79 mm. Penurunan pada tiang bor ini tidak memenuhi persyaratan SNI 8460-2017 sehingga diperlukan tiang bor alternatif. Dari hasil perhitungan, diperoleh bahwa konfigurasi tiang bor alternatif dengan diameter 1,3 m, kedalaman 38 m, dan konfigurasi 2 × 3 mampu menghemat penggunaan material beton sebesar 20,72%. Analisis daya dukung menunjukkan bahwa metode Meyerhof memberikan daya dukung & faktor keamanan terkecil sebesar 4589.57 ton & 3,67, kemudian untuk metode Reese & O’Neil sebesar 5539,53 & 4,43, kemudian Reese & Wright sebesar 7243,68 ton & 5,80. Penurunan total sebesar 132,3 mm dan defleksi lateral sebesar 1,06 mm. Tiang bor alternatif ini masih memenuhi persyaratan SNI 8460-2017. Seluruh lapisan tanah tidak berpotensi likuefaksi hingga gempa dengan magnitudo 9,5 SR Kata Kunci : Efisiensi Volume Beton, Daya Dukung, Penurunan, Likuefaksi, Defleksi Lateral
| Item Type: | Thesis (S1) |
|---|---|
| Call Number CD: | FT/SIP. 25 027 |
| NIM/NIDN Creators: | 41121010090 |
| Uncontrolled Keywords: | Efisiensi Volume Beton, Daya Dukung, Penurunan, Likuefaksi, Defleksi Lateral |
| Subjects: | 600 Technology/Teknologi > 620 Engineering and Applied Operations/Ilmu Teknik dan operasi Terapan > 624 Civil Engineering/Teknik Sipil 600 Technology/Teknologi > 690 Buildings/Teknik Bangunan > 691 Building Material/Material Bangunan 600 Technology/Teknologi > 690 Buildings/Teknik Bangunan > 691 Building Material/Material Bangunan > 691.3 Concrete and Artificial Stones/Beton dan Batu Buatan untuk Bangunan 700 Arts/Seni, Seni Rupa, Kesenian > 720 Architecture/Arsitektur > 721 Architectural Structure/Struktur Arsitektur > 721.1 Foundations/Pondasi |
| Divisions: | Fakultas Teknik > Teknik Sipil |
| Depositing User: | khalimah |
| Date Deposited: | 03 Mar 2025 01:17 |
| Last Modified: | 03 Mar 2025 01:17 |
| URI: | http://repository.mercubuana.ac.id/id/eprint/94577 |
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