Jansen, Jerry (2025) Studi Pondasi Konstruksi Jaring Rusuk Beton (KJRB) terhadap Kemampuan Menerima Beban Struktur dan Mengurangi Penurunan Tanah Studi Kasus: Gedung Perpustakaan Universitas Negeri Padang. Other thesis, Institut Teknologi Sepuluh Nopember.
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Abstract
Pondasi Konstruksi Jaring Rusuk Beton Pasak Vertikal (KJRB) merupakan sistem pondasi dangkal inovatif yang dikembangkan untuk meningkatkan stabilitas struktur pada tanah lunak dan daerah rawan gempa. Penelitian ini bertujuan untuk mengevaluasi kinerja pondasi KJRB eksisting yang digunakan pada Gedung Perpustakaan Universitas Negeri Padang, serta mengkaji pengaruh variasi dimensi rusuk beton dan konfigurasi posisi pasak terhadap daya dukung dan penurunan tanah. Data sekunder berupa hasil uji tanah, geometri pondasi, dan beban struktur digunakan sebagai dasar pemodelan numerik dengan perangkat lunak Plaxis 3D. Simulasi dilakukan untuk skenario pondasi eksisting, penebalan dan penambahan tinggi rusuk hingga 50%, serta reposisi pasak vertikal ke bawah kolom struktur. Pada potongan arah Barat Laut-Tenggara, hasil menunjukkan bahwa pondasi eksisting memiliki daya dukung sebesar ±979 kN/m² dengan penurunan total <0,05 m dan nilai angular distortion (βmax) dalam batas aman sebesar 0,0019 < 0,002 sesuai batas toleransi NAVFAC DM-07. Penambahan tinggi rusuk 50% terlihat meningkatkan daya dukung hingga ±1060 kN/m² namun yang mempengaruhi adalah variasi kedalaman pondasinya (Df) serta tidak berdampak baik pada penurunan tanah yang seragam. Penebalan rusuk menghasilkan pengaruh <1% terhadap daya dukung, namun efektif menurunkan differential settlement hingga penebalan +30% dengan rasio βmax 0,00091 < 0,002. Posisi pasak tidak banyak mempengaruhi pengurangan differential settlement dan tidak meningkatkan kapasitas dukung. Dari hasil tersebut disimpulkan bahwa optimalisasi dimensi rusuk dan posisi pasak vertikal dapat meningkatkan kinerja pondasi KJRB tergantung pada aspek yang ingin ditngkatkan. Kajian lebih lanjut direkomendasikan terkait efisiensi biaya dan metode desain lanjutan.untuk mendalami aspek proses desain dan perhitungan struktural lebih detail.
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The Vertical Pile-Reinforced Rib Mesh Concrete Foundation (KJRB) is an innovative shallow foundation system developed to enhance structural stability on soft soils and in seismic-prone areas. This study aims to evaluate the performance of the existing KJRB foundation system used in the Library Building of Universitas Negeri Padang, and to examine the effects of varying rib dimensions and pile position configurations on bearing capacity and soil settlement. Secondary data, including soil test results, foundation geometry, and structural loads, were used as the basis for numerical modeling using Plaxis 3D software. Simulations were conducted for several scenarios: the existing foundation, increased rib height and thickness up to 50%, and repositioning of vertical piles directly beneath structural columns. In the Northwest–Southeast section, results indicate that the existing foundation exhibits a bearing capacity of approximately ±979 kN/m² with a total settlement of less than 0.05 m, and an angular distortion (βmax) value of 0.0019, which is within the safe limit of 0.002 as per NAVFAC DM-07 tolerances. Increasing the rib height by 50% was found to improve the bearing capacity to ±1060 kN/m²; however, the determining factor appears to be the variation in foundation depth (Df), with limited effectiveness in achieving uniform settlement. Rib thickening had less than a 1% impact on bearing capacity but proved effective in reducing differential settlement—up to a +30% thickness increase—with a βmax ratio of 0.00091, still within acceptable limits (<0.002). Pile repositioning had minimal effect on reducing differential settlement and did not enhance load-bearing capacity. It is concluded that optimizing the rib dimensions and the position of vertical piles can improve the performance of the KJRB foundation, depending on the specific performance aspects targeted. Further research is recommended to explore cost efficiency and advanced design methods for a more detailed understanding of the design process and structural calculations.
| Item Type: | Thesis (Other) |
|---|---|
| Uncontrolled Keywords: | Pondasi KJRB, Pasak Vertikal, Rusuk Beton, Daya Dukung Tanah, Settlement, PLAXIS 3D, KJRB Foundation, Vertical Piles, Concrete Rib Foundation, Soil Bearing Capacity, Settlement, PLAXIS 3D. |
| Subjects: | T Technology > TA Engineering (General). Civil engineering (General) > TA169.5 Failure analysis T Technology > TA Engineering (General). Civil engineering (General) > TA347 Finite Element Method T Technology > TA Engineering (General). Civil engineering (General) > TA775 Foundations. |
| Divisions: | Faculty of Civil, Planning, and Geo Engineering (CIVPLAN) > Civil Engineering > 22201-(S1) Undergraduate Thesis |
| Depositing User: | Jerry Jansen |
| Date Deposited: | 29 Jul 2025 07:40 |
| Last Modified: | 29 Jul 2025 07:40 |
| URI: | http://repository.its.ac.id/id/eprint/122645 |
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