Jatmiko, Muhammad Fauzi (2026) Analisis Redesain Fondasi Tiang Pancang Pada Struktur Slab On Pile Proyek Pembangunan Jalan Tol Ruas Akses Bandara Dhoho Kediri. Undergraduate thesis, UPN Veteran Jawa Timur.
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Abstract
Pile foundations in slab-on-pile structures play an important role in ensuring structural stability and performance, particularly under variable soil conditions. In the Dhoho Kediri Airport Access Toll Road Construction Project, results from the Pile Driving Analyzer (PDA) test indicated that the bearing capacity of several existing piles did not satisfy the design loads, necessitating an evaluation and redesign of the foundation system. This study aims to evaluate the capacity of the existing foundation and determine the most optimal pile foundation design alternative from both technical and economic perspectives. The redesign was carried out by comparing several pile diameter alternatives, namely 0.5 m, 0.6 m, and 0.8 m, in order to obtain a foundation design that is safe, effective, and efficient. The analysis was conducted using subsurface investigation data obtained from the Standard Penetration Test (SPT), which were corrected to obtain the corrected N-SPT values (design N-values). The axial bearing capacity of a single pile was calculated using the Nakazawa method. Axial loads acting on the piles were analyzed using SAP2000, while settlement, differential settlement, lateral deformation, and bending moment analyses were performed using PLAXIS 2D. The results show that all redesign alternatives satisfied the requirements for bearing capacity, settlement, lateral deformation, and bending moment. Based on the comparison of technical and economic aspects, the pile foundation with a diameter of 0.8 m, a depth of 15.5 m, and a configuration of 5 piles was selected as the most optimal design alternative. This variation produced an allowable bearing capacity of 200.38 tons based on the Nakazawa method and 193.86 tons based on the Reese and Wright method, both of which are greater than the maximum axial load acting on the pile (Pmax) of 180.42 tons, indicating that the pile is capable of supporting the applied load with a higher level of safety. In addition, the analysis results showed a lateral deformation value of 21.72 mm and a pile settlement of 31.74 mm, both of which remain within the allowable limits. The bending moment analysis also produced a value of 184.2 kN·m, which is still below the pile crack moment limit of 245.2 kN·m, indicating that the pile is safe against potential cracking due to bending forces. The selection of the third redesign also considered field implementation aspects. A pile depth of 15.5 m was considered more realistic and safer for the pile driving process. Therefore, the use of 0.8 m diameter piles is considered to provide the best balance between bearing capacity, structural safety, and ease of construction implementation in the field.
| Item Type: | Thesis (Undergraduate) | ||||||||||||
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| Subjects: | T Technology > TA Engineering (General). Civil engineering (General) | ||||||||||||
| Divisions: | Faculty of Engineering > Departement of Civil Engineering | ||||||||||||
| Depositing User: | Muhammad Fauzi Jatmiko | ||||||||||||
| Date Deposited: | 29 May 2026 07:08 | ||||||||||||
| Last Modified: | 29 May 2026 07:08 | ||||||||||||
| URI: | https://repository.upnjatim.ac.id/id/eprint/53201 |
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