Pratama, Mochammad Choirusydhia (2025) Analisis Track Quality Index (TQI) Pada Jalur Rel Kereta Api Untuk Track Gauge 1435 Mm (Jalur Rel Lintas Makassar - Parepare Segmen Maros - Parepare Km 26+000 – Km 29+600). Undergraduate thesis, UPN Veteran Jawa Timur.
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Abstract
The geometric quality of railway tracks greatly influences the comfort, safety, and operational efficiency of train services. One of the quantitative methods used to assess track quality is the Track Quality Index (TQI), which is a composite index derived from several key track geometry parameters such as alignment, profile, cross level, and track gauge. This study aims to analyze the TQI values of the Makassar–Parepare railway line with a 1435 mm track gauge and to examine the influence of geometry parameters as well as ballast layer thickness on TQI. The research employs measurement data obtained from the track recording car of the Directorate General of Railways, covering 18 segments of 200 meters each. The analysis was carried out using descriptive statistics and simple linear regression to determine the relationship between geometry parameters, ballast thickness, and TQI. The results indicate that TQI values vary across segments, with 66.66% classified as Category I (Excellent), 22.22% as Category II (Good), and 11.11% as Category III (Fair). Among the parameters, track gauge shows the most significant influence on TQI, with a coefficient of determination (R²) of 96.7%, while cross level has the most significant influence on ballast thickness, with an R² of 90.7%. Furthermore, greater ballast thickness tends to result in better TQI values, indicating that ballast plays a crucial role in maintaining track geometry stability. These findings underscore the importance of preventive maintenance of track structures, particularly the ballast layer and geometric parameters, in sustaining track quality.
| 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: | MOCHAMMAD CHOIRUSYDHIA PRATAMA | ||||||||||||
| Date Deposited: | 24 Oct 2025 02:30 | ||||||||||||
| Last Modified: | 24 Oct 2025 02:30 | ||||||||||||
| URI: | https://repository.upnjatim.ac.id/id/eprint/45711 |
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