Analisis Tebal Perkerasan Lentur Menggunakan Metode AASHTO 1993
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Summary
This study addresses the need for new road infrastructure within the Universitas Borneo Tarakan campus in Tarakan, Indonesia, driven by increasing student populations and campus expansion. The research specifically analyzes the required thickness of flexible pavement for new local campus roads using the AASHTO 1993 method. The motivation stems from the lack of internal road connectivity between new campus buildings and the main campus area, which currently forces traffic onto external city roads, compromising safety and security. The methodology employs secondary data from a 2019 campus road planning report. The analysis utilizes the AASHTO 1993 design procedure, which calculates the Structural Number (SN) through two approaches: the nomogram method and the trial-and-error method. Key design parameters include a 20-year design life, 5.5% annual traffic growth, a subgrade California Bearing Ratio (CBR) of 6%, and a reliability level of 80%. Traffic data was converted into Equivalent Standard Axle Loads (ESAL) based on vehicle types and axle configurations. The study also incorporated reliability factors (FR) and drainage coefficients to adjust for traffic estimation errors and environmental conditions. The results indicate that the total daily ESAL for the design lane is approximately 4.04, accumulating to 0.05 x 10^6 ESAL over the design life. Using the nomogram method, the calculated structural numbers were SN_total = 2.09, SN_2 = 1.59, and SN_1 = 1.39. The trial-and-error method, which included a reliability factor (FR = 2.39) resulting in an adjusted W18 of 0.11 x 10^6 ESAL, yielded SN_total = 2.05, SN_2 = 1.56, and SN_1 = 1.36. Based on these SN values and minimum layer thickness requirements, the final recommended flexible pavement structure has a total thickness of 39 cm. This consists of a 9 cm asphalt surface course, a 15 cm base course, and a 15 cm subbase course. The significance of this study lies in providing a validated design specification for campus infrastructure that balances structural integrity with local traffic conditions. By applying the AASHTO 1993 method with specific reliability adjustments, the research ensures the pavement can withstand projected traffic loads over its service life. The findings offer a practical engineering solution for connecting disparate campus areas, enhancing accessibility and safety for the university community while adhering to established civil engineering standards.
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| Stage | Outcome | Tool | Model | Prompt | Attempts | Completed |
|---|---|---|---|---|---|---|
| discover | success | Crossref | — | — | 1 | 2026-06-24 |
| archive | success | canonical_url | — | — | 1 | 2026-06-26 |
| extract | success | cached | — | — | 2 | 2026-06-26 |
| clean | success | clean | — | — | 1 | 2026-06-25 |
| chunk | success | chunk | — | — | 1 | 2026-06-25 |
| embed | success | embed | Qwen/Qwen3-Embedding-8B | — | 1 | 2026-06-25 |
| promote | success | — | — | — | 1 | 2026-06-24 |
| summarize | success | llm | qwen3.6-27b-prismaquant | summ-v5 | 1 | 2026-06-26 |
| tag | success | vector_similarity | — | — | 6 | 2026-06-25 |
| verify | success | — | — | — | 1 | 2026-06-26 |
Summary generated by qwen3.6-27b-prismaquant on 2026-06-26; verification: verified.
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