Analisa Kajian Penggunaan Alat Berat Pada Pekerjaan Tanah Proyek Pembangunan Jalan (Studi Kasus : Zona I Pada Proyek Pembangunan Jalan Tol Padang-Pekanbaru By Pass Km 25)
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Summary
This study analyzes the productivity, cost, and time efficiency of heavy equipment usage in earthworks for road construction, specifically focusing on subgrade filling and compation. The research addresses common project obstacles such as delays and cost overruns, often caused by unskilled operators or inefficient equipment combinations. The case study examines Zone I of the Padang-Pekanbaru Bypass Toll Road Project at Km 25, involving a total earthwork volume of 42,643.68 m³ of slightly sandy clay soil. The methodology involved collecting primary data through field observations and interviews, and secondary data from contractor contracts, equipment brochures, and reference books. The study calculated the productivity of individual machines—including excavators, dump trucks, bulldozers, sheepfoot rollers, vibration rollers, and water tanker trucks—based on field conditions. It then developed and compared three alternative equipment combinations against the baseline field condition. These alternatives varied in equipment quantity and assumed efficiency factors, ranging from 0.75 (standard field condition) to 0.80 (prime condition). The analysis aimed to identify the most efficient combination in terms of minimizing both duration and total cost. The results indicated that the baseline field condition required 74 days and cost IDR 2,449,182,093.40. Alternative 1, assuming prime equipment conditions without increasing machine counts, reduced the duration to 55 days and cost to IDR 1,946,283,586.91. Alternative 2 yielded similar results to Alternative 1. Alternative 3, which increased the number of units to two excavators, five dump trucks, three bulldozers, two sheepfoot rollers, two vibration rollers, and three water tanker trucks, achieved the shortest duration of 33 days with a total cost of IDR 2,131,752,569.29. Although Alternative 3 had a higher cost than Alternative 1, it was selected as the most efficient recommendation because it significantly reduced the project timeline by 41 days compared to the field condition and saved 12.96% in costs relative to the baseline. The study concludes that optimizing heavy equipment composition is critical for managing earthwork projects. The recommended configuration for this specific project balances cost savings with significant time reduction. The findings provide a practical framework for construction managers to calculate equipment productivity and select optimal machine combinations to mitigate delays and budget overruns in road development projects.
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| Stage | Outcome | Tool | Model | Prompt | Attempts | Completed |
|---|---|---|---|---|---|---|
| discover | success | Crossref | — | — | 1 | 2026-06-25 |
| archive | success | canonical_url | — | — | 1 | 2026-06-26 |
| extract | success | cached | — | — | 2 | 2026-06-26 |
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| embed | success | embed | Qwen/Qwen3-Embedding-8B | — | 1 | 2026-06-25 |
| promote | success | — | — | — | 1 | 2026-06-25 |
| 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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