Perbandingan Waktu & Biaya Metode Cast In Situ Dengan Precast Pada Box Underpass & Box Culvert Di Jalan Tol Probolinggo-Banyuwangi Paket 3b Zona 3

Distra, Annanta Mahassyah (2026) Perbandingan Waktu & Biaya Metode Cast In Situ Dengan Precast Pada Box Underpass & Box Culvert Di Jalan Tol Probolinggo-Banyuwangi Paket 3b Zona 3. Other thesis, Institut Teknologi Sepuluh Nopember.

Text 2035211021-Undergraduate_Thesis.pdf - Accepted Version Restricted to Repository staff only Download (23MB) | Request a copy

Abstract

Perkembangan pembangunan infrastruktur di Indonesia mendorong penerapan metode konstruksi yang lebih efisien, baik dari aspek waktu maupun biaya. Pada pekerjaan struktur beton seperti Box Underpass dan Box Culvert, metode pelaksanaan yang umum digunakan adalah metode cast in situ, yaitu pengecoran yang dilakukan langsung di lokasi proyek. Metode ini memiliki kelebihan dari sisi fleksibilitas pelaksanaan, namun memerlukan waktu yang relatif lama, kebutuhan bekisting yang besar, serta ketergantungan tinggi terhadap kondisi lapangan dan jumlah tenaga kerja. Sebagai alternatif, metode precast menawarkan sistem pelaksanaan dengan elemen pracetak yang diproduksi di luar lokasi proyek dengan kontrol kualitas yang lebih baik, kemudian diangkut dan dirakit di lapangan melalui proses erection. Penelitian ini bertujuan untuk menganalisis dan membandingkan metode cast in situ dan metode precast pada pekerjaan Box Underpass dan Box Culvert di Proyek Jalan Tol Probolinggo–Banyuwangi Paket 3B Zona 3 berdasarkan aspek waktu dan biaya pelaksanaan. Metode penelitian yang digunakan adalah analisis kuantitatif dengan memanfaatkan data sekunder berupa gambar rencana, data volume pekerjaan, produktivitas alat dan tenaga kerja, serta data biaya proyek. Perhitungan waktu pelaksanaan dilakukan menggunakan perangkat lunak Microsoft Project, sedangkan perhitungan biaya disusun berdasarkan analisis item pekerjaan masing-masing metode. Hasil analisis menunjukkan bahwa berdasarkan penjadwalan proyek secara keseluruhan, metode cast in situ memiliki total durasi pelaksanaan sekitar 465 hari, sedangkan metode precast memiliki total durasi sekitar 402 hari, sehingga metode precast memberikan percepatan waktu pelaksanaan proyek. Percepatan tersebut terutama disebabkan oleh berkurangnya tahapan pekerjaan di lapangan karena proses penulangan, bekisting, dan pengecoran digantikan oleh fabrikasi elemen pracetak dan proses erection. Dari aspek biaya, metode cast in situ menghasilkan total biaya pelaksanaan sebesar Rp 246.269.042.530,94, sedangkan metode precast membutuhkan biaya sebesar Rp 366.915.983.749,34. Dengan demikian, metode precast memerlukan biaya yang lebih besar dibandingkan metode cast in situ, dengan selisih biaya sebesar Rp 120.646.941.218,40. Berdasarkan hasil tersebut, dapat disimpulkan bahwa metode precast lebih unggul dari sisi waktu pelaksanaan, namun metode cast in situ lebih ekonomis dari sisi biaya pada proyek ini.
========================================================================================================================
The rapid development of infrastructure in Indonesia has encouraged the implementation of more efficient construction methods, both in terms of time and cost. In reinforced concrete structural works such as Box Underpasses and Box Culverts, the commonly used construction method is the cast in situ method, where concrete casting is performed directly at the project site. This method offers flexibility in execution; however, it requires a relatively long construction time, extensive formwork, and a high dependency on site conditions and labor availability. As an alternative, the precast method provides a construction system using precast elements produced off-site under better quality control, which are then transported and assembled on-site through an erection process. This study aims to analyze and compare the cast in situ and precast methods for Box Underpass and Box Culvert works in the Probolinggo–Banyuwangi Toll Road Project Package 3B Zone 3 based on time and cost aspects. The research method employed is quantitative analysis using secondary data, including design drawings, work volume data, equipment and labor productivity, and project cost data. The project duration was calculated using Microsoft Project software, while the cost estimation was prepared based on itemized work analysis for each method. The analysis results indicate that, based on the overall project schedule, the cast in situ method has a total construction duration of approximately 465 days, whereas the precast method has a total duration of approximately 402 days, showing that the precast method provides a shorter construction time. This time reduction is mainly due to the decreased number of on-site work stages, as reinforcement, formwork, and casting processes are replaced by off-site fabrication of precast elements and on-site erection. In terms of cost, the cast in situ method results in a total construction cost of IDR 246,269,042,530.94, while the precast method requires a total cost of IDR 366,915,983,749.34. Thus, the precast method incurs higher costs compared to the cast in situ method, with a cost difference of IDR 120,646,941,218.40. Based on these findings, it can be concluded that the precast method is superior in terms of construction time, whereas the cast in situ method is more economical in terms of cost for this project.

Item Type:	Thesis (Other)
Uncontrolled Keywords:	Box Culvert, Box Underpass, Cast in situ, Precast
Subjects:	T Technology > TE Highway engineering. Roads and pavements
Divisions:	Faculty of Civil Engineering and Planning > Civil Engineering > 22301-(D4) Diploma 4
Depositing User:	Annanta Mahassyah Distra
Date Deposited:	30 Jan 2026 06:28
Last Modified:	30 Jan 2026 06:28
URI:	http://repository.its.ac.id/id/eprint/131277

Actions (login required)

View Item