SYAH, FADLAN (2026) ANALISIS KOMPARATIF BIAYA DAN WAKTU METODE CONCRETE CAISSON DENGAN STEEL SHEET PILE PADA PEKERJAAN PIT PROYEK PIPA PAM JAYA AREA BUARAN HILIR. S1 thesis, Universitas Mercu Buana Jakarta.
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Abstract
In pipe jacking, the pit is both launching and receiving point and lies on the critical path of urban water pipeline construction; delay here postpones all subsequent work. On the PAM JAYA Buaran Hilir pipeline project, the earth retaining system was chosen on technical grounds alone, without comparing cost and time. This study compares the cost and duration of the Concrete Caisson and Steel Sheet Pile methods to determine the more efficient option for a 12 × 4 × 8 m starting pit. A comparative quantitative case study on work package P-11 involved purposively selected informants: site engineer, field supervisor, quantity surveyor, and project manager. Primary data came from field observation, technical documentation, and duration recording; secondary data from drawings, budget plans, schedules, and DKI Jakarta 2025/2026 unit prices. Analysis covered volume calculation, unit price analysis, daily productivity, four-level work breakdown structure scheduling with Critical Path Method, and cost efficiency, time efficiency, and an equally weighted Method Efficiency Index. Total cost reached IDR 494,981,474 for Concrete Caisson versus IDR 667,189,516 for Steel Sheet Pile, a difference of IDR 172,208,042 or 25.81% cost efficiency; unit costs were IDR 1,289,014/m³ versus IDR 1,737,473/m³. Durations were 24 versus 37 days, yielding 35.14% time efficiency and a Method Efficiency Index of 30.48%. Work content is identical at 42 package-days, yet Steel Sheet Pile requires driving and extracting 80 sheet piles, absorbing 22 days (59.5%), while five temporary retaining components form 71.8% of direct costs. Sensitivity testing confirms robustness: halving rental duration and removing mobilization costs still leaves a gap of IDR 34.84 million. Validation by three experts produced an index of 80.00%, categorized valid. Concrete Caisson is therefore the more efficient composite choice; Steel Sheet Pile's higher cost is structural, warranting cost–time analysis during planning. Keywords: Concrete Caisson; Critical Path Method; cost efficiency; time efficiency; Steel Sheet Pile Pekerjaan pit merupakan titik peluncuran sekaligus penerimaan pada metode pipe jacking dan menempati lintasan kritis pembangunan jaringan pipa air bersih perkotaan; keterlambatannya menunda seluruh pekerjaan sesudahnya. Pada proyek pipa PAM JAYA Area Buaran Hilir, pemilihan sistem penahan tanah ditetapkan atas pertimbangan teknis tanpa perbandingan biaya dan waktu. Penelitian ini bertujuan membandingkan biaya dan durasi metode Concrete Caisson dan Steel Sheet Pile serta menetapkan metode paling efisien pada starting pit 12 × 4 × 8 m. Pendekatan kuantitatif komparatif berbentuk studi kasus diterapkan pada paket pekerjaan P-11 dengan informan purposive: site engineer, pelaksana lapangan, quantity surveyor, dan project manager. Data primer dihimpun melalui observasi lapangan, dokumentasi teknis, dan pencatatan durasi aktivitas; data sekunder berupa gambar kerja, rencana anggaran biaya, time schedule, dan standar harga satuan DKI Jakarta 2025/2026. Analisis mencakup perhitungan volume, analisis harga satuan pekerjaan, produktivitas harian, penjadwalan struktur rincian kerja empat tingkat dengan Critical Path Method, serta pengukuran efisiensi biaya, efisiensi waktu, dan Indeks Efisiensi Metode berbobot setara. Hasil penelitian menunjukkan total biaya Concrete Caisson Rp494.981.474 dan Steel Sheet Pile Rp667.189.516, atau selisih Rp172.208.042 setara efisiensi biaya 25,81%, dengan biaya satuan Rp1.289.014/m³ berbanding Rp1.737.473/m³. Durasi penyelesaian tercatat 24 hari berbanding 37 hari sehingga efisiensi waktu mencapai 35,14% dan Indeks Efisiensi Metode 30,48%. Meskipun kandungan kerja keduanya sama (42 hari-paket), Steel Sheet Pile memikul pemancangan dan pencabutan 80 batang turap yang menyerap 22 hari atau 59,5% durasi, sementara lima komponen penahan sementaranya membentuk 71,8% biaya langsung. Uji sensitivitas membuktikan keunggulan tersebut kokoh karena pemangkasan masa sewa hingga separuh disertai peniadaan biaya mobilisasi tetap menyisakan selisih Rp34,84 juta. Validasi tiga pakar menghasilkan indeks 80,00% berkategori valid. Concrete Caisson disimpulkan lebih efisien secara komposit; kemahalan Steel Sheet Pile bersifat struktural sehingga analisis biaya–waktu perlu menjadi bagian pemilihan sistem penahan tanah sejak perencanaan. Kata kunci: Concrete Caisson; Critical Path Method; efisiensi biaya; efisiensi waktu; Steel Sheet Pile
| Item Type: | Thesis (S1) |
|---|---|
| NIM/NIDN Creators: | 41124120040 |
| Uncontrolled Keywords: | Concrete Caisson; Critical Path Method; efisiensi biaya; efisiensi waktu; Steel Sheet Pile |
| Subjects: | 600 Technology/Teknologi > 620 Engineering and Applied Operations/Ilmu Teknik dan operasi Terapan > 624 Civil Engineering/Teknik Sipil 600 Technology/Teknologi > 650 Management, Public Relations, Business and Auxiliary Service/Manajemen, Hubungan Masyarakat, Bisnis dan Ilmu yang Berkaitan > 658 General Management/Manajemen Umum > 658.9 Construction Management/Manajemen Konstruksi |
| Divisions: | Fakultas Teknik > Teknik Sipil |
| Depositing User: | khalimah |
| Date Deposited: | 28 Sep 2026 10:47 |
| Last Modified: | 28 Sep 2026 10:47 |
| URI: | http://repository.mercubuana.ac.id/id/eprint/104141 |
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