Evaluasi Daya Dukung Pondasi Tangki 5-T-43 pada Proyek Pembangunan Crude Oil Storage Tank Kasim, Papua Barat

Fadhilah, Mochamad Akmal (2025) Evaluasi Daya Dukung Pondasi Tangki 5-T-43 pada Proyek Pembangunan Crude Oil Storage Tank Kasim, Papua Barat. Other thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Pembangunan fasilitas Crude Oil Storage Tank di PT. Kilang Pertamina Internasional (PT.KPI) RU-VII Kasim merupakan proyek strategis untuk menjaga stabilitas pasokan energi
di wilayah Papua. Selama pengerjaan dilapangan, konstruksi pondasi Tangki 5-T-43 dihadapkan dengan dua masalah utama. pertama, terjadi deviasi horizontal tiang pancang dari
koordinat desainnya, dan kedua, mayoritas tiang (94,86%) terpancang pada kedalaman yang lebih pendek dari kedalaman rencana awal yaitu 18 meter. Kapasitas lateral tiang dianalisis menggunakan aplikasi bantu Lpile2022 untuk menilai pengaruh deviasi, sementara justifikasi
untuk kedalaman pemancangan yang lebih dangkal divalidasi dengan membandingkan hasil Static Loading Test (SLT) dengan perhitungan daya dukung teoritis. Stabilitas kelompok tiang
kemudian dimodelkan secara numerik terhadap kombinasi beban, termasuk pengaruh gempa sesuai SNI 1726-2019. Dari hasil analisis yang telah dilakukan, berdasarkan analisis interaksi tiang–tanah menggunakan metode kurva p–y, tiang pancang pondasi dinyatakan aman terhadap potensi kegagalan akibat deviasi, ditinjau dari kontrol defleksi, momen lentur, dan gaya geser. Pemancangan yang lebih pendek pun terjustifikasi karena daya dukung aktual dari hasil SLT
sebesar 310 ton (Metode Davisson) telah melampaui perhitungan teoritis. Evaluasi terhadap daya dukung pondasi kelompok, baik dengan pengaruh maupun tanpa pengaruh gempa,
menunjukkan bahwa pondasi eksisting tetap aman untuk menahan beban layan. Kondisi 1 dimana panjang tiang eksisting sesuai dengan kedalaman awal yaitu 18 meter, didapatkan pondasi dengan biaya material paling efisien adalah pondasi D800 dengan kedalaman 14 meter dan konfigurasi 294 tiang dengan total biaya Rp9.176.000.000,00. Kondisi 2 dimana panjang tiang eksisting disesuaikan kedalamannya menjadi 14 meter, didapatkan pondasi dengan biaya material paling efisien adalah pondasi D600 dengan kedalaman 14 meter dan konfigurasi 350 tiang dengan total biaya Rp7.840.000.000,00.
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The construction of the Crude Oil Storage Tank facility at PT Kilang Pertamina Internasional (PT KPI) RU-VII Kasim is a strategic project aimed at maintaining energy supply stability in the Papua region. During field implementation, the foundation construction for Tank 5-T-43 encountered two major issues. First, there was a horizontal deviation of the piles from their design coordinates. Second, the majority of the piles (94.86%) were driven to a shallower depth
than the original planned depth of 18 meters.The lateral capacity of the piles was analyzed using the Lpile2022 software to assess the impact of the deviation, while the justification for the shallower pile depth was validated by comparing the results of the Static Loading Test (SLT)
with theoretical bearing capacity calculations. The stability of the pile group was then numerically modeled under load combinations, including seismic effects based on SNI 1726- 2019.Based on the conducted analysis, using the pile–soil interaction method with p–y curves, the foundation piles were found to be safe from failure due to deviation, as assessed through deflection control, bending moment, and shear force. The shallower pile driving was also justified, as the actual bearing capacity from the SLT results, which reached 310 tons (using the Davisson Method), exceeded the theoretical calculations.The evaluation of the group pile
bearing capacity, both with and without seismic effects, indicated that the existing foundation remains safe under service loads. In Scenario 1, where the existing pile length matches the original depth of 18 meters, the most cost-efficient foundation in terms of material cost is a D800 foundation with a depth of 14 meters and a configuration of 294 piles, with a total cost of IDR 9,176,000,000.00. In Scenario 2, where the existing pile length is adjusted to 14 meters, the most cost-efficient option is a D600 foundation with a depth of 14 meters and a configuration of 350 piles, with a total cost of IDR 7,840,000,000.00

Item Type:	Thesis (Other)
Uncontrolled Keywords:	Daya Dukung Tiang, Deviasi Tiang, Stabilitas Pondasi Pile Bearing Capacity, Pile Deviation, Foundation Stability.
Subjects:	T Technology > TA Engineering (General). Civil engineering (General) > TA775 Foundations.
Divisions:	Faculty of Civil, Planning, and Geo Engineering (CIVPLAN) > Civil Engineering > 22201-(S1) Undergraduate Thesis
Depositing User:	Muhammad Akmal Fadila
Date Deposited:	29 Jul 2025 02:16
Last Modified:	29 Jul 2025 02:16
URI:	http://repository.its.ac.id/id/eprint/122432

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