Ma'ruf, Defa Fauzi (2026) Analisis Pengaruh Penggabungan Bored Pile Lama Dengan Bored Pile Baru Terhadap Daya Dukungnya Dan Alternatif Perencanaan Pondasi Rakit-Tiang (Piled-Raft) Pada Gedung Techno, Kawasan IT Center BRI Ragunan. Other thesis, Institut Teknologi Sepuluh Nopember.
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Abstract
Pembangunan Gedung Techno di Kawasan IT Center BRI Ragunan dibangun pada lahan bekas Gedung Asrama BRI. Pada lahan tersebut terdapat bored pile eksisting berdiameter 1000 mm dengan kedalaman 22 m dari struktur bangunan sebelumnya. Dalam pelaksanaannya, sebagian bored pile lama diintegrasikan dengan 85 bored pile baru berdiameter 1000 mm sedalam 30 m sebagai pondasi Gedung Techno, yaitu bangunan beton bertulang 12 lantai dengan 1 basement sedalam 3 m. Namun, integrasi tersebut masih menyisakan sejumlah bored pile lama yang belum dimanfaatkan. Tugas akhir ini bertujuan menganalisis pengaruh penggabungan bored pile lama terhadap daya dukung pondasi Gedung Techno serta merencanakan alternatif desain pondasi rakit-tiang (piled-raft) yang mengoptimalkan pemanfaatan seluruh bored pile lama yang tersedia. Analisis pondasi mengacu pada SNI 8460:2017 dengan daya dukung tiang tunggal dihitung menggunakan metode Luciano Decourt dan efisiensi kelompok tiang menggunakan persamaan Converse-Labarre. Terdapat empat konfigurasi pondasi yang ditinjau, yaitu Pondasi Rencana (desain awal dengan 85 bored pile baru), Pondasi Eksisting (gabungan bored pile baru dan lama pada lima pile cap), Pondasi Optimasi (pengembangan dengan reduksi tiang baru pada pile cap), dan Pondasi Piled-Raft. Hasil analisis menunjukkan penggabungan dengan bored pile lama berhasil meningkatkan kapasitas daya dukung kelompok tiang secara signifikan, dengan peningkatan tertinggi pada PC K12 sebesar +85% dan PC K10 sebesar +37,8%. Pondasi Optimasi berhasil mereduksi 8 bored pile baru dengan memaksimalkan pemanfaatan bored pile lama, sedangkan Pondasi Piled-raft dibagi menjadi 5 segmen raft dengan total 79 bored pile baru dan 24 bored pile lama yang seluruhnya memenuhi kontrol daya dukung kelompok, kontrol beban aksial 1 tiang, kontrol lateral, dan kontrol struktural raft. Perbandingan volume material menunjukkan Pondasi Eksisting membutuhkan 2.534,85 m³ beton dan 227.065,79 kg tulangan, Pondasi Optimasi menghemat 6,58% beton dan 8,18% tulangan, sedangkan Pondasi Piled-raft membutuhkan 30,17% beton dan 44,51% tulangan lebih banyak. Berdasarkan hasil tersebut, Pondasi Optimasi direkomendasikan sebagai alternatif paling efisien secara material untuk Gedung Techno BRI IT Center Ragunan.
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The construction of the Techno Building at the BRI IT Center Ragunan Area was built on the site of the former BRI Dormitory Building. On this land, there were existing bored piles with a diameter of 1000 mm and a depth of 22 m from the previous building structure. During construction, some of these existing bored piles were integrated with 85 new bored piles with a diameter of 1000 mm and a depth of 30 m as the foundation for the Techno Building, a 12-story reinforced concrete structure with one basement at a depth of 3 m. However, this integration left several existing bored piles unutilized. This final project aims to analyze the influence of integrating the existing bored piles on the bearing capacity of the Techno Building foundation and to design an alternative piled-raft foundation that optimizes the utilization of all remaining existing bored piles. Foundation analysis refers to SNI 8460:2017, with single pile bearing capacity calculated using the Luciano Decourt method and pile group efficiency using the Converse-Labarre equation. Four foundation configurations were analyzed, namely the Planned Foundation (initial design with 85 new bored piles), the Existing Foundation (combination of new and existing bored piles on five pile caps), the Optimized Foundation (development by reducing the number of new piles on pile caps with excess capacity), and the Piled-raft Foundation. The analysis results show that the integration with existing bored piles successfully increased the pile group bearing capacity significantly, with the highest increase occurring at PC K12 by +85% and PC K10 by +37.8%. The Optimized Foundation successfully reduced 8 new bored piles by maximizing the use of existing bored piles, while the Piled-raft Foundation was divided into 5 raft segments with a total of 79 new bored piles and 24 existing bored piles, all of which met the pile group bearing capacity control, single pile axial load control, lateral control, and raft structural control. The material volume comparison shows that the Existing Foundation requires 2,534.85 m³ of concrete and 227,065.79 kg of reinforcement, the Optimized Foundation saves 6.58% of concrete and 8.18% of reinforcement, while the Piled-raft Foundation requires 30.17% more concrete and 44.51% more reinforcement. Based on these results, the Optimized Foundation is recommended as the most material-efficient foundation alternative for the Techno Building at BRI IT Center Ragunan.
| Item Type: | Thesis (Other) |
|---|---|
| Uncontrolled Keywords: | Daya Dukung Pondasi, Rakit-Tiang (Piled-Raft), Reused Bored Pile, Optimasi Pondasi, Foundation Bearing Capacity, Piled-Raft, Reused Bored Pile, Foundation Optimization |
| Subjects: | T Technology > TA Engineering (General). Civil engineering (General) > TA455.S6 Soil (Materials of engineering and construction) T Technology > TA Engineering (General). Civil engineering (General) > TA775 Foundations. T Technology > TA Engineering (General). Civil engineering (General) > TA780 Piles and pile-driving T Technology > TA Engineering (General). Civil engineering (General) > TA780.C29 Piling (Civil engineering) |
| Divisions: | Faculty of Civil, Planning, and Geo Engineering (CIVPLAN) > Civil Engineering > 22201-(S1) Undergraduate Thesis |
| Depositing User: | Defa Fauzi Ma`ruf |
| Date Deposited: | 28 Jul 2026 08:34 |
| Last Modified: | 28 Jul 2026 08:34 |
| URI: | http://repository.its.ac.id/id/eprint/138925 |
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