Perencanaan Alternatif Pondasi Pipe Sleeper Pada Proyek Pembangunan Open Access Kasim Section Main Sleeper 1 Kabupaten Sorong

Muflih, Ahmad Dzaki Muflih (2025) Perencanaan Alternatif Pondasi Pipe Sleeper Pada Proyek Pembangunan Open Access Kasim Section Main Sleeper 1 Kabupaten Sorong. Other thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Pembangunan Open Access Kasim merupakan proyek infrastruktur penyalur minyak bumi yang dilakukan oleh salah satu perusahaan Indonesia yang bergerak di bidang migas di kasim. Pembangunan tersebut dibangun di atas daerah seluas kurang lebih 80 Hektar. Pada saat proses pembangunannya terdapat kendala dalam aspek geoteknik, yaitu perbedaan antara jenis desain pondasi pipe sleeper saat kesepakatan awal Front End Engineering Design (FEED) dengan hasil Detail Engineering Design (DED). Hal itu terjadi karena saat pondasi pipe sleeper yang didesain saat FEED menggunakan data tanah yang terlalu jauh dari pipa dan tidak sesuai aturan jarak minimum SNI 8460-2017, pasal 5.2.4.1.3, tabel 2. Kondisi eksisting saat ini, pembangunan pipe sleeper menggunakan desain pondasi dangkal hasil FEED, namun setelah pembangunan berjalan ternyata terdapat beberapa nilai dari differential settlement antar pondasi tidak memenuhi persyaratan. Maka saat perencanaan DED untuk pembangunan section selanjutnya salah satunya ialah main sleeper 1 dengan menggunakan data tanah hasil investigasi oleh PT. Soilens yang sudah sesuai dengan 8460-2017, desain pondasi berubah menjadi pondasi dalam atau minipile. Untuk itu, pada tugas akhir ini diperlukan analisis perkuatan pada pondasi eksisting yang
sudah terbangun dan mengevaluasi perencanaan pondasi eksisting untuk mengetahui apakah desain pondasi dangkal FEED dapat tetap digunakan untuk section main sleeper 1 yang belum terbangun dengan mengacu pada data tanah yang telah benar. Apabila ternyata daya dukung belum memenuhi maka diperlukan perencanaan perkuatan tambahan. Selain itu diperlukan perencanaan alternatif pondasi dengan menggunakan data tanah yang telah benar agar mendapatkan perencanaan yang aman dan kuat. Terakhir dilakukan analisis volume material untuk mendapatkan perencanaan yang paling efektif bila ditinjau dari segi volume material. Dari hasil analisis pondasi eksisting sleeper 001–005 dan 007–010 telah memenuhi kapasitas daya dukung tanpa perlu perbaikan, sedangkan sleeper 006 memerlukan perbaikan dengan metode grouting untuk meningkatkan daya dukung. Hasil analisis juga menunjukkan adanya differential settlement yang tidak memenuhi syarat di antara sleeper 006 dan 007, sehingga direncanakan perbaikan menggunakan metode in-between pile dengan konfigurasi 2x1 pile D350 dan H-Beam 300x300x12x12 sepanjang 8 meter untuk portalnya. Desain FEED awal untuk sleeper 011A–162 menggunakan footplate 1,5x1,5 m dinilai aman namun overdesign, sehingga dilakukan optimasi menjadi 1,4x1,4 m (sleeper 011A–020) dan 1,3x1,3 m (sleeper 021–162). Hasil analisis ulang menunjukkan desain optimasi aman terhadap daya dukung dan settlement serta lebih efisien secara material dan biaya.
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The Open Access development is an oil distribution infrastructure project undertaken by one of the Indonesian companies operating in the oil and gas sector in Kasim. This construction is being built on an area of approximately 80 hectares. During its construction, there were geotechnical challenges, specifically the discrepancy between the foundation design of the pipe sleeper in the initial Front End Engineering Design (FEED) agreement and the Detailed Engineering Design (DED) outcomes. This issue arose because the pipe sleeper foundation design during FEED was based on soil data that was taken too far from the actual pipe location and did not comply with the minimum distance requirements of SNI 8460-2017, article 5.2.4.1.3, table 2. Currently, the pipe sleeper construction uses the shallow foundation design from FEED. However, as construction progressed, it was discovered that some differential settlement values between foundations did not meet the inclination requirement. So when planning DED for the construction of the next section, one of them was main sleeper 1 using land data from investigations by PT. Soilens is in accordance with 8460-2017, the foundation design changes to a deep foundation or minipile. Therefore, in this final project, it is necessary to analyze the reinforcement on the existing foundation that has been built and evaluate the planning of the existing foundation to find out whether the shallow FEED foundation design can still be used for the main sleeper 1 section that has not been built by referring to the correct soil data. If it turns out that the bearing capacity has not been met, additional reinforcement planning is needed. In addition, alternative foundation planning is needed using correct soil data in order to obtain a safe and strong plan. Finally, a material volume analysis is carried out to obtain the most effective planning when viewed in terms of material volume. From the results of the analysis of the existing foundations, sleepers 001–005 and 007 010 have met the bearing capacity without the need for repair, while sleeper 006 requires repair using the grouting method to increase the bearing capacity. The results of the analysis also show that there is a differential settlement that does not meet the requirements between sleepers 006 and 007, so repairs are planned using the in-between pile method with a 2x1 pile D350 configuration and an H-Beam 300x300x12x12 with a length of 8 meters for the portal. The initial FEED design for sleeper 011A–162 using a 1.5x1.5 m footplate was considered safe but overdesigned, so it was optimized to 1.4x1.4 m (sleeper 011A–020) and 1.3x1.3 m (sleeper 021–162). The results of the reanalysis showed that the optimized design was safe for bearing capacity and settlement and was more efficient in terms of material and cost.

Item Type:	Thesis (Other)
Uncontrolled Keywords:	Pondasi, Pipe Sleeper, Pemampatan, Daya Dukung.
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:	Ahmad Dzaki Muflih
Date Deposited:	28 Jul 2025 07:19
Last Modified:	28 Jul 2025 07:19
URI:	http://repository.its.ac.id/id/eprint/122149

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