Purwantoro, Bagas Dwi (2026) Analisis Kinerja Kedalaman Replacement Dan Cakar Ayam Modifikasi Sebagai Solusi Optimasi Penanganan Timbunan Di Atas Tanah Lunak Di Jalan Tol Trans Sumatera Ruas Betung (Sp Sekayu) - Tempino - Jambi Seksi 1B Sta 43+225 - 43+375. Masters thesis, Institut Teknologi Sepuluh Nopember.
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Abstract
Pembangunan Jalan Tol Betung – Jambi Seksi 1B (Betung – Tungkal Jaya) menghadapi tantangan besar karena tanah lunak dengan daya dukung rendah, kompresibilitas tinggi, dan permeabilitas rendah. Salah satu masalah utama adalah penanganan timbunan di atas tanah lunak yang berisiko mengalami penurunan berlebih dan tidak seragam. Dimana kedalaman tanah lunak yang ada di lokasi tinjauan mencapai 8 meter dengan muka air tanah di kedalaman 0 meter dan akan dibangun timbunan di atasnya dengan ketinggian antara 3 meter hingga 5 meter. Metode penggantian tanah (soil replacement) sering digunakan untuk mengatasi masalah ini, namun memiliki beberapa kelemahan. Penggantian tanah memerlukan biaya yang tinggi untuk penggalian dan penggantian material, serta dampak lingkungan yang besar, seperti kerusakan lokasi sumber material dan masalah pengelolaan limbah tanah. Selain itu, meskipun telah dilakukan penggantian, penurunan jangka panjang tetap dapat terjadi. Hasil analisis menunjukkan bahwa peningkatan ketebalan replacement hingga 2,0 meter efektif mereduksi total penurunan, namun secara mandiri belum mampu memenuhi syarat batas laju penurunan <2 cm/tahun dan <10cm/10tahun. Penggunaan sistem CAM terbukti lebih unggul karena mampu mendistribusikan beban secara lebih merata dan memberikan efek penundaan (delay time). Selain itu, CAM secara signifikan meningkatkan faktor keamanan hingga di atas 1,5, terutama pada timbunan lebih rendah, serta menjaga stabilitas penurunan diferensial di bawah ambang batas 0,3%. Sebagai solusi akhir untuk memenuhi seluruh kriteria teknis, diperlukan kombinasi antara CAM atau replacement dengan metode Prefabricated Vertical Drain (PVD) guna mempercepat proses konsolidasi.
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The construction of the Betung – Jambi Toll Road Section 1B (Betung – Tungkal Jaya) faces significant challenges due to soft soil with low bearing capacity, high compressibility, and low permeability. One of the main issues is the handling of embankments on soft soil, which is at risk of excessive and uneven settlement. Where the depth of the soft soil at the review site reaches 8 meters with the groundwater level at a depth of 0 meters, and a fill will be constructed on top of it with a height between 3 meters and 6 meters. The soil replacement method is commonly used to address this issue; however, it has several drawbacks. Soil replacement requires high costs for excavation and material replacement, along with significant environmental impacts, such as damage to material source locations and waste soil disposal problems. Furthermore, even with soil replacement, long-term settlement may still occur. The analysis results show that increasing the thickness of the replacement to 2.0 meters effectively reduces total settlement, but alone is not able to meet the requirements of the settlement rate limit of <2 cm/year and <10 cm/10 years. The use of the CAM system has proven to be superior because it is able to distribute the load more evenly and provides a delay effect. In addition, CAM significantly increases the safety factor to above 1.5, especially on lower embankments, and maintains the stability of differential settlement below the threshold of 0.3%. As a final solution to meet all technical criteria, a combination of CAM or replacement with the Prefabricated Vertical Drain (PVD) method is required to accelerate the consolidation process.
| Item Type: | Thesis (Masters) |
|---|---|
| Uncontrolled Keywords: | Replacement tanah, Cakar Ayam Modifikasi, laju penurunan, stabilitas timbunan, Plaxis 2D. Soil replacement, Modified Chicken Foot, rate of settlement, embankment stability, Plaxis 2D. |
| Subjects: | T Technology > TA Engineering (General). Civil engineering (General) > TA455.S6 Soil (Materials of engineering and construction) |
| Divisions: | Faculty of Civil, Planning, and Geo Engineering (CIVPLAN) > Civil Engineering > 22101-(S2) Master Thesis |
| Depositing User: | Bagas Dwi Purwantoro |
| Date Deposited: | 26 Jan 2026 06:44 |
| Last Modified: | 26 Jan 2026 06:44 |
| URI: | http://repository.its.ac.id/id/eprint/130374 |
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