Febriansyah, Muhammad Alfin (2026) Perencanaan Kombinasi Timbunan Tanah dan Mortar Busa Sebagai Pengganti Konstruksi Existing Slab on Pile, Studi Kasus: Oprit Jembatan Jalan Tol Krian–Legundi–Bunder–Manyar (KLBM) STA 9+775 – STA 10+188 dan STA 10+635 – STA 10+829. Other thesis, Institut Teknologi Sepuluh Nopember.
![[thumbnail of 5012221033-Undergraduate_Thesis.pdf]](http://repository.its.ac.id/style/images/fileicons/text.png) |
Text
5012221033-Undergraduate_Thesis.pdf - Accepted Version Restricted to Repository staff only Download (22MB) | Request a copy |
Abstract
Jalan Tol Krian–Legundi–Bunder–Manyar (KLBM) memiliki segmen jembatan sepanjang 447 meter (STA 10+188–STA 10+635) dengan oprit jembatan existing yang menggunakan sistem pile slab. Oprit tersebut berdiri di atas lapisan tanah lunak (soft–medium clay) hingga kedalaman 8 meter yang berpotensi menyebabkan penurunan konsolidasi besar serta ketidakstabilan lereng. Tugas Akhir ini bertujuan untuk mengevaluasi volume dan biaya struktur pile slab existing serta merencanakan alternatif desain oprit berupa timbunan kombinasi tanah dan mortar busa (variasi 0%, 20%, 40%, dan 60%) pada oprit sisi selatan (STA 9+775–STA 10+188) dan utara (STA 10+635–STA 10+829) dengan perbaikan tanah menggunakan Prefabricated Vertical Drain (PVD), serta perkuatan micropile atau geotextile. Hasil analisis menunjukkan bahwa struktur pile slab existing membutuhkan total biaya sebesar Rp51.683.640.504,57, dengan rincian Rp36.019.092.038,85 untuk oprit selatan dan Rp15.664.548.465,72 untuk oprit utara. Pada perencanaan alternatif, konfigurasi PVD terpilih pola segi empat dengan spasi 1,0 m (oprit sisi selatan) dan 1,5 m (oprit sisi utara) mampu mempercepat konsolidasi hingga mencapai derajat 90% masing-masing pada minggu ke-22 dan ke-16. Peningkatan persentase mortar busa terbukti efektif mereduksi tinggi awal timbunan dan memperkecil besar pemampatan, serta menekan kebutuhan material perkuatan secara signifikan. Berdasarkan analisis biaya, perencanaan timbunan dengan perkuatan geotextile pada variasi mortar busa 0% (100% tanah) disimpulkan sebagai alternatif paling efisien. Opsi ini membutuhkan total biaya sebesar Rp22.977.796.759,28 pada oprit selatan dan Rp22.355.864.974,69 pada oprit utara. Secara akumulatif, alternatif timbunan membutuhkan total biaya proyek sebesar Rp45.333.661.733,97, sehingga terbukti lebih ekonomis dengan menghemat anggaran sebesar Rp6.349.978.770,61 jika dibandingkan dengan struktur pile slab existing.
======================================================================================================================================
The Krian–Legundi–Bunder–Manyar (KLBM) Toll Road features a 447-meter bridge segment (STA 10+188–STA 10+635) with an existing bridge approach that utilizes a pile slab system. This approach structure is constructed over a soft-to-medium clay layer extending to a depth of 8 meters, posing risks of significant consolidation settlement and slope instability. This Final Project aims to evaluate the volume and cost of the existing pile slab structure and to design alternative approach configurations using combined soil and lightweight foam mortar embankments (with foam mortar variations of 0%, 20%, 40%, and 60%) for both the south (STA 9+775–STA 10+188) and north (STA 10+635–STA 10+829) approaches. The alternative designs incorporate ground improvement using Prefabricated Vertical Drains (PVD) combined with either micropile or geotextile reinforcement. The analysis indicates that the existing pile slab structure requires a total cost of IDR 51,683,640,504.57, comprising IDR 36,019,092,038.85 for the south approach and IDR 15,664,548,465.72 for the north approach. For the alternative design, the selected PVD configuration is a square pattern with a spacing of 1.0 m for the south approach and 1.5 m for the north approach, which accelerates consolidation to achieve a 90% degree of consolidation by the 22nd and 16th weeks, respectively. Increasing the percentage of foam mortar is proven effective in reducing the required embankment height, minimizing settlement magnitude, and significantly decreasing the need for reinforcement materials. Based on the cost analysis, the embankment design reinforced with geotextiles at a 0% foam mortar variation (100% soil) is concluded to be the most cost-effective alternative. This option requires a total cost of IDR 22,977,796,759.28 for the south approach and IDR 22,355,864,974.69 for the north approach. In terms of cumulative project cost, the alternative embankment design requires a total of IDR 45,333,661,733.97, proving to be more economical by saving IDR 6,349,978,770.60 compared to the existing pile slab structure.
| Item Type: | Thesis (Other) |
|---|---|
| Uncontrolled Keywords: | Geotextile, Micropile, Mortar Busa, Oprit Jembatan, Pile Slab, Prefabricated Vertical Drain (PVD), Bridge Approaches, Foamed Mortar, Geotextile, Micropile, Pile Slab, Prefabricated Vertical Drain (PVD) |
| Subjects: | T Technology > TA Engineering (General). Civil engineering (General) T Technology > TA Engineering (General). Civil engineering (General) > TA749 Soil stabilization T Technology > TG Bridge engineering |
| Divisions: | Faculty of Civil, Planning, and Geo Engineering (CIVPLAN) > Civil Engineering > 22201-(S1) Undergraduate Thesis |
| Depositing User: | Muhammad Alfin Febriansyah |
| Date Deposited: | 29 Jul 2026 01:17 |
| Last Modified: | 29 Jul 2026 01:17 |
| URI: | http://repository.its.ac.id/id/eprint/138773 |
Actions (login required)
 |
View Item |