Saputra, Novema Dwi (2024) Stabilisasi Tanah Residual Dengan Fly Ash Dan Bottom Ash (Faba) Untuk Perbaikan Lapisan Subgrade Dan Timbunan Jalan Pada Pekerjaan Jalan Tol Ruas Padang - Sicincin Sta. 27+000 – Sta. 27+400. Masters thesis, Institut Teknologi Sepuluh Nopember.
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Abstract
Pemanfaatan tanah residual pada Proyek Pembangunan Jalan Tol Trans Sumatera Ruas Padang – Sicincin ditemukan jenis tanah residual pada Sta. 27+000 – 27 + 400 sebagai timbunan jalan dan subgrade dapat dilakukan dengan metode stabilisasi dimana material stabilisasi yang digunakan yaitu campuran Fly Ash, Bottom Ash dan FABA (Fly Ash Bottom Ash). Agar dapat diperoleh persentase Fly Ash, Bottom Ash atau FABA (Fly Ash Bottom Ash) yang optimum dalam meningkatkan perilaku tanah, maka akan dipilih variasi 10%, 15% dan 20% terhadap berat kering tanah dengan masa pemeraman 0 hari, 7 hari dan 14 hari. Selanjutnya dilakukan simulasi dengan menggunakan program Plaxis 2D pada campuran yang optimum. Berdasarkan hasil analisi diperoleh bahwa dengan dilakukan stabilisasi (Fly Ash, Bottom Ash atau FABA) memberikan hasil perubahan sifat fisik dan mekanik tanah residual dengan peningkatan nilai CBR pada penambahan Fly Ash kadar 10% dengan nilai CBR = 4,02%, Bottom Ash kadar 20% dengan nilai CBR = 9,49% dan FABA sebesar 20% dengan nilai CBR = 14,32 % sehingga tanah yang distabilisasi dapat digunakan sebagai tanah timbunan biasa ataupun tanah timbunan pilihan. Selain itu diperoleh stabilisasi tanah maksimum dengan peningkatan nilai safety factor pada tanah timbunan yang distabilisasi dari tanah timbunan biasa. Stabilitas tanah timbunan yang menggunakan tanah terstabilisasi menggunakan Fly Ash 10%, Bottom Ash 20% dan FABA 20%, diperoleh kondisi optimum terhadap stabilitas lereng timbunan (nilai SF) dengan desain kemiringan slope 1:2 dan 1:4 pada variasi tinggi timbunan 1-meter, 2-meter dan 3-meter. Daya dukung tanah dasar (subgrade) dengan replacement menggunakan tanah yang distabilisasi pada kedalaman 25 cm dan 100 cm diperoleh kondisi stabilitas optimum terhadap stabilitas lereng timbunan (nilai SF) pada tanah yang distabilisasi dengan bottom ash 20% dengan masa peram 7 hari dan FABA 20% dengan masa peram 14 hari.
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Utilization of residual soil in the Trans Sumatra Toll Road Construction Project Padang - Sicincin Section found residual soil types at Sta. 27+000 - 27 + 400 as road embankment and subgrade can be done by stabilization method where the stabilization material used is a mixture of Fly Ash, Bottom Ash and FABA (Fly Ash Bottom Ash). In order to obtain the optimum percentage of Fly Ash, Bottom Ash or FABA (Fly Ash Bottom Ash) in improving soil behavior, variations of 10%, 15% and 20% of the dry weight of the soil with a curing period of 0 days, 7 days and 14 days will be selected. Furthermore, simulation is carried out using the Plaxis 2D program on the optimum mixture. Based on the results of the analysis, it is found that stabilization (Fly Ash, Bottom Ash or FABA) results in changes in the physical and mechanical properties of residual soil with an increase in the CBR value in the addition of Fly Ash at 10% with a CBR value = 4.02%, Bottom Ash at 20% with a CBR value = 9.49% and FABA at 20% with a CBR value = 14.32% so that the stabilized soil can be used as ordinary backfill soil or preferred backfill soil. In addition, maximum soil stabilization was obtained with an increase in the safety factor value of the stabilized embankment soil from the ordinary embankment soil. The stability of embankment soil was assessed through the utilization of stabilized soil incorporating 10% Fly Ash, 20% Bottom Ash, and 20% FABA. Optimal conditions were achieved for embankment slope stability (SF value) with slope designs of 1:2 and 1:4, considering various embankment heights ranging from 1 meter to 3 meters. Bearing capacity of the subgrade with replacement using stabilized soil at depths of 25 cm and 100 cm resulted in optimal stability conditions for embankment slope stability (SF value). This was achieved through stabilization with 20% bottom ash with a curing period of 7 days and 20% FABA with a curing period of 14 days.
| Item Type: | Thesis (Masters) |
|---|---|
| Uncontrolled Keywords: | Stabilisasi tanah, tanah residual, fly ash, bottom ash, FABA, Soil stabilization, residual soil |
| 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) > TA749 Soil stabilization |
| Divisions: | Faculty of Civil, Planning, and Geo Engineering (CIVPLAN) > Civil Engineering > 22101-(S2) Master Thesis |
| Depositing User: | Novema Dwi Saputra |
| Date Deposited: | 06 Feb 2024 03:47 |
| Last Modified: | 06 Feb 2024 03:47 |
| URI: | http://repository.its.ac.id/id/eprint/106166 |
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