Fauzi, Bimayantya Taufiqur Rachman (2022) Pengaruh Banjir Sungai Konaweha Terhadap Kestabilan Badan Jalan (Studi Kasus Ruas Jalan Bts. Kab. Konawe Utara/ Kab. Konawe - Pohara Km. 29+800). Masters thesis, Institut Teknologi Sepuluh Nopember.
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Abstract
Telah terjadi kelongsoran badan jalan akibat gerusan Sungai Konaweha pada 2 lokasi berbeda dalam kurun waktu yang berderkatan. Longsoran pertama terjadi pada bulan Agustus 2018 pada Ruas Jalan Pohara – Batas Kota Kendari Km 22+000. Lokasi tersebut sudah selesai dilakukan perbaikan. Lokasi kedua terjadi pada Ruas Jalan Bts. Kab. Konawe Utara/ Kab. Konawe – Pohara Km 29+300 sd Km 29+800. Titik longsor paling parah terjadi pada Km 29+800 dimana hampir separuh badan jalan tidak dapat dilewati. Saat ini lokasi tersebut telah dilakukan penanganan sementara dengan penimbunan tanah yang diperkuat cerucuk.
Prinsip dasar preservasi jalan adalah penanganan yang tepat untuk kondisi jalan yang tepat pada waktu yang tepat. Untuk menentukan penanganan yang tepat pada lokasi kedua, maka dilakukan penelitian kestabilan lereng akibat pengaruh scouring banjir Sungai Konaweha. Pemodelan banjir dan scouring dilakukan dengan bantuan software HEC-RAS selanjutnya analisis kestabilan badan jalan menggunakan software PLAXIS.
Safety factor lereng eksisting saat ini sebesar 1,187. Debit banjir Sungai Konaweha untuk kala ulang 10 tahun, 25 tahun dan 50 tahun adalah sebesar 3.103 m3/det, 3.551 m3/det dan 3.883 m3/det. Penurunan safety factor lereng dipengaruhi
scouring akibat debit banjir tersebut yaitu 0,51%, 0,93% dan 1,35%. Kestabilan lereng saat ini kritis dan perlu dilakukan perkuatan lereng.
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There has been a landslide of the mainroad due to erosion of Konaweha River at 2 different locations in a period time. The first location occurred in August 2018 on Road Pohara– Kendari City Km 22+000. Nowadays, that location has been
reconstructed. The second location occurred on Road Border Reg. North Konawe/ Reg. Konawe – Pohara Km. 29+300 until Km. 29+800. The most critical location occurred at Km. 29+800 where almost half mainroad could not be passed. Currently, the location has been temporarily handled by landfilling with timber pile.
Basic principle of road preservation is right construction for right road conditions at right time. To determine the appropriate construction at the second location, research was carried out on slope stability due to the influence of flood scouring on the Konaweha River was carried out. Flooding and scouring model using HEC-RAS software and then road stability analysis using the PLAXIS software.
The safety factor of the existing slope is 1.187. Flood discharges of the Konaweha River for the 10-year, 25-year and 50-year return periods are 3.103 m3/s, 3.551 m3/s and 3.883 m3/s. The decrease in slope safety factor was influenced by scouring due to the flood discharge: 0.51%, 0.93% and 1.35%. Slope stability is currently critical and slope reinforcement is needed.
| Item Type: | Thesis (Masters) |
|---|---|
| Uncontrolled Keywords: | Sungai Konaweha, erosi, longsor, stabilitas, Konaweha River, scouring, landslide, stability |
| Subjects: | T Technology > TA Engineering (General). Civil engineering (General) > TA347 Finite Element Method T Technology > TA Engineering (General). Civil engineering (General) > TA749 Soil stabilization T Technology > TE Highway engineering. Roads and pavements > TE175 Road and highway design |
| Divisions: | Faculty of Civil, Planning, and Geo Engineering (CIVPLAN) > Civil Engineering > 22101-(S2) Master Thesis |
| Depositing User: | Bimayantya Taufiqur Rachman Fauzi |
| Date Deposited: | 04 Feb 2022 07:30 |
| Last Modified: | 31 Oct 2022 03:03 |
| URI: | http://repository.its.ac.id/id/eprint/92798 |
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