Mahfudhi, Ahmad Luthfi (2026) Studi Evaluasi Kegagalan Dinding Turap Tipe CCSP Proyek Revetment Sungai Bengawan Solo dan Alternatif Penanganannya. Studi Kasus Desa Lebaksari, Kecamatan Baureno, Bojonegoro. Masters thesis, Institut Teknologi Sepuluh Nopember.
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Abstract
Sungai Bengawan Solo sebagai sungai terpanjang di Pulau Jawa memiliki morfologi yang dinamis, terutama pada daerah tikungan di Desa Lebaksari, Bojonegoro, dimana gerusan tebing sungai terus menggerus lahan pertanian warga. Untuk mengatasi hal tersebut, dibangun struktur revetment menggunakan turap CCSP sepanjang 980 meter. Namun, hanya dalam satu bulan pasca-konstruksi (Desember 2024), turap mengalami keruntuhan besar. kegagalan sepanjang 710 meter, sementara turap sepanjang 270 meter tidak mengalami kegagalan. Penelitian ini bertujuan untuk menganalisis penyebab kegagalan turap dan penyebab turap yang tidak mengalami kegagalan Serta mencari alternatif perbaikan untuk turap yang mengalami kegagalan dan alternatif perkuatan untuk turap yang tidak mengalami kegagalan. Pada kondisi muka air sungai surut dan kondisi tanah yang sudah tergerus, turap pada segmen 1, 2, dan 3 mengalami keruntuhan. Berdasarkan hasil perhitungan, panjang total turap pada segmen 1, 2, dan 3 melebihi panjang total turap eksisting. Momen maksimum yang terjadi pada segmen 1, 2, dan 3 juga melebihi momen crack turap eksisting. Gaya angkur yang terjadi melebihi beban izin tiang, sehingga tiang pancang tercabut. Hal ini yang menyebabkan turap tidak stabil dan mengalami kegagalan. Sedangkan pada segmen 4, panjang total turap, momen maksimum, dan gaya angkur yang terjadi masih memenuhi spesifikasi perencanaan yang disebabkan oleh kondisi tanah yang cukup baik. Hal ini yang menyebabkan turap pada segmen 4 tidak mengalami kegagalan. Data perbaikan menggunakan data yang paling kritis yaitu data tanah segmen 2. Panjang total turap 24 meter dengan momen maksimum 241 ton.m. Perbaikan turap dilakukan menggunakan turap baja tipe LARSSEN 25 dengan dengan subdrain vertikal berupa bronjong. Penambahan Subdrain juga dilakukan pada turap segmen 4 yang tidak mengalami keruntuhan.
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The Bengawan Solo River, the longest river on Java Island, has a dynamic morphology, especially in the bend area in Lebaksari Village, Bojonegoro, where riverbank erosion continues to erode residents' agricultural land. To address this, a 980-meter-long revetment structure was built using CCSP sheet piles. However, just one month after construction (December 2024), the sheet pile experienced a major collapse. 710 meters of failure occurred, while 270 meters of sheet pile did not fail. This study aims to analyze the causes of sheet pile failure and the causes of sheet piles that did not fail. As well as find repair alternatives for sheet piles that failed and reinforcement alternatives for sheet piles that did not fail. When the river water level receded and the soil conditions were already eroded, sheet piles in segments 1, 2, and 3 collapsed. Based on the calculation results, the total length of sheet piles in segments 1, 2, and 3 exceeded the total length of the existing sheet pile. The maximum moment that occurred in segments 1, 2, and 3 also exceeded the cracking moment of the existing sheet pile. The anchor force that occurred exceeded the permissible load of the pile, so that the pile was uprooted. This caused the sheet pile to be unstable and failed. Meanwhile, in segment 4, the total length of the sheet pile, the maximum moment, and the anchor force that occurred still met the planning specifications due to the fairly good soil conditions. This caused the sheet pile in segment 4 not to fail. The repair data used the most critical data, namely the soil data for segment 2. The total length of the sheet pile was 24 meters with a maximum moment of 241 tons.m. The sheet pile repair was carried out using LARSSEN 25 type steel sheet pile with a vertical subdrain in the form of gabions. The addition of subdrains was also carried out on the sheet pile segment 4 which did not collapse.
| Item Type: | Thesis (Masters) |
|---|---|
| Uncontrolled Keywords: | Kegagalan Dinding Turap, Tikungan Sungai, Gerusan, Perkuatan Turap. Retaining Wall Failure, River Bend, Scour, Sheet Pile Reinforcement. |
| Subjects: | T Technology > TA Engineering (General). Civil engineering (General) > TA760+ Retaining walls |
| Divisions: | Faculty of Civil, Planning, and Geo Engineering (CIVPLAN) > Civil Engineering > 22101-(S2) Master Thesis |
| Depositing User: | Ahmad Luthfi Mahfudhi |
| Date Deposited: | 29 Jul 2026 01:52 |
| Last Modified: | 29 Jul 2026 01:52 |
| URI: | http://repository.its.ac.id/id/eprint/139461 |
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