Amalia, Tyas Nur and Oktavianto, Angger Dwi and Septiasari, Rizki Fatimah (2014) Pengaruh Pengeringan Dan Pembasahan Tanah Tanggul Sungai Bengawan Solocross Section (0-+000), Desa Semambung, Bojonegoro Dengan Stabilisasi Tanah Secara Kimia Dengan Bahan Stabilisasi Kapur, Fly Ash, Dan Mikro Biobakteri. Other thesis, Institut Teknologi Sepuluh Nopember.
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Abstract
Berdasarkan letak geografis, Indonesia terletak pada daerah beriklim tropis. Hal tersebut mengakibatkan Indonesia memiliki perubahan iklim yang cukup tinggi antara musim kemarau dan musim hujan, sehingga menyebabkan terjadinya proses pengeringan dan pembasahan secara berulang. Proses pengeringan dan pembasahan secara berulang dapat mempengaruhi karakteristik tanah itu sendiri, karena terjadinya perubahan volume tanah yang disebabkan oleh perubahan kadar air suatu tanah.Tanah tanggul yang berada di Sungai Bengawan Solo Cross Section (0000), Desa Semambung, Bojonegoro telah mengalami perubahan karakteristik tanah dan kekuatan tanah menurun, penyebabnya adalah perubahan musim hujan dan kemarau yang signifikan. Sehingga perlu adanya stabilisasi tanah tanggul sungai dengan bahan tambah kapur, fly ash, dan mikro biobakteri. Pengujian karakteristik tanah secara fisik meliputi kadar air (wc), derajat kejenuhan (Sr), porositas (n), angka pori (e), Specific Gravity (Gs) dan batas Atterberg (LL, PL, PI). Sifat mekanik meliputi kohesi (c), sudut geser dalam (φ) dan tegangan air pori negatif (-Uw). Sifat dinamik meliputi modulus geser (Gmaks). Penelitian ini menitikberatkan pengaruh proses pengeringan dan pembasahan (siklus pertama dan kedua) dan juga proses pengeringan berulang (1 kali, 2 kali, 4 kali, dan 6 kali) terhadap sifat fisik, mekanik dan dinamik tanah pada tanah natural serta pada tanah yang distabilisasi dengan bahan stabilisasi kapur, fly ash, dan mikro biobakteri. Adanya penambahan stabilisator pada tanah natural diduga menjadi penyebab perubahan struktur dari partikel yang halus ke partikel yang paling besar. Pengurangan partikel halus dan penambahan partikel kasar juga diduga menjadi penyebabkan nilai batas cair (LL) berkurang dan batas plastis (PL) meningkat. Dari ketiga stabilisator yang digunakan, penambahan 8% kapur yang menyebabkan penurunan partikel halus, nilai batas cair (LL), dan peningkatan batas plastis yang paling besar. Berikut ini merupakan persentase peningkatan nilai berat volume kering (γd), kohesi (Cu), tegangan air pori negatif (-Uw), dan modulus geser maksimum (Gmax) dari perbandingan proses pengeringan berulang (proses drying ke-1 hingga drying ke-6) dalam kadar air yang sama (32%) antara tanah natural dengan tanah + 8% kapur sebesar 3.801%, 400.741%, 17.119% (mengalami penurunan), dan 159.179%. Untuk perbandingan tanah natural dengan tanah + 15% fly ash memiliki persentase sebesar 7.77%, 88.526%, 16.637%, dan 33.260%. Untuk perbandingan tanah natural dengan tanah + 5% mikro biobakteri memiliki persentase sebesar 6.221%, 90.409%, 11.453%, dan 44.404%.
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Based on geographical location, Indonesia is located in the tropics climate. It lead to Indonesia has a fairly high climate change between the dry season and the rainy season, so it making the drying and wetting process is repeated. The repeatedly of drying and wetting processes can affect the characteristics of the soil itself, due to the volume changes caused by changes in the moisture content of a soil Soil embankments on the Bengawan Solo River Cross Section (0 000), Semambung, Bojonegoro has undergone changes in soil characteristics and strength decreases, the cause is changes in the dry and rainy season are significant. Therefore it is necessary to stabilize the river embankment soil with added lime materials, fly ash, and micro biobactery. The physical characteristics of the soil testing include water content (wc), the degree of saturation (Sr), porosity (n), void ratio (e), Specific Gravity (Gs) and Atterberg limits (LL, PL, PI). Mechanical properties testing include cohesion (cu), the shear angle () and the pore water pressure is negative (-Uw). Dynamical properties include shear modulus (Gmaks). This research emphasizes the effect of drying and wetting process (first and second cycle) and also the repeated drying process (1 time, 2 times, 4 times, and 6 times) on physical, mechanical and dynamic soil in natural soil and the soil stabilized with lime stabilization materials, fly ash, and micro biobactery. The addition of stabilizers on the ground of natural estimate causes structural changes in the fine particles into larger particles most. Reduction of fine particles and coarse particles lead to value addition of liquid limit (LL) is reduced and the plastic limit (PL) increases. Of the three stabilizers are used, the addition of 8% lime which causes a decrease in fine particles, the value of liquid limit (LL), plastic limit and increased the most. The following is the increase percentage in the value of the volume of dry weight (γd), cohesion (cu), negative pore water pressure (-Uw), and the maximum shear modulus (Gmaks) of the comparison of repeated drying process (drying process drying 1st to 6th) in the same water content (32%) between the natural soil with the soil + 8% lime was 3.801%, 400.741%, 17.119% (decreased), and 159.179%. For comparison with the natural soil with the soil + 15% fly ash has a percentage of 7.77%, 88.526%, 16.637%, dan 33.260%.For comparison with the natural soil with the soil + 5% Micro biobactery have a percentage of 6.221%, 90.409%, 11.453%, dan 44.404%.
| Item Type: | Thesis (Other) |
|---|---|
| Additional Information: | RSS 624.151 363 Ama p-2014 |
| Uncontrolled Keywords: | Siklus pengeringan dan pembasahan, proses pengeringan berulang, sifat fisik, sifat mekanik, sifat dinamik, stabilisasi dengan kapur, stabilisasi dengan fly ash, stabilisasi dengan mikro biobakteri, The cycle of drying and wetting, repeated drying process, physical properties, mechanical properties, dynamic properties, with lime stabilization, stabilization with fly ash, stabilization with micro biobactery. |
| Subjects: | T Technology > TA Engineering (General). Civil engineering (General) > TA455.S6 Soil (Materials of engineering and construction) |
| Divisions: | Faculty of Civil Engineering and Planning > Civil Engineering > 22201-(S1) Undergraduate Thesis |
| Depositing User: | Mr. Marsudiyana - |
| Date Deposited: | 23 Jun 2023 06:34 |
| Last Modified: | 23 Jun 2023 06:34 |
| URI: | http://repository.its.ac.id/id/eprint/98213 |
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