Analisis Perencanaan Timbunan Menggunakan Common Borrow Material (CBM) Dan Mortar Busa Pada Tanah Kohesif Compressible Dan Tanah Non Kohesif

Saputro, Muhammad Fahrudin Adiansyah (2026) Analisis Perencanaan Timbunan Menggunakan Common Borrow Material (CBM) Dan Mortar Busa Pada Tanah Kohesif Compressible Dan Tanah Non Kohesif. Other thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Pembangunan timbunan jalan dengan ketinggian 6–8 m memberikan beban yang besar terhadap tanah dasar sehingga berpotensi menimbulkan penurunan (settlement) dan permasalahan stabilitas, terutama pada compressible soil. Perbedaan karakteristik antara non-compressible soil dan compressible soil menyebabkan perencanaan timbunan memerlukan pendekatan yang berbeda. Selain Common Borrow Material (CBM) sebagai material timbunan konvensional, mortar busa digunakan sebagai alternatif material ringan untuk mengurangi beban yang diteruskan ke tanah dasar. Penelitian ini bertujuan menganalisis kinerja timbunan menggunakan CBM dan mortar busa pada kedua kondisi tanah berdasarkan aspek pemampatan, rate of settlement, potensi likuifaksi, stabilitas timbunan, serta menentukan material yang paling sesuai secara teknis. Analisis dilakukan pada variasi tinggi timbunan 6–8 m dengan mengevaluasi pemampatan, rate of settlement, potensi likuifaksi, stabilitas timbunan, serta kebutuhan perbaikan tanah menggunakan preloading, Prefabricated Vertical Drain (PVD), geotextile, dan micropile. Hasil penelitian menunjukkan bahwa tanah non-compressible hanya mengalami pemampatan segera, sedangkan compressible soil mengalami pemampatan konsolidasi primer dan sekunder. Analisis juga menunjukkan adanya potensi likuifaksi pada lapisan pasir lepas hingga kedalaman sekitar 7 m. Pada tanah compressible, timbunan menggunakan CBM maupun mortar busa belum memenuhi persyaratan rate of settlement dan stabilitas sehingga memerlukan kombinasi preloading, PVD, serta perkuatan sesuai kebutuhan. Berdasarkan hasil analisis, CBM lebih sesuai digunakan pada tanah non-compressible, sedangkan mortar busa lebih direkomendasikan pada compressible soil karena memiliki berat volume yang lebih rendah sehingga mampu mengurangi beban pada tanah dasar dan memberikan kinerja teknis yang lebih baik.
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The construction of road embankments with heights of 6–8 m imposes significant loads on the subgrade, potentially causing settlement and stability problems, particularly on compressible soils. The differences in the characteristics of compressible and non-compressible soils require different embankment design approaches. In addition to Common Borrow Material (CBM) as the conventional embankment material, foam mortar is proposed as an alternative lightweight fill material to reduce the load transmitted to the underlying soil. This study aims to analyze the performance of embankments constructed using CBM and foam mortar on both soil conditions based on settlement, rate of settlement, liquefaction potential, embankment stability, and to determine the most suitable material from a technical perspective. The analysis was conducted for embankment heights ranging from 6 to 8 m by evaluating settlement, rate of settlement, liquefaction potential, embankment stability, and the required ground improvement methods, including preloading, Prefabricated Vertical Drains (PVD), geotextiles, and micropiles. The results indicate that non-compressible soil experiences only immediate settlement, whereas compressible soil undergoes both primary and secondary consolidation settlement. The analysis also identified liquefaction potential in loose sand layers to a depth of approximately 7 m. On compressible soil, embankments constructed with either CBM or foam mortar did not satisfy the required settlement rate and stability criteria without ground improvement, necessitating a combination of preloading, PVDs, and reinforcement as required. Based on the analysis, CBM is more suitable for non-compressible soils, while foam mortar is recommended for compressible soils due to its lower unit weight, which reduces the load imposed on the subgrade and provides better technical performance.

Item Type:	Thesis (Other)
Uncontrolled Keywords:	Preloading, PVD, Mortar busa, Stabilitas timbunan, Daya dukung tanah, Preloading, Prefabricated Vertical Drain (PVD), Foamed Mortar, Embankment Stability, Soil Bearing Capacity
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 Engineering and Planning > Civil Engineering > 22201-(S1) Undergraduate Thesis
Depositing User:	Muhammad Fahrudin Adiansyah Saputro
Date Deposited:	29 Jul 2026 01:28
Last Modified:	29 Jul 2026 01:28
URI:	http://repository.its.ac.id/id/eprint/138784

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