PEMODELAN PERBAIKAN TANAH LUNAK DENGAN PRELOADING, DEEP MIXING COLUMN, DAN STONE COLUMN
Article Sidebar
Read Counter : 6
Download : 2
Main Article Content
Abstract
Soft soil is one of the soils with low bearing capacity and high compressibility. One of the soft soil improvement methods that can be used is Deep Mixing Column and Stone Column. This study combines preloading with Deep Mixing Column and Stone Column, which aims to determine the most effective repair method in reducing settlement and consolidation time. As well as knowing the effect of depth and distance between rectangular patterned columns on settlement and consolidation time using Plaxis 2D. The modeled column is 0.8 m in diameter with variation of distance 1D; 2D; 5D; and 10D and variation of depth 25%; 50%; 75%; and 100% of the soft soil thickness. The results showed that the Deep Mixing Column was more effective in reducing the settlement, with an effectiveness of 38%-80%. Meanwhile, Stone Column is more effective in reducing consolidation time, with an effectiveness of 53%-99%. The deeper and more closely spaced the Deep Mixing Column and Stone Column are applied, then the smaller the decline and the shorter the consolidation time.
Abstrak
Tanah lunak merupakan salah satu tanah dengan daya dukung rendah dan memiliki pemampatan yang besar. Metode perbaikan tanah lunak yang dapat digunakan salah satunya Deep Mixing Column dan Stone Column. Penelitian ini mengkombinasikan preloading dengan Deep Mixing Column maupun Stone Column, yang bertujuan untuk mengetahui metode perbaikan yang paling efektif dalam mereduksi penurunan dan waktu konsolidasi. Serta mengetahui pengaruh kedalaman dan jarak antar kolom berpola rectangular terhadap penurunan dan waktu konsolidasi dengan menggunakan Plaxis 2D. Kolom yang dimodelkan berdiameter 0,8 m dengan variasi jarak 1D; 2D; 5D; dan 10D serta variasi kedalaman 25%; 50%; 75%; dan 100% dari tebal tanah lunaknya. Hasil penelitian menunjukkan bahwa Deep Mixing Column lebih efektif dalam mereduksi penurunan, dengan efektifitas 38%-80%. Sedangkan Stone Column lebih efektif dalam mereduksi waktu konsolidasi, dengan efektifitas 53%-99%. Semakin dalam dan rapat spasi Deep Mixing Column maupun Stone Column yang diaplikasikan, maka penurunan semakin kecil serta waktu konsolidasi semakin singkat.
Article Details
This work is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International License.
This work is licensed under Jurnal Mitra Teknik Sipil (JMTS) Creative Commons Attribution-ShareAlike 4.0 International License.References
Badan Standardisasi Nasional. (2017). Persyaratan perancangan geoteknik (SNI 8460-2017). http://sispk.bsn.go.id/SNI/DaftarList
Etezad, M., Hanna, A. M., & Ayadat, T. (2015). Bearing capacity of a group of stone columns in soft soil. International Journal of Geomechanics, 15 (2), 04014043.
Firmansyah, D. A., Somantri, A. K., Sihombing, A. V. R., Mase, L. Z., & Sundara, A. (2024). Mechanical properties of soft clay soil improved with nanomaterials and chitosan biopolymer. Geotechnical Engineering Journal of the SEAGS & AGSSEA, 55(2), 31-37.
Gomes, R., & Darjanto, H. (2022). Soil improvement using the stone column method at the International Port of Tibar, Timor-Leste. International Journal of Transportation and Infrastructure, 6(1), 34-38.
Greenwood, D. A. (1970). Mechanical improvement of soils below ground surface. Ground engineering (pp. 11–22). Thomas Telford Publishing.
Gupta, S., & Kumar, S. (2023). A state-of-the-art review of the deep soil mixing technique for ground improvement. Innovative Infrastructure Solutions, 8(4), 129.
Hamzah, Y. S. (2023). Analisis Waktu Penurunan pada konsolidasi tanah menggunakan kombinasi metode preloading dan prefabricated vertical drain (PVD) pada pekerjaan perbaikan tanah. Portal: Jurnal Teknik Sipil, 15(2), 102-108.
Han, J. (2015). Pinciples and practice of ground improvement. John Wiley & Sons, Inc. New Jersey.
Hardiyatmo, H. C. (2012). Mekanika Tanah 2 Edisi V. Gadjah Mada University Press. Yogyakarta, Indonesia.
Iskandar, F. F., & Hamdhan, I. N. (2016). Pemodelan numerik pada perbaikan tanah menggunakan stone column di tanah lempung lunak di bawah tanah timbunan. RekaRacana: Jurnal Teknil Sipil, 2(1), 107-118.
Kitazume, M., & Terashi, M. (2013). The deep mixing method. Leiden: CRC Press.
Setiawan, B., Chrismaningwang, G., & Denaldi, D. A. (2023). Analisis percepatan konsolidasi tanah lunak dengan metode preloading menggunakan software GeoStudio 2018 R2. Matriks Teknik Sipil. 11(3), 245-253.