Finite Element Simulation of Vacuum Preloading at Palembang ? Indralaya Toll Project
DOI:
https://doi.org/10.5614/j.eng.technol.sci.2021.53.4.10Keywords:
finite element simulation, instrumentation, numerical analysis, soil improvement, vacuum preloadingAbstract
Methods for the prediction of soil behavior during the application of vacuum preloading are available but have not been used precisely and have not been proven yet in Indonesia. There are two common approaches to vacuum preloading simulation, based on the application of a uniform external load to the vacuum area, and based on suddenly lowering the groundwater level to create vacuum conditions, respectively. This affects the settlement, lateral deformation, and pore pressure predictions. The objective of this research was to improve the prediction of soil behavior based on high-quality field data by using state of the art vacuum preloading simulations. The results were compared with those of a series of instrumentation equipment, i.e. a settlement plate, an extensometer, and a piezometer. This research used data from the Palembang-Indralaya Toll Road, a section of the Trans Sumatera Toll Road that is approximately 22 km long and has an embankment height of about 4 m to 9 m. It was built over a swampy soft soil area, using vacuum preloading to improve the soil. Axisymmetric analysis of vacuum preloading was conducted for a single-drain system, plane-strain analysis was conducted for single- and multiple-drain systems, and 3D analysis was conducted for single-drain, multiple-drain, and cluster-drain systems. The results show that the proposed method produced a good correlation between the predicted data and the recorded monitoring data.
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References
Chai, J.C., Shen, S.L., Miura, N., Bergado & Dennes T., Simple Method of Modelling PVD-Improved Subsoil, Journal of Geotechnical and Geoenvironmental Engineering, 127, ASCE, pp. 965-972, November 2001.
Dermawan, Herwan, Irysam, M., Hutapea, B., Susila, E., Rizal, S. & Idwan, S., Value of Settlement Ratio in Soil Improvement Works with Vacuum Preloading Technique, Geotechnical Challenge for Mega Infrastructures, Proceeding 20th Southeast Asian Geotechnical Conference, 3rd AGSEA Conference, 22nd HATTI Annual Scientific Meeting, pp. 368-371, 2018. (Text in Indonesian)
Hansbo, S., Consolidation of Fine-grained Soils by Prefabricated Vertical Drain, Online Library of International Society for Soil Mechanics and Geotechnical Engineering, pp. 677-682, 1981.
Hansbo, S., Experience of Consolidation Process from Test Area with and Without Vertical Drains, Ground Iprovement Case Histories, 3, Elsevier, pp. 3-49, 2005.
Indraratna, B. & Redana, I.W., Numerical Modelling of Vertical Drains with Smear and Well Resistance Installed in Soft Clay, Canadian Geotechnical Journal, 7, pp. 132-145, 2000.
Indraratna, B., Rujikiatkamjorn, C. & Sathananthan, I., Analytical and Numerical Solutions for a Single Vertical Drain, Including the Effect of Vacuum Preloading, Canadian Geotechnical Journal, 42, pp. 994-1014, 2005.
Indraratna, B. & Rujikiatkamjorn, C., Analysis of Radial Vacuum-Assisted Consolidation using 3D Finite Element
Method, Proceeding of GeoDenver, Colorado ASCE Special Publication, 2007.
Irsyam, M., Dermawan, H., Sutjipto, M.R., Hutapea, B.M. & Susila, E., The Alternative Ground Improvement for Embankment on Soft Soil in Palindra Toll Road, International Conference on Problematic Soils, Soft Soils 2016, pp. A10?1-A10?6, 2016.
Irsyam, M., Krisnanto, S. & Wardhani, S.P.R., Instrumented Full Scale Test and Numerical Analysis to Investigate Performance of Bamboo Pile-Mattress System as Soil Reinforcement for Coastal Embankment on Soft Clay, Liu, Deng, and Chu (eds.) @2008, Science Press Beijing and Springer-Verlag GmbH Berlin Heidelberg, Geotechnical Engineering for Disaster Mitigation and Rehabilitation, 2008.
Kjellman, W., Consolidation of Clay Soil by Means of Atmospheric Pressure, Proc. of Conference on Soil Stabilization, Cambridge, Mass., pp. 258-263, 1952.
Nghia, N.T., Modelling of a Vacuum Consolidation Project in Vietnam, Journal of Science Ho Chi Minh City Open University, 9(2), pp. 67-84, 2019.
Rujikiatkamjorn, C. & Indraratna, B., Chu, J., 2D and 3D Numerical Modeling of Combined Surcharge and Vacuum Preloading with Vertical Drain, International of Geomechanics, 8(2), pp. 144-156, ASCE 2008, 2008.
Saowapakpiboon, J., Bergado, D.T., Voottipruex, P., Lam, L.G. & Nakakuma, K., PVD Improvement Combined Surcharge and Vacuum Preloading Including Simulation, Journal Geotextiles and Geomembranes, 29, Elsevier, pp. 74-82, 2011.
Susila, E., Agrensa, F., Case Study on Soft Soil Improvement Using Innovative and Cost-effective Reinforcing Technique, Journal of Technology and Science, 47(2), pp. 207-217, 2015.
Toha, F.X., Post Preloading Creep Properties of Highly Compressible Harbor Marine Sediments, Journal of Technology and Science, 49(2), pp. 163-178, 2017.
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