Soil Improvement Technique for Pilot Section as New Railway Project in Libya
DOI:
https://doi.org/10.36602/ijeit.v9i-.115Keywords:
Geogrid, Settlement, Embankments, Stone Column, ConsolidationAbstract
The construction of embankments on soft saturated soils can be a challenge due to the low shear strength and high compressibility of these soils. The application of reinforced and pile-supported embankments to sustain the imposed dead and traffic loads for train speeds of up to 250 km/h is recently growing in Libya. The aim of this study examine the performance of Geogrid-reinforced embankments with Vibro- stone columns as a ground improvement method adopted in "Pilot Section Al Khoms" subject to cyclic loadings that are applied over a specific area of the embankment to improve strength and provide a safe and economical design for the whole coastal railway. The main result from the load plate test indicates that the stringent performance requirements of the new railway project were met. Furthermore, it was observed that with an increasing number of reinforcement Geogrid layers, enormous cycles of loading could be applied without experiencing excessive deformation and an important reduction in the stress and settlement on the subgrade. The results from field experience, show the project was completed on time and the ground improvement method adopted was employed successfully to reduce the costs of construction maintenance of embankments in the high-speed railway project.
Downloads
References
Atalar, C., Das, B.M., Shin, E.C. and Kim, D.H., “Settlement of geogrid-reinforced railroad bed due to cyclic load,” In International Conference on soil mechanics and geotechnical engineering, pp. 2045-2048. 2001.
[2] Heitz, C., “Bodengewölbe unter ruhender und nichruhender Belastung bei Berücksichtigung von Bewehrungseinlagen aus Geogittern,” Schriftenreihe Geotechnik, Universität Kassel, Issue 19, 2006.
[3] Kempfert, H. G., Lüking, J., & Gebreselassie, B., “Dimensioning of reinforced earth bodies on point-shaped support members with special boundary conditions,” 11. Information and lecture event on "Plastics in Geotechnics, 35-43, 2008.
[4] Tingle, J.S. and Webster, S.L., “Review of corps of engineers design of geosynthetic reinforced unpaved roads,” Annual meeting CD-ROM, TRB, Washington, D.C., 2003.
[5] Shin, E.C., Kim, D.H. and Das, B.M., “Geogrid-reinforced railroad bed settlement due to cyclic load,” Geotechnical & Geological Engineering, 20(3), pp.261-271, 2002.
[6] Tan, S.A., Chew, S.H. and Wong, W.K., “Sand–geotextile interface shear strength by torsional ring shear tests,” Geotextiles and Geomembranes, 16(3), pp.161-174, 1998.
[7] Afshar, Javad Nazari, and Mahmoud Ghazavi. “Experimental studies on bearing capacity of geosynthetic reinforced stone columns,” Arabian Journal for Science and Engineering 39, no. 3, 1559-1571. 2014
[8] Esmaeili, Morteza, Behnood Naderi, Hossein Kalantar Neyestanaki, and Alireza Khodaverdian. “Investigating the effect of geogrid on stabilization of high railway embankments”. Soils and Foundations 58, no. 2: 319-332. 2018
[9] Lee, D., Yoo, C. and Park, S., “Model tests for analysis of load carrying capacity of geogrid encased stone column,” In The Seventeenth International Offshore and Polar Engineering Conference, 2007.
[10] EBGEO, “Empfehlungen für Bewehrungen aus Geokunststoffen,” Deutsche Gesellschaft für Geotechnik e.V. (DGGT), 2008.
[11] Fahmy, G.S., Kempfert, H.G. and Gebreselassie, B., “Lateral spreading in basal reinforced embankments supported by pile-like elements,” In Proceedings of the 17th International Conference on Soil Mechanics and Geotechnical Engineering (Volumes 1. pp. 1574-1577, 2009.
Downloads
Published
License
Copyright (c) 2021 The International Journal of Engineering & Information Technology (IJEIT)
This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.
