Laboratory Experiments on Performance Evaluation of Geocomposite Drainage Materials

Method of geocomposite drainage systems (GCDs) is relatively new and has been used as an alternative drainage system for geotechnical applications. The advantages of this system are cost- and time efficiency, environmentally sustainable, and at the same time, having comparable or higher drainage capability compared to current practices. However, the geocomposite materials, which is the main products of the GCD systems, need to meet certain criteria that are required for the sufficient drainage systems. These criteria are mainly related to their hydraulic and mechanical parameters that control the systems’ drainage capacity and durability during/after the construction. In this study, laboratory testing and evaluation of five different commercially available geocomposite products are conducted to improve the understanding of their physical, hydraulic and mechanical properties. Physical properties are defined by measuring their thicknesses and apparent opening sizes. Hydraulic parameters; permittivity (volumetric flow rate of water in normal direction) under various hydraulic head was measured using a constant-head equipment. Additional transmissivity and flow rate are defined under various hydraulic gradient and normal compressive stresses using in-plane flow rate testing apparatus. A number of strength testing; compressive strength, grab tensile strength, elongations, trapezoidal and puncture strength are conducted to evaluate the mechanical behavior of the geocomposite products.Results show that the parameters defined for each product are in the same order of magnitude in corresponding testing program, yet some differences are observed when compared with the manufacturer values. The reason of differences and recommendations on the selection of standard testing methods are discussed.Use of a factor of safety (FS) was suggested in the design of geocomposite drainage system when selecting the geocomposite materials.

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[1] A. Bobet, “Guidelines for Use and Types of Retaining Devices”, Purdue, IN, Prepared in Cooperation with the Indiana Department of Transportation and the U.S. Department of Transportation Federal Highway Administration, FHWA/IN/JTRP-2001/28, 2001.
[2] G. West, “Review of drainage behind retaining walls,” TRL Report 483, 2001.
[3] H. Moayedi, A. Asadi, and B.Huat, "Effect of Embedding Drainage System on Retaining Wall Structure Stability," Electronic Journal of Engineering Geotechnical Engineering., vol. 16, pp. 157-163, January 2011. [Online]. Available: https://citeseerx.ist.psu.edu/IEEE Xplore, http://www.ieee.org. [Accessed June 28, 2021].
[4] A. Boeckmann and J. E. Loehr, “Design of Maintainable Drains for Earth Retaining Structures,” Department of Civil and Environmental Engineering University of Missouri-Columbia MO, Part of DTRT13-G-UTC37, 2017.
[5] R. Liang, A. Ozdogan-Dolcek, and W. Likos, “Performance Comparison of Abutment and Retaining Wall Drainage Systems,” 2017.
[6] R.D. Holtz, B.R. Christopher, and R.R.Berg, “Geosynthetics Design and Constraction Guidelines,” DTFH61-93-C-00120, 1998.
[7] B.R. Christopher and G.R. Fischer, “Geotextile Filtration Principlas, Practices and Problems,” Geotextile and Geomembrane, vol.11,pp. 337-353, 1992.
[8] D.White, S. Sritharan, M. Suleiman, M. Mekkawy, and S. Chetlur, “Identıfıcatıon of the Best Practices for Design, Constructıon, And Repair of Bridge Approaches, Iowa State University, TR 481, 2005.
[9] U.S. Army Corp of Engineers, “Engineering Use of Geotextile,” Departments of The Army And The Air Force, ARMY TM 5-818-8, 1995.
[10] R.F. Wilson-Fahmy and R.M. Koerner, “Experimental Behaviour of Polymeric Geogrids in Pullout,” Journal of Geotechnical Engineering, vol. 120, pp. 661, 1995.
[11] A. Patel, Geotechnical Investigations and Improvement of Ground Conditions. Woodhead Publishing Series in Civil and Structural Engineering, 2019.
[12] US Army Corps of Engineers, Retaining and flood walls. New York: American Society of Civil Engineers Press, 1994.
[13] S. V Abhishek and V. Tarachand, “Case Study of Failure of Retaining Wall At Dwarakanagar , Visakhapatnam,” 2013, no. December, pp. 1–4.
[14] H. R. Cedergren, Seepage, Drainage, and Flow Nets, Third Edit. New York: John Wiley & Sons, 1989.
[15] B. Christopher and A. Zhao, “Design Manual for Roadway Geocomposite Underdrain Systems, Contech Construction Product Inc. Clough,” 2001.
[16] Online Available : https://geosynt.files.wordpress.com/2013/04/maccaferri.pdf) [Accessed June 25, 2021].
[17] ASTM- DESIGNATION: D5199 ‐ 12 “Determination of Nominal Thickness of Geosynthetics” Annual Book of ASTM Standards.
[18] ASTM- DESIGNATION: D4751 “Standard Test Method for Determining Apparent Opening Size of Geotextile. ” Annual Book of ASTM Standards.
[19] ASTM-DESIGNATION: D4491. “Standard Test Methods for Water Permeability of Geotextiles by Permittivity.” Annual Book of ASTM Standards.
[20] ASTM- DESIGNATION: D4716 “Standard Test Method for Determining In-Plane flow Rate of Geosynthetics” Annual Book of ASTM Standards.
[21] A. Bamforth, “Interpretation of In-Plane Flow Capacity of Geocomposite Drainage by Tests to ISO 12958 with Soft Foam and ASTM D4716 with Various Natural Backfill,” 2012.
[22] ASTM- DESIGNATION: D1621“ Standard Test Method for Compressive Properties of Rigid Cellular Plastics” Annual Book of ASTM Standards.
[23] ASTM-DESIGNATION: D4632. " Standard Test Method for Grab Breaking Load and Elongation of Geotextile" Annual Book of ASTM Standards.
[24] ASTM-DESIGNATION: D4533 “Standard Test Method for Trepozoidal Tearing Strength of Geotextile” Annual Book of ASTM Standards.
[25] ASTM-DESIGNATION: D4833/D4833M “Standard Test Method for Index Puncture Resistance of Geomembrane and Related Products” Annual Book of ASTM Standards.
[26] ASTM-DESIGNATION: D6241 “Standart Test Method for CBR Puncture Strength Test of Geotextile” Annual Book of ASTM Standards.
[27] S. Van Dyke, “Comparison of California bearing ratio and pin puncture strength testing used in the evaluation of geotextiles,” 2014.
[28] N. Yarahmadi, I. Gratchev, and D.-S. Jeng, “The Effect of Structural Configuration on Hydraulic Capacity of Geonet Drains Used in Landfills,” Electron. J. Geotech. Eng., vol. 22.15, no. 2, pp. 31-40., 2017.