CLAY REINFORCEMENT USING GEOGRID EMBEDDED IN THIN LAYERS OF SAND

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ABDI M.R.; SADRNEZHAD S.A.; ARJMAND M.A.

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Paper Information

Journal: INTERNATIONAL JOURNAL OF CIVIL ENGINEERING Year:2009 | Volume:7 | Issue:4 Page(s): 224-235

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Information Journal Paper

Title

CLAY REINFORCEMENT USING GEOGRID EMBEDDED IN THIN LAYERS OF SAND

Author(s)

ABDI M.R. | SADRNEZHAD S.A. | ARJMAND M.A. | Issue Writer Certificate

Keywords

GEOGRID

REINFORCEMENT

CLAY

SAND

INTERACTION

DIRECT SHEAR TEST

Abstract

Large size DIRECT SHEAR TESTs (i.e.300 x 300mm) were conducted to investigate the INTERACTION between CLAY reinforced with GEOGRIDs embedded in thin layers of SAND. Test results for the CLAY, SAND, CLAY-sand, CLAY-GEOGRID, SANDGEOGRID and CLAY-sand-GEOGRID are discussed. Thin layers of SAND including 4, 6, 8, 10, 12 and 14mm were used to increase the INTERACTION between the CLAY and the GEOGRIDs. Effects of SAND layer thickness, normal pressure and transverse GEOGRID members were studied. All tests were conducted on saturated CLAY under unconsolidated-undrained (UU) conditions. Test results indicate that provision of thin layers of high strength SAND on both sides of the GEOGRID is very effective in improving the strength and deformation behaviour of reinforced CLAY under UU loading conditions. Using GEOGRIDs embedded in thin layers of SAND not only can improve performance of CLAY backfills but also it can provide drainage paths preventing pore water pressure generations. For the soil, GEOGRID and the normal pressures used, an optimum SAND layer thickness of 10mm was determined which proved to be independent of the magnitude of the normal pressure used. Effect of SAND layers combined with the GEOGRID REINFORCEMENT increased with increase in normal pressures. The improvement was more pronounced at higher normal pressures. Total shear resistance provided by the GEOGRIDs with transverse members removed was approximately 10% lower than shear resistance of GEOGRIDs with transverse members.

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APA: Copy

ABDI, M.R., SADRNEZHAD, S.A., & ARJMAND, M.A.. (2009). CLAY REINFORCEMENT USING GEOGRID EMBEDDED IN THIN LAYERS OF SAND. INTERNATIONAL JOURNAL OF CIVIL ENGINEERING, 7(4), 224-235. SID. https://sid.ir/paper/271819/en

Vancouver: Copy

ABDI M.R., SADRNEZHAD S.A., ARJMAND M.A.. CLAY REINFORCEMENT USING GEOGRID EMBEDDED IN THIN LAYERS OF SAND. INTERNATIONAL JOURNAL OF CIVIL ENGINEERING[Internet]. 2009;7(4):224-235. Available from: https://sid.ir/paper/271819/en

IEEE: Copy

M.R. ABDI, S.A. SADRNEZHAD, and M.A. ARJMAND, “CLAY REINFORCEMENT USING GEOGRID EMBEDDED IN THIN LAYERS OF SAND,” INTERNATIONAL JOURNAL OF CIVIL ENGINEERING, vol. 7, no. 4, pp. 224–235, 2009, [Online]. Available: https://sid.ir/paper/271819/en

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