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《Journal of Zhengzhou University(Engineering Science)》 2011-02
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Laboratory Experimental Study on Pullout Resistance of Mortar Grouted GFRP Soil Nails

MA Chong-wu1,LIU Zhong-yu2,ZHOU Gao-yong2(1.Department of Civil Engineering,Dongguan University of Technology,Dongguan 523808,China;2.School of Civil Engineering,Zhengzhou University,Zhengzhou 450001,China)  
In order to verify the applicability of GFRP bar in soil nailing design,a large-scale laboratory apparatus have been built and used in the pullout experiments of mortar grouted glass fiber reinforced polymer(GFRP) soil nails.The displacements of nail head under different pullout loads are measured,and the ultimate pullout loads under different overburden pressures are obtained.The experimental results show that the pullout behavior of mortar grouted GFRP soil nails is similar to that of mortar grouted steel soil nails,and the relation between the displacement of nail head and the pullout load can be described with the hyperbolic function.In addition,there exists the dilatancy effect of the soil near the nail in dense fills during pull out,which should be taken into account in estimating the pullout resistance of soil nails.
【Fund】: 广东省科技计划项目(2007B060401021);; 东莞市科技计划项目(2008108101025)
【CateGory Index】: TU578.1
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