摘要
为探索GFRP筋代替钢筋用作土钉抗拉材料的可行性,自制了试验模型箱,通过室内拉拔试验,探讨了拉拔过程中砂浆粘结GFRP土钉钉头位移的变化情况以及极限抗拔力随上覆压力的变化规律.试验结果表明,砂浆粘结GFRP土钉的拉拔特性类似于砂浆粘结钢筋土钉,且钉头位移和拉拔荷载之间的关系可用双曲线来描述.此外,在进行土钉抗拔承载力计算时,对密实填土宜考虑钉土界面处的剪胀效应.
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.
出处
《郑州大学学报（工学版）》
CAS
北大核心
2011年第2期71-74,共4页
Journal of Zhengzhou University（Engineering Science）
基金
广东省科技计划项目(2007B060401021)
东莞市科技计划项目(2008108101025)
关键词
土钉
室内试验
玻璃纤维增强塑料
抗拔承载力
剪胀
soil nailing
laboratory experiment
glass fiber reinforced polymer（GFRP）
pullout resistance
dilatancy
