Experimental analysis on waterproof performance of new type of GFRP split bolt
QIU Dejin
ZHOU Zhi
BAI Shi
XI Xiaoqing
HUANG Jin
DENG Xinmao
Abstract：The present situation of the application of the split bolt have been reviewed in this paper. And the GFRP materi-al is used as the screw of the split bolt. The interfacial permeability of 48 test piece of conventional and new type of split bolt was tested. The influence of different split bolt on the permeability of the interface with concrete was analyzed and compared. And the characteristics and the interface Mechanical parameters such as equivalent water gap width and permeability coefficient were discussed. The results show that the adhesive interface between the bolts and the concrete is the main channel of water seepage and the water stop strip can improve the impervious performance of adhesive interface. The new type of GFRP waterproof split bolt has good sealing performance. Based on water seepage test and penetration time test,the formulas for calculating perme-ability coefficient and width of hydraulic fracture of the interface are proposed according to seepage pressure and penetration time. The transfusion of adhesive interface basicly meet the laminar flow. There is a big difference in the permeability coefficient and the equivalent width of hydraulic of bond interface between the different split bolt and the concrete.
Keywords：split boltGFRPbond interfaceimpermeabilitypermeability coefficient
Publication Date：2018-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：5( 67-71 )