As a kind of vertical anchoring technique

the anti-float anchor has been widely used in China

whose performance has begun to receive more attentions from researchers. However

steels may be eroded easily by groundwater or chemical solutions

which will cause the reductions of mechanical strength and service life

especially in subway engineering the steel anti-float anchor is forbidden. Glass fiber reinforced polymer (GFRP) anti-float anchor is a new kind of material which is composed of resin matrix and glass fiber. Compared with steel anchor

the GFRP anti-float anchor has higher strength

corrosion-resistance and light weight behavior. The field tests show the feasibility of GFRP anti-float anchor through embedded bare fiber optics sensor technique. According to the test results

the GFRP anti-float anchor stress-strain behaviors

load transfer mechanism and failure mechanism are considered. The test indicates that GFRP anti-float anchor is basically about shear failure and pullout capacity of anchors with ? 28 mm are 250 kN

which can be satisfied with engineering demands. The axial forces of anchors fall gradually with depth

and it will not bear load beyond certain length. Results show that the effect distance of axial forces is about 3.7 m when the length of bond part is in range of 3.95~6.95 m in moderately weathered granite，which indicates that GFRP anti-float anchors also exist critical anchorage depth. The shear stress on interface of anchor is not evenly distributed

which peak value is being driven down

and so as to the zero value. The research results can provide evidence for application of GFRP anti-float anchor.