LABORATORY AND FIELD TESTS USE OF BFRP ANCHOR BOLT IN SUPPORTING SOIL SLOPE

The mechanical properties of BFRP bar are studied by tensile test, shearing test, corrosion resistance test and bond strength test with cement-based materials. The result shows the following results. The tensile strength of BFRP is greater than 890MPa. The retention rate of acid and alkali resistance is greater than 92%.The shear strength is slightly smaller than that of ordinary steel bar. The bond strength of cement-based materials is greater than 4.5MPa. Referencing to the "Technical specification for grout anchors"(CECS 22:2005),the BFRP anchor bolts supporting soil slope are designed with BFRP mechanical performance parameters. While the BFRP bar is designed as anchor bolt, the design value of tensile strength of BFRP is 750MPa, and the bond strength of BFRP with mortar is 2.0MPa. Through in-situ comparing test of BFRP anchor bolts and steel anchor bolts supporting soil slope, the effect of BFRP anchor reinforcement on soil slope is analyzed. The results show that it is similar in bolt stress and slope deformation with BFRP bolt and steel bolt. The applicability of BFRP bar as geotechnical supporting anchor bolt is verified.