Field drawing test of fully bonded BFRP anchor under cyclic loading

Due to the improvement of engineering material performance requirements, traditional steel anchor rods have limitations, while BFRP anchor rods have highlighted their advantages. This article focuses on the application of fully bonded BFRP anchor rods in geotechnical anchoring engineering and the construction of BFRP anchor rods. Based on the relevant roadbed slope protection anchoring projects of China Railway Eighth Bureau Group, and referring to previous experimental ideas, five sets of BFRP anchor rods with different lengths were tested for their pull-out resistance. The experimental results show that: (1) The sliding displacement of the anchor rod increases with the cyclic load, and the maximum sliding is not synchronized with the maximum load and has hysteresis and rebound. After unloading, the anchor rods with lengths of 4.8, 4.3, and 3.8 meters still have adhesive force; (2) The monitoring curve of the dynamometer is generally consistent with the design curve; (3) The key to the success of the experiment lies in the preparation of auxiliary fixtures at the loading end, the installation of strain gauges, and the waterproof treatment of wiring. This research provides a theoretical basis and reference for the optimization design and construction of BFRP anchor rods in geotechnical anchoring engineering.