Failure mode of displacement field for anchorage body during GFRP bolt drawing

Rock and soil bolt anchoring technology is a construction technology widely used in the field of geotechnical engineering, especially in the process of foundation pit support, the technology is used more. However, there are few studies on the failure modes of the anchorage body in the drawing process of GFRP soil nailing. Based on the model box test of soil nail drawing, this paper studies the displacement field of anchorage body in the process of soil nail drawing and analyzes the displacement field along the length of anchorage body and the vertical of anchorage body, respectively. The results show that before reaching the critical state, the deformation of the soil around the anchor decreases along the drawing point to the bottom of the anchor under the same load. However, when the anchor reaches the ultimate load, the pull-out failure curve of the anchor bolt does not change from an increasing trend to a stable horizontal trend, showing a curve form of low at both ends and high in the middle.