Abstract: GFRP anti-floating anchor is one of the effective ways to solve the corrosion problem of the rod body and it has a broad application prospect in the anti-floating engineering of underground structures. In this paper, the basic composition, working characteristics and design method of GFRP anti-floating anchor in recent years are analyzed. The research progress of inner and external anchorage of GFRP anti-floating anchor is introduced in detail. The anchoring mechanism characteristics of GFRP anti-floating anchor are summarized and analyzed. Under the action of tension load, the main failure modes of the inner anchorage are the bar pull-out and shear displacement. The bearing capacity is positively correlated with the diameter and length of anchorage segment, but there is a critical anchorage length. The distribution range of axial force and shear stress is between 0 and 3 m from the aperture. The failure modes of external anchorage section are three kinds of pullout, splitting and sliding. Anchor anchorage provides higher bearing capacity than straight anchor, and the bending radius and bending length of flexural anchorage have a direct bearing on the bearing capacity. The load-slip relationship curve of the external anchorage section presents a three stage change form. Finally, the research work about the bearing and deformation characteristics of GFRP anti-floating anchor in anti-floating system, the stability calculation based on groundwater level prediction and GFRP anti-floating anchor fabrication/design/construction integration technology are prospected.

Key words: GFRP anti-floating anchors, anti-floating engineering, design approach, load-bearing character test, counter-pulled test