PERFORMANCE AND MECHANISM OF BOLTS FULLY GROUTED WITH SH-(C+F)SLURRY

Anchorage technology has been widely employed in the field of earthen sites' stability controlling. However, the lack of anchorage slurry is one of key problems in the development of anchorage technology and theory. Physical, mechanical and acoustic properties of the modified SH-(C+F) mortar specimens were tested. The specimens are composed of clay fly ash and SH whose concentrations are 0.5%, 1.0%, 1.5% respectively. In-situ anchoring, pull out tests and stress-strain monitoring of the interface between bolt and slurry of the anchoring systems are carried out. The systems are made up of mixed slurry and wood bolt, glass fiber reinforced plastic, and reinforced bar. The test results reveal the failure mode, anchorage performance, spatial and temporal distribution law of stress-strain on the blot-slurry interfaces of three types of anchorage systems. The test results show that SH-(C+F) mortar has better physical and mechanical properties, and better compatibility with earthen sites. The anchoring performance of the three kinds of anchorage systems with the full length grouting of SH anchorage system is excellent. Anchoring performance of wood bolt anchorage system achieves optimal when its concentration is 1%,while anchorage performance of glass fiber reinforced plastic and reinforced bar anchoring system behaves better with the increase of concentration of SH.The research findings provide a basis and a reference for the application of SH-based modified slurry in the field of earthen sites anchoring.