Abstract: Small diameter ordinary grouting sleeves are difficult to apply to underground structures,such as large volume and large-span prefabricated stations or tunnels.Therefore,a large-diameter UHPC full-grouting mechanical interlocking sleeve is designed.To evaluate the tensile performance of the sleeve,a comprehensive uniaxial tensile test was conducted,considering various factors including the anchorage length of the steel bar,the wall thickness of the sleeve,the diameter of the bolt,and the thread length of the inner wall of the sleeve.The failure mode of the grouting sleeve was analyzed,the influencing factors of the bonding performance of the sleeve were discussed,the load-strain response patterns on the surface of the sleeves were explored,and the working performance of the sleeve was evaluated.The research findings reveal that under uniaxial tensile testing,two failure modes occurred:reinforcement fracture and reinforcement slippage.When the anchorage length is shorter than 6d,reinforcement slippage failure occurs.Reasonable increases in the wall thickness of the pipe sleeve can improve the constraint effect of the pipe sleeve on the grouting material.The recommended value for the critical anchorage of the steel bar of the sleeve is 6.2d,which is 22.5% lower than the 8d required by the specification.The strain on the reinforcement is minimal near the clamp end,peaks at the orifice,and is greatest in the middle of the sleeve surface,decreasing towards the orifice.The working performance of the sleeve is evaluated using yield ratio,strength ratio,ductility ratio,and capacity ratio.The data results show that the working performance of the sleeve is satisfactory.Based on the mechanical model of thick-walled cylinder theory,the stress and strain law of the sleeve surface is analyzed,and the applicability of the mechanical model is verified.The research results provide a theoretical reference for enriching joint types and promoting the application of grouting sleeve joints in large-span assembled structures.