基于拉拔试验的加筋土界面摩擦特性OA北大核心CSTPCD

Reinforced soil is widely used in the reinforcement of roadbeds,slope retaining walls,and other areas due to its excellent engineering performance.The interfacial friction strength between reinforcement and soil has a significant impact on the overall integrity and stability of the retaining structures.To investigate the interface friction characteristics of different reinforced soils,pull-out tests are conducted using a self-made pull-out apparatus on four types of reinforced soils:clay-geogrid,clay-carbon fiber cloth,clay-geocell,and gravel soil-geocell.Among the tested reinforced soils,the interface friction between geocell and gravel soil demonstrates the highest strength,indicating superior resistance to deformation.Conversely,clay reinforced by carbon fiber fabric exhibits the lowest interface friction strength,however,it displays a faster interaction with the soil with allowable minimal deformations.There is a significant difference in allowable deformations of different types of reinforced soils,which should be fully considered in practical engineering applications.A theoretical model for calculating interfacial friction resistance between non-cohesive soil and geocell reinforcement zone is proposed.The research findings can provide reference for the selection of reinforcement materials in reinforced soil engineering.