Abstract:

Many pullout tests with slantdentistrip geosynthetics were implemented under low surcharge in order to find the influence of various factors such as slant angles, height, and horizontal space of vertical reinforcing element on the ultimate pullout resistances. Based on the pullout tests, the component elements of ultimate pullout resistances were predicted. These include friction forces between the upper and lower surfaces of horizontal reinforcement and soil, vertical reinforcement point friction force (horizontal component of point resistance), vertical reinforcement shaft resistance (horizontal component of the deviation pressure of foreside pressure from backside pressure), and friction forces between both sides of horizontal and vertical reinforcement and soil. The interaction mechanism between sand and slant dentistrip inclusions is analyzed using the limit equilibrium theory and a new theoretical model is proposed to determine the pullout resistance.

Key words:  slant-denti-strip reinforcements; pullout test; interface behavior; pullout resistance model