Pullout capacity of strip plate anchor in cohesive sloping ground under undrained condition

Abstract

The pullout capacity of strip anchor plates embedded in clayey sloping ground under undrained condition has been studied by using lower bound limit analysis with finite elements. The analysis has been performed for different values of (i) slope angle (β) varying from 0° to 40° with an interval of 5°, (ii) embedment ratio (H/B) of the anchor plate varying from 3 to 7 where H is the embedment depth and B is the width of anchor plate and (iii) c/γH ranging from 0.25 to 8 in addition to the case with γ=0. Three different orientations (θ) of the anchor plate, say horizontal (i.e. θ=0°), parallel to the ground surface (i.e. θ=β) and vertical (i.e. θ=90°), have been considered in the present study. For γ=0, the pullout capacity of both vertical and horizontal plate decreases with an increase in slope angle whereas the pullout capacity of anchor plate lying parallel to the sloping ground remains unchanged for all values of β. It has been observed that the pullout capacity of the anchor plate decreases with an increase in slope angle of the ground surface for γ≠0. The results are compared well with available results on pullout capacity of strip anchor plates with θ=0° and θ=90°.