Tests for deer-proof fence components : pole bending strength, anchor pile pull-out resistance and lifting load of lower-end rope

Abstract

Strength tests for components of deer-proof fences were conducted for pole bending, anchor pile pulling-out, and lower-end rope lifting. Although all of 7 pole products were marketed as anti-animal fence poles, the mean pole-bending strength for each product ranged from 66 N to 396 N. Two types of longer anchor piles exhibited the greatest resistances for all horizontal, diagonal, and vertical directions of pull-out tests, and anchor piles showed higher pull-out resistance in the developed clay soil than in the forest soil. The resistances of anchor pile pulling-out for diagonal direction were larger than those for vertical direction, thus we proposed improving deer-proof fences by connecting the lower-end rope and anchor pile tops so that the anchor piles receive a diagonal pulling force, increasing their resistance over receiving a vertical pulling force.