Study on Deformation of Micropile Tip Under Different Reinforcement Forms

The reinforcement form is varied, but there are still great differences about which form can play its anti-sliding better. Based on the research of mechanical properties of micro-piles, we build the mechanical model of pile head horizontal displacement, and then analyze pile top deformation of them with different reinforcement forms under identical external force. The deformation of tip of micropiles with surrounding reinforcement arrangement tends to be minimum and steel pipe pile to be maximum through theoretical calculation. Although the reinforcement ratio of micropiles with center reinforcement arrangement is equivalent to micropiles with surrounding reinforcement arrangement, the former’s pile tip deformation is greater than the later and anchor piles. At last, we verify the results of theoretical analysis through numerical simulation, and we find that they are basically the same. As for bending and anti-deformation, the micropile with surrounding reinforcement arrangement is far more effective than that of other forms of reinforcement micropile. It is an effective combination of anchor piles and steel pipe piles.