Investigation of Pile Behaviour using Rotary-Jacking Method

Abstract

This research investigates the installation of a new pile using the rotary and jacking method. The use of hydraulic ram to apply static jacking force does not produce the noise and ground vibration produced by the traditional percussion and vibro-hammer methods. The pile jacking process can increase the bearing capacity and stiff base response but may occasionally cause excessive installation resistance. An innovative rotary jacking method can overcome these problems and enhance pile performance. The research seeks to determine the effect of pile loading and the pile response under axial loading. The laboratory experiment uses a 25-mm circular pile and a screw pile together with a large container filled with silica sand attached to a rotary jacking machine. The installed piles are subjected to the installation and static load tests. The results show that the rotary jacking method successfully installed the pile with less resistance between the sand and pile surface, which allows the piles to penetrate the required depth with less loading. The experimental results proved that the rotary jacking method reduced soil settlement and the time taken to drive the pile into the soil. This new innovative method will enhance pile installation in the construction industry.