The Press-in Method Assisted with Augering: Case studies of Single U and Double Z Shaped Piles in the United Kingdom

抄録

One of the key issues of pile installations is ground condition. In the case where the ground condition is stiff or hard, much efforts are required to secure the pile drivability of piles, workability of construction plant, and stiff response of retaining walls. Since the Press-in Method was developed in 1975 in Japan, efforts had been made to develop the penetration technique assisted by augering. Finally, a pressing in machine against hard ground was manufactured in 1997. Since then, the machine has been improved until now and this penetration technique has been recently utilized in the UK as well. This paper introduces the penetration technique of the Press-in Method assisted with augering and the use of it in two case studies, A465 Heads of the Valleys Road Section 2 in Wales and the Thames Tideway tunnel in the central London. Finally, the installation of single U and double Z shaped sheet piles by Press-in assisted with augering are compared in terms of their pile drivability, workability and wall stiffness.