A Silent and Vibration-free Permanent Sheet Piled Cofferdam Retaining Wall
This sheet piling project in Richmond, Surrey is for a private individual who was looking to build his dream property for his family. We were invited early on in the design development stage, as a specialist sheet piling contractor, to produce the most cost-effective steel intensive basement on the site. It was deemed steel was a better alternative to concrete for reasons of speed of construction and economics. Our element was to design, supply and install a sheet pile basement cofferdam of sufficient size to encapsulate a car lift pit, underground parking, gym, and swimming pool.
Due to the dense nature of the soils the ground was initially pre-augered with one of our Bauer RTG 16T leader rigs to full pile depth. The 400mm nominal diameter auger loosens the soil without removing it to enable pile installation. The piles were successfully driven with our Kowan WP-150 Stillworker supported with our Sennebogen 643 Telescopic crawler crane. Due to the relative compact nature of the plant we were able to shorten the site programme by undertaking two operations at once.