The client requirement was to construct a new school building within a Tree Root Protection Area. Our resulting design was bespoke to the development and completed in-house.
17 of the total 117 piles were to be with-in the Tree Root Protection Area. We used air spades and hand augering to investigate the tree root locations, with the arboriculturist in attendance. No large roots were subsequently found.
The Jean Lutz system was used to monitor the pressure of the ground whist drilling and to control the pressure of the concrete whilst piling.
During the construction of the slab, we laid plywood decking in the protection areas for us to work on, to avoid causing any root damage.
The project was a success, despite some additional added time required for some re-designs, the slab was completed within the contact duration.
Treesafe was the ideal solution for this site because it minimised the amount of excavation needed, which was essential due to the close presence of the protected tree. By using a mini rig and hand augering before piling, we could ensure that no tree roots were damaged by the new foundations. Despite poor weather at the time of our works, we were able to continue working without delay.