Key Projects | Holland Green

Project Scope

Keltbray Group were appointed by Chelsfield Developments for the demolition, enabling works, piling and bulk excavation for a new extensive basement on the site of the former Commonwealth Institute in Kensington.
A 465lm hard/firm secant piled wall, designed by the Clients Engineer, Arup was required to be installed for a new double storey basement. The project has been made all the more complex owing to the existing grade 1 listed structure of the commonwealth institute and it’s requirement to be retained and incorporated into the new structure.
Utilising low headroom piling techniques in pre-defined locations around the existing structure, the secant wall was installed under the extended canopy of the existing signature Parabolic roof. The remaining locations of the wall were installed with large 90Ton piling rigs with the tight programme calling for a peak of 5 piling rigs working on site at any one time.
The Clients specification called for pile verticality tolerances of 1:200 determining the need for traditional, rotary bored techniques
Pile installation took place in a defined sequence, adjacent to controlled demolition activities with the Keltbray Group works package offering the Client significant programme saving as opposed to more traditional procurement methods.
Keltbray delivered a high quality product under the supervision of the Arup resident Engineer with the works also completed on programme.
Keltbray Piling were also responsible for the installation of the small diameter mini piles in order to support the Parabolic roof in the temporary condition. These piles were designed in accordance with Eurocodes and installed in restricted headroom conditions to stringent settlement criteria.
  • Facts
  • Client : Chelsfield Developments
  • Location : London
  • Value : £2.3m
  • Scope : 653No, 900mm dia Rotary Bored hard/firm secant piled wall with pile lengths up to 24m.