A redevelopment of the old Woolworths headquarters, 242 Marylebone Road is adopting a low carbon approach to refurbishment. For this £700K project, we provided specialist restricted access piling services. This included constructing 231 no. contiguous wall piles and 32 no. bearing piles in and around the existing structure being modified.
Projects
242 Marylebone Road
A low carbon redevelopment
Services
Sector
Client
Engineer
Heyne Tillet Steel
Contractors
ISG Ltd
Location
Marylebone, London
Duration
12 weeks
Challenges: Restricted Access
The contiguous wall piles were installed as either 450 mm segmental flight auger (SFA) when external to the structure or as 350/406 mm case and auger piles when installed internally. The bearing piles, up to 28.5 metres deep, were installed in restricted headroom using the case and auger method. We also constructed several crane base piles by the same method and returned to site at a later date to install a secant wall for a lift pit.
Logistical challenges also presented themselves as accessing the works area required the installation of a ramp to enable plant to be tracked to lower basement level, which was 6 metres below street level, on a congested Central London site.
Piles: In-House Design
The design of the piling was carried out in house. We also provided the pile attendances, including the removal of spoil via a conveyor system.
Sustainability: Low Emission Rigs
In line with the project’s sustainable strategy, we used low emission Klemm 702 and 709 piling rigs. These were mobilised over the course of several visits during a six-month period ending in early 2023.
Related projects
