Marble Arch Place
We were employed by Almacantar to undertake the asbestos removal, soft strip, demolition, temporary works, and associated substructure works to Marble Arch Place - a landmark tower overlooking London’s Hyde Park.
The site included a site-wide single level basement, 2-storey podium, cinema, and a 23-storey tower block.
Technical Challenge
The project was divided into three phases. Phase one included the asbestos removal and soft strip to Marble Arch Tower, the Odeon cinema and the low-level surrounding buildings.
Phase two included the demolition of these buildings with phase three comprising the temporary works installation, basement wall and slab demolition, pile mat construction and underpinning the redundant subways on the boundary line.

Given the nature of the structure, we have deployed a range of methodologies to ensure the structures were carefully deconstructed within the footprint of the buildings. Methodologies included sequential controlled top-down demolition, mechanical methods and demolition utilising an ultra-high reach excavator – all of which were undertaken to pave way for a £400M mixed used development comprising of residential, office and retail premises.

The front of the cinema was a separate structure with the plant room located on the roof. Two concrete post tensioned beams held up the front of the building at first-floor level which created an overhang at street level.

Demolition was undertaken simultaneously to the main high reach demolition activities in a top-down fashion, with a complex sequence that required BROKK demolition for large parts of the structure. All the scaffold on the front of the cinema was designed and constructed to take the load of the BROKK machines working from the scaffold and the gantry.

Asbestos removal, soft strip, demolition, temporary works, and associated substructure works.
The site perimeter of the new development exceeded the existing one, and as such causing the existing basement line to be redundant. In order to create the new basement, the existing basement wall was demolished whilst ensuring the ground surrounding the site was retained. This was undertaken by a combination of sheet piling and utilising two existing subways that were on the sheet pile line. Furthermore, pile driving was undertaken using a silent method with some pre-augering required due to a still band of gravels at a depth of 4m.
Underpinning of the Party Wall

Two underpinning techniques were carefully considered, before jet grout underpinning was chosen ahead of traditional underpinning. Jet grouting, although extremely effective, is not always a popular choice for inner city projects due to a lack of space. However, with specialist contractor Keller employed to undertake the design and build of the underpins, the jet grout underpinning ran smoothly. In total, 71 jet grout columns were constructed under the buildings existing foundation, transferring the load down to the clay layer approximately 6-7m beneath.

Stakeholder Liaison

The busy urban area in which the works took place was at the forefront of our safe system of working. The site was located at the West End of Oxford Street, adjacent to the iconic Marble Arch and bound by Oxford Street, Edgware Road, and Bryanston Street. As a result, our Traffic Management Plans and Neighbourhood Liaison Strategy was pivotal in the continued successful delivery of this prestigious contract.

Award Winning Project

World Demolition Award 2017 – Marble Arch Place: Awarded to Erith for the intricate demolition project at London’s Marble Arch. This project, which also won Contract of the Year over US $1M, was voted as the overall best in field according to the international panel of judges.

Summary of service
Protection of existing substations/BT shafts and chambers
Asbestos removal
Soft strip
Top-down demolition
Ultra-high reach demolition
Basement wall and slab demolition
Temporary works
Pile mat installation