The Stockwell Park High School project was a three-phase demolition of live school to make way for a new 12,000m², high school to replace the existing 1950s buildings.
Client: Willmott Dixon
Structural Engineer: Toureen Group Ltd
Project Value: £6.8 Million
Date of Completion: December 2010
With a project programme of 32 months, the project had a wide scope on a complicated and live site, which included the need for strict noise and vibration restrictions, and highly restricted delivery and access conditions.
In order to be as sustainable and efficient as possible, Tilley and Barrett used on-site recycling and sorting for materials, all the concrete was crushed on site and then used in the formation of the new roads, hard standing areas and MUGA. The project was also, at the time, one of the biggest asbestos removals operations in the South East of the UK with all floors containing a total span asbestos licensed enclosures which posed its own challenges.
To prevent debris falling onto adjacent buildings, Tilley and Barrett designed and manufactured a custom and innovative 28x6m rubber demolition curtain, the first of its kind to be used in the UK.
The curtain was suspended by a 100 tonne mobile crane. The operation of this demolition curtain was hugely successful with compliments received from client senior management.
As this was a live school, it was imperative to keep noise, dust and vibration to a minimum. To do this,
Tilley and Barrett used pioneering methods to control the dust produced during the demolition and crushing processes. Utilising our in-house dust suppression unit connecting multiple fire hoses at controllable pressure along with a dust boss DB90 and small-bore hoses fitted to the machine arms, we were able to suppress dust at the source.
The third phase of the project included the demolition of an eight-floor tower block, with a floor area of 960m². To do this, Tilley and Barrett used a 130T Super High Reach demolition specification machine fitted with a 42m boom and a 5T crusher. A 65T long reach excavator with a 29m long arm was also brought in with seven smaller excavators, two crushers and a loading shovel.
Tilley and Barrett recycled all concrete from the structure on site. All material was screened and certified to DOT Type 1, 6F2, 6F5 and 20/40 stone standards and used on site under hard standing areas, MUGAs and new structures.
Over four hundred and eighty sealed 40-yard skips were removed filled with asbestos.
Two 40ft, high top, containers filled with 1800 chars, 2000 tables, 120 marker boards and 5000 books diverted from landfill were donated to charity in Malawi.