This project required the removal of all asbestos contained materials, the soft strip of all timbers and other non-masonry materials, deconstruction using mini-demolition rigs to a reduced level, demolition using high reach machinery, followed by the processing and safe removal of all remaining resultant materials and the back filling of the foundations.
Client: Glasgow Housing Association
Contract: Tower block demolition, asbestos removal and site clearance
Start/end date: 2016 – 2018
Total Project Value: £3,500,00.00
Planning and Feasibility Studies
Following numerous site feasibility studies by the management team of TDS, a combination of deconstruction to a reduced level by ’top down’ demolition was undertaken, down to the eleventh floor. Followed by high reach machine demolition for the remaining structure, this preferred method was chosen based on the information contained in the pre‐construction information pack, the existing structural design of the buildings and most importantly the close proximity of existing occupied residentials.
Complexity of Demolition
The two blocks were fairly typical of the 1960’s period, with reinforced concrete frames and floor construction, precast concrete and external wall panelling.
The ground floor comprised the entrance area and various services rooms, above that were 22 floor levels containing 6 domestic flats on each floor, served by a central corridor, two lift shafts, a concrete main staircase and an emergency escape steel staircase.
At roof level there was a lift motor and plant room, which originally had a concrete flat roof, this was overlaid with a steel frame and clad pitched roof with external metal cladding added to the external elevations of the plant room.
To enable the safe demolition of the tower blocks, consideration had to be taken in regards to the low-rise blocks that were in very close proximity to residents, safety precautions were put in place, with Site Supervisors doing regular checks around the site for any potential dangers while the deconstruction of the blocks to the eleventh floor level were safely carried out.
Protection was provided by the pioneering use of a mast climber working platform system as devised by TDS engineers.
Deconstruction of the roof level and floor level below, was carried out using mini demolition rigs and jacks, with the redundant lift shafts being used as a means of transferring demolition hardcore from the working level to ground level extraction point.
Once the structure was reduced to the aforementioned eleventh floor level, the residual structure was demolished using high reach demolition rigs, safely and without any damage or risk to the residents or neighbouring low-rise housing blocks.
A mutual team spirit between TDS and the client aided this delicate demolition, with all parties working towards achieving the objectives and goals in place, of having zero accidents and zero incidents.
Residents Liaison Oﬃcer (RLO) was quickly able to establish a healthy working relationship with the surrounding residents, thus mitigating any potential adverse with residents who had concerns, we kept residents updated with the project progression, with regular newsletters. The RLO would not only advise and update residents, she would communicate personally with them with regards to any queries or concerns they may have had.