The buildings were between two and five storey, constructed in the 1980’s and of a concrete frame. The roofs were pitched, timber framed and clad with tiles. They sat in close proximity to the River Thames, adjacent Kew Bridge.
After demonstrating best value at tender stage, DDS were appointed as Demolition Contractor to carry out the works of 5no. phases.
- Liaise with client and utility service providers to confirm the termination of services.
- Independently design and erect a monarflex enclosed scaffold for each building, incorporating pedestrian gantries and waste chutes.
- Remove any Hazardous Materials (i.e. Asbestos and COSHH Items).
- Soft strip the structures; remove all debris, furniture, fixtures and fittings to enable the better processing of the construction arisings.
- Demolition 5no. office blocks to the top of ground floor slab, retaining the flood defence wall until sheet pile wall installed (after which flood defence wall will be demolished).
- Maintain and protect Utility Assett (Electrical Substation and Mains Gas supplies).
- Remove bridge over highway.
- Carry out structural engineering reports on each structure throughout the works to validate the demolition methodology and demonstrate structural stability was being maintained.
- Break out ground floor slab and remove pile caps and foundations.
- Segregate and remove all rubbish, soft strip and demolition arisings to a licensed waste transfer facility.
- DDS worked with our sister company TW Services to engineer innovative waste management solutions, despite the distance from their depot. We utilised their fleet of vehicles with sleeper cabs to permanently oversee our waste logistics but still using local waste depots to the project. Not only did this make our waste management process more effective but also reduced the cost associated with waste recycling.
- Working adjacent a live construction site and the prestigious apartment development called for on-going collaboration with the tenants, residents and other contractors to ensure that no risk or detrimental impact was placed on them, or vice versa. Our traffic management system had to make provision for full time access and egress for all required parties throughout the project.
- Additional considerations had to be made as a result of the close proximity of the River Thames and the river boat houses mooring on it adjacent the site; dust and noise suppression were key, the works had the be sequenced to temporarily leave in flood/river retaining walls in-situ until replacement retaining structures (sheet piles) were installed.
- Works were carried out adjacent to the busy riverside pedestrian footpath (Riverside Thames Path) which passed through the site and remained live throughout the works. At locations where the footpath ran through out site, a protective pedestrian gantry was designed and installed.
- The high end residential apartment block (Regatta Point) was adjacent the site. DDS carried out regular noise monitoring to ensure levels were adhering to those agreed with the client at pre-contract stage.
- The existing office blocks in the complex were progressively vacated; the programme had to be sequenced and phased around this with out any disruption to stakeholders.
- For the first phase of the works the site constraints were extremely tight and subsequently the parts of first structure had to be demolished using a top down method to make room for our 360° excavators to progress mechanical demolition.
- As opposed to a contract lift, DDS designed and implemented a Construction Plant Assisted (CPA) lift of a pedestrian link bridge between an office block that was due to be demolished and one that remained in use.