LOCATION:
Construction of a 50MW short term operating reserve (STOR) gas plant on land next to Brigg power station for energy supplier, Centrica.
The project involved working in proximity to the operational Centrica power plant and in some cases interacting with the power plant side. Our first task was to fill the site to 1.8m to provide a suitable piling platform in order to install 40 CFA 600mm diameter piles.
- Construction of 8 metre high concrete blast walls for a 132kv transformer.
- Concrete pours of over 400m3.
- 40m x 60m radiator foundations.
- New roads and drainage.
- Over 1,000m of cable conduit and 300m of stainless steel oily water pipe.
- Cable pulling pit and oily water collection pit.
- Lube oil tank slab.
- Fire water tank foundation, container foundation and pipe installation.
- Black start unit foundation.
- Over 100 pipe support foundations.
- 600 tons of decorative gravel.
- Kerb and asphalt works.
Challenge
The concrete foundations for the main powerhouse structure had a complicated steel reinforcement design with five engine foundations acting independently to the main foundation.
The main slab had over 400m3 of concrete, which was poured in a single day using two 52m concrete pumps and completed with a power float finish.
Working on a small site in close confines with numerous other contractors – over 100 operatives.
Solution
We installed over 1,000m of cable conduit and 300m of stainless steel oily water pipe in specific locations excavating in-between piles. We then reduced the level of the piling platform until we reached formation level in section so we were able to crop piles and install a blinding layer.
We constructed a 40m x 16m bunded radiator foundation in an area that required additional works to remove all the previous power plant structures (i.e. oily water collection pit, asphalt turning areas, cable culverts).
A transformer foundation was constructed requiring 8m high blast walls to three sides and concrete plinths to position the transformer on arrival. Two smaller transformer foundations were constructed that required 4m high blast walls in another area of the site.
Outcome
We completed the main power house building on schedule, allowing the steel erection contractor to progress their works.
