Battersea Power Station
J.Coffey Construction has been involved in the redevelopment of the iconic Battersea Power Station project in South London for the past number of years. The works are based within the existing brickwork wash towers and our undertaking is to construct the new structure around the existing steel and brickwork structure. Therefore the works involve a significant amount of interaction between new and existing structure.
One such element of design is the construction of a new steelwork platform halfway up the tower to enable basement to level 4 construction to be carried out concurrently with level 5 to level 10 construction. This is illustrated in the below schematic.
As there were a lot of interactions with existing steelwork we saw fit to create a BIM model of the existing steelwork within the building. This was built using survey data gathered by the site survey team and inputting this into the BIM model to create an accurate model of the existing steel frame. The new frame was then designed around this this avoiding any clashes on site which would hamper program time and have cost implications. The below image shows the BIM model with the temporary steel (red) interacting with the existing steel (green).
Final Review / Construction Issue
Once this model was completed and has agreed amongst the team the final design was presented for approval to the client. This then proceeds to fabrication drawings whereby the steelwork is extracted from the model and detailed fabrication drawings are produced in order to manufacture the steelwork. The below image shows the fabrication model of the steelwork.
2 – 6 Cannon Street
This project involves the construction of a new basement with a steel and concrete superstructure. The works undertaken by J.Coffey Construction are to construct the basement RC structure and the lift and stair cores.
The project inherits a temporary works scheme to prop the external wall from the demolition contractor which the J.Coffey team have to strike in order to build the wall. The complication here is to develop a scheme which allows the propping to be struck but both retains the wall and allows the new wall to be constructed. The below scheme shows an outline of the approach.
This model was developed to ensure that the installed scheme would not clash with the existing scheme or with the future steelwork install. The below image of the BIM model shows the interaction of all of these elements. J.Coffey steelwork shown in red.
Once this scheme was finalised and approved by the client fabrication drawings were produced from this. An example of the prop fabrication drawing is shown below.