Erith Group, parent company of Swanton Consulting Ltd, has carried out the controlled demolition, using explosive techniques, of three heat recovery steam generators, their chimneys and drum houses at Killingholme A Power station.
The heat recovery steam generators and their iconic 70-metre tall white chimneys have overlooked the Humber estuary towards the City of Hull since 1994. They were constructed from a steel framed superstructure base, supporting top hung boilers, chimneys and a substantial drum house.
Swanton provided engineering support to Erith Contractors to enable its controlled blow down. We created a complex 3D model to assess the sequential effect of pre-weakening works on the 5000-tonne steel superstructure. Our model incorporated almost 4000 individual elements which allowed us to accurately predict the lateral deflection the structure would undergo, and helped develop a sensitive movement monitoring system which was a first of its kind to be used when preparing structures for demolition by explosives that we are aware of.
We also created a collapse model which helped the client visualise the direction of fall, as well as the intended sequencing of explosive kicks at the base of the structure.