Holdfast Training Services Trial Blog

Introduction:

This seems like a relatively unique engineering feat so thought worth a quick blog to share how I think it works and highlight an issue which will soon need addressing.

The original Shell House structure is being renovated. The clock tower and three sides of the facade stay, everything else goes. Also, an additional 4 storeys are excavated prior to building back up.

Image 1. Original Shell house structure

Retention works prior to demolition:

• Plunge columns
• Crane base
• Stability core
• Perimeter transfer structure
• Clocktower transfer and support elements

Retention works during Demolition:

• Façade support braces inserted as demolition progresses

Image 2. Facade retention system as at 24 Aug 18

How I think it works:

Image 3. How I think it works

Retention works during excavation (soon to commence):

Image 4. Excavation procedure

Issue:

Plunge columns are up to 40mm out of plumb – what are the risks, how can they be mitigated?

I hope to answer these questions in my next TMR so any comments very welcome