The Pinnacle, also known as The Bishopsgate Tower, is a 288m, 63-storey skyscraper under construction in the City of London.
When completed (pencilled in for 2013), the building will reach 288m, making it the tallest in the Square Mile and second only to the Shard in stature.
Standing on the deepest piles in the whole of London that are 65.5 metres deep, the building will be clad in ventilated glazing that works like a snakeskin with every single piece of identical size reducing build cost.
The inside of the spiral at the top of the building will contain PV panelling to generate power from the sun.
Demolition of the site began in mid-2007 and was completed the following year.
Geosense instrumentation was used in the monitoring of existing basement walls during demolition of the internal basement slabs (3 levels). The existing basement walls were to be retained for the new structure, however not enough information was available on their present condition, therefore extensive monitoring of the walls was proposed.
- Bishopsgate Tower
- Date: 2009
- Arab Investments
- Instrumentation Specialist
- Site Engineering Surveys Ltd
- Arup Geotechnics
Due to the nature of the demolition, conventional monitoring methods was not possible, therefore a tiltmeter system was proposed and implemented.
To adequately protect the system during demolition, the tiltmeters were installed into the walls through cored holes. Wiring was protected through conduit and steel covers.
The existing basement wall running parallel with Bishopsgate was retained and integrated into the final construction and whilst heavily supported required monitoring to detect any deflections.