Construction in the heart of Knightsbridge relies on ITM Monitoring

The K1 development in the heart of Knightsbridge relies on automated and manual monitoring systems provided by ITM Monitoring as the construction moves forward.  The 28,000m2 scheme transforms the end of Sloane Street in the Knightsbridge Estate owned by Saudi Arabia’s Olayan Group with plans including seven flagship retail units, luxury residential space and offices, fronting on to the Harvey Nichols department store, One Hyde Park and the five-star Mandarin Oriental Hyde Park hotel.  Working with the structural engineers Waterman Structures Ltd, ITM Monitoring is reviewing the effect of construction on the London Underground assets as work progresses.

Currently the site is occupied by a mix of dated offices and a small number of retail and residential units, which will be demolished for the new scheme.  The listed building on the southeast corner will remain and the Edwardian facades on the main streets will front a new superstructure.  The project involves the creation of new Underground entrances and tunnel-cooling shafts, with passenger access and flow being improved by moving the original narrow entrance to the Knightsbridge Underground Station platforms from the busy junction at Sloane Street and Brompton Road to further down Brompton Road.

The Luxury Development Plan

Olayan Group’s asset managers, Chelsfield Partners LLP, submitted planning applications for the site in early 2016.  The development, designed by Fletcher Priests Architects, is set to restore this part of London as the centre for world-class luxury shopping.  There are extensive changes planned for Knightsbridge Station, where public realm improvements include wider pavements along Brompton Road, with a relocated improved step-free entrance to both the Hammersmith and Piccadilly lines.

ITM’s role in the project is critical for a number of reasons.  The extensive development involves the demolition of the majority of the buildings on the site, which is bounded by Brompton Road, Basil Street, Hooper’s Court and Sloane Street which house many retail outlets, residential units and office spaces.  Construction of this new superstructure with its three-storey basement also requires the monitoring of any effects of the deep excavation on nearby infrastructure especially the Knightsbridge tube station.  The data provided by the monitoring will be vital in safeguarding the LUL tunnels and assets, local buildings and the people living, working and shopping in the area.

Monitoring the London Underground Assets

ITM have been commissioned to monitor the London Underground Piccadilly Line platform and running tunnels, escalator trusses and any other LU assets in the Knightsbridge tube station that may be affected by the construction.  Once given the go ahead, installation of ITM’s monitoring systems progressed quickly and was completed by April 2017.

Within the platforms and running tunnels of the Piccadilly line, ITM installed seven Robotic Total Stations to monitor 3-D global movement of the tunnel and track geometry.  Once data is collected and verified by ITM’s StarAdjust software, it is uploaded to ITM Monitoring’s trademarked data visualisation software, Calyx OMSTM.

Furthermore, two of the six escalator trusses are being continually monitored for vertical movement by longitudinal title-beam strings installed the full-length of the escalator shaft.  Lateral beams measure the axial rotation of the trusses.  This automated data is collected on an hourly basis and transferred to the Calyx OMSTM website for review back at head office by our in-house engineers and client team.

ITM will be maintaining the equipment and data provision on a monthly basis until the construction is completed in 2020.