Monitoring services for Bond Street Station Upgrade | United Kingdom

Movements, noise & vibration

Bond Street Station underwent upgrade works to improve the connection to the Crossrail Station being built just south of the London Underground Station. The works to the station involved the demolition of an existing bank, secant piling, construction of new cross passages and escalator chambers below ground and new structures to replace the demolished structure.

The predicted zone of influence is centred around London’s West End, Stratford Place, but also encompasses Grade 1 and 2 listed structures, London Underground infrastructure and services which lie underneath the road surface.

Sixense were appointed to undertake the structural and geotechnical instrumentation and monitoring of the surrounding structures.

Alongside this, Sixense carried out monitoring within the station and surrounding areas to ensure sensitive equipment and passengers were not exposed to excessive noise and vibration, whilst the works took place.

4D-Shape technology

Amongst an array of automated instruments, shape arrays (SAA), known as ‘4D-Shape‘ by Sixense, were used to monitor the Central Line, east and west bound, each string containing 51 sensors, totalling 25 metres in length. The Mid Level sewer was also monitored using 4D-Shape to determine longitudinal profile and convergence/divergence.

As an integral part of the structural monitoring solution provided by Sixense on this project, data is automatically acquired and processed by data logging solutions on-site, then stored on a remote server and managed 24/7 using Sixense’s Geoscope Software which allows real-time access to monitoring data.