Crossrail is among the most significant infrastructure projects ever undertaken in the UK. The aim of Crossrail is to improve customers’ journey time across London, to ease congestion and offer better connections. The project was started in May 2009 and the first Crossrail services through central London will start in late 2018 – an estimated 200 million annual passengers will use Crossrail.
An important element of the Crossrail project is Paddington Station. Leica Geosystems was heavily involved in its construction, and one of the key challenges is that Paddington is surrounded not only by modern buildings but by historic ones as well. It is also located in the densely built-up zone of central London with its maze of pipes, cables and sewers, making it an extremely complicated construction project.
Leica Geosystems products and solutions played an important role in securing the success of the new railway line by monitoring structures and the degree of earth settlement. A 24-hour monitoring system, using up to 52 Leica Geosystems robotic total stations and precise levelling, measured changes in ground movement caused by deep excavation works alongside a historic London site.
The total stations were attached to various key positions on the outside of buildings. Highly accurate 3D data was collected from the total stations that measured key reference points of the various prisms placed strategically throughout the area’s buildings. The data was then sent to be processed with Leica GeoMos.
The use of Leica Geosystems monitoring sensors, software and communications is vital to the Crossrail project, as these accurate measurements provide information on any variations in structures caused by earth movements. This minimises risk, not only to the buildings themselves, but also to public safety.