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Royal Albert Hall - London

The Great Excavation is the grand name for plans for the Royal Albert Hall which will add an additional 1000m² of space. The project will result in the installation of a two-storey, double height basement on the south-west quadrant of the building. Tilt monitoring was required on the wall of the cellar adjoining the excavation site. Geosense MEMS tilt beams were installed in a ‘T shape’ configuration to ensure any movement of the wall was recorded.

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Whitechapel Station - London

As part of the first phase of monitoring, a series of Geosense borehole rod extensometers and inclinometers were installed prior to the diaphragm guide walls being installed. Future instrumentation to be installed includes In-place inclinometers, VW piezometers, VW strain gauges and a data logging system.

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Museum of Human Evolution - Spain

The specialist geotechnical company KellerTerra were contracted to construct the deep foundations which would be used to support the structure and for underground parking and the lower levels of the museum. Part of this deep foundation required the construction of a diaphragm wall to a depth of approximately 20 metres. Due to the depth of the excavation and the proximity of ancient buildings, extensive monitoring was necessary within the diaphragm walls by means of embedded vibrating wire strain gauges and inclinometer casing.

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Liverpool Street Station - London

Advanced station works have been carried out on the Moorgate shaft to provide ventilation and emergency access to the western end of the new Crossrail Liverpool Street station. As part of the first phase of monitoring, a series of Geosense vibrating wire piezometers, and inclinometer casing was installed prior to the diaphragm guide walls being installed.

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Doha New Airport Station - Qatar

A total of 288 Geosense in-place MEMS inclinometers (digital bus) were installed within inclinometer casing to accurately measure and obtain a complete displacement profile of the diaphragm wall. The use of a bussed system meant that significant savings on cable could be made. Part of the project includes building a concrete shell for a railway station terminal that in the future will connect the new $11 Bn (USD) International Airport to rail stations in central Doha. The underground box that will house the future station is 20 metres deep and 300 metres long.

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Canary Wharf Station - Crossrail - UK

As part of innovative design to enable construction of the station box, a cofferdam was created to hold back the water around the worksite. This was made up of approximately 300 interlocking Giken steel and concrete piles and various supporting equipment. The largest piles supporting the dam are 38m long. Instrumentation was an integral part of minimising the risks associated with such a deep and innovative construction project.

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