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Geotechnical News • June 2018
GEO-INTEREST
monitor deformations such as con-
vergence, deflection and curvature
‘intensely’ (many points) in semi real-
time bases. In a project for Crossrail,
while still at research stages, it was
providing live data (half an hour gap)
and alarm messages to monitor the
deformation of an escalator barrel at
Moorgate Station where conventional
monitoring could not be conveniently
installed. The message was coupled
with the image that caused the alarm
helping to validate it visually, some-
thing that cannot be done using con-
ventional systems.
The system is ready to be deployed in
future projects such as HS2, Crossrail
2 or in challenging environments such
as listed buildings. It does not provide
the solution to every monitoring prob-
lem but when it does, it is significantly
cheaper and can increase the redun-
dancy of monitoring and enhance the
health and safety aspect of managing a
monitoring system significantly.
Acknowledgement
CSattAR and my research work have
been the result of a unique industry
collaboration that was facilitated
by CSIC; Soldata, CH2MHill (now
Jacob), Crossrail, London Under-
ground, CERN, Mott MacDonald,
CoLOR (Costain, Laing O’Rourke
joint venture at BSSU), BBMV (Bal-
four Beatty, Morgan Sindall, VINCI
joint venture at Crossrail Liverpool
Street) have greatly contributed by
providing guidance, research sites
and support. The special thanks go
to CSIC, Arup and namely Michael
Devriendt for being the industrial
supervisor of the research and to
Kenichi Soga my PhD supervisor.
Mehdi Alhaddad
Senior Civil Engineer
Arup, 13 Fitzroy Street, London,
W1T 4BQ
+44 778 978 2445
Figure 5. Monitoring deflection of a stable wall.
Figure 6. Contactless monitoring of St Marry Abchurch Dome (left) &
Mansion House Ceiling (right).
