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Mehdi Alhaddad

Mehdi Alhaddad

Highly Commended Winner 2015
Photogrammetric Monitoring of Construction Environments and Surrounding Assets

Research Abstract

As part of his research to optimise tunnel monitoring, over the last few years Mehdi has developed a new photogrammetric system that has been designed to monitor tunnel deformation with a great precision but yet with a fraction of conventional costs. This system has been installed in a number of tunnels to monitor the integrity of structure while other construction activities were taking place nearby. This includes monitoring operational London Underground tunnels, and other underground spaces that were affected by the excavation of Crossrail project.


The benefits of using this system are:

  • Low cost – saving up to 90% costs as compared to alternative systems
  • Accuracy and precision – at resolutions of greater than 0.1 mm 
  • Redundancy – monitoring more points at no additional costs
  • Real-time visual inspection – the software can be used to inspect structures and monitored points in real time in advance of human deployment
  • Structural disruption – No need to install targets and often natural features on structure can be tracked as a target
  • Installation – the system is small in size and easy to install, in some cases it is possible to install the system in one day
  • Historic monitoring – Images can be archived within BIM and re-examined for additional points when needed.

Winner's Bios

Mr Mehdi Alhaddad

University of Cambridge, UK

Mehdi Alhaddad is currently a PhD researcher at Cambridge Centre for Smart Infrastructure and Construction, University of Cambridge. His areas of research include implementing ground-breaking technologies in the monitoring of infrastructure works (during construction and life time). He is the founder of CSattAR, which specialises in structural health monitoring of tunnels using photogrammetric techniques. Prior to commencing his PhD, Mehdi graduated from University College London (UCL) with first class honours, where he was selected in Dean’s List at Columbia University as part of his international degree programme. He has also worked for ARUP as a geotechnical engineer.


Judge's comments

“The judging panel was impressed with the application of photogrammetric technology to the monitoring tunnel deformation and structure integrity. The strength of this innovation lies in its relative simplicity, accuracy and un-intrusive nature. This new photogrammetric system shows strong potential in the broader context of monitoring infrastructure works.”