I&M of bridge footings and buildings – Kingdom of Saudi Arabia

Project summary

Service provided:  Instrumentation & Monitoring of Bridge Foundations and Surrounding Structures
Location:  Jeddah, Kingdom of Saudi Arabia
See google map
Client:  Jeddah Municipality Advanced Construction
Period of the service:  2019-2021
Duration of service:  2 years

Images of the project

The development of a new transportation axis


In order to reduce the severe traffic congestion, Jeddah Municipality is undertaking an important road underpass project at the intersection of Prince Mohammed Bin Abdel Aziz Street (Tahlia) with Madina Road.


The issues at stake and the Sixense solutions


The main technical concern of the project is the stability of the Madina road bridge adjacent to the tunneling works as the excavaton is carried out in the vicinity of some of the fly-overs supporting pillars. An assessment of the settlements caused by the dewatering works was also deemed necessary.


Sixense was contracted to install and operate a real-time automated monitoring system dedicated to providing continuous measurement of pillar deformation and settlement during the works.


Sixense proposed to the project stakeholders to use the CYCLOPS technology, proven worldwide as the most effective solution for surface real-time monitoring.
The system consists of 1 Automated Total Station measuring ~ 80 Prisms installed on the bridge pillars and on surrounding buildings in the dewatering works zone of influence, whilst 4 Datalogged Borehole Piezometer Sensors recorded the ground water level, to allow for further movement correlation and analysis.


Vibration Monitoring was also carried out on the project, where the excavation works are directly adjacent to residential buildings.

Project Key figures

1 Automated Total Station
80 Optical prisms
4 Datalogged piezometer sensors
1 Vibration monitoring unit

Similar projects