200 km of new subway lines – moving rapidly towards automation
Initiated in 2016 and scheduled to be completed by 2030, a major development project to extend and modernize a new Paris subway system is now well underway. The Grand Paris Express will feature departures every 2–3 minutes via 68 brand new stations, and new driverless trains.
This huge and immensely complex project is bound to affect existing traffic systems as well as residential and commercial areas all around the city. It is currently the largest construction project in Europe.
Monitoring noise, vibrations and soil deformation
For obvious reasons the project is divided into a number of sub-projects, and two private companies, EIFFAGE and Razel-Bec, are responsible for building a section of the metro line 15 (Lot “T2B” consisting in 3 stations and 7,2 km tunnel).
Ms Salima Zribi works with service auscultation at EIFFAGES.A., Europe’s fifth largest construction company:
Our company has assigned a team of 12 people to continuously monitor the impact of all our work including soil deformation, noise and vibration generated at the various work sites. This includes safety management on the construction sites themselves and the prevention or limitation of damages on surrounding buildings and other structures. To monitor the noise, we cooperate closely with the Environment Department.
Centralized report generation and sensor monitoring
To monitor noise EIFFAGE uses 24 Sigicom INFRA Mini and 24 INFRA S50 monitors on solar panels. To monitor vibrations, the team uses 38 INFRA C22 units all along the future tunnel route. The sensors are widely spread on several locations and a central Infra Net system is used to monitor and manage the sensors and generate data, and reports.
To optimize all this information for the various user groups – Auscultation team, Environment Department, Safety manager, Grand Paris Company managers – there are a number of different user profiles on their Infra Net account. Each profile offers the data and functions that are most relevant for their specific needs.
To adapt to? the INFRA system Sigicom provided some basic assistance and training, but after that we manage the INFRA system autonomously without problems.
INFRA C22 wireless triaxial vibration monitor is a wireless triaxial geophone and data logger built into the same compact unit. The vibration monitor has GSM/GPRS-communication, GPS position and time synchronization.
With INFRA S50 Sound Level Meter it is easy to perform unattended monitoring of Noise from Building activities and traffic.
INFRA X20DM2 Dust Monitor is a high-quality sensor that simultaneously measures the airborne particle concentrations of PM10, PM2.5, PM1.0 and TSP.