Geodetic and geotechnical permanent monitoring of a deep excavation pit
Project: 2016 - 2019, Zürich, Switzerland
Client: Swiss Federal Institute of Technology (ETH) & Steiner AG
The excavation pit for the new ETH research building in Zurich is a technical challenge and contains all the difficulties of special civil engineering, such as pre-stressed diaphragm walls, bored piles with multiple back-anchoring, underpinning with micro piles and jetting, etc.
A construction pit of this depth in a steep slope in the city centre is highly dangerous and its behaviour must be monitored intensively using measurement technology.
Services
Permanent 3D monitoring of the excavation walls and surrounding buildings
Installation and operation of geodetic and geotechnical monitoring systems
Data transmission to the data loggers, partly wired and partly via radio
Alarm when limit values are exceeded
Project in collaboration with AFRY Schweiz AG, which carried out crack recordings on the surrounding buildings and manual deformation measurements on buildings and tram rails.
Technologies
2 precision total stations with 100 monitoring points
9 chain inclinometers, each with 15 sensors (135 sensors in total)
6 5-fold extensometers (30 sensors)
70 anchor force sensors
TEDAMOS Web, password-protected customer portal with 24/7 access
