GeoStructures: Landslide La Frasse

Case study: 3DeMon System

Landslide monitoring
3D laser distance measurement

Project Description

Summary: Landslide continuous monitoring using 3DeMoN-ROBOVEC and geodetic prisms.

Clients: EPFL

Place: Le S?ey, VD (Switzerland)

Period: 2005 - N/A

Installation: EPFL / SMARTEC

Structure's short description: The "La Frasse" landslide is located the Vaud canton, Switzerland, not far from the city of Lausanne. A total of 11 points (9 on the landslide plus 2 reference points outside the sliding area) were equipped with a geodetic prism and are measured every hour. The PC managing the ROBOVEC was equipped with a WiFi / GPRS / EDGE card, allowing a real-time remote access to the measurements. A direct connection to the 220 VAC power supply is available on-site.

Aim of monitoring: The main aim of the project is to track and monitor the normal and known sliding behaviour of the slope, as well as to detect eventual reactivations of the landslide.

Number of sensor: 1

Main Results: Continuous measurement using 3DeMoN-ROBOVEC allowed detecting and tracking the last important reactivation of the landslide during sommer 2007.

ROBOVEC instrument installed on a pillar

Geodetic prims

Top view of the LaFrasse landslide with location of the targets

First monitoring results

Bibliography:

3DeMoN ROBOVEC ? Integration of a new measuring instrument in an existing generic remote monitoring platform , L. Manetti, G. Steinmann, 7th International Symposium on Field Measurements in Geomechanics, 24-27 September 2007, Boston, MA, 2007

3-Demon Monitoring Platform: Examples Of Applications In Structural And Geotechnical Monitoring Projects , Luca Manetti, Daniele Inaudi, Branko Glisic, 13th FIG Symposium on Deformation Measurement and Analysis, Lisbon, May 12-15, 2008