Assessment and monitoring of a SFRC retaining structure: measurement issues (part 2)

Title: Assessment and monitoring of a SFRC retaining structure: measurement issues (part 2)
Author(s): M. Scaioni, M. Alba, A. Giussani, F. Roncoroni
Paper category : conference
Book title: RILEM Symposium on On Site Assessment of Concrete, Masonry and Timber Structures - SACoMaTiS 2008
Editor(s): L. Binda, M. di Prisco, R. Felicetti
Print-ISBN: 978-2-35158-061-5
e-ISBN: 978-2-35158-075-2
Publisher: RILEM Publications SARL
Publication year: 2008
Pages: 605 - 614
Total Pages: 10
Nb references: 8
Language: English

Abstract: This paper deals with a solution for the problem of monitoring 3-D displacements of Control Points on a SFRC retaining structure designed for stabilizing unstable slopes (see Part 1). A robotic total station was used to perform measurements during both placement stage and first months of standard life. To compare all observations taken at different epochs, the instrument was georeferenced into a Local Reference System which is permanently materialized through monuments. Even though displacements interesting the shelters were always under the statistical significance level of measurements, some trends were easily outlined. On the other hand, empirical tests showed that the achievable accuracy of this monitoring technique is better than how much is theoretically expected. Indeed, the repositioning of the total station on the same relative position with respect to the observed panels, it allows to reduce many systematic effects intrinsic to observations. A twofold achievement was reached. Firstly, measurements made possible to compare foreseen and real static behaviour of the retaining structures. Secondly, a monitoring system to be applied in such cases was setup and tested. Its capabilities and limitations were then outlined. Moreover, the total station based monitoring system is integrated by other sensors able to measure local displacements inside and on the surface of panels (FOS and Vibrating Wire Sensors).

Online publication: 2009-05-26
Publication type : full_text
Public price (Euros): 0.00