Distributed fibre optic sensing during different anchor pullout tests

Madeleine Winkler, Helmut Woschitz, Václav Račanský

Research output: Chapter in Book/Report/Conference proceedingConference paperpeer-review

Abstract

Although ground anchors are widely used in fields of civil engineering, as in soil and rock stabilization or anchoring structures, such as excavation pits, retaining walls or tunnel constructions, the load transfer behaviour has not been entirely investigated yet. Ground anchors are usually monitored by load cells at the anchor head or by strain gauges at selected points along the anchor, which both do not deliver reliable information along the entire anchor. Distributed strain sensing provides an opportunity to get the strain information along the entire length of the anchor, on the tendons as well as in the grout, as we have already shown in a preliminary anchor test. However, there were still lots of issues, which did not allow a general conclusion for all anchor types and ground conditions. Thus we investigated further ground anchors in different soil conditions (clay, rocklike material and gravel), within a research project. This paper gives an overview of the sensor systems used, the obtained results of the anchor pullout tests, gathered experiences and finally gives a brief concept of a monitoring anchor for long term monitoring.
Original languageEnglish
Title of host publicationEuropean Workshop on Optical Fibre Sensors, EWOFS 2023
EditorsMarc Wuilpart, Christophe Caucheteur
Number of pages5
ISBN (Electronic)9781510665002
DOIs
Publication statusPublished - 2023
Event2023 European Workshop on Optical Fibre Sensors: EWOFS 2023 - Wallonia Conference Centre Mons, Mons, Belgium
Duration: 23 May 202326 May 2023
https://www.ewofs2023.org/ewofs2023

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
Volume12643
ISSN (Print)0277-786X
ISSN (Electronic)1996-756X

Conference

Conference2023 European Workshop on Optical Fibre Sensors
Abbreviated titleEWOFS 2023
Country/TerritoryBelgium
CityMons
Period23/05/2326/05/23
Internet address

Keywords

  • distributed strain sensing
  • geotechnical ground anchor
  • load transfer
  • monitoring anchor

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Applied Mathematics
  • Electrical and Electronic Engineering
  • Computer Science Applications

Fields of Expertise

  • Sustainable Systems

Treatment code (Nähere Zuordnung)

  • Application

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