Guided wave models to characterize unknown piles

Signal & data processing, Science & engineering

UNMET NEED

Information to characterize properties of piles used in land or marine foundations of civil engineering structures, such as bridges and buildings, is not always available. Missing, outdated, or inaccurate foundation plans make it difficult to determine initial properties. Additionally, the degradation of pile foundations affected by scouring or corrosion leads to accelerated damages.

Current measurement methods require either invasive and costly drilling along the length of the piles or involve the use of sensors placed on the accessible pile surfaces, but whose acoustic models remain imprecise and incomplete for carrying out an in-depth analysis.

More rapid, exhaustive and accurate methods are needed to identify degradations, enable effective monitoring of a structure’s service life, and allow the potential reuse of existing piles which can result in significant cost savings in the context of renovation and rehabilitation projects.

TECHNOLOGY OVERVIEW

Professor Maghoul and her research team at the Polytechnique Montréal have combined their expertise in civil engineering and acoustic data processing to tackle the challenge of characterizing the properties of deeply buried piles.

The team developed two inventive acoustic data processing methods to model unknown piles from guided wave sensing. One is based on the periodic analysis of acoustic signals from guided waves to obtain an accurate measurement of pile length. The other is based on a genetic algorithm to obtain a three-dimensional wave model to quantify elasticity and mechanical strength of piles.

Their methods combined enable quick and effective multi-parameter estimation of pile foundations. The proof-of-concept studies carried out in the laboratory and in the field demonstrated errors of less than 5% on the modelled variables. The technology is now ready for field deployment and could be adapted to existing pile integrity testing methods and instruments.

 

COMPETITIVE ADVANTAGES

  • Simultaneous estimation of mechanical and geometric properties
  • Non-destructive testing robust either on top or side of piles
  • Compatible with wood, composite, concrete or steel piles (both solid and hollow)

 

BUSINESS OPPORTUNITY

  • Technology available licensing
  • Seeking industrial co-development partner

 

MARKET APPLICATIONS

  • Geotechnical services for structures and foundations
  • Civil Engineering and soil stabilization
  • Geotechnical instruments and pile integrity testing

 

IP PROTECTION

  • Two PCT patent applications

CONTACTS

Pr. Pooneh Maghoul

PRINCIPAL INVESTIGATOR
Professor, Polytechnique Montréal
Civil, Geological and Mining
Engineering Department

Sébastien Prince-Richard

CONTACT
Project Director, Business Development
C 833-622-7843
sebastien.prince-richard@axelys.ca