Influence of moisture content on the assessment of decay levels by micro-drilling measurements in wooden foundation piles

Michele Mirra, Giorgio Pagella, Wolfgang Gard, Geert Ravenshorst, Jan Willem Van De Kuilen

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

2 Scopus citations

Abstract

In the historic city centre of Amsterdam (NL), the most widespread foundation system consists of wooden piles. With the aim of modelling and predicting remaining service life of these foundations and the piles in particular, one of the possible methods for collecting data and monitoring their condition consists of micro-drilling (MD) measurements. This work evaluates the reliability of MD measurements in identifying decayed portions and specific features of wooden foundation piles, considering different moisture content (MC) values. To this end, 24 segments were selected, sawn from wooden piles extracted from site, and having time in service (TS) of 2 to 294 years (with reference to 2021, the year of extraction). 240 MD measurements were conducted at varying MC values of 7% to 212%. The obtained MD profiles showed for all TS a slight decrease in drilling resistance when increasing MC. However, from the MD signals it is possible to reliably detect the areas affected by biodegradation phenomena (e.g. bacterial decay) along the drilling depth, regardless the MC of the segment or its gradient along the drilling depth. The present study contributes to research aiming at utilizing (in-situ) MD techniques for reliably assessing and quantifying decay and to be used in remaining service life planning of wooden foundation piles.

Original languageEnglish
Title of host publication13th World Conference on Timber Engineering, WCTE 2023
EditorsAnders Q. Nyrud, Kjell Arne Malo, Kristine Nore, Knut Werner Lindeberg Alsen, Saule Tulebekova, Efthymia Ratsou Staehr, Gabrielle Bergh, Wendy Wuyts
PublisherWorld Conference on Timber Engineering (WCTE)
Pages4079-4086
Number of pages8
ISBN (Electronic)9781713873297
DOIs
StatePublished - 2023
Event13th World Conference on Timber Engineering: Timber for a Livable Future, WCTE 2023 - Oslo, Norway
Duration: 19 Jun 202322 Jun 2023

Publication series

Name13th World Conference on Timber Engineering, WCTE 2023
Volume7

Conference

Conference13th World Conference on Timber Engineering: Timber for a Livable Future, WCTE 2023
Country/TerritoryNorway
CityOslo
Period19/06/2322/06/23

Fingerprint

Dive into the research topics of 'Influence of moisture content on the assessment of decay levels by micro-drilling measurements in wooden foundation piles'. Together they form a unique fingerprint.

Cite this