TY - GEN
T1 - Influence of moisture content on the assessment of decay levels by micro-drilling measurements in wooden foundation piles
AU - Mirra, Michele
AU - Pagella, Giorgio
AU - Gard, Wolfgang
AU - Ravenshorst, Geert
AU - Van De Kuilen, Jan Willem
N1 - Publisher Copyright:
Copyright © (2023) WORLD CONFERENCE ON TIMBER ENGINEERING 2023 (WCTE 2023) All rights reserved.
PY - 2023
Y1 - 2023
N2 - 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.
AB - 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.
UR - http://www.scopus.com/inward/record.url?scp=85171297512&partnerID=8YFLogxK
U2 - 10.52202/069179-0530
DO - 10.52202/069179-0530
M3 - Conference contribution
AN - SCOPUS:85171297512
T3 - 13th World Conference on Timber Engineering, WCTE 2023
SP - 4079
EP - 4086
BT - 13th World Conference on Timber Engineering, WCTE 2023
A2 - Nyrud, Anders Q.
A2 - Malo, Kjell Arne
A2 - Nore, Kristine
A2 - Alsen, Knut Werner Lindeberg
A2 - Tulebekova, Saule
A2 - Staehr, Efthymia Ratsou
A2 - Bergh, Gabrielle
A2 - Wuyts, Wendy
PB - World Conference on Timber Engineering (WCTE)
T2 - 13th World Conference on Timber Engineering: Timber for a Livable Future, WCTE 2023
Y2 - 19 June 2023 through 22 June 2023
ER -