New tool for choosing micropile type Decay modeling of wood pile foundations in Turku, Finland (original) (raw)

2012

Abstract

Wood piles have been used in Turku mainly as supporting or cohesive piles. Cohesive piles were popular in the 19 century and at the beginning of the 20 century under foundations, where clay layers are more than 15 m thick. End bearing piles became more popular in the 1950 ́s and use of end bearing wood piles continued up to the 1970 ́s until pre-cast concrete piles came into common use. Decay of wood piles has been observed in several cases due to lowering or contaminated ground water. The buildings may settle either due to decaying wood piles or due to settling of cohesive piles, sometimes as a combination of these factors. A decay model has been developed to classify the phenomena in Turku for wood pile foundations, based on observations in the DATU database. The classification model can be utilized when designing micropile types or load transfer structures for underpinning. The type of micropiles and load transfer structures has influence on the costs and duration of underpinning...

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