HIGH MODULUS WALLS IN UPDATED EN 12063-PPT Presentation

PPT Presentation

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The 2024 update to EN 12063, whose revision began in 2017, expands the standard’s scope from sheet-pile walls to include combined pile walls and high modulus walls. A high modulus wall is made entirely of piles similar to the primary piles in a combined wall; closer pile spacing gives it greater resistance. Examples include tubular-pile and H-pile walls.<br /><br />The updated standard adds guidance on percussive drilling for installing tubular piles, particularly Down-The-Hole (DTH) drilling. A hammer located inside the pile tube enables efficient penetration through hard layers, including rock, and pile embedment into bedrock. The standard also introduces Execution Classes EXC1–EXC3 and requirements for pile welding and weld inspection, without referring to EN 1090-2, which does not cover pile execution.<br /><br />Three case histories demonstrate high modulus tubular-pile walls installed by percussive drilling. At Helsinki’s Pasila Tripla development, piles supported excavations 18–21 metres deep under substantial water pressure. At Peterhead Harbour in Scotland, piles were drilled into bedrock as part of harbour deepening and quay-wall strengthening. At Melo Dam in Finland, a new wall was installed beside the existing dam core to address leakage; the project included piles up to 67 metres long and a wall area of approximately 4,500 square metres.

Keywords

EN 12063

2024 update

combined pile walls

high modulus walls

tubular piles

percussive drilling

Down-The-Hole drilling

pile welding

weld inspection

case histories