Piles Innovations: Deep bored Piles for a hotel extension in the heart of Brussels-PPT Presentation

PPT Presentation

Pdf Summary

The presentation, delivered by Adrien Dumont on 23 May 2025, examines the challenges and opportunities of constructing deep foundations in central Brussels, including work associated with the Brucity renovation and ZIN Tower.<br /><br />The foundation scheme combined several pile types: jet-grout columns, bored piles up to 2,000 mm in diameter and 52 m long, groups of three 1,500 mm piles, and injected screw piles. Their specified ultimate loads ranged from negative loads for some elements to 30 MN for a three-pile group.<br /><br />Key construction challenges included controlling pile settlement and deviation, while accommodating large pile dimensions within a restricted urban jobsite. The presentation describes turning these constraints into opportunities through improved execution and design.<br /><br />One proposed approach was renewed use of polymer support fluid. Its advantages include avoiding a desander, requiring less site space, and potentially allowing disposal through the sewage system with authorization. Drawbacks include chemical considerations and the product’s viscous, slippery nature.<br /><br />Sustainability measures included tightening execution tolerances, optimizing foundation design, and using recycled grind in concrete. The overall success factors highlighted were an enhanced execution process, innovative technical solutions, and a strong focus on sustainability.

Keywords

deep foundations

Brussels

Brucity renovation

ZIN Tower

jet-grout columns

bored piles

pile settlement

polymer support fluid

sustainability

foundation design