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5. Concreting deep foundations
In the case of foundation piles, concrete placement remains a delicate operation, and any defect risks causing the general ruin of the support and, therefore, of the structure. The following techniques can be validly used:
to the dip tube ;
to the pump pumping the concrete to the bottom of the pile;
with a controlled opening bucket, for large-diameter wells and bars.
In all cases, however, attention should be paid to the following points:
respect of concrete consistency, defined upstream by a target value ;
reinforcement cages held in position ;
hold the dip tube (or rigid pumping pipe) in the concrete as it rises to prevent...
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Concreting deep foundations
Conclusion
Bibliography
Standards and norms
- Admixtures for concrete, mortar and grout – Part 1: Common requirements. - NF EN 934-1 -
- Admixtures for concrete, mortar and grout – Part 2. - NF EN 934-2 -
- Admixtures for concrete, mortar and grout – Part 5: admixtures for sprayed concrete: definitions, requirements and conformity, marking and labelling. - NF EN 934-5 -
- Building work – Execution of concrete structures. - NF DTU 21 -
- Exécution...
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