Detaljer om förslaget

1 Scope

1.1 This document establishes general principles for the execution of bored piles as per the execution specifications.

NOTE 1 It is expected that the execution specifications define the execution standard to be applied based on EN 1997 where relevant.

NOTE 2 Piles which deviate from the following clauses in this section can be considered as bored piles provided the execution principles correspond to this document (see Clause 8).

1.2 This document applies to bored piles (see Figure 1) with:

— uniform cross-section (straight shaft);

— telescopically changing shaft dimensions;

— excavated base enlargements; or

— excavated shaft enlargements.

1.3 This document generally applies to bored piles with:

— a shaft diameter 0,3 m ≤ D ≤ 3,0 m;

— a depth to width ratio ≥ 5, with a depth ≥ 5 m;

NOTE This document can apply to bored piles with a shaft diameter of less than 0,3 m or more than 3,0 m where the general principles allow the execution in accordance with this document.

1.4 This document applies to permanent or temporary works for:

— piled foundations,

— retaining walls.

NOTE This document can apply to rigid inclusions for ground improvement, and to cut-off walls.

1.5 This document applies to piles with the following rake (see Figure 2):

— n ≥ 4 (Θ ≤ 14°);

— n ≥ 3 (Θ ≤ 18°) for permanently cased piles

— n ≥ 10 (Θ ≤ 6°) for piles where the reinforcement cage is installed after concrete placement.