700-143Section 711 — Driven Pile Foundations
711.1Description
1 Furnish and drive foundation piles of the type and dimensions designated, including cutting off or building up foundation piles when required.
711.2Materials
711.2.1 Prestressed Concrete Piling 711.2.1.1 Concrete 1 Ensure that the materials, equipment, construction methods, etc., conform to Sections 701, 702, 703, and 704 unless otherwise specified in this Section.
711.2.1.2 Formwork 1 Ensure that f orms for concrete piling conform to the general requirements for concrete formwork as provided in Sections 702 and 704.
711.2.1.3 Reinforcement 1 Unless otherwise shown on the Plans, provide steel reinforcement consisting of longitudinal bars or strands in combination with spiral reinforcement in the form. Use reinforcement according to Section 703 or Section 704, whichever is applicable. Ensure that the reinforcing system is rigidly wired or fastened and held to true position in the forms by means of approved devices. Install splices in reinforcing steel as detailed on the Plans or accepted in writing by the BCE .
711.2.1.4 Casting 1 Cast piling in a horizontal position. Vibrate and tamp the concrete around the reinforcement, especially at the pile head, and avoid the formation of stone pockets, honeycomb, or other such defects that may require rejection of the piling. During the placing of the concrete, the forms may be vibrated with a hammer or wooden maul. Place concrete continuously in each pile and carefully spade, vibrate with an approved type of internal vibrator, and tamp. Avoid horizontal or diagonal cleavage planes. Properly embed the reinforcement in the concrete. Overfill the form, screed off the surplus concrete after a suitable period of time, and finish the top surface to a uniform, even texture similar to that produced by the forms.
711.2.1.5 Curing and Pointing 1 Cure prestressed concrete piling according to Section 704. When concrete has cured sufficiently, remove the side forms and carefully inspect the piling. Point