3.4
JETTING OF PILES
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NOTE: Jetting should generally not be permitted for:
1. Piles dependent on side friction in
fine-grained, low-permeability soils (high clay or
silt content) where considerable time is required
for the soil to reconsolidate around the piles
2.
Piles subject to uplift
3.
Piles adjacent to existing structures
4. Piles in closely spaced clusters unless the load
capacity is confirmed by test and unless all jetting
is done before final driving of any pile in the
cluster.
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Jetting [may be used] [will not be permitted]. [Discontinue jetting when
the pile tip is approximately [1.5] [_____] meters [5] [_____] feet above
the ["calculated"] [indicated] pile tip elevation. Drive the pile the final
[1.5] [_____] meters [5] [_____] feet of penetration.]
3.5
PRE-AUGERING OR SPUDDING OF PILES
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NOTE: Pre-augering or spudding should generally not
be permitted for piles dependent on side friction in
fine-grained, low-permeability soils (high clay or
silt content) where considerable time is required
for the soil to reconsolidate around the piles.
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Pre-augering or spudding of piles [may be used] [will be required] [will
not be permitted]. [Discontinue pre-augering or spudding approximately
[_____] meters feet above the ["calculated"] [indicated] pile tip
elevation. Drive the pile the final [_____] meters feet of penetration.]
3.6
TREATMENT
Treat cut, bored, dapped, and damaged surfaces as specified in AWPA M4.
3.7
TOLERANCES IN DRIVING
A variation of not more than 6 mm per 300 mm 0.25 inch per foot of pile
length from the vertical for plumb piles or more than 13 mm per 300 mm 0.50
inch per foot of pile length from the required angle for batter piles will
be permitted. The center of butts must be within 100 mm 4 inches of the
location indicated. Manipulation of piles will not be permitted. In
addition to complying with the stated tolerances, the clear distance
between the heads of piles and the edges of pile caps shall be a minimum of
125 mm 5 inches. With prior approval of the Contracting Officer, provide
additional reinforcement and concrete to maintain the required minimum
clear distance. Any redesign of pile caps or additional work required due
to improper location of piles shall be the responsibility of the Contractor
and shall be approved by the Contracting Officer. Heaved piles shall be
SECTION 02458N
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