3.1.7
Tolerances in Driving
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NOTE: Foundation piles should not be more than 75
mm to 150 mm (3 to 6 inches) from their intended
plan position.
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Top of pile at elevation of cut off shall be within [_____] mm inches of
the location indicated. [Additionally, a variation in batter, as measured
on the driven pile, of not more than 6 mm per m 1/4 inch per foot of
longitudinal axis will be permitted.] Manipulation of piles to force them
into position will not be permitted. Piles will be checked for heave.
Piles found to have heaved shall be redriven to the required point
elevation. Piles damaged or driven outside the above tolerances shall be
replaced or additional piles driven at locations specified by the
Contracting Officer at no expense to the Government.
3.1.8
Cutting of Piles
Piles shall be cut off at the elevations indicated by a method approved by
the Contracting Officer.
3.1.9
Protection
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NOTE: Choice of pile protection is ultimately based
on economics; more than one type of protection
usually will be used on a structure to provide the
most economical, adequate protection. The following
criteria apply:
a. Paint protection is usually low in initial cost
but may require relatively frequent maintenance, and
it is extremely difficult to renew in the tidal zone
between mean tide and low tide.
b. Cathodic protection is low in initial cost and
low in maintenance. It can be of value only where
the piles are continually wet as in the submerged
zone.
c. Concrete encasement or metal jacketing are
relatively expensive in initial cost but require no
maintenance if properly constructed. When concrete
encasement is to be continuously submerged in water
with low resistivity it should extend to the mud
line or the steel should be coated to electrically
insulate the concrete from the steel.
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Where indicated, the steel H-piles shall be provided with [coatings]
[cathodic protection] [and] [concrete encasement].
SECTION 02456A
Page 11
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