CETN-III-33
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IS CQCI checking that prestressed precast concrete
piles
are of
a.
uniform shape and straight? Are broken precast concrete piles being
rejected by CQCI?
Is CQCI checking H-piles, a n d pipe piles received from
supplier or
b.
m a n u f a c t u r e r for defective welds or rivets and for fit
at splices?
Double-check a few. Is CQCI checking H-piles for bends
In flanges and
f o r flange injuries that occurred in shipment or during
handling?
c. Is CQCI checking dimensions and the following criteria regarding
s t r a i g h t n e s s and quality of round timber piles?
( 1 . ) Crooks should not exceed half the diameter of the pile at the
m i d d l e of the bend.
( 2 . ) In short bends, t h e distance from the center line of the pile to
a line stretched from the centers above and below the bend should not
exceed 4% of the bend length, or 2.5 inches (6.3 cm).
( 3 . ) A straight line between centers of butt and tip should fall
w i t h i n the pile.
( 4 . ) The taper should be uniform from butt to tip.
(5.) Wood piles should not have large or loose knots, shakes, splits,
d e c a y or reverse bends.
(6 .) Piles should be debarked.
5. Assure that CQCI is making certain that pile measuring crew is making
measurements from tip of pile upwards. Has CQCI banned use of cloth tapes,
d u e to their tendency to stretch, a n d is crew using exclusively steel tapes?
I s total length being indicated on each pile near top? Measure a few piles
y o u r s e l f to double-check. Is CQCI checking other pile requirements such as
b u t t and tip diameter? ( B e w a r e of tip and butt diameters of timber piles
being smaller than the minimums set forth in ASTM D25).
INITIAL AND FOLLOWUP INSPECTIONS
c.
1. A r e all cuts and breaks in timber piles being treated with creosote?
A r e holes in timber piles being filled with hot creosote after being bored?
A r e any unused holes being tightly closed by a treated plug? Are all areas of
coated H-piles, where the coating has been rubbed or scraped off during
h a n d l i n g , being retouched with coal tar epoxy coating?
2. C h e c k whether piles are to be driven to refusal, a specified bearing,
o r depth. Check the minimum penetration, bearing values, and required pile
l e n g t h s , I f a p p l i c a b l e . A l s o , i f a p p l i c a b l e , s e e which pile driving formula
w i l l be required to calculate the bearing values.
3 . I s the operation of the pile driver satisfactory? Is ram operating at
f u l l stroke? Is it operating at rated speed and fully recommended operating
pressure that is shown in the manufacturer's brochure? Slowing of-hammer
d u r i n g its travel? C o n t i n u o u s driving until penetration is attained? (The
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