center of each pile from the required location is 50 mm 2 inches at the
ground surface. No pile shall be out of required axial alignment by more
than 2 percent. Periodically check the required axial alignment of each
pile during the drilling operation and after reaching required tip
elevation with not less than 1.5 m 5 feet of the augerflight extending
above ground surface. Abandon piles which are damaged, mislocated, or out
of alignment beyond the maximum tolerance and provide additional piles
where directed.
3.2.6
Cutoff
Removal of pile butts above the indicated cutoff elevation may be
accomplished by dipping the grout from the pile, while grout is fluid, but
not less than one hour after installation. At the option of the
Contractor, and as approved prior to pile installation, grout may be
allowed to harden at its initial top elevation and then carefully trimmed
off to the indicated cutoff elevation with hand operated chipping guns.
3.2.7
Disposal of Excavated Material
Do not leave any piles partially completed overnight. Completely grout and
protect piles at the termination of each day's operation. Dispose of
excavated material, resulting from augering, [within the area indicated]
[off Government property] [_____].
3.3
FLOW CONE TEST
The quantity of water used shall produce a grout having a consistency of
not less than 21 seconds when tested with a flow cone in accordance with
ASTM C 939. [The flow cone shall be modified by removal of the 13 mm 1/2
inch orifice allowing grout to pass through the 19 mm 3/4 inch hole in
bottom of cone.] Conduct tests at the beginning of grout injection and at
subsequent intervals to ensure specification requirements are met.
3.4
GROUT SPECIMENS FOR LABORATORY TESTS
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NOTE: To be used as alternate requirement.
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Grout tests shall be conducted in accordance with [ASTM C 109/C 109M] [ASTM
C 942] in a laboratory, approved by the Contracting Officer. Test
specimens shall be prepared by pouring grout into 50 by 50 by 50 mm 2 by 2
by 2 inch cube molds. Not less than 9 cubes shall be cast during each
8-hour shift. Three cubes shall be tested at 7 days; 3 at 28 days; and 3
at 90 days.
3.5
GROUT SPECIMENS FOR CONTRACTOR TESTS
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NOTE: The requirement of this paragraph may be
waived by those agencies that so desire. Insert the
total number of pile holes requiring withdrawal of
auger before inserting the mortar. Withdrawal and
examination of the auger to verify soil profile
should be required at all test pile locations and at
10 percent of the remaining pile locations to
supplement the soil boring information.
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SECTION 02465
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