c.
If the minimum blow count is not obtained, the shaft shall be
drilled an additional [_____] meters feet and the penetration test
rerun.
d.
Reports shall be submitted to the Contracting Officer in
accordance with ASTM D 1586.
The Contracting Officer will approve tests and authorize subsequent
concrete placement or initiate redesign procedures.
3.5
PROOF TEST HOLE REQUIREMENTS
**************************************************************************
NOTE: Omit proof test holes if rock bearing is not
anticipated or nature of rock and extent of
principal testing makes further testing unnecessary.
**************************************************************************
Rock Soundness test shall conform to the following:
a.
After excavation, the rock below each caisson bearing level shall
be proof tested for soundness by percussion or rotary core
drilling one hole in each caisson in locations indicated.
b.
Holes shall be of 50 mm 2 inch diameter and drilled with a uniform
downward pressure to a depth below the bearing level equal to the
design caisson shaft diameter but to a minimum of 1.2 m 4 feet.
c.
Penetration time for successive 150 mm 6 inch increments shall be
recorded, noting conditions encountered.
The Contracting Officer will approve test holes and authorize subsequent
concrete placement or initiate redesign procedures.
3.6
LOAD TESTS
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NOTE: Specify load tests to confirm caisson design.
Indicate number, size, and location of test caissons
and sequence.
**************************************************************************
3.6.1
General Requirements
a.
Caisson load tests shall be performed in locations indicated.
b.
Tests shall be performed under supervision of a registered
engineer provided by the Contractor and in the presence of the
Contracting Officer. Test procedure shall be approved by the
Contracting Officer prior to commencement of work.
c.
Load shall be applied in concentric manner with magnitude of load
accurately determined and controlled.
d.
Top of caisson shall be laterally supported during entire load
test.
e.
[Caisson shall be loaded to [150] [200] percent of design load,
but shall not exceed ultimate concrete strength at time of
SECTION 02466A
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