inserted into this specification.
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The Contractor shall submit driller logs and records as specified in
paragraph Driller Logs. The presence of a Government inspector or the
keeping of separate drilling records by the Contracting Officer shall not
relieve the Contractor of the responsibility for the work specified in this
paragraph. Payment will not be made for any work for which the required
records have not been furnished by the Contractor.
3.2.7
Alignment
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NOTE: The specifier should consult PTI 4, paragraph
7.3.5. Tolerances are governed by project-specific
requirements. The practical lower bound is 0.01 rad
(0.5 degree).
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3.2.7.1
Tolerances
The anchor hole shall be located within [300] [_____] mm [12] [_____] inches
of the plan location. The entry angle shall be within [0.05] [_____] rad
[3] [_____] degrees of the specified inclination. The alignment of the
drilled hole shall be within [0.05] [_____] rad [3] [_____] degrees of the
theoretical alignment. If the hole alignment is not within these
tolerances, the hole shall be backfilled with cement or sand-cement grout
and a new hole drilled adjacent to the rejected hole.
[3.2.7.2
Alignment Check
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NOTE: Alignment checks are rarely performed for
soil anchors. Alignment check should only be
required when the actual alignment of the anchor is
critical to the design of the structure. Situations
where alignment is critical include: anchors through
structures with voids or embedded items, where there
is a possibility that anchors could intersect each
other, and where the purpose of the anchors is
overturning resistance.
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Each drilled hole shall be checked for alignment as specified herein upon
completion of drilling and before commencement of any other work.
Direction and inclination of all anchor holes shall be checked by the
Contractor for each [3-meter 10-foot] [_____] intervals throughout the
hole. Checking the alignment of each anchor hole shall be done by
measuring the inclination of the actual drilled anchor hole center line in
place with respect to the specified anchor center line. The specified
anchor center line shall consist of a single, straight, continuous line
extending from the top of the hole to the required bottom elevation of the
hole. Specified anchor centerlines shall slope at the inclinations shown
on the drawings. The Contracting Officer shall have access to holes for
alignment surveys that may include, but not be limited to, slope indicators
or other down-the-hole equipment. Drill rods may be required to be removed
from the hole or left in place as directed by the Contracting Officer.
Holes, or portions of holes, which are out of alignment shall be corrected
or filled with cement grout having a water-cement ratio of 0.40 or
SECTION 02490
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