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The contractor should be responsibi>_ for meriting the leads in 1-foot increments, beginning at the
tip of the leads, and should use enlarged numerals to indicate the depth of penetration at 5-foot
intervals. T;ae markings should be such that they are not obliterated or made unreadable during
OR
drilling.
M! The geotechnical engineer should keep a complete written record of :�ach pile drilled, noting the
date, time, type, location, diameter, verticality and drilling rate. The record should also reflect
"1 any work stoppages during drilling, and details of the ancillary equipment being used- The
contractor should also record hole volumes, grout pump pressures, number of pump strokes, and
concrete volumes pumped. Copies of these records should be provided to you, the contractor.
and the architect for review.
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d The contractor should be responsible for notifying the eeotechrtical engineer at least 48 hours to
advance of starting or restarting any pile drilling work, he should not proceed with the work
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r+ unless the geotechnical engineer is present on the site.
.r Submittals: The contractor should submit the following information before beginning work on
the site
'r Before any concrete is placed in auger -cast piles, the contractor should furnish for
approval a concrete mix design for each type of concrete to be used and a curve
indicating flow- rate per stroke for the grout pump.
• List of equipment intended to be utilized in augering noting size and lead lengths-
Augering Equipment: Aueering equipment should have a motor of sufficient size and energy to
auger through anticipated subsurface strata.
Leads During augering operations, the hollow stem auger should be held firmly in proper
alignment by fixed driving leads. The leads and auger must be long enough to auger the pile
hole in one continuous motion to the design tip elevation.
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Grout Pump The grout pump should be of sufficient size to contiruousl. pump grout at
+ sufficient pressure and volume to present the hole from sloughing or heaving as the auger is
withdrawn.
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