1.6.2
Caisson Drilling Equipment
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NOTE: Caisson drilling equipment criteria should be
evaluated and specified for contract site
conditions. Reference: Drilled Pier Foundations -
Woodward, Gardner, Greer - McGraw-Hill Book Co.
Requirements should be included for determination of
minimum equipment standards.
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downward force capacity for the contract site conditions.
1.7
SEQUENCE OF WORK
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NOTE: Sequence of work criteria should be modified
for agency requirements.
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1.7.1
Caisson Excavation
Excavation of caissons or groups of caissons shall be performed so that
reinforcing steel and concrete placement is a continuous operation
performed the same day that the excavation is completed. Excavations shall
not be left open overnight.
1.7.2
Acceptance
Concrete shall be placed within 3 hours after approval of the completed
excavation.
1.8
SUPERVISION, INSPECTION, AND SAFETY
1.8.1
Contractor Supervision
The Contractor shall provide for the supervision of all phases of drilled
pier construction. Supervision shall be the Contractor's responsibility as
outlined in Quality Control provisions of the SPECIAL CONTRACT
REQUIREMENTS. Each drilled pier excavation shall be checked by the
Contractor for its depth, water removal, cleanup, workmanship, and for all
tolerance requirements before any concrete is placed.
1.8.2
Government Inspection
The Contracting Officer will inspect each drilled pier excavation.
Concrete shall not be placed until the excavation has been approved by the
Contracting Officer. The Contractor shall furnish the Contracting Officer
all necessary equipment required for proper inspection of drilled pier
1.8.3
Safety Precautions for Workmen and Inspectors
1.8.3.1
Life Line
Each person entering a drilled pier excavation shall be provided with a
life line rigged so that the person can be immediately hoisted out of the
excavation in an emergency. The life line shall be suitable for instant
SECTION 02466A
Page 9
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