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p 56
Chapter 2
Helical Foundation Systems
CHAPTER 2
HELICAL FOUNDATION SYSTEMS
Load transfer and Lift:
• Set lift cylinders and apply load to project
specifications. Discontinue if structure begins
to lift prior to achieving the design working
load. Alternatively, load can be increased until
the structure lifts and the desired elevation is
met
(Figure 2.12.3.2.g)
.
• Lock off and transfer load to piers by tightening
nuts down to cap plate.
• Remove lifting hardware and hydraulics.
• Complete field installation logs.
• Establish bench marks (if required).
Backfill and cleanup:
• Backfill holes or trenches with the excavated,
on-site material or imported soil.
• Follow proper backfill/compaction procedures
and tamp in maximum 6 to 12-inch lifts
depending upon type and weight of compaction
equipment
(Figure 2.12.3.2.h)
.
• When possible, establish grades to allowpositive
surface drainage away from the structure.
• Clean up and haul away construction debris
from the piering operation.
Should field conditions present unanticipated
obstacles that require relocating any of
the proposed piers, consult the engineer of
record for approval before proceeding.
Figure 2.12.3.2.h
Backfill and compact soil
Figure 2.12.3.2.g
Set hydraulic lift cylinders