Civil Engineering Reference
In-Depth Information
Work point
Work point
Top of jacket
New brace
welded to piles
Access window cut in
advance to allow wall
thicxness measurements
Vertical diagonal braces
removed from this bay
Leg-pile annulus
grouted from bottom
FIGURE 7.48
Flare jacket configuration and location of grouting.
Human access to the underside roller-bearing deck was required for attach-
ing beam clamps to support the weight of the new brace members during instal-
lation. Scaffolding to enable safe access to these locations from the flare bridge
and to provide a working platform was constructed prior to the start of repair
operations.
Repairs were carried out in the following sequence:
1. Pile wall-thickness survey
2. Refurbishment of roller bearings
3. Grouting of leg/pile annuli
4. Cutting of legs or crown weld shims
5. New horizontal braces for the two levels.
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