Civil Engineering Reference
In-Depth Information
Pre- and post-weld heating equipment
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Welding equipment
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Weld inspection equipment
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Equipment to remove marine growth and grit blast
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Temporary holding clamps to take the weight of additional members and to
maintain root gaps, as needed
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Crane capacity.
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7.12.5 Example: Platform Underwater Repair
The platform is a four-legged jacket platform operating in 21 m of water. The
jacket structure is horizontally braced at four levels with K-diagonal braces. The
platform was inspected immediately after Hurricane Andrew. The inspection
discovered that two midpoint joints, located at EL (
−
)12 m between the four
legs, were damaged.
Divers performed the wet welding repair work to replace the two damaged
joints.
The repair procedure was:
New joints were designed (see
Figure 7.37
)
●
The proper welding technique was determined by collection of specimens
from jacket structure and measuring the carbon equivalent
●
Wet welding specimens were tested
●
The two damaged joints were removed
●
FIGURE 7.37
New replacement part.
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