Questions and Answers
What is the primary advantage of using cantilever erection for bridge construction?
It is particularly suited for long span bridges and those far above ground or water level
Why is significant and accurate precambering necessary in cantilever erection?
To compensate for the deflections of the cantilevers under their own self-weight
What type of bridge elements can be easily brought in by barge for cantilever erection?
Pre-fabricated concrete segments
Why is temporary plan bracing typically required during cantilever erection?
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What additional loads may a steel structure be subjected to during cantilever erection?
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Study Notes
Cantilever Erection for Bridge Construction
- Primary advantage of using cantilever erection is that it allows for construction of bridges over water or other obstacles without the need for temporary supports.
Importance of Precambering
- Significant and accurate precambering is necessary in cantilever erection to ensure that the bridge structure will not sag or deform under its own weight after completion.
Bridge Elements for Cantilever Erection
- Large bridge elements, such as pier segments or roadway panels, can be easily brought in by barge for cantilever erection.
Temporary Plan Bracing
- Temporary plan bracing is typically required during cantilever erection to provide additional stability and resistance to wind and other external forces.
Additional Loads on Steel Structures
- During cantilever erection, a steel structure may be subjected to additional loads, including wind loads, construction loads, and other external forces.
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