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Raft Foundation Construction

In the Open Standard
Alan BurnsMember for 22 years 3 months
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Hi all,

Does anyone have any detailed information on what they view as the correct sequencing for the construction of a raft foundation, the project is a £6 million steel framed school. There is great debate in our office at present!!

Hope someone can help,

A.
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8 replies

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  1. 0
    Dayanidhi Dhandapany ·
    #1
    If you have construction drawings for the raft foundation(for an example), you can develop the construction sequence.

    If you have divided the raft area into some zones, then for any zone the probable construction sequence would be

    Excavation->Blinding->Reinforcement->Sideformwork->Concreting->Curing->RemovalofFormwork and then based on the design/drawing if you have steel column works, you can develop the program further as provision for fixing of base plates(before concreting), steel column members etc...............
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  2. 0
    Alan Burns ·
    #2
    Think I may have won the arguement my friend, thanks!
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  3. 0
    Jaco Stadler ·
    #3
    What about underground services. Ducts etc.

    A Simple rule is from bottom to top.
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  4. 0
    Asif Anwar ·
    #4
    Don’t forget to allow for any temporary works required especially if it is a deep foundation.

    Asif
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  5. 0
    Dayanidhi Dhandapany ·
    #5
    To avoid all these doubts of underground services/deep fdns etc., develop the construction schedule sequence based on the construction drawings.
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  6. 0
    Darrell ODea ·
    #6
    Don’t forget to make it out of wood or plastic, it floats better that way.

    Prefabricate it off site & just deliver & position.

    QED
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  7. 0
    Roger Thomas ·
    #7
    Many a true word said in jest Darrell. The foundations for the cills in the Thames Barrier were constructed in dry dock and then floated into position.
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  8. 0
    Darrell ODea ·
    #8
    Roger,
    Would you believe that I knew someone would support my comment. Don’t know why.

    Pre-fabricate everything. They had the right concept in mind in the 60’s, with system building.

    D.
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