Nothing Special   »   [go: up one dir, main page]
Scribd Logo
Upload

Welcome to Scribd!

  • 48 views

    Présentation Vérin SC2

    Uploaded by

    Vladimir Simeunovic
    This document provides instructions for using tensioning jacks and pumps to tension strands. It describes the steps of tensioning, locking-off, returning the jack, and releasing pressure from the circuits. The tensioning process involves using a pump to supply oil to the jack's tensioning chamber to pull the strands tight. Locking-off locks the strands in place by supplying the locking-off chamber. The jack then returns by supplying the return chamber.

    Copyright:

    © All Rights Reserved
    Download as PPT, PDF, TXT or read online from Scribd

    Présentation Vérin SC2

    Uploaded by

    Vladimir Simeunovic
    48 views55 pages
    This document provides instructions for using tensioning jacks and pumps to tension strands. It describes the steps of tensioning, locking-off, returning the jack, and releasing pressure from the circuits. The tensioning process involves using a pump to supply oil to the jack's tensioning chamber to pull the strands tight. Locking-off locks the strands in place by supplying the locking-off chamber. The jack then returns by supplying the return chamber.

    Original Description:

    2

    Copyright

    © © All Rights Reserved

    Available Formats

    PPT, PDF, TXT or read online from Scribd

    Did you find this document useful?

    Is this content inappropriate?

    This document provides instructions for using tensioning jacks and pumps to tension strands. It describes the steps of tensioning, locking-off, returning the jack, and releasing pressure from the circuits. The tensioning process involves using a pump to supply oil to the jack's tensioning chamber to pull the strands tight. Locking-off locks the strands in place by supplying the locking-off chamber. The jack then returns by supplying the return chamber.

    Copyright:

    © All Rights Reserved
    Download as PPT, PDF, TXT or read online from Scribd
    Download as ppt, pdf, or txt
    48 views55 pages

    Présentation Vérin SC2

    Uploaded by

    Vladimir Simeunovic
    This document provides instructions for using tensioning jacks and pumps to tension strands. It describes the steps of tensioning, locking-off, returning the jack, and releasing pressure from the circuits. The tensioning process involves using a pump to supply oil to the jack's tensioning chamber to pull the strands tight. Locking-off locks the strands in place by supplying the locking-off chamber. The jack then returns by supplying the return chamber.

    Copyright:

    © All Rights Reserved
    Download as PPT, PDF, TXT or read online from Scribd
    Download as ppt, pdf, or txt
    of 55

    PT TRAINING 2006

    Tensioning jacks functioning


    Monostrand SC2 Jack

    Tensioning
    Pump

    Multi-strands
    C-Jacks
    Monostrand SC2 Jack
    Locking-off
    Supplying of the
    return chamber +
    locking-off

    Return

    Supplying of the
    tensioning chamber
    Tensioning pump – P5

    Tensioning
    levers

    Label for the utilisation of


    the pump distributor

    Tensioning Return / Locking-off


    manometer Levers

    Connexion of the Return / Locking-off


    flexible hoses Manometer
    SUPPLYING LEVER FOR SUPPLYING LEVER FOR
    THE TENSIONING THE LOCKING-OFF AND
    CHAMBER
    Manual Distributor THE RETURN CHAMBER

    of the pump

    OPEN CLOSED
    TENSIONING (FLOW BACK TO THE CLOSED OPEN
    OIL RESERVOIR AND (FLOW BACK TO THE (JACK RETURN)
    BLOCAGE OF THE OIL RESERVOIR)
    TENSIONING
    CHAMBER)

    FLOW BACK TO THE OIL FLOW BACK TO THE OIL


    RESERVOIR FOR THE RESERVOIR OF THE
    TENSIONING CHAMBER LOCKING-OFF AND THE
    RETURN CHAMBER

    CLOSED OPEN
    (MISE EN TENSION (FLOW BACK TO THE
    ET BLOCAGE OIL RESERVOIR) OPEN CLOSED
    CHAMBRE DE (FLOW BACK TO THE (JACK RETURN)
    TENSION) OIL RESERVOIR)

    FLOW BACK
    TO THE OIL
    RESERVOIR FLOW BACK
    TO THE OIL
    SUPPLYING OF THE RESERVOIR
    TENSIONING
    SUPPLYING OF THE SUPPLYING OF THE
    CHAMBER
    DISTRIBUTOR LOCKING-OFF AND
    THE RETURN CHAMBER
    RESERVOIR
    Pump and Jack
    Connexion

    Oil supplying
    Oil
    reservoir
    Manual distributor of the pump

    Tensioning Locking-off

    Pressure fall down Return of the


    in the tensioning piston
    chamber
    Piston
    Locking-off chamber Barrel of the
    jack

    Temporary
    jaw
    Return chamber

    Tensioning chamber
    Installation of the
    jack

    Elastic washers
    Spring

    Temporary Open position


    jaw
    Threading of the jack on the
    strand
    Threading of the jack on the
    strand
    Threading of the jack on the
    strand
    Anchorage jaw

    Threading of the jack on the


    strand
    Minimal strand
    overlength
    Before starting the
    tensioning operation, none of
    the hydraulic circuit is under
    pressure.
    Phase : TENSIONING

    Starting of the tensioning


    operation, oil entry and
    progressive pressure rising-
    up in the tensioning chamber
    Phase : TENSIONING

    Starting of the tensioning


    operation, the barrel of the
    jack moves and drives the
    tempory jaw which tighten on
    the strand.
    Phase : TENSIONING

    Starting of the tensioning


    operation, the barrel of the
    jack moves and drives the
    tempory jaw which tighten on
    the strand.
    Phase : TENSIONING

    Starting of the tensioning


    operation, the barrel of the
    jack moves and drives the
    tempory jaw which tighten on
    the strand.
    Phase : TENSIONING
    Phase : TENSIONING

    The oil fills the tensioning


    chamber. The pressure rises
    up, driving the strand.
    Phase : TENSIONING

    The oil fills the tensioning


    chamber. The pressure rises
    up, driving the strand.
    Phase : TENSIONING

    The oil fills the tensioning


    chamber. The pressure rises
    up, driving the strand.
    Phase : TENSIONING

    The oil fills the tensioning


    chamber. The pressure rises
    up, driving the strand.
    Phase : LOCKING-OFF

    At the end of the tensionng operation, the


    supplying of the tensioning chamber is
    closed, the pressure is maintained. The
    Return/Blocage circuit is supplied.
    Phase : LOCKING-OFF

    As the tensioning chamber is under


    pressure, the filling of the return
    chamber is limited. Oil is supplied in
    the locking-off chamber.
    Phase : LOCKING-OFF

    Supplying and opening of the


    locking-off chamber.
    Phase : LOCKING-OFF

    Supplying and opening of the


    locking-off chamber.
    Phase : LOCKING-OFF

    Supplying and opening of the


    locking-off chamber.
    Phase : LOCKING-OFF

    Supplying and opening of the


    locking-off chamber.
    Phase : LOCKING-OFF

    The jaws of the anchorage block are all individually


    pushed in order to ensure their correct position
    during the anchoring load transfer.
    Phase : LOCKING-OFF
    Phase : LOCKING-OFF

    At the end of the locking-off operation, all the


    chambers of the jack are under pressure.
    NOTA : The maximum pressure is indicated for
    each type of jack.
    Phase : PRESSURE RELEASE in
    the TENSIONING CHAMBER

    Once the locking-off is achieved,the pressure can be


    released in the tensioning chamber. The fall of the
    pressure shall be progressive. In this purpose, slowly
    operate the flow back lever of the tensioning pump.
    Phase : RETURN

    As the tensioning chamber is not under


    pressure anymore, operate the
    supplying circuit of the return chamber
    the move back the barrel of the jack.
    Phase : RETURN

    As the tensioning chamber is not under


    pressure anymore, operate the
    supplying circuit of the return chamber
    the move back the barrel of the jack.
    Phase : RETURN

    As the tensioning chamber is not under


    pressure anymore, operate the
    supplying circuit of the return chamber
    the move back the barrel of the jack.
    Phase : RETURN

    As the tensioning chamber is not under


    pressure anymore, operate the
    supplying circuit of the return chamber
    the move back the barrel of the jack.
    Dewedging

    Elastic washers
    Temporay
    jaw Temporary
    Spring
    As the piston is completely back in the
    barrel, the temporary jaw is compressed
    between the elastic washers and the spring,
    occuring the free movement of the strand
    Phase : PRESSURE RELEASE in the
    RETURN / LOCKING-OFF CIRCUIT

    As the jack is back in the close position, release


    the pressure in the Return / Locking-off circuit.
    The locking-off chamber closes up under the
    action of the return spring.
    Phase : PRESSURE RELEASE in the
    RETURN / LOCKING-OFF CIRCUIT
    Phase : PRESSURE RELEASE in the
    RETURN / LOCKING-OFF CIRCUIT
    Phase : PRESSURE RELEASE in the
    RETURN / LOCKING-OFF CIRCUIT
    Phase : PRESSURE RELEASE in the
    RETURN / LOCKING-OFF CIRCUIT

    The locking-off chamber closes up.


    END OF TENSIONING

    The jack can be removed from the


    tensioned strand.
    END OF TENSIONING

    The jack can be removed from the


    tensioned strand.
    MULTISTRAND JACKS

    JACK CC500/95
    Barrels

    Piston

    Tête
    d’adaptation
    MULTISTRAND JACKS

    JACK CC1000/95

    Tubes
    rétractiles
    MULTISTRAND JACKS

    Return
    chamber
    Tensioning
    chamber

    Locking-off
    chamber

    Piston

    Temporary
    jaw
    MULTISTRAND JACKS

    Tensioning
    chamber
    THE END

    You might also like