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    Precast Concrete Pile Sections:: Prestressed Concrete Piles General Information

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    Samishi
    Prestressed concrete pile sections used by the Structure and Bridge Division are from AASHTO/PCI standard sections. Concrete must have a minimum 28-day compressive strength of 5000 psi and 3500 psi strength at release. Reinforcement includes 1/2" prestressing strands in a symmetrical pattern, #5 spiral ties, and epoxy coated or galvanized reinforcement for piles exposed to tidal water. The design bearing capacities in the section properties table are based on structural strength, but the actual design capacity depends on geotechnical evaluation of the pile-soil system.

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    Precast Concrete Pile Sections:: Prestressed Concrete Piles General Information

    Uploaded by

    Samishi
    45 views2 pages
    Prestressed concrete pile sections used by the Structure and Bridge Division are from AASHTO/PCI standard sections. Concrete must have a minimum 28-day compressive strength of 5000 psi and 3500 psi strength at release. Reinforcement includes 1/2" prestressing strands in a symmetrical pattern, #5 spiral ties, and epoxy coated or galvanized reinforcement for piles exposed to tidal water. The design bearing capacities in the section properties table are based on structural strength, but the actual design capacity depends on geotechnical evaluation of the pile-soil system.

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    Original Title

    PC-Piles-12

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    Prestressed concrete pile sections used by the Structure and Bridge Division are from AASHTO/PCI standard sections. Concrete must have a minimum 28-day compressive strength of 5000 psi and 3500 psi strength at release. Reinforcement includes 1/2" prestressing strands in a symmetrical pattern, #5 spiral ties, and epoxy coated or galvanized reinforcement for piles exposed to tidal water. The design bearing capacities in the section properties table are based on structural strength, but the actual design capacity depends on geotechnical evaluation of the pile-soil system.

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    © All Rights Reserved
    Download as PDF, TXT or read online from Scribd
    Download as pdf or txt
    45 views2 pages

    Precast Concrete Pile Sections:: Prestressed Concrete Piles General Information

    Uploaded by

    Samishi
    Prestressed concrete pile sections used by the Structure and Bridge Division are from AASHTO/PCI standard sections. Concrete must have a minimum 28-day compressive strength of 5000 psi and 3500 psi strength at release. Reinforcement includes 1/2" prestressing strands in a symmetrical pattern, #5 spiral ties, and epoxy coated or galvanized reinforcement for piles exposed to tidal water. The design bearing capacities in the section properties table are based on structural strength, but the actual design capacity depends on geotechnical evaluation of the pile-soil system.

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    © All Rights Reserved
    Download as PDF, TXT or read online from Scribd
    Download as pdf or txt
    of 2

    PRECAST CONCRETE PILE SECTIONS:

    The prestressed concrete pile sections used by the Structure and Bridge Division and listed in
    File No. 12.06-2 along with their section properties are taken from the AASHTO/PCI standard
    prestressed concrete pile sections.

    CONCRETE:
    Concrete used in the design of prestressed concrete piles shall be Class A5 having a minimum
    28 day compressive strength of 5000 psi.

    The minimum compressive strength of concrete required at release shall be 3500 psi.

    When piles are exposed in bridges over tidal water such as in pile bents and in footings
    constructed above Mean High Tide elevation, the concrete shall be cured and finished in
    accordance with Section 404 of the VDOT Road and Bridge Specifications.

    REINFORCEMENT:
    All prestressed and non-prestressed reinforcement used in the design and fabrication of
    prestressed concrete piles shall conform to the requirements contained in File Nos. 12.01-1
    and -2, and as specified below.

    Prestressing strands used in the design of the prestressed concrete piles shall be 1/2” diameter
    strands.

    Spiral ties shall be #5 gage steel wire. For Seismic Performance Category B bridges or other
    structures, #4/0 gage wire or #3 reinforcing bars shall be used.

    Prestressing strands shall be laid out symmetrical about a vertical and horizontal axis through the
    centroid of the pile cross section. Strand pattern may be either square or circular.

    When piles are exposed in bridges over tidal water such as in pile bents and in footings
    constructed above Mean High Tide elevation, the spiral ties and all other reinforcing bars shall be
    epoxy coated or hot dipped galvanized.

    DESIGN BEARING CAPACITY:


    The design bearing capacities shown in the section properties table in File No. 12.06-2 are based
    on the structural strength of the pile section.

    The design bearing capacity of a pile used for foundation design is generally governed by the
    pile-soil system which is usually limited by the strength of the soil and not by the structural
    strength of the pile. Therefore, the designer shall have these loads evaluated by the
    Geotechnical Support section.

    S&B STANDARD DETAIL SHEETS AND CELL LIBRARIES:


    See Introduction File No. 12.00-1.

    PRESTRESSED CONCRETE VOL. V - PART 2


    DATE: 31Mar2006
    PILES SHEET 1 of 2
    GENERAL INFORMATION FILE NO. 12.06-1
    Section Properties
    Prestress
    Design
    Pile Force Effective
    Weight Moment Radius Total Bearing
    Size Section per Prestress
    Area @ of of Perimeter Number Capacity
    Modulus Strand
    150pcf Inertia Gyration of
    Strands
    W Ag I S r Pi fpc N
    (in2) (in2) (lbs/ft) (in4) (in3) (in) (ft) (lbs) (psi) (tons)
    10 100 104 833 167 2.89 3.33 4 28910 979 69
    12 144 150 1728 288 3.46 4.00 4 30970 751 103
    14 196 204 3201 457 4.04 4.67 6 30970 820 142
    16 256 267 5461 683 4.62 5.33 8 30970 836 185
    18 324 338 8748 872 5.20 6.00 10 30970 826 235
    20 400 417 13333 1333 5.77 6.67 12 30970 805 291
    22 484 504 19521 1775 6.35 7.33 14 30970 779 350
    24 576 600 27648 2304 6.93 8.00 16 30970 751 420

    Pi = Prestressing force per strand just prior to release after losses due to anchorage set and other
    factors.

    fpc = Compressive stress in concrete after total losses at c.g. of pile cross section.
    The design bearing capacity (pile strength) shown above is based on the
    equation N = Ag[0.33f’c – 0.27fpc] for concentrically loaded and laterally supported piles
    (kl/r values less than or equal to 60) fully embedded in soil using concrete having a strength
    of 5000 psi and the effective prestress shown above.

    PRESTRESSED CONCRETE VOL. V - PART 2


    DATE: 01Jun2005
    PILES SHEET 2 of 2
    SECTION PROPERTIES FILE NO. 12.06-2

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