Guy Anchor

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    27-Nov-2015

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Anchor design

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  • Manta Ray Guy Manta Ray Guy Anchor

    ,

    55

    5526 27 2555

  • H-Frame (ERS)

    (2550) :

  • :

    ::

    (2550) :

  • :

    . :

    Anchor Anchor

    Fink and Beaty, 1999

  • .

    . 3 :

    1. Standard Guy Anchor2. Screw Helix Anchor3. Concrete Plate on Ground

    (2550) :

  • Standard Guy Anchor

    (2550) :

  • Screw Helix Anchor

    (2550) :

  • Concrete Plate on Ground

    (2550) :

  • (i)

    1.

  • (ii)2.

  • :

    : (ERS)

  • (i)

    Standard Guy Anchor :

  • (ii)

    Screw Helix Anchor :

  • Manta Ray Guy Anchor

  • HydraulicRam

  • Load cellExtensio-meter

    Load cell

    T i dTripod

    Dummy Load cell

  • (m)

    (kN)

    (kN) (kg)

    (cm2)MR-SR 2-10 178 133 9 5 916MR-SR 2-10 178 133 9.5 916MR-1 2-10 178 133 5.4 458

    MR SR MR 1MR-SR MR-1

  • No.

    (m)

    1 12/4C 230 - MR-SR 2.70

    2 9/1 230 - MR-SR 3.36

    3 15/1 115 1-2 MR-SR 4.00

    4 14/2 115 1-2 MR-1 4.00

  • 50

    Location 3 w/ MR-SRX: ultimate states

    40k

    N

    )

    30

    o

    a

    d

    ,

    F

    (

    k

    20

    P

    u

    l

    l

    o

    u

    t

    l

    o

    Location 1 w/ MR-SR

    Location 2 w/ MR-SR

    10

    P Location 1 w/ MR-SR

    Location 4 w/ MR-1

    0 10 20 30 40 50 60 70 800

    Location 4 w/ MR 1

    Displacement, s (mm)

  • Kunzelstab Penetration Test

  • KPT

    NKPT(/20 .)

    NKPT(/20 .)

    , Qu (t/m2)( ) ( ) Qu ( )

    0-3 0-3 83-6 3-6 8-136-14 6-14 13-2914-27 14-21 29-4227-55 21-35 42-69

    55 35 69

  • KPT

    NKPT :NKPT = NKPT NKPT < 15

    NKPT = 15 + 0.5 x (NKPT - 15) NKPT 15(EGAT, 1980)

    Qu (kN/m2) = 19.2 x (NKPT + 0.954) (EGAT, 1980)

    Su = Qu/9 (Meyerhof, 1976)

    Pu,cal = 9SuAb (Das et al.,1985)

  • No.

    Pu,mea.(N)

    NKPT(blow/20 cm)

    Su(kN/m2)

    Pu,cal. (N)

    (%) (N) (blow/20 cm) (kN/m ) (N) (%)1 MR-SR 16,319 12 27.64 22,782 71.62 MR-SR 19 578 16 5 37 24 30 697 63 82 MR-SR 19,578 16.5 37.24 30,697 63.83 MR-SR 40,410 28 61.77 50,922 79.44 MR-1 8 207 13 29 77 12 271 66 94 MR-1 8,207 13 29.77 12,271 66.9

    = Pu,mea./Pu,cal. X 100 (%), ,

  • 3.5

    4.0m

    o

    u

    l

    d

    e

    d

    : = 70 %

    2 0

    2.5

    3.0

    d

    i

    s

    t

    u

    r

    b

    e

    d

    /

    S

    u

    ,

    r

    e

    m

    Laboratory unconfined

    2.812.50

    Sensitivity = 1/0.7 = 1.43 2.81

    1 0

    1.5

    2.0

    i

    v

    i

    t

    y

    =

    S

    u

    ,

    u

    n

    d

    Field vane shear test

    ycompression test

    1.11

    1.60

    0.0

    0.5

    1.0

    S

    e

    n

    s

    i

    t

    0 10 20 30 40 50 60 70 80Time, t (day)

    2542

    , 2542

  • KPT

    NKPT(/20 )

    NKPT(/20 )

    , Qu (kN)(/20 .) (/20 .) uMR-SR MR-1

    0-3 0-3 4.9 2.43-6 3-6 4.9 - 8.6 2.4 - 4.36-14 6-14 8.6 - 18.4 4.3 - 9.214-27 14-21 18.4 - 27.0 9.2 - 13.527-55 21-35 27.0 - 44.3 13.5 - 22.1

    55 35 44.3 22.1

    : = 70 %

  • Manta Ray Guy Anchor . . 4 Kunzelstab Penetration Test

    Kunzelstab Penetration Test 70

    Manta Ray Guy Anchor .