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    Padfoot

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    fazila fauzi
    The 200ft tower foundation design includes: 1) A concrete foundation with a base width of 2000mm, base height of 750mm, and stump size and height of 750mm/150mm above ground and 2500mm below ground. 2) Calculations show the foundation can withstand the tower's maximum uplift of 61.936kN, with a factor of safety of 4.09888837. 3) Reinforcement of the concrete shaft includes 25mm rebar arranged in 8 bars around the perimeter, with minimum lap length of 375mm and lateral ties of 6.25mm diameter.

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    Padfoot

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    fazila fauzi
    34 views3 pages
    The 200ft tower foundation design includes: 1) A concrete foundation with a base width of 2000mm, base height of 750mm, and stump size and height of 750mm/150mm above ground and 2500mm below ground. 2) Calculations show the foundation can withstand the tower's maximum uplift of 61.936kN, with a factor of safety of 4.09888837. 3) Reinforcement of the concrete shaft includes 25mm rebar arranged in 8 bars around the perimeter, with minimum lap length of 375mm and lateral ties of 6.25mm diameter.

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    The 200ft tower foundation design includes: 1) A concrete foundation with a base width of 2000mm, base height of 750mm, and stump size and height of 750mm/150mm above ground and 2500mm below ground. 2) Calculations show the foundation can withstand the tower's maximum uplift of 61.936kN, with a factor of safety of 4.09888837. 3) Reinforcement of the concrete shaft includes 25mm rebar arranged in 8 bars around the perimeter, with minimum lap length of 375mm and lateral ties of 6.25mm diameter.

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    34 views3 pages

    Padfoot

    Uploaded by

    fazila fauzi
    The 200ft tower foundation design includes: 1) A concrete foundation with a base width of 2000mm, base height of 750mm, and stump size and height of 750mm/150mm above ground and 2500mm below ground. 2) Calculations show the foundation can withstand the tower's maximum uplift of 61.936kN, with a factor of safety of 4.09888837. 3) Reinforcement of the concrete shaft includes 25mm rebar arranged in 8 bars around the perimeter, with minimum lap length of 375mm and lateral ties of 6.25mm diameter.

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    of 3

    STABILITY ANALYSIS FOR 200FT TOWER

    TECHNICAL DATA
    Max Compression 158.973 kN
    Max Uplift 61.936 kN
    Max Shear 17.608 kN
    No Of Legs 3 nos

    DESIGN DATA
    Safe Bearing Capacity 100 kN/m2
    Density Of Concrete 24 kN/m3
    Density Of Soil 17 kN/m3

    FOUNDATION PROFILE
    Base width 2000 mm
    Base height 750 mm
    Stump size 750 mm
    Stump height
    - above ground 150 mm
    - below ground 2500 mm

    Foundation Weight
    Concrete VOLUME(m3) DENSITY(kN/m3) WEIGHT(kN)
    - Base 3 24 72
    - Stump 1.40625 24 33.75
    - Stump above ground 0.084375 24 2.025

    Sub - Total 4.490625 107.775

    Soil
    - Soil above base 8.59375 17 146.0938

    Total 13.084375 253.8688

    CHECK FOR UPLIFT(SAFETY FACTOR)


    FOS 4.09888837

    DESIGN CALCULATION BASE ON BS 8110:Part 1 & Part 2


    fcu 25 N/mm2
    fy 410 N/mm2
    Cover 40 mm
    Assuming bar size 25 mm
    d 697.5 mm
    Design Of Shaft
    Design for compression and bending
    Ultimate moment at shaft due to shear force 46.6612 kN-m
    d/h 0.93
    M/bh2 0.110604 N/mm2
    N/bh 0.282619 N/mm2
    Refer Chart No: 24
    100ASC/bh 0.4 %
    ASC 2250 mm2

    PROVIDE Y 25 - 8 nos

    3.12.8.11 Lap Length


    Minimum lap length 375 mm

    3.12.7.1 Lateral Ties


    Min diameter of ties 6.25 mm

    PROVIDE

    Pad Design
    Assume bearing capacity 100 kN/mm2
    Bending moment developed/meter length 78.125 kNm length
    Consider the pad as a beam of width 1 meter & depth 0.6 meter
    K 0.00642335
    compression reinforcement is/not required

    Area of tension reinforcement required


    z 662.625

    As req 330.536256 mm2/m length


    Table 3.27 As min 906.75 mm2/m length

    PROVIDE

    Anchorage length of bolts


    Diameter of anchor bolt 32 mm
    Number 4 nos
    Force 61.936 kN
    Force carried by each bolt 15.484 kN/bolt

    3.12.8.3 Ultimate bond stress 2 N/mm2


    Anchor length 77.05016 mm
    PROVIDE

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