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A 12 long reinforced concrete pile of diameter 450 mm was driven by drop hammer having total mass of 24000 kg and having an effective fall of 0.9 cm. The average penetration for the last five blows was recorded as 0.6 cm per blow. If the total elastic compression is 2.3 cm, then the safe load on the pile will be _____ kN.
Assume coefficient of restitution and factor of safety to be 0.30 and 2 respectively. Use Hiley’s formula.
Take γconcrete = 25 kN/m3. Efficiency of hammer (ηn) = 1.0.
    Correct answer is between '50.5,52'. Can you explain this answer?
    Verified Answer
    A 12 long reinforced concrete pile of diameter 450 mm was driven by dr...
    Concept:
    By Hiley’s formula
    Ultimate load carrying capacity of the pile is given by:
    Where,
    η= efficiency of hammer = 1.0 (drop hammer)
    ηb = efficiency of hammer blow =
    e = coefficient of restitution
    p = weight of pile
    w = weight of hammer
    c = constant (elastic compression between pile and soil)
    s = set (penetration of pile per blow of hammer)
    h = height of fall
    calculation:
    W = 24000 × 9.81 = 235.44 kN
    ep = 0.30 × 47.71 = 14.31 kN
    w > ep
    ηh = 1.0
    s = 0.6 cm| blow
    c = 2.3 cm
    Qup = 102.44 kN
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    A 12 long reinforced concrete pile of diameter 450 mm was driven by drop hammer having total mass of 24000 kg and having an effective fall of 0.9 cm. The average penetration for the last five blows was recorded as 0.6 cm per blow. If the total elastic compression is 2.3 cm, then the safe load on the pile will be _____ kN.Assume coefficient of restitution and factor of safety to be 0.30 and 2 respectively. Use Hiley’s formula.Take γconcrete= 25 kN/m3. Efficiency of hammer (ηn) = 1.0.Correct answer is between '50.5,52'. Can you explain this answer?
    Question Description
    A 12 long reinforced concrete pile of diameter 450 mm was driven by drop hammer having total mass of 24000 kg and having an effective fall of 0.9 cm. The average penetration for the last five blows was recorded as 0.6 cm per blow. If the total elastic compression is 2.3 cm, then the safe load on the pile will be _____ kN.Assume coefficient of restitution and factor of safety to be 0.30 and 2 respectively. Use Hiley’s formula.Take γconcrete= 25 kN/m3. Efficiency of hammer (ηn) = 1.0.Correct answer is between '50.5,52'. Can you explain this answer? for Civil Engineering (CE) 2024 is part of Civil Engineering (CE) preparation. The Question and answers have been prepared according to the Civil Engineering (CE) exam syllabus. Information about A 12 long reinforced concrete pile of diameter 450 mm was driven by drop hammer having total mass of 24000 kg and having an effective fall of 0.9 cm. The average penetration for the last five blows was recorded as 0.6 cm per blow. If the total elastic compression is 2.3 cm, then the safe load on the pile will be _____ kN.Assume coefficient of restitution and factor of safety to be 0.30 and 2 respectively. Use Hiley’s formula.Take γconcrete= 25 kN/m3. Efficiency of hammer (ηn) = 1.0.Correct answer is between '50.5,52'. Can you explain this answer? covers all topics & solutions for Civil Engineering (CE) 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for A 12 long reinforced concrete pile of diameter 450 mm was driven by drop hammer having total mass of 24000 kg and having an effective fall of 0.9 cm. The average penetration for the last five blows was recorded as 0.6 cm per blow. If the total elastic compression is 2.3 cm, then the safe load on the pile will be _____ kN.Assume coefficient of restitution and factor of safety to be 0.30 and 2 respectively. Use Hiley’s formula.Take γconcrete= 25 kN/m3. Efficiency of hammer (ηn) = 1.0.Correct answer is between '50.5,52'. Can you explain this answer?.
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