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A timber pile of length 8m and diameter of 0.2m is driven with a 20 kN drop hammer, falling freely from a height of 1.5m. The total penetration of the pile in the last 5 blows is 40 mm. Use the engineering news record expression. Assume a factor of safety of 6 and empirical factor (allowing reducing in the theoretical set, due to energy losses) of 2.5 cm. The safe load carrying capacity of the pile (in kN, round off to 2 decimal places) is ______
Correct answer is '151.515'. Can you explain this answer?
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Verified Answer
A timber pile of length 8m and diameter of 0.2m is driven with a 20 kN...
Engineering news record expression
s = Penetration of pile per hammer blow.
C = 2.5 cm = 0.025 m
then safe load carrying capacity
s = Penetration of pile per hammer blow.
C = 2.5 cm = 0.025 m
then safe load carrying capacity
Most Upvoted Answer
A timber pile of length 8m and diameter of 0.2m is driven with a 20 kN...
Given data:
Length of timber pile (L) = 8m
Diameter of timber pile (D) = 0.2m
Drop hammer weight (W) = 20 kN
Height of fall (H) = 1.5m
Total penetration in last 5 blows (P) = 40 mm
Factor of Safety (FOS) and Empirical Factor:
Factor of Safety (FOS) = 6
Empirical Factor = 2.5 cm
Calculating Energy:
The energy of the hammer can be calculated using the formula:
E = W * H
Substituting the given values:
E = 20 kN * 1.5m = 30 kNm
Calculating Energy Loss:
The energy loss due to friction and other factors can be calculated using the empirical factor:
Energy Loss = Empirical Factor * P
Substituting the given values:
Energy Loss = 2.5 cm * 40 mm = 1 kNm
Calculating Theoretical Set:
The theoretical set (S) is the penetration of the pile for each blow. It can be calculated using the formula:
S = (E - Energy Loss) / (FOS * L)
Substituting the given values:
S = (30 kNm - 1 kNm) / (6 * 8m) = 4 kNm / 48 m = 0.083 kNm/m
Calculating Safe Load Carrying Capacity:
The safe load carrying capacity (Q) can be calculated using the formula:
Q = 2 * π * D * S
Substituting the given values:
Q = 2 * π * 0.2m * 0.083 kNm/m = 0.33 kN
Calculating Corrected Safe Load Carrying Capacity:
The corrected safe load carrying capacity is calculated by dividing the safe load carrying capacity by the empirical factor:
Corrected Q = Q / Empirical Factor
Substituting the given values:
Corrected Q = 0.33 kN / 2.5 cm = 0.33 kN / 0.025 m = 13.2 kN
Calculating Final Safe Load Carrying Capacity:
The final safe load carrying capacity is calculated by multiplying the corrected safe load carrying capacity by the factor of safety:
Final Q = Corrected Q * FOS
Substituting the given values:
Final Q = 13.2 kN * 6 = 79.2 kN
Rounding off the Answer:
Rounding off the final safe load carrying capacity to 2 decimal places:
Final Q = 79.2 kN = 79.20 kN ≈ 79.2 kN ≈ 79 kN
Conclusion:
The safe load carrying capacity of the pile is approximately 79 kN. However, the correct answer provided is 151.515 kN, which suggests that there may be additional information or calculations involved that are not provided in the given data.
Length of timber pile (L) = 8m
Diameter of timber pile (D) = 0.2m
Drop hammer weight (W) = 20 kN
Height of fall (H) = 1.5m
Total penetration in last 5 blows (P) = 40 mm
Factor of Safety (FOS) and Empirical Factor:
Factor of Safety (FOS) = 6
Empirical Factor = 2.5 cm
Calculating Energy:
The energy of the hammer can be calculated using the formula:
E = W * H
Substituting the given values:
E = 20 kN * 1.5m = 30 kNm
Calculating Energy Loss:
The energy loss due to friction and other factors can be calculated using the empirical factor:
Energy Loss = Empirical Factor * P
Substituting the given values:
Energy Loss = 2.5 cm * 40 mm = 1 kNm
Calculating Theoretical Set:
The theoretical set (S) is the penetration of the pile for each blow. It can be calculated using the formula:
S = (E - Energy Loss) / (FOS * L)
Substituting the given values:
S = (30 kNm - 1 kNm) / (6 * 8m) = 4 kNm / 48 m = 0.083 kNm/m
Calculating Safe Load Carrying Capacity:
The safe load carrying capacity (Q) can be calculated using the formula:
Q = 2 * π * D * S
Substituting the given values:
Q = 2 * π * 0.2m * 0.083 kNm/m = 0.33 kN
Calculating Corrected Safe Load Carrying Capacity:
The corrected safe load carrying capacity is calculated by dividing the safe load carrying capacity by the empirical factor:
Corrected Q = Q / Empirical Factor
Substituting the given values:
Corrected Q = 0.33 kN / 2.5 cm = 0.33 kN / 0.025 m = 13.2 kN
Calculating Final Safe Load Carrying Capacity:
The final safe load carrying capacity is calculated by multiplying the corrected safe load carrying capacity by the factor of safety:
Final Q = Corrected Q * FOS
Substituting the given values:
Final Q = 13.2 kN * 6 = 79.2 kN
Rounding off the Answer:
Rounding off the final safe load carrying capacity to 2 decimal places:
Final Q = 79.2 kN = 79.20 kN ≈ 79.2 kN ≈ 79 kN
Conclusion:
The safe load carrying capacity of the pile is approximately 79 kN. However, the correct answer provided is 151.515 kN, which suggests that there may be additional information or calculations involved that are not provided in the given data.
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A timber pile of length 8m and diameter of 0.2m is driven with a 20 kN drop hammer, falling freely from a height of 1.5m. The total penetration of the pile in the last 5 blows is 40 mm. Use the engineering news record expression. Assume a factor of safety of 6 and empirical factor (allowing reducing in the theoretical set, due to energy losses) of 2.5 cm. The safe load carrying capacity of the pile (in kN, round off to 2 decimal places) is ______Correct answer is '151.515'. Can you explain this answer?
Question Description
A timber pile of length 8m and diameter of 0.2m is driven with a 20 kN drop hammer, falling freely from a height of 1.5m. The total penetration of the pile in the last 5 blows is 40 mm. Use the engineering news record expression. Assume a factor of safety of 6 and empirical factor (allowing reducing in the theoretical set, due to energy losses) of 2.5 cm. The safe load carrying capacity of the pile (in kN, round off to 2 decimal places) is ______Correct answer is '151.515'. 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 timber pile of length 8m and diameter of 0.2m is driven with a 20 kN drop hammer, falling freely from a height of 1.5m. The total penetration of the pile in the last 5 blows is 40 mm. Use the engineering news record expression. Assume a factor of safety of 6 and empirical factor (allowing reducing in the theoretical set, due to energy losses) of 2.5 cm. The safe load carrying capacity of the pile (in kN, round off to 2 decimal places) is ______Correct answer is '151.515'. 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 timber pile of length 8m and diameter of 0.2m is driven with a 20 kN drop hammer, falling freely from a height of 1.5m. The total penetration of the pile in the last 5 blows is 40 mm. Use the engineering news record expression. Assume a factor of safety of 6 and empirical factor (allowing reducing in the theoretical set, due to energy losses) of 2.5 cm. The safe load carrying capacity of the pile (in kN, round off to 2 decimal places) is ______Correct answer is '151.515'. Can you explain this answer?.
A timber pile of length 8m and diameter of 0.2m is driven with a 20 kN drop hammer, falling freely from a height of 1.5m. The total penetration of the pile in the last 5 blows is 40 mm. Use the engineering news record expression. Assume a factor of safety of 6 and empirical factor (allowing reducing in the theoretical set, due to energy losses) of 2.5 cm. The safe load carrying capacity of the pile (in kN, round off to 2 decimal places) is ______Correct answer is '151.515'. 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 timber pile of length 8m and diameter of 0.2m is driven with a 20 kN drop hammer, falling freely from a height of 1.5m. The total penetration of the pile in the last 5 blows is 40 mm. Use the engineering news record expression. Assume a factor of safety of 6 and empirical factor (allowing reducing in the theoretical set, due to energy losses) of 2.5 cm. The safe load carrying capacity of the pile (in kN, round off to 2 decimal places) is ______Correct answer is '151.515'. 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 timber pile of length 8m and diameter of 0.2m is driven with a 20 kN drop hammer, falling freely from a height of 1.5m. The total penetration of the pile in the last 5 blows is 40 mm. Use the engineering news record expression. Assume a factor of safety of 6 and empirical factor (allowing reducing in the theoretical set, due to energy losses) of 2.5 cm. The safe load carrying capacity of the pile (in kN, round off to 2 decimal places) is ______Correct answer is '151.515'. Can you explain this answer?.
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A timber pile of length 8m and diameter of 0.2m is driven with a 20 kN drop hammer, falling freely from a height of 1.5m. The total penetration of the pile in the last 5 blows is 40 mm. Use the engineering news record expression. Assume a factor of safety of 6 and empirical factor (allowing reducing in the theoretical set, due to energy losses) of 2.5 cm. The safe load carrying capacity of the pile (in kN, round off to 2 decimal places) is ______Correct answer is '151.515'. Can you explain this answer?, a detailed solution for A timber pile of length 8m and diameter of 0.2m is driven with a 20 kN drop hammer, falling freely from a height of 1.5m. The total penetration of the pile in the last 5 blows is 40 mm. Use the engineering news record expression. Assume a factor of safety of 6 and empirical factor (allowing reducing in the theoretical set, due to energy losses) of 2.5 cm. The safe load carrying capacity of the pile (in kN, round off to 2 decimal places) is ______Correct answer is '151.515'. Can you explain this answer? has been provided alongside types of A timber pile of length 8m and diameter of 0.2m is driven with a 20 kN drop hammer, falling freely from a height of 1.5m. The total penetration of the pile in the last 5 blows is 40 mm. Use the engineering news record expression. Assume a factor of safety of 6 and empirical factor (allowing reducing in the theoretical set, due to energy losses) of 2.5 cm. The safe load carrying capacity of the pile (in kN, round off to 2 decimal places) is ______Correct answer is '151.515'. Can you explain this answer? theory, EduRev gives you an
ample number of questions to practice A timber pile of length 8m and diameter of 0.2m is driven with a 20 kN drop hammer, falling freely from a height of 1.5m. The total penetration of the pile in the last 5 blows is 40 mm. Use the engineering news record expression. Assume a factor of safety of 6 and empirical factor (allowing reducing in the theoretical set, due to energy losses) of 2.5 cm. The safe load carrying capacity of the pile (in kN, round off to 2 decimal places) is ______Correct answer is '151.515'. Can you explain this answer? tests, examples and also practice Civil Engineering (CE) tests.
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