Consider the following statements regarding Pile Load Tests 1. An Initial Test is performed on a working pile to verify the design load. 2. A Routine Test is performed on a test pile to determine the ultimate load capacity. 3. The Cyclic Load Test is used to separate the skin friction and point bearing components of the pile capacity. Which of the statements given above is/are correct?
- A1 and 2 only
- B2 only
- C3 onlyCorrect
- D1, 2 and 3
Solution
Concept
Pile Load Tests
Formula
N/A
Step-by-step solution
1. Analyze the statements regarding Pile Load Tests: Initial Tests are performed on test piles, Routine Tests on working piles, and Cyclic Load Tests separate skin friction and point bearing. 2. Identify that Statements 1 and 2 are incorrect (their descriptions are swapped), while Statement 3 is correct. 3. Select Option (c) as the correct choice.
Explanation
Option C is correct because only statement 3 is true. The Cyclic Load Test separates the skin friction and point-bearing capacity of a pile by applying and releasing loads in cycles. Statement 1 is false because Initial Tests are performed on non-working test piles, not working piles. Statement 2 is false because Routine Tests are conducted on working piles to check design performance rather than determine ultimate capacity.
Shortcut
To remember Pile Load Tests, use these quick memory rules: - Initial = Test Pile: Conducted on a preliminary non-working test pile to determine ultimate load capacity. - Routine = Working Pile: Conducted routinely on working piles to verify safe working load. - Cyclic = Cycle & Separate: Load/unload cycles separate skin friction and point bearing resistance.
Common mistake
A common mistake is selecting option A by confusing the definitions of Initial Test and Routine Test. Students often swap the two, forgetting that an Initial Test is performed on a non-working test pile to determine ultimate load capacity, whereas a Routine Test is conducted on a working pile to check design performance.
Correct answer: C) 3 only