3.2. Impact of Pile Length on Blow Energy

Try these first

1. 1.

   What is the definition of blow energy?

   Hint

   Think about the forces involved in driving a pile.

2. 2.

   Name a type of hammer suitable for driving timber piles.

   Hint

   Consider the material type of the pile.

3. 3.

   Which hammer type is generally preferred for concrete piles?

   • Double acting hammer
   • Vibrating hammer
   • Single acting hammer

   Hint

   Recall the recommendations for hammer types based on material.

4. 4.

   True or False: Double acting hammers are suitable for driving concrete piles.

   • True
   • False

   Hint

   Consider the impact on concrete.

5. 5.

   You have a concrete pile needing to penetrate stiff clay. If the pile length increases from 10m to 15m, describe the impact on hammer selection and the required blow energy.

   Hint

   Think about how height and resistance interact with energy needs.

6. 6.

   Explain why vibratory hammers are not recommended for dense clay when driving sheets, despite being silent.

   Hint

   Consider how vibratory action interacts with sheer resistance.