1.4. Weight of Hammer Considerations

Try these first

1. 1.

   What is the purpose of cushioning materials in pile driving?

   Hint

   Think about why protecting concrete from stress is necessary.

2. 2.

   What factors may affect a hammer's effectiveness?

   Hint

   Consider how these elements relate to energy transfer in driving.

3. 3.

   What is the recommended thickness for cushioning material?

   • 5 cm
   • 10 cm
   • 20 cm

   Hint

   Recall the specified minimum from the section.

4. 4.

   True or False: Heavier hammers contribute to lower blow efficiency.

   • True
   • False

   Hint

   Think about the relationship between hammer weight and energy efficiency.

5. 5.

   If a pile requires a load support of 4000 lbs with soil resistance of 1000 plf and you are using a hammer weighing 2500 lbs, what is the height of fall necessary to meet this requirement?

   Hint

   Keep in mind to convert units appropriately where necessary.

6. 6.

   Discuss the implications of using a hammer suitable for light piles on heavy concrete ones.

   Hint

   Think about the types of stresses involved and what material limits each pile type has.