2. Guidelines from U.S. Army Corps of Engineers

Try these first

1. 1.

   What is the primary consideration when selecting a hammer for concrete piles?

   Hint

   Think about the material properties of concrete.

2. 2.

   Name the two main types of soil discussed in the guidelines.

   Hint

   These types are based on particle adhesion.

3. 3.

   What type of hammer should be used for concrete piles in loose soil?

   • Single-acting
   • Double-acting
   • Vibratory

   Hint

   Think about the conditions that allow for flexible hammer choices.

4. 4.

   True or False: Heavier hammers are generally recommended for non-cohesive soils.

   • True
   • False

   Hint

   Consider the type of energy needs based on soil types.

5. 5.

   A technician has a pile hammer that weighs 750 kg; if he drops it from a height of 2 meters, how much blow energy is generated? What considerations should be taken into account for its use?

   Hint

   Use the blow energy formula discussed earlier.

6. 6.

   You observe a construction site using double-acting hammers for concrete piles in medium dense soil. Discuss the potential consequences and provide an alternative recommendation.

   Hint

   Reflect on the soil types and hammer types discussed in relation to the material.