2.4. Recommendations for Stiff Cohesive Soil

Try these first

1. 1.

   What is the preferred hammer type for concrete piles?

   Hint

   Think about reducing stress on the concrete material.

2. 2.

   How is soil classified based on blow counts?

   Hint

   Recall the Standard Penetration Test.

3. 3.

   What type of hammer is recommended for driving concrete piles in stiff soils?

   • Drop Hammer
   • Single-Acting Hammer
   • Double-Acting Hammer

   Hint

   Consider hammers that minimize stress.

4. 4.

   True or False: Double-acting hammers are suitable for all pile types regardless of soil.

   • True
   • False

   Hint

   Think about how pile material and soil conditions affect the choice.

5. 5.

   You are faced with driving a concrete pile into stiff cohesive soil that has a blow count of 30. Discuss the rationale behind your hammer choice and expected challenges.

   Hint

   Consider both energy levels needed and the properties of concrete.

6. 6.

   Analyze how different blow counts affect your hammer selection when dealing with non-cohesive soils and justify your choices.

   Hint

   Refer to the relationships between soil density and resistance.