20. Driving Stresses in Piles
The chapter discusses the importance of controlling driving stress in precast piles to prevent damage during installation. Key methods include using cushioning materials and selecting appropriate hammer weights and heights for optimal blow efficiency. Additionally, guidelines for determining safe loads on piles and selecting appropriate pile hammers based on various factors such as pile type, soil conditions, and project requirements are explored.
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4.3Pile Hammer Mechanics And Selection
This section discusses the mechanics of pile driving, the importance of...
What we have learnt
- Concrete piles are particularly vulnerable to damage during driving, necessitating protective measures.
- Cushioning materials, like timber, reduce impact stress on piles during installation.
- Safe load on piles can be determined using the engineering news formula, which factors in hammer weight and fall height.
Key Concepts
- -- Driving Stress
- The stress experienced by piles during the driving process, which must be controlled to prevent damage.
- -- Hammer Energy
- The energy applied through the hammer to drive the pile, which is a product of the hammer's weight and height of fall.
- -- Blow Efficiency
- The ratio of transmitted energy to input energy, influenced by hammer weight and velocity.
- -- Engineering News Formula
- A formula used to determine the safe load on a pile based on hammer energy and soil resistance.
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