Chapter 3 Flashcards
Types of displacement piles
- Bakau and tanalised pile
- Precast concrete pile
- Pre-stressed concrete pile
- Steel piles (H-section)
Types of replacement piles
- Percussion bored pile
- Rotary bored pile
- Micropile
Advantage of displacement piles
Quality and workmanship can be controlled
Disadvantages of displacement piles
- Difficulty in transporting the complete length of piles especially through congested streets
- Driving process generates unacceptable noise and vibration
- Difficult to manoeuvre the long piles around urban area
Advantages of replacement piles
- Strata of soil can be explored and examined before construction
- No difficulty in transporting
- Lesser noise and vibration level
Disadvantage of replacement piles
Replacement piles are cast-in-situ and therefore more difficult to construct and control
Factors determining the choice of piles
- Soil condition
- Loadings
- Differential statement
Equipment for driven piles construction
- Pile driver
- Percussion
- Vibratory
- Hydraulic
- The mandrel
Installation of sheet piles
Driving in panels
Advantages of franki driven Cast-in-situ piles
- Often a very economical system
- Extensive range of pile sizes
- Excellent load/deflection performance
Equipment for bored piles construction
- Kelly bar
- Turntable
- Auger
Members of pile frame
- Leader
- Sill
- Winch
Reasons of pile load testing
- To obtain back-figured soil data
- To confirm pile lengths
- To verify structural soundness of the pile
Methods of pile load testing
- Constant rate of penetration
- Maintained increment load test
Describe function of pile cap
Distributes load from the column to the piles
Where is contiguous bored pile used
Used in construction of basements or to form retaining walls
