chp 3 Flashcards
1
Q
types of piles
A
- displacement piles
- replacement piles
2
Q
types of displacement piles
A
- bakau pile
- precast concrete pile
- pre-stressed concrete pile
3
Q
advantage of displacement piles
A
quality and workmanship of piles can be controlled
4
Q
disadvantages of displacement piles
A
- difficulty in transporting full length of pile especially through congested streets
- driving process generates unacceptable noise and vibration
- difficult to manoeuvre long piles around urban area
5
Q
types of replacement piles
A
- percussion bored pile
- rotary bored pile
- micropile
6
Q
advantages of replacement piles
A
- strata of soil can be explored and examined before construction
- no difficulty in transporting
- lesser noise and vibration level
7
Q
disadvantage of replacement piles
A
they are cast-in-situ ; more difficult to construct and control
8
Q
factors determining the choice of piles
A
- loading
- soil condition
- differential statement
9
Q
equipment for displacement piles construction
A
- percussion
- vibratory
- hydraulic
10
Q
equipment for replacement piles construction
A
- kelly bar
- turntable
- auger
11
Q
reasons for pile load testing
A
- to obtain back-figured soil data that will enable other piles to be designed
- to verify structural soundness of the pile
- to counter-check results from geotechnical and pile driving formulae
12
Q
methods of pile testing
A
- constant rate of penetration
- maintained increment load test
