|
Author:
Saleem
|
2004-06-05 |
|
| |
|
|
| |
What is the allowable Pile position tolerence in boring piles? If it is happened to be more than allowable limit what are the remedies to do in Pile cap?
Thank You all
|
|
| |
|
|
Follow-up:
| |
Author:
John Whitworth
|
2004-06-16 |
|
| |
|
|
| |
The normal pile positional tolerances in the UK are 75 mm on plan and 1 in 75 on verticality for vertical piles.
If the piles are installed as single piles or only in pairs, they will be effectively free headed in at least one direction and the pile reinforcement should take account of positional tolerances.
Once a normal three pile pile cap or greater is adopted, thge piles are effectively restrained in two direction. Under these circumstances the pile cap iteself will take out the positional moments in bending, leaving the pile tom cater for vertical load only. Thie means less reinforcement in the pile and is why most piling contractors will qualify that they expect the pile ca
|
|
| |
|
|
Follow-up:
| |
Author:
John Whitworth
|
2004-06-16 |
|
| |
|
|
| |
The normal pile positional tolerances in the UK are 75 mm on plan and 1 in 75 on verticality for vertical piles.
If the piles are installed as single piles or only in pairs, they will be effectively free headed in at least one direction and the pile reinforcement should take account of positional tolerances.
Once a normal three pile pile cap or greater is adopted, thge piles are effectively restrained in two direction. Under these circumstances the pile cap iteself will take out the positional moments in bending, leaving the pile tom cater for vertical load only. Thie means less reinforcement in the pile and is why most piling contractors will qualify that they expect the pile ca
|
|
| |
|
|
Follow-up:
| |
Author:
John Whitworth
|
2004-06-16 |
|
| |
|
|
| |
The normal pile positional tolerances in the UK are 75 mm on plan and 1 in 75 on verticality for vertical piles.
If the piles are installed as single piles or only in pairs, they will be effectively free headed in at least one direction and the pile reinforcement should take account of positional tolerances.
Once a normal three pile pile cap or greater is adopted, thge piles are effectively restrained in two direction. Under these circumstances the pile cap iteself will take out the positional moments in bending, leaving the pile tom cater for vertical load only. Thie means less reinforcement in the pile and is why most piling contractors will qualify that they expect the pile cap and/or ground beams to take out the position tolerance moments.
If a pile has been built out of position, the pile cap or ground beam will need to be adjusted to take the pile back into the sub-structure. This will involve additional ground beam/pile cap concrete and possibly reinforcement. Unless the pile is significantly out of position, it is unlikley that major re-design of the sub-structure will be necessary.
|
|
| |
|
|
Follow-up:
| |
Author:
DUPLAINE Hervé
|
2004-06-28 |
|
| |
|
|
| |
The tolerances are given in european norms ( for example ) EN 1536 for bored piles, EN 12699 for displacement piles.
The tolerance depends mainly on the pile diameter in EN 1536 : 0.10 m up to 1 m diameter, 0.1 x D between 1 and 1.5 m and 0.15 m above 1.5 m diameter. these tolerances are given at working platform level ( inclination shoud not exceed 0.02 m/m according to the same norm ).
If you forget about norms it is good sense to consider that tolerances should vary with the type of boring method : it will be more difficult to ensure a tight tolerance for a small diameter CFA pile than for a 1 m diameter pile with temporary casing. Piles drilled on land will be easier to position than piles drilled over water, etc.
|
|
| |
|
|
Return
to subject 'Piling'
|
Follow-ups:
|
Subject:
Pile Position Tolerence 