Installation Plant and Equipment
Grout Injection Shank with Grout Box
Used for installation of grouted piles. Piling mix concrete (with a max. aggregate size of 4 mm) is pumped through the pile as it is driven, ensuring that the annulus between the pile shaft and the ground is fully grouted.
Dry Driving Shank
Used for installation of end bearing piles. The dry driving shank is fitted into the excavator hammer, in place of the standard chisel. Piles are driven to a set and then filled with a concrete with 10 mm (3/8 in) aggregate.
Excavation and Hammer Data
| Pile type | Excavator Size | Hammer Type | Hammer Power | Hammer Blows | Hammer Length | Hammer Weight |
| [mm] / [in] | [tonnes] / [tons] | Krupp / Atlas Copco | [Joules] / [ft-lbs] | per minute | [m] / [ft] | [tonnes] / [tons] |
| 118 / 4.65 | 25 / 28 | HM 1000 / MB 1700 | 4020 / 2965 | 320-600 | 2.0 / 6.56 | 1.7 / 1.9 |
| 170 / 6.69 | 30 / 34 | HM 1500 / MB 2200 | 4950 / 3651 | 280-550 | 2.2 / 7.22 | 2.2 / 2.46 |
Notes:
- Excavators must have sufficient boom / jib height, to handle the hammer length plus the pipe section. Minimum jib heights: 118 pile = 24 ft, 170 Piles = 24.61'.
- Static pile test
Pile Testing
Both static and dynamic tests can be used to establish the ultimate bearing capacity of end-bearing and skin friction piles.
The static pile test provides comprehensive data in respect of the pile's performance. Kentledge or anchor piles are required to provide a reaction, against which the pile can be loaded.
Dynamic pile testing enables the pile to be tested more quickly, using wave equation, but requires special considerations in respect of ductile piles (re. lateral support at the head of the pile and sufficient contact area for the hammer).