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4.2. Foundation
Pile-driving
(ramming)
depth
Inclination
(East-West)
Inclination
(North-South)
+ 100 mm
+ 3°
+ 3°
Twist
Height diff erences of
the foundations posts
within one row
+ 30 mm
+ 5°
4.2.1. Ramming (pile-driving) tolerances
4.2.2. Pile-driving obstacles and concreting
Pile-driving operations must be undertaken by specialist companies. Special pile-driving plans are created on the basis of a
digital terrain model with exactly specifi ed contour lines. These plans must be available at least one week before the start of
the pile-driving operations and must include the positions of the foundation posts and their corresponding dimensions. The
position of the fi rst and last pile in each row must be marked on the terrain with a wooden stake. If a row length exceeds 50
meters, additional markings (wooden stakes) must be used within the row.
Extraordinary foundation posts must be clearly identifi ed and documented in a pile-driving plan. Inconsistencies during
the pile-driving procedure which could aff ect the adhesive force of the piles must be documented, (e.g. slant position,
deceleration and subsequent, sudden acceleration of the penetration speed, swift penetration of the foundation pile while
pile-driving etc.). All pile-driving procedures deviating from the specifi cations as to the ramming of the foundation posts
must be approved by Schletter GmbH.
If pile-driving operations are impeded by unexpected obstacles (blocks, solid rock on the site), the following procedure must
be implemented:
1. Pre-drill down to the intended target depth.
2. If possible, vacuum the drill cuttings out of the borehole. Otherwise, the drill cuttings that remain in the borehole have
to be compacted.
3. The borehole must be fi lled in layers with compressed concrete of strength C16/20 and compacted.
4. After that, ram (pile-drive) the pile without delay.
Fig 4.2.1.-1 (pile-driving tolerances - depth)
Fig 4.2.1.-2 (pile-driving tolerances - E/W tilt)
Fig 4.2.1.-3 (pile-driving tolerances - N/S tilt)
Fig 4.2.1.-4 (pile-driving tolerances - twist / distortion)
Fig 4.2.1.-5 (pile-driving tolerances - diff erence in height)
Schletter Solar GmbH – Alustraße 1 – 83527 Kirchdorf
Mounting instruction
FS UNO
with SRF Foundation Posts
| 2016.09 V.00
4
