BA.GB.12-27409-05-07-FTA-jr
5.3.1.2 Subsoil of stabilizing jacks
Danger!
When the jacks become less effective, e.g. if one jack
sinks into the ground, a danger of tilting occurs! As-
phalt and concrete plates can be underflowed. Under-
neath the asphalt and the concrete plates respectively
there can be canals.
Avoid jacking:
on drain covers, grids,
on canal systems, cable ducts and pipework,
within the area of kerbstones, so that the jack
plates do not lay on completely,
on floating sand,
on filled-up soil,
etc..
The subsoil must be even. If necessary make an even area. The hinged
feet level out slight unevenness of the ground, but they do not serve for
levelling out of inclinations in a slope.
example
The jacks must be freely moveable during positioning procedure. You must
check, whether the subsoil withstands the maximum load occurring under
the jack plates of the stabilizing jacks. The supporting forces are indicated
at each stabilizing jack.
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