Sheeting technology
Our vibration piling is currently equipped only with resonance-free start-up and
run-out so that it can also be used in oscillation-sensitive building grounds and
construction conditions without any losses. If necessary, stress release drilling
is conducted with a CFA /continuous flight auger). Depending on the soil type, the
sheet groove is pressed during extraction of the sheet piles in order to prevent
retroactive settlement.
For round or elliptical pits, the shotcrete method of construction has stood the
test. Considerable advantages of this method include the absolute vibration and
settlement-free positioning of the sheeting as well as the possibility of leaving
out or including supply lines or other objects which protrude into the pit.
We have used linear sheeting since 1996, primarily in municipal sewer construction
with depths of up to approx. 6.0 m. The difference to traditional slide bar sheeting
is that the steel sheeting plates or piling chambers can be lowered without constraints.
Thus the otherwise nearly unavoidable settlement near the building pits is almost
ruled out. In underground construction the sheeting can be used as an outer formwork
so that an external work room will not be required.
We manufacture pumping stations and shaft and chamber constructions economically,
often in the caisson method of construction. The structural shells - formed and
concreted either on site or put together from finished parts - are initially manufactured
without bottom slab. In order to facilitate better gliding a cutting edge is shaped
on the end of the caisson. Then we lift the bottom plate out - under water if necessary,
thereupon the pumping station, the shaft, or the chamber construction can be lowered
into the building ground.
After reaching the target depth the bottom plate is concreted. If the construction
is in groundwater, a concrete seal for the groundwater must be inserted underwater
beforehand.