(Müller Verpress Pfahl) was the first pile system, which used the
grouting process to reduce shaft resistance during pile installation,
and to increase shaft bearing capacity It consists of a steel H-profile
fitted with an enlarged steel shoe to which the a grouting tube is connected.
The H-profile is driven with a hammer or
a vibrator while concrete or grout is
injected to the driving shoe. The concrete enters the soil at the upper
end of the pile tip and forms a fluidized zone along the pile shaft. It
thereby reduces the shaft friction along the pile, as well as the driving
profile of the MV-pile can be either permanent or temporary. After reaching
the desired depth, in the case of a temporary casing, it is unlocked from
the tip. Concrete is injected to fill the void as the casing is extracted.