The MIP process
Prior to execution
In preliminary suitability tests, the binding agent sus-
pension mix and the optimum quantity of it are deter-
mined on the basis of soil and groundwater samples
taken from the site.
The key production parameters, such as suspension
flow rate, auger speed and penetration depth, are con-
tinuously monitored by the rig operator, recorded by a
data acquisition program and documented as required.
Reference samples are additionally taken at regular
intervals from the fresh trench. They are used to monitor
the specified properties of the fresh suspension and of
the hardened MIP compound according to a predeter-
mined test program.
To ensure that a solid, seamless wall is produced,
MIP walls are constructed by the double pilgrim step
method. This patented production sequence is
characterized by additional working of the overlap
zones comprising primary and secondary cuts.
Thus the triple auger penetrates and mixes each wall
element at least two times.
"Double pilgrim step" production sequence: