The dynamic steel pipe installation method with GRUNDORAM horizontal rammers enables the economic installation of casing or product pipes up to 4000 mm diameter in soil classes 1-5 (partly even soil class 6 – easily soluble rock) underneath roads, railway tracks and rivers over lengths up to 100 m.

Target precision is achieved because the dynamic impact punches through the ground, destroying obstacles so they don’t need to be displaced in one piece and pushed ahead. For this purpose, the GRUNDORAM is connected to the pipe to be driven in a shear-resistant manner via a slip-on cone and aligned axially behind the pipe with the help of a lifting cushion. The piston hits the head of the one-piece housing of the pile driver. The resulting impact energy is transferred directly to the jacking pipe via the slip-on cone, which is driven through the soil blow by blow.

The soil is collected in the steel pipe, which is open at the front, and can be partially discharged during driving by means of a discharge adapter or cone. Finally, the soil is pushed out of the pipe into the target pit with the help of compressed air and/or water. Alternatively, it can be drilled out, flushed out or excavated. One of the many advantages of the TRACTO pile drivers is that there is no need for a press bearing during pipe jacking with GRUNDORAM, which saves a lot of time during set-up. And with the mini machines, this is also possible when space is at a premium.