Plants

Constant temperature control for smooth tunnelling 

The cooling system supplies the TBM with water at a constant temperature, usually in closed circuits. During the advance, it cools heated components of the TBM via a heat exchanger and returns the heated water. Thanks to an evaporative cooler, the system always operates within the optimum temperature range. The insulated container minimizes temperature fluctuations and the 24 m³ water tank serves as buffer storage for extended pipelines. Pressure boosting systems compensate for pressure losses and provide a constant supply of cooling water. They can be controlled manually, automatically or directly from the TBM via Herrenknecht.Connected and allow full data acquisition.

The perfect grout for backfilling

Two-component grout is a binding agent ideal for backfilling the annular gap between the segment and the subsoil. It consists of water, bentonite and cement as well as retarder and accelerator additives. The right mixture is crucial for quality and durability. Mixing plants from Herrenknecht have won over customers worldwide with their performance, reliability and compact container design.

Compressed air for maximum safety

Compressed air plants supply the TBM with filtered compressed air. It is essential that enough air is always available for work under pressure on the cutting wheel, e.g. when checking and replacing the cutting tools. With the Mixshield and the Variable Density TBM, even sudden pressure and volume fluctuations can be compensated for very precisely thanks to tunnel face support via an automatically controlled air cushion.