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THE NEW GENERATION

The pneumatically driven hammers work according to the soil displacement method. When moving forward the spoil is displaced into the surrounding soil. That way a channel is produced into which short pipes with smooth sockets or long pipes made of plastic (PE, PVC or PE-X) up to OD 160 or cables are pulled in. Depending on the type of soil, lengths up to 25 m can either be pulled in directly or later on. For operation, a compressor with 6–7 bar operating pressure is required.

For more than five decades, the GRUNDOMAT soil displacement hammers stand for on-target underground pipe installation. Their high target accuracy is due to the 2-stroke principle. With this proven concept, the piston initially strikes the chisel, which advances in order to produce the bore hole and to destroy any obstacles along the way. The casing is impacted with the second stroke and pulled in with the pipe attached. That way peak resistance and casing friction are separated and alternately easier to overcome. This makes the GRUNDOMAT work dead on target even in stony grounds. The optimised design of the new GRUNDOMAT generation convinces with new technical solutions that further improve durability and minimise time and service effort. The soil displacement hammer's broad range of applications is also retained, new options such as the servo control for small machine sizes simplify handling.

APPLICATION RANGE

  • Property service connections
  • Undercrossings

SPECIAL APPLICATIONS

  • Pipe ramming (from type 130 on)
  • Dynamic pipe renewal (from type 95 on)
  • Extraction of steel pipes
  • Pile foundations

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