Impact Ramming
THIS TECHNIQUE ENABLES INSTALLATION OF OPEN STEEL PIPES WITH THE USE OF SPECIAL PNEUMATIC RAMMING MACHINES WHICH APPLY IMPULSIVE STRESS.
When propulsion begins, the pneumatic ram is sited at the back end of the excavation and is self-supported by stretchers that connect it to the pipe.
No hydraulic jacks or any structure providing a reaction to them are required.
During drilling spoil accumulates in the pipe, from which it is removed at the end of the installation by water flush, compressed air or auger.
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