Microtunneling

Microtunneling

THIS TECHNIQUE USES A REMOTE-CONTROLLED GUIDED MICROTUNNEL BORING MACHINE (MTBM) TO LAY UNDERGROUND RIGID PIPELINES.

Microtunneling combines a pipe jacking technique with a remote-controlled boring or shield machine. The thrusting force is distributed by hydraulic jacks located in the MTBM front section and operated by a thrust ring.

Microtunneling can be used for underground pipe installation in any kind of geological conditions, even below groundwater, by means of a controlled-thrust, line and grade tolerance guaranteed system.

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H.D.D. / Horizontal Directional Drilling

H.D.D. / Horizontal Directional Drilling

TECHNICAL FEATURES

– steerable boring technique;

– planimetric and altimetric accuracy of the drilling path;

– use of flexible pipes (steel; HDPE cables or cable bundles);

– no driving or exit chambers.

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Pipe Jacking

Pipe Jacking

THIS TRENCHLESS TECHNIQUE IS USED TO INSTALL OPEN PIPELINES (STEEL, CONCRETE, GRES, PRFV, POLYCRETE) RANGING BETWEEN 100 mm AND 3000 mm IN DIAMETER. HYDRAULIC JACKS LOCATED AT THE TUNNEL ENTRY ARE USED TO PUSH IN SEQUENCED PIPE ELEMENTS TO FORM THE LINE.

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Impact Ramming

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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Auger Boring

Auger Boring

 

TECHNICAL FEATURES
non-steerable boring technique;
only straight path;
good planimetric and altimetric accuracy of the drilling

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