SOILMEC SM-5E A new “Electrically” powered version for tunnel job

Soilmec SM-5E Electrically Tunneling Machine

Trevi has used the new Soilmec SM-5E "electric" version for Mirti square, the new underground station in Rome. The job consisted of radial consolidation drilling in a pre-existing tunnel, in a very confined space, with presence of heavy water leakage and without the output of exhaust emissions. The Soilmec SM-5E multipurpose drilling rig is the result of the collaboration between Soilmec technological research and the Trevi Group, who brought their jobsite experience to the Soilmec designers.

The new rig derived directly from the SM-5 has the same main features just the power source an ABB electric engine has been changed. It is in compliance with the emissions standard (Tier III stage A and B) and develops a maximum rated power of 75 kW.

Soilmec SM-5E Electrically Tunneling Machine

As with the SM-5 fitted with diesel engine, the SM-5E has been designed for works to be performed in restricted spaces. Versatility is the key concept that has conditioned this rig design. In fact, thanks to its optimized mast articulation and the large range of rotary heads, it covers a broad application field: anchoring and tie- backs, micro-piles, jet grouting (fitted with special extension), coring, water well as well as tunneling and radial soil consolidation.

Soilmec SM-5E Electrically Tunneling Machine

Such versatility derives from the following features.
•    Rotary heads: with torque ranging from 687 to 972 daNm and 98 to 862 rpm max. drilling speed.
•    Three mast lengths with 1,400,1,900 and 2,400 mm feed/hoist strokes, making the rig use possible in low head room conditions.
•    New kinematism including two slew rings: one horizontal located on lower frame to allow drilling over the crawler by rotation +/- 90° in respect to rig longitudinal axis; the second located on the back of the mast secures +/- 180°rotation for radial drilling.
•    Smart and compact design.
•    Ease of transport and fast rig set up.
In addition, for operator comfort and safety the SM-5 offers the choice between hydraulic and radio remote control board completed with numerous safety devices, while for maintenance, the bonnets allows easy accessibility. The SM5, because of its compactness, unique mast movements, small dimensions and large range of rotaries, the rig is one of the best in its category.