HOME WHO WE ARE DESIGN CONSTRUCTION SUPERVISION MONITORING WORK WITH US Installations Musinet Engineering SpA boasts a know-how of particular importance in the design and construction of plants and systems, especially those for road and tunnel safety; in this sector, its projects show the ability to offer a service aimed not only at providing a high-tech project, capable of fully responding to the specific needs of the client, but also at facilitating its concrete implementation and management. The Mont Blanc, Tauri and Gotthard accidents have reopened the debate on the safety of tunnels at an international level, introducing a clear acceleration in the pursuit of all those measures aimed at preventing the repetition of events with comparable consequences; therefore the demand for high safety standards for the transport routes and the means that travel along them is increasingly widespread and growing. Therefore, many motorway companies have thus found themselves reviewing the plant and infrastructural equipment of these works in order to improve safety; therefore there has been a strong demand for new technologies designed to ensure the improvement of the safety of those who travel and of goods moving along the road networks. In this regard, Musinet Engineering SpA has developed and implemented, with a view to making infrastructures and vehicles communicate in an "intelligent" way, several projects aimed at improving the safety conditions of tunnels. An example is the renovation of all the safety systems and systems in the tunnels of the A32, in particular the Prapontin (4500 meters long) and the Serre la Voute (1500 meters). The new fall fire extinguishing system is unique in its kind, and operates without the aid of generators, pumps and other weak elements often present in this type of systems; these systems have been built with three fundamental criteria: construction of an underground hydraulic network along the two archways with various interconnections and partializations in order to obviate the problems of freezing and pressure drop; construction of a series of boxes (every 250 meters) inside the face of the tunnel, where the systems, fire extinguishers, hydrants and SOS columns were concentrated; construction of a gravity storage tank that would make the operation of the fire-fighting system independent of electric pumps. The lighting system is designed according to the recent UNI 11095 standard. The essential points consist of an internal subdivision of the tunnel zones and precisely: Entry and transition areas - The visibility of the driver of a motor vehicle must be ensured, at a distance sufficient to allow the driver to eventually stop his vehicle, of the reference obstacle. The potentially most dangerous position of the obstacle is the tunnel threshold, as the driver has difficulty in identifying it as his eye is adapted to the level of external luminance, which is much higher than that generated by the lighting system. Therefore the lighting system must ensure in said area a luminance proportional to the veil luminance, evaluated at the stopping distance from the tunnel entrance. L' Internal zone - The luminance of the internal zone, in which the adaptation of the eye makes it possible to detect the possible presence of the obstacle mentioned above, must above all ensure good driving comfort for the safety of traffic. Lamps - Super long-lasting high-pressure sodium vapor lamps have been adopted, over 20,000 hours if powered with stabilizer (reduction of maintenance costs) and of high efficiency and ease of partialization (reduction of operating costs): lighting systems equipped with these lamps have the highest overall efficiency. Lighting devices - The system includes bodies in extruded aluminum, to ensure greater strength and resistance, with front opening to facilitate the replacement of lamps and electrical auxiliaries on board in a special compartment. Arrangement of the luminaires - The luminaires are installed in rows in the middle of the lane to create an optical guide for the driver. Partialisation of the circuits - Using electronic devices for the regulation of lighting levels, it is possible to reduce the luminous flux up to 20% of the nominal one, and therefore it is possible to reduce the number of circuits compared to a step regulation (reducing the costs of realization) The signage for the channeling of traffic in the arches based on arrow / cross / exchange led traffic lights controlled locally and remotely from the Centralized Control Station. The closing portals of the by-pass between the two tunnel pipes are designed with the simple but at the same time innovative butterfly opening, to meet the needs of simplicity of use and reliability in sealing against cold and hot fumes, durability and practicality of management. These gates, made in the by-pass between the two tunnel pipes, consist of a metal infill with a driveway door to seal cold and hot fumes by means of special gaskets and two pedestrian butterfly doors. This "butterfly" solution was introduced to allow for a thrust on the opening stop practically equal to the frictional force of the door, since the two symmetrical surfaces compensate for the overpressure thrust between the two arches. Musinet Engineering si è occupata inoltre dei sistemi di ventilazione quali: Ventilazione longitudinale delle gallerie della A32: è stata prevista l'installazione di acceleratori reversibili con funzionamento a 400 °C per 120 minuti, cavi e canaline resistenti al fuoco, quadri elettrici di gestione e comando, adeguamento dei PLC e del sistema SCADA autostradale completo di algoritmi di ventilazione. Ventilazione forzata dei rifugi del T4 Traforo del Frejus: tale sistema di ventilazione forzata è costituito da una serie di ventilatori che prelevano l'aria dalle centrali di ventilazione e, tramite i canali coibentati installati nella condotta AF, immettono l'aria nei luoghi sicuri in modo da avere una sovrappressione rispetto alla canna principale. All rights reserved - Musinet Engineering SpA - Corso Svizzera 185 - 10149 Turin - Tel. 011.5712411 Fax 011.5712426 - e-mail: info@musinet.it Pec: musinet@legalmail.it - VAT number 08015410015 - Share capital € 520.000 iv - Tax Code and Company Reg. TO08015410015 - REA Turin 939200 PRIVACY POLICY & COOKIE