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ACCIONA Construction presents new laser-guided tunnel excavation system during Engineering Week

05/22/2017

 The device will be on display tomorrow in the marquee in front of the Museo Reina Sofía.

ACCIONA Construction is also exhibiting a tunnel boring machine at the Puerta de Alcalá during Engineering Week.

Laser guided system for conventional tunneling
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Tomorrow, as part of Civil Engineering Week in Madrid, ACCIONA Construction will present a new laser-guided system for constructing tunnels, which significantly improves the excavation process.

The presentation will take place from 11:00 am, during the demonstration session of new technologies and applications being held in the marquee next to the entrance to the Museo Reina Sofía. This activity is free and visitors will be able to learn about how the device designed and patented by ACCIONA Construction works.

This system improves tunnelling precision by more than 60%. Using a laser, it projects a continuous outline of the theoretical cutting section onto the tunnel face in real time, “drawing” the outline that the tunnel needs to follow at each point along its route. This significantly reduces cost overruns caused by construction errors in these types of infrastructures. 

Simple functionality

The benefits of using this new system include its ease of use. It is a lightweight (75kg) and small (100x45x55cm) piece of equipment, which is operated by the surveyors working on the project, who do not require any additional technical training. 

Once the precise location has been determined using a survey station, a computer calculates the tunnel’s section and projects it using a laser, taking into account the distance to the surface to be excavated.

The system is now fully operational, following a test period in real environments including the works of the Metro de Chile, and is being used to excavate the Olesa tunnel that forms part of Barcelona’s new ring road, the B-40 highway.

Madrid Civil Engineering Week

The 4th edition of Madrid Civil Engineering Week, organised by the Association of Civil Engineers, seeks to raise awareness among the general public of the importance and complexity of the work carried out by engineers in constructing essential infrastructures for our everyday lives.

Numerous conferences and activities, visits to landmark buildings and an exhibition of remarkable pieces of machinery will take place across the city from 22 to 28 May. As part of this initiative, ACCIONA is exhibiting a 185-ton, 15-metre “Robbins 182-129” tunnel boring machine used for drilling water tunnels, at the Puerta de Alcalá in the city centre. 

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