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Facts and data on the test gallery Hagerbach in Flums

The first detonations took place around 30 years ago. The tunnel was built explicitly for trial purposes, and today consists of a number of tunnels, caverns, trial areas, laboratories, and training rooms over a stretch of around five kilometers. In addition to optimum conditions, such as constant atmospheric conditions (air, temperature), ventilation channels with adjustable wind speeds, excellent electro-magnetic shielding, and vibration-free sites on a firm rock base, there are no noise emissions, and there are pressure-resistant rooms (up to 12 bar), thus also resulting in ideal conditions for studies and tests in specialist areas other than tunnel building. Thus, for example, there are motor studies, fire trials, blast welding - all kinds of trials that are either not possible in other places or are possible only at great expense.

Companies (last updated: July 10, 2007)

Amberg Engineering AG, Chur, Regensdorf, Sargans, Brno, Singapore, Madrid Comprehensive engineering competence in underground construction Amberg Messtechnik AG, Regensdorf Measuring technique for underground Ausbildungszentrum des Schweizerischen Baumeisterverbandes, Sursee [Training Center of the Swiss Confederation of Builders] Training - Investment for the future Baumbach Metall GmbH & Co. KG, D-Effelder Steel fibers Bekaert (Schweiz) AG, Baden Jetcrete with Dramix steel fibers Bernold AG, Walenstadt Steel constructions, formwork, sheeting Bochumer Eisenhütte Heintzmann GmbH & Co. KG, D-Bochum Mining support, roof and ground control, roadway security and long wall technology Dräger (Schweiz) AG, Dietlikon Gas detection and breathing protection Ebo AG, 8833 Samstagern Cable trays, cable ladders, underground channels Fischer Rista AG, Reinach Prefabricated sheeting Fortatech AG, 9015 St. Gallen Fiber technology Gummischwarz AG Technical products for industry, construction, hospitals Häny & Cie. AG, Meilen Cement injection systems

HCB Siggenthal-Station High performance cement and concrete Hilti AG, Schaan/Principality of Liechtenstein Measuring/laser technology, drilling/chiseling/mounting/installation technology, diamond drilling, fire protection systems Isofer AG, Knonau Rock slide and avalanche protection, conveyor and belt protections, stoppers Mapei, Milan Tunneling Line BASF Construction Chemicals (Schweiz) AG, Zurich Modern jetcrete systems and underground products Memarco AG, P O Box 39, 4312 Magden Fireproof concrete additives MHC, Otelfingen Anchor and injection technology, tunnel lighting RUWA Drahtschweisswerk AG, Sumiswald Fibers, anchoring, reinforcements SAKRET SA, Solothurn Dry mortar, jetcrete Siemens Building Technologies AG Life safety and security systems Securiton AG, Zollikofen / Berne Alarm and security systems SIG, Neuhausen / SIG Bautechnik AG, Glattbrugg Underground construction technology Sika AG, Bauchemie, Zurich Construction chemicals Synthetic Industries NOVOCON, Chattanooga Tennessee, USA Steel and plastic fibers Trefil Arbed Bissen S.A., Luxembourg Steel fibers These companies use the tunnel essentially for research and development in below-ground work and for testing stone and construction materials (drilling, detonating, cementing, injecting, anchoring, sealing). In addition, the tunnel is a central laboratory for tunnel safety, that is for smoke detection systems, fire alarm systems, extinguishing systems, materials testing, training of rescue teams and firemen.

How many people work in the tunnel?

24 people, more when testing is taking place. Siemens has 2-3 people on site during tests.

What does Siemens test in the tunnel?

Siemens researches various fire scenarios and the effectiveness of protective measures under real-life conditions in tunnels (relation of 1:10)

Where is the tested Siemens technology used?

Road and railway tunnels Cable lines Conveyor belts (coal, lime, etc.) Concourses (station concourse Hamburg Central Train Station) Building exteriors (Graz Art Gallery) Power plants (nuclear power plants, coal power plants) Airports (baggage conveyors)

What is special about our technology?

Our security concept consists of four elements: Video surveillance, fire alarm, fire management, automatic extinguishing, and intervention by the fire department.

Fibro Laser technology

1. Where is the knowledge gained in Fibro Laser tests used?

In all large tunnel projects all over the world involving sealing, water channeling and ventilation, and fire prevention measures in the form of escape routes, emergency exits, fire alarm equipment and sprinklers.

2. What progress is to be expected in the next few years?

Today's technology allows fire prevention monitoring over a stretch of four kilometers. Longer stretches therefore require several Fibro Laser monitors. In the future, one Fibro Laser system will cover appreciably more than four kilometers of tunnel, and at the same time communication with the tunnel control unit will be improved.

3. How does Fibro Laser technology work?

The Fibro Laser system is a linear heat alarm system for detecting fires. With it, a tunnel is equipped with a sensor cable (light wave conductor). With the appropriate electronics and software, the sensor cable can be divided into sensor sections of a minimum of 10 meters. These sections can record the temperature and transmit it to a central fire reporting unit using defined alarm criteria. Measurement occurs in a defined cycle of seconds. If there is a spontaneous rise in temperature of a few degrees (the sensitivity is adjustable), an alarm goes off with information to the tunnel control unit on the size, course, and direction of spread of the fire.

4. What can the Fibro Laser technology prevent or improve?

An automated fire alarm system for tunnels must be capable of detecting the exact location of the source of the fire in a tunnel and assigning it to an alarm zone. In addition to exactly locating the fire and automatically setting off applicable protection systems (traffic lights, smoke extraction, extinguishing equipment), the system should provide the incident management team with information on fighting the fire (size, course, and

direction of spread of the fire). Location resolution of at least five meters is required whereby potential tunnel winds of up to 10 m/s must not impair detection. In addition, in a maximum of three minutes from the time of the fire breaking out, the alarm must be confirmed by the control unit so that timely intervention can take place. With wind speeds of 10 m/s, measurable factors such as smoke, gases, and "convective heat conduction" swirl around and reach their maximum values at places other than the source of the fire. Due to these conditions, conclusions on the fire and the location of the fire are imprecise. On the other hand, the Fibro Laser records both the values of the convection heat and of the radiant heat, thus allowing an exact assessment, even under turbulent wind conditions. The linear heat alarm with Fibro Laser is also suitable for the protection of important infrastructure installations in which energy, data or materials are transported (cable shafts, conveyor belts). Failure of such equipment may constitute not only an acute safety risk for the operator, but in case of fire almost always leads to an operational stoppage and thus usually to high consequential economic costs.

5. Fibro Laser technology supports automatic extinguishing systems

Automatic extinguishing systems in a tunnel check the fire immediately following setting-off of the alarm by the Fibro Laser system and prevent a rapid spread. The cooling of the fire gases in the vicinity of the source of the fire enables control of the fire and prevents both the emergence of a full-scale fire and its spread by fire jumping to neighboring vehicles. In this way it avoids greater damage to the tunnel infrastructure. Specially sized sprinkler systems with jets designed for the type of tunnel have the greatest effect with the least use of water. Both the fire alarm system and the extinguishing equipment must take account of the special surrounding conditions in the tunnel. Both systems must demonstrate a high immunity to breakdowns and to atmospheric and ambient influences; they must be easy to maintain and must be capable of return to functional status simply so that traffic is not delayed for an extended period.

6. Fibro Laser technology also supports digital image processing systems

Digital image processing systems are increasingly used for monitoring and management of the ever more heavily traveled roadways. The efficient systems record the number, type, and speed of the vehicles, recognize tailbacks, accidents, breakdowns, people driving on the wrong side of the road, and they optimize stop times at signals. This allows the monitoring personnel an early visual assessment of the situation, and gives valuable information regarding the location of the accident, the spread of the fire, the formation of smoke, etc. The rescue services can thus take appropriate precautions (signaling, alarming, closure) and can intervene in a meaningful way. A fire alarm in a tunnel must be dealt with quickly and in a manner appropriate to the situation. Siemens has therefore developed an algorithm for the automatic detection of smoke on video images. The basis for this is digital image analysis, which captures camera images via a high-quality processor and analyzes them with a special procedure. In tunnels, a draft with a speed of several meters a second is almost always blowing.

This wind means that any smoke arising moves relatively quickly past one of the cameras, which as a rule are installed 200 to 300 meters apart. The formation of

smoke clouds visibility, which, on the camera image, results in a decline in contrast between the brightest and darkest points. Smoke can thus be detected as the camera

image recognizes and analyzes the decline in contrast. The complex signal analysis takes place within seconds; in the case of an alarm, it automatically sends live pictures of the affected sector to the central monitoring station. Heavy fog buildup in the tunnel can also trigger the transmission of the video signal. However, the video monitor also shows the safety personnel whether the situation is dangerous or not. Video smoke detection can also be installed in buildings. The evaluation algorithms must, however, be adjusted to the changed ambient circumstances. The Fibro Laser fire alarm system locates the fire precisely, even if visual perception via the camera is no longer possible because of strong smoke buildup.

Siemens is a turnkey suppler for traffic safety technology.

With its I&S division, Siemens has a business area specializing in intelligent traffic systems. Alternately with SBT, this business area coordinates tunnel projects as a turnkey supplier, as well as all Siemens divisions offering safety solutions for tunnels if required.

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Tours of the tunnel in Flums

accredited building materials testing laboratory (tests of mineral materials such as cement, gravel, finished parts, rock, etc.) Gotthard basic tunnel project (at 57 km, the longest tunnel in the world, at the same time a high overlay of over 2,000 m for the major part of the length, with resulting mountain temperatures of about 45 °C) Tunnel drilling machine (explanation of various advancing technologies with the associated advantages and disadvantages) Cement plant (Hagerbach trial tunnel has its own cement plant for the manufacture of cement for trial and testing purposes) Fire tests (testing stand with the possibility of testing temperatures up to 1,350°C) Fire tunnels with installations for fire department training Trials for seismic advance reconnaissance using small explosions


Siemens-Technology: Manfred Maegerle Siemens Building Technologies Group Product Manager linear heat detection systems Fire detection for industrial and tunnel applications Guided tour through the gallery (11:45 am -12:30 pm)

Volker Wetzig Hagerbach tunnel Head of Research and Development Guide for photographers (11:00 am -12:30 pm and if required 1:15 ­ 2:00 pm) Frank Waibel Hagerbach tunnel Research and Development Department


Monika Bruecklmeier Siemens Press Office Tel. +49 89 636 34782 Email: [email protected] Volker Dragon Siemens SBT Press Office Tel. +41 41 724-2647 Email: [email protected]



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