Eliminating outdated tunnel equipment and technology, reducing tunnel safety hazards!

How many existential hazards are there in the tunnels?

As a closed place, the more combustible substances in the tunnel, the greater the fire risk, and after the fire, the higher the heat generated, the stronger the smoke and gas, the longer the duration of the burning, the greater the damage to people!

During the recent two sessions, Liu Feixiang, a deputy to the National People's Congress and chairman of China Railway Construction Heavy Industry Group, submitted a number of proposals, one of which was to speed up the elimination of outdated tunnel equipment and technology.

In the early tunnel, there was no tunnel fire-proof board decoration, and the cement board and line were completely exposed, giving people a more depressed and dirty feeling. When the driver drives the car from the bright outdoor vision suddenly into the gray environment, the eyes need a period of time to adapt to the light, if you do not pay attention to slow down is easy to cause a car accident. There is a big security risk.

In addition to fire and affected vision and other factors, the phenomenon of water seepage in the tunnel wall if not controlled, will also lead to the tunnel environment become humid, the wall mold, fall off, resulting in more safety hazards. In order to improve the safety factor of the tunnel and reduce the risk of fire, the tunnel fire protection board has been widely used in various tunnels in recent years。

How to choose the tunnel fire board?

The fireproof materials and decorative materials used in the tunnel must be guaranteed in quality, not only the decorative effect, but also the fire performance must be able to achieve the relevant indicators, so how do we choose the tunnel fire board?

1, the fire resistance limit in the tunnel can not be less than 2 hours.

According to the state regulations, the tunnel fire retardant board is divided into:

A class of tunnel fire retardant board (RABT heating curve) fire resistance 3.83 hours;

Second class tunnel fire retardant board (RABT heating curve) for 3.3 hours;

Three types of tunnel fire-proof panel (HC carbon-hydrocarbon heating curve) fire resistant for 2 hours;

Four types of tunnel fire-proof panels (" Fire Test Method for Building Construction "heating curve) fire resistant for 2 hours; Fire retardant panel (HC carbon hydrocarbon heating curve) in highway traffic tunnel for 2 hours.

2, What type of fire board material to choose?

On the market, asbestos-free calcium silicate board or reinforced fiber cement board is mainly used as the substrate, and steel metal composite is also used, and the cost of the latter will be slightly higher.

3. What is the density of the fireproof board?

In order to facilitate later maintenance, the density of the tunnel fire protection board used is generally lower than 1.6g/cm³.

Sanle tunnel decorative plate is a material specially designed for tunnel fire protection and decoration, and the tunnel is underground and relatively closed environment. The decoration requirements have fire, moisture, light conduction and other properties. When a fire occurs in the tunnel, the tunnel fire protection board can effectively prevent the spread of the fire, will not produce toxic smoke, no flame transmission.

Sanle tunnel fire-resistant decorative board with asbestos-free calcium silicate board as the substrate, the surface after grinding, waterproof treatment, coated with UV primer and UV putty, the natural color of the tunnel plate coating through the heat transfer process transfer curing on the substrate production, with dense non-porous, smooth, not easy to stick, easy to clean A1 fire-resistant board.

Is Sanle tunnel fire decorative board reliable?

The asbestos-free calcium silicate board of Sanle Tunnel fire decorative board has been cured by high temperature autoclave, which avoids the dry shrinkage and cracking phenomenon of other cement-based boards caused by climate and seasonal changes in the production process. Anti sunlight, anti rain, anti moisture, anti acid fog and so on. The thermal expansion and contraction coefficient is small, the size is stable, and the size almost does not change with the change of temperature. It has the advantage of acid and alkali resistance, and can be applied to wet and dark environments such as tunnels.

Asbestos-free calcium silicate board as A substrate, so that the tunnel fire decorative board inherit the excellent characteristics of asbestos-free calcium silicate board, with A grade fire characteristics at the same time, laid the foundation for the safety of the tunnel, the surface of the special coating, can do a variety of visual effects, with anti-vertigo function, and more light, high strength, good toughness, easy to handle and construction.

The installation method of the fireproof decorative plate of Sanle Tunnel is fixed with metal pendants and light steel keel, so that the plate and the main structure are in a non-rigid fixed state, and the wall plate will be displaced with the deformation of the main body of the building under the action of external forces, and the plate itself will not be deformed and cracked. Convenient installation, dry operation construction, low labor intensity, fast construction efficiency.