Amsterdam Schiphol Airport 90 years old and in top shape
Apr 07, 2008
Schiphol is constantly being expanded and drained. A particular feature of the area is that it is 3 meters below sea level. With the skill of the Dutch in draining polders, this land was wrung from the sea around 1850. Draining the land today means different challenges need to be met: de-icing liquids used in the Winter are separated from the rainwater and drained off separately for environmental protection reasons.
To guarantee safe air traffic operations, the rainwater accumulated must be quickly, directly, and completely collected and drained off. To do this, channels must be installed on the surface whose gratings need to meet the architectural demands as well as provide the stability necessary for heavy loads. For Schiphol, load class F 900 was necessary for installation lengths of 2 m and nominal widths of up to DN 500.
F 900 is the highest of 6 categories and is used "where particularly high wheel loads will be expected, such as on airport operating surfaces" as per DIN EN 1433. The operational safety required according to DIN is achieved by bolting the grating and channel together 8 times per meter. The 4 mm thick solid steel edge angle provides additional stability, serves as corrosion protection, and provides sufficient lateral holding force when connected laterally to the surface layer.
Amsterdam Airport Schiphol received the "Europe's Best Airport" award from the Airports Council International ACI in the year 2007 in the category of airports with more than 25 million passengers per year. One criterion in the assessment was environmental protection.
In case of an accident, the airport planners required shut-off devices securely fastened to the body of the channel that could be used to utilize the backup volume of the channel to trap liquids. To guarantee permanent operation, a trapezoid spindle made of V2A stainless steel was inserted in a sleeve made of gun metal. It can be opened and closed mechanically and permits the de-icing liquids sprayed on the airplanes on cold Winter days to be separated in the channel system and then drained off separately.
Certain surfaces on the airfield where materials hazardous to the groundwater are handled were equipped with different channels with special sealing joints. In this case, the sealing material adheres to both sides of the joint and is fully elastic along the entire length of the joint. Expansion due to temperature variations and minor settling can therefore be compensated for, and the channel will not leak. The expansion joints can be viewed from above, which makes inspection and maintenance easier.
The number of passengers at Schiphol Airport increased by 4.3% in the years from 2004 to 2006 while the total air freight tonnage increased in the same period by 5.3%, and there is no end to the growth in sight. In the year 2006, more than 440,000 flight movements were registered. A seventh runway is already being considered, but there are problems with noise protection for downtown Amsterdam, which is only 15 km away, and the surrounding communities. For more than 20 years, a utopian plan has existed to relocate the entire airport to an island in the North Sea about 30 km from the Dutch coast. The project is still considered to be too expensive today and remains an option for the future.
The only terminal, which was last expanded in 1994, is divided into 3 large arrival zones. All businesses and services are united under one roof in the "Schiphol Plaza", which also attracts non-passengers due to its easy access. The businesses here are naturally open until midnight seven days a week. Even the Rijksmuseum has exhibition galleries for classic art as well as modern art in this uninhabited city. You can even find a chapel and a registry office here. This means you don't have to waste time anymore between the wedding and the beginning of the honeymoon.
BIRCO Baustoffwerk GmbH
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