ETFE domes station Utrecht
The Utrecht train station square faced a complete make-over.
Buitink Technology demonstrated a phenomenal piece of design and
engineering work by installing innovative inflatable cushions in
the dome at 30 meter height. A total of 49 transparent ETFE foil
cushions were placed in the steel framework.
Magnificent drawings visualized the make-over of the Utrecht
train station square in the initial phase of the project. Our ETFE
foil roof elements, placed in the round gaps in the roof framework,
in reality showing the envisaged results as confirmed by below
Round inflatable cushions of ETFE foil
Buitink Technology provided 49 inflatable roof elements of ETFE
foil, each with a diameter of 7.2 m. Inflating the foils, using
controlled air pressure, creates a rain and storm resistant
connection between cushion and frame work. The correct shape of the
inflated cushion is created through cutting "banana shaped" strips
of foil, which are welded together.
Project engineering ETFE inflatable air cushions
aBesides producing the round inflatable cushions of ETFE foil,
Buitink Technology also did the engineering. Furthermore Buitink
Technology delivered and installed the air compressor system with
piping as well as the control systems. This system keeps the air
pressure in the cushions at the correct value.
In each project (so also in the "Utrecht train station square"
ETFE air cushion project) a full scale strength analysis is done to
calculate the forces exerted in and on the foil. An example of an
analysis with various loads is given below:
Our construction team placed the ETFE cushions at a height of 30
m above ground level, including air compressor system, piping and
Project data ETFE dome's train station square:
||49 ETFE cushions 7 meter diameter each
||transparent ETFE foil, transparent
||community of Utrecht
||Ector Hoogstad Architecten
||Royal Haskoning DHV