There are two types of tunnel elements: 79 standard and ten special elements. The tunnel elements will be manufactured in large production sites on land.
A new concept
The concept of the special elements is new in immersed tunnel technology. The process has several advantages. The entire mechanical and electrical equipment, which takes up space and requires maintenance, is integrated in the special elements in an additional level under the traffic routes. In this way, the standard elements can have a more simplified technical design and are thus more suited to series production.