| 摘要 |
The invention relates to a tunnel form comprising: two vertical forming walls (2) joined by a horizontal wall (3) in two parts (3A), at the base of the form, means for adjusting the height of the position of the top edge (5) of the tunnel form relative to the reference surface (6), and means of support (7) at least indirectly with the reference surface so that it can be extracted from the tunnel after production. This tunnel form is characterized in that the aforementioned height adjusting means (4) are supported by props (9), each slide-mounted in a sleeve (10) attached to the base of the tunnel form.
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