Abstract: The invention relates to a tunnel form comprising: two vertical forming walls (2) joined by a horizontal wall (3) in two parts (3A), and 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.

Abstract: The invention relates to a tunnel form comprising:

Abstract: The present invention relates to improvements in U-shaped tunnel framings for poured concrete constituted of two half shells or half casings in the form of a right-angled dihedron. The framings are characterized by the combination in each half casing of a horizontal beam composed of two telescopic sections, a set of panels of modular width resting on the two sections of the horizontal beam and being juxtaposed exactly with respect to it and a horizontal reinforcing beam for stiffening and supporting the bottom of the half casing and located inwardly of its vertical panel. The invention is applicable to the simultaneous construction of walls and ceilings of poured concrete.

Abstract: This invention relates to U-shaped tunnel-type forms for poured concrete having an upper horizontal panel resting on two spaced vertical sides which, in turn, are separated on the ground by a combination of jacks and wheels. The bottom portions of the two sides are connected by plural horizontal retractile tie beams. The upper horizontsl panel is supported by articulated horizontal beams pivotal at their ends and in the middle to permit the panel to be deformed by curving it downward, thereby pulling toward each other the spaced corners or edges of the dihedrons formed by the junctures of the spaced vertical sides and the horizontal panel.