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1. (WO1991006745) AN ARRANGEMENT IN A TUNNEL VAULT
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CLAIMS :
1 .
An arrangement in tunnel vaults (1) comprising elongated elements (2) which are - preferably watertight, fire-proof, heat insulating and sound dampening - and are suspended at each end by the aid of suitable fastening means from arch profiles (3) to cover the raw vault (5), if desired a concrete cover (6) of a blasted tunnel (4), in which said arch profiles (3) which extend across the longitudinal direction of the tunnel vault (1), are fastened to said raw vault (5), if desired concrete cover (6), by the aid of anchoring bolts (7) the free ends of which are releasably connected with arch profiles (3) by the aid of fastening means (8), which elements are suspended from a pair of successive arch profiles (3) and have equal length (L), at least in groups, c h a r a c t e r i z e d i n that the arch profiles (3) comprise fastening portions (3c) facing the rear sides of elements (2) in order to support said elements (2) by the aid of fastening means (9), which fastening portions (3c) have a total width (B) which is larger than the distance between fastening means (9) at two adjacent ends of two elements (2) which are aligned in the longitudinal direction, whereiiϊ elements (2) may be fastened to the fastening portions (3c) of arch profiles (3) at an adjustable mutual distance (A) for correction, as known per se, of any deviations from the normal center distance between arch profiles (3) along corresponding portions of the same, e. g. in case of bends in tunnels.

2.
An arrangement according to claim 1,
c h a r a c t e r i z e d i n that fastening means ( 9 ) consist of bolts/screws (9a) extending through holes (2e) in elements (2) for cooperation with holes (9b) in the fastening portions (3c) of arch profile (9b).

3.
An arrangement according to claim 2,
c h a r a c t e r i z e d i n that holes (2e) and (9b) are provided on the site by the aid of suitable means as known per se, while the element (2) is firmly held in a correct position.

4.
An arrangement according to claim 2,
c h a r a c t e r i z e d i n that screws (9a) are self- tapping, if desired, selv-drilling as well.

5.
An arrangement according to any of the preceding claims, c h a r a c t e r i z e d i n that the cross section of arch profile (3) is U-shaped with a web (3b) and legs (3a) having transversal flanges at their ends, which constitute the fastening portions (3c) for elements (2), and that the web (3b) directly or indirectly constitutes the fastening portion for the fastening means (8) of anchoring bolts (7).

6.
An arrangement according to claim 5 ,
c h a r a c t e r i z e d i n that the end of anchoring bolt (7) is threaded and extends through holes (3d) in web (3b) of arch profile (3), and is fastened to the latter by the aid of at least one nut (8a), preferably two nuts (8a) for fixation of the arch profile (3) on anchoring bolt (7).

7.
An arrangement according to claim 5 ,
c h a r a c t e r i z e d i n that arch profile (3) has projections, if desired, grooves (10) at each end of web (3b) for cooperation with a, preferably resilient gripping hoop (8b) with gripping ends (8c) facing each other, which hoop at its central portion is adjustably fastened to anchoring bolt (7) by the aid of means known per se.

8.
An arrangement according to claim 7,
c h a r a c t e r i z e d i n a clamping bolt (11) with a nut (12) extending through a hole (13) in each hoop leg to ensure the grip of gripping hoop about/in the projection, if desired groove (10) of arch profile (3).

9.
An arrangement according to claim 1 and any of the remaining preceding claims, c h a r a c t e r i z e d i n that elements (2) in groups show different widths (Cl, C2) in order to achieve a smooth adaptable transversal profile of the tunnel vault (1) with elements (2) of large width (Cl) at the lower wall portions (la) of the tunnel vault which, if desired, are substantially straight, and elements of less width (C2) at the curved upper wall portions and ceiling of the tunnel .

10.
An arrangement according to claim 1,
c h a r a c t e r i z e d i n that elements (2) consist of cassettes comprising a front face of perforated steel plate (2a) facing the tunnel (4) space, and a filler material (2b) of mineral wool or another suitable material, and a rear face consisting of a water-tight and mechanically strong plastic film (2c) which covers the filler material (2b) and extends beyond the rear edge portions (2d) of the cassette for water-tight connection with the plastic films of adjacent elements (2) and with arch profiles (3).