Tunnel construction

Abstract

Tunnel structure with a tunnel wall (2) to which functional panels (3), in particular fire protection panels, are fixed, wherein cladding panels (4) are fixed to the tunnel wall (2) by means of a fastening system (5), wherein the cladding panels (4) have peripheral sides, wherein the peripheral sides comprise an upper side (29), a lower side (30) and two high sides (28) connecting the upper side (29) and the lower side (30), characterized in that the fastening system (5) comprises support rails (6) which are arranged on the functional panels (3) and are fixed relative to the tunnel wall (2), wherein the support rails (6) run along the high sides (28) of the cladding panels (4) and wherein the cladding panels (4) are held on the support rails (6).

Description

The invention relates to a tunnel structure of the type specified in the preamble of claim 1.WO 2007 / 028427 A1 discloses a tunnel structure in which fire protection panels are fixed relative to the tunnel wall. The tunnel structure comprises U-shaped rails, on which horizontal cross struts are fixed. The fire protection plates are screwed onto the cross braces.DE 20 2024 104 764 U1 discloses a tunnel structure in which cladding panels are fixed to the tunnel wall. The cladding panels are held on the tunnel wall by fastening systems which are fixed to the tunnel wall at fastening points spaced apart from one another.The invention is based on the object of creating a tunnel structure of the generic type which has a simple structure.This object is achieved by a tunnel structure having the features of claim 1.Because the functional panels are secured to the tunnel wall, the cladding panels only have to fulfil the cladding function. The usually comparatively heavy fire protection panels are not fixed to the tunnel wall via the fastening system. As a result, the fastening system can be designed comparatively easily. The fact that the fastening system comprises mounting rails which are arranged on the functional panels and are fixed with respect to the tunnel wall, and that the mounting rails run along the high sides of the cladding panels and the cladding panels are held on the mounting rails results in a simple construction.The fastening system has, in particular, suspension elements fixed to the cladding panels. The cladding panels can thereby be arranged by simply hanging them on the tunnel wall. Fixing the cladding plates via individual fastening elements such as screws can be omitted. After the mounting, the cladding panels are in particular held firmly. In particular, the cladding panels are fixed to the tunnel wall exclusively by being suspended. Additional fastening elements are not provided in particular.In particular, the suspension elements are suspended directly on the support rails. This enables a very simple construction of the tunnel structure with few, simply constructed parts.In particular, a plurality of suspension elements are fixed on at least one high side of the cladding panels.In particular, the upper side of the cladding panel extends approximately in the vertical direction.The suspension elements are in particular fixed separately from one another on the cladding panel. As a result, the material outlay for the suspension elements can be significantly reduced compared to the configuration of the suspension elements on a continuous rail. A simple type of fixing results if the suspension elements are fixed to the cladding panel by means of fastening rivets. In particular, a plurality of suspension elements are suspended in a support rail. In particular, all the suspension elements arranged on a high side of the cladding panel are suspended on a common support rail. In particular, the suspension elements arranged on a first high side of the cladding panel are suspended on a first support rail and the suspension elements arranged on a second high side of the cladding panel are suspended on a second support rail.The suspension elements are in particular designed as angles. In particular, the suspension elements are formed as angles from bent sheet metal. The suspension elements have in particular a fastening section and a suspension section. The fastening section runs in particular transversely, in particular approximately perpendicularly, to the plane of the cladding panel. The suspension section runs in particular approximately parallel to the plane of the cladding panel. In particular, the suspension section and the fastening section run perpendicular to one another. The configuration of the suspension elements as angles results in a simple construction and simple production.The suspension section protrudes in particular into a slot of the support rail. By arranging it in a slot of the support rail, securing of the cladding panel both in the direction away from the wall and in the direction toward the wall can be ensured in a simple manner. In particular, the suspension section is held clamped in the slot of the support rail. The width and / or the shape of the slot is in particular matched to the suspension section in such a way that a clamping fixing results. For example, the edges of the slot can be rounded and the suspension section can be clamped between the rounded sections. Alternatively or additionally, it can be provided that the side walls of the slot run inclined with respect to one another and the slot width decreases with increasing slot depth.In particular, the suspension elements of two adjacent cladding plates are suspended on a common support rail. This results in a simple construction and the number of support rails required can be kept comparatively small. A simple configuration results if at least one support rail has two mutually opposite side cheeks protruding away from the functional plate, wherein a first cladding plate is hooked on a first side cheek and a second cladding plate is hooked on the second side cheek.In particular, the covering plate is limitedly displaceable in the horizontal direction with respect to the support rail. This makes it possible in a simple manner to adjust the cladding plates in the horizontal direction. In particular, a constant distance of the cladding plates from one another can be set by the horizontal adjustment. This results in an appealing exterior of the wall. In particular, the distance between adjacent cladding panels is as small as possible. As a result, a largely closed surface of the wall can be optically produced.In particular, the cladding panels have no suspension elements on their upper side and on their lower side. This simplifies the construction of the tunnel structure.In particular, the cladding plates each comprise a cladding element, on the side of which facing the functional plate a reinforcing plate is arranged. In a simple design, the cladding element is made of sheet metal, in particular of bent sheet metal. An attractive optical design results, for example, when the cladding element is enameled.In particular, the cladding element has an edge section projecting in the direction of the tunnel wall at least on the high sides of the cladding panel. The edge section can be formed in particular by a bent-over edge of a metal sheet forming the cladding element. The edge portion increases the stability of the trim panel. In particular, the cladding element has an edge section projecting in the direction of the tunnel wall on the upper side and / or on the lower side. In particular, the cladding element has an edge section projecting in the direction of the tunnel wall on all circumferential sides.In particular, the suspension elements are arranged at least partially on the side of the edge section facing the reinforcing plate. The edge sections allow a good, simple fastening of the suspension elements. By virtue of the arrangement at least partially on the side of the edge section facing the reinforcing plate, the suspension elements can be arranged such that they are largely invisible from the side of the cladding plates facing the tunnel interior.In particular, the suspension elements are completely covered by the covering element when viewed perpendicularly to the covering panel.The high sides of the cladding panels extend in particular approximately parallel to the tunnel wall. The high sides of the cladding panels are in particular inclined at most 10° with respect to the tunnel wall.The vertical sides of the cladding panels extend in particular approximately in the vertical direction. The high sides of the cladding panels are in particular inclined at most 10° with respect to a vertical. An inclination of the high sides of the cladding panels to the vertical can result, for example, in an ascending or descending course of the tunnel structure.The distance between adjacent cladding plates is in particular comparatively small. In particular, the high sides of adjacent cladding panels are at most at a distance of 5 cm from one another, in particular at most at a distance of 3 cm from one another. It can also be provided that the high sides of adjacent lining panels abut each other, at least on fastening elements of the suspension elements protruding beyond the edge sections.In particular, at least one support rail has a plurality of openings for fixing with respect to the tunnel wall. This allows simple fixing of the support rails. The support rails can be screwed fast to the functional plates, for example the fire protection plates. In particular, the support rails are fixed to the tunnel wall by fastening elements which project through the functional plates.In order to be able to compensate tolerances of the fastening openings on the tunnel wall or the functional plate, it is provided that the openings have different lengths in the longitudinal direction of the support rail. In particular, the openings arranged near the ends of the support rail have a greater length than the openings located therebetween. The openings comprise in particular at least one first opening with a first length measured in the longitudinal direction of the support rail and at least one second opening with a second length measured in the longitudinal direction of the support rail. The second length is in particular greater than the first length. The second opening is closer to the end of the support rail that is close to the second opening than the first opening. In particular, the openings arranged adjacent to the ends of the support rail are designed with the increased second length, and the inner openings lying between these outer openings have the reduced first length. In particular, the openings are round and the first length and the second length correspond to a diameter of the openings. However, a configuration of the openings as an elongated hole may also be advantageous.An exemplary embodiment of the invention is explained below with reference to the drawings. The following are shown: FIG. 1 shows a perspective, detail illustration of a tunnel structure, FIG. 2 shows a perspective, sectional illustration of a lining panel and of a suspension element fixed to the lining panel, and FIG. 3 shows a sectional illustration of the arrangement from FIG. 2, FIG. 4 shows a perspective, detail illustration of a mounting rail and a cladding plate arranged thereon, FIG. 5 shows a section through the arrangement from FIG. 4, FIG. 6 shows a perspective illustration of the support rail, FIG. 7 shows a side view of the support rail from FIG. 6, FIG. 8 is a side view of the support rail from FIG. 7 in the direction of the arrow VIII in FIG. 7, FIG. 9 is a representation of the sheet metal from which the support rail is bent, before the bending process, FIG. 10 shows an enlarged illustration of the detail X in FIG. 7, FIG. 11 is a sectional view taken along the line XI--XI in FIG. 8, FIG. 12 shows an enlarged illustration of the detail XII in FIG. 8, FIG. 13 shows an enlarged illustration of the detail XIII in FIG. 8, FIG. 14 shows a perspective illustration of the suspension element, FIG. 15 shows a side view of the suspension element from FIG. 14.FIG. 1 shows a tunnel structure 1 in a partially cut-away illustration. The tunnel structure 1 has a tunnel wall 2. In the exemplary embodiment, the tunnel wall 2 extends approximately vertically. In an alternative embodiment, the tunnel wall 2 can also extend in a partially curved manner. Functional plates 3 are secured to the tunnel wall 2. The functional panels 3 are in particular fire protection panels. The tunnel wall 2 can consist, for example, of rock, concrete and / or reinforced reinforced concrete. The functional plate 3 is arranged in particular flat directly on the tunnel wall 2. The functional plate 3 can be glued and / or denatured on the tunnel wall 2, for example. Fixing in another way may also be advantageous. The functional plate 3 can comprise concrete, for example, in particular consist of concrete. If the functional plate 3 is designed as a fire protection plate, it is provided in particular that the functional plate 3 consists at least partially, in particular completely, of mineral material, preferably of calcium silicate or cement-bound calcium silicate.Cladding panels 4 are fixed to the tunnel wall 2. The cladding panels 4 are fixed relative to the tunnel wall 2 by means of a fastening system 5. The cladding panels 4 can be fixed to the tunnel wall 2 itself or to the tunnel wall 2 via the functional panels 3.The fastening system 5 comprises support rails 6.The support rails 6 extend in particular approximately parallel to the tunnel wall 2. in particular the support rails 6 are inclined relative to the tunnel wall 2 by an angle of less than 10°. In particular, the tunnel wall 2 extends perpendicularly.In the exemplary embodiment, the support rails 6 are arranged parallel to a vertical 32. The support rails 6 accordingly extend approximately vertically. The support rails 6 can be inclined relative to the vertical 32 by an angle of, for example, up to 10°.Because the functional panels 3 are secured directly to the tunnel wall 2, the cladding panels 4 can be designed with a comparatively low weight. As a result, the cladding plates 4 can be formed comparatively large.The cladding panels 4 each have an upper side 29, an underside 30 and two mutually opposite upper sides 28 connecting the upper side 29 and the underside 30. The upper side 29, the lower side 30 and the two upper sides 28 are the circumferential sides of the cladding panels 4. the cladding panels 4 have a width e measured between the upper sides 28 and a height f measured between the upper side 29 and the lower side 30. The width e can be in particular more than 1.0 m, for example 1.0 m to 1.5 m. The height f is in particular more than 1.0 m, in particular more than 2.0 m. Advantageously, the height f is more than 2.5 m. The height f is in particular from 2.5 m to 4.0 m. In particular, each cladding panel 4 extends over the entire height of the tunnel wall 2 to be clad. As a result, a surface acting substantially closed can be achieved on the longitudinal sides of the tunnel structure 1.The high sides 28 of the cladding panels 4 extend in particular approximately parallel to the tunnel wall 2. in particular the high sides 28 of the cladding panels 4 are inclined at most by an angle of 10° with respect to the tunnel wall 2.In particular, the high sides 28 of the cladding panels 4 extend approximately in the vertical direction. In particular, the high sides 28 of the cladding panels 4 are inclined at most by an angle of 10° with respect to the vertical 32.Adjacent support rails 6 are at a distance d from one another. The distance d is measured in particular perpendicular to the longitudinal directions of the support rails 6. The distance d is in particular smaller than the width e, for example smaller than the width e by 1 cm to 10 cm.Adjacent cladding plates 4 are at a distance a from one another. The distance a is measured perpendicular to a top side 28 of one of the cladding plates 4. The distance a is in particular at most 5 cm, in particular at most 3 cm. It can be provided that the cladding panels 4 abut each other and the distance a is 0 cm.The support rails 6 run along the high sides 28 of the cladding panels 4.The fastening system 5 comprises suspension elements 7 fixed to the trim panels 4. In FIG. 1, the suspension elements 7 are partially concealed by the trim panels 4 and are therefore only partially visible. In particular, the suspension elements 7 are not visible in the installed state.In the exemplary embodiment, the fastening system 5 does not comprise any device for adjusting the height of the cladding panels 4 with respect to the tunnel wall 2, resulting in a simple construction of the fastening system 5.FIGS. 2 and 3 show the design of a suspension element 7 and its fixing to the associated cladding panel 4 in detail. As FIGS. 2 and 3 show, the cladding panel 4 in the exemplary embodiment is constructed from a cladding element 34 and a reinforcing panel 35 arranged thereon. The cladding element 34 can be, for example, a metal sheet, in particular a bent metal sheet.As FIGS. 2 and 3 show, the cladding element 34 is formed on its high sides 28 with an edge section 37 projecting in the direction of the tunnel wall 2 (FIG. 1 ). In the exemplary embodiment, the edge section 37 is an edge which is bent over towards the tunnel wall 2 and extends at right angles to the visible side of the cladding panel 4. The rim portion 37 has a side 39 facing the reinforcing plate 35. This side 39 is facing away from an adjacent reinforcing plate 35 and is not visible when the cladding plate 4 is mounted. The suspension element 7 is arranged and fixed on the side 39.In the exemplary embodiment, the cladding panel 4 has openings 25 on its high side 28, in particular in the edge section 37. In the exemplary embodiment, two openings 25 are provided for each suspension element 7. The suspension element 7 is fixed to the cladding panel 4 by means of fastening rivets 21 projecting through the openings 25. Another type of fixing can also be provided.As FIGS. 2 and 3 show, the suspension element 7 is formed as an angle in the exemplary embodiment. The suspension element 7 has a fastening section 13 abutting the edge section 37 and a suspension section 14 extending perpendicular to the fastening section 13 in the exemplary embodiment. The suspension section 14 can also enclose an angle deviating from 90° with the fastening section 13.In particular, all the suspension elements 7 on a high side 28 of a cladding panel 4, in particular all the suspension elements 7 of the fastening system 5, are of identical design.The cladding panel 4 has a front side 40. The front side 40 is the side of the trim panel 4 that is visible in the installed state. The suspension section 14 extends approximately parallel to the front side 40 of the trim panel 4.As FIG. 3 shows, the reinforcing plate 35 is arranged on a side 31 of the cladding element 34 that is close to the tunnel wall 2. The reinforcing plate 35 is not visible in particular when the cladding plate 4 is fixed to a tunnel wall 2. The reinforcing plate 35 is made in particular partially, in particular completely, of mineral material and / or of metal. In particular, the reinforcing plate 35 consists at least partially, in particular completely, of calcium silicate, gypsum plaster board or cement-bound material. In particular, the reinforcing plate 35 consists at least partially, in particular completely, of foamed metal, in particular foamed aluminum.As shown in FIG. 3, the reinforcing plate 35 has a thickness g. The cladding element 34 has a thickness h. The thickness h is in particular the sheet thickness of the cladding element 34; the thickness h is significantly smaller than the thickness g. In particular, the thickness g is at least twice, in particular at least three times, in particular at least 4 times, the thickness h.As FIGS. 1 to 3 show, a plurality of suspension elements 7 are fixed separately from one another on the cladding panel 4. On each high side 28 of a cladding panel 4 a plurality of suspension elements 7 are arranged, which are suspended in a common support rail 6, as shown in FIG. 1. On each high side 28, in particular 4 to 12 suspension elements 7 are arranged.The suspension elements 7 are designed in particular as angles. In particular, all the suspension elements 7 are of identical design.As FIGS. 4 and 5 show, the support rail 6 has slots 15. A suspension section 14 of a suspension element 7 is suspended in each slot 15, as can be seen from FIGS. 4 and 5. A plurality of suspension elements 7 of a cladding plate 4 are suspended in each support rail 6. In the horizontal direction parallel to the plane of the cladding panel 4, the position of the suspension elements 7 is not exactly predefined. The hanging portion 14 can be slid transversely to the slot 15 in the slot 15 to adjust the horizontal position of the trim panel 4.In the exemplary embodiment, the support rail 6 has an approximately U-shaped cross section. The support rail 6 comprises a rail back 8 which bears against one or more functional plates 3. A first side cheek 9 and a second side cheek 10 extend from the rail back 8, In the exemplary embodiment, the side cheeks 9 and 10 extend perpendicularly to the rail back 8, and the side cheeks 9 and 10 have the slots 15. In particular, all the suspension elements 7 of a high side 28 of a cladding panel 4 are suspended in the same side cheek 9 or 10 of a support rail 6. The slots 15 are formed on receptacles 11 of the support rail 6, which are open towards the side facing away from the tunnel wall 2. The slots 15 are accessible for a suspension section 14 of a suspension element 7 from the side facing away from the tunnel wall 2.The support rail 6 is fixed to the tunnel wall 2 by means of fastening screws 33. One of the fastening screws 33 is shown in FIG. 5. The fastening screws 33 project in particular through the functional plates 3.As FIG. 5 shows, the cladding panel 4 is held by the fastening system 5 at a distance x from the functional panel 3. The distance x can be, for example, approximately 2 cm to 10 cm, in particular 4 cm to 6 cm.FIGS. 6 to 9 show the design of the support rail 6 in detail. As FIG. 6 shows, the side cheeks 9 and 10 of the support rail 6 have receptacles 11 for suspension elements 7 arranged at a uniform distance. In the exemplary embodiment, eight receptacles 11 are formed in each side cheek 9, 10 with a respective slot 15. For example, 4 to 12 receptacles 11 can be formed in each side cheek 9, 10. In particular, all the receptacles 11 in a side cheek 9 or 10, in particular all the receptacles 11 of the fastening system 5, are of identical design.As shown in FIG. 8, the rail back 8 has openings 17 and 18 for the fastening screws 33.The support rail 6 has a longitudinal direction 26. The support rail 6 has a first, upper end 19 and a second, lower end 20. The opening close to the first end 19 is a second opening 18, and the opening close to the second, lower end 20 is also a second opening 18, and first openings 17 are arranged between these second openings 18. The distance of the first openings 17 from the end 19 or 20 close to the respective opening is greater than the distance of the second openings 18 from the end 19 or 20 close to the respective opening. The length of the first openings 17 measured in the longitudinal direction 26 is smaller than that of the second openings 18.FIG. 9 shows the sheet metal blank of the support rail 6 before the side walls 9 and 10 are bent at bending lines 36. The flat sheet metal shown in FIG. 9 is cut out in particular by means of a laser. This allows simple production of the support rail 6 with high accuracy and low tolerances.FIG. 10 shows the configuration of a receptacle 11 in detail. The receptacles 11 in the side walls 9 and 10 are identical. At the entry into the slot 15, a bevel 41 can be formed, which facilitates the insertion of the suspension elements 7 into the slot 15. The slot 15 has two opposing side walls 42 and a bottom 43 connecting the side walls 42. In the exemplary embodiment, the bottom 43 is rounded. It can also be provided that the bottom 43 is straight and merges with rounded portions into the side walls 42. The slot 15 has a width k. The suspension section 14 of the suspension element 7 has a thickness m drawn in FIG. 15. The thickness m is in particular at most slightly smaller than the width k. As a result, the suspension element 7 and thus also the cladding panel 4 are fixed in the direction perpendicular to the tunnel wall 2.In particular, the suspension element 7 is held clamped in the slot 15. For this purpose, the side wall 42, 42' of the slot 15 can be inclined relative to one another by an angle α which can be, for example, 0.5° to 15°, in particular 0.5° to 5°. Alternatively or additionally, it can be provided that the bottom 43 of the slot 15 is rounded, as shown in FIG. 10. It can be provided that the suspension element 7 is held clamped on rounded portions of the base 43.FIG. 11 shows a section through the support rail 6, and as FIG. 11 shows, the side cheeks 9 and 10 are each arranged perpendicular to the rail back 8.FIG. 12 shows a first opening 17. the first opening 17 has a length b measured in the longitudinal direction 26 of the support rail 6. In the exemplary embodiment, the opening 17 is round, and the length b corresponds to the diameter of the opening 17.In FIG. 13, a second opening 18 is shown enlarged. The second opening 18 has a length c measured in the longitudinal direction 26 of the support rail 6. The length c of the second opening 18 is greater than the length b of the first opening 17, thereby permitting tolerances to be compensated for at the second openings 18 arranged near the ends 19 and 20 of the support rail 6.The second openings 18 are also round in the exemplary embodiment, so that the length c corresponds to the diameter of the openings 18.FIGS. 14 and 15 show the suspension element 7. the fastening section 13 of the suspension element 7 has two openings 16, through which fastening rivets 21 project in the assembled state. A different number of openings 16 can also be advantageous. Another type of fixing of the suspension element 7 to the lining panel 4 can also be advantageous. As FIGS. 14 and 15 show, the fastening portion 13 and the suspension portion 14 extend approximately perpendicular to one another.References included in the specificationThis list of documents cited by the applicant has been produced in an automated manner and is only included for the better information of the reader. The list is not part of the German patent application or utility model application. The DPMA does not take any adhesion for any faults or omissions.Patent Literature citedWO 2007 / 028427 A1

[0002] DE 20 2024 104 764 U1

[0003]

Claims

Tunnel structure having a tunnel wall (2) on which functional panels (3), in particular fire protection panels, are fixed, wherein cladding panels (4) are fixed to the tunnel wall (2) by means of a fastening system (5), wherein the cladding panels (4) have circumferential sides, wherein the circumferential sides comprise an upper side (29), an underside (30) and two upper sides (28) connecting the upper side (29) and the underside (30), characterized in that the fastening system (5) comprises mounting rails (6) which are arranged on the functional panels (3) and are fixed in relation to the tunnel wall (2), wherein the mounting rails (6) run along the upper sides (28) of the cladding panels (4) and wherein the cladding panels (4) are held on the mounting rails (6).Tunnel structure according to claim 1, characterised in that the fastening system (5) has suspension elements (7) fixed to the cladding panels (4).Tunnel structure according to claim 2, characterised in that the suspension elements (7) are suspended directly on the support rails (6).Tunnel structure according to claim 2 or 3, characterised in that a plurality of suspension elements (7) are fixed on at least one vertical side (28) of a cladding panel (4).Tunnel structure according to one of Claims 2 to 4, characterized in that the suspension elements (7) are fixed to the cladding panel (4) separately from one another, in particular by means of fastening rivets (21).Tunnel structure according to one of Claims 2 to 5, characterized in that a multiplicity of suspension elements (7) are suspended in a mounting rail (6).Tunnel structure according to one of Claims 2 to 6, characterized in that the suspension elements (7) are designed as angles, in particular made of bent sheet metal, which have a fastening section (13) running transversely, in particular perpendicularly, to the plane of the cladding panel (4) and a suspension section (14), the suspension section (14) running in particular approximately parallel to the plane of the cladding panel (4).Tunnel structure according to claim 7, characterised in that the suspension section (14) projects into a slot (15) of the support rail (6).Tunnel structure according to one of Claims 2 to 8, characterized in that the suspension elements (7) of two adjacent cladding panels (4) are suspended on a common mounting rail (6).Tunnel structure according to one of Claims 1 to 9, characterized in that at least one mounting rail (6) has two mutually opposite side walls (9, 10) which project away from the functional panel (3), a first cladding panel (4) being hooked on a first side wall (9) and a second cladding panel (4) being hooked on a second side wall (10).Tunnel structure according to one of Claims 1 to 10, characterized in that the cladding panel (4) can be displaced in a limited manner in the horizontal direction with respect to the mounting rail (6).Tunnel structure according to one of Claims 1 to 11, characterized in that the cladding panels (4) have no suspension elements (7) on their upper side (29) and on their lower side (30).Tunnel structure according to one of Claims 1 to 12, characterized in that the cladding panels (4) each comprise a cladding element (34), in particular made from sheet metal, on the side (31) of which facing the functional panel (3) a reinforcing panel (35) is arranged.Tunnel structure according to claim 13, characterised in that the cladding element (34) has an edge section (37) projecting in the direction of the tunnel wall (2) at least on the high sides (28) of the cladding panel (4), and in that the suspension elements (7) are arranged at least partially on the side (39) of the edge section (37) facing the reinforcing panel (35).Tunnel structure according to claim 13 or 14, characterised in that the suspension elements (7) are completely covered by the covering element (34) when viewed perpendicularly to the covering panel (4).Tunnel structure according to one of Claims 1 to 15, characterized in that the high sides (28) of the cladding panels (4) are inclined by less than 10° with respect to the tunnel wall (2).Tunnel structure according to one of Claims 1 to 16, characterized in that high sides (28) of adjacent cladding panels (4) have at most a distance (a) of 5 cm, in particular at most a distance (a) of 3 cm, from one another.Tunnel structure according to one of Claims 1 to 17, characterized in that at least one mounting rail (6) has a plurality of openings (17, 18) for fixing with respect to the tunnel wall (2), wherein the openings (17, 18) have at least one first opening (17) having a first length (b) measured in the longitudinal direction of the mounting rail (6) and at least one second opening (18) having a second length (c) measured in the longitudinal direction of the mounting rail (6), wherein the second length (c) is greater than the first length (b) and wherein the second opening (18) is arranged closer to the end (19, 20) of the mounting rail (6) that is situated close to the second opening (18) than the first opening (17).

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