SEALING PROFILE FOR CONCRETE TUBBING

Abstract

A sealing profile for embedding in a moulded part made of curable material. Spalling observed in practice, which occur, in particular, at corners of tubbings in the area with an integrated seal, can be effectively prevented or at least reduced by using a sealing profile where the flanks of the profile base, which is embedded within the moulded part, e.g., concrete tubbing, merge with rounded portions or chamfers into the profile base face. In addition, the at least one anchoring foot is located within the profile base face and thus outside the area of the rounded portions.

Claims

1. A sealing profile (1) for embedding into a moulded part (50) made of curable material, wherein the sealing profile (1) comprises a profile body (2), with a) a profile base (3) to be embedded within the moulded part (50), which, after embedding the sealing profile (1), comprises a profile base face (5) that faces the moulded part (50); and lateral profile base flanks (7), and b) a profile back (4) projecting from the profile base (3) which comprises a profile-back face (6) opposite the profile base face (5) and lateral profile-back flanks (8), and wherein, the sealing profile (1) has at least one anchoring foot (9) projecting from the profile base face (5), and the profile base flanks (7) merge into the profile base face (5) with rounded portions (10) or chamfers (21).

2. The sealing profile (1) according to claim 1, wherein the profile base flanks (7) in the cross-section of the sealing profile (1) before their transition into the rounded portions (10) or chamfers (21) run in the direction of profile base face (5) parallel to each other or towards each other.

3. The sealing profile (1) according to claim 1, wherein the rounded portions (10) run in the cross-section of the sealing profile (1) from a first transition point (16) in a curved line to a central profile axis (11) perpendicular to the profile base face (5) and, at a second transition point (17), merge into the profile base face (5), or the chamfers (21) run in the cross-section of the sealing profile (1) from a first transition point (16) in a polygonal line to a central profile axis (11) perpendicular to the profile base face (5) on the profile base face (5), and merge into the profile base face (5) at a second transition point (17).

4. The sealing profile (1) according to claim 1, wherein the curved arc of the rounded portions (10) extends across a maximum of 90°.

5. The sealing profile (1) according to claim 1, wherein the curved arc of the rounded portions (10) extends over at least 30°.

6. The sealing profile (1) according to claim 1, wherein the rounded portions (10) in the cross-section of the sealing profile (1) are at least partially circular-arc-shaped.

7. The sealing profile (1) according to claim 1, wherein the ratio of the length of the curved arc of the rounded portions (10) to the length B of the profile base face (5) in the cross-section of the sealing profile (1) is 1:5 to 1:8.

8. The sealing profile (1) according to claim 1, wherein the sealing profile (1) comprises two or more anchoring feet (9) distanced away from one another, thereby projecting away from the profile base face (5), and wherein the anchoring feet (9) are distanced away from the second transition points (17) of the rounded portions (10) or chamfers (21) in the profile base face (5) in the direction of the central profile axis (11).

9. The sealing profile (1) according to claim 1, wherein the ratio of the length of the curved arc of the rounded portions (10) to the length B of the profile base face (5) in the cross-section of the sealing profile (1) is 1:5 to 1:8.

10. The sealing profile (1) according to claim 1, wherein the ratio of the length of the curved arc of the rounded portions (10) to the length B of the profile base face (5) in the cross-section of the sealing profile (1) is 1:5 to 1:8.

11. The sealing profile (1) according to claim 1, wherein the sealing profile (1) extends in the longitudinal direction (12) in a strand-shaped manner.

12. The sealing profile (1) according to claim 1, wherein the sealing profile (1) in the profile body (2) comprises longitudinal channels (13).

13. The sealing profile (1) according to claim 1, wherein the profile body (2) has a generally hexagonal cross-section, and wherein two sides of the hexagon are formed of the profile base face (5) and the opposite profile-back face (6), and the remaining sides of the hexagon are formed of the profile base flanks (7) and the profile-back flanks (8).

14. The sealing profile (1) according to claim 1, wherein the sealing profile (1) consists of an elastomer material selected from the group consisting of EPDM, SBR, CR, NBR and TPE, and wherein the elastomer material has a shore hardness of 60-80 type D in accordance with DIN EN ISO 868.

15. A moulded part (50) made of curable material, comprising a sealing profile (1) according to claim 1 embedded into the moulded part (50) with the profile base (3).

16. The moulded part (50) according to claim 15, wherein the moulded part (50) is a concrete tubbing for tunnel construction, a concrete ring for shaft constructions, a concrete pipe for sewer or pipeline construction or a plastic pipe.

17. A sealing arrangement, comprising at least one moulded part (50) according to claim 15.

18. The sealing arrangement according to claim 17, comprising at least two moulded parts (50), wherein the moulded parts (50) with the profile-back faces (6) of their sealing profiles (1) rest on one another.

19. The sealing profile (1) according to claim 1, wherein the curable material is a concrete or plastic moulded part.

20. The sealing profile (1) according to claim 1, wherein the profile base flanks (7) in the cross-section of the sealing profile (1) before their transition into the rounded portions (10) or chamfers (21) run in the direction of profile base face (5) towards each other.

Description

[0043] The invention is explained in more detail below on the basis of the attached figures purely for illustrative purposes.

[0044] FIG. 1 Schematic illustration of a sealing profile for tubbings embedded in a moulded part according to prior art.

[0045] FIG. 2 Schematic illustration of an embodiment of a sealing profile according to the invention, embedded in a moulded part.

[0046] FIG. 3 Cross-section of the embodiment of a sealing profile according to the invention shown in FIG. 2.

[0047] FIG. 4 Cross-section by a further embodiment of a sealing profile according to the invention.

[0048] FIG. 1 schematically shows a spatial view of a moulded part 50, here a concrete blade for tunnel constructions, with a sealing profile 101 integrated in it according to prior art. Only one part of the moulded part 50 is shown.

[0049] The strand-shaped sealing profile 101 made of elastomer material comprises a generally hexagonal profile body 102 in the cross-section with a profile base 103 facing the moulded part 50 and a profile back 104 projecting from the profile base 103. The profile base face 105 of the profile base 103, which faces the moulded part 50, is opposed by a profile-back face 106 of the profile back 104. The profile body 102 has lateral profile-back flanks 108 and profile base flanks 107. The sealing profile 101 is embedded in the moulded part 50 by means of two generally dovetail-shaped, spaced anchor feet 109 starting from the profile base 103. The anchoring feet 109 are arranged laterally at the outer ends (corners) of the profile base 103. The outer face of the anchoring foot 109 shown here on the left forms the projection of the profile base flank 107 in the direction of moulded part 50; the outer face of the anchoring foot 109 shown in the figure on the right extends at an angle to the corresponding profile base flank 107 in the direction of moulded part 50. The sealing profile 101 comprises cavities running in the longitudinal direction 112 of the sealing profile 101 as longitudinal channels 113. The anchoring feet 109 and the profile base 103 are surrounded by the curable material, here concrete, up to sealing lips 114 on the flank side. A lateral projection 115 on the profile back 104 serves to clip the sealing profile 101 with the profile back 104 into a corresponding recess of a mounting of a formwork mould and to hold it there so that the sealing profile 101 remains directed towards the interior of the formwork mould during the casting process with the anchoring feet 109.

[0050] FIG. 2 shows part of an embodiment of a sealing profile 1 according to the invention (see also FIG. 3). The sealing profile 1 according to the invention is embedded in a moulded part 50 made of a curable material. Here, the moulded part 50 is a concrete tubbing for tunnel construction, and the sealing profile 1 correspondingly an integrated in a front side of the tubbing made of an elastomer material, for example, EPDM. The sealing profile 1 can be produced, for example, by means of extrusion. As indicated by the arrow, the strand-shaped sealing profile 1 extends in the longitudinal direction 12. Of the sealing profile 1, only one section is shown, which is cut to the front. The sealing profile 1 has a cross-section generally hexagonal profile body 2 with a profile base 3 and a profile back 4 projecting from the profile base 3. The profile base 3 has a profile base face 5 facing the moulded part 50, the profile back 4 a profile-back face 6 that is opposite the profile base face 5 and essentially parallel to the profile base face 5. The profile-back face 6 forms the sealing face in a sealing arrangement in which, for example, two moulded parts 50 with their sealing profiles 1 embedded into it on the front side with the profile-back faces 6 lie next to each other. The sealing profile 1 has cavities running in the longitudinal direction 12 as longitudinal channels 13, which are arranged here in three planes on top of one another. The sealing profile has lateral profile base flanks 7 and profile-back flanks 8. Projections 15 protrude laterally from the profile body 2, 4 in the area of the profile back, whereby the sealing profile 1 can be held during the casting of the moulded part 50 with the profile back 4 in a correspondingly complementary mounting of a formwork mould. Sealing lips 14 extending laterally from the profile body 2 on level 20 (see FIG. 3) of the transition between profile base 3 and profile back 4 are intended to prevent the penetration of curable material into the mounting of the formwork mould during the casting process of the moulded part 50. Level 20 also indicates the level below which sealing profile 1 is or will be embedded in the moulded part. The sealing profile 1 is anchored here with two anchoring feet 9 expanding in the cross-section in the direction away from the profile base face 5 in a dove-tail-like manner in the cross-section within the moulded part 50. The sealing profile 1 is axisymmetric to a vertical central profile axis 11 in the cross-section on the profile base face 5 and on the longitudinal axis of the sealing profile 1 running in the longitudinal direction 12 (see FIG. 3). For their part, the anchoring feet are each axisymmetric to an axis 19 that is offset in parallel to the central profile axis 11.

[0051] The profile base 3 of the sealing profile 1 comprises rounded corners, i.e., the profile base flanks 7 merge with rounded portions 10 into the profile base face 5. As can also be clearly seen from FIG. 3, which shows a cross-section through the embodiment of a sealing profile 1 according to the invention shown in FIG. 2, the profile base flanks 7 in the cross-section in the direction of profile base face 5 run conically towards one another, i.e., they run, viewed in the cross-section, initially in an essentially straight line each to a lateral first transition point 16 closer to the central profile axis 11 on the profile base flank. They form an angle β with a vertical on the profile base face 5 in this linear area, which can be, for example, 5-10°. The rounded portions 10 run, in the cross-section of the sealing profile, from the first transition point 16 in a curved line to the central profile axis 11 perpendicular to the profile base face 5 and, at a second transition point 17, merge into the profile base face 5. In the area of rounded portions 10, in the cross-section in the direction of the profile base face 5, each of the points of the curved arc characterizing the rounded portions in the cross-section is closer to the central profile axis 11. The rounded portions 10 therefore do not jump forward laterally or in the direction of the central profile axis 11 compared to the profile body 2. At the second transition point 17, the rounded portions 10 merge into the profile base face 5, which extends in a straight line in the cross-section, apart from the area with the anchoring feet 9. The length of the curved arc of rounded portions 10 between the transition points 16, 17 is preferably in a relation to the length B of the profile base face 5, each considered in the cross-section, that a sufficiently large-dimensioned rounded portion 10 results. The rounded portions 10 are circular-arc-shaped in the embodiment shown here and the curved arc of the rounded portions 10 extends here over an angle α of about 80°. For example, for a profile with a profile base length B of 40 mm, a suitable circular-arc radius r may be 4 mm. The ratio of the length of the circular arc to the length B of the profile base face (related to a cross-section of the sealing profile, as shown, for example, in FIG. 3) is about 1:7.2. However, depending on the intended use, other embodiments are also possible.

[0052] The anchoring feet 9 are inwardly offset in the sealing profile 1 according to the invention in comparison with the sealing profile 101 shown in FIG. 1 from prior art, i.e., in the direction of central profile axis 11. They are each distanced from the second transition points 17, with which the rounded portions 10 of the sealing profile according to the invention 1 merge into the profile base face 5, in the direction of central profile axis 11. In addition, the anchoring feet 9 in this embodiment originate from an area of the profile base face 5, above which a solid bar 18 of elastomer material running vertically through the profile base 3 between hollow longitudinal channels is formed. The rounded corners and the inwardly offset anchoring feet 9 are particularly advantageous to avoid or reduce the spalling observed in sealing profiles 101 from prior art.

[0053] FIG. 4 shows by way of example a cross-section of a sealing profile 1 according to the invention with chamfers 21 instead of rounded portions. The chamfers 21, viewed in the cross-section of the sealing profile, run from the first transition point 16 in a polygonal line to the central profile axis 11 perpendicular to the profile base face 5 and merge into the profile base face 5 at the second transition point 17. The chamfers 21 do not protrude laterally from the profile body 2. Here is an example of a sealing profile 1 reproduced, which in this illustration in the cross-section on the left has a chamfer 21 from two individual chamfers, in the cross-section on the right a chamfer 21 from three individual chamfers. In the case of chamfer 21 shown here on the left side, the transition point 16 on the profile base flank 7 is connected to the transition point 17 on the profile base face 5 in the cross-section by a traverse of two linear lines, in the case of the chamfer shown on the right side, the transition points 16, 17 are connected by a traverse from three linear sections. It is possible that there are different embodiments of the corners in the sealing profile 1, for example a different number of chamfers, or on one side a chamfer and on the other side a rounded portion. However, it is preferable if both sides (viewed in the cross-section) are designed to be symmetric to one another.