DE8712323U1 - Sealing profile for segments of tunnel tubes - Google Patents

Description

937 PX .: «&iacgr; /%.". .«·.···! 22.6,1987

Sealing profile for segments of tunnel tubes

Description

The invention relates to a sealing profile according to the preamble of claim 1s

Such sealing profiles are known (DE-PS 28 33 345, j

DE-GM 85 02 036, DE^GM 85 21 068, DE-GM 85 32 264) And have proven themselves for tunnel construction when using segments (tubbings) made of concrete, cast iron, steel or reinforced concrete.

The essential requirements for such a profile are:

1. The forces to be overcome when screwing the segments together must be as low as possible.

2. Secure hold within the groove of the segments.

3. The highest possible contact tension and thus high sealing performance even if the profiles are not completely pressed together.

4. Stress relaxation as low as possible over the planned service life of the tunnel structure.

937px

22.6.1987

In recent years, the focus of development work and practical application has been on meeting requirements 1 and 2, which has led to the arrangement of grooves and channels in the profile cross-section in a special geometric arrangement, resulting in a very even distribution of stiffness across the width of the profile. Such profiles do not meet the increased requirements for the long-term sealing effect due to the contact stress being too low and the tendency to stress relaxation being too high, as the available reaction force when the profile is pressed together is divided by the entire contact width, thus achieving a low contact stress and also accelerating the stress relaxation due to the numerous channels.

The object of the invention is therefore to develop a sealing profile for tunnel tube sealing valves which satisfactorily meets requirements 1 and 2, in particular requirements 3 and 4, in order to reliably seal tunnels with a depth of more than 100 m in the long term. This object is achieved by a sealing profile with the characterizing features of claim 1.

The continuous web leads to a concentration of the reaction force generated when the profile is pressed onto this web, resulting in a concentration of stress and thus an increased sealing effect. In addition, the stress relaxation occurs to a much lesser extent with this web without hole weakening.

Appropriate embodiments are mentioned in the subclaims.

93?px

i > I I

> < t &igr;

22.6*1987

The invention will now be explained in more detail using embodiments with reference to scheme ¹ "! r. <; hen drawings* The

Fig-1, 2

Sealing profiles with the inventive web with a flat profile back and the

P-i &igr;

I= 3a; 3b; 4; 5

directional profiles with the web according to the invention; the profile back has one or more elevations*

All profiles are shown in cross-section and illustrate the not yet pressed state*

According to Fig. 1, the two segments (1) and (2) each have a groove (3) and (4). Two sealing profiles are glued into these grooves; when assembled, the profiles touch each other back to back, with the back of the profile being flat. Each of these profiles has four grooves (5) to (8) on the base side. The profile also has two channels (9) and (10) as well as a central, continuous and supporting web (11). The arrangement of four grooves creates two additional webs (12) and (13), the load-bearing capacity of which is reduced by the channels (9) and (10) arranged here in order to generate a stress peak in the central web (11). If the profiles are now pressed against one another by screwing the segments (1) and (2), the reaction force generated is concentrated in the solid, continuous webs (11), resulting in high contact stress and a sealing effect between the profiles.

937 Px " ·* .·*.?". .".'"I 22.6,1987

i I Ill I

!■ |&iacgr; Il 'ti' IHI ' Ii

Fig. 2 also shows a profile with a flat surface | Profile. Between the middle groove (14) and the two p

There is a continuous web (17) or (18) between the outer grooves (15) and (16). A uniform channel (19) or (20) is arranged above the two outer grooves (15) and (16), which extend into the corner area of the profile, with the center of the channels being at the same height as the upper edge of the middle groove (14).

According to Fig. 3a, there are two glued-in sealing profiles in the grooves (3) and (4) of the two segments (1) and (2). The back of the profiles has a raised area (21), which creates an uneven profile back. The height of the raised area is about 2.5 mm. The arrangement of the raised area further reduces the contact width of two opposing profiles, especially when unavoidable assembly inaccuracies lead to an offset of the two profile axes against each other. 9The profile according to Fig. 3a also has three uniform grooves (22), (23) and

(24) which are the same distance apart. There is a continuous web between the middle groove (23) and the two outer grooves (22) and (24)

(25) or (26). The elevation (21) in the profile back is arranged in the direction of the force acting on the two continuous webs (25) and (26). The rise (27) of the elevation (21) is approximately equal to the rise of the side flank (28). Between the outer seams (22) and (24) and the side There is a uniform channel (29) or (30) on each profile edge, with the center of the channel being at the height of the upper edge of the three grooves. If the profiles are now pressed against each other by screwing the segments (1) and (2), the reaction force generated is concentrated in the solid, continuous webs (25) and (26), resulting in a high level of contact and sealing effect between the profiles.

937 px · ·8 22.6.1987 !

If the profiles are offset (31) (Fig. 3b), the contact width is reduced and the tension is increased.

Fig. 4 shows the number and arrangement of the ] Grooves and channels of the same profile as in Fig. 3a, b

In addition to the central elevation (21a), the profile two more elevations (21b) and 21c) on the edges of the profile back. The elevations (21b) and (21c) have here the same angle of rise as the flanks (28). These edge elevations are also used for extreme offsets of the

Profiles achieve effective sealing.

Fig. 5 also shows a profile with an uneven profile back, which is formed by the elevation (32). The rise (33) of this elevation does not have the same angle of rise as the side flank (34). In contrast to the profile according to Fig. 3a, b, the elevation (32) is formed without transition, i.e. without the presence of an intermediate step. Between the middle groove (35) and the two outer grooves (36) and (37), whereby the middle groove is wider and deeper than the other two grooves, there is a continuous web (38) or (39). Above the outer grooves, this profile has a uniform channel (40) or (41) offset to the side.

All profiles consist of a rubber mixture based on polychloroprene, EPDM, nitrilotriacetic rubber or other types of rubber that are resistant to swelling, weathering and chemicals. The hardness in Shore A is usually between 35 and 80

Each segment (1) or (2) receives a suitable frame made of four joined sealing profiles, whereby the four frame corners of the seal are manufactured using the injection molding process. During this process, the caries are usually closed with conical plugs.

Claims (1)

Px .: .: .··..·*. .'·.···: 22.6.1937 ft * Sealing profile for segments of tunnel tubes Expectations 1) Sealing profile made of rubber or rubber-like material for segments provided with a circumferential recess which are assembled to form a tubular tunnel, whereby the profile a) a &igr; ■ the base side in longitudinal direction parallel
running grooves, b) angled side flanks and c) channels running parallel in the longitudinal direction characterized in that it has a central
Area (center) of the profile at least one
There is a continuous web whose load-bearing capacity is not impaired by a longitudinal channel. 2) Sealing profile according to claim 1, characterized in that around a continuous web (11) in the axis of symmetry by the arrangement of four uniform grooves
(5, 6, 7, 8) two further webs are formed, which in the
upper profile area through two uniform channels (9, 10) are reduced in their load-bearing capacity and that the profile I back is designed to be flat. till I Il »IM · IMI I ti Px . . ..2 ,,. 22.6.1987 3) Sealing profile according to claim 2, characterized in that the lower edge of the channels is above or at the same
Height as the upper edge of the grooves. 4) Sealing profile according to claim 1, characterized in that between the middle groove (14) and the two outer grooves (15, 16), the middle groove being deeper and
wider than the other two grooves, one each
continuous web (17, 18) is present, that a uniform channel (19, 20> is located above the outer grooves and that the profile back is flat. 5) Sealing profile according to claim 4, characterized in that the center of the channels is at the height of the upper edge of the middle groove. 6) Sealing profile according to claim 1, characterized in that the profile has at least one elevation in the profile back
having. 7) Di c'itungsprof i I according to claim 6, characterized in that that the profile has a single elevation (21, 32) in the profile back, the angle of rise of which is equal to or different from that of the lateral flanks (28, 34), the elevation arranged in the direction of force of the continuous web 8) Sealing profile according to claim 6, characterized in that the profile is provided with a raised surface (21a)
direction of force action of the continuous web, two further elevations (21b, 21c) at the edges
of the profile back, wherein the angle of rise of the elevations (21a, 21b, 21c) is equal to or different from the
the lateral flanks (28) is t * IfIl * ti >tif Il lift &bull; I 1(1*1 I I I * < * &igr;&igr; ti &igr; * &bull; 4 · ti ti * &bull; · * &igr;&igr; · i I f i .· * iii HH Il till M 937px »- /W'. ."."". 22.6*1987 9) Sealing plug I L according to claims 7 or 8 / characterized in that a continuous web is arranged distributed around the axis of symmetry of the profile / whereby the two webs are separated from one another by a groove. 10) Sealing profile according to claim 9, characterized in that the groove (23) which separates the two webs (25/26) from one another is uniform with the two outer grooves (22/24), with a uniform channel (29, 30) being located between the outer grooves and the lateral profile edges. 11) Sealing profile according to claim 10, characterized in that the center point of the channels is at the height of the upper edge of the grooves. 12) Sealing profile according to claim 9, characterized in that the groove (35) which separates the two webs (38, 39) from one another is wider and deeper than the two outer grooves (36/37), with a uniform channel (40, 41) being located laterally offset above the outer grooves.