EP4108881A1 - Angle du cuvelage en retrait - Google Patents

Angle du cuvelage en retrait Download PDF

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Publication number
EP4108881A1
EP4108881A1 EP22180208.5A EP22180208A EP4108881A1 EP 4108881 A1 EP4108881 A1 EP 4108881A1 EP 22180208 A EP22180208 A EP 22180208A EP 4108881 A1 EP4108881 A1 EP 4108881A1
Authority
EP
European Patent Office
Prior art keywords
anchoring
seal
corner
sealing
corner piece
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
EP22180208.5A
Other languages
German (de)
English (en)
Inventor
Heiko Höft
Frank Schlautmann
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Cts Cordes Tubes & Seals & Co Kg GmbH
Original Assignee
Cts Cordes Tubes & Seals & Co Kg GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Cts Cordes Tubes & Seals & Co Kg GmbH filed Critical Cts Cordes Tubes & Seals & Co Kg GmbH
Publication of EP4108881A1 publication Critical patent/EP4108881A1/fr
Pending legal-status Critical Current

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Classifications

    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
    • E21D11/00—Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
    • E21D11/38—Waterproofing; Heat insulating; Soundproofing; Electric insulating
    • E21D11/385—Sealing means positioned between adjacent lining members

Definitions

  • the invention relates to a seal that is intended for use in a tubbing, according to the features in the preamble of claim 1.
  • tubbings Prefabricated concrete segments, known as tubbings, are used to construct a tunnel structure, with each tubbing forming only a section of the tunnel structure, both in terms of length and circumference.
  • Several tubbings, which adjoin each other in terms of circumference, are assembled to form a complete ring. Rings placed next to one another in the axial direction then form a concrete tube, which represents the shell of a tunnel tube.
  • the individual tubbings usually have an essentially rectangular shape, which, however, is curved according to the diameter of the tunnel structure.
  • the segments At the peripheral narrow points where the segments connect to each other, the segments have a peripheral seal made of a rubber-elastic material in order to seal one segment in the longitudinal joint against the next segment of the same ring and in the ring joint against an adjacent ring.
  • a generic seal is from the DE 20 2017 103 363 U1 famous.
  • the seal is composed of a number of sealing profiles in the manner of a sealing frame, which has a hollow profile body which has cavities in cross section.
  • the sealing profiles are usually produced by extrusion, so that the cavities each extend over the length of a sealing profile.
  • the sealing profiles are at an angle deviating from 180° Angle aligned to each other, so that two ends of two sealing profiles are adjacent to each other in the area of a corner.
  • a seal regularly has four sealing profiles, which are aligned in such a way that two sealing profiles are aligned at an angle of essentially 90° to one another, forming a corner.
  • a sealing profile has an anchoring base on the hollow profile body, which is intended to engage in the concrete of a tubbing in order to anchor the seal preferably in a form-fitting manner in the tubbing, with an anchoring base being designed as an elongated anchoring web that runs in the longitudinal direction of the sealing profile.
  • the seal is usually already anchored during the manufacture of the tubbing, in that the seal is at least partially arranged in a casting mold during the casting of the tubbing and the anchoring foot is cast into the concrete material.
  • the geometry that is formed in the concrete segment by the shaping anchoring foot and surrounds an anchoring foot is referred to here as an anchoring groove, with the height of the anchoring foot defining the depth of engagement of the anchoring foot in the concrete and the depth of engagement being limited by the hollow profile body.
  • corner pieces are used, which can consist of a casting compound, for example, or are provided as a molded part. In any case, the corner pieces can have fewer cavities or no cavities at all in comparison to the sealing profiles.
  • one segment is placed next to another segment to create a ring, or one ring is placed behind another ring to create a tunnel section, and this is where the seals lie adjacent tubbings or the rings formed from the tubbings directly adjoin one another and are pressed against one another to achieve the desired tightness, as a result of which the seals are deformed.
  • forces are introduced into the tubbing that can exceed the strength of the concrete.
  • material failure for example in the form of cracking, spalling or the like, particularly near the corners, where the corner pieces with few or no cavities introduce the compression pressures to a high degree into the concrete material of the respective tubbing. It must be taken into account that the concrete close to the seal is already weakened by the anchoring grooves created in a segment due to the anchoring feet running there.
  • the present invention is based on the object of improving a generic seal such that the risk of material failure in a segment is reduced, specifically in the corner area of a segment, without making it difficult to connect two segments or reducing the performance of a seal.
  • the invention proposes reducing the forces acting on the concrete due to the sealing during the assembly of the tubbing segments, in that the anchoring foot is designed in the form of a notch, ending at the end of a sealing profile, in such a way that the height of the anchoring foot decreases towards the corner piece, so that the anchoring foot does not run around a corner.
  • the decrease is not abrupt, but runs at a notch angle that is flatter than 90° - in relation to the longitudinal axis of the sealing profile.
  • the depth of engagement of the anchoring foot in the concrete, which decreases towards the corner piece means that a shorter or flatter anchoring groove is created when a segment is cast.
  • the fact that an anchoring foot is phased out means that less sealing material presses on the concrete during installation and the associated deformation of the seal in the area of the notch.
  • the weakening of the concrete caused by the anchoring groove, particularly in the area of a corner can be reduced and the load-bearing capacity can thus be increased.
  • the formation of stress peaks can be reduced by a leaking anchor foot, since acting forces can be introduced largely over the entire surface of the seal into the concrete of a segment. As a result, the risk of material failure during the assembly of segments is significantly reduced, with no loss of sealing performance.
  • the pack size of the seal can be reduced according to the proposal, in an economically advantageous manner, since, for example, a sealing frame composed of sealing profiles can be deformed or folded more easily, particularly in the corner areas, so that the folded sealing frame requires a smaller transport or packaging volume or the like.
  • the notch angle is between 20° and 60°.
  • an effective contribution to increasing the load-bearing capacity of the concrete can be achieved within this angle spectrum, with the seal still being adequately held in the concrete of the segment.
  • the present invention is based on the consideration of counteracting the stress peaks caused in particular during the assembly of the segments, specifically by flattening the geometry of the seal or by creating flattened contour transitions. Therefore, in a further development, the transition from the exiting end of an anchoring foot to the hollow profile body of the sealing profile can be configured in a curved manner. But he can The radius of the arc is advantageously related to the notch angle, such that the smaller the notch angle, the greater the radius of the arc.
  • the radial transition counteracts tearing of the sealing profile, in particular tearing between the hollow profile body and the anchoring foot, and means that the seal is adequately held in the tubbing and remains in position when compressed, which ultimately ensures a high level of sealing.
  • the corner piece has two sections and that these sections adjoin one another at an angle deviating from 180°.
  • a tubbing is regularly designed to be rectangular, so that the two sections essentially adjoin one another at a right angle.
  • the two sections merge into one another in a radius, which reduces, for example, a notch effect acting on the corner piece through the concrete, so that, for example, less damage to the seal is to be feared and, as a result, adequate sealing performance can be ensured.
  • a sealing lip connects the two sections of the corner piece with one another, the sealing lip being arranged in such a way that it rests against the concrete of a tubbing in the corner area and runs curved between the sections to avoid the previously discussed risk to be able to counteract the formation of cracks in the seal or damage to the concrete of the segment.
  • the radius between the two sections forming the corner piece is smaller than the height of the anchoring foot, a radius corresponding to one third of the height of the anchoring foot being particularly advantageous.
  • the present sealing profiles are preferably extruded profiles which can be cut to any length, in particular corresponding to the length of the narrow sides of a tubbing.
  • the hollow profile body of the seal is shortened in such a way that the anchoring foot extends over the cut end of the connected hollow profile body and that a section of the corner piece adjoins the cut end of the hollow profile body in such a way that the anchoring foot rests on the section expires.
  • the anchoring foot In order to relieve a corner region in particular of greater stress, provision can be made for the anchoring foot to run out at a distance from the corner piece, for example at a distance of between 10 and 200 mm.
  • the distance thus defines a section of the hollow profile body which is designed to be free of anchoring feet.
  • the length of the gap is primarily related to the notch angle, such that it may be envisaged to increase the notch angle as the distance increases in order to shorten the notch and allow for adequate anchorage of the seal in the concrete.
  • Elastomers can preferably be provided for the seal in order, among other things, to be able to ensure sufficient deformability so that the seal is not damaged during assembly and the seal can also attach to uneven surfaces in order to achieve sufficient sealing performance.
  • the anchoring foot is designed to anchor the seal in the concrete of a tubbing.
  • the anchoring foot has a cross-section which causes positive anchoring in a surrounding material, specifically against pull-out forces acting on the hollow profile body.
  • a cross-sectional enlargement of the anchoring foot can be provided particularly advantageously, starting from the hollow profile body, so that the cross section is enlarged distally to the hollow profile body.
  • the designs known in practice can preferably be used for this purpose, for example a trapezoidal cross section or the like. Alternatively or additionally, provision can be made for a side line of the cross section to be curved.
  • the invention proposes a tubbing which is intended for the production of a tube of a tunnel structure.
  • a tubbing known per se has a proposed seal, which is held in a form-fitting manner via anchoring feet in an anchoring groove arranged in the peripheral narrow sides of a tubbing.
  • an anchoring base of the seal is designed in the form of a notch so that, for example, when casting a segment in the area of the notch, a flatter anchoring groove is created or a section is created in the concrete that has no anchoring groove.
  • the tubbing is stabilized, especially in a corner joint, i.e. in the area in which two ends of two narrow sides meet at an angle deviating from 180°, and less damage or the like is to be feared when assembling the tubbing.
  • Fig.1 shows a perspective view of a cross-sectional sealing profile 10 with a hollow profile body 11, which has cavities 12 extending in the longitudinal direction of the sealing profile 10, and with two anchoring feet 14, each of which is designed as an elongated anchoring web running in the longitudinal direction.
  • the anchoring feet 14 have a cross-section which, for example, enables form-fitting anchoring in the concrete of a tubbing against pull-out forces, in such a way that the cross-section of the anchoring foot 14 widens in the direction of the distal end 15 - starting from the hollow body profile 11, whereby in the present embodiment of the sealing profile 10 there is a trapezoidal configuration of the anchoring foot 14 .
  • the corner piece 21 has a corner anchorage 23 which adjoins the anchoring feet 14 of the sealing profiles 10 .
  • This design known from the prior art, causes high compressive forces during the assembly of tubbings, which are introduced into the concrete of the tubbing, the introduction being at least partially concentrated, so that stress peaks in the concrete cause damage such as cracking, spalling or the like.
  • a seal 1 is shown with two sealing profiles 10 which are aligned at an angle of essentially 90° to one another, so that two ends of the sealing profiles 10 are adjacent to one another in the area of a corner 20 and which adjoin a corner piece 21 .
  • the anchoring feet 14 are configured in the form of a notch 2 so that the height h of the anchoring feet 14 decreases toward the corner piece 21 .
  • the notch angle ⁇ is 55°.
  • the height h of the anchoring feet 14 decreases continuously.
  • the corner piece 21 has two sections 22 which adjoin one another at an angle of substantially 90°.
  • the two sections 22 merge into one another at a radius r, the radius r being one third of the height h of the anchoring feet 14 .
  • the anchoring feet 14 are designed to run out on the corner piece 21 .
  • the Notch 2 requires that the anchoring feet 14 are not designed to run around the corner area 20, so that the compressive forces acting on a corner area 20 during the assembly of tubbing segments are reduced and the risk of damage, crack formation or the like in the concrete can be reduced, which could affect the functionality could affect a tubbing.
  • FIG. 1 Another embodiment of a seal 1 shows 4 , wherein again a partial plan view of a corner area 20 is shown.
  • the anchoring feet 14 are in 4 not designed in such a way that they end on the corner piece 21. Instead, a section 111 of the hollow profile body 11 can be seen, which is designed without anchoring feet 14 . It can also be seen that the anchoring feet 14 run out at a distance from the corner piece 21 . In the present case, a relatively short spacing is shown to balance a reduced pressure load on a tubbing in the corner area 20 during assembly and a still sufficient, form-fitting anchoring of the seal 1 in the concrete.

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  • Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Mining & Mineral Resources (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Geology (AREA)
  • Lining And Supports For Tunnels (AREA)
EP22180208.5A 2021-06-21 2022-06-21 Angle du cuvelage en retrait Pending EP4108881A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE202021103313 2021-06-21

Publications (1)

Publication Number Publication Date
EP4108881A1 true EP4108881A1 (fr) 2022-12-28

Family

ID=82163576

Family Applications (1)

Application Number Title Priority Date Filing Date
EP22180208.5A Pending EP4108881A1 (fr) 2021-06-21 2022-06-21 Angle du cuvelage en retrait

Country Status (1)

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EP (1) EP4108881A1 (fr)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5660501A (en) * 1993-04-16 1997-08-26 Datwyler Ag Schweizerische Kabel-, Gummi-Und Kunstatoffwerke Corner area for tubbing seals
DE202017103363U1 (de) 2017-06-02 2017-08-01 CTS Cordes tubes & seals GmbH & Co. KG Dichtung eines Tunneltübbings
DE102018112777A1 (de) * 2018-05-29 2019-12-05 Ein Shemer Rubber Ltd. Eckverbindung eines Dichtungsrahmens
CN111749719A (zh) * 2020-06-28 2020-10-09 中铁第四勘察设计院集团有限公司 一种非直角防水密封垫转角结构
CN212837863U (zh) * 2020-08-05 2021-03-30 上海隧道工程有限公司 预埋式管片角部密封垫

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5660501A (en) * 1993-04-16 1997-08-26 Datwyler Ag Schweizerische Kabel-, Gummi-Und Kunstatoffwerke Corner area for tubbing seals
DE202017103363U1 (de) 2017-06-02 2017-08-01 CTS Cordes tubes & seals GmbH & Co. KG Dichtung eines Tunneltübbings
DE102018112777A1 (de) * 2018-05-29 2019-12-05 Ein Shemer Rubber Ltd. Eckverbindung eines Dichtungsrahmens
CN111749719A (zh) * 2020-06-28 2020-10-09 中铁第四勘察设计院集团有限公司 一种非直角防水密封垫转角结构
CN212837863U (zh) * 2020-08-05 2021-03-30 上海隧道工程有限公司 预埋式管片角部密封垫

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