EP0453521B1 - Hollow-section sealing strip made of elastic for sealing arched tunnel roofs - Google Patents

Hollow-section sealing strip made of elastic for sealing arched tunnel roofs Download PDF

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Publication number
EP0453521B1
EP0453521B1 EP90912259A EP90912259A EP0453521B1 EP 0453521 B1 EP0453521 B1 EP 0453521B1 EP 90912259 A EP90912259 A EP 90912259A EP 90912259 A EP90912259 A EP 90912259A EP 0453521 B1 EP0453521 B1 EP 0453521B1
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EP
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Prior art keywords
section
channels
cross
sections
sealing strip
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EP90912259A
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German (de)
French (fr)
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EP0453521A1 (en
Inventor
Norbert Herwegh
Max Eigenheer
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Daetwyler AG Schweizerische Kabel Gummi und Kunststoffwerke
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Daetwyler AG Schweizerische Kabel Gummi und Kunststoffwerke
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    • 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
    • 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
    • E21D11/388—Sealing means positioned between adjacent lining members having longitudinal cavities communicating with the exterior on the outer side of the lining elements

Definitions

  • the invention relates to a sealing profile strip made of elastic material for the sealing of tunnel vaults, with a cross-section essentially forming a hexagon, which has two long sides, one of which for resting the profile bar in a recess of a tunnel vault element and the other for contact with an identical long side a further, identical profile strip is determined in an adjacent tunnel vault element, with a plurality of grooves 8 open towards the latter and a series of channels horizontally offset to these grooves being arranged along the first longitudinal side.
  • tubbings are often used for lining tunnel vaults, rectangular or square plates made of concrete, which are mainly arranged on the vault apex. In its narrow sides there are depressions in which sealing profile strips are embedded, which come to lie on one another under pressure. Its purpose is to prevent water from entering the tunnel. To achieve this, the profile strips must meet certain requirements and are therefore trained accordingly.
  • the cross section of such profile strips forms a narrow hexagon, two of the six sides being considerably longer than the others. With one side of each profile bar lies on the bottom of the recess of the tubbing, with the other it lies against the corresponding side of the opposite profile bar.
  • the cross section shows several grooves on the first long side mentioned, which are open towards this, as well as several closed, mostly in cross section circular channels, as can be seen, for example, from GB-A-2 210 117. However, these channels are not always present, as EP-A-0 306 581 shows; only the grooves are made there.
  • the water pressure can work particularly well, especially for the profile bar that has been partially exposed by the offset.
  • the contact pressure is constant over the remaining part of the long sides due to the lack of channels in the profile strips according to EP-A-0 306 581, a slight weak point or defect in one of the sides, which originates from the manufacture, is sufficient to prevent this Allow water to penetrate there, after which time it can separate the two contact points.
  • the ends of the contact sides must be designed in such a way that there is a particularly high pressure on the opposite contact side. This then decreases with the offset, but is still large enough to avoid separating the contact sides.
  • GB-A-2 210 117 shows such a configuration of the contact sides.
  • the two contact surfaces are concave, so that only the ends mentioned lie on one another.
  • these ends lie on special projections which protrude from the adjacent oblique side of the hexagon. On however, this affects the water pressure over its entire round surface, so that the contact pressure is negatively affected.
  • the other embodiment is better, in which the corner regions of the profile cross section support the ends mentioned.
  • sticking to a circular cross section of the channels prevents optimal material concentration. With circular channels, the material cross-section varies from one place to another and can therefore not be influenced in the desired way.
  • the sealing profile strip according to the invention avoids these disadvantages. It ensures that the ends mentioned are optimally supported by a suitable material cross-section at those points. However, it also takes account of the offset, in that in such a case the section of the contact side lying between the ends is also supported by suitable material cross sections in order to maintain a perfect seal there with one end of the opposite contact side. All of this requires a departure from the traditional circular cross-section of the channels, which, moreover, is necessary in order to be able to absorb the elastic deformation of the profile strips during and after assembly.
  • Such a sealing profile strip is characterized according to the invention by the features of claim 1.
  • the upper end of the profile strip in the figure is thus the one on which the pressure of the water present in the rock or soil acts and whose penetration into the tunnel must be prevented, while the lower end is directed towards the tunnel bore and is consequently not exposed to any water pressure , a fact that still has to be considered.
  • a further profile strip 3 'in a segment 1' is shown in dashed lines, which is arranged in mirror image to the first; for reasons of clarity, however, it is drawn at a certain distance from it, which is not the case, since the two profiled strips must lie against one another under pressure in order to be able to seal.
  • their opposite sides are deformed and compressed in the corners, as will be explained later.
  • the usual cross-sectional shape of such sealing profile strips used for tunnel construction is, as can be seen, approximately a hexagon, two sides, namely sides 4 and 5, being substantially longer than the others and running parallel to one another.
  • the side 4 lies in the recess 2, while the opposite side 5 serves to interact with the corresponding side 5 'of the opposite profile strip by mutual contact. It should therefore be referred to below as the contact page.
  • a side 6 or 7 adjoins the side 5 at each end.
  • portal-like grooves 8 are arranged in the cross section of the profile strip. They all have the same shape and size and are open towards side 4. Viewed from the side 4 or from the recess 2, there is a series of closed cavities or channels 9, 10 above these grooves 8.
  • the outer channels 9 have a kind of trapezoidal shape, but the smaller of the two parallel sides is replaced by an arc piece 91 of a small radius and the larger side, the base, by an arc piece 92 of a larger radius than that of the arc piece 91.
  • the two straight sections 93, 94 converge towards the contact side 5; these sections are preferably rectilinear.
  • the adjacent channels 10 have arisen from a circular shape, but part of this circumference has been replaced by a straight section 101.
  • This section together with the section 94 of the adjacent outer channel 9 adjacent to it, to which it runs at an angle, forms a wedge-shaped widening upwards and mainly delimited by the contact side 5, i.e. a part of the total cross section in which the material the sealing profile strip is particularly concentrated, and which therefore also has a relatively high compressive strength or deformation rigidity. Such a part is present at each end, as can be seen from the figure.
  • each outer channel 9 which delimits the outside thereof, also forms the delimitation of a corner region 13, which is further defined by the side 6 or 7 and an extension 12 of the contact side 5 Page 6 or 7 and the corresponding section 93 parallel to each other, which means at the same time that the latter must be straight in this case. Due to the parallelism of the two limitations mentioned, the wall thickness of the corner region 13 remains constant in this section, which contributes to its strength. This strength against the action of pressure when the two profile strips 3, 3 'lie one on top of the other is further increased by the extensions 12 already mentioned at the two ends of the rectilinear contact sides 5.
  • each of the extensions 12 extends at a slight angle to the contact side 5 such that, if one looks at the entire cross section from the side 4, they can be described as rising outwards.
  • a corner 14 is formed which protrudes the furthest with respect to the entire cross section of the profiled strip 3 and at the same time slightly enlarges the corner region 13. Since the opposite profile strip 3 'of course has the same corners, they touch first when installing the segments 1, 1', and the corner regions 13 are thereby compressed. The back pressure that arises in this way then ensures that where the two corners meet, there is sufficient tightness that prevents any ingress of water.
  • a bore 15 drawn in broken lines in the figure is therefore provided, which only has the upper outer channel 9 and the groove 8 adjacent to it, if need be also the channel 10 directly adjacent to the first-mentioned channel; connects with the side 6 of the bar and opens out there; thus only those cavities receive the full water pressure in which the surrounding material of the profile strip 3 is supported with certainty by the opposite profile strip 3 '.
  • normal air pressure still prevails in the lower cavities, which is essentially the same as the pressure in the gap below the profile strip. Pressing out the bar can thus be avoided.
  • the distances between the channels 9 and 10 are between them, i.e. the distance between the two closest points on the circumference of two adjacent channels is essentially the same everywhere. This applies not only between the channels 9 and 10, but also between the two channels 10 shown here among themselves, and would also be used if additional channels were possibly present between these channels 10.
  • a coating or sealant 16 is advantageously applied in the recess 2 before insertion.
  • This sealing compound the so-called primer, is intended to prevent water from seeping down between the tubbing and the relevant sealing profile strip.
  • this mass can be carried out as a two-component paint, i.e. an adhesive is added to it, which then securely holds the profile strip in the recess 2.

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  • Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Mining & Mineral Resources (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Civil Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Architecture (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Geology (AREA)
  • Lining And Supports For Tunnels (AREA)
  • Auxiliary Devices For And Details Of Packaging Control (AREA)
  • Absorbent Articles And Supports Therefor (AREA)
  • Ceramic Products (AREA)
  • Sealing Material Composition (AREA)
  • Gasket Seals (AREA)

Abstract

The hollow-section sealing strip of the invention has, viewed in cross-section, a number of identical grooves (8) and a row of channels (9, 10). The channels have different cross-sections, however. The outer channels (9) are basically conical in cross-section with a rounded vertex (91) and a curved base (92). The inner channels (10) are basically circular, part of the circle being formed by a straight line (101). In addition, the side (5) of the hollow-section strip designed to make contact with another, identical strip has two outwards-sloping surfaces (12) forming protruding corners (14). These specially shaped cross-sections produce particularly pressure-resistant sections (11) between the channels (9, 10) in the interior of the strip and strong corner zones (13) between the outer channels (9) and the strip edges (6) adjacent to them, thus giving a particularly effective sealing action against penetrating water.

Description

Die Erfindung betrifft eine Dichtungsprofilleiste aus elastischem Material für die Abdichtung von Tunnelgewölben, mit einem im wesentlichen ein Sechseck bildenden Querschnitt, der zwei Längsseiten aufweist, von denen die eine zum Aufliegen der Profilleiste in einer Vertiefung eines Tunnelgewölbeelementes und die andere zum Kontakt mit einer identischen Längsseite einer weiteren, gleichen Profilleiste in einem angrenzenden Tunnelgewölbeelement bestimmt ist, wobei entlang der erstgenannten Längsseite mehrere gegen diese hin offene Nuten 8 und oberhalb derselben eine Reihe von horizontal zu diesen Nuten versetzten Kanälen angeordnet sind.The invention relates to a sealing profile strip made of elastic material for the sealing of tunnel vaults, with a cross-section essentially forming a hexagon, which has two long sides, one of which for resting the profile bar in a recess of a tunnel vault element and the other for contact with an identical long side a further, identical profile strip is determined in an adjacent tunnel vault element, with a plurality of grooves 8 open towards the latter and a series of channels horizontally offset to these grooves being arranged along the first longitudinal side.

Für die Auskleidung von Tunnelgewölben werden öfters sogenannte Tübbinge verwendet, rechteckige oder quadratische Platten aus Beton, die vor allem am Gewölbescheitel angeordnet sind. In ihren Schmalseiten sind Vertiefungen vorhanden, in welchen Dichtungsprofilstreifen eingelassen sind, die unter Druck aufeinander zu liegen kommen. Ihr Zweck ist es, Wasser am Eindringen in den Tunnel zu hindern. Um dies zu erreichen, müssen die Profilleisten gewissen Anforderungen genügen und werden daher entsprechend ausgebildet.So-called tubbings are often used for lining tunnel vaults, rectangular or square plates made of concrete, which are mainly arranged on the vault apex. In its narrow sides there are depressions in which sealing profile strips are embedded, which come to lie on one another under pressure. Its purpose is to prevent water from entering the tunnel. To achieve this, the profile strips must meet certain requirements and are therefore trained accordingly.

In der Regel bildet der Querschnitt solcher Profilleisten ein schmales Sechseck, wobei zwei der sechs Seiten wesentlich länger sind als die anderen. Mit der einen Seite liegt jede Profilleiste am Boden der Vertiefung des Tübbings auf, mit der andern legt sie sich gegen die entsprechende Seite der gegenüberliegenden Profilleiste an. Der Querschnitt zeigt mehrere Nuten an der zuerst genannten langen Seite, die gegen diese hin offen sind, sowie ebenfalls mehrere geschlossene, im Querschnitt meist kreisrunde Kanäle, wie z.B. aus der GB-A-2 210 117 ersichtlich. Diese Kanäle sind jedoch nicht immer vorhanden, wie die EP-A-0 306 581 zeigt; dort sind lediglich die Nuten angebracht. Damit erhält man zwar auf der den Nuten gegenüberliegenden Längsseite des Sechsecks, die zur Anlage an eine gleiche Seite einer spiegelbildlich angeordneten sechseckigen Dichtungsprofilleiste und damit zur Dichtung dient, einen entlang dieser Seite annähernd konstanten Anpressdruck. Solange diese beiden Seiten über ihre ganze Länge ausreichend aufeinanderliegen, funktioniert die Abdichtung im wesentlichen, sofern der auf die beiden Leisten wirkende Wasserdruck nicht zu gross ist. Nun kommt es aber öfters vor, dass infolge von Abmessungsunterschieden der Elemente, von Toleranzen bei der Montage oder in der Tunnelgeometrie sowie von Unterschieden im Druck des den Tunnel umgebenden Geländes, des Bergdruckes, mit der Zeit eine Relativverschiebung der beiden Profilleisten zueinander auftritt, der sogenannte Versatz. Dadurch entsteht angrenzend an die beiden Kontaktseiten ein keilförmiger Bereich am wasserseitigen Ende der Profilleisten. Dort kann der Wasserdruck besonders gut wirken, namentlich bei derjenigen Profilleiste, die durch den Versatz teilweise freigelegt worden ist. Ist jedoch der Kontaktdruck infolge des Fehlens von Kanälen bei den Profilleisten nach EP-A-0 306 581 wie erwähnt über den noch verbleibenden Teil der Längsseiten konstant, genügt eine geringe, aus der Fabrikation stammende Schwach- oder Defektstelle an einer der Seiten, um das Wasser dort eindringen zu lassen, worauf es mit der Zeit die beiden Kontaktstellen voneinander trennen kann. Um dies zu vermeiden, müssen vor allem die Enden der Kontaktseiten so ausgebildet werden, dass dort ein besonders hoher Druck auf die jeweils gegenüberliegende Kontaktseite vorhanden ist. Dieser nimmt dann zwar beim Versatz ab, ist aber immer noch gross genug, um ein Voneinandertrennen der Kontaktseiten zu vermeiden. Eine solche Ausbildung der Kontaktseiten zeigt die GB-A-2 210 117. Die beiden Kontaktflächen sind konkav, sodass nur die genannten Enden aufeinander aufliegen. Bei der einen Ausführungsform liegen diese Enden auf speziellen Vorsprüngen, die aus der angrenzenden Schrägseite des Sechseckes herausragen. Auf diese wirkt aber der Wasserdruck über ihre ganze runde Oberfläche, sodass der Anpressdruck negativ beeinflusst wird. Besser ist die andere Ausführungsform, bei welcher die Eckbereiche des Profilquerschnittes die genannten Enden stützen. Allerdings verhindert das Festhalten an einem kreisrunden Querschnitt der Kanäle eine optimale Materialkonzentration. Mit kreisrunden Kanälen variiert der Materialquerschnitt von einer Stelle zur andern und kann daher nicht im gewünschten Sinne beeinflusst werden.As a rule, the cross section of such profile strips forms a narrow hexagon, two of the six sides being considerably longer than the others. With one side of each profile bar lies on the bottom of the recess of the tubbing, with the other it lies against the corresponding side of the opposite profile bar. The cross section shows several grooves on the first long side mentioned, which are open towards this, as well as several closed, mostly in cross section circular channels, as can be seen, for example, from GB-A-2 210 117. However, these channels are not always present, as EP-A-0 306 581 shows; only the grooves are made there. Thus, on the longitudinal side of the hexagon opposite the grooves, which is used for bearing against a same side of a mirror-image arranged hexagonal sealing profile strip and thus for sealing, an approximately constant contact pressure is obtained along this side. As long as these two sides lie sufficiently on each other over their entire length, the sealing works essentially, provided the water pressure acting on the two strips is not too great. Now, however, it often happens that due to differences in the dimensions of the elements, tolerances during assembly or in the tunnel geometry, as well as differences in the pressure of the terrain surrounding the tunnel, the mountain pressure, a relative displacement of the two profile strips occurs over time, the so-called Offset. This creates a wedge-shaped area adjacent to the two contact sides at the water-side end of the profile strips. There, the water pressure can work particularly well, especially for the profile bar that has been partially exposed by the offset. However, if, as mentioned, the contact pressure is constant over the remaining part of the long sides due to the lack of channels in the profile strips according to EP-A-0 306 581, a slight weak point or defect in one of the sides, which originates from the manufacture, is sufficient to prevent this Allow water to penetrate there, after which time it can separate the two contact points. In order to avoid this, the ends of the contact sides must be designed in such a way that there is a particularly high pressure on the opposite contact side. This then decreases with the offset, but is still large enough to avoid separating the contact sides. GB-A-2 210 117 shows such a configuration of the contact sides. The two contact surfaces are concave, so that only the ends mentioned lie on one another. In one embodiment, these ends lie on special projections which protrude from the adjacent oblique side of the hexagon. On however, this affects the water pressure over its entire round surface, so that the contact pressure is negatively affected. The other embodiment is better, in which the corner regions of the profile cross section support the ends mentioned. However, sticking to a circular cross section of the channels prevents optimal material concentration. With circular channels, the material cross-section varies from one place to another and can therefore not be influenced in the desired way.

Die erfindungsgemässe Dichtungsprofilleiste vermeidet diese Nachteile. Sie sorgt dafür, dass die genannten Enden optimal durch einen geeigneten Materialquerschnitt an jenen Stellen unterstützt sind. Sie nimmt aber auch Rücksicht auf den Versatz, indem in einem solchen Fall auch der zwischen den Enden liegende Abschnitt der Kontaktseite durch geeignete Materialquerschnitte gestützt ist, um mit dem einen Ende der gegenüberliegenden Kontaktseite dort eine einwandfreie Dichtung aufrecht zu erhalten. Dies alles bedingt eine Abkehr vom traditionellen kreisrunden Querschnitt der Kanäle, die im übrigen schon deswegen notwendig ist, um die elastische Deformation der Profilleisten bei und nach der Montage aufnehmen zu können.The sealing profile strip according to the invention avoids these disadvantages. It ensures that the ends mentioned are optimally supported by a suitable material cross-section at those points. However, it also takes account of the offset, in that in such a case the section of the contact side lying between the ends is also supported by suitable material cross sections in order to maintain a perfect seal there with one end of the opposite contact side. All of this requires a departure from the traditional circular cross-section of the channels, which, moreover, is necessary in order to be able to absorb the elastic deformation of the profile strips during and after assembly.

Eine solche Dichtungsprofilleiste ist erfindungsgemäss durch die Merkmale des Anspruches 1 gekennzeichnet.Such a sealing profile strip is characterized according to the invention by the features of claim 1.

Weitere, jedoch fakultative Merkmale folgen aus der nachfolgenden Beschreibung eines in der einzigen Figur dargestellten Ausführungsbeispieles.Further, but optional features follow from the following description of an embodiment shown in the single figure.

In dieser ist ein Tübbing 1 mit seiner in einer Vertiefung 2 angeordneten Dichtungsprofilleiste 3 in derjenigen Lage dargestellt, wie er im Tunnelgewölbe montiert ist. Das in der Figur obere Ende der Profilleiste ist also dasjenige, auf welches der Druck des im Gestein oder Erdreich vorhandenen Wassers wirkt und dessen Eindringen in den Tunnel verhindert werden muss, während das untere Ende gegen die Tunnelbohrung hin gerichtet ist und demzufolge keinem Wasserdruck ausgesetzt ist, ein Umstand, der noch zu beachten ist. Um die Dichtwirkung der Profilleiste besser darzustellen, ist gestrichelt eine weitere Profilleiste 3' in einem Tübbing 1' dargestellt, die spiegelbildlich zur ersten angeordnet ist; sie ist jedoch aus Gründen der Uebersichtlichkeit in einem gewissen Abstand von derselben gezeichnet, was nicht zutrifft, denn die beiden Profilleisten müssen unter Druck gegeneinander anliegen, um abdichten zu können. Hierbei werden ihre gegeneinanderliegenden Seiten vor allem in den Ecken deformiert und dabei komprimiert, wie später noch erläutert wird.This shows a tubbing 1 with its sealing profile strip 3 arranged in a recess 2 in the position in which it is mounted in the tunnel vault. The upper end of the profile strip in the figure is thus the one on which the pressure of the water present in the rock or soil acts and whose penetration into the tunnel must be prevented, while the lower end is directed towards the tunnel bore and is consequently not exposed to any water pressure , a fact that still has to be considered. In order to better illustrate the sealing effect of the profile strip, a further profile strip 3 'in a segment 1' is shown in dashed lines, which is arranged in mirror image to the first; for reasons of clarity, however, it is drawn at a certain distance from it, which is not the case, since the two profiled strips must lie against one another under pressure in order to be able to seal. Here, their opposite sides are deformed and compressed in the corners, as will be explained later.

Die übliche Querschnittsform solcher für den Tunnelbau verwendeten Dichtungsprofilleisten ist wie ersichtlich annähernd ein Sechseck, wobei zwei Seiten, nämlich die Seiten 4 und 5, wesentlich länger als die andern sind und parallel zueinander verlaufen. Die Seite 4 liegt dabei in der Vertiefung 2, während die gegenüberliegende Seite 5 dazu dient, mit der entsprechenden Seite 5' der gegenüberliegenden Profilleiste durch gegenseitige Berührung zusammenzuwirken. Sie soll daher im folgenden als Kontaktseite bezeichnet werden. An die Seite 5 grenzt an jedem Ende eine Seite 6 bzw. 7 an. Bei den üblichen Profilleisten dieser Art ist der jeweilige Uebergang zur Kontaktseite 5 stark abgerundet, wie durch die gestrichelt eingezeichneten Linien 6', 7' dargestellt; auch ergibt sich, dass jene Seiten stärker geneigt sind als bei dieser erfindungsgemässen Profilleiste.The usual cross-sectional shape of such sealing profile strips used for tunnel construction is, as can be seen, approximately a hexagon, two sides, namely sides 4 and 5, being substantially longer than the others and running parallel to one another. The side 4 lies in the recess 2, while the opposite side 5 serves to interact with the corresponding side 5 'of the opposite profile strip by mutual contact. It should therefore be referred to below as the contact page. A side 6 or 7 adjoins the side 5 at each end. With the usual profile strips of this type, the respective transition to the contact side 5 strongly rounded, as shown by the dashed lines 6 ', 7'; it also results that those sides are more inclined than in this profile strip according to the invention.

Im Querschnitt der Profilleiste sind mehrere, meist drei, portalartige Nuten 8 angeordnet. Sie haben alle dieselbe Form und Grösse und sind gegen die Seite 4 hin offen. Von der Seite 4 bzw. von der Vertiefung 2 her betrachtet liegt oberhalb dieser Nuten 8 eine Reihe von geschlossenen Hohlräumen oder Kanälen 9, 10. Sie liegen nicht genau über den Nuten, sondern seitlich versetzt dazu. Im vorliegenden Ausführungsbeispiel sind es zwei äussere Kanäle 9 und zwei innere Kanäle 10. Ihre Querschnittsformen sind unterschiedlich und entsprechen aus noch zu erläuternden Gründen nicht mehr der kreisrunden Form der Kanäle in den bisher bekannten Profilleisten. Die äusseren Kanäle 9 weisen eine Art Trapezform auf, wobei aber die kleinere der beiden parallelen Seiten durch ein Bogenstück 91 von kleinem Radius und die grössere Seite, die Basis, durch ein Bogenstück 92 von grösserem Radius als derjenige des Bogenstücks 91 ersetzt sind. Die beiden geraden Abschnitte 93, 94, laufen gegen die Kontaktseite 5 hin zusammen; vorzugsweise sind diese Abschnitte geradlinig. Die benachbarten Kanäle 10 sind aus einer Kreisform heraus entstanden, wobei aber ein Teil dieses Kreisumfanges durch einen geraden Abschnitt 101 ersetzt ist. Dieser Abschnitt bildet mit dem ihm benachbarten Abschnitt 94 des danebenliegenden äusseren Kanals 9, zu welchem er unter einem Winkel verläuft, einen keilförmig sich nach oben erweiternden und zur Hauptsache von der Kontaktseite 5 begrenzten Materialabschnitt 11, also einen Teil des Gesamtquerschnittes, in welchem das Material der Dichtungsprofilleiste besonders konzentriert ist,und der dadurch auch eine relativ grosse Druckfestigkeit bzw. Verformungssteifigkeit aufweist. An jedem Ende ist ein solcher Teil vorhanden, wie aus der Figur ersichtlich.Several, usually three, portal-like grooves 8 are arranged in the cross section of the profile strip. They all have the same shape and size and are open towards side 4. Viewed from the side 4 or from the recess 2, there is a series of closed cavities or channels 9, 10 above these grooves 8. In the present exemplary embodiment, there are two outer channels 9 and two inner channels 10. Their cross-sectional shapes are different and, for reasons to be explained, no longer correspond to the circular shape of the channels in the previously known profile strips. The outer channels 9 have a kind of trapezoidal shape, but the smaller of the two parallel sides is replaced by an arc piece 91 of a small radius and the larger side, the base, by an arc piece 92 of a larger radius than that of the arc piece 91. The two straight sections 93, 94 converge towards the contact side 5; these sections are preferably rectilinear. The adjacent channels 10 have arisen from a circular shape, but part of this circumference has been replaced by a straight section 101. This section, together with the section 94 of the adjacent outer channel 9 adjacent to it, to which it runs at an angle, forms a wedge-shaped widening upwards and mainly delimited by the contact side 5, i.e. a part of the total cross section in which the material the sealing profile strip is particularly concentrated, and which therefore also has a relatively high compressive strength or deformation rigidity. Such a part is present at each end, as can be seen from the figure.

Der Abschnitt 93 jedes äusseren Kanals 9, der dessen Aussenseite begrenzt, bildet auch die Begrenzung eines im weiteren von der Seite 6 bzw. 7 und einer Verlängerung 12 der Kontaktseite 5 definierten Eckbereiches 13. Zweckmässigerweise verlaufen die Seite 6 bzw. 7 und der entsprechende Abschnitt 93 zueinander parallel, was gleichzeitig bedeutet, dass der letztere in diesem Fall geradlinig sein muss. Durch die Parallelität der beiden genannten Begrenzungen bleibt die Wandstärke des Eckbereiches 13 in diesem Teilabschnitt konstant, was zu seiner Festigkeit beiträgt. Diese Festigkeit gegen Druckeinwirkung beim Aufeinanderliegen der beiden Profilleisten 3, 3' wird durch die schon erwähnten Verlängerungen 12 an den beiden Enden der geradlinig verlaufenden Kontaktseiten 5 noch weiter erhöht. Wie ersichtlich, verläuft jede der Verlängerungen 12 unter einem geringen Winkel zur Kontaktseite 5 derart, dass man sie, wenn man den ganzen Querschnitt von der Seite 4 her betrachtet, als nach aussen ansteigend bezeichnen kann. Im Schnittpunkt jeder Verlängerung 12 mit der entsprechenden Seite 6 bzw. 7 ist eine Ecke 14 ausgebildet, die bezüglich des ganzen Querschnittes der Profilleiste 3 am weitesten vorsteht und gleichzeitig den Eckbereich 13 etwas vergrössert. Da die gegenüberliegende Profilleiste 3' natürlich die gleichen Ecken aufweist, berühren sich diese bei der Montage der Tübbinge 1, 1' zuerst, und dadurch werden die Eckbereiche 13 komprimiert. Der solcherarts entstehende Gegendruck sorgt dann dafür, dass dort, wo die beiden Ecken aufeinandertreffen, eine ausreichende Dichtigkeit besteht, die jedes Eindringen von Wasser verhindert. Dies trifft natürlich vor allem für die in der Figur dargestellte Relativlage der beiden Profilleisten 3, 3' zu. Aber auch dann, wenn infolge des Bergdruckes oder anderer Umstände der zu Beginn erwähnte Versatz auftritt, sich also beispielsweise die Profilleiste 3' zur Profilleiste 3 nach unten verschiebt, ist die Dichtung immer noch gut, weil die vorspringende Ecke 14 am unteren Ende der Profilleiste 3 sowie die nicht bezeichnete obere Ecke der Profilleiste 3' sich in die entsprechende Verlängerungen 12 der jeweils andern Leiste hineindrucken, bei sehr grossem Versatz sogar in die eigentliche Kontaktseite 5 selber. Dadurch ist es nicht möglich, dass der Wasserdruck die beiden Profilleisten 3, 3' auseinandertreiben kann, wie dies bei den herkömmlichen Profilleisten der Fall ist.The section 93 of each outer channel 9, which delimits the outside thereof, also forms the delimitation of a corner region 13, which is further defined by the side 6 or 7 and an extension 12 of the contact side 5 Page 6 or 7 and the corresponding section 93 parallel to each other, which means at the same time that the latter must be straight in this case. Due to the parallelism of the two limitations mentioned, the wall thickness of the corner region 13 remains constant in this section, which contributes to its strength. This strength against the action of pressure when the two profile strips 3, 3 'lie one on top of the other is further increased by the extensions 12 already mentioned at the two ends of the rectilinear contact sides 5. As can be seen, each of the extensions 12 extends at a slight angle to the contact side 5 such that, if one looks at the entire cross section from the side 4, they can be described as rising outwards. At the intersection of each extension 12 with the corresponding side 6 or 7, a corner 14 is formed which protrudes the furthest with respect to the entire cross section of the profiled strip 3 and at the same time slightly enlarges the corner region 13. Since the opposite profile strip 3 'of course has the same corners, they touch first when installing the segments 1, 1', and the corner regions 13 are thereby compressed. The back pressure that arises in this way then ensures that where the two corners meet, there is sufficient tightness that prevents any ingress of water. Of course, this applies above all to the relative position of the two profile strips 3, 3 'shown in the figure. But even if, due to the mountain pressure or other circumstances, the offset mentioned at the beginning occurs, for example the profile strip 3 'moves down to the profile strip 3, the seal is still good because the projecting corner 14 at the lower end of the profile strip 3 as well as the unmarked upper corner of the profile strip 3 'are pressed into the corresponding extensions 12 of the other strip, with a very large offset even into the actual contact side 5 itself. As a result, it is not possible for the water pressure to drive the two profile strips 3, 3 'apart, as is the case with the conventional profile strips.

Zwar hat man bei jenen schon versucht, den Dichtdruck indirekt dadurch zu erhöhen, dass man sowohl die Nuten 8 als auch die Kanäle 9, 10 an einer Stelle entlang ihrer (zur Ebene der Figur senkrechten) Längsachsen mittels einer Bohrung mit der Druckwasserseite der Profilleiste, in der Figur also mit dem oberen Ende, verband. Dadurch herrschte nun in diesen Hohlräumen 8, 9 und 10 der gleiche Druck wie aussen, während vorher ein geringer Druck vorhanden war, der ein, wenn auch geringfügiges, Zusammendrücken jedes Hohlraumes erlaubte. Durch diese Deformation nahm auch der Dichtdruck zwischen den Kontaktseiten 5, 5' ab, was das Eindringen von Wasser erleichterte. Der Hauptnachteil war jedoch der folgende. Wenn nämlich die beiden Profilleisten gegeneinander versetzt waren, dann herrschte in den unteren, also der Tunnelbohrung zunächst liegenden Nuten und Kanäle ebenfalls der hohe Wasserdruck. Bei der nunmehr weiter unten liegenden Profilleiste, deren unterster Teil nicht mehr an der anderen, weiter oben liegenden Leiste aufliegen konnte, war dieser Wasserdruck somit höher als der Luftdruck im darunterliegenden Spalt zwischen den beiden Tübbingen 1, 1'. Es bestand also die Gefahr, dass die weiter unten liegende Profilleiste durch ihren eigenen Innendruck aus der Vertiefung 2 herausgepresst werden konnte.Attempts have already been made to increase the sealing pressure indirectly by having both the grooves 8 and the channels 9, 10 at one point along their longitudinal axes (perpendicular to the plane of the figure) by means of a bore with the pressurized water side of the profile strip, in the figure with the upper end. As a result, the same pressure prevailed in these cavities 8, 9 and 10 as there was outside, whereas previously there was a slight pressure which allowed each cavity to be compressed, albeit slightly. This deformation also reduced the sealing pressure between the contact sides 5, 5 ', which made it easier for water to penetrate. The main disadvantage, however, was as follows. If the two profile strips were offset from each other, the high water pressure also prevailed in the lower grooves and channels, which are initially located in the tunnel bore. In the profile strip, which is now further down, the bottom part of which could no longer rest on the other, higher profile, this water pressure was thus higher than the air pressure in the gap below between the two segments 1, 1 '. There was therefore a risk that the profile strip lying below could be pressed out of the recess 2 by its own internal pressure.

Um dies mit Sicherheit zu verhindern, wird daher eine in der Figur strichpunktiert gezeichnete Bohrung 15 vorgesehen, die nur noch den oberen äusseren Kanal 9 und die ihm benachbarte Nut 8, allenfalls auch noch den dem erstgenannten Kanal direkt benachbarten Kanal 10; mit der Seite 6 der Leiste verbindet und dort ins Freie mündet; damit erhalten nur noch diejenigen Hohlräume den vollen Wasserdruck, bei welchen das sie umgebende Material der Profilleiste 3 mit Sicherheit von der gegenüberliegenden Profilleiste 3' gestützt ist. In den unteren Hohlräumen herrscht hingegen nach wie vor der normale Luftdruck, welcher im wesentlichen derselbe ist wie der Druck im Spalt unterhalb der Profilleiste. Ein Herausdrücken der Leiste kann damit vermieden werden.In order to prevent this with certainty, a bore 15 drawn in broken lines in the figure is therefore provided, which only has the upper outer channel 9 and the groove 8 adjacent to it, if need be also the channel 10 directly adjacent to the first-mentioned channel; connects with the side 6 of the bar and opens out there; thus only those cavities receive the full water pressure in which the surrounding material of the profile strip 3 is supported with certainty by the opposite profile strip 3 '. In contrast, normal air pressure still prevails in the lower cavities, which is essentially the same as the pressure in the gap below the profile strip. Pressing out the bar can thus be avoided.

Damit trotz unterschiedlicher Drucke und Belastungen infolge des Aufeinanderliegens der Profilleisten 3, 3' die Spannungsverhältnisse im gesamten Querschnitt der Leiste im wesentlichen konstant bleiben, ist es von Vorteil, wenn vor allem die Abstände der Kanäle 9 und 10 unter sich, d.h. der Abstand der beiden einander am nächsten liegenden Punkte am Umfang zweier benachbarter Kanäle, im wesentlichen überall derselbe ist. Das gilt also nicht nur zwischen den Kanälen 9 und 10, sondern auch zwischen den hier dargestellten beiden Kanälen 10 unter sich, und würde auch Anwendung finden, wenn zwischen diesen Kanälen 10 gegebenenfalls noch weitere Kanäle vorhanden wären.So that, despite different pressures and loads as a result of the profile strips 3, 3 'lying one on top of the other, the tension conditions in the entire cross section of the strip remain essentially constant, it is advantageous if, above all, the distances between the channels 9 and 10 are between them, i.e. the distance between the two closest points on the circumference of two adjacent channels is essentially the same everywhere. This applies not only between the channels 9 and 10, but also between the two channels 10 shown here among themselves, and would also be used if additional channels were possibly present between these channels 10.

Mit Vorteil wird in der Vertiefung 2 vor dem Einsetzen eine Anstreich bzw. Dichtmasse 16 aufgebracht. Diese Dichtmasse, der sogenannte Primer, soll verhindern, dass Wasser zwischen dem Tübbing und der betreffenden Dichtungsprofilleiste entlang nach unten sickert. Bei hohem Wasserdruck bzw. damit verbundener grosser Beanspruchung der Profilleiste kann diese Masse als Zweikomponentenanstrich ausgeführt werden, d.h. es wird ihr noch ein Klebstoff beigemischt, der die Profilleiste dann sicher in der Vertiefung 2 festhält.A coating or sealant 16 is advantageously applied in the recess 2 before insertion. This sealing compound, the so-called primer, is intended to prevent water from seeping down between the tubbing and the relevant sealing profile strip. With high water pressure or associated high stress on the profile strip, this mass can be carried out as a two-component paint, i.e. an adhesive is added to it, which then securely holds the profile strip in the recess 2.

Claims (5)

  1. Hollow-section sealing strip made of elastic for sealing arched tunnel roofs, with a cross-section that substantially forms a hexagon having two long sides (4, 5) one (4) of which is intended for enabling the sealing strip to rest within a cavity (2) of a tunnel vault element (1) and the other one (5) intended for contacting an identical long side (5') of a further, identical sealing strip (3') in an adjacent tunnel vault element (1'), a number of grooves (8) beeing arranged along the first-mentioned long side and open towards it, as well as a row of channels (9, 10) arranged above the grooves and horizontally displaced with regards to them, said channels (9, 10) having cross-sections of a form that differs from the circular form and, in addition, also is different at the outer channels (9) at the ends of the row compared with the inner channels (10) lying in-between and comprises at each outer channel (9) and the channel (10) adjacent to it one section (94, 101) each, said sections forming a tapered zone of material (11) that enlarges towards the contact side (5) of the cross section of the strip; said contact side (5) comprising elongations (12), each one of them extending (12) beyond the respective outer channel in order to form, together with the respective adjacent side (6, 7) of the cross section, a pressure-resistive corner region (13), characterized in that the cross-section of the outer channels substantially has a trapezoidal form having two straight sections (93, 94) converging towards the contact side (5), those sides of the trapezoid that run parallel to each other being replaced by an arch (91) of small radius connecting the ends of the sections near the contact side and by an arch (92) of a radius larger than the one of the fist-mentioned arch, said arch connecting the other ends of the sections, whereas the cross-section of the non-outer channels (10) basically is circular, that circular periphery being partially replaced on the channels adjacent to the outer ones by that section (101) that, together with the corresponding outer section (94) of the adjacent outer channel, forms the tapered zone of material (11).
  2. Sealing strip according to Claim 1, characterized in that the sections (93) delimiting the corner regions (13) at their inner sides as well as the sides (6) delimiting these corner regions at their outer sides and simultaneously forming one of the sides of the sealing strip cross-section run parallel to each other in order to form a constant wall thickness of the corner region over the length of said sections.
  3. Sealing strip according to Claim 1, characterized in that the contact side (5) extends in a straight direction between the extensions (12) that rise under an angle to it in straight lines towards the exterior.
  4. Sealing strip zone according to Claim 1, characterized in that at least the outer channel (9) at that corner region (13) whose exterior side (6) will be exposed to the water penetrating into the tunnel as well as at least that groove (8) that lies below that channel are connected at least at one location along their longitudinal centre lines to a bore (15) extending transversely to said centre lines and opening at the side (6) delimiting the respective corner region (13) into the outside.
  5. Sealing strip according to one of the preceding claims, characterized in that the distances between those points that, situated on the peripheries of respective adjacent channels (9, 10), are closest to each other are substantially equal to each other.
EP90912259A 1989-11-10 1990-08-24 Hollow-section sealing strip made of elastic for sealing arched tunnel roofs Expired - Lifetime EP0453521B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH4061/89 1989-11-10
CH4061/89A CH679510A5 (en) 1989-11-10 1989-11-10

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EP0453521A1 EP0453521A1 (en) 1991-10-30
EP0453521B1 true EP0453521B1 (en) 1994-03-23

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ID=4269080

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90912259A Expired - Lifetime EP0453521B1 (en) 1989-11-10 1990-08-24 Hollow-section sealing strip made of elastic for sealing arched tunnel roofs

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EP (1) EP0453521B1 (en)
AT (1) ATE103369T1 (en)
CH (1) CH679510A5 (en)
DE (1) DE59005121D1 (en)
DK (1) DK0453521T3 (en)
WO (1) WO1991007571A1 (en)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH686383A5 (en) * 1992-01-06 1996-03-15 Dotwyler Ag Schweizerische Kab Process for preventing profile sealing strip moving relatively to tunnel structural element
CH686900A5 (en) * 1993-04-16 1996-07-31 Dotwyler Ag Schweizerische Kab Corner area of ​​a sealing frame for a Tunneltubbing.
CH687557A5 (en) * 1993-06-25 1996-12-31 Daetwyler Ag Schweizerische Kab Controls compressible printing stock for tubbing in a tubbing ring.
ATE234417T1 (en) * 1998-08-26 2003-03-15 Tarmac Ltd SEALING ARRANGEMENT FOR TUNNEL SEGMENTS
ES2254581T3 (en) 2001-10-11 2006-06-16 Datwyler Ag Schweizerische Kabel-, Gummi- Und Kunststoffwerke SHUTTER PROFILE FOR TUNNEL SEGMENTS.
CH709476A1 (en) * 2014-04-07 2015-10-15 Stefan Trümpi A method for sealing joints during the pressing pipe jacking.
CN105780939A (en) * 2016-04-20 2016-07-20 北京市市政工程设计研究总院有限公司 Post-mounted replaceable active-pressure sealing water stop belt and construction method

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL164945C (en) * 1977-11-23 1981-02-16 Vredestein Nv SEALING PROFILE FOR A SUN-TUNNEL.
GB8627911D0 (en) * 1986-11-21 1986-12-31 Benford E J Gasket seal
JPS6456926A (en) * 1987-08-26 1989-03-03 Mitsubishi Electric Corp Throttle valve controller for engine
DE3779123D1 (en) * 1987-09-10 1992-06-17 Joint Francais SEALING ELEMENT FOR TUNNEL REMOVAL SEGMENTS.
CH677262A5 (en) * 1987-12-15 1991-04-30 Phoenix Ag

Also Published As

Publication number Publication date
CH679510A5 (en) 1992-02-28
EP0453521A1 (en) 1991-10-30
ATE103369T1 (en) 1994-04-15
DE59005121D1 (en) 1994-04-28
DK0453521T3 (en) 1994-08-01
WO1991007571A1 (en) 1991-05-30

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