EP3054055B1 - Manhole shaft structure - Google Patents

Manhole shaft structure Download PDF

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Publication number
EP3054055B1
EP3054055B1 EP15187428.6A EP15187428A EP3054055B1 EP 3054055 B1 EP3054055 B1 EP 3054055B1 EP 15187428 A EP15187428 A EP 15187428A EP 3054055 B1 EP3054055 B1 EP 3054055B1
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EP
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Prior art keywords
manhole
ring
supporting edge
structure according
manhole structure
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EP15187428.6A
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German (de)
French (fr)
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EP3054055A1 (en
Inventor
Dirk Zarmutek
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Zarmutec & Co KG GmbH
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Zarmutec & Co KG GmbH
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    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D29/00—Independent underground or underwater structures; Retaining walls
    • E02D29/12—Manhole shafts; Other inspection or access chambers; Accessories therefor
    • E02D29/14—Covers for manholes or the like; Frames for covers
    • E02D29/1409—Covers for manholes or the like; Frames for covers adjustable in height or inclination

Definitions

  • the present invention relates to a manhole well structure comprising a manhole neck and a balance ring for arrangement between the manhole mouth and a manhole cover.
  • Manhole structures of the type mentioned above regularly consist of ring-shaped prefabricated concrete components, which are arranged in stacked relation to one another and connected to one another via mortar layers.
  • the known manhole structures comprise a manhole, which is regularly tapered in the manner of a crooked cone to the upper end, or which is plate-shaped with an opening.
  • the US 2004 0071508 A1 shows in Fig. 5 a manhole assembly comprising a manhole and a balance ring, wherein the Balancing ring between the chute neck and an adapter ring is arranged, which serves for adjusting the height of a arranged on the adapter ring manhole cover.
  • a concrete cap is provided for securing a position of the manhole cover.
  • the known effective in the horizontal direction anti-displacement device requires the complementary design of the throat and the balance ring, and only the combination of a recessed compensating ring with a chute neck having a flat face, do not lead to the desired horizontal anti-slip device ,
  • the vast majority of the current stock of manholes is provided with chess necks, which have a flat face, so that in the context of any repairs of manholes, which are required in particular in the context of roadworks, the desired horizontal effective displacement protection between the manhole and a balancing ring can not be achieved easily.
  • the present invention is therefore based on the object to propose a manhole structure, which allows a non-displaceable in the horizontal direction stacking arrangement between the manhole and a balancing ring despite a flat end face of the chess neck.
  • the manhole structure according to the invention has the features of claim 1.
  • the channel shaft structure for forming a horizontally displaced secure stack arrangement between the shaft neck and the compensation ring has an adapter ring with a support rim and an alignment body which is matched in its outer diameter to the inner diameter of the shaft neck or the compensation ring wherein the alignment body has an upper part for engagement in the compensation ring and a lower part for engagement in the shaft neck and the bearing edge is formed in the transition between the upper part and the lower part radially outward on the alignment body.
  • the manhole structure according to the invention thus enables a stackable arrangement of the manhole structure which is secure against displacement in the horizontal direction, without the need for direct engagement between the manhole and the compensation ring, which is produced in the known manhole structures by, for example, a projection formed on the end face of the manhole engages formed on a bottom of the compensating ring recess. Rather, a shift securing effecting in the horizontal direction engagement connection between the shaft neck and the compensation ring is independent of the configuration of the end face of the shaft neck and the underside of the compensation ring possible.
  • the engagement between the adjacent components is created by the fact that the adapter ring defines an alignment of the relative arrangement of the adjacent components in the horizontal direction and with its support edge, which is disposed between the chine neck and the balance ring, the position of the adapter ring in a relative vertical arrangement secures the neighboring components.
  • manhole structure of the support rim is formed as a arranged in the transition between the upper part and the lower flange, so that on the one hand a circumferentially uniform support of the adapter ring on the shaft neck is made possible and also by simply adjusting the diameter of the flange to the diameter the chess neck a substantially flush with the contour of the chess neck arrangement of the adapter ring in the manhole shaft construction is possible.
  • the flange can be annular but basically adapted to the cross-sectional shape of the chess neck or the geometry of the end face of the chess neck.
  • the alignment body is designed as a tubular sleeve, so that a uniform over the circumference of the tubular sleeve horizontal support of the alignment with respect to the chute neck or the compensation ring is made possible.
  • the alignment body can in principle assume any configuration which makes it possible for the alignment body to permit a defined horizontal relative arrangement of the component connected to one another via the adapter ring.
  • the alignment body can therefore also be formed by three essentially vertical rods aligned with one another in defined relative arrangements, which are arranged on the support edge.
  • tubular sleeve has a radial offset in the transition from the lower part to the upper part, such that the upper part has a larger diameter than the lower part and the supporting edge extends radially outward from the upper part, it is ensured that the supporting edge does not reduce the clearance Cross section of the channel structure causes, and on the other hand, that the upper part of the Ausricht stressess is set back radially relative to the lower part, so that the risk of collision with imported from above into the opening of the manhole structure components thereof, such as a hinged in the manhole cover strainer, significantly reduced is.
  • the alignment body may also be formed so that to achieve the engagement between the Ausricht analyses and the adjacent components, only the lower part or the upper part of the Ausricht stressess in by Inner diameter of the throat or the compensation ring defined opening engages and the other part of the alignment body engages to form the engagement in the component.
  • the lower part of the Ausricht stressess engage in the opening of the chess neck and the upper part of the Ausricht stressess in the recess of the balance ring.
  • the lower part of the alignment body is designed as a mechanical connection device, a mechanically frictional connection between the alignment body and the shaft neck can already be produced without the arrangement of an intermediate layer of mortar or the like.
  • the mechanical connection device has at least two bolt connections between the support rim and the shaft neck, which may particularly preferably be designed as plug connections.
  • the support edge is provided on its top and / or its bottom with preferably designed as knobs or pins spacers.
  • the support edge is provided with a profiled surface on its top and / or bottom side, so that the adhesion of a joint compound arranged between the bearing edge and the adjacent components, that is to say for example mortar, on the surface of the bearing edge is improved.
  • the support rim has recesses which allow a penetration of the support rim with the grout, in particular a casting filling the joints can be made from above, ie only after the adapter ring has been arranged on the shaft.
  • an underside of the support rim and an end face of the shaft neck extending parallel to each other, such that between the support edge of the adapter ring and the end face of the shaft neck, a lower joint is formed with a constant joint height and between an upper side of the support rim and a bottom of the arranged on the support edge and provided with a formed on an outer edge of the bottom return ring an upper joint with vertical height offset is formed, wherein the support edge of the adapter ring is provided on its upper side with an annular edge formed on the outer edge, such that the annular web to form a engages the upper joint with a constant joint height in the return of the balance ring.
  • a manhole structure 10 which forms an upper part of a manhole not shown here in its entirety.
  • the manhole structure 10 comprises as shown in FIG Fig. 2 a lower manhole ring 11, which is provided for arrangement on a manhole, not shown, the the connection of the manhole to a channel, also not shown, so for example, forms a sewer.
  • a chute neck 12 On the shaft ring 11 is a chute neck 12, which is formed in the present case substantially as a slated, tapered conical top formed with an upper end and a Schachthalsö réelle 13 defining end face 14 between the chess neck 12 and one above the chess neck 12th arranged on the balancing ring 15 is a manhole cover 17 which has a cast frame 18 with a recorded in the cast frame 18 manhole cover 19.
  • the cast frame 18 has a concrete frame 24 with which the cast frame 18 is arranged on the compensating ring 15.
  • the adapter ring 16 has a tubular or sleeve-shaped alignment body 20 which engages with an upper part 21 in a compensation ring opening 22 of the compensation ring 15 and a lower part 23 which engages in the shaft opening 13.
  • a bearing rim formed here as a flange ring 25 is formed on the adapter ring, which is arranged between the end face 14 of the chute neck 12 and a lower side 26 of the compensating ring 15.
  • FIG. 3 shows, in each case between a top 27 of the flange 25 and the bottom 26 of the balancing ring 15 and a bottom 28 of the flange 25 and the end face 14 of the throat 12 a filled with grout upper joint 29 and lower joint 30 is formed, for reasons of clearer representation in Fig. 2 on the representation of the grout in the upper joint 29 and the lower joint 30 was also omitted as the representation of the grout between the manhole 12 and the manhole ring 11 to fill a manhole ring 31th As grout come in addition to a conventional mortar and a grout or an adhesive is used.
  • Fig. 3 Furthermore, shows the alignment member 20 formed here as a tubular sleeve in the transition from the lower part 23 to the upper part 21 on a radial offset 32, such that the upper part has a larger diameter d 1 than the diameter d 2 of the lower part 23.
  • Wie Fig. 3 clearly shows, allows the aforementioned diameter gradation adaptation of the alignment body 20 to the contour of a cup-shaped and projecting into the alignment body 20 strainer 33, which is inserted into the manhole cover 17.
  • Fig. 3 shows the alignment member 20 formed here as a tubular sleeve in the transition from the lower part 23 to the upper part 21 on a radial offset 32, such that the upper part has a larger diameter d 1 than the diameter d 2 of the lower part 23.
  • Wie Fig. 3 clearly shows, allows the aforementioned diameter gradation adaptation of the alignment body 20 to the contour of a cup-shaped and projecting into the alignment body 20 strainer 33, which is inserted into the manhole cover 17.
  • Fig. 4 shows in a further embodiment, an adapter ring 34 as part of a manhole structure 35, which coincides with the manhole structure 10 in Fig. 3 having the adapter ring 34 between the chute neck 12 and the compensation ring 15.
  • the adapter ring 34 of the manhole structure 35 in otherwise matching with the adapter ring 16 embodiment on an outer edge 36 on a top 37 of its flange 38 an annular web 39 which engages in a formed on the compensating ring 15 recess 40 , With the annular web 39 is achieved that not only between a bottom 41 of the flange 38 and the end face 14 of the throat 12, a lower joint 30 is formed with a constant joint height, but also between the top 37 of the flange 38 and the bottom 26 of the balancing ring 15th ,
  • Fig. 5 shows a manhole assembly 42 with an adapter ring 43, in which a support ring 44 between a lower part 45 of an alignment body 46 and one here as a ring land, which engages in the recess 40 of the compensating ring 15, formed upper part 47 of the Ausricht stressess 46 extends.
  • Fig. 6 1 shows a manhole structure 48 with an adapter ring 49 which has a flange ring 50 which extends with a radial inner part 51 between an upper part 52 of an alignment body 53 and a lower part of the alignment body 53, in the present case as a mechanical connection device, for example a bolt connection 54 , is executed.
  • the flange ring 50 can be provided at its outer edge with an annular web 55, which engages in the recess 40 of the compensating ring 15.
  • the flange 25 may be provided on its upper side 27 and its underside 28 with a surface profiling 56, which is formed in the present case of concentric Profilrillen57 and 58 and intersecting tread grooves 59, 60.
  • the flange ring 25 recesses 61, 62, the penetration openings form, through which a direct connection between the upper joint 29 and the lower joint 30 (FIG. Fig. 3 ) given is.

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  • Engineering & Computer Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Mining & Mineral Resources (AREA)
  • Paleontology (AREA)
  • Civil Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Underground Structures, Protecting, Testing And Restoring Foundations (AREA)

Description

Die vorliegende Erfindung betrifft einen Kanalschachtaufbau umfassend einen Schachthals und einen Ausgleichsring zur Anordnung zwischen dem Schachthals und einer Schachtabdeckung.The present invention relates to a manhole well structure comprising a manhole neck and a balance ring for arrangement between the manhole mouth and a manhole cover.

Kanalschachtaufbauten der eingangs genannten Art bestehen regelmäßig aus ringförmig gestalteten Betonfertigkomponenten, die in Stapelanordnung aufeinander angeordnet und über Mörtelschichten miteinander verbunden sind. Als wesentliche Komponenten umfassen die bekannten Kanalschachtaufbauten einen Schachthals, der regelmäßig nach Art eines schiefen Konus zum oberen Ende hin verjüngt ausgebildet ist, oder der plattenförmig ausgebildet ist mit einer Öffnung. Auf die obere Stirnfläche des Schachthalses bzw. den Öffnungsrand der Platte werden ein oder mehrere Ausgleichsringe in Stapelanordnung aufgebracht, die zur Einstellung eines vertikalen Abstandes der Schachtabdeckung vom Schachthals dienen.Manhole structures of the type mentioned above regularly consist of ring-shaped prefabricated concrete components, which are arranged in stacked relation to one another and connected to one another via mortar layers. As essential components, the known manhole structures comprise a manhole, which is regularly tapered in the manner of a crooked cone to the upper end, or which is plate-shaped with an opening. On the upper end face of the chess neck or the opening edge of the plate, one or more compensation rings are applied in a stacked arrangement, which serve to set a vertical distance of the manhole cover from the shaft neck.

Die US 2004 0071508 A1 zeigt in Fig. 5 einen Kanalschachtaufbau umfassend einen Schachthals und einen Ausgleichsring, wobei der Ausgleichsring zwischen dem Schachthals und einem Adapterring angeordnet ist, der zur Höheneinstellung einer auf dem Adapterring angeordneten Schachtabdeckung dient. Zur Lagesicherung einer aus der Schachtabdeckung, dem Adapterring und dem Ausgleichsring gebildeten Stapelanordnung auf dem Schachthals ist eine Betonkappe vorgesehen.The US 2004 0071508 A1 shows in Fig. 5 a manhole assembly comprising a manhole and a balance ring, wherein the Balancing ring between the chute neck and an adapter ring is arranged, which serves for adjusting the height of a arranged on the adapter ring manhole cover. For securing a position of the manhole cover, the adapter ring and the compensation ring formed stacking arrangement on the manhole a concrete cap is provided.

Aus der DE 25 25 285 A1 ist es bekannt, zur Herstellung einer in horizontaler Richtung verschiebesicheren Relativanordnung der Ausgleichsringe untereinander und des unteren Ausgleichrings gegenüber dem Schachthals, die Stirnfläche des Schachthalses sowie die Unterseiten und Oberseiten der Ausgleichringe mit als Vorsprünge und Rücksprünge ausgebildeten zueinander komplementären Stapelsicherungen zu versehen.From the DE 25 25 285 A1 It is known to produce a horizontally displaceable relative arrangement of the balancing rings to provide each other and the lower balancing ring with respect to the manhole neck, the end face of the chess neck and the undersides and tops of the balancing rings with mutually complementary stacking fuses designed as projections and recesses.

Aus dem Vorstehenden ergibt sich, dass die bekannte in horizontaler Richtung wirksame Verschiebesicherung die komplementäre Ausgestaltung des Schachthalses und des Ausgleichsrings voraussetzt, und allein die Kombination eines mit Rücksprüngen versehenen Ausgleichsrings mit einem Schachthals, der eine ebene Stirnfläche aufweist, nicht zu der gewünschten horizontalen Verschiebesicherung führen. Der überwiegende Teil des aktuellen Bestandes an Kanalschächten ist jedoch mit Schachthälsen versehen, die eine ebene Stirnfläche aufweisen, so dass also im Rahmen allfälliger Reparaturen von Kanalschächten, die insbesondere im Rahmen von Straßenbauarbeiten erforderlich werden, die gewünschte horizontal wirksame Verschiebesicherung zwischen dem Schachthals und einem Ausgleichsring nicht ohne weiteres erreicht werden.From the above it follows that the known effective in the horizontal direction anti-displacement device requires the complementary design of the throat and the balance ring, and only the combination of a recessed compensating ring with a chute neck having a flat face, do not lead to the desired horizontal anti-slip device , However, the vast majority of the current stock of manholes is provided with chess necks, which have a flat face, so that in the context of any repairs of manholes, which are required in particular in the context of roadworks, the desired horizontal effective displacement protection between the manhole and a balancing ring can not be achieved easily.

Der vorliegenden Erfindung liegt daher die Aufgabe zugrunde, einen Kanalschachtaufbau vorzuschlagen, der eine in horizontaler Richtung verschiebesichere Stapelanordnung zwischen dem Schachthals und einem Ausgleichsring trotz einer eben ausgebildeten Stirnfläche des Schachthalses ermöglicht.The present invention is therefore based on the object to propose a manhole structure, which allows a non-displaceable in the horizontal direction stacking arrangement between the manhole and a balancing ring despite a flat end face of the chess neck.

Zur Lösung dieser Aufgabe weist der erfindungsgemäße Kanalschachtaufbau die Merkmale des Anspruchs 1 auf.To solve this problem, the manhole structure according to the invention has the features of claim 1.

Erfindungsgemäß weist der Kanalschachtaufbau zur Ausbildung einer horizontal verschiebesicheren Stapelanordnung zwischen dem Schachthals und dem Ausgleichsring einen Adapterring mit einem Auflagerand und einem in seinem Außendurchmesser an den Innendurchmesser des Schachthalses oder des Ausgleichsringes angepassten Ausrichtkörper auf, wobei der Ausrichtkörper ein Oberteil zum Eingriff in den Ausgleichsring und ein Unterteil zum Eingriff in den Schachthals aufweist und der Auflagerand im Übergang zwischen dem Oberteil und dem Unterteil radial außen am Ausrichtkörper ausgebildet ist.According to the invention, the channel shaft structure for forming a horizontally displaced secure stack arrangement between the shaft neck and the compensation ring has an adapter ring with a support rim and an alignment body which is matched in its outer diameter to the inner diameter of the shaft neck or the compensation ring wherein the alignment body has an upper part for engagement in the compensation ring and a lower part for engagement in the shaft neck and the bearing edge is formed in the transition between the upper part and the lower part radially outward on the alignment body.

Der erfindungsgemäße Kanalschachtaufbau ermöglicht somit eine in horizontaler Richtung verschiebesichere Stapelanordnung des Kanalschachtaufbaus, ohne dass hierzu ein unmittelbarer Eingriff zwischen dem Schachthals und dem Ausgleichsring erforderlich wäre, der bei den bekannten Kanalschachtaufbauten etwa dadurch erzeugt wird, dass ein auf der Stirnfläche des Schachthalses ausgebildeter Vorsprung in einen an einer Unterseite des Ausgleichsrings ausgebildeten Rücksprung eingreift. Vielmehr ist eine die Verschiebesicherung in horizontaler Richtung bewirkende Eingriffsverbindung zwischen dem Schachthals und dem Ausgleichsring unabhängig von der Ausgestaltung der Stirnfläche des Schachthalses und der Unterseite des Ausgleichsrings möglich. Stattdessen wird der Eingriff zwischen den benachbarten Komponenten dadurch erzeugt, dass der Adapterring mit einem Ausrichtkörper die Relativanordnung der benachbarten Komponenten in horizontaler Richtung definiert und mit seinem Auflagerand, der zwischen dem Schachthals und dem Ausgleichsring angeordnet ist, die Position des Adapterrings auch in vertikaler Relativanordnung zu den benachbarten Komponenten sichert.The manhole structure according to the invention thus enables a stackable arrangement of the manhole structure which is secure against displacement in the horizontal direction, without the need for direct engagement between the manhole and the compensation ring, which is produced in the known manhole structures by, for example, a projection formed on the end face of the manhole engages formed on a bottom of the compensating ring recess. Rather, a shift securing effecting in the horizontal direction engagement connection between the shaft neck and the compensation ring is independent of the configuration of the end face of the shaft neck and the underside of the compensation ring possible. Instead, the engagement between the adjacent components is created by the fact that the adapter ring defines an alignment of the relative arrangement of the adjacent components in the horizontal direction and with its support edge, which is disposed between the chine neck and the balance ring, the position of the adapter ring in a relative vertical arrangement secures the neighboring components.

Bei einer bevorzugten Ausführungsform des Kanalschachtaufbaus ist der Auflagerand als ein im Übergang zwischen dem Oberteil und dem Unterteil angeordneter Flanschring ausgebildet, so dass zum einen eine umlaufend gleichmäßige Auflage des Adapterrings auf dem Schachthals ermöglicht wird und zudem durch einfache Anpassung des Durchmessers des Flanschrings an den Durchmesser des Schachthalses ein im Wesentlichen mit der Kontur des Schachthalses bündige Anordnung des Adapterrings im Kanalschachtaufbau möglich wird.In a preferred embodiment of the manhole structure of the support rim is formed as a arranged in the transition between the upper part and the lower flange, so that on the one hand a circumferentially uniform support of the adapter ring on the shaft neck is made possible and also by simply adjusting the diameter of the flange to the diameter the chess neck a substantially flush with the contour of the chess neck arrangement of the adapter ring in the manhole shaft construction is possible.

Der Flanschring kann kreisringförmig aber grundsätzlich an die Querschnittsform des Schachthalses bzw. die Geometrie der Stirnfläche des Schachthalses angepasst sein.The flange can be annular but basically adapted to the cross-sectional shape of the chess neck or the geometry of the end face of the chess neck.

Vorzugsweise ist der Ausrichtkörper als Rohrhülse ausgebildet, so dass eine über den Umfang der Rohrhülse gleichmäßige horizontale Abstützung des Ausrichtkörpers gegenüber dem Schachthals beziehungsweise dem Ausgleichsring ermöglicht wird. Abweichend von der Ausgestaltung des Ausrichtkörpers als Rohrhülse kann der Ausrichtkörper grundsätzlich jedweder Ausgestaltung annehmen, die es ermöglicht, dass der Ausrichtkörper eine definierte horizontale Relativanordnung der über den Adapterring miteinander verbundenen Komponente ermöglicht. Beispielsweise kann der Ausrichtkörper daher auch durch drei in definierte Relativanordnungen zueinander ausgerichtete im Wesentlichen vertikale Stäbe gebildet sein, die am Auflagerand angeordnet sind.Preferably, the alignment body is designed as a tubular sleeve, so that a uniform over the circumference of the tubular sleeve horizontal support of the alignment with respect to the chute neck or the compensation ring is made possible. Notwithstanding the configuration of the alignment body as a tube sleeve, the alignment body can in principle assume any configuration which makes it possible for the alignment body to permit a defined horizontal relative arrangement of the component connected to one another via the adapter ring. For example, the alignment body can therefore also be formed by three essentially vertical rods aligned with one another in defined relative arrangements, which are arranged on the support edge.

Wenn die Rohrhülse im Übergang vom Unterteil zum Oberteil einen radialen Versatz aufweist, derart, dass der Oberteil einen größeren Durchmesser aufweist als der Unterteil und der Auflagerand sich ausgehend vom Oberteil radial nach außen erstreckt, ist zum einen sichergestellt, dass der Auflagerand keine Reduzierung des lichten Querschnitts des Kanalaufbaus bewirkt, und zum anderen, dass der Oberteil des Ausrichtkörpers gegenüber dem Unterteil radial zurückversetzt ist, so dass die Gefahr einer Kollision mit von oben in die Öffnung des Kanalschachtaufbaus eingeführten Komponenten desselben, wie beispielsweise ein in die Schachtabdeckung eingehängter Schmutzfänger, erheblich reduziert ist.If the tubular sleeve has a radial offset in the transition from the lower part to the upper part, such that the upper part has a larger diameter than the lower part and the supporting edge extends radially outward from the upper part, it is ensured that the supporting edge does not reduce the clearance Cross section of the channel structure causes, and on the other hand, that the upper part of the Ausrichtkörpers is set back radially relative to the lower part, so that the risk of collision with imported from above into the opening of the manhole structure components thereof, such as a hinged in the manhole cover strainer, significantly reduced is.

Darüber hinaus wird mit dem vergleichsweise größeren Durchmesser des Oberteils beziehungsweise dem vergleichsweise geringeren Durchmesser des Unterteils des Ausrichtkörpers dem Umstand Rechnung getragen, dass die Durchmessertoleranzen des Innendurchmessers des Ausgleichsrings fertigungsbedingt kleiner sind als die Durchmessertoleranzen des Öffnungsdurchmessers des Schachthalses, so dass eine exaktere Horizontalpositionierung des Ausgleichsrings gegenüber dem Schachthals ermöglicht wird.In addition, with the comparatively larger diameter of the upper part or the comparatively smaller diameter of the lower part of the Ausrichtkörpers the circumstance taken into account that the diameter tolerances of the inner diameter of the compensating ring due to production are smaller than the diameter tolerances of the opening diameter of the Schachthalses, so that a more accurate Horizontal positioning of the compensation ring relative to the chute neck is made possible.

Wenn sich der Auflagerand des Adapterrings zumindest teilweise zwischen dem Unterteil und dem Oberteil des Ausrichtkörpers erstreckt, kann der Ausrichtkörper auch so ausgebildet sein, dass zur Erzielung des Eingriffs zwischen dem Ausrichtkörper und den benachbarten Komponenten lediglich der Unterteil oder der Oberteil des Ausrichtkörpers in die durch den Innendurchmesser des Schachthalses beziehungsweise des Ausgleichsrings definierte Öffnung eingrifft und der jeweils andere Teil des Ausrichtkörpers zur Ausbildung des Eingriffs in die Komponente eingreift. Vorzugsweise kann etwa der Unterteil des Ausrichtkörpers in die Öffnung des Schachthalses und der Oberteil des Ausrichtkörpers in den Rücksprung des Ausgleichsrings eingreifen.When the bearing rim of the adapter ring at least partially extends between the lower part and the upper part of the Ausrichtkörpers, the alignment body may also be formed so that to achieve the engagement between the Ausrichtkörper and the adjacent components, only the lower part or the upper part of the Ausrichtkörpers in by Inner diameter of the throat or the compensation ring defined opening engages and the other part of the alignment body engages to form the engagement in the component. Preferably, for example, the lower part of the Ausrichtkörpers engage in the opening of the chess neck and the upper part of the Ausrichtkörpers in the recess of the balance ring.

Wenn der Unterteil des Ausrichtkörpers als mechanische Verbindungseinrichtung ausgebildet ist, kann bereits eine mechanisch kraftschlüssige Verbindung zwischen dem Ausrichtkörper und dem Schachthals hergestellt werden, ohne die Anordnung einer zwischenliegenden Mörtelschicht oder dergleichen.If the lower part of the alignment body is designed as a mechanical connection device, a mechanically frictional connection between the alignment body and the shaft neck can already be produced without the arrangement of an intermediate layer of mortar or the like.

Vorzugsweise weist die mechanische Verbindungseinrichtung zumindest zwei Bolzenverbindungen zwischen dem Auflagerand und dem Schachthals auf, die besonders bevorzugt als Dübelverbindungen ausgebildet sein können.Preferably, the mechanical connection device has at least two bolt connections between the support rim and the shaft neck, which may particularly preferably be designed as plug connections.

Zur exakten Einstellung der Fugendicke zwischen dem Auflagerand und den benachbarten Komponenten, also dem Schachthals und dem Ausgleichsring ist es vorteilhaft, wenn der Auflagerand auf seiner Oberseite und/oder seiner Unterseite mit vorzugsweise als Noppen oder Stiften ausgebildeten Abstandshaltern versehen ist.For exact adjustment of the joint thickness between the support edge and the adjacent components, so the chute neck and the compensation ring, it is advantageous if the support edge is provided on its top and / or its bottom with preferably designed as knobs or pins spacers.

Besonders bevorzugt ist es auch, wenn der Auflagerand auf seiner Ober- und/oder seiner Unterseite mit einer profilierten Oberfläche versehen ist, so dass die Haftung einer zwischen dem Auflagerand und den benachbarten Komponenten angeordneten Fugenmasse, also beispielsweise Mörtel auf der Oberfläche des Auflagerands verbessert wird.It is also particularly preferred if the support edge is provided with a profiled surface on its top and / or bottom side, so that the adhesion of a joint compound arranged between the bearing edge and the adjacent components, that is to say for example mortar, on the surface of the bearing edge is improved.

Wenn der Auflagerand Ausnehmungen aufweist, die eine Durchdringung des Auflagerandes mit der Fugenmasse ermöglicht, kann insbesondere ein die Fugen ausfüllende Verguss von oben her, also erst nach Anordnung des Adapterrings auf dem Schachthals erfolgen.If the support rim has recesses which allow a penetration of the support rim with the grout, in particular a casting filling the joints can be made from above, ie only after the adapter ring has been arranged on the shaft.

Bei einer besonders bevorzugten Ausführungsform erstrecken sich eine Unterseite des Auflagerandes und eine Stirnfläche des Schachthalses parallel zueinander, derart, dass zwischen dem Auflagerand des Adapterringes und der Stirnfläche des Schachthalses eine untere Fuge mit konstanter Fugenhöhe ausgebildet ist und zwischen einer Oberseite des Auflagerandes und einer Unterseite des auf dem Auflagerand angeordneten und mit einem an einem Außenrand der Unterseite ausgebildeten Rücksprung versehenen Ausgleichsrings eine obere Fuge mit vertikalem Höhenversatz ausgebildet ist, wobei der Auflagerand des Adapterrings auf seiner Oberseite mit einem am Außenrand ausgebildeten Ringsteg versehen ist, derart, dass der Ringsteg zur Ausbildung einer oberen Fuge mit konstanter Fugenhöhe in den Rücksprung des Ausgleichsrings eingreift.In a particularly preferred embodiment, an underside of the support rim and an end face of the shaft neck extending parallel to each other, such that between the support edge of the adapter ring and the end face of the shaft neck, a lower joint is formed with a constant joint height and between an upper side of the support rim and a bottom of the arranged on the support edge and provided with a formed on an outer edge of the bottom return ring an upper joint with vertical height offset is formed, wherein the support edge of the adapter ring is provided on its upper side with an annular edge formed on the outer edge, such that the annular web to form a engages the upper joint with a constant joint height in the return of the balance ring.

Bei einem derart vorteilhaft ausgestalteten Kanalschachtaufbau ist sichergestellt, dass trotz des vertikalen Versatzes der Fuge zwischen der Oberseite des Auflagerandes und der Unterseite des Ausgleichsrings eine konstante Fugenhöhe zwischen dem Ausgleichsring und dem Adapterring ermöglicht wird.In such an advantageously designed manhole structure ensures that despite the vertical offset of the joint between the top of the support rim and the bottom of the balance ring a constant joint height between the balance ring and the adapter ring is made possible.

Nachfolgend werden bevorzugte Ausführungsformen des erfindungsgemäßen Kanalschachtaufbaus bezugnehmend auf die Zeichnung näher erläutert.Hereinafter, preferred embodiments of the manhole structure according to the invention are explained in detail with reference to the drawing.

Es zeigen:

Fig. 1
eine Draufsicht auf einen Kanalschachtaufbau mit einer zur Anordnung in einer Fahrbahndecke vorgesehenen Schachtabdeckung;
Fig. 2
eine Schnittdarstellung des in Fig. 1 dargestellten Kanalschachtaufbaus gemäß Schnittlinienverlauf II-II in Fig. 1;
Fig. 3
eine vergrößerte Teildarstellung des in Fig. 2 im Schnitt dargestellten Kanalschachtaufbaus mit einem zwischen einem Schachthals und einem Ausgleichsring angeordneten Adapterring in einer ersten Ausführungsform;
Fig. 4
einen Kanalschachtaufbau mit einer weiteren Ausführungsform des Adapterrings;
Fig. 5
einen Kanalschachtaufbau mit einem Adapterring in einer weiteren Ausführungsform;
Fig. 6
einen Kanalschachtaufbau mit einem Adapterring in einer weiteren Ausführungsform;
Fig. 7
einen Adapterring in einer weiteren Ausführungsform in Draufsicht;
Fig. 8
den in Fig. 7 dargestellten Adapterring in Querschnittdarstellung;
Fig. 9
eine vergrößerte Teildarstellung des in Fig. 8 dargestellten Adapterrings.
Show it:
Fig. 1
a plan view of a manhole structure with a provided for installation in a road surface manhole cover;
Fig. 2
a sectional view of the in Fig. 1 illustrated manhole construction according to section line II-II in Fig. 1 ;
Fig. 3
an enlarged partial view of the in Fig. 2 sectional duct construction shown in section with an adapter ring arranged between a shaft neck and a compensation ring in a first embodiment;
Fig. 4
a manhole structure with another embodiment of the adapter ring;
Fig. 5
a manhole structure with an adapter ring in another embodiment;
Fig. 6
a manhole structure with an adapter ring in another embodiment;
Fig. 7
an adapter ring in another embodiment in plan view;
Fig. 8
the in Fig. 7 illustrated adapter ring in cross-sectional view;
Fig. 9
an enlarged partial view of the in Fig. 8 illustrated adapter ring.

In den Fig. 1 und 2 ist ein Kanalschachtaufbau 10 dargestellt, der einen oberen Teil eines hier in seiner Gesamtheit nicht dargestellten Kanalschachts ausbildet. Der Kanalschachtaufbau 10 umfasst entsprechend der Darstellung in Fig. 2 einen unteren Schachtring 11, der zur Anordnung auf einem nicht dargestellten Schachtunterteil vorgesehen ist, das den Anschluss des Kanalschachts an einen ebenfalls nicht dargestellten Kanal, also beispielsweise eine Abwasserleitung ausbildet.In the Fig. 1 and 2 For example, a manhole structure 10 is shown which forms an upper part of a manhole not shown here in its entirety. The manhole structure 10 comprises as shown in FIG Fig. 2 a lower manhole ring 11, which is provided for arrangement on a manhole, not shown, the the connection of the manhole to a channel, also not shown, so for example, forms a sewer.

Auf dem Schachtring 11 befindet sich ein Schachthals 12, der im vorliegenden Fall im Wesentlichen als schiefer, nach oben verjüngt ausgebildeter Konus ausgebildet ist mit einer am oberen Ende ausgebildeten und eine Schachthalsöffnung 13 definierenden Stirnfläche 14. Zwischen dem Schachthals 12 und einem oberhalb des Schachthalses 12 angeordneten Ausgleichsring 15 befindet sich ein Adapterring 16. Auf dem Ausgleichsring 15 ist eine Schachtabdeckung 17 angeordnet, die einen Gussrahmen 18 mit einem im Gussrahmen 18 aufgenommenen Schachtdeckel 19 aufweist. Der Gussrahmen 18 weist eine Betonfassung 24 auf, mit der der Gussrahmen 18 auf dem Ausgleichsring 15 angeordnet ist.On the shaft ring 11 is a chute neck 12, which is formed in the present case substantially as a slated, tapered conical top formed with an upper end and a Schachthalsöffnung 13 defining end face 14 between the chess neck 12 and one above the chess neck 12th arranged on the balancing ring 15 is a manhole cover 17 which has a cast frame 18 with a recorded in the cast frame 18 manhole cover 19. The cast frame 18 has a concrete frame 24 with which the cast frame 18 is arranged on the compensating ring 15.

Der Adapterring 16 weist einen rohr- oder hülsenförmig ausgebildeten Ausrichtkörper 20 auf, der mit einem Oberteil 21 in eine Ausgleichsringöffnung 22 des Ausgleichsrings 15 eingreift und einen Unterteil 23, der in die Schachthalsöffnung 13 eingreift. Im Übergang zwischen dem Oberteil 21 und dem Unterteil 23 ist an dem Adapterring ein hier als Flanschring 25 ausgebildeter Lagerand ausgebildet, der zwischen der Stirnfläche 14 des Schachthalses 12 und einer Unterseite 26 des Ausgleichsrings 15 angeordnet ist.The adapter ring 16 has a tubular or sleeve-shaped alignment body 20 which engages with an upper part 21 in a compensation ring opening 22 of the compensation ring 15 and a lower part 23 which engages in the shaft opening 13. In the transition between the upper part 21 and the lower part 23, a bearing rim formed here as a flange ring 25 is formed on the adapter ring, which is arranged between the end face 14 of the chute neck 12 and a lower side 26 of the compensating ring 15.

Wie insbesondere auch Fig.3 zeigt, ist jeweils zwischen einer Oberseite 27 des Flanschrings 25 und der Unterseite 26 des Ausgleichsrings 15 sowie einer Unterseite 28 des Flanschrings 25 und der Stirnfläche 14 des Schachthalses 12 eine mit Fugenmasse verfüllte obere Fuge 29 bzw. untere Fuge 30 ausgebildet, wobei aus Gründen der übersichtlicheren Darstellung in Fig. 2 auf die Darstellung der Fugenmasse in der oberen Fuge 29 und der unteren Fuge 30 ebenso verzichtet wurde wie auf die Darstellung der Fugenmasse zwischen dem Schachthals 12 und dem Schachtring 11 zur Ausfüllung einer Schachtringfuge 31. Als Fugenmasse kommen grundsätzlich neben einem konventionellen Mörtel auch ein Vergussmörtel oder ein Kleber zum Einsatz.As in particular Figure 3 shows, in each case between a top 27 of the flange 25 and the bottom 26 of the balancing ring 15 and a bottom 28 of the flange 25 and the end face 14 of the throat 12 a filled with grout upper joint 29 and lower joint 30 is formed, for reasons of clearer representation in Fig. 2 on the representation of the grout in the upper joint 29 and the lower joint 30 was also omitted as the representation of the grout between the manhole 12 and the manhole ring 11 to fill a manhole ring 31th As grout come in addition to a conventional mortar and a grout or an adhesive is used.

Wie Fig. 3 weiterhin zeigt, weist der hier als rohrförmige Hülse ausgebildet Ausrichtkörper 20 im Übergang vom Unterteil 23 zum Oberteil 21 einen radialen Versatz 32 auf, derart, dass der Oberteil einen größeren Durchmesser d1 aufweist als der Durchmesser d2 des Unterteils 23. Wie Fig. 3 deutlich zeigt, ermöglicht die vorgenannte Durchmesserabstufung eine Anpassung des Ausrichtkörpers 20 an die Kontur eines becherförmig ausgebildeten und in den Ausrichtkörper 20 hineinragenden Schmutzfängers 33, der in die Schachtabdeckung 17 eingesetzt ist. Darüber hinaus zeigt Fig. 3 deutlich, dass aufgrund der Durchmesserabstufung der lichte Abstand a1 zwischen dem Oberteil 21 des Ausrichtkörpers 20 und dem Ausgleichsring 15 kleiner ist als der lichte Abstand a2 zwischen dem Unterteil 23 des Ausrichtkörpers 20 und dem Schachthals 12. Hierdurch wird der Tatsache Rechnung getragen, dass der Schachthals 12 mit vergleichsweise größeren Fertigungstoleranzen hergestellt wird als der Ausgleichsring 15.As Fig. 3 Furthermore, shows the alignment member 20 formed here as a tubular sleeve in the transition from the lower part 23 to the upper part 21 on a radial offset 32, such that the upper part has a larger diameter d 1 than the diameter d 2 of the lower part 23. Wie Fig. 3 clearly shows, allows the aforementioned diameter gradation adaptation of the alignment body 20 to the contour of a cup-shaped and projecting into the alignment body 20 strainer 33, which is inserted into the manhole cover 17. In addition, shows Fig. 3 clearly that due to the diameter graduation of the clear distance a 1 between the upper part 21 of the Ausrichtkörpers 20 and the compensating ring 15 is smaller than the clear distance a 2 between the lower part 23 of the Ausrichtkörpers 20 and the Schachthals 12. This takes into account the fact that the chute neck 12 is manufactured with comparatively larger manufacturing tolerances than the compensation ring 15th

Fig. 4 zeigt in einer weiteren Ausführungsform einen Adapterring 34 als Bestandteil eines Kanalschachtaufbaus 35, der übereinstimmend mit dem Kanalschachtaufbau 10 in Fig. 3 den Adapterring 34 zwischen dem Schachthals 12 und dem Ausgleichsring 15 aufweist. Im Unterschied zu dem Adapterring 16 des Kanalschachtaufbaus 10 weist der Adapterring 34 des Kanalschachtaufbaus 35 bei ansonsten mit dem Adapterring 16 übereinstimmender Ausgestaltung an einem Außenrand 36 an einer Oberseite 37 seines Flanschrings 38 einen Ringsteg 39 auf, der in einen am Ausgleichsring 15 ausgebildeten Rücksprung 40 eingreift. Mit dem Ringsteg 39 wird erreicht, dass nicht nur zwischen einer Unterseite 41 des Flanschrings 38 und der Stirnfläche 14 des Schachthalses 12 eine untere Fuge 30 mit konstanter Fugenhöhe ausgebildet wird, sondern ebenso zwischen der Oberseite 37 des Flanschrings 38 und der Unterseite 26 des Ausgleichsrings 15. Fig. 4 shows in a further embodiment, an adapter ring 34 as part of a manhole structure 35, which coincides with the manhole structure 10 in Fig. 3 having the adapter ring 34 between the chute neck 12 and the compensation ring 15. In contrast to the adapter ring 16 of the manhole structure 10, the adapter ring 34 of the manhole structure 35 in otherwise matching with the adapter ring 16 embodiment on an outer edge 36 on a top 37 of its flange 38 an annular web 39 which engages in a formed on the compensating ring 15 recess 40 , With the annular web 39 is achieved that not only between a bottom 41 of the flange 38 and the end face 14 of the throat 12, a lower joint 30 is formed with a constant joint height, but also between the top 37 of the flange 38 and the bottom 26 of the balancing ring 15th ,

Fig. 5 zeigt einen Kanalschachtaufbau 42 mit einem Adapterring 43, bei dem sich ein Auflagering 44 zwischen einem Unterteil 45 eines Ausrichtkörpers 46 und einem hier als Ringsteg, der in den Rücksprung 40 des Ausgleichsrings 15 eingreift, ausgebildeten Oberteil 47 des Ausrichtkörpers 46 erstreckt. Fig. 5 shows a manhole assembly 42 with an adapter ring 43, in which a support ring 44 between a lower part 45 of an alignment body 46 and one here as a ring land, which engages in the recess 40 of the compensating ring 15, formed upper part 47 of the Ausrichtkörpers 46 extends.

Fig. 6 zeigt einen Kanalschachtaufbau 48 mit einem Adapterring 49, der einen Flanschring 50 aufweist, der sich mit einem radialen Innenteil 51 zwischen einem Oberteil 52 eines Ausrichtkörpers 53 und einem Unterteil des Ausrichtkörpers 53 erstreckt, das im vorliegenden Fall als eine mechanische Verbindungseinrichtung, beispielsweise eine Bolzenverbindung 54, ausgeführt ist. Wie durch den gestrichelten Linienverlauf angedeutet, kann auch im Fall des Adapterrings 49 der Flanschring 50 an seinem Außenrand mit einem Ringsteg 55 versehen sein, der in den Rücksprung 40 des Ausgleichsrings 15 eingreift. Fig. 6 1 shows a manhole structure 48 with an adapter ring 49 which has a flange ring 50 which extends with a radial inner part 51 between an upper part 52 of an alignment body 53 and a lower part of the alignment body 53, in the present case as a mechanical connection device, for example a bolt connection 54 , is executed. As indicated by the dashed line course, in the case of the adapter ring 49, the flange ring 50 can be provided at its outer edge with an annular web 55, which engages in the recess 40 of the compensating ring 15.

Aus einer Zusammenschau der Fig. 7 bis 9 wird deutlich, dass, wie hier am Beispiel des in den Fig. 1 und 3 dargestellten Adapterrings 16 erläutert, der Flanschring 25 auf seiner Oberseite 27 und seiner Unterseite 28 mit einer Oberflächenprofilierung 56 versehen sein kann, die im vorliegenden Fall aus konzentrischen Profilrillen57 und 58 und einander kreuzenden Profilrillen 59, 60 gebildet ist.From a synopsis of Fig. 7 to 9 becomes clear that, as shown here in the example of the Fig. 1 and 3 illustrated adapter ring 16, the flange 25 may be provided on its upper side 27 and its underside 28 with a surface profiling 56, which is formed in the present case of concentric Profilrillen57 and 58 and intersecting tread grooves 59, 60.

Darüber hinaus weist der Flanschring 25 Ausnehmungen 61, 62 auf, die Durchdringungsöffnungen ausbilden, durch welche eine unmittelbare Verbindung zwischen der oberen Fuge 29 und der unteren Fuge 30 ( Fig. 3 ) gegeben ist.In addition, the flange ring 25 recesses 61, 62, the penetration openings form, through which a direct connection between the upper joint 29 and the lower joint 30 (FIG. Fig. 3 ) given is.

Weiterhin ist es grundsätzlich auch möglich, dass abweichend von den Darstellungen der Adapterringe 16, 34, 43 und 49 deren Flanschringe auf der Oberseite und Unterseite mit beispielsweise als Materialvorsprünge ausgebildeten Abstandshaltern versehen sind, die eine exakte Einstellung der Fugenhöhe ermöglichen.Furthermore, it is also possible in principle that deviating from the representations of the adapter rings 16, 34, 43 and 49 whose flange rings are provided on the top and bottom with, for example, formed as material projections spacers that allow an exact adjustment of the joint height.

Claims (12)

  1. A manhole structure (10) comprising a manhole cone (12) and a compensating ring (15) for disposal between the manhole cone and a manhole cover (17),
    characterized in that
    the manhole structure has an adapter ring (16) having a supporting edge and an aligning body (20, 46) which is in its outside diameter adapted to the inside diameter of the manhole cone or of the compensating ring for forming a stack arrangement, which is secured against horizontal displacement, between the manhole cone and the compensating ring, the aligning body having an upper part (21, 47, 52) for engagement in the compensating ring and a lower part (23, 45) for engagement in the manhole cone, no direct engagement between the manhole cone (12) and the compensating ring (15) being required for this purpose and the supporting edge being formed in the transition between the upper part and the lower part radially on the outside of the aligning body.
  2. The manhole structure according to claim 1,
    characterized in that
    the supporting edge is formed as a flange ring (25, 38, 50) disposed in the transition between the upper part (21, 47, 52) and the lower part (23, 45).
  3. The manhole structure according to claim 2,
    characterized in that
    the flange ring (25, 38, 50) is realized as circular ring.
  4. The manhole structure according to any one of the preceding claims,
    characterized in that
    the aligning body (20) is realized as tubular sleeve.
  5. The manhole structure according to claim 4,
    characterized in that
    the tubular sleeve has a radial offset (32) in the transition from the lower part (23) to the upper part (21) in such a manner that the upper part has a bigger diameter d1 than the lower part and the supporting edge extends, starting from the upper part, radially toward the outside.
  6. The manhole structure according to any one of the preceding claims,
    characterized in that
    the supporting edge of the adapter ring (43, 49) extends at least partially between the lower part (45) and the upper part (47) of the aligning body (46, 53).
  7. The manhole structure according to claim 6,
    characterized in that
    the lower part of the aligning body (53) is realized as mechanical connecting device.
  8. The manhole structure according to claim 7,
    characterized in that
    the mechanical connecting device has at least two bolt connections (54) between the supporting edge and the manhole cone (12).
  9. The manhole structure according to any one of the preceding claims,
    characterized in that
    the supporting edge is provided with spacers on its upper side and/or its bottom side.
  10. The manhole structure according to any one of the preceding claims,
    characterized in that
    the supporting edge is provided with a surface profiling (56) on its upper side (27) and/or its bottom side (28).
  11. The manhole structure according to any one of the preceding claims,
    characterized in that
    the supporting edge has cutouts (61, 62).
  12. The manhole structure according to any one of the preceding claims,
    characterized in that
    a bottom side (28) of the supporting edge and an end face (14) of the manhole cone (12) extend parallel to each other in such a manner that a lower joint (30) having a constant joint height is formed between the supporting edge of the adapter ring (16) and the end face of the manhole cone, and that an upper joint (29) having a vertical height offset is formed between an upper side (27) of the supporting edge and a bottom side (26) of the compensating ring which is disposed on the supporting edge and is provided with a recess (40) which is formed at an outer edge of the bottom side, the supporting edge of the adapter ring being provided on its upper side with an annular web (39) which is formed at the outer edge (36) in such a manner that the annular web engages into the recess of the compensating ring in order to form an upper joint with a constant joint height.
EP15187428.6A 2015-02-03 2015-09-29 Manhole shaft structure Active EP3054055B1 (en)

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Publication number Priority date Publication date Assignee Title
CN108661082A (en) * 2018-06-11 2018-10-16 浙江瑞森路政设施有限公司 A kind of manhole operation well

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1942981A1 (en) * 1969-08-23 1971-03-11 Stewing Beton & Fertigteilwerk Manhole cover, in particular cable manhole cover

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2525285C3 (en) 1975-06-06 1979-09-27 Passavant-Werke Michelbacher Huette, 6209 Aarbergen Circular manhole component, especially a compensation ring for a road manhole
DE29601230U1 (en) * 1996-01-25 1996-03-07 Heinrich Meier Eisengießerei GmbH & Co KG, 32369 Rahden Transition piece for yard drains
US6811350B2 (en) * 2002-10-07 2004-11-02 Wayne John Nadasde Method and apparatus for adjusting the height and inclination of roadway and greenway appurtenances

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1942981A1 (en) * 1969-08-23 1971-03-11 Stewing Beton & Fertigteilwerk Manhole cover, in particular cable manhole cover

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