EP0821111A2 - Prefabricated concrete manhole element with a plastic liner - Google Patents

Abstract

The ready-made concrete shaft has a double-walled sealed pipe (4) in at least one wall opening. The pipe has a concrete outer and a plastics inner liner, the end of which is held inside the shaft opening. The inner liner is exposed over a sealing section and the concrete outer pipe projects into the shaft wall opening by a shorter distance than the exposed section. This opening has a plastics sleeve which converges from the outside to the shaft inside in at least three steps, forming a compatible socket with a shoulder for the pipe end. At least one sealing ring fits between the sleeve and the pipe. The shaft has a plastics inner liner (2).

Description

• der in wenigstens einer, die Schachtwand durchdringenden Schachtwandöffnung ein Doppelwandrohr abgedichtet trägt,
  • das aus einem Beton-Außenrohr und einem Kunststoff-Inliner-Rohr besteht und dessen Ende in der Schachtöffnung gehalten ist,
  • wobei das Kunststoff-Inliner-Rohr über eine Dicht-Strecke freiliegt und das Beton-Außenrohr mit einer Einsteckstrecke vom Betonmantel aus in die Schachtwand-Öffnung hineinragt,
  • .. wobei die Schachtwand-Öffnung mit einer Kunststoffmanschette ausgekleidet ist, die zum Schachtinneren abgestuft konvergiert und wenigstens drei Stufen aufweist, die eine kompatible Einfassung für das Ende und deren eine Stufe einen Anschlag für eine Spitze des Doppelwand-Rohrs bildet, und
  • .. wobei Wenigstens eine Ringdichtung zwischen Manschette und Abzweigstutzen einbringbar ist, und
• der einen Kunststoff-Schacht-Inliner zur Auskleidung des Schachtinneren aufweist.

The invention relates to a precast concrete manhole,

• which carries a double wall tube sealed in at least one shaft wall opening penetrating the shaft wall,
  • which consists of a concrete outer pipe and a plastic liner pipe and the end of which is held in the shaft opening,
  • the plastic inliner pipe is exposed over a sealing section and the concrete outer pipe protrudes into the shaft wall opening with an insertion section from the concrete jacket,
  • .. wherein the shaft wall opening is lined with a plastic sleeve that converges in steps towards the interior of the shaft and has at least three steps, a compatible border for the end and one step forming a stop for a tip of the double-wall pipe, and
  • .. whereby at least one ring seal can be inserted between the collar and branch connector, and
• which has a plastic shaft inliner for lining the inside of the shaft.

A precast concrete shaft of the type mentioned at the beginning is known from DE 91 15 399 U1, whose interior with is lined with a plastic shaft liner and of the wall openings, in which a plastic sleeve is arranged. The plastic cuff is graduated and with the plastic shaft liner connected. In the shaft openings lined in this way can be inserted a double wall pipe, the Tip the plastic inner tube over a line of sight is exposed.

This precast concrete shaft designed in this way has become proven. Inserting the tip of the plastic inner tube into the plastic sleeve with surrounding seals is, however, through the concrete jacket of the double wall pipe difficult. Because the view is obstructed is not always a complete seal between the plastic inner tube and the plastic sleeve possible with the inserted seals. Another The disadvantage is that the interior of the shaft and the shaft wall opening are only partially lined. This can Groundwater is pressed into the inside of the shaft, causing too leads to an additional burden on the sewage treatment plants.

From DE 33 38 030 A1 there is a connecting sleeve for connection of a sewer pipe to a manhole. The connecting sleeve extends from the inside of the manhole to the outer coat and is stepped. However, it only serves the purpose of opening the shaft wall when inserting the concrete sewer pipe from damage to preserve.

The task is therefore a precast concrete manhole of the type mentioned at the beginning develop that it is close to groundwater and the double wall pipe securely into the shaft wall opening can be pushed.

• daß der Kunststoff-Schacht-Inliner das Schachtinnere bis wenigstens zum äußeren Betonmantel und die Kunststoffmanschette die Schachtwandöffnung vom Kunststoff-Inliner ebenfalls bis wenigstens zum äußeren Betonmantel auskleidet und
• daß die Sichtstrecke länger als die Einsteckstrecke ist.

According to the invention, the object is achieved by

• that the plastic shaft inliner also lines the inside of the shaft up to at least the outer concrete jacket and the plastic sleeve the shaft wall opening from the plastic inliner to at least the outer concrete jacket and
• that the line of sight is longer than the insertion distance.

The advantages achieved with the invention are in particular in that the plastic inner lining of the Precast concrete manhole at least down to its concrete jacket is brought up. This is the on Groundwater pressing groundwater concrete at all shaft openings, d. H. the shaft interior and the shaft wall opening a water barrier in the form of a plastic liner or a plastic sleeve opposite. Groundwater pressing on the precast concrete shaft and then up on the plastic liner again directed outside into the ground. An intrusion into the sewage system and an additional burden on the Sewage treatment plants are thus effectively avoided. On the other hand a drainage of the dirty water into the soil a tightly fitting insertion of the drain pipe and the Full lining of the precast concrete shaft in the Shaft wall opening through the exposed line of sight avoided.

Because the line of sight is greater than the insertion distance the exposed plastic inliner tube inserted into the seals. The Concrete outer tube restricts this very essential Laying process does not block the view.

The plastic shaft liner and the sleeve can each end with a jacket edge on the concrete jacket. This will make it clear and effective Barrier against groundwater pressing from outside.

The plastic manhole liner and the cuffs can be molded as a one-piece plastic part. This one-piece plastic part then only needs in the outer jacket made of concrete. Leakage between the individual parts becomes so much effectively avoided. The plastic shaft liner and the cuffs can also be used individually get connected. In this case, the connection can by gluing or welding. A subsequent connection of the cuff to the Plastic manhole inliner is particularly useful if there is a further shaft wall opening afterwards be created for another drain pipe got to.

Sealing is a special focus between the inserted into the shaft wall opening Plastic sleeve and the exposed plastic inner tube and the concrete outer pipe. One can do this Ring seal around the respective partial pipe of the double wall pipe be placed.

The one around the exposed plastic liner pipe Ring seal can be from a seal holding chamber be kept. Here, the middle of the three levels at least partially designed as a seal holding chamber be. This ensures that the ring seal when inserting the exposed plastic inliner tube is held securely and their sealing properties can be fully effective.

The ring seal around the concrete outer pipe can be a rolling ring or be an elastomeric sealing profile.

The ring seal around the exposed inner tube can be a Form an elastomeric sealing profile. Because of the trained Double sealing becomes a very effective seal of the drain pipe in the precast concrete shaft.

Fig. 1

einen Schachtaufbau in einer teilweise geschnittenen perspektivischen Darstellung,

Fig. 2

eine Einzelheit II aus einem Schachtaufbau gemäß Fig. 1 in einer vergrößerten Schnittdarstellung und

Fig. 3

einen Teilschnitt durch ein Schachtunterteil eines Schachtaufbaus gemäß Fig. 1 entlang der Ebene III - III.

An embodiment of the invention is shown in the drawing and will be described in more detail below. Show it:

Fig. 1

a shaft structure in a partially sectioned perspective view,

Fig. 2

a detail II of a shaft structure according to FIG. 1 in an enlarged sectional view and

Fig. 3

a partial section through a lower shaft part of a shaft structure according to FIG. 1 along the plane III - III.

A shaft structure is shown in Fig. 1. It consists of a manhole base 100 and above Manhole rings 101, which are manufactured as precast concrete parts are.

The shaft lower part has, as shown in FIGS. 1 to 3, a shaft wall 1 with a thickness C made of concrete. Be The interior of the shaft 23 is from the channel 12 'over its berm 19 completely with a plastic shaft liner 2 lined that in a coat edge 24 on his Coat 18 ends.

The lower shaft part 100 has two opposite ones Provide shaft wall openings 12. Each of the Manhole wall openings 12 is with a plastic sleeve 3 lined. The plastic sleeve 3 is with the plastic shaft liner, as shown in FIG. 2, firmly connected. It is graduated and shows after connection with the plastic manhole liner 2 a lowest level 14. This is followed by one second stage, which is designed as a seal holding chamber 15 and a third stage 16 above. The Plastic sleeve 3 ends in a fourth stage 17 on the outer concrete jacket 18 and thus forms at the same time a jacket edge 24 '.

In the shaft wall opening 12 lined in this way there is a Double wall tube 4, as shown in FIGS. 1 and 2, arranged. The double wall pipe 4 consists of a concrete outer pipe 5 and a plastic liner tube, in the following referred to as plastic inner tube 6. The end 4 'of Double wall pipe 4 is exposed over a line of sight A. with its plastic inner tube 6 and over an insertion distance B with its concrete outer tube 5 in the with Plastic sleeve 3 lined shaft wall opening 12. It is essential to the invention that the line of sight A is greater than the insertion distance B.

The plastic inner tube 6 abuts with its tip 11 to the lowest level 14 of the plastic sleeve 3. The second stage is in the seal holding chamber 15 between the plastic sleeve 3 and the plastic inner tube 6 placed a sealing profile 7. In the field of third stage 16 is sealing around the concrete outer tube 5 compared to the plastic sleeve 3, a rolling ring or Slide ring (elastomeric seal) 8 placed.

The sealing profile 7 is, for example, a so-called GS ring from Denso-Chemie Wedeking KG, Leverkusen. Such sealing profiles are created to be larger Bridge fluctuations in the gaps to be sealed. The seals 7 and 8 are squeezed in and shown in compressed form.

The concrete outer tube 5 is 16 in relation to the third stage spaced with a gap 9. But it is also possible that the concrete outer tube to the third stage 16 at the same time belching with the tip 11 on the first step 14 can.

The cuff 3 is connected with the help of connections 10 the plastic shaft liner 2 connected. The connecting can be done by gluing or welding. It is cheaper if the plastic shaft liner 2 and the outgoing plastic cuffs 3 as a plastic liner is formed.

When manufacturing the manhole base 100 is around one-piece plastic liner 2, 3 the outer Shaft wall 1 cast. To the plastic liner to be able to effectively connect to the shaft wall 1 a holding spiral 22 below the jacket edge 24 to be ordered. To that with the plastic shaft inliner lined to the edge of the coat 24 Chess ring tip end 21 becomes a chess ring seal 20 placed.

The lower part of the shaft designed in this way becomes like FIG. 1 shows, on the bottom of an excavated pit in one Channel put on. Be 100 on the manhole base successively manhole rings 101 on the end of his manhole ring 21 put on. You can also use a plastic shaft liner in the way described be lined.

• Sichtstrecke A größer Einsteckstrecke B und
• Aufstoßen der Spitze 7 auf der untersten Stufe 14 das abdichtende Einschieben des jeweiligen Doppelwandrohrs 4 in die jeweilige Schachtwandöffnung 12 abgeschlossen. Der Schacht und die in ihn hineinführenden Doppelwandrohre 4 sind somit nach außen dicht. Das mit einer Strömungsrichtung S fließende Abwasser kann so durch die Doppelwandrohre 4 über das Gerinne 12' im Schachtunterteil 100 und weiter durch das weitere Doppelrohr 4 zum Klärwerk so abgeleitet werden, daß es das Grundwasser nicht verunreinigt.

The double wall pipe 4 is inserted with its prepared end 4 'into the shaft wall opening 12 lined with the plastic sleeve 3. The plastic inner tube 6 exposed over the visible distance A is pushed into the sealing profile 7 lying in the seal holding chamber 15 on the second stage. During the insertion process, the clear line of sight A ensures that the exact penetration of the tip 11 into the sealing profile 7 can be observed. The sealing encircling of the concrete outer pipe by the seal 8 can also be observed thereafter. If the double wall pipe with the tip 11 hits the lowest step 14, this is due to the very essential assembly aids

• Line of sight A greater insertion distance B and
• Butting of the tip 7 on the lowest step 14 completes the sealing insertion of the respective double wall pipe 4 into the respective shaft wall opening 12. The shaft and the double wall pipes 4 leading into it are thus sealed to the outside. The wastewater flowing with a flow direction S can thus be discharged through the double wall pipes 4 via the channel 12 'in the lower shaft part 100 and further through the further double pipe 4 to the sewage treatment plant in such a way that it does not contaminate the groundwater.

On the other hand, the complete lining of the Manhole base 100 with the plastic lining 2, 3 for that pressing from the outside on the manhole base Groundwater does not get into the interior of the shaft 23 can. The groundwater W marked with the arrows can on a conventional manhole base whose shaft wall 1 press that 20 to 30 l per minute can get inside the shaft. Through this enormous Inflow of groundwater becomes much more water passed through the drainage system when dirty water accumulates. The for cleaning the incoming dirty water responsible sewage treatment plants are in this way and Way unnecessarily burdened. By completely undressing of the lower shaft part 100 down to its concrete jacket such penetration of the groundwater W becomes effective prevented. If the water table is very high, is it is advantageous if the overlying manhole rings 101 also in the manner described except for provided their outer concrete jacket with an inliner will. Between the lower shaft part 100 and the one above it arranged shaft rings 101 provide shaft ring seals 20 for effective sealing.

Claims (8)

Precast concrete shaft, which carries a double wall pipe (4) sealed in at least one shaft wall opening (12) penetrating the shaft wall (1), which consists of a concrete outer pipe (5) and a plastic inliner pipe (6) and the end (4 ') of which is held in the shaft opening (12), the plastic inliner pipe (6) being exposed via a sealing section (A) and the concrete outer pipe (5) with an insertion section (B) protruding from the concrete jacket (18) into the shaft wall opening (12), .. wherein the shaft wall opening (12) is lined with a plastic sleeve (3) which converges to the inside of the shaft (23) and has at least three steps (14, 15, 16, 17) which have a compatible border for the end and whose one step (14) forms a stop for a tip (11) of the double-wall pipe (4), and .. wherein at least one ring seal (7; 8) between the sleeve (3) and branch connector (4) can be inserted, and which has a plastic shaft inliner (2) for lining the shaft interior (23),
characterized, that the plastic shaft liner (2) the shaft interior (23) to at least the outer concrete jacket (18) and the plastic sleeve (3) the shaft wall opening (12) from the plastic liner (2) also to at least the outer concrete jacket (18) lines and that the line of sight (A) is longer than the insertion distance (B). Precast concrete manhole according to claim 1, characterized characterized in that the plastic manhole liner (2) and the cuff (3) each with a jacket edge (24, 24 ') on the concrete jacket (18). Precast concrete manhole according to claim 1 or 2, characterized characterized in that the plastic manhole liner (2) and the cuffs as a one-piece plastic part molded or sealed together, in particular are glued or welded. Precast concrete manhole according to one of claims 1 to 3, characterized in that an annular seal (7, 8) around the exposed plastic inliner tube (6) and is placed around the concrete outer tube (5). Precast concrete manhole according to one of claims 1 to 4, characterized in that the exposed Plastic inliner tube (6) horizontal ring seal (7) is held by a seal holding chamber. Precast concrete manhole according to one of claims 1 to 5, characterized in that the middle of the three Steps at least partially as a seal holding chamber (15) is formed. Precast concrete manhole according to one of claims 1 to 6, characterized in that the ring seal around the Concrete outer tube (5) a rolling ring (8) or is an elastomeric sealing profile. Precast concrete manhole according to one of claims 1 to 7, characterized in that the ring seal around the exposed inner tube (6) an elastomeric sealing profile (7) is.

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