EP0648901B1 - Method and device for connecting road gullies with a rainwater channel or a sewer - Google Patents

Abstract

A flexible hose section (14) is placed between an outlet aperture (18) of the road gully (6) and an intake aperture (24) of the storm sewer (10), resp. an inspection shaft connected to the sewer. An independent sewage pipe is also installed between these two apertures. The flexible hose is a one-piece section, which is cut off a length. Either hose end is connected via a connection socket (48). It is installed, so that it has a drop to the road (6) at every point. It is passed around cables (26) etc. in the road.

Description

The invention relates to a method for connecting Street drains or the like to a lower-lying rain or sewer, being between the outlet opening of the street gully or the like and an entry opening of the rain or sewage canal or one with the rain or Sewer connected control shaft at least one flexible piece of hose is laid.

In addition, the invention relates to a device for the process of rain or sewage with one with an outlet opening provided street drain or the like, one with an entrance opening provided lower rain or Sewer or one with the rain or sewer connected control shaft and one between the outlet opening and the sewage pipe installed at the inlet, wherein the sewage pipe has at least one flexible piece of hose includes.

Especially in the course of renovation work or at a The wastewater pipes, the street drains arranged near the curb to a usually several meters below the Run a rain or sewer that runs at street level, at least partially relocated to match the new Adapt conditions. Often stoneware pipes are used used for decades as sewage pipes Find use. For some time now, too PVC pipes are used, especially when the sewage pipes over longer distances and essentially straight run. However, this is often the case with renovation measures not the case since a lot of in under the street different depths and directions laid electricity and Telephone cables, fresh water, gas and district heating lines, as well sewage pipes leading to the surrounding households a repeated change of direction of the new sewage pipes make necessary. This has the consequence that the sewage pipes are composed of a large number of sections must be delivered, with the delivered in standard lengths Parts still have to be shortened in part the sewage pipes without tilting the sections of the Road drain to the rain or sewer or to an in Inspection shaft arranged in the rain or sewage canal respectively. The laying of such sewage pipes from glazed stoneware pipes or from PVC pipes therefore, especially in the case of renovation work high workload and is accordingly expensive.

Further disadvantages of composed of several sections Wastewater pipes are found especially in glazed stoneware pipes in their susceptibility to breakage when settlements occur, as well as in their susceptibility to destruction Root system, which is looking for water in the area of Penetrate sleeve connections between the individual sections and in this area to blockage of the sewage pipes and in serious cases to push the Can lead sections.

From the Canadian patent CA-A-1 265 692 is known Street drains to one by means of sewage pipes Connect rain or sewer. A reference to flexible laying of the sewage pipes in contrast, does not take place.

Furthermore, it has become known from US-A-3 160 425 in a rigid pipe pulling in a flexible hose, whose outer cross section is as close as possible to the inner cross section corresponds to the rigid pipeline. This flexible hose from end to end through the pipeline drawn. The hose protrudes from both of its ends neighboring ends of the pipeline and is in the respective ends of the pipeline through an expansion ring clamped.

With this combination of the hose and the pipeline should be achieved that wastewater from a house flows through the inside of the hose into a collector. On in this way, the water flowing out does not reach the inner wall the pipeline and therefore not in the area a two pieces of piping on a coupling coupling. This is to ensure that an absolutely tight connection comes from which no moisture in the neighboring Soil can penetrate.

With regard to the use of a rigid pipe is one flexible laying of the pipeline completely impossible. Rather, the rigid pipeline must be made using different Bends and any obstacles present in the ground be led around.

Finally, GB-A-2 283 796 is a rigid installation, For example, a drainage pot has become known, with regard to its rigid construction with the water of one Road surface receiving water inlet comparable is. It has a bend at its outlet, which is used for discharge of water a variety of interconnected has cylindrical tube parts sealed against one another, which are slidably arranged against each other, namely both in terms of straight-line movements and those that take place on an arch. An indication of use a long connecting hose does not take place.

Proceeding from this, the invention is based on the object a method and an apparatus of the type mentioned to develop that ensure greater flexibility and where the above disadvantages are avoided.

This object is achieved according to the method of the invention solved in that the hose piece in the ground on a Layed of gravel, sand or the like or in a bed made of a hardening by setting or cooling Material is embedded and the flexible hose piece in Form of bulk goods rolled up or delivered on drums is and only at the construction site in the previously by measuring determined lengths is separated.

With regard to the device, the object is achieved in that the piece of hose in the ground on a layer of gravel, Layed sand or the like or into a bed from one through Setting or cooling hardening material is embedded, and the flexible piece of hose made of one with at least one a material provided with a fabric insert.

By using flexible hose pieces, the Sewage pipe quickly and easily laid around obstacles and at least in the area of the hose section Junctions and the disadvantages associated with them be avoided. Between the exit of the street gully and the inlet opening of the rain or sewage canal or the control shaft, the sewage pipe becomes independent from a given routing with a single uninterrupted piece of tubing that runs between the street drain and the rain or sewer canal. Because the hose is flexible and reinforced with a fabric insert in rough operation of an excavation pit Application of comparatively large forces can be relocated as it due to the prevailing local Ratios is best possible. By laying the Hose on a layer of gravel, sand or the like or in a bed from a hardening material by setting or cooling it is achieved that the hose everywhere on a firm support rests, so that a partial sinking into individual Is prevented.

To prevent due to measurement errors in the length measurement a piece of hose that is too short is cut off, which later u. U. is no longer usable, sees another advantageous embodiment of the invention that a Hose piece is separated, the length of which is slightly greater than is the measured distance. When laying the hose section will then be where there is the dimensions of the construction pit allow and where the slope does not decrease unacceptably the radius of curvature of an arc in the hose line slightly enlarged or the hose on a straight Slope section laid with one or two curves, so that this difference in length can be easily compensated. The caused by the somewhat longer length of the hose section Reduction of the gradient for a given height difference between the exit opening of the street gully and the entry opening of the rain or sewer is at least Larger distances or differences in height are usually negligible.

A further advantageous embodiment of the invention provides before that the piece of hose unilaterally at its lower end with one in the rain or sewer or in the control shaft opening connecting piece connected and before there out to the exit of the street gully, so that the piece of hose has a predetermined minimum gradient at every point having.

The hose receives a firm base from its support from gravel or sand or in a hardening material, preferably made of concrete, the support or the bed for the hose piece before laying with a corresponding slope is being prepared.

A hose is expediently used in each case, that is not easy to bend or squeeze, however, this can further increase the risk of cross-sectional narrowing be prevented that the piece of hose when laying is covered or covered with concrete. This can be advantageous either do so that after laying so much Concrete is poured onto the piece of hose that this at least most of the weight of the overlying ones Picks up layers of earth. Alternatively, the Piece of tubing around a closed wrap made of a thin flexible material, for example from a burlap or made of a stable plastic film, whose Inner cross-section larger than the outer cross-section of the hose section is, so that at the upper end one between the tube piece and the encased concrete filled the space between the peripheral surface of the hose piece and the sheath fills and forms a concrete jacket after curing. By embedding the hose piece in concrete, a sewage pipe becomes manufactured that have a comparable compressive strength like conventional sewage pipes made of glazed stoneware has, however, in contrast to these no connection points has and also in one example breakage caused by subsidence does not lead to leakage of rainwater in the subsurface, since the fracture passes through bridged the hose arranged inside the concrete jacket and is sealed.

The piece of tubing is expediently laid with a connecting pieces arranged at the outlet opening of the street gully connected. The connection between the hose section and connecting piece can both on the street drain also on the rain or sewage canal or on the inspection shaft done that the end of the hose piece over the after outside via a wall of the street drain or sewer protruding connecting piece pushed and for example with a hose clamp is attached to the connecting piece. Such a, relatively little labor-intensive and Inexpensive solution is particularly suitable for attaching the Piece of hose on a connecting piece of the street drain, because with this solution there is no cross-sectional narrowing in the flow direction occurs. In order to narrow the cross-section in the area of Entry opening of the rain or sewage canal or the inspection shaft to avoid the hose piece with his lower end in a connecting flange or a coupling element be introduced, which then with an appropriate Flange or coupling element on the rain or sewer or preferably releasably connected to the control shaft becomes. For the purpose of connection and sealing, a annular space between the outside of the Hose piece and an inner wall of the connecting piece preferably with a hardening bituminous sealant be filled. Through both the hose piece as well a connecting piece or a sleeve comprising a fitting cross-sectional narrowing can also be avoided.

While especially with new relocations as well as with more extensive ones Refurbishment work preferably the entire distance between the exit opening of the street gully and the entry opening of the rain or sewer through a flexible Hose section is bridged, it can be used for minor renovation work, where, for example, only the street gullies be moved, more appropriate, that of the street gully opposite lower end of the hose piece into an existing Introduce pipeline and open the pipeline to seal against the hose piece. Especially then if the existing pipeline is essentially straight runs and has a sufficiently large cable diameter, it may be advantageous to use the lower end of the tube piece inside the pipeline to close to it Junction in the rain or sewage canal or in the inspection shaft to push and thus the pipeline at the same time to renovate. With kinking pipelines that push through of the hose section, as well as at Pipes with a small inner diameter (because of the further reduction of the cross section) it is more appropriate, however lower end of the hose section only as far into the pipeline introduce that sealing is possible.

Fig. 1:

Einen Querschnitt durch eine Straße mit einem Regenwasserkanal und einem mit diesem über eine einstückig verlegte Abwasserleitung verbundenen Straßenablauf,

Fig. 2:

Einen Querschnitt durch eine Baugrube in einer Straße mit einem Regenwasserkanal und einem Straßenablauf,

Fig. 3:

Einen Querschnitt durch eine Baugrube in einer Straße mit einem Regenwasserkanal, einem Kontrollschacht und einem Straßenablauf,

Fig. 4:

Einen Querschnitt durch ein in einem Betonbett verlegtes Schlauchstück,

Fig. 5:

Einen Querschnitt durch ein Schlauchstück mit einer mit Beton gefüllten Umhüllung,

Fig. 6:

Einen Längsschnitt durch einen Anschlußstutzen im Bereich des Straßenablaufs und

Fig. 7:

Einen Längsschnitt durch einen Anschlußstutzen im Bereich des Regen- oder Abwasserkanals.

The invention is explained in more detail below with reference to a number of exemplary embodiments shown schematically in the drawing. Show it:

Fig. 1:

A cross-section through a street with a rainwater channel and a street drain connected to it via an integral sewage pipe,

Fig. 2:

A cross section through an excavation pit in a street with a rainwater channel and a street drain,

Fig. 3:

A cross section through an excavation pit in a street with a rainwater channel, a control shaft and a street drain,

Fig. 4:

A cross section through a piece of hose laid in a concrete bed,

Fig. 5:

A cross section through a piece of hose with a covering filled with concrete,

Fig. 6:

A longitudinal section through a connecting piece in the area of the street gully and

Fig. 7:

A longitudinal section through a connecting piece in the area of the rain or sewer.

The derivation devices shown in the drawing of rainwater hitting a road surface (2) essentially from along the curbs (4) in regular Intervals arranged street drains (6), each over a sewage pipe (8) with a greater depth under the Road-guided rainwater canal (10) or with one of several at greater intervals along the rainwater canal (10) arranged control shafts (12) are connected.

The waste water pipe (8) each has an integral, flexible tube piece (14), the upper end (16) connected to an outlet opening (18) of a street gully (6) is. The lower end (20) of the hose section (14) can, as shown in Figures 1 and 3, at its inlet opening (24) directly into the rainwater channel (10) or into one of the inspection shafts (12) open, or, as shown in Figure 2, in a pipe (22) leading to the rainwater channel (10), so that it is, for example, in the course of a road widening does not relocate the street gullies (6) absolutely necessary, the construction pit (2) to the rainwater channel (10) to dig out.

The use of a flexible piece of hose (14) as a sewage pipe (8) it facilitates the sewage pipe (8) between existing obstacles, for example between along the Street laid gas or district heating lines (24) and electricity and Telephone cables (26) or the like through or around this Lay obstacles around without having to change direction several times as with the well-known stoneware or PVC pipes the installation of a large number of kinked or curved sections makes necessary, which on the one hand the workload when laying and secondly the vulnerability of the sewage pipe (8) reduced against destruction caused by penetrating root system becomes.

That between the street drain (6) and the rainwater channel (10) or the control shaft (12) laid hose section (14) is in Form of bulk goods rolled up or available on drums and is only determined at the construction site in the previously measured Lengths separated. The supplied hose material With a nominal diameter of usually 150 mm, both made of vulcanized rubber as well as a flexible plastic material exist and preferably has one or more fabric inserts (26), which on the one hand increase the tensile strength, and on the other hand together with a correspondingly large wall thickness help reduce the resistance of the hose to one possible kinking or compression by vertical or increase lateral forces. On the other hand, however, the strength not be too large, otherwise the minimum radius of curvature increases too much and thus the flexibility when laying is reduced.

In order in any case to compress the tube piece (14) through the earth that has been heaped up over it the tube piece (14) over its entire length or on one Part of its length due to prefabricated concrete half-shells covered above or fully or partially embedded in precast concrete in this case, the soil above is only filled after the precast concrete has hardened. there can, as shown in Figures 2 and 4, first Ballast bed (32) prepared on the base (60) of the excavation pit (21) whose gradient is in the entire range between the Street drain (6) and the rainwater canal (10) or the junction a predetermined minimum gradient into the pipeline (22) exceeds. A bed can then be made on the ballast bed (32) Precast concrete (33) are applied, in which the piece of hose (14) embedded with its underside before tying becomes. Depending on the consistency of the prefabricated concrete (33) can be immediately afterwards or after a certain hardening time of further ready-mixed concrete (33) on the already partially embedded piece of hose (14) are applied, the vertical after curing and absorbs lateral pressure, so that that surrounded by the concrete (33) Hose section (14) cannot be compressed.

A concrete jacket with a given, uniform wall thickness can can also be achieved in that the piece of hose (14), as shown in Figure 5, with an envelope (30) from a thin, flexible and tear-resistant material, for example made of Sack canvas or surrounded by a stable plastic film is, before laying the piece of hose (14) over this pulled and after laying the covered hose piece (14) closed on a ballast bed (32) at its lower end and is filled with concrete (33) from above. Such a concrete jacket (27) is particularly useful if the Hose section (14) has a relatively large gradient, so that the concrete poured into the casing (30) at the upper end by itself between this and the hose section (14) flows down.

For connecting the hose section (14) to the outlet opening (18) of the street drain (6) has the street drain (6) at the in the embodiment shown in Figures 1 and 6 an in inserted the outlet opening (18) which is inclined downwards Push-on sleeve (34) into which, for example, an existing PVC Fitting piece (36) is inserted so that there is an outside Connection pieces (48) protruding from the street gully (6) forms. The adapter (36) has an outer diameter that the inner diameter of the hose section (14) essentially corresponds so that this after application of a lubricant, for example made of silicone, with its upper end (16) one piece pushed far over the adapter (36) and with a hose clamp (38) or hose clamp can be secured on this can. Around the seat of the hose piece (14) on the fitting piece (36) To improve, this can also be a ring-shaped circumferential Have notches provided peripheral surface.

Instead of a fitting inserted into a push-in sleeve (34) (36) can already during the manufacture of the street gully (6) the outlet (18) enclosing connection piece (48) in the shaft floor (39) or in a ring of the street drainage shaft (40) can be concreted, with which the upper end (16) of the hose piece is connected.

In the embodiment shown in Figure 3, the Shaft (40) of the street gully (6) has a protruding outside Screw connection flange (42) on which after laying of the tube piece (14) the upper with a corresponding Screw flange (44) connected end (16) releasably attached becomes.

The lower end (20) of the hose section (14) opens there a control shaft (12) so that for maintenance or cleaning work access to the lower end (20) of the hose section (14) is possible. The connection between the hose section (14) and the control shaft (12) can, shown in Figure 3, in that the lower end (20) of the tube piece (14) in a diagonally outwards and upwards over a ring segment (46) of the control shaft (12) connecting piece (48) is introduced, the inside diameter of which is the outside diameter corresponds to the hose section (14) or slightly larger than whose outside diameter is. A possibly remaining annular gap can be sealed by a rubber seal or by sealant become.

When relocating one directly into a rainwater channel (10) opening, formed by a piece of hose (14) Waste water pipe (8) can the rainwater channel (10) on it Top or as shown in Figure 7 on his shoulder a diamond core bit are drilled, the diameter of which Corresponds to the inner diameter of the hose section (14). Subsequently can, as shown, a prefabricated connection piece (48) with one of the convex peripheral surface (50) of the rainwater channel (10) corresponding contact surface (52) so on the Circumferential surface (50) of the rainwater channel (10) are glued on, that the longitudinal axis of the bore (54) with the longitudinal axis of a Receiving opening (56) is aligned, in which the lower end (20) of the Hose piece (14) is inserted until it with its front Face in the area of the bore (54) against the peripheral surface (50) strikes. To connect the hose section (14) with the connecting piece (48) and for sealing the connection can an elastic sealant (58) in the annular gap between the receiving opening (56) and the hose section (14) filled become. One pulled over the hose section (14) tubular wrapping made of burlap (30) was opposite there sealed the peripheral surface of the connecting piece (48), before the concrete (33) from the upper end (16) of the hose section filled between the tube piece (14) and the sheath (30) has been.

Claims (45)

1. Method of connecting road gullies (6) or the like to a lower-lying rain sewer or drain (10), at least one flexible tube section (14) being laid between the outlet (18) of the road gully (6) or the like and an inlet (24) of the rain sewer or drain (10) or of a monitoring shaft (12) connected to the rain sewer or drain (10), characterized in that the tube section (14) is laid in the earth on a base comprising gravel, sand or the like or is embedded into a bed comprising a material hardening by setting or cooling and the flexible tube section (14) is supplied rolled up in the form of piece goods or on drums and only at the construction site is cut into the lengths calculated previously by surveying.
2. Method according to claim 1, characterized in that a wastewater pipe (8) is laid in one piece between an outlet (18) of the road gully (6) and an inlet (24) of the rain sewer or drain (10) or of a monitoring shaft (12) connected to the rain sewer or drain (10), independent of a predefined pipeline direction.
3. Method according to claim 1 or 2, characterized in that a single continuous tube section (14) is laid between the road gully (6) and the rain sewer or drain (10) or the monitoring shaft (12).
4. Method according to one of claims 1 to 3, characterized in that the required length of tube section (14) is cut from a longer tube section prior to laying.
5. Method according to one of claims 1 to 4, characterized in that the tube section (14) is connected on one side at its lower end (20) to the rain sewer or drain (10) or to the monitoring shaft (12) and laid relative to the road gully such that it displays a gradient at every point.
6. Method according to one of claims 1 to 5, characterized in that the tube section (14) is diverted round obstacles such as cables (26) or pipes (24).
7. Method according to one of claims 1 to 6, characterized in that the tube section (14) is connected at its lower end (20) to a branch piece (48) opening into the rain sewer or drain (10) or into the monitoring shaft (12) and connected thereto.
8. Method according to one of claims 1 to 7, characterized in that the tube section (14) is connected at its upper end (16) to a branch piece (48) positioned at the outlet (18) of the road gully (6).
9. Method according to claim 8, characterized in that the tube section (14) is pushed with its end (16) over the branch piece (48) projecting outwards over the road gully (6), the rain sewer or drain (10) or the monitoring shaft (12) and is secured in non-displaceable manner to the branch piece (48).
10. Method according to claim 8 or 9, characterized in that the tube section (14) is secured to the connection point (48) by a tube clamp (38).
11. Method according to one of claims 1 to 10, characterized in that a connection flange (44) is secured at at least one of the ends (16, 20) of the tube section (14).
12. Method according to claim 11, characterized in that the connection flange (44) connected to the tube section (14) is connected to a flange (42) positioned at the road gully (6) and/or at the rain sewer or drain (10) or at the monitoring shaft (12).
13. Method according to one of claims 1 to 12, characterized in that a coupling element is secured to at least one of the ends (16, 20) of the tube section (14).
14. Method according to claim 13, characterized in that the coupling element connected to the tube section (14) is connected to a coupling element positioned at the road gully (6) and/or at the rain sewer or drain (10).
15. Method according to one of claims 1 to 14, characterized in that the lower end (20) of the tube section (14) is introduced into a pipeline (22) opening into the rain sewer or drain (10) or the monitoring shaft (12).
16. Method according to claim 15, characterized in that the tube section (14) is pushed inside the pipeline (22) up to the proximity of the point where the pipeline (22) discharges into the rain sewer or drain (10) or the monitoring shaft (12).
17. Method according to claim 15 or 16, characterized in that the tube section (14) is sealed off from the pipeline (22).
18. Method according to one of claims 1 to 17, characterized in that the tube (14) is provided towards the top with a casing comprising gravel, sand or the like.
19. Method according to one of claims 1 to 17, characterized in that the tube section (14) is embedded over at least part of its length into a bed comprising concrete (33).
20. Method according to one of claims 1 to 19, characterized in that, before the hardening of the material (30), the tube section (14) is laid onto the latter and is partially embedded therein.
21. Method according to claim 20, characterized in that further material (30) is then poured onto the partially embedded tube section (14).
22. Method according to one of claims 1 to 21, characterized in that the material (30) is poured into a casing (30), surrounding the tube section (14), the internal cross-section of which is greater than the external cross-section of the tube section (14).
23. Method according to claim 22, characterized in that the casing (30) is sealed off at its lower end from the tube section (14), a branch piece (48), a connection flange (42) or a coupling element.
24. Method according to claim 22 to 23, characterized in that the material (30) is poured in viscous or pasty form at the upper end of the casing (30).
25. Device for diverting rain or waste water with a road gully (6) or the like provided with an outlet (18), a lower-lying rain sewer or drain (10) provided with an inlet (24) or a monitoring shaft (12) connected to the rain sewer or drain (10) and a wastewater pipe (8) laid between the outlet (18) and the inlet (24), the wastewater pipe (8) comprising at least one flexible tube section (14), characterized in that the tube section (14) is laid in the earth on a base comprising gravel, sand or the like or is embedded in a bed comprising a material hardened by setting or cooling, and the flexible tube section (14) consists of an elastic material provided with at least one fabric insert (26).
26. Device according to claim 25, characterized in that the wastewater pipe (8) can be laid in one piece independent of a predefined pipeline direction.
27. Device according to claim 25 or 26, characterized in that the tube section (14) extends from an outlet (18) of the road gully (6) essentially up to an inlet (24) of the rain sewer or drain (10).
28. Device according to one of claims 25 to 27, characterized in that the tube section (14) is developed in one piece.
29. Device according to one of claims 25 to 28, characterized in that the tube section (14) extends from an outlet (18) of the road gully (6) at least up to an upper inlet of a pipeline (22) opening with its lower end into the rain sewer or drain (10).
30. Device according to claim 29, characterized in that the tube section (14) extends with its lower end (20) into the pipeline (22).
31. Device according to claim 29 or 30, characterized in that the tube section (14) extends inside the pipeline (22) up to the proximity of the point where it discharges into the rain sewer or drain (10) or the monitoring shaft (12).
32. Device according to one of claims 29 to 31, characterized in that the tube section (14) is sealed off from the pipeline (22).
33. Device according to one of claims 25 to 32, characterized by a branch piece (48) positioned at the outlet (18) of the road gully (6).
34. Device according to one of claims 25 to 33, characterized by a branch piece (48) positioned at the inlet (24) of the rain sewer or drain (10) or of the monitoring shaft (12).
35. Device according to claim 33 or 34, characterized in that the branch piece (48) projects outwards over the road gully (6) and/or the rain sewer or drain (10) or the monitoring shaft (12).
36. Device according to one of claims 33 to 35, characterized in that the tube section (14) is connected in non-displaceable manner to the branch piece (48).
37. Device according to one of claims 33 to 36, characterized in that the tube section (14) is pushed over the branch piece (48).
38. Device according to one of claims 33 to 37, characterized in that the tube section (14) is secured to the branch piece (48) by a tube clamp (38).
39. Device according to one of claims 25 to 38, characterized by a connection flange (44), positioned at at least one of the ends (16, 20) of the tube section (14), which is preferably secured in detachable manner to at least one flange (42) connected to the road gully (6) and/or to the rain sewer or drain (10) or to the monitoring shaft (12).
40. Device according to one of claims 25 to 38, characterized by a coupling element, positioned at at least one of the ends (16, 20) of the tube section (14), which cooperates with at least one coupling element connected to the road gully (6) and/or to the rain sewer or drain (10) or to the monitoring shaft (12).
41. Device according to one of claims 25 to 40, characterized by a collar positioned at at least one end of the tube section (14), pushed on one side over one end of the tube section (14) and on the other side over a branch piece (48) or a connection piece.
42. Device according to one of claims 25 to 41, characterized by a jacket (27) comprising gravel, sand, concrete (33) or the like, at least partially covering the tube section (14).
43. Device according to one of claims 25 to 42, characterized in that the tube section (14) is completely embedded in a material, preferably concrete (33), hardening by setting or cooling.
44. Device according to one of claims 25 to 41, characterized by a casing (30) surrounding the tube section (14) over at least one part of its length, the hardened material (30) being positioned between its inside and an external circumferential area of the tube section (14).
45. Device according to claim 44, characterized in that the casing (30) consists of a thin flexible and tear-resistant material, for example of sackcloth, a stable plastic film or the like.

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