DE6913721U - CONCRETE CASED PIPE DESIGNED AS PRE-COMPRESSED PIPE. - Google Patents

Description

27. MSrζ 1969 Betonkeramik GmbH, 4018 Langenfeld / Rhein, Helmhotzetraeee 4-6

Concrete-coated pipe designed as a pre-compression pipe

The innovation relates to a concrete-jacketed pipe designed as a pre-compression pipe.

Sewers that are laid in the area of railway tracks, high road embankments, busy city or factory roads should be, do not allow an open construction for technical and partly for economic reasons. Low lying Sewers are - due to high excavation, shoring and laying costs - Usually very expensive and take a lot of time. This can lead to significant business interruptions, which are usually not permitted.

For this reason a hydraulic one has been used for a long time Pre-pressing process. The Use of steel or reinforced concrete pipes. More recently there has also been a move to prefabricated stoneware pipes Use concrete sheathing and also hydraulically pre-press such pipes.

The innovation concerns a concrete-encased one designed as a pre-compression pipe Tube, which is characterized by an inner tube made of plastic, preferably polyethylene.

Polyethylene pipes are known in extruded and coiled form and are so far only used as sewage pipes in laid in open construction. Polyethylene pipes can also be pulled into other pipes at a later date.

However, polyethylene pipes are soft pipes that are not hydraulically pre-pressed like the concrete or stoneware pipes mentioned at the beginning can be. Therefore, according to the innovation, for static reasons to absorb the pre-compression forces that occur, Bending moments etc. a prefabricated concrete casing is provided. This is designed in such a way that the cutting head, pressure distribution ring and, if necessary, intermediate pressing stations are attached can be.

In addition, in a further development of the innovation, the pipe carries a steel sleeve fixed in the concrete casing at one end, which engages over a rolling ring mounted at the end of the preceding pipe.

The polyethylene pipe itself is required because it is not statically loaded is, only a small wall thickness.

The connection of the polyethylene pipes to the socket joints can be done flexibly with the help of an extruder welding.

The concrete cladding can of course be made of steel mesh be reinforced.

The ubiquitous polyethylene pipe with concrete sheathing and the specified socket connection offers the following advantages:

a) no deformation of the polyethylene pipe during pre-compression, both in cross-section and in the longitudinal direction;

b) there is always a parallel closure of the cuff mirror and this means that an extruder weld can always be performed on the pipe

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perform inner forth;

c) the socket design remains due to the external rolling ring connection the concrete coating and the internal welding of the polyethylene pipes always flexible;

d) constant concrete quality results in a high load-bearing capacity;

e) the wall thickness of the polyethylene pipe can be kept correspondingly thin, since the load is only taken over by the concrete;

f) the line section can be addressed as hydraulically smooth as there are no joints.

The drawing shows in

1 shows a longitudinal section through a concrete encased according to the invention Polyethylene pipe;

2 shows an individual representation at the junction of two pipes according to the innovation.

^w From Fig. 1 can be seen at 1, the polyethylene pipe, which carries the concrete cladding 2 in the illustrated embodiment. At one end, a steel sleeve 3 is molded into the concrete casing, while the other end has a molded O-ring 4 into which a rolling ring is inserted in a manner to be discussed in more detail later.

2 shows the concrete casing 2 ″ of two pipes to be connected to one another, which in the ^{exemplary embodiment shown here is reinforced by a steel mesh 5, 5 1.} The polyethylene pipe can be seen at 1 or 1 ^f. Pipes are connected to one another by an extruder weld at 6. 7 means any kind of diolant that is used in front of the pipes butting together.

At 3, the steel sleeve can be seen, which lies over a rolling ring 8 which is mounted in the U-ring 4. The steel sleeve 3 is anchored by an element 9 in the concrete casing 2, while the U-ring 4 is anchored ^{at 10 in the concrete casing 2 1.}

Protection claims:

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Claims (4)

Requirements: 1. Concrete-coated pipe designed as a pre-compression pipe, marked by an inner tube made of plastic, preferably polyethylene. 2. Tube according to claim 1, characterized net that the pipe has one in the concrete casing at one end fixed steel sleeve that engages over a rolling ring mounted at the end of the preceding pipe. 3. Pipe according spoke 1 and / or 2, characterized g e indicates, that the concrete coating is reinforced with steel mesh is. 4. Pipe according to one or more of the preceding claims, characterized by an inner pipe made of PVC, glass fiber reinforced polyester or the like.