EP1776507B1 - Method for producing an infrastructure channel - Google Patents

Abstract

The invention concerns a method for producing an infrastructure channel (1) which consists of at least two sub-pieces (2) of predetermined length, each sub-piece (2) being cast on-site from cast-in-place concrete (9) or from ready-mixed concrete to form a single piece.

Description

The invention relates to a method for producing an infrastructure channel, which consists of at least two sections of predetermined length.

An infrastructure channel is used in particular in new housing areas or in larger refurbishment projects to summarize all supply and disposal lines in a single, preferably walk-in and sealed channel. Due to its spatial design, a direct and permanent control of the supply and disposal lines is possible. Leakage of piping and emissions to cables within a conduit of the infrastructure channel reach the bottom of the structure in liquid or semi-solid form or can escape in gaseous form in the air-filled space of the conduit. Leakage of piping can be detected by installed leak detection systems without the need for excavation. Furthermore, an exchange or a new installation of supply and disposal lines within the infrastructure channel is easy to accomplish, since access openings are made via excavation openings without excavation. In addition, an inspection of both the supply and disposal lines and the interior of the infrastructure channel by means of a commercially available sewer inspection camera system.

By separating the static parts of the infrastructure channel from the supply and disposal lines in the line a relatively high level of security against the occurrence of leaks and leaks due to subsidence of the infrastructure channel is given, with a development solution with an infrastructure channel the protective function of a double-walled pipe surpasses. Also, roots can not penetrate into the supply and disposal lines via leaky part connections and crack-shaped damage.

The DE 201 13 897 U1 discloses an infrastructure channel consisting of individual one-piece finished segments which are assembled into one continuous channel. Each finished segment has a base plate to which connect two lateral walls, which are interconnected via a top-side curvature. The prefabricated segments are factory made of concrete and assembled on site using face seals. So that the finished segments can be transported without damage, at least a cost-intensive transport reinforcement is required. Furthermore, the production of a flat trench for full-surface support of the base plates of the finished segments proves to be very labor-intensive. In addition, the frontal sealing adjacent finished segments can be realized only with considerable effort. Furthermore, the factory made finished segments have the disadvantage that their length is very limited for manufacturing reasons.

Furthermore, in practice channels are known both as prefabricated constructions as well as in-situ concrete solutions, which have a reinforcement made of steel, which are disadvantageous in as cracks or efflorescence, the reinforcement is exposed and can rust, creating a total destruction of the channels, eg , B. by explosive action, goes along. Even with a fire, the concrete from the steel of the reinforcement breaks and the channel is destroyed afterwards.

• DE 38 38 239 A1
• DE 37 00159 A1
• GB 1 353 037 A
• WO 00 39 414 A

bekannt geworden.The production of channels from at least two sections of predetermined length, wherein each section is cast integrally on the construction site of in-situ concrete or ready-mixed concrete, is made of:

• DE 38 38 239 A1
• DE 37 00159 A1
• GB 1 353 037 A
• WO 00 39 414 A

known.

In addition, the reveals DE 35 24 687 A1 a method for producing a Ortbetonkanals, in which joints and associated leaks should be avoided.

Finally, the shows GB 2 360 472 A an in-situ concrete with a reinforcement of polypropylene fibers.

It is an object of the invention to provide a method of the type mentioned, which ensures a fast and cost-effective production of an infrastructure channel.

According to the invention, this object is achieved in that each section poured cast on site from in-situ concrete or ready-mixed concrete, spanned an inner formwork with a drainage fleece and closed the beginning and the end of the infrastructure channel during drying of the in-situ concrete by means of wood panels and / or a foil strip curtain becomes.

Every single section of the infrastructure channel will open the site created continuously from in-situ concrete or ready-mixed concrete in one-piece design, the term in-situ concrete is used in the present description equally well for ready-mixed concrete. The length of each section to be created is such that the section can be created in a single daily cycle, the length between 4m and 40m, preferably between 10m and 20m, preferably 15m. A steel reinforcement is not required. Due to the lack of steel reinforcement and the relatively large length of each section and the relatively low preparations a quick and cost-effective production of the infrastructure channel is guaranteed. In order to absorb the water emerging during the compaction of the in-situ concrete and to return it to the in situ curing of the in-situ concrete, the drainage fleece spanning the inner formwork is provided. The steel formwork inside formwork, one in a concreting position and a driving position hinged formwork made of steel, is covered with a plastic grid, which is fixed by plastic rivets on the inner formwork, and on the plastic grid, the multiple use drainage fleece is applied, which is the inner formwork in the Concrete construction tightly spanned. In addition, it is useful to seal the beginning of the infrastructure channel with wood panels with a door and the end of each formwork of the piece to be manufactured with a foil strip curtain to avoid unwanted draft within the infrastructure channel. The foil strip curtain can be attached to the inner formwork, for example at the end of the infrastructure channel. Furthermore, the wood panels for fixing a handling device, in particular a cable crane, for the displacement of parts, in particular insulating foils, to serve on the construction site.

Preferably, a sealing and expansion joint band is cast between two adjacent sections. The sealing and expansion joint band comprises two sealing bands, which are connected to each other by means of a middle tube, each sealing band being associated with an end face of a section. Appropriately, the sealing and expansion joint band is used with sealing parts in the respective end face, the sections. For this purpose, an end formwork is used, which is provided with slots for the sealing and expansion joint band, which is securely connected after curing of the in-situ concrete with the sections, which is why leaks are almost impossible. Furthermore, a component made of a foamed polymer, in particular polystyrene, is provided on the front side, which ensures the function of the sealing and expansion joint band.

For a post-treatment of in-situ concrete, a humidifier is preferably placed in the interior of the stripping of the section. In order to ensure the effect of the humidifier, a film wall is expediently placed inside the infrastructure channel depending on the number of existing cuts. The film wall can be made portable and be adjusted according to the construction progress, so that the treatment with the humidifier takes place in about three sections per section.

In order to allow a relatively early stripping of the section despite a relatively high proportion of fly ash in the in-situ concrete, preferably a thermally insulated Exterior formwork used.

According to a development, the sections are covered during stripping with at least one bubble wrap. The bubble wrap prevents unwanted temperature stresses in the in-situ concrete, which can lead to cracking, and causes a relatively short stripping time. By way of example, the bubble wrap sheets can be laid over the infrastructure channel by means of the cable crane in such a way that they cover three to six sections. The cable crane, which is fastened, for example with its one end to the wood panels for closing the entrance of the infrastructure channel and with its other end to the formwork, as well as the bubble wrap, pulled during stripping, whereby a Ausschaltungsfortschritt the following cover is guaranteed , In a well-known from practice coverage with so-called winter construction mats, which are only in relatively small dimensions in the trade, there is the danger of too great a temperature gradient between the core of the in-situ concrete and the ambient temperature and beyond is not possible with the Winterbauschutzmatten immediate and uninterrupted insulation ,

To determine the concrete maturity, which is dependent on the temperature and the time, preferably the temperature of the in-situ concrete is measured. The temperature measurement can be at several spaced locations of the section, preferably, seen over the cross section, in its outer and inner circumference and in the middle, and serves primarily to determine the optimum time for stripping the section and for determining the curing time of the hardening in-situ concrete , The data of the temperature measurements are delivered to a concrete maturing computer, with which the Ausschalzeit is to be determined.

In order to provide the amount of water required for the aftertreatment of the in-situ concrete is expediently under Bubble wrap installed a sprinkler hose, especially a micro-sprinkler hose for irrigation of in-situ concrete. The sprinkler hose is designed so that a washing out of the solidifying in-situ concrete is prevented, which is why it preferably has micro-openings.

In a further embodiment, a controllable heating is operated inside the inner formwork. The heater, which may include one or more gas burners, is needed especially at a low ambient temperature and may be controlled by the data of the temperature measurement by the concrete maturity computer.

In an in-situ concrete for the production of the infrastructure channel a reinforcement with plastic fibers, in particular polypropylene fibers is formed, wherein the plastic fibers are mixed with the in-situ concrete, and the in-situ concrete has a short-term stiffening and a green strength of in particular 6 N / mm ² on. This allows fast shuttering.

Furthermore, the in-situ concrete comprises a disproportionately high proportion of fly ash. Depending on the outside temperature, the proportion of fly ash may be higher than that of the cement. Such a recipe is inadmissible according to the German standard for reinforced concrete. However, since the individual parts of the infrastructure channel do not contain steel, this standard is irrelevant in the present case. The high percentage of fly ash offers both economic and ecological benefits. In particular, however, the heat development is lower than with standard formulations, thus reducing the risk of the formation of shrinkage cracks accompanied.

In an infrastructure channel, an upper vault of a section has a lid which is dimensioned such that a pipeline, in particular a high-voltage line, can be inserted into the interior. The cover must be relatively large, so that the usually rigid pipe can be introduced into the interior of the infrastructure channel. The opening for receiving the lid, which can be lifted in particular for later measures, is made by a conical recess of the inner formwork and the opening corresponding to an outer contour having a lid is accurately made in a corresponding precast formwork

Preferably, at least one of the side walls is provided with at least one console for supporting a pipeline. The console can be fastened for example by means of tension anchors. The cross-sectionally, for example, L-shaped or Z-shaped console ensures a secure support of the pipeline and allows an end-side welding of two lines to be connected to one another. In addition, the console is dimensioned to support rollers for a displacement of the pipeline. Conveniently, the console consists of fiber cement.

It goes without saying that the features mentioned above and those yet to be explained below can be used not only in the respectively specified combination but also in other combinations. The scope of the invention is defined only by the claims.

Fig.1

einen Längsschnitt durch einen nach dem erfindungsge- mäßen Verfahren hergestellten Infrastruktur-Kanal mit einem vollständigen und zwei angedeuteten Teilstü- cken,

Fig.2

einen Querschnitt durch ein Teilstück des Infrastruk- tur-Kanals nach Fig. 1,

Fig.3

eine perspektivische Darstellung des Infrastruktur- Kanals nach Fig. 1,

Fig.4

eine Vorderansicht des Infrastruktur-Kanals nach Fig. 3 und

Fig.5

eine vergrößerte Darstellung von Konsolen für den Infrastruktur-Kanal.

The invention will be explained in more detail below with reference to an embodiment with reference to the accompanying drawings. It shows:

Fig.1

3 a longitudinal section through an infrastructure channel produced according to the method according to the invention with a complete and two indicated parts,

Fig.2

a cross section through a section of the infrastructure channel after Fig. 1 .

Figure 3

a perspective view of the infrastructure channel after Fig. 1 .

Figure 4

a front view of the infrastructure channel Fig. 3 and

Figure 5

an enlarged view of consoles for the infrastructure channel.

The infrastructure channel 1 consists of a larger number of sections 2, which are sealed with their respective adjacent end faces 3 together. In the present between two faces 3 joint 4 is provided for sealing a sealing and expansion joint strip 5, which comprises a central tube 6 with both sides adjoining sealing parts 7, 8, the front side abut the respective section 2.

Each section 2 of the infrastructure channel 1 is on site continuously from in-situ concrete 9 in one-piece construction created. For this purpose, a largely flat and compacted floor space is created in an excavation pit. Each section 2 to be created is dimensioned in its length such that it can be manufactured in a single daily cycle.

To create the section 2, an inner formwork 11 is first mounted with open floor of sheets, which is provided with hinges 12, wherein the hinges 12 serve after curing of the in-situ concrete 9 for pivoting parts of the inner formwork 11 to the inside. The process of concreting takes place in coupled sub-steps, wherein first on the flat bottom surface a sole 10 with, wall approaches is poured. Before concreting side walls 16 and a vault 17 a break is inserted so that the in-situ concrete 9 of the sole 10 binds something.

A drainage fleece 15 is stretched over the inner formwork 11, which absorbs the water emerging during compression of the in-situ concrete and releases it again during the subsequent hardening of the in-situ concrete 9. After laying the drainage fleece 15, a heat-insulating outer formwork 19 is mounted for the walls 16 and the vault 17.

On the front side, an end formwork with slots for the sealing and expansion joint band 5 is used in each case. After completion of the section 2 and the setting of the in-situ concrete 9, the inner formwork 11 is folded and then pulled out in the direction of the arrow 18 from the finished section 2. The section 2 is now closed on the input side with a door having wood panels 20.

With the degradation of the outer formwork 19 are continuously drawn to Ausschalungsfortschritt bubble wrap over the section 2 by a cable crane 21, wherein a frame 22 is attached to the beginning of the infrastructure channel 1 and another frame 23 at the end and is offset according to the construction progress.

In the same way then the next section 2 of the infrastructure channel 1 is manufactured and that until the infrastructure channel 1 is completed over its entire length. The infrastructure channel 1 forms a walkable shell in the supply and disposal lines of any diameter can be laid. A dismantling or repair of the supply and disposal lines is possible at any time without excavation, as at least partially manholes are assigned to the infrastructure channel 1.

In order to create the part 2 of the infrastructure channel 1 in one piece and without loss of quality, in particular with regard to cracking, a formulation for the in-situ concrete 9 is necessary, which stiffens early, a high green strength of about 6 N / mm ² ensures and allows a slow further hardening with low heat of hydration. The in-situ concrete 9, a reinforcement 13 is mixed in the form of plastic fibers 14 to ensure a special resistance of the in-situ concrete 9, in particular prevents stress or shrinkage cracks and an early, shock, shock and abrasion resistance can be increased.

For Auflagerung a pipe 24 are arranged one above the other Consoles 25 provided on one of the side walls 26 of the infrastructure channel 1, wherein the brackets 25 are formed so as to securely hold the pipe 24 on the one hand and on the other both allow an end-side welding of the pipe 24 with another pipe 24 and a support for rollers for moving the pipeline 24 provide.

Claims (11)

1. A method for producing an infrastructure channel (1), comprising at least two parts (2) of predetermined length, each part (2) being cast in one piece on the construction site from cast-in-place concrete (9) or ready-mix concrete, characterized in that an inner formwork (11) is spanned using a drainage nonwoven material (15), and the beginning and the end of the infrastructure channel (1) are closed during the drying of the cast-in-place concrete (9) using wood plates and/or a filmstrip curtain.
2. The method according to Claim 1, characterized in that a seal and expansion joint strip (5) is embedded between two adjacent parts (2).
3. The method according to Claim 2, characterized in that the seal and expansion joint strip (5) is inserted using seal parts (7, 8) in the respective front face (3) of the parts (2).
4. The method according to one of Claims 1 to 3, characterized in that after the stripping of the part (2), an air humidifier is set up in its interior.
5. The method according to one of Claims 1 to 4, characterized in that a film wall is set up in the interior of the infrastructure channel (1) as a function of the number of the provided parts (2).
6. The method according to one of Claims 1 to 5, characterized in that a thermally-insulated outer formwork (19) is used.
7. The method according to one of Claims 1 to 6, characterized in that the parts (2) are covered using at least one air cushion film during the stripping.
8. The method according to Claim 7, characterized in that a sprinkler tube, in particular a microsprinkler tube, is installed under the air cushion film to water the cast-in-place concrete (9).
9. The method according to one of Claims 1 to 8, characterized in that the temperature of the cast-in-place concrete (9) is measured.
10. The method according to one of Claims 1 to 9, characterized in that a controllable heater is operated in the interior of the inner formwork (11).
11. The method according to one of Claims 1 to 10, characterized in that, if cast-in-place concrete (9) is used, a reinforcement (13) is formed using plastic fibers (14), in particular polypropylene fibers, and the cast-in-place concrete (9) has a disproportionately high component of fly ash and/or a short-term stiffening and a green stability of 6 N/mm² in particular.

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