AT7887U1 - CONCRETE FOUNDING ELEMENT OF A CONSTRUCTION WORK - Google Patents

Abstract

In a concrete foundation element of a structure, a cladding tube (5) is arranged in a concrete body (3, 27) of the concrete foundation element for forming the concrete foundation element as an energy absorber, and an inner tube (15) runs inside the cladding tube (5) the annular space (11) between the cladding tube (5) and the inner tube (15) and the inner space (12) of the inner tube (15) form lines for a heat transfer medium. The cladding tube (5) is formed as corrugated pipe at least over part of its longitudinal extent, preferably over a large part of its longitudinal extent.

Description

2 AT 007 887 U1

The invention relates to a concrete foundation element of a building, wherein for forming the concrete foundation element as an energy absorber, a cladding tube is arranged in a concrete body of the concrete foundation element and within the cladding tube runs an inner tube, wherein the annular space between the cladding tube and the inner tube and the interior of the inner tube 5 form lines for a heat transfer medium.

The term " energy absorber " is used for facilities for receiving and / or emitting thermal energy. These include, for example, energy piles, etc. Such energy absorbers are also referred to as geothermal probes. 10

Energy absorbers (geothermal probes) are known, which use rigid tubes to form a heat exchanger, which are inserted into a borehole in the ground and potted with a pouring mass for producing a thermally conductive contact with the soil. It is known to use pairs of tubes which have at their lower end a connecting bow or a connecting piece. One pipe forms the supply line, the other pipe the return line. It is also possible to use a plurality of pipe pairs in a borehole which have one or more fittings as a connecting element at their lower end. In addition, in the case of such energy absorbers, dimensionally stable tubes already arranged coaxially in one another have been used. The outer tube is in this case closed at its lower end and the annular space between the outer tube and the inner tube forms the supply line, while the interior of the inner tube forms the return line for the heat transfer medium. An energy absorber of this type is known for example from 25 DE 29 28 414 A1. In such Energieabsorbem pipes with the required lengths can neither be transported nor stored and must therefore be assembled on site from individual pieces. The disadvantage here, in addition to the high assembly costs and the assembly time required therewith, inter alia, the difficult as part of a construction site quality assurance. 30

In another type of energy absorber, concrete foundation elements of structures are designed as energy absorbers. These may be prefabricated foundation elements which are hammered directly into the ground without a borehole being formed beforehand. The concrete foundation elements have a concrete body with a 35 inner cavity into which pipes are introduced as supply and discharge for the heat transfer medium. It is also already known a training in which the annular space between the wall of the foundation element and an inner tube as a feed line and the interior of the inner tube serves as a return line. A foundation element of the type mentioned above designed as an energy absorber is known, for example, from one of the exemplary embodiments described in EP 582 118 A1. In the cavity of a particular formed in the form of a concrete pile foundation element, a conduit system made of dimensionally stable tubes is introduced and the space between the conduit system and the wall of the cavity of the foundation element 45 is filled with a filling material. In one embodiment, the conduit system has an outer cladding tube and an inner tube disposed within the cladding tube.

The object of the invention is to provide an improved energy absorber of the type mentioned, which has a high heat transfer. According to the invention, this is achieved by such an energy absorber having the features of claim 1.

The corrugation of the at least one cladding tube according to the invention increases the dimensional stability of the tube wall. This makes it possible to keep the wall thickness comparatively low. In addition, the surface is increased by the corrugation of the cladding tube. The lower wall thickness and the larger surface area both result in improved values for the heat transmission and heat transfer.

Furthermore, as the heat transfer medium flows through the annular space between the cladding tube and the inner tube, due to the corrugation of the cladding tube, local micro turbulences can advantageously form on the inner surface of the corrugated tube. These microturbulences additionally promote the heat transfer from the inner surface of the corrugated tube into the heat transfer medium.

Advantageously, can be formed by the corrugated formation of the cladding tube according to the invention this io with sufficient flexibility, so that it together with the also having sufficient flexibility inner tube is rollable. On the whole, this makes it possible for the line system, on the one hand, to be rolled up for storage on the other hand for its transport to the construction site to form a roll or a winding (that is to say several turns are formed). It will allow the storage and transport of the finished 15 pipe system. The assembly work and assembly time at the construction site can be significantly reduced and the completion and testing of the pipe system can be done in a specialized workshop in mass production, whereby the quality assurance is significantly improved 20 Preferably, the cladding is apart from one or more sections whose lengths less than 2m, formed over its entire length as a corrugated pipe.

A concrete foundation element according to the invention may comprise a prefabricated concrete body having at least one upwardly open cavity into which the conduit system comprising the cladding tube and the inner tube is introduced, whereupon the space between the conduit system and the wall of the cavity is provided with a volume-resistant and highly thermally conductive spout is filled. The insertion of the conduit system into the concrete body can take place here after the concrete body has been driven into the ground to prevent damage to the piping system by the Rammbeanspruchung. In particular, if it is not a concrete foundation element to be buried in the ground but a staggered concrete foundation element, the pipe system can already have been inserted into the concrete body before the concrete foundation element has been introduced into the ground. A concrete foundation element according to the invention can also be designed in such a way that the concrete body of the concrete foundation element is formed by in-situ concrete into which the at least one cladding tube is cast. In this case, the at least one cladding tube can be fastened to reinforcing parts of the concrete body. 40 The terms " corrugated pipe ", " corrugation " and " wavy " are used in the present application in a broad sense, such that all longitudinally repeating diameter changes of the cladding tube in which the period length is small compared to the length of the corrugated portion of the cladding tube shall fall. In addition to sinusoidal or other arcuate corrugations thus also trapezoidal, triangular or rectangular 45 corrugations are included, for example.

The terms " top " and " bottom " are related to the installation position of the energy absorber.

Further advantages and details of the invention will be explained below with reference to the accompanying drawings. In this show:

1 shows a schematic longitudinal section of a concrete foundation element according to the invention;

Figure 2 is a cross-section through the concrete foundation element taken along the line A-A of Figure 55; 4 AT 007 887 U1

3 shows a longitudinal section through an upper section of a line system of a concrete foundation element according to the invention according to a further embodiment; FIG. 4 shows a view from above (viewing direction C in FIG. 3); FIG.

Fig. 5 is a section along the line B-B of Fig. 3; 5 shows a longitudinal section through a lower end section of a pipeline system of a concrete foundation element according to a further embodiment of the invention; Figures 7 to 10 different ways for the corrugation of the cladding tube.

Fig. 11 is a schematic representation of another embodiment of the invention. 10 The figures have different scales.

A first embodiment of a concrete foundation element according to the invention, which is designed here in the form of a foundation pile, is shown in FIGS. 1 and 2. The concrete foundation element has a concrete body 3 with an upwardly open, at-15 example cylindrical cavity 2. In this a line system 1 is arranged. The conduit system 1 comprises a cladding tube 5, which is closed at its lower end by a closure part 8. Within the cladding tube 5, an inner tube 15 extends into the vicinity of the lower end of the cladding tube, wherein the inner tube preferably terminates at a distance of less than 1m from the lower end of the cladding tube. Between the inner tube 15 and 20 the cladding tube 5 is an annular space 11, which serves as the interior 12 of the inner tube 15 as a conduit for the conduit system 1 by flowing heat transfer medium. The inner tube 15 is coaxial with the cladding tube 5, with the exception of its uppermost portion. Spacers 13 serve to define the position of the inner tube 15 in the cladding tube 25. An uppermost portion of the cladding tube 5 is formed by a connecting piece 6, which in the exemplary embodiment shown is a graduation of its diameter , wherein a widened upper part results in order to provide sufficient space for the connecting pipes 9, 10. A lid or closure part 7 closes off the connection piece at its upper end. Through a first opening in the closure part 7, the connection pipe 9 serving for the supply of the heat transfer medium 30, which opens into the annular space 11, enters. A second opening in the closure part 7 is penetrated by the connection pipe 10, the interior of which continues the interior 12 of the inner pipe 15 and which serves for the return of the heat transfer medium. In the exemplary embodiment shown, the connecting pipe 10 is formed by an end section of the pipe forming the inner pipe 15 extending from the closure part 7. It is therefore provided for the inner tube 35 and the connecting pipe 10, a continuous tube whose lying within the cladding tube 5 part of the inner tube 15 and its outside and above the cladding tube 5 lying part of the connecting tube 10 forms. This continuous tube can be assembled in the manufacture of several individual pieces, which are connected for example by means of a weld. 40

The space between the conduit system 1, the outer wall 22 is formed by the outer surface of the cladding tube 5, and the wall of the cavity 2 is filled with a pouring mass 4. The pouring mass should be volume-resistant and good heat-conducting. For example, bentonite could be used as pouring compound 4, optionally with additives which can be formed, for example, by cement and / or quartz sand, etc. Also, a concrete-sand mixture with aggregates to bring about the volume resistance and increase the thermal conductivity is replaceable for this purpose. It would be conceivable and possible to use 4 sand alone as a pouring mass. The term " spout-50 se " is used in the context of this document not only for pourable masses (although these are preferred), also other in the space between the conduit system and the wall of the cavity einbringbare substances are to be encompassed, in particular free-flowing.

The cladding tube 5 is formed over the major part of its longitudinal extent as a corrugated tube (corrugated tube) -55. Namely, it can be seen from FIG. 1 that the cladding tube 5 is formed by a corrugated tube over its entire length, with the exception of the portion forming the final part 6.

In an advantageous embodiment of the invention, the cladding tube, at least in its s corrugated area of plastic, such as polyethylene or polypropylene. The wall thickness of the cladding tube 5 in its corrugated area is in this case preferably at most 5 mm, wherein for corrugated tubes with diameters of at most 100 mm, a value of at most 3 mm is particularly preferred. It is achieved a zusammenrollbare training of the cladding tube 5 and subsequently the entire line system 1. 10

The connector 6 may also be made of plastic and connected to the corrugated part of the cladding tube 5 by welding. The closure parts 7 and 8 can also be made of plastic, and the closure part 8 can be welded to the lower end of the cladding tube 5 and the closure part 7 to the connection piece 6 of the cladding tube 5. 15

In particular, in the case of the formation of the cladding tube 5 made of plastic, a formation of the inner tube 15 made of plastic is preferred. In this case, the same plastic as for the cladding tube 5 can be used. Since act on the inner tube only much smaller loads than on the cladding tube and the diameter of the inner tube is smaller, this can be made correspondingly flexible without 20 corrugation, so that it is zusammenrollbar.

In the upper portion of the inner tube 15, this is preferably provided with a thermal insulation 14 in order to reduce heat losses of the heat transfer medium flowing out inside the inner tube 15. 25

The piping system 1 can be completed in a specialist shop and delivered to the construction site in a state rolled up into a coil or roll. At the construction site then the introduction of the conduit system 1 takes place in the cavity 2 of the concrete body 3, preferably after this has already been introduced into the soil. After the introduction of the conduit system 1 into the cavity 2 of the concrete body 3, the pouring mass 4 is introduced. As a result, the connecting pipes 9,10 can be routed to the junction and connected.

It would also be conceivable and possible to prefabricate the concrete foundation element with the pipe system 1 contained therein and deliver it to the construction site in the finished state. This especially if no special mechanical stresses occur during installation on site.

Through the connecting pipe 9, the management system 1 of the concrete foundation element 40 heat transfer medium supplied and this removed after heating for heating purposes or the cooling for cooling purposes the connection pipe 10 again.

When used for heating purposes, the heating system, which includes the concrete foundation element as an energy absorber, further comprises a heat pump. Due to the very good heat transfer of an energy absorber according to the invention, a small average temperature difference between the surrounding soil and the pipe system 1 can be achieved. The heat transfer medium can thereby obtain higher temperatures compared to conventional energy absorbers, so that it still has a temperature of well above 0 ° C even after passing through the heat pump, for example, has a temperature in the range between 2 ° C and 6 ° C. It can thereby as a heat transfer medium additive-free water, d. H. pure tap water can be used without any risk of frost. The use of cryoprotectants, as is conventionally required, can thereby be unnecessary. In the cooling mode, the heat transfer medium can either be used for indirect room cooling after it has been removed from the duct 1 by supplying it to a cooling unit. Since a comparatively low temperature of the heat transfer medium is achieved after passing through the energy absorber, a direct cooling, for example via conventional ceiling, wall or floor heating is possible. 5

The outer diameter d of the cladding tube 5 may be, for example, in the range between 5 and 20cm. The diameter D of the cavity is adapted to the diameter d of the cladding tube 5 and may for example be in the range between 7cm and 35cm, z. B. at an outer diameter of the cladding tube 5 of 8cm have a value in the range of 13cm, to conceivable and possible it is also to arrange a plurality of piping systems 1 in a cavity 2 of the concrete body 3 or provide in the concrete body 3 a plurality of cavities 2, in each of which or multiple line systems 1 are arranged.

3 to 5 show a further embodiment for einzubrin in the concrete body 3 ing system 1. There is also an expansion device to compensate for changes in volume of the heat transfer medium present (in the embodiment of FIGS. 1 and 2, such is outside provided the concrete foundation element). For this purpose, two metal sleeves 16 are inserted into the annular space 11, which are closed at its upper end by a wall 17 and at its lower end an opening 18 20 have. A spacer 19 provides a distance to the upper closure part 7. When filling a heat transfer medium in the metal sleeves 16 initially existing air can not escape from the metal sleeves 16 and forms a compressible air cushion. The metal training ensures long-term airtightness. In one embodiment of the conduit system 1 made of metal, the function of the expansion device can be achieved 25 that the connecting pipe 9 protrudes a little way into the connector 6 and so the air cushion is formed in the connector 6.

The section along the line D-D of Fig. 3 corresponds to the section shown in Fig. 2 along the line A-A of Fig. 1. 30

Fig. 6 shows a variant in which the inner tube 15 extends to the lower end of the cladding tube 5. The inner tube 15 has for this purpose in its lower end region openings 21 for the passage of the heat transfer medium. The threaded hole 20 shown in FIGS. 1 and 6 on the underside of the closure part 8 serves to screw in an additional weight in order to assist the introduction of the conduit system 1 into the cavity 2 when the dead weight of the conduit system 1 and of the heat transfer medium filled therein Purpose is insufficient. Other types of attachment of additional weights are conceivable and possible, such as e.g. outboard 40 holes in the closure part 8 for attaching bolts or hooks, as well as annular holders, which are attached to the bottom of the corrugated pipe.

In order to center the energy absorber in the cavity 2 as possible or to avoid damage during insertion, the cladding tube 5 is preferably provided on the outside with spacers, not shown in the Fig. 45, which also have the function of guiding and sliding elements.

With the conduit system 1, a hose is preferably introduced into the cavity 2 with, which can be attached to the outside of the conduit system 1 and extends to the lower end of the so-line system 1. Through this, the filler or the pouring mass 4 can be filled. It would also be conceivable and possible, for this purpose, to provide a further tube running inside the cladding tube 5, which passes through openings in the upper closure part 7 and in the lower closure part 8 and opens out on the underside of the lower closure part 8. 55 7 AT 007 887 U1

FIGS. 7 to 10 show examples of different ways of forming the corrugation of the cladding tube 5. In addition to the sinusoidal corrugation resulting from FIGS. 1 to 6, inter alia such corrugations are conceivable and possible, as shown in FIGS. 7 to 10. Thus, FIG. 7 shows a trapezoidal, FIG. 8 a rectangular and FIG. 9 a triangular or 5 serrated curl. The corrugation of Fig. 10 is formed by successive semicircular sections connected by straight sections.

The height h of the corrugation (between Wellenberg and Wellental) is advantageously at least 2 mm. A value in the range between 3 mm and 5 mm is particularly preferred. 10

An embodiment of the cladding tube 5 made of metal, such as stainless steel, is conceivable and possible. In order to form the corrugated casing tube and subsequently the entire line system rollable, in this case, a wall thickness of the cladding tube of at most 3 mm is preferred, for corrugated tubes with a diameter of at most 100 mm, a wall thickness-15 ke of at most 2mm is preferred. Also, the inner tube 15 may be made of metal in this case. A design of the cladding tube 5 and given if the inner tube 15 made of metal is particularly preferred when using a heat transfer medium, which changes its state of aggregation in the system cycle between liquid and gaseous. Such a heat transfer medium can for example be formed by under a corresponding pressure (for example, in the range of 40 bar) standing carbon dioxide or hydrocarbon. Even higher working temperatures are possible with a metal training.

It would also be conceivable and possible to form the inner tube 15 at least over a majority of its longitudinal extent as a corrugated tube, for example in the region of its longitudinal extension, in which it extends within the section of the cladding tube 5 formed as a corrugated tube.

The concrete body 3 could be formed by in-situ concrete instead of training in the form of a prefabricated part, which is transported to the construction site in the finished state. Such an embodiment of the invention is shown schematically in FIG. 11. To produce the concrete foundation element, a recess 24 having a corresponding shape and depth is first formed in the soil 23. In this Armierungsteile 25 are introduced, in particular a corresponding reinforcing basket. Furthermore, at least one conduit system 1 is introduced into the recess 24, which is formed in the manner described above and has a cladding tube 5 and an inner tube 15 extending within the cladding tube 5, the outer wall 22 of the conduit system being formed by the outer lateral surface of the cladding tube 5 becomes. Preferably, the conduit system 1, for example with plastic quick-ties or with a binding wire 26, attached to the reinforcing cage. As a result, the recess 24 is poured with concrete, whereby the concrete body 27 is gebil-40 det. The at least one line system 1 is thus poured into the concrete body 27. Several conduit systems 1 could be poured into the concrete body 27 in this way.

A building 28 based on concrete foundation element is indicated only schematically in FIG. 11.

For example, the concrete foundation element according to the invention, which in this way has been produced from cast-in-situ concrete, may be a diaphragm wall or a bored pile. Other trained in accordance with the invention concrete foundation elements of buildings can thus also consist of in-situ concrete.

Optionally in the recess 24 to be used formworks are not shown in Fig. 11 and may be formed in a conventional manner. 55 Different modifications of the illustrated embodiments of the invention are

Claims (17)

8 AT 007 887 U1 bar and possible, without departing from the scope of the invention. Legend to the remark: 5 1 Piping system 2 Cavity 3 Concrete body 4 Pouring mass io 5 Cladding 6 Connector 7 Locking part 8 Locking part 9 Connecting pipe 15 10 Connecting pipe 11 Annular space 12 Interior 13 Spacer 14 Heat insulation 20 15 Inner pipe 16 Metal sleeve 17 Wall 18 Opening 19 Spacer 2s 20 Threaded hole 21 opening 22 outer wall 23 soil 24 recess 30 25 reinforcing member 25 binding wire 27 concrete body 28 Bauwerk claims: 1. concrete foundation element of a building, wherein for forming the concrete foundation element as an energy absorber a cladding tube (5) in a concrete body (3, 27) of the Be arranged 40 ton foundations element and within the cladding tube (5) an inner tube (15), wherein the annular space (11) between the cladding tube (5) and the inner tube (15) and the interior (12) of the inner tube (15 ) Form lines for a heat transfer medium, characterized in that the cladding tube (5) at least üb it forms part of its longitudinal extent, preferably over a large part of its longitudinal extent, as a corrugated tube and consists of plastic at least in its corrugated area. 2. concrete foundation element according to claim 1, characterized in that the cladding tube (5) arranged therein with the inner tube (15) for storage and transport before its introduction into the concrete body (3, 27) of the concrete foundation element to a role - 50 is sammenrollbar. 3. concrete foundation element according to claim 1 or claim 2, characterized in that the cladding tube (5) over its entire length consists of plastic. 4. concrete foundation element according to claim 3, characterized in that the wall thickness 9 007 887 U1 thickness of the cladding tube (5) in its corrugated region is at most 5 mm and in the case of formation of the corrugated region with an outer diameter of at most 100 mm preferably at most 3 mm. 5. concrete foundation element according to one of claims 3 or 4, characterized in that the inner tube (15) consists of plastic. 6. concrete foundation element according to one of claims 1 to 5, characterized in that the corrugations of the cladding tube sinusoidal, trapezoidal, rectangular, triangular io or in the form of successive semicircles or in the form of a combination here are formed by. • · '' <4 7. concrete foundation element according to one of claims 1 to 6, characterized in that the height (h) of the corrugations is at least 2 mm, with a value in the range 15 between 3 mm and 5 mm is particularly preferred. 8. concrete foundation element according to one of claims 1 to 7, characterized in that the inner tube (15) is provided at least over an upper portion of its longitudinal extent with a thermal insulation (14). 20 9. concrete foundation element according to one of claims 1 to 8, characterized in that the inner tube (15) at a distance of less than 1m from the lower end of the cladding tube (5) ends. 10. concrete foundation element according to one of claims 1 to 9, characterized in that in the annular space (11) an expansion device for compensating for changes in volume of the heat transfer medium is arranged. 11. Concrete foundation element according to claim 10, characterized in that the expansion device has at least one downwardly open and upwardly closed metal sleeve (16). 12. concrete foundation element according to one of claims 1 to 11, characterized in that a connecting pipe (9) through an upper closure part (7) of the cladding tube (5) in the annular space (11) is guided. 13. concrete foundation element according to one of claims 1 to 12, characterized in that a connection pipe (10) through an upper closure part (7) of the cladding tube (5) is guided, wherein the interior of the connection pipe (10) from the interior (12) the inner tube (15) 40 is continued. 14. Concrete foundation element according to claim 13, characterized in that the connection pipe (10) is formed by a from the upper closure part (7) of the cladding tube (5) projecting end portion of the inner tube (15) forming tube. 45 15. Concrete foundation element according to one of claims 1 to 14, characterized in that the outer diameter (d) of the cladding tube in the corrugated part of the cladding tube (5) in the range between 5 cm and 20 cm. 16 concrete foundation element according to one of claims 1 to 15, characterized in that the cladding tube (5) apart from one or more sections whose lengths are less than 2m, is formed over its entire length as a corrugated pipe. 17. Concrete foundation element according to one of claims 1 to 16, characterized in that the cladding tube (5) is closed at its lower end. 10 15 20 10 AT 007 887 U1 18. concrete foundation element according to one of claims 1 to 17, characterized in that the concrete foundation element is a foundation pile. 19. concrete foundation element according to one of claims 1 to 18, characterized in that the concrete foundation element has a prefabricated concrete body (3) with at least one cavity (2), in which the at least one cladding tube (5) is arranged. 20. concrete foundation element according to claim 19, characterized in that the cavity (2) of the concrete body (3) is open at the top. 21 concrete foundation element according to claim 19 or claim 20, characterized in that between the concrete body (3) and the at least one cladding tube (5) has a spout (4) is introduced. 22 concrete foundation element according to one of claims 19 to 21, characterized in that the concrete body (3) reinforcing parts made of steel. 23. concrete foundation element according to one of claims 1 to 18, characterized in that a concrete body (27) of the concrete foundation element is formed by in-situ concrete and in this concrete body (27), the at least one cladding tube (5) is cast. 24. concrete foundation element according to claim 23, characterized in that the at least one cladding tube (5) is fixed to reinforcing parts (25) of the concrete body (27). 25Here 4 sheets of drawings 30 35 40 45 50 55