EP0248813A1

EP0248813A1 - Re-usable casing system for the creation of free spaces in building materials.

Info

Publication number: EP0248813A1
Application number: EP86902361A
Authority: EP
Inventors: Andreas Holterhus; Paul Couwenbergs
Original assignee: BBT BETON- BAUTECHNIK GmbH; BBT BETON BAUTECHNIK GmbH
Current assignee: BBT BETON- BAUTECHNIK GmbH; BBT BETON BAUTECHNIK GmbH
Priority date: 1985-03-09
Filing date: 1986-03-07
Publication date: 1987-12-16
Also published as: DK532386A; NO864466L; WO1986005229A1; NO864466D0; DK532386D0; EP0248813B1; FI873870A0; ES552807A0; FI873870A; DE3663831D1; AU5664086A; ATE43878T1; ES8800391A1; AU590266B2

Abstract

The casing system contains at least one filling element filled with liquid that can be laid inside a reinforcement of a building material, such as concrete, in the form of a hose (2). After hardening, the hose (2) can be withdrawn from the hardened concrete and used again. During hardening it can be connected with a vibrating device (30). Additional filling elements (50) can be placed on the hose and removed once the building material has been hardened. In this way there are created branched or unbranched free spaces which can be used to receive power lines, water and gas conduits but also as air ventilation or evacuation ducts or as air conditioning ducts. In addition, they may be used as required as irrigation or water drainage channels.

Description

Reusable formwork system for creating free spaces in building materials

TECHNICAL AREA

The invention relates to a reusable formwork system for the production of open spaces in a building material, comprising at least one filling body filled with a medium and closed at one end, which penetrates the building material and determines the free space to be formed, the filling body according to Solidification of the building material while the respective free space remains can be removed from the solidified building material for reuse.

BASIC PRIOR ART

In the manufacture of building structures, namely parts of a building or individual structural elements, there is a need to free spaces or cavities, e.g., into the building materials before they are solidified or hardened. to incorporate for cable laying. For this purpose, it is known, for example, to lay plastic pipes in a building material such as concrete before it hardens. This has the disadvantage that such plastic tubes are permanently connected to the structure; the plastic tubes are lost and are not accessible for reuse.

From German Offenlegungsschri ft No. 32 40 166 it is known to use an inflatable tube Creation of such open spaces or voids to use. The hose is closed at one end and can be connected at the other end to a pressure medium source, for example a compressed air generator. The hose is laid and inflated to a predetermined internal pressure before the building material is applied. After the building material has been applied and solidified, and the internal pressure has been released, the hose can be removed from the building material and thus used again and again.

DISCLOSURE OF THE INVENTION

The invention has for its object to provide a reusable formwork system of the type mentioned for the production of open spaces in building materials, which can be used to produce differently designed open spaces and can be used universally, i.e. can be used on a construction site as well as in the prefabrication of components.

The invention is based on the further object to provide a reusable formwork system of the type mentioned for the production of free spaces in building materials, by which the solidification of the building material is promoted and which provides free spaces with a particular smooth surface without impairing its reusability his.

According to the invention, this object is achieved in that the filling body is formed from at least one liquid-filled hose, the open end of which is connected to a filling and emptying tube. The use of liquid-filled hoses has the advantage that the incompressible liquid effectively prevents even locally restricted compression of the hose during the solidification of the building material. Due to the close contact of the solidifying building material on the liquid-filled hose or the liquid-filled hoses, a particularly uniform and smooth surface of the respectively formed free space or cavity is obtained. At the same time, however, the liquid filling enables vibrations to be generated to solidify the building material by exciting vibrations of the liquid-filled hose.

The vibrations are advantageously generated by a reciprocating piston which acts directly on the liquid contained in a liquid-filled hose or in a feed line to which a multiplicity of hoses is connected in parallel.

In order to achieve a better adaptation of the hoses to the given shapes of the free spaces such as arches and the like and to reliably eliminate the risk of kinks or constrictions, it is expedient to insert a helical compression spring into the hose. This helical compression spring has the further important advantage that when a negative pressure is applied to empty the hose, it does not collapse but is supported by the helical compression spring. This reduces the contact areas between the solidified building material and the hose quite considerably, so that the removal of the hose from the free space or cavity formed is made very easy.

Advantageously, the hose is provided at locations at which the free space or cavity is to be connected to the outer surface of the building material with a further filler body, which at one end can be detachably connected to the

10 liquid-filled hose is connected and after solidification of the building material and removal of the liquid-filled hose can be removed and reused. In this way, a further free space or cavity is obtained

15 branches off from the cavity formed by the liquid-filled hose and opens into the outer surface or surface of the building material.

The hoses can be laid in the building material

20 with reinforced building materials such as concrete can be facilitated by providing the reinforced building material with spacers or guide elements for the hose. This ensures that the hose is the desired one

25 takes up position and this position in the liquid-filled state and during the fastening of the building material does not change.

30 BRIEF DESCRIPTION OF THE DRAWINGS

Exemplary embodiments of the invention are shown in the figures and are explained and described in detail below using the reference numerals. It shows ^" - -_ 1 shows a schematic, perspective overall representation of an exemplary embodiment of the reusable formwork system according to the invention for the production of open spaces in connection with a reinforcement for concrete construction;

FIG. 1 a shows another arrangement of the guide elements for the liquid-filled hoses in the reusable formwork system according to FIG. 1;

2 shows a schematic illustration of a vibrating device in the reusable formwork system according to FIG. 1;

3 shows a modified version of a hose in the liquid-filled state in the reusable formwork system according to FIG.

4 shows the hose according to FIG. 3 in the empty state when connected to a vacuum source;

5 and 6 are a side view and a plan view of a further filler body for use in the reusable formwork system according to FIG. 1; and

Fig. 7 is a plan view of a modified embodiment of the further packing according to Fi g .6. PREFERRED EMBODIMENTS OF THE INVENTION

The reusable formwork system for the production of open spaces or cavities can be used in a wide variety of ways and in connection with a wide variety of building materials. The exemplary embodiment of the reusable formwork system shown schematically in overall perspective in FIG. 1 is shown in connection with a reinforcement 10 for concrete as a building material. Such a reusable formwork system is e.g. used in the production of a concrete ceiling which is to be provided with a series of free spaces or cavities running essentially parallel to one another through the concrete ceiling.

The core of the reusable formwork system according to Fig.l is a packing 1, which consists of a series of substantially parallel hoses 2, one end each of which is hurriedly closed by a vent valve 3 according to Fig. And the open ends of a common Lead 4 are connected. The common supply line 4 is connected via a branch 5 to a filling and eπtl eerventi 1 6 of a conventional type and to a vibrating device 30 described below in connection with FIG. The common supply line 4 is further provided with a safety or overpressure relief valve 7, which automatically relieves the packing 1 from an impermissibly increased internal pressure.

The filler 1 or the hoses 2 are inserted into a casing 8 of the usual type for concrete, and this casing 8 is therefore not in detail. shown. The filler 1 or the tubes 2 are made of rubber or plastic or another material compatible with concrete, which has a compressive strength that is sufficient for the internal pressures that occur, but is flexible in order to be able to follow deformations. In special cases, the filler body can also be conventionally covered with a perforated film which adheres to the solidified or hardened building material when the filler body 1 is removed.

In the illustrated embodiment, the reinforcement 10 is provided for a concrete ceiling. This reinforcement 10 consists of a first, namely lower structural steel mat 11 and a second, namely upper structural steel mat 12, which are arranged at a distance from each other essentially parallel and are kept apart by spacers or guide elements 13. The Ab¬ spacers thereby forming guide elements 13 for the tubes 2, either ele through the guide _<enteric 13 through or extend between adjacent guide elements 13, wherein the Führungs¬ elements 13 different rows 14 form of one behind the other are arranged guide elements. 13 The spacers or guide elements 13 ensure that the hoses 2 run in the desired manner and practically do not change their arrangement during the hardening or hardening of the concrete.

The spacers or guide elements 13 are made of resilient material, in particular reinforcing steel, in such a way that they can be installed in a particularly simple manner. In the embodiment shown there is each Guide element 13 consisting of two angle elements 15 and an angle element arranged or centered therebetween _. t, which is designed as a locking element 16. Depending on the conditions and requirements of the respective application, a different number ratio between the angle elements 15 and the locking elements 16 can also be selected.

The Wi nkel el emente 15 and the locking element 16 include substantially the same angle, which is adapted to the particular application or the respective distances in the steel mat 11. In particular, the latching element 16 is designed such that it snaps onto two adjacent elements 11a and 11b of the structural steel mat 11. The angle elements 15 and the locking element 16 are connected at their tips by a strut in the form of a steel rod 17 and near their free ends by struts in the form of steel rods 18.

The free ends of the angle elements 15 are each provided with a protective device which, in the exemplary embodiment shown, consists of plastic parts 15a. The free ends of the angle elements 15 stand on the casing 8 together with the plastic parts 15a. The plastic parts 15a not only prevent the free ends of the angle elements 15 from penetrating into the casing 8, which usually consists of wood, but also prevent the corrosion of the angle elements 15 at the projecting free ends.

The latching element 16 is provided at its free ends with a latching part 16a, which latching connection between the spacer or the guide element 13 and the first structural steel mat 11. In the illustrated embodiment, the locking parts 16a are formed from hook-shaped bent free ends of the locking part 16. In another embodiment, the locking parts 16a can also be formed by angled locking parts of the locking element 16. The free ends are angled in such a way that after they have snapped onto the adjacent elements 11a and 11b of the first structural steel mat 11, they do not run parallel to this structural steel mat 11, but at an angle directed to this structural steel mat 11.

For assembly, the Absta be ^'ndshal ter or Füh¬ guide elements 13 compressed, so that the free ends of the locking elements 16 with the latching portions 16a between the adjacent elements 11a and 11b of the first wire-mesh mat are passed 11; the plastic parts 1 e 15a of the angle elements 15 then stand on the casing 8. When released, the latching parts 16a of the latching element 16 engage under the adjacent elements 11a and 11b of the first structural steel mat 11. By bending the free ends of the latching element 16 to the latching parts 16a, these latching parts 16a are located on a level above the casing 8 , so that the first structural steel mat 11 is lifted off the casing 8 after the spacers or guide elements 13 have been attached. The design of the locking parts 16a ensures that the spacers or guide elements 13 remain securely connected to the first structural steel mat 11 when the reinforcement 10 is loaded on the side of the second structural steel mat 12, because the spreading of the locking elements 16 that occurs does not lead to a separation of the locking parts 16a from the associated elements 11a and 11b of the first

Structural steel mat 11.

When installed, the spacers or

Each of the adjacent elements 11a and 11b of the structural steel mat 11 is located between the associated latching part 16a of the latching element 16 and the associated steel rod 18, which connects the angle elements 15 and the latching element 16 near their free ends.

For additional reinforcement, the spacers or guide elements 13 can have further steel rods 19 which connect the adjacent angular elements 15 of each spacer element 13 to one another either laterally or diagonally in the region between the tip and the free ends. The second structural steel mat 12 can be connected in a conventional manner to the tips of the spacers or guide elements 13.

FIG. 1 shows another arrangement of the spacers or guide elements 13, in which adjacent latching elements 16 are connected to one another via their hook-shaped bent-over latching parts 16a and to common reinforcing bars 20 of a reinforcement which, for example, runs vertically in a column or the like.

The vibrating device 30 and its connection to the open end 31 of a single hose in the manner of the hose 2 are shown schematically in FIG shown. In a corresponding manner, see FIG. 1, the vibrating device can also be connected to the branch 5 of the common feed line 4 to the hoses 2. The open end 31 is sealingly connected to a cylinder 32 in which a piston 33 is sealingly guided to and fro. The piston 33 is connected to a drive motor 35 via a transmission 34. The drive motor 35 can be, for example, an electric motor or an internal combustion engine and its speed can preferably be varied continuously. The translation 34 contains an eccentric E, via which the stroke of the piston 33 is preferably infinitely adjustable.

By means of the drive motor 35, the piston 33 is moved back and forth in the cylinder 32 at a frequency which is given by the speed set in each case on the drive motor 35, while the stroke of the piston 33 is set on the eccentric E. When the supply line 4 and the hoses 2 connected in parallel with it are filled with a liquid, for example water, vibrations are thus caused by the movement of the piston 33 in the cylinder 32, which are vibrations in the concrete surrounding the hoses 2 impact and promote its solidification or hardening. Due to the stepless adjustment of the piston stroke and the speed of the drive motor 35, the vibrations can be easily adapted to the most favorable working conditions. Appropriate setting prevents the occurrence of resonance or natural vibrations. A combined pressure-frequency display device F shows the pressures and frequencies that occur during the vibrations. The reusable formwork system described above works as follows:

After the reinforcement 10 has been laid, the hoses 2 connected to the common feed line 4 are laid within the individual spacers or guide elements 13 or between the adjacent spacers or guide elements 13. The branch 5 is connected with its open end to the cylinder 32 of the vibrating device 30 in a sealing manner. Then the entire system is filled with a liquid, e.g. Filled with water, the venting valves 3 ensuring that the system is completely vented prior to start-up. After the concrete has been applied, the vibrating device 30 is actuated, the vibrating device 30 being brought up to the preset stroke frequency of the piston 33 so quickly that the area or areas of critical natural vibrations are passed through quickly and without harmful side effects .

After the specified vibrating time, which is determined, for example, by the type of concrete and the type and laying of the reinforcement 10, the vibrating device 30 is switched off and the system is emptied via the filling and emptying valve 6 after the venting valves 3 have been opened. The hoses 2 can then be easily removed from the hardened or hardened concrete and are then available for reuse. It has been found that the tubes 2 can be pulled out of the free spaces or cavities formed at any time without difficulty; in particular, the walls are formed Clearances or cavities are evenly or smoothly formed, so that such clearances or cavities are suitable as through pipes not only for, for example, electrical or other supply lines, but also with the addition of appropriate additives which make the concrete watertight, also directly as water channels. Such free spaces or cavities can be formed in the same way in concrete ceilings as in concrete walls.

The above exemplary embodiment of the reusable formwork system has been described in connection with the production of a concrete ceiling with free spaces or cavities. Such a reusable formwork system can be used in the same way and with the same advantages for the production of free spaces or cavities in concrete walls and other concrete components. It can also be used with the same success in connection with other building materials that solidify or harden, provided that there is no bond between the building material and the hose or hoses, which can be ensured by choosing the appropriate hose material. Similarly, ^'and with equal success the reusable scarf can also ungssystem during the prefabrication of building elements of concrete or other curing or solidifying Bau¬ materials are used. In this way, ventilation and ventilation ducts or heating and cooling ducts can also be obtained overall in a very simple manner and with the saving of considerable costs for line pipes, especially when using waterproof concrete or the like, and water-carrying ducts. The Reusable formwork systems can be used to great advantage, particularly in large-scale buildings or prefabricated components in which hose lines up to approx. 100 can be used successfully.

A modified embodiment of a hose for liquid filling is shown in FIG. 3 in the liquid-filled state and in FIG. In the emptied state. In these figures, only one hose 41 of the type of the hoses 2 is shown in FIG. 1, but all hoses 2 according to FIG. 1 can be designed in this way.

The hose 41 according to FIGS. 3 and 4 is sealed at one end by a stopper 42, the stopper 42 being able to be provided with a vent valve in the manner of the vent valve 3 in FIG. 2. In this embodiment, the open end of the hose 41 is directly connected to a filling and emptying valve 43 in a sealing manner. The filling and emptying valve 43 can also be designed in the manner of the filling and emptying valve 6 in FIG. In a first position, namely a filling position, the filling and emptying valve 43 connects the inside of the hose 41 via a first bore 44 to a source for a liquid under pressure. In the illustrated second position, the filling and emptying valve 43 is closed, and shut off the interior of the ^'tube 41 to the outside. In a third position, namely an emptying position, the filling and emptying valve 43 connects the inside of the hose 41 via a second bore 45 to a conventional vacuum source, for example a suction pump, which closes } 5

Emptying the hose 43 is used; see . Fig. 4. An arrangement such as the one above without the vibrating device 30 can be used in conjunction with a building material such as flow concrete that does not require a vibrating effect during consolidation or hardening. Likewise, the vibrating device 30 can also be omitted in the reusable formwork system according to FIG. 1 if flow concrete is used as the building material. The branch 5 can then be connected directly to the filling and emptying valve 6.

The hose 41 is penetrated over a substantial part of its length by a helical compression spring 46 of a relatively large pitch. The presence of the helical compression spring 46 not only prevents the hose 41 from kinking or constricting under load, but also prevents the hose 41 from kinking or constricting when it is not straight, but e.g. should be laid in curves or around corners.

The helical compression spring 46 expediently has an outer diameter which is in the range from 5% to 25: ό, ie one twentieth to one quarter of the inner diameter of the hose 41. As shown in detail in FIG. 4, the tube 41 collapses after emptying and under the effect of the negative pressure of the negative pressure source, but is supported on the turns of the helical compression spring 46. In this case, the tube 41 detaches from the wall of the free space or cavity formed and is only in relatively loose contact with this wall in the area of the turns of the helical compression spring 46. In this way, the hose 41 or in the presence of Helical compression springs 46 in the tubes 2 of the formwork system shown in Fig.l remove all tubes 2 practically effortlessly from the free spaces or cavities formed.

5 and 6 show a side view and a

Top view of a further filler 50, which can be used in connection with the filler 1 according to FIG. 1 of the reusable formwork system, in order to produce branches from the free spaces or cavities obtained by means of the filler 1.

The further filler body 50 has a first end 51, which in each case faces a hose 52 in the manner of hose 2 in FIG. 1 or in the manner of hose 41 in FIG. From this end 51 extends a clamping device consisting of two resilient, arc-shaped clamps 53 which lie opposite one another and between them define an opening 54 for receiving the hose 52. Each individual spring clip 53 extends beyond the central axis 55 of the hose 52 in such a way that the free ends 56 of the spring clips 53 are at a distance which is smaller than the diameter of the hose 52 in the liquid-filled state. In the illustrated embodiment, the resilient brackets 53 have the shape of an arc of a circle, but they can also take any other shape that is suitable for achieving the releasable clamping connection with the liquid-filled hose 52.

The further filler body 50 has a second end 57 facing away from the resilient jaws 53 extending outwards, ie in a region 58 widening away from the resilient clamps 53. In this region 58, the filling body 50 is of a generally conical or frustoconical shape. Advantageously, this is Be¬ see rich 58 with a number of gradations 59 ver ^¬, adheres better whereby the additional filling body 50 in the solidifying or hardening building material such as concrete. 6, is a hollow body with an inner cavity 60. In this cavity 60 there is an inwardly projecting step or shoulder 61 for attacking a suitable tool with which the further filler 50 can be pulled out of the building material after solidification or hardening, leaving a further free space or cavity. This further free space or cavity forms a branch which starts from the free space or cavity which is formed by the associated hose 52 and extends to the surface of the component or component which has been formed from the building material.

FIG. 7 shows a polygonal, in particular square, configuration of the second end 57a or the outwardly widening region 53a of a further filler body 50a, which can be used instead of the further filler body 50 and is ent at its first end (not shown) ¬ speaking of the other packing 50 is formed. In the same way, other fillers with other circumferential designs can also be used where the circumstances so require. The other filler 50 and 50a form part of the reusable Schal ungssystem and allow the formation of smooth branches, the

»The free spaces or voids mentioned at the beginning run to the surface of the component or component. Such branches can be used to lay branches of electrical and other supply lines, but can also form branch ducts for ventilation and ventilation, for air heating or cooling, for air conditioning and other things. When using waterproof building material or concrete, such branches can also be used to guide water, namely for irrigation or drainage. Extinguishing water channels for fire extinguishing systems can also be formed in this way.

Claims

Patent claims

Reusable formwork system for the production of open spaces in a solidifying. Building material containing at least one filler filled with a medium and closed at one end, which passes through the building material and determines the free space to be formed, the filler remaining after the building material has solidified while leaving the respective free space the solidified building material can be removed for reuse, characterized in that the filler (1) is formed from at least one liquid-filled hose (2, 41, 52), the open end (43) of which is connected to a fill and drain valve (6, 43) is outside.

Formwork system according to claim 1, characterized in that the at least one liquid-filled hose (2,41, 52) is penetrated over a substantial part of its length by a helical compression spring (46).

3. Schal ungss stem according to claim 2, characterized in that the helical compression spring (46) has an outer diameter which is a twentieth to a quarter of the inner diameter of the liquid-filled hose (2.41, 52). 2.0 4. Formwork system according to one of claims 1 to

3, characterized in that the filling and emptying valve (6, 43) can optionally be connected to a vacuum source and that the hose (41) is connected to the vacuum source after the solidification of the building material and before its removal from the solidified building material st.

5. Formwork system according to one of claims 1 to

4, characterized in that the liquid-filled hose (2,41, 52) is connected at its open end to a vibrating device (30).

6. Formwork system according to claim 5, characterized in that the at least one liquid-filled hose (2,41, 52) parallel to the filling and emptying valve (6,43) connected to the vibrating device (30) i st.

7. formwork system according to claim 6, characterized in that the vibrating device (30) in the longitudinal direction of the liquid-filled hose (2,41, 52) reciprocating piston (33) in a cylinder (32), the is sealingly connected to a branch (5) of the hose and has a drive device for the reciprocating movement of the piston (33).

8. formwork system according to claim 7, characterized in that the drive device a drive motor (35) and a translation (34), via which the drive motor (35) is in drive connection with the piston (33).

9. Formwork system according to claim 8, characterized in that the translation (34) contains an eccentric (E).

10. Formwork system according to one of claims 5 to 9, characterized in that the Antriebsvor¬ direction in relation to the pressure determined by the piston stroke by adjusting the piston stroke and in relation to the frequency of the reciprocation of the piston (33) by Setting the speed of the drive motor

(35) is steplessly controllable in adaptation to the respective operating conditions.

11. Formwork system according to one of claims 1 to 10, characterized in that the at least one hose (2,41, 52) is provided at the closed end with a vent valve (3) i st.

12. Formwork system according to one of the preceding claims, characterized in that the at least one hose (2, 41, 52) is provided in the course of its length with an overpressure relief valve (7) which responds to a predetermined pressure.

13. Formwork system according to one of claims 1 to

12, characterized in that at least one further packing (50) is detachably connected to the at least one hose (2.41, 52). 14. Formwork system according to claim 13, characterized in that the further filler (50) at a first end (51) contains a clamping device for releasable connection with 'the f1 üssi gkei ts- filled Schlau-ch (2,41, 52) .

15. Schal ungssys system according to claim 14, characterized in that the clamping device consists of at least two resilient brackets (53) which is from the first end (51) of

Filler (50) on opposite sides beyond a central axis (55) of the liquid-filled hose (2,41,52) and define an opening (54) for receiving the liquid-filled hose (2,41,52) and that the free ends (56) of the resilient clips (53) have a distance which is smaller than the diameter of the liquid-filled hose (2,41,52).

16. Formwork system according to one of claims 13 to 15, characterized in that the further filler (50) forms a second end (57) facing away from the resilient brackets (53) and at this second end (57) with a widening Area (58) is formed and in the widening area (58) is provided with a number of gradations (59) on its circumference.

17. Formwork system according to claim 16, characterized in that the further filler (50) forms a hollow body and is provided with an inwardly projecting step (61). 18. Formwork system according to one of claims 1 to 17, characterized in that guide elements (13) for the liquid-filled hose (2, 41, 52) are provided in a reinforcement (10) for the building material.

19. Formwork system according to claim 18, characterized in that the guide elements (13) for the liquid-filled hose (2.41,

52) consist of a large number of guide elements (13) arranged one behind the other, which can be snapped into place with a first structural steel mat (11) of the reinforcement (10) and the first structural steel mat (11) and a second structural steel mat (12) of the reinforcement (10 ) keep at a distance from each other and that the liquid-filled hose (2, 41, 52) extends (13) through the large number of guide elements arranged one behind the other.

20. Formwork system according to claim 18, characterized in that the liquid-filled hose (2, 41, 52) runs between adjacent rows (1.4) of a plurality of successively arranged guide elements (13) which snap into place with a first structural steel mat (11) of the reinforcement (10) can be connected and the first structural steel mat (11) and a second structural steel mat (12) of the reinforcement

(10) keep a distance from each other.

21. Formwork system according to one of claims 13 to 20, characterized in that each guide element (13) from a plurality of Winkelele- 1 elements (15) and at least one locking element

(16) consists of resilient material which are connected to one another at the tip and near their free ends, and in that the at least one locking element (16) of each guide element (13) has a locking part (16a) at each free end for locking connection with of the first structural steel mat (11).

22 22 formwork system according to claim 21, characterized in that the locking parts (16 a) of bent free ends of the at least one locking element (16) are formed.

15 23 formwork system according to claim 22, characterized in that each locking part (16 a) forms a hook-shaped bent locking part.

24. Formwork system according to claim 22, characterized in that each latching part (16a) forms an angled latching part which, in the installed state, extends at an angle directed towards the first structural steel mat (11).

25 25. Formwork system according to one of claims 21 to 24, characterized in that the latching parts (16a) of the at least one latching element (16) in adjacent elements (11a, 11b) of the first structural steel mat (11) are engaged and that

30 elements (11a, 11b) between the associated

Locking part (16a) and an associated strut (18) are arranged, which connects the angle elements (15) and the at least one locking element (16) with each other near their free ends.

35 26. Formwork system according to one of claims 22 to 25, characterized in that the Winkelele¬ elements (15) of each guide element (13) extend beyond the free ends of the at least one latching element (16) and at each free end with a Protective device are seen.

27. Formwork system according to one of claims 18 to 26, characterized in that the Winkelele¬ elements (15) and the at least one locking element (16) of each guide element (13) in the region between the tips and the free ends connected to each other are.

28. Formwork system according to one of claims 5 to 27, characterized in that the filling body (1) consists of a series of hoses (2) connected in parallel to a common supply line (4) and that the vibrating device (30) connected to the common supply line (4).

29. Formwork system according to one of the preceding claims, characterized in that the

Packing body (1) is covered with a perforated film.