EP1699984A1

EP1699984A1 - Formwork element and formwork

Info

Publication number: EP1699984A1
Application number: EP04765922A
Authority: EP
Inventors: René P. SCHMID
Original assignee: Agrar Chemie AG
Current assignee: Agrar Chemie AG
Priority date: 2003-10-13
Filing date: 2004-10-11
Publication date: 2006-09-13
Also published as: WO2005038156A9; DE10347425A1; WO2005038156A1

Abstract

The invention relates to a formwork element for lost formwork for sealing concrete sections off from one another. Said formwork element is substantially constituted of a self-supporting lattice body (2) from a plastic material comprising an exterior surface (3) and an interior surface (4) facing the concrete, and longitudinal edges (5, 6). The invention is characterized in that anchoring elements (7) are formed onto the interior surface (4).

Description

Formwork element and formwork

The invention relates to a shuttering element and a shuttering according to claims 1 and 43.

It is known from DE 41 33 055 AI to use joints made of weldable plastic for sealing joints that are formed between two abutting surfaces of two concreting sections, which have an L-shaped cross-section from a lower and a 90 ° are arranged for this purpose. The lower leg has at least one profile projection on its upper side. The lower leg of the profile is connected to the concreting section via this profile projection. The thigh is in close proximity to the side wall of the joint and thus angled by 90 ° to the lower leg. These profiles are each arranged on the edge of two joint-forming concreting sections, so that when they meet, the thighs of the profiles meet in the joint to be sealed, which are then welded to one another in a sealing manner, the weld seam being located below the surface of the concreting sections.

Furthermore, a sealing strip is known from EP 0 297 730 AI, which consists of a moldable plastic such as polyvinyl chloride. In the embodiment that is used on the edge of two adjacent, joint-forming concreting sections, projections are arranged on the two ends of the sealing strip and in the middle, which serve as anchors in the adjacent concreting section. At these projections swelling tapes are attached in part, which swell under water supply. In addition, EP 0 804 656 B1 discloses a joint lath which has a base web on which an injection channel with an injection opening is arranged in the region of the longitudinal center. This joint lath is made of a thermoplastic and has a high handling stiffness. High-pressure polyethylene is used as the thermoplastic, which, thanks to its hot formability, enables it to be adapted to complex shapes, angles and curves, with the joint slat being embedded in the center of the respective concrete section.

Both the profile from DE 41 33 055 AI and the sealing strip from EP 0 297 730 AI as well as the joint batten from EP 0 804 656 B1 have been designed for the sealing of concrete joints. However, they do not enable simultaneous shuttering.

Formwork is required for the manufacture of a concrete component to enable the fresh concrete to be taken up. The formwork is a tool that is only used for a short time and that applies to the different components, such as Foundations, walls, columns and ceilings must be coordinated. The formwork has the task of withstanding the weight of the fresh concrete and the loads during concreting, i.e. that its shape and position must not change even after concreting. This is guaranteed by the interaction of the formlining and the supporting structure.

The formwork skin is the part of the formwork that comes into direct contact with the fresh concrete when concreting. It gives the component the shape and determines the appearance of the surface. The formlining must remain tight during concreting and during the hardening time of the concrete and evenly distribute the loads that occur on the supporting structure. The formwork skin is composed of formwork panels that differ in the material used, the size and the connection options. Steel plates or boards can be considered as possible materials.

The supporting structure has the task of absorbing the loads of formwork, reinforcement and fresh concrete as well as workers, equipment and machines and transferring them to the sub-surface. In addition, the supporting structure must absorb the vibrations that occur during concreting and the fresh concrete pressure.

The supporting structure consists of formwork girders, formwork supports and the bracing of the formlining.

Further, there is also shuttering ^elements' which remain in the component. These are used when stripping is not possible or uneconomical.

The object of the invention is to provide a device which can be used both for sealing concrete joints and as a lost formwork element which remains in the concrete for the production of a component made of concrete and which has a relatively low weight, which means that it is on the construction site is easy to handle, process and connect, and is easy to manufacture or mold.

The object is achieved by a device having the features of claim 1. Further advantageous embodiments of the invention are characterized in the subclaims.

Exemplary embodiments of the invention are explained in more detail with reference to the drawings. Show it:

1 shows an exemplary embodiment of a sound baffle according to the invention in cross section; FIG. 2 shows a further exemplary embodiment of a noise barrier with injection channel according to the invention in cross section;

3 shows an arrangement of a sound barrier at the edge of two concreting sections;

Fig. 4 shows the detail "variant 1" in Fig. 3 enlarged;

FIG. 5 shows an application example of the noise barrier according to FIG. 3 with the detail "variant 1", in cross section;

Fig. 6 shows the detail "variant 2" in Fig. 3 enlarged;

Fig. 7 shows an application example of the sound barrier according to Fig. 3 with the detail "variant 2", in cross section.

FIG. 1 shows an exemplary embodiment of the sound absorbing batten 1 according to the invention with a batten body 2 which has dimensions from 2 to 6 m for the length, in particular from 3 to 5 m; from 10 to 120 cm for the width, in particular from 20 to 80 cm; and from 3 to 10 mm for the thickness, in particular from 5 to 8 mm. This slatted body 2 also has a particularly smooth outer surface 3 and an inner surface 4 on the concrete side, and longitudinal edges 5, 6, wherein anchoring elements 7 are arranged on the inner surface 4, preferably at equal distances from one another. These anchoring elements 7 have anchor webs 8 which extend in the longitudinal direction and which are shaped with a width of 1 to 12 cm, in particular 2 to 8 cm and a thickness of 3 to 10 mm, in particular 5 to 8 mm. On the longitudinal edges of these anchor webs 8 there are in each case oval-shaped beads 9 which have a larger cross section than the thickness of the anchor webs 8. The anchoring elements 7 are arranged at a certain angle, preferably at an angle of 90 ° to the slatted body 2. The slat body 2 is formed symmetrically to a transverse center plane 10 extending perpendicular to the slat plane.

No anchoring element 7 is arranged in the area of the plane 10 of the slat body 2. The anchoring elements 7 serve as a labyrinth seal and extend the path of the penetrating water through their anchor webs 8 and the beads 9.

The slat body 2 is made of a hard plastic, in particular HDPE (high-pressure polyethylene), and has inherent rigidity. The hard plastic is a thermoplastic that is dimensionally stable and resilient in a temperature range from -20 to +40 ° C, in particular from -10 to +30 ° C.

By their relatively low weight due to optimized dimensions, in particular with regard to the inherent rigidity is the waste ^'stale latte one easy to handle on site, processed and assembled.

In an advantageous embodiment of the invention, the sound absorbing batten 1 is combined in the area of its transverse center plane 10 on the inner surface 4 with an injection channel 11 (FIG. 2), which enables a joint to be subsequently sealed by pressing sealing material into defects in the joint area. The preferably integrally formed in ection channel 11 is delimited by a top wall 12, two side walls 13, 14 and two partition walls 15, 16. The top wall 12 is incorporated into the slatted body 2. The side walls 13, 14 are spaced apart from one another and are preferably arranged perpendicular to the ceiling wall 12 and thus also to the slatted body 2. Again, perpendicular to the side walls 13, 14 and in a plane opposite each other, the intermediate wall webs 15, 16 are arranged. The walls 12 Wall webs 15 and 16 are spaced apart by a slot 17. Injected sealing material can escape through this slot 17.

The side walls 13, 14 are preferably extended above the region to which the intermediate wall webs 15, 16 adjoin, and open into longitudinal side edges 18, 19, so that they join the adjacent wall webs 15, 16, which are interrupted by the slot 17, define a U-shaped recess or groove for receiving an open-cell filter foam strip 20. This filter foam strip 20 fills with sealing material when injecting sealing materials and thus forms a further channel section running parallel to the injection channel 11 for receiving and distributing the sealing material. The cell size of the open-cell filter foam strip 20 is selected such that no concrete penetrates the injection channel 11 through the slot 17 during concreting. However, the filter foam strip 20 is permeable to the sealing material injected under pressure into the injection channel 11, so that the sealing material can spread outward into an undesirable cavity and can ^' fill' it in a sealing manner.

In a special embodiment, the slot 17 of the injection channel 11 is covered by a closed-pore, elastic material band, such as a rubber band (FIG. 2), which is impermeable to the sealing material. The closed-pore, elastic material has a rectangular shape in cross section with a broad side surface 21 covering the slot 17, a broad side surface 22 lying parallel to the broad side surface 21 on the concrete, and two narrow side surfaces 23, 24 which abut the longitudinal side edges 18, 19. The cross-sectional shape of the channel delimited by the longitudinal side edges 18, 19 and the intermediate wall webs 15, 16 is adapted to the shape of the closed-pore elastic material. If sealing material is injected into this injection channel 11 after pouring and setting the concrete, it lifts the closed-pore rubber from the intermediate wall webs 15, 16 and from the longitudinal side edges 18, 19 of the channel in a valve-like manner and can step out into adjacent cavities. The rubber is compressed. When the pressure decreases, the rubber returns to its original shape, so that it rests again flat against the intermediate wall webs 15, 16 and on the longitudinal side edges 18, 19 of the groove of the noise barrier 1 and closes the slot 17 of the injection channel 11 in a valve-like manner.

FIG. 3 shows an arrangement of a formwork slat 1 according to the invention, which is embedded on the edge or on an outer surface in the joint area of two joint-forming concreting sections 25, 26, wherein it. 28 is perpendicular and thus also arranged to the forming abutment surfaces 27 to a joint 29 ^'. The injection channel 11 is arranged in the region of the joint 29, the outlet slot 17 expediently being located at the level of the joint.

Before the first concreting process, the baffle 1 is preferably fastened to a reinforcement, for example with wire rope or the like, the fastening of the baffle 1 being simple due to its high inherent rigidity and because it is self-supporting. At the same time, the sound-absorbing batten 1 can be stabilized from the outside by carrier elements (not shown), so that the stability as a sound-removing element is increased. The sound barrier 1 is designed as a lost formwork element and thus remains in the concreting sections 25, 26.

The compatibility of the concrete with the sound-absorbing batten 1 made of hard plastic, in particular HDPE, is advantageous here and is further favored due to the high hard forces at the interfaces. Liability at the interfaces between the The baffle 1 and the concrete can be improved by roughening the surface on the inner surface 4 of the baffle 1 or incorporating quartz sand or similar fine grains, so that a firm and tight connection between the baffle 1 and the concrete is achieved.

Figure 4 shows an additional embodiment of the baffle 1, wherein notches are arranged in the region of the longitudinal edges 5, 6. These notches serve as predetermined breaking points 30.

In a variant 1 of the sound barrier 1, a slat web 31 projecting, preferably at an angle of 90 °, is integrally formed on at least one longitudinal edge 5, 6, the longitudinal edge 5, 6 passing over a predetermined breaking point 30 into the slat web 31.

Figure 5 shows an application example of a Abschallatte 1 Variant 1. In this case, provided that ^'a board-like support member 32 which, for example made of wood is made, is set below the bar web 31 and by means of nails 33 which are placed above the bar web 31, on the bar web 31 is attached. The support element 32 on the one hand supports the stability and on the other hand avoids the contamination of the noise barrier 1. To remove the support element 32, it is angled and broken off together with the crossbar 31 via the predetermined breaking point 30.

The support element 32 can also be fastened by nails 34 inserted over the inner surface 3 of the shuttering element 1 in the area of the slat web 31, a further predetermined breaking point 30 being provided below the nail locations, so that a further removable slat web 31 a is formed, which is connected to the Removing the slat 31 or thereafter with nails 34 is removed. Figure 6 shows a further embodiment of the baffle 1, wherein a slat web 35 is formed in a lower end region of the baffle 1 with a predetermined breaking point 37, which projects beyond the base plate level 36 of the concreting section 25 (variant 2).

FIG. 7 shows an application example of the noise barrier 1 with variant 2. It is provided that a support element 38 is attached below the base plate level 36 and is fastened by means of nails 39, which are attached to the outer surface 3 of the noise barrier 1, via the crossbar 35.

To remove the support element 38, it is angled and separated together with the slat web 35 via the predetermined breaking point 37.

Claims

claims

1. formwork element for a lost formwork for sealing between concreting sections (25, 26), characterized in that it consists essentially of a self-supporting lath body (1) and an outer surface (3) and a concrete-side inner surface (4) and longitudinal edges (5, 6) 2) consists of plastic, anchoring elements (7) being molded onto the inner surface (4).

2. shuttering element according to claim 1 ,. d a d u r c h g e k e n n z e i c h n e t that the slatted body (2) has a length of 2 to 6 m, in particular 3 to 5.

3. ^' shuttering element according to claim 1 and / or 2, characterized in that the slatted body (2) has a width of 10 to 120 cm, in particular from 20 to 80 cm.

4. shuttering element according to one or more of claims 1 to 3, characterized in that the slatted body (2) has a thickness of 3 to 10 mm, in particular 5 to 8 mm.

5. shuttering element according to one or more of claims 1 to 4, d a d u r c h g e k e n n z e i c h n e t that the outer surface (3) of the slatted body (2) has a smooth surface.

6. shuttering element according to one or more of claims 1 to 5, d a d u r c h g e k e n n z e i c h n e t, d a s s are the anchoring elements (7) on the slat body (2) extending in the longitudinal direction anchor webs (8).

7. shuttering element according to claim 6, d a d u r c h g e k e n n z e i c h n e.t, that the anchor webs (8) have a width of 1 to 12 cm, in particular of 2 to 8 cm.

8. shuttering element according to claim 6 and / or 7, d a d u r c h g e k e n n z e i c h n e t, that the anchor webs (8) have a thickness of 3 to 10 mm, in particular 5 to 8 mm.

9. shuttering element according to one or more of claims 6 to 8, d a d u r c h g e k e n n z e i c h n e t, d a s s arranged on the anchor webs (8), in particular on the longitudinal edges, beads (9).

10. shuttering element according to claim 9, characterized in that the beads (9) of the anchor webs (8) are oval in cross-section.

11. shuttering element according to claim 9 and / or 10, d a d u r c h g e k e n n z e i c h n e t, that the beads (9) have a larger cross section than the thickness of the anchor webs (8).

12. shuttering element according to one or more of claims 1 to 11, d a d u r c h g e k e n n z e i c h n e t, that the anchor webs (8) are arranged projecting at a certain angle to the slatted body (2).

13. shuttering element according to claim 12, d a d u r c h g e k e n n z e i.c b. The anchor webs (8) are arranged so that they protrude at an angle of 90 ° to the slatted body (2).

14. shuttering element according to one or more of claims 1 to 13, d a d u r c h g e k e nn z e i c h n e t, that the slat body (2) is symmetrical to a transverse center plane (10) extending perpendicular to the slat plane.

15. The shuttering element according to claim 14, which has no anchoring element (7) arranged in the region of the transverse center plane (10) of the slatted body (2).

16. shuttering element according to one or more of claims 1 to 15, characterized in that the slatted body (2) is formed from a hard plastic, in particular HDPE (high pressure polyethylene).

17. shuttering element according to claim 16, d a d u r c h g e k e n n z e i c h n e t, that the hard plastic is a thermoplastic plastic.

18. shuttering element according to claim 17, d a d u r c h g e k e n n z e i c h n e t, that the thermoplastic is dimensionally stable in a temperature range from -20 ° C to +40 ° C, in particular from -10 to +30 ° C.

19. shuttering element according to claim 17 and / or 18, d a.d u r c h g e k e n n z e i c h n e t, that the thermoplastic material in a temperature range from -20 to +40 ° C, in particular from -10 to +30 ° C is resilient.

20. shuttering element according to one or more of claims 1 to 19, d a d u r c h g e k e n n z e i c h n e t, that the slatted body (2) is inherently rigid.

21. shuttering element according to one or more of claims 1 to 20, d a d u r c h g e k e n n z e i c h n e t, that a two shuttering elements can be connected by hot forming.

22. shuttering element according to one or more of claims 1 to 21, d a d u r c h g e k e n n z e i c h n e t, that an injection channel (11) is arranged in the region of the transverse center plane (10) of the shuttering element on the inner surface (4).

23. shuttering element according to claim 22, characterized in that the in ection channel (11) is integrally formed.

24. shuttering element according to claim 22 and / or 23, d a d u r c h g e k e n n z e i c h n e t, that the injection channel (11) by a ceiling wall (12), two side walls (13, 14) and two partition walls (15, 16) is limited.

25. shuttering element according to claim 24, d a d u r c h g e k e n n z e i c h n e t, that the slatted body (2) forms the ceiling wall (12) of the injection channel (11).

26. shuttering element according to claim 24 and / or .25, that a d u r c h g e k e n n z e i c h n e t, that the side walls (13, 14) are spaced apart.

27 ^' . Shuttering element according to claim 26, characterized in that the side walls (13, 14) are arranged perpendicular to the ceiling wall (12);

28. shuttering element according to one or more of claims 24 to 27, d a d u r c h g e k e n n z e i c hn e t, that the intermediate wall webs (15, 16) perpendicular to the side walls (13, 14) and are arranged opposite one another in one plane.

29. shuttering element according to one or more of claims 24 to 28, characterized in that the top wall (12), the side wall (13, 14) and the intermediate wall webs (15, 16) form a rectangular cross-section channel.

30. shuttering element according to one or more of claims 24 to 29, d a d u r c h g e k e n n z e i c h n e t, that the intermediate wall webs (15, 16) are spaced apart from one another by a slot (17).

31. shuttering element according to one or more of claims 24 to 30, characterized in that the side walls (13, 14) over the area to which the intermediate wall webs (15, 16) adjoin, are extended, and in longitudinal side edges (18, 19) are arranged mouth.

32. formwork element according to claim 31, d a d u r c h g e k e n n z e i c h n e t that the intermediate wall webs (15, 16) together with the longitudinal side edges (18, 19) form a U-shaped recess.

33. shuttering element according to claim 32, d a d u r c h g e k e n n z e i c h n e t, as an open-celled filter foam strip (20) is arranged in the U-shaped recess.

34. shuttering element according to claim 33, d a d u r c h g e k e n n z e i c h n e -t, that the filter foam strip (20) is arranged as a channel section running parallel to the injection channel (11).

35. shuttering element according to claim 33 and / or 34, characterized in that the filter foam strip (20) is permeable to sealing materials injected under pressure in the injection channel (11).

36. shuttering element according to claim 32, d a d u r c h g e k e n n z e i c h n e t, which is arranged in the U-shaped recess a closed-pore, elastic material band.

37. shuttering element according to claim 36, d a d u r c h g e k e n n z e i c h n e t, which is arranged in the U-shaped recess a rubber band.

38. Formwork element according to claim 37, characterized in that the rubber band has a rectangular cross-section with a broad side surface (21) covering the slot (17) and a broad side surface (22) parallel to the broad side surface (21) and two narrow side surfaces (23 , 24) which are arranged adjacent to the longitudinal side edges (18, 19).

39. shuttering element according to one or more of claims 1 to 38, characterized in that in the region of the longitudinal edges (5, 6) breakable narrow slat webs (31, 31a, 35) are arranged, which with predetermined breaking points (30, 37) with Slat body (2) are connected.

40. Shuttering element according to one or more of claims 1 to 39, that is a molded crossbar (31) protruding at an angle of 90 ° from at least one longitudinal edge (5, 6).

41. shuttering element according to one or more of claims 1 to 40, characterized in that it is roughened superficially on the inner surface (4).

42. Shuttering element according to one or more of claims 1 to 41, d a d u r c h g e k e n n z e i c h n e t, which is roughened with quartz sand on the inner surface (4).

43. formwork with a formwork element according to one or more of claims 1 to 42, characterized in that the formwork element (1) of the outer surface (3) two a joint (29) forming concreting sections (25, 26) arranged in the joint area extending along the joint is, it is arranged perpendicular to the abutting surfaces (27, 28) of the concreting sections (25, 26) and to the joint (29) and seals the joint.

44. Formwork according to claim 43, d a d u r c h g e k e n n z e i c h n e t that the injection channel (11) is arranged in the region of the joint (29).

45. Formwork according to claim ^'44 , characterized in that the slot (17) of the injection channel (11) is arranged at the level of the joint (29).

46. shuttering element according to one or more of claims 1 to 45, characterized in that an eg board-shaped support element (32) beneath the slat web (31) and is arranged nailed against the shuttering element by means of nails (33).

47. Shuttering element according to one or more of claims 1 to 46, characterized in that a slat web (35) is formed in a lower end region of the shuttering element with a predetermined breaking point (37) on the longitudinal edge 6, which is preferably via a base plate level (36) of the concreting section (25) is arranged projecting.

48. shuttering element according to one or more of claims 1 to 47, d a d u r c h g e k e n n z e i c h n e t, that a supporting element (38) is arranged below the base plate (36) by means of nails (39) on the slat web (35).