DE2339265A1 - Formwork clamp anchor recesses for stressed concrete units - with one form body rotatable relative to form wall, and second relative to first - Google Patents

Abstract

This is for production of an end finishing form surface, fitting the ends of stress anchors in prestressed concrete reinforcement. The form body assembly, adjustable relative to the form wall and the stress anchor's end, comprises two bodies, one, when assembled, with a flat sliding surface, fitting against the form wall; and a sliding surface, not parallel to the wall, on the other side, working in conjunction with a sliding surface on the second body, which also has a flat surface, not parallel to this, on its other side. It is the first which is rotatable relative to the form wall during assembly, and the second which is displaceable or rotatable in turn relative to the first. Form bodies and wall may be pierced by a tension element passing through them all. Simple prefabricated components can be easily assembled on site.

Description

Patent attorneys Dipl.-Iiso. F. Weickminn, ° ³

Dipl.-Ing. H. Weickmann, Dipl.-Phys. Dr. K. Fincke Dipl.-Ing. F. A. Weickmann, Dipl.-Chem. B. Huber

St / th

S MUNICH «6, DEN

POST BOX «60» 20

MDHLSTRASSE 22, RUFNUMAiER 98 3921/22

LEOlTHARD MOLL KG
8 Munich 2, Lindwurmstr. 129/131

Formwork arrangement for clamping head niches in Prestressed concrete bodies

The invention relates to a formwork arrangement for the production of the end faces of the tensioning anchors of tensioning * Concrete reinforcements adapting end section to the clamping surface of a tensioner concrete body, comprising a formwork wall and a concrete side attached to the formwork wall, opposite this and the Front side of the tensioning anchor adjustable formwork assembly.

When producing prestressed concrete with a subsequent bond, the pail usually occurs that the tendon axes are not perpendicular to the formwork wall at the clamping head ends. When prestressing, ie when pulling out the individual tendons, the tensioning jack must be supported against the front of the tensioning head of the respective tendon, which in this case is not parallel to the formwork wall. There is therefore either the option of adapting the cladding to the front of the clamping head by means of a special shape. This is a very laborious process. On the other hand, it is possible to use a wedge-shaped recess body for the continuously continuous longitudinal wall and the front

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side of the clamping head, which is so large that in the after The clamping niches resulting from the shuttering and the removal of the filling body can be brought into the clamping press.

The second solution mentioned above is currently in practice realized as follows: The wedge-shaped IHillkörpsr made of wood oäer also made of foam according to the angular position of the spray head specially cut to size or, if the angle of inclination is low, a foam sheet with the same die throughout verv / ends, the angle compensation by pressing the Foam sheet is created at the required location. With this latter procedure, there is already a small difference in angle the risk that the deformability of the Schauastoffs is insufficient and when attaching the clamping heads to the formwork wall the tendons are inadvertently deformed.

Furthermore, a conical tube, in particular a plastic tube, can be attached to the front of the clamping head, which is attached in this way is that it, starting from the clamping head, expanded. This pipe is longer than the distance between the formwork wall and Front of the clamping head and thus pierces the formwork wall, so that this must be sawn out accordingly. Since the The penetration surface to be cut out is an elliptical surface, the shape and size of which depends on the respective Y-angle between the clamping head Depending on the front and the formwork wall, it is not possible to create uniform recesses despite the use of uniform filler bodies to be provided in the formwork wall, so that there is a considerable possibility of error when making the recesses arises.

Attempts have been made to alleviate the latter difficulties to overcome that one provides a standardized opening in the shuttering wall, which is made with a perforated plate Weleh-FVC is closed. The perforated plate is through the pipe or pierce a so-called recess pot and join against the circumference of this tube. This solution has though some advantages, however, it is not always satisfactory with regard to the closure between the perforated plate and the recess pot.

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The invention is therefore based on the object of creating a formwork arrangement of the type mentioned at the outset, which consists of prefabricated, can be used on the construction site by simple operations.

According to the invention, this object is achieved by a formwork arrangement of the above type, which is characterized in that the formwork body arrangement is formed by two formwork bodies the first of which in the assembled position rests with a flat sliding surface on the dex * formwork wall and on the opposite Side has a sliding surface deviating from a plane parallel to the formwork wall, and the second with it a sliding surface cooperating with this sliding surface on the one side and with a flat surface on that of the first Formwork body is provided facing away from the concrete side, where the first formwork body - at least during the Assembly process - rotatable relative to the formwork wall and the second formwork body - at least during the assembly process - according to the shape of the adjacent sliding surfaces the formwork body is displaceable or rotatable relative to the first formwork body.

The formwork bodies are preferably penetrated by a tension element which at the same time penetrates the formwork wall.

On the air side of the formwork wall, two are preferably also penetrated by the tension element, in terms of shape and arrangement the formwork bodies essentially corresponding auxiliary bodies provided, which can be smaller than the formwork body.

The formwork body arrangement based on the Formwork wall, tapered in such a way that the formwork body are removable from the set concrete.

The tension element preferably runs through the formwork body and optionally the auxiliary body in recesses designed in this way are that they can twist or pivot any possible

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the 8ohalungskörper ιιηά auxiliary body with each other or egg formwork body and I-Iilfakbody give the formwork wall allow,

The arrangement of Selialuiig's bodies and the auxiliary bodies can expediently be interlocked against the formwork wall with the help of the suction device.

Preferably οίε τοη the formwork wall applied sliding surface of the first formwork, gskörpers at an acute angle to eggs E'oene of the formwork wall ET) ene, and the adjoining sliding surface and the ΐ et one-sided "surface of the second formwork. in. ElDer.er standing at the same acute angle to one another. "

Appropriately, the 5cha "'mgskörper iiiroii for formwork v / and towards extended slant '"egelstüjnpfs gö ^

The first shell has a concentric and vertical cylindrical extension, which leads to the face of the G-guiding surface, and the protruding part is this? 'Jleitflache eii'iii-.irr ¹ : _f -jirid the sv / eit-e .Bclialungskörper a concentric and aen ^ cecb. ^ -Ra aer be on the other side IFlache, in through-hole slightly -.tuer that of the \ 3agelements lying cylindrical A

The second Sühal ^ ngö ^ dr *;.: ^ Xanri aa .; "· 1;? Γ 'aera traten 3chalungs ~

3-le facing the body: .t surface .i-inef 12: a recess of the harvested Scaalang body engaging]: »as -Jiilirun ^ serving annular projection: iii ;: ^% vei3eti, ₍

lac:. »* Ip ^{>% s} '" i ". ^ «N ^r · -, τ ^ ·» ^ n .e ' ⁿ n &Iungsv; and

In this case, the second Sohaluiige body can be a truncated cone be designed with a "flat surface on the concrete side"

first In this embodiment, "further dsi / Sahali" .angst: ^ psr has a tapering, fconsent ^ iscliSi -ferioSiter-shaped Recognition, while 4 is the second Solialimgs body concentric and vertical - starting from the 3? läoli® on the concrete side cylindrical recess, the-sn I \ 5.rehms3ser slightly above that of the tension element *

According to a further "preferred completion requirement of the invention the first formwork unit becomes auroli one with eggs flat surface in the assembled position against fixed Solialungsw & nd adjacent cylinder section formed and dsr against you cylindrical sliding surface of the first holder body abutting second formwork body has on the first formwork body facing side a corresponding sliding surface designed as a cylindrical recess · the second formwork body can have an approximately trapezoidal cross-section, the long side is formed by the circular arc of the sliding surface, with a straight line being provided on the concrete side.

The first formwork body expediently has einn as a recess The slot running transversely to the cylinder axis and converging to the formwork wall Mn, while the second Sclialusiggkörper a concentrically and perpendicularly extending from the concrete-side area, Has a cylindrical recess, the diameter of which is slightly greater than that of the tension element this version is the first aursli unit Half cylinder formed.

To span a distance between second fssia "shuttering body and a remaining in the concrete * with eggs of the clamping device ögaiirüiülse associated clamping anchor can be provided, which in the region of the circumference of the clamping anchor is braced against this Bistanzhülse ¹ a. The second Sohalraigs body can have a recess for receiving and guiding this BIstanshülse.

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The 5bhalu: ig bodies germinate; iv.y ^ snr .. a? ae ^: J.>rver> / e: iöung is not sought, also order from zv.vs audible material such as Eart ~ foam or the like *

The formwork arrangement according to the invention is extremely easy to manufacture and and enables a suitable setting over a very wide range i ^ i: tos. Angles sv / ischen dem Tensioning element of the stress level αηί of the formwork wall.

Further details »Features and gate parts of an invention result can be derived from the following Ssn B 53 ^ hr sibling of exemplary embodiments with reference to the attached drawing.

Figure 1 shows a section 3 of a first embodiment of the invention together with the end pieces of the tensioning device;

Pig. 2 and 3 are a view and sectional view of the clamping body of this embodiment in a position in which the clamping member is perpendicular hits the formwork wall;

Pig, 4 and 5 show the same Sehalraigskörper at a slant to the shuttering wall tapering en tendon j

Pig, 6 shows a section through a second and third embodiment of the invention that are identical in this respect.

In the 31g. 1 shows the overall representation of an embodiment of the socket arrangement according to the invention, 1 denotes the formwork wall on which the first formwork body 2 is supported, against which the second formwork body is in turn supported. On the side facing the formwork wall 1, the first bracket body 2 has a surface 4 _f which enables the first formwork to be rotated with respect to the formwork wall. On the side facing away from the formwork wall, the first bracket body has a sliding surface 5, on which the sliding surface β of the second formwork body 5 slides. Due to this construction, it is possible to put the first formwork body opposite the formwork wall mi5, the formwork body below one another

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2 3 3.S 2 6 5

to twist. This can prevent the inclination of the face of the tension anchor 12 dependent angle between the concrete side Surface 8 of the second formwork body 3 and the formwork wall 1 can be varied from 0 ° to an angular position »see from the addition of the helix angles Äsr "both, l ~ e ± l-shaped trained formwork body. results (cf. in particular also Pig, 2 through 5), in any direction. this happens in that on the one hand the first formwork body 2 opposite the formwork wall 1 and on the other hand the second formwork body 3 is rotated relative to the first formwork body 1, as from Pig. 2 to 5 can be seen immediately »

Since the tension element 7 always traverses the second formwork body 3 concentrically to the concrete-side surface 8 and perpendicularly starting from this, the recess 9 of the second formwork body is designed concentrically to the "bed-side surface waä somewhat larger than the diameter of the tension element 7, so that this can be passed through freely **.

Because of the different heights of the formwork ^ ί heel :: against each other and thus the tension element 7 in Sesug on Son srsten Formwork body 2 has this sine larger Ausnelinimg 10, the concentric and perpendicular to the sliding surface 3 -5s3 first Formwork body is designed as a cylindrical recess.

For mutual guidance at Terörefcimg der Sciiali: ngskörper against one another is a projection 11 on the second shell body 3 formed »the in the AusAiehaamg 1C-des egg'Suen formwork body ring in a ring / **

V *

In the case of the Sisellang of the sash bodies 2, 5 shown in FIGS. 2 and 3, they are in 3esug aufedranäer gsSrsin ₃ -Sass oae - not shown - tendon perpendicular zs.ii- -lie formwork wall 1 meets. In this 2weclc iie sceilf ^ n:! -? trained formwork bodies so against one another irersci.c ': he. If the wedge angles o (- cancel out against each other "jmä -äie Ί - ^ ons side! • Pool 8 of the second sonalization body J lies parallel to the formwork wall 1. This! surface 3 lies, as in Pig. 2. \ nd 3 is shown against a stressing anchor 12 explained later

In Pig. 4 and 5 are the formwork bodies 2 and 3 against each other twisted so that their wedge angles add up and form an angle 2 <%, which is also the deviation of the tendon of the vertical position with respect to the formwork wall 1 corresponds.

The Pig. 2 and 3 on the one hand and 4 and 5 on the other hand represent the extreme positions caused by the example shown Shutter body shown are made possible. In the case of steeper inclines, formwork units with a larger one can of course be used Wedge angles can be used · By rotating the formwork bodies relative to each other, different angles of inclination of the concrete-side Surface 8 of the second formwork body can be adjusted to formwork wall 1. In addition, the orientation of this Surface 8 with constant inclination to the formwork wall by rotating the two formwork bodies together on the Formwork wall can be adjusted.

From Fig. 1 it can also be seen that on the air side of the formwork wall Auxiliary body are provided, which allow the same angular inclination as the formwork body 2, 3 and thus a Create compensation for supporting the tension element. These auxiliary bodies, a first auxiliary body 13 and a second auxiliary body 14, are designed in the form corresponding to the ächalungskbodyern, so that with the appropriate setting of the auxiliary body the air-side Boundary surface 15 of auxiliary body 14 parallel to the concrete side surface 8 of the second formwork body 3 is located. Against this interface 15 is then supported via a washer 16 by a nut 17, which is screwed onto the tension element provided with a thread is and is used to tie the tension element during the casting ties concrete and thus the subsequently explained tendon hold su in the appropriate position *

On the concrete-side surface of the second formwork body 3 is supported by a spacing sleeve 18. This spacer sleeve is only required when the distance between the clamping device and the formwork assembly is too large for an immediate Touch is. The spacer sleeve 18 is in a recess 19 out in the second formwork body. Adjacent to the spacer sleeve 18, or optionally to the second formwork body 3, is the tension remaining in the concrete

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anchor 12, the one with your extended end area or the trumpet the clamping sleeve 21 of the clamping device is firmly connected.

Inside the trumpet and the clamping sleeve is the tendon, which is represented in the Pail by a number of Single wires 22 is formed. These individual seams 22 are inserted into a nut or a clamping head 23, for example wedged, which has an internal thread and an external thread. The internal thread serves to accommodate the tension element 7 and thus to Holding the clamping head 23 while the concrete is being poured and for pulling the clamping head 23 out beyond the clamping anchor 12. In this position, the clamping head 23 can then be opposite by a nut or washer, not shown, screwed on on the outside the tension anchor 12 are anchored and tensioned.

Pig. 6 shows a section through the formwork body arrangement according to FIG two further embodiments of the invention. In this case a first formwork body 24 rests against the formwork wall 1, which is formed by a spherical section or a cylinder section, in particular a hemisphere or a half cylinder can be formed. The sliding surface facing away from the formwork wall 1 26 of the first formwork body 24 is the correspondingly designed Sliding surface 27 of the second formwork body 25 opposite. The sliding surfaces 26, 27 are respectively spherical or formed cylindrically. In the palle of a cylinder section-shaped first sliding body 24 is the formwork wall 1 facing surface is provided as a sliding surface 28, while this at a spherical segment-shaped shape of the first formwork body is not necessary, as the second formwork body can be swiveled in all directions in this palle

The first formwork body 24 has a recess 29 which is funnel-shaped in the palle of a spherical first formwork body, in the case of a cylindrical first formwork body, it can be designed in the form of a slot. This creates a panning of the tension element, not shown in FIG. 6, in all required Directions allowed. The second formwork body 25 in turn has a surface 30 concentric to the concrete side,

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cylindrical recess 31 for the implementation of the tension element on. Furthermore, the tensioning anchor 12 is shown schematically in this figure »

It is readily apparent that by mutual pivoting or any rotation between the formwork wall 1, the first formwork body 24 and the second formwork body 25 Direction for the axis of the tendon can be achieved. Otherwise, the same apply to the embodiment according to Pig. 1 to 5 plague positions hit

The embodiments according to FIG. 6 can also be modified in such a way that the convex sliding surface on part 25 and accordingly the concave sliding surface is attached to part 24.

After assembly, the first formwork body can be firmly connected to the formwork wall, for example nailed down.

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Claims (24)

Claims 1 · Formwork arrangement for the manufacture of one facing the end faces The end formwork surface of a prestressed concrete body which adapts the prestressed concrete reinforcements to the prestressed anchor, comprising a Formwork wall and a concrete side attached to the formwork wall, facing this and the end face of the tensioning anchor adjustable formwork assembly, characterized in, that the formwork assembly is formed by two formwork bodies the first (2, 24) in the assembled position with a flat sliding surface (4f 28) on the formwork wall (1) rests and on the opposite side has a sliding surface (5, 26) that is not parallel to the formwork wall (1), and its second (3, 25) with a sliding surface (6, 27) on the sliding surface (5, 26) cooperating with it one and with a flat surface (8, 30) not parallel to the sliding surface (5, 26) on that of the first formwork body facing away from the concrete side, the first formwork body (2, 24) - at least during the assembly process - .. gangways - rotatable with respect to the formwork wall (1) and the second formwork body (3, 25) - at least during the assembly process - According to the shape of the adjacent sliding surfaces (5, 6; 26, 27) of the formwork body (2, 3 »24, 25) is displaceable or rotatable relative to the first formwork body (2, 24), 2. Formwork arrangement according to claim 1, characterized in that that the formwork body (2, 3; 24, 25) is penetrated by a tension element (7) which at the same time penetrates the formwork wall (1) will. 3. Formwork arrangement according to claim 2, characterized in that on the air side of the formwork wall (1) two also rom Tension element (7) penetrated, in the Porm and arrangement the Formwork bodies (2, 3; 24, 25) essentially corresponding auxiliary bodies (H, 15) are provided. 509808/0490 4. Formwork arrangement according to claim 3 »characterized in that the auxiliary bodies (14, 15) are smaller than the formwork bodies (2, 3; 24 _f 25). 5. Formwork arrangement according to one of the preceding claims, characterized in that the formwork arrangement is designed to be tapered from the formwork wall (1) that the formwork body (2, 3; 24, 25) from can be pulled out of the attached concrete, 6. Sohalungsnordnung according to one of claims 2 to 5, characterized in that the tension element (7) the formwork body (2, 3; 24, 25) and optionally the auxiliary body (13, 14) in recesses (9, 10; 29, 31) passes, are formed such ä & B they allow any twisting or pivoting of the shuttering body and the auxiliary body with one another or of the shuttering body and support body against the shuttering wall (1). 7. Formwork arrangement according to one of claims 2 to 6, d a characterized in that the arrangement consists of Formwork bodies (2, 3; 24, 25) and optionally auxiliary bodies (13, 14) against the formwork wall (1) using the The tension element can be clamped 8. Formwork arrangement according to one of the preceding claims, characterized in that the Formwork wall (1) facing away from sliding surface (5) of the first formwork body (2) at an acute angle to the plane of the Formwork wall lying plane and that the adjacent sliding surface (6) and the concrete-side surface (8) of the second Formwork body (3) lie in planes that are placed one on top of the other at the same acute angle. 9. Formwork arrangement according to claim 8, characterized in that that the formwork body (2, 3) is formed by oblique truncated cones that are widened towards the formwork wall will. 509808/0490 10. Formwork arrangement according to claim 6, 8 or 9, characterized marked that the first formwork body (2) one concentric and perpendicular to the sliding surface (5) _ _ _Qder.frustoconfförmise ^ x _Λ , running cylindrical / recess XIO), and that the second formwork body (3) has a concentric and perpendicular to the concrete side surface (8) running, in diameter slightly above that of the suction element (7) Has a cylindrical recess. 11. Sohal arrangement according to one of claims 8 to 10, characterized in that the second formwork body (3) on the first formwork body (2) facing sliding surface (6) engages in the recess (10) of the first formwork body (2) as a guide has serving annular projection (11). ' the 12. Sohalungsanordnung according to one / claims 1 to 7, characterized marked that the first Bracket body (24) formed by a spherical section resting with the flat surface against the formwork wall (1) is and that the against the spherical sliding surface (26) abutting the second formwork body (25) on the first formwork body side facing a correspondingly designed as a spherical segment-shaped recess sliding surface (27). 13 · Bracket arrangement according to claim 12 »characterized in that the second formwork body (25) is designed as a truncated cone with a flat surface on the concrete side. 14 · Sohaling arrangement according to claim 12 or 13 »thereby characterized in that the first formwork body (24) is a concentric, concentric, tapering to the formwork wall (i) funnel-shaped recess (29) aufweisi lüe 509808 / 049C 15. Formwork arrangement according to claim 12 to 14, characterized characterized in that the second formwork body (25) one concentric and "perpendicular to the concrete side • Surface (30) outgoing cylindrical recess (31) on v / eist, whose diameter is slightly above that of the tension element (7). 16. Bracket arrangement according to one of claims 12 to 15, characterized in that the first Bracket body (24) is hemispherical. 17 · Sohaling arrangement according to one of claims 1 to 7, d a through characterized in that the first formwork body (24) by one with the flat surface against the Formwork wall (1) adjacent cylinder section is formed and that the against the cylindrical sliding surface (26) of the first formwork body adjacent second formwork body (25) has a corresponding sliding surface (27) designed as a cylindrical recess. 18. Formwork arrangement according to claim 17, characterized in that that the second formwork body (25) has an approximately trapezoidal cross-section, the long of which Page is formed by the circular arc of the sliding surface (27), with a flat surface (30) being provided on the concrete side is. 19 · Formwork arrangement according to one of claims 17 and 18, d a through characterized in that the first holder body (24) each recess is transverse to the cylinder axis running, to the formwork wall (1) converging base seat. 20. Sohalungsanordnung according to one of claims 17 to 19, el a through characterized in that the second formwork body (25) is concentric and perpendicular to the Concrete-side surface (31) outgoing, cylindrical recess (31), the diameter of which is slightly larger than the dos 509808/0490 Tension elements (7) lies. 21. Formwork arrangement according to one of claims 17 to 20, characterized in that the first formwork body (24) is a half cylinder. 22. Formwork arrangement according to one of the preceding claims, characterized in that for support of the second formwork unit (3 or * 25) against an in Concrete remaining connected to the adapter sleeve (20) Clamping anchor (12) a spacer sleeve (18) is provided, which extends in the area of the circumference of the clamping anchor (12) against this supports. 23. Sling arrangement according to claim 22, characterized in that the second formwork body rejects (25) a recess for receiving and guiding the spacer sleeve (18). 24. Formwork arrangement according to one of the preceding claims, characterized in that the Sohalungskörper consist of destructible material such as rigid foam. 509808 / 049Q