DE102008055523B3 - Bolt system for forming form-fit connection between two ferroconcrete prefabricated members, has ferroconcrete prefabricated member including bolt and sleeve with cover and base that are provided for position fixing of bolt - Google Patents

Abstract

The system has a ferroconcrete prefabricated member (13) including a bolt (24) and a sleeve (29) mounted concentric to the bolt. Another ferroconcrete prefabricated member (17) has a duct (22) for receiving the sleeve and the bolt. The sleeve has a position fixing unit for position fixing of the bolt. The sleeve has a cover and a base that are provided for position fixing of the bolt. The sleeve and the bolt are located inside the duct after mounting of the prefabricated members. Hollow space between the duct and the sleeve are filled with grout (26).

Description

Technical area

The The invention relates to a mandrel system for reinforced concrete precast construction.

State of the art

Expansion Joints in a concrete part are intentionally made joints that serve larger concrete surfaces too interrupt the risk of cracking due to shrinkage, expansion, Put or other changes to avoid. Two concrete parts running in the same plane, which are separated from each other by a joint, are often with lateral force thorns equipped as connection and pressure distribution elements. Shear dowels prevent for a drop in a concrete part relative to the adjacent concrete part and take to the other by their moving Dorne length expansions the concrete parts.

Querkraftdorne are known from the prior art, which allow relative movements of building parts in only one direction, but also mandrels, which allow a relative movement in two directions. At the in 1 The first case shown anchored in a first part of the building, usually cylindrical shear force dowels 1 from a concentric, anchored in the second part of the building cylindrical sleeve 2 added. With the reference number 4 Holes are called, which serve the attachment of the sleeve to the formwork by nails or screws. The thorn 1 can only along the longitudinal axis of the cylindrical sleeve 2 move, whereby movements in only one direction (a-direction) are possible.

If movements in two directions are to be allowed, then the cylindrical mandrel becomes 1 as in 2 represented for example by a rectangular sleeve 3 taken, the expansion of the sleeve 3 in c-direction substantially the diameter of the mandrel 1 equivalent. In this case, the thorn 1 on the one hand in the direction of its longitudinal axis (a-direction) penetrate into the sleeve, but it is also horizontal movements of the mandrel perpendicular to its longitudinal axis (b-direction) possible.

When Disadvantage of these known connections with shear force thorns for a common that in the trade only predetermined default lengths of 16 cm to 20 cm sleeve length are available and second, that at least the subsequent construction in in-situ concrete be executed got to. In industrial and commercial construction is the use of in-situ concrete in big Heights of the building but associated with a high time and cost.

In the field of prefabricated reinforced concrete construction, therefore, the so-called "Auflagerung the movable prefabricated construction on the non-movable prefabricated construction with a fork" is used, which with reference to the 3 and 4 briefly explained. 3 shows a vertical section through a built in prefabricated construction part of the building. 4 shows the same part of the building in a horizontal section.

In the precast unit 11 become cladding tubes during production 12 and into the precast catcher 13 Dome 14 built-in. Next to it is the precast catcher 13 a fork 15 formed. After assembly of the beam 11 the cavity becomes between mandrel 14 and cladding 12 with grout 16 filled. After hardening of the grouting mortar 16 is the sub 11 with the interceptor 13 through the dome 14 positively connected. Then a second precast unit 17 on the interceptor 13 between the fork 15 hung up and tilting bearings 18 between fork 15 and beam 17 plugged in. On the precast unit 11 and the precast unit 17 is the as a trapezoidal sheet 10 arranged ceiling. In the final state, the beam can 17 Although moving in the X direction, but not in the Y direction.

The formation of such a connection using scavenger carriers 13 with molded fork 15 is time consuming and associated with high costs.

From the DE 102 49 742 A1 For example, a method and a device for dimensionally accurate erection of a building are known. Wall elements are provided on the foot with holes that are arranged in a predetermined spacing grid. In the bottom of the concrete foundation holes are placed on the floor plans of the building according to the spacing grid, in which rods are inserted and fixed. Portions of the bars project upwards over the sole and the wall elements are placed from above onto the bottom of the concrete foundation, in that the free bar sections engage in corresponding bores of the wall elements. The device of DE 102 49 742 A1 has mounting sleeves which are mounted on the rods. The wall element also has a cladding tube for receiving sleeve and rod, whereby the position of the rod relative to the wall element is fixed.

It There is still a need for connections of a precast reinforced concrete part to other components that are inexpensive and are to be trained with little time.

Presentation of the invention

Here implements the invention. It's supposed to be a connection of a precast reinforced concrete part to another component available be made, the cost-effective and is to be trained with little time. This task will according to the invention the mandrel system according to independent claim 1 solved. Further advantageous aspects, details and embodiments of the invention arise from the dependent ones claims, the description as well as the drawings.

The The present invention provides a mandrel system for forming a frictional Connection between a prefabricated reinforced concrete component and a second Component available. The second component is with a mandrel and a substantially equipped concentrically on the mandrel mounted sleeve. The reinforced concrete prefabricated part has a cladding tube to Recording of sleeve and thorn up, with the sleeve a device for fixing the position of the mandrel comprises. According to the invention it is in the device for fixing the position of the mandrel either a lid or a foot or but around a lid and a foot.

According to the invention known from the prior art, integrally formed on a component fork replaced by a mandrel system consisting of cladding tube, sleeve and mandrel. The spine system creates a connection between a reinforced concrete precast component and another component, wherein between the two components an expansion joint can be arranged. After installation of prefabricated reinforced concrete component and the second component are sleeve and mandrel inside the Cladding tube. The mandrel system is easy and inexpensive to assemble as well universally applicable. The cladding tube and the sleeve are produced cost-saving in running meters and on site the needed construction height tailored.

According to the invention the sleeve a device for fixing the position of the mandrel, namely either a lid or a foot or but a lid and a foot. Such a device brings a fixation of the position of the mandrel during the Assembly of the components with it, creating an exact concentric Alignment of sleeve and thorn allows becomes. The fixation of the spine system does not take place as from Known art by nailing or screwing the sleeve to the Formwork, but by the with a device for fixing the position of the spine equipped sleeve even.

Prefers If the second component is a second reinforced concrete prefabricated component. The mandrel system according to the invention Although preferred for the connection of two reinforced concrete prefabricated components used, but also in other connections use such. B. at Auflagerung a precast wall on a foundation.

To the installation of prefabricated reinforced concrete component and second component are located sleeve and thorn inside the cladding tube. The resulting cavity between cladding tube and sleeve is preferred with grout filled. By filling with grout becomes the sleeve inside the cladding tube fixed.

Prefers are for fixing the position of the mandrel on the inner surface of the Sleeve surveys as nubs or grooves provided. The mandrel is clamped through the elevations held exactly in its predetermined position.

According to one preferred embodiment it is an oblong cuboid Sleeve with substantially parallel to each other front and rear walls and substantially parallel side walls, wherein the side walls a smaller area have as front and back wall. In a section perpendicular to its longitudinal axis, the sleeve has a rectangular Shape.

Of the rectangular cross-section of the sleeve allows advantageously, a movement of the mandrel in a direction perpendicular to the longitudinal axis of Sleeve.

Prefers is the sleeve for fixing the position of the mandrel in three, essentially in the direction the longitudinal axis the sleeve subdivided extending chambers, the middle chamber for receiving of the mandrel is provided. The subdivision of the sleeve in substantially parallel mutually running chambers makes a reasonably priced, simple and yet safe remedy for an exact fixation of the mandrel relative to the sleeve during assembly of the components represents.

The provided as a device for fixing position lid and / or foot can formed the sleeve be. Lid and / or foot and Sleeve can but also be designed as separate parts.

Prefers are for fixing the position of the mandrel on the inner surface of the mandrel Lids and / or the foot Elevations such as knobs or grooves provided.

Alternatively or additionally, the cover for fixing the position of the mandrel is divided into three, extending substantially in the direction of the longitudinal axis of the sleeve extending chambers, wherein the central chamber is provided for receiving the mandrel. These embodiments represent a particularly inexpensive, simple and secure means for an exact fixation of the mandrel relative to the sleeve during assembly of the components. It proves to be particularly advantageous that a simple, known from the prior art sleeve can be used which does not have special devices or chambers for the Position fixation of the spine needs to have.

According to one another preferred embodiment is the foot to Positional fixation of the mandrel in three, essentially in the direction the longitudinal axis the sleeve subdivided extending chambers, the middle chamber for receiving of the mandrel is provided. These embodiments are particular low-cost, simple and safe means for an exact fixation of the mandrel relative to the sleeve during assembly of the components dar. It proves to be particularly advantageous that a simple, from sleeve known in the art It can be used without any special devices or chambers for the Position fixation of the spine needs to have.

A particularly exact fixation of the position of the mandrel is achieved when both the lid and the base of the sleeve with the devices described are equipped.

Especially Preferably, the device for fixing the position of the mandrel is designed to that they are caused by relative movements occurring after assembly the reinforced concrete prefabricated component and the second component is destroyed. By the destruction the device for fixing the position of the mandrel, the mandrel and so that the prefabricated reinforced concrete component then essentially unhindered in a horizontal direction on a length, that of the inner width the sleeve corresponds, move.

Brief description of the drawings

The Invention is intended below with reference to embodiments in connection closer with the drawings explained become. All Figures show the invention only schematically and with their essential components. The same reference numerals correspond Elements of equal or comparable function. Show it

1 a cylindrical mandrel with a cylindrical sleeve (prior art);

2 a cylindrical mandrel with a rectangular sleeve (prior art);

3 a vertical section through a built-in prefabricated building part (prior art);

4 shows the part of the building according to 3 in a horizontal section;

5 a vertical section through a prefabricated building part of the building according to the present invention;

6 according to the building part 5 in a horizontal section;

7A a section through a sleeve with three chambers;

7B the sleeve according to 7A in a section perpendicular to the cutting plane of 7A ;

7C an alternative embodiment of the sleeve in a section perpendicular to the cutting plane of 7A ;

8A a section through a sleeve, through the lid of the sleeve and through the foot of the sleeve;

8B the cover of the sleeve or the foot of the sleeve according to 8A in a section perpendicular to the cutting plane of 8A ,

Ways to execute the invention

5 shows a vertical section through a built in prefabricated construction part of the building. 6 shows the same part of the building in a horizontal section.

Like from the 5 and 6 can be seen in the reinforced concrete prefabricated substructure 11 in production in the factory sheaths 12 and in the precast reinforced concrete support beam 13 Dome 14 built-in. After assembly of the beam 11 the cavity becomes between mandrel 14 and cladding 12 with grout 16 filled. After hardening of the grouting mortar 16 is the sub 11 with the interceptor 13 through the dome 14 positively connected.

In the reinforced concrete precast engine 17 become cladding tubes during production 22 accurately embedded in concrete. On the the reinforced concrete precast engine 17 facing side of the reinforced concrete precast catcher 13 become smooth, rust-free domes during production 24 accurately embedded in concrete. At the construction site will be on the dome 24 the pods 29 reared. By the on the inner surface of the sleeve 29 provided device for fixing the position of the mandrel 24 the mandrel is immovably adjusted in the sleeve.

After assembly of the beam 17 becomes the sleeve 29 on the spine 24 initially with simple tools such. B. wedges between cladding tube 22 and sleeve 29 in their position relative to the cladding tube 22 ge hold. Subsequently, the cavity between the ducts 22 and the pods 29 with grout 26 filled. After hardening of the grouting mortar 26 is the sub 17 with the interceptor 13 through the dome 24 connected.

The beam 17 can now be in the X direction on a length equal to the inner width of the sleeve 29 corresponds, move. A movement in the Y direction is excluded. On the reinforced concrete precast engine 11 and the precast reinforced concrete base 17 is the as a trapezoidal sheet 10 arranged ceiling.

7A shows an elongated cuboid sleeve 29 with mutually parallel front and rear walls and mutually parallel side surfaces, wherein the side surfaces have a smaller extent than the front and rear walls. Usually, the distance between the front and rear wall of the cuboid sleeve is chosen so that it is about 1 mm above the diameter of the mandrel. Shown is a section containing the longitudinal axis of the sleeve, wherein the cutting plane is parallel to the front and rear walls. 7B shows in enlarged scale the same sleeve 29 in a section perpendicular to the longitudinal axis of the sleeve.

From the 7A and 7B it can be seen that the sleeve 29 is divided into three substantially in the direction of the longitudinal axis of the sleeve extending chambers. Here is the chamber 40 for receiving the thorn 24 intended. Through the chamber 40 becomes a secure position of the thorn 24 reached during assembly of prefabricated reinforced concrete components. This is required because of the location of the spine 24 during the construction process may not change in either X or Y direction.

7C shows an enlarged view of an alternative embodiment of the sleeve in the in 7B illustrated section. Instead of in 7B shown chamber 40 are here to secure the position of the thorn 24 on the inner surface of the sleeve 29 the surveys 44 provided by the spine 24 is held in a press fit.

In relative movements of the building parts strong forces occur, which are the partitions, which the chamber 40 training, or the surveys 44 to destroy. The beam 17 can then be in the X direction on a length equal to the inner width of the sleeve 29 corresponds, move.

8A shows an elongated cuboid sleeve 43 with mutually parallel front and rear walls and mutually parallel side surfaces, wherein the side surfaces have a smaller extent than the front and rear walls. Shown is a section containing the longitudinal axis of the sleeve, wherein the cutting plane is parallel to the front and rear walls. In the same section are also the lid 41 the sleeve 29 and the foot 42 the sleeve 43 shown. 8B shows the lid 41 the sleeve 43 or the identically formed foot 42 the sleeve 43 in a section perpendicular to the cutting plane of 8A ,

From the 8A and 8B it can be seen that the sleeve 43 no chambers or other devices for fixing the position of the mandrel 24 during assembly. The position fixing is in this embodiment by the lid 41 the sleeve 43 and by the foot 42 the sleeve 43 accepted. The lid 41 and the foot 42 are divided into three each extending substantially in the direction of the longitudinal axis of the sleeve chambers. In each case, the chamber 40 for receiving the thorn 24 intended. At the construction site, the foot becomes 42 on the thorn 24 reared. Then the sleeve 43 on the foot 42 reared. Finally, the lid 41 in the sleeve 43 plugged in.

As already related to the 7A and 7B is explained by the chambers 40 a position securing the thorn 24 reached during assembly of prefabricated reinforced concrete components. This is required because of the location of the spine 24 during the construction process may not change in either X or Y direction.

In relative movements of the building parts strong forces occur, which are the partitions, which the chamber 40 train, destroy. The beam 17 can then be in the X direction on a length equal to the inner width of the sleeve 29 corresponds, move.

1

Shear Dowel

2

cylindrical Shear Dowel sleeve

3

rectangular Shear Dowel sleeve

4

drilling for the Attaching the shear force mandrel sleeve on the formwork

10

trapezoidal sheet

11

Fertigteilunterzug

12

Cladding tube for mandrel

13

Fertigteilabfangträger

14

mandrel

15

fork

16 26

grout

17

Fertigteilunterzug

18

rocker bearing

22

Cladding tube for sleeve with mandrel

24

stainless mandrel

29 43

shell

40

chamber

41

cover

42

foot

44

surveys

Claims (12)

Mandrel system for forming a frictional connection between a prefabricated reinforced concrete component ( 17 ) and a second component ( 13 ), the second component ( 13 ) with a thorn ( 24 ) and a substantially concentric on the mandrel ( 24 ) mounted sleeve ( 29 ) and the precast reinforced concrete component ( 17 ) a cladding tube ( 22 ) for receiving sleeve ( 29 ) and thorn ( 24 ), wherein the sleeve ( 29 ) a device for fixing the position of the spine ( 24 ), characterized in that the sleeve ( 29 ) for fixing the position of the spine ( 24 ) a lid ( 41 ), one foot ( 42 ) or a lid ( 41 ) and a foot ( 42 ) having. Spike system according to claim 1, characterized in that it is in the second component ( 13 ) around a second reinforced concrete precast element ( 13 ). Mandrel system according to at least one of claims 1 and 2, characterized in that after assembly of prefabricated reinforced concrete component ( 17 ) and second component ( 13 ) the sleeve ( 29 ) and the thorn ( 24 ) inside the cladding tube ( 22 ) and the cavity between cladding tube ( 22 ) and sleeve ( 29 ) with grout ( 26 ) is filled. Dorn system according to at least one of claims 1 to 3, characterized in that for fixing the position of the mandrel ( 24 ) on the inner surface of the sleeve ( 29 ) Surveys ( 44 ) are provided as knobs or grooves. Mandrel system according to at least one of claims 1 to 4, characterized in that the sleeve ( 29 ) has an elongated cuboidal profile. Spike system according to claim 5, characterized in that the sleeve ( 29 ) for fixing the position of the spine ( 24 ) in three, substantially in the direction of the longitudinal axis of the sleeve ( 29 ) extending chambers, wherein the middle chamber ( 40 ) for receiving the spine ( 24 ) is provided. Dorn system according to at least one of claims 1 to 6, characterized in that for fixing the position of the mandrel ( 24 ) on the inner surface of the lid ( 41 ) and / or the foot ( 42 ) Surveys ( 44 ) are provided as knobs or grooves. Spike system according to at least one of claims 1 to 7, characterized in that the lid ( 41 ) for fixing the position of the spine ( 24 ) in three, substantially in the direction of the longitudinal axis of the sleeve ( 29 ) extending chambers, wherein the middle chamber ( 40 ) for receiving the spine ( 24 ) is provided. Spike system according to at least one of claims 1 to 8, characterized in that the foot ( 42 ) for fixing the position of the spine ( 24 ) in three, substantially in the direction of the longitudinal axis of the sleeve ( 29 ) extending chambers, wherein the middle chamber ( 40 ) for receiving the spine ( 24 ) is provided. Spike system according to at least one of claims 1 to 9, characterized in that the lid ( 41 ) and / or the foot ( 42 ) to the sleeve ( 29 ) are formed. Spike system according to at least one of claims 1 to 9, characterized in that the lid ( 41 ) and / or the foot ( 42 ) and the sleeve ( 29 ) are formed as separate parts. Dorn system according to at least one of claims 1 to 11, characterized in that the device for fixing the position of the mandrel ( 24 ) is formed so that it by occurring after assembly relative movements between the reinforced concrete precast element ( 17 ) and the second component ( 13 ) gets destroyed.