WO2009043748A1

WO2009043748A1 - Framework arrangement for the cantilever construction of bridges

Info

Publication number: WO2009043748A1
Application number: PCT/EP2008/062604
Authority: WO
Inventors: Johann Peneder
Original assignee: Doka Industrie Gmbh
Priority date: 2007-10-04
Filing date: 2008-09-22
Publication date: 2009-04-09
Also published as: DE102007047439A1

Abstract

The invention relates to a framework arrangement for the cantilever construction of bridges, having at least one carrier (20) that is configured as a closed, case-shaped hollow profile.

Description

Schalunqsanordnunq for the cantilever construction of bridges

Technical area

The invention relates to a formwork arrangement for the cantilever construction of bridges.

In cantilevered concrete bridges, those formworks between which the necessary reinforcements are inserted and the concrete forming the next section shall be poured over the already established and sufficiently hardened section of the bridge. For this purpose, essentially carriers or rails are mounted at the end of the bridge section already created, in which an upper support assembly is movably mounted. The upper carrier arrangement can protrude in the free-living direction and / or over the lateral edge of the already created bridge section. Formwork for the upper area of the bridge may be attached to portions of the upper beam assembly. Further, a lower support assembly may be suspended from the upper support assembly, which are provided for optionally displaceable storage of other formwork for lower portions of the bridge and / or inner formwork in the case of a hollow box profile of the bridge. The storage of all movable elements usually takes place by means of rollers. After a new building section has been created, the formwork arrangement can be advanced to establish the reinforcements for the next section. In this context, the rails or beams on which the formwork arrangement is mounted, can be extended to the last created building section. State of the art

A formwork arrangement for the cantilever construction of bridges, are provided in the roller bearings and a formwork is independent of an outer formwork movable, is known from WO 83/04274.

DE 28 48 536 A1 relates to a similar arrangement in which sliding bearings can be provided. Further formwork arrangements from this area are evident from EP 0 004 251 A1, DE 26 60 087 B1 and US Pat. No. 3,989,218.

Presentation of the invention

The invention has for its object to provide a formwork arrangement for the cantilever construction of bridges, which is improved in terms of the cost of the individual components of such an arrangement.

The solution of this object is achieved by the formwork arrangement according to the patent claim 1.

Consequently, the formwork arrangement according to the invention for the cantilever construction of bridges has at least one support, which is designed as a closed, box-like hollow profile. By such a design, significantly lower tolerances can be realized than is the case with the previously used rolled sections. The described carrier can be designed, for example, as a welded construction and composed of different sections. As a result, the materials and wall thicknesses of the individual sections can be adapted to those requirements that are placed on the respective section in an advantageous manner. This applies equally to machinability. In particular, at first It has been found that the design according to the invention makes it possible to realize a higher load capacity with respect to bending and / or torsion, compared to the profiles of the same weight used hitherto. Accordingly, weight and material can be saved at a given load capacity, which makes both the respective carrier cheaper to produce, as well as, in view of the considerable total weight of the formwork arrangement overall, in a positive way allows savings in other bearing parts. Furthermore, by the design of a carrier as a hollow box profile introduced standard components, which are known, for example, as Mietteile find use. Finally, it has been found that the use of at least one closed, box-like hollow profile enables asymmetric force introduction.

Preferred developments of the arrangement according to the invention are described in the further claims.

As mentioned, it has proved to be advantageous to assemble the hollow profile carrier from a plurality of sections in order to be able to adapt individual sections in a particularly efficient manner to the respective requirements imposed thereon.

This is reflected, for example, in that preferred development in which at least two sections of the hollow profile carrier differ with regard to their material and / or their thickness.

Although the use of hollow profile beams is intended at numerous points of the Schalungεanordnung and leads to the advantages described, is currently preferred to use at least one hollow profile support such that it extends substantially perpendicular to the Freivorbaurichtung, in other words transversely thereto and largely horizontally , For carriers with this orientation, the advantages according to the invention could be realized particularly extensively. With regard to the compatibility with other components of the formwork arrangement has also been found to be advantageous if the hollow-profile carrier has at least one flange. Furthermore, one or more such flanges can be particularly easily realized, especially in a welded construction and allow in the form of butt welding the use of particularly simple welding process.

With regard to the connection of further components to the hollow-section carrier according to the invention, it is further preferred at present for at least one flange to extend largely horizontally in a use position.

From the same point of view, in the case of the formwork arrangement according to the invention, at least one hollow-section carrier has at least one grid of fastening devices, for example fastening openings. These may, for example, be provided on one or more flanges and / or on one or more sections which (as seen in cross-section) form the closed part of the hollow profile. By one or more such grid of fasteners, the connection of other components is possible at many different locations. As a result, the formwork arrangement according to the invention is versatile and can be adapted to a variety of bridge geometries. Furthermore, it is possible by the extensive connectivity options of components that surround the hollow-section beam according to the invention allows to carry out asymmetric structures to connect a bridge or other cantilever construction to existing buildings and drive past obstacles in cantilever construction. The numerous and provided in a grid fastening devices also allow a great deal of flexibility in terms of static design of the formwork arrangement itself up to an asymmetric force introduction. The described grid of Fastening devices allow the use of numerous standard components and their attachment in many different places. In particular, end regions of the hollow-profile carrier according to the invention can remain unused and protrude from the formwork arrangement. Due to the weight reduction mentioned above, this leads to no significant disadvantages. To the feature discussed above, namely at least one grid of fasteners on a cantilever beam formwork support, in particular bridges, it should be noted that this aspect, including any particular or hereafter described particular features, is an innovation basically of design at least one carrier is independent as a closed, box-like hollow profile. In other words, a formwork arrangement for cantilever construction, in particular of bridges, with at least one support, which has at least one grid of fastening devices, to be regarded as the subject of the application, which can be combined with all the above and following features in an advantageous manner.

For the grid of fasteners, it has proven to be advantageous to provide thereof at least two, which differ in terms of the distances between individual fasteners and / or the sizes of the fasteners of the respective grid. In other words, a grid of fastening devices with a first spacing and / or a first size of fastening devices can be provided on a first section of the hollow profile carrier according to the invention, and a second or further grid is located on one or more other sections of the hollow profile carrier fastening devices with a second, different distance between the fastening devices and / or a second, different size of fasteners. In this way, the possibility can be created in different areas of the hollow profile carrier advantageously to attach different components and / or components with a different screening.

Brief description of the drawings

The invention will be explained in more detail with reference to exemplary embodiments shown in the drawings.

Show it:

Fig. 1 is a perspective view of a formwork arrangement according to the invention;

FIG. 2 is a perspective view of a hollow section beam in the formwork arrangement of FIG. 1; FIG.

3 is a bottom perspective view of a slide bearing in the formwork arrangement of FIG. 1 ; and

4 shows a perspective, partially cutaway view of a detail from FIG. 1.

Detailed description of preferred embodiments of the invention

As can be seen in FIG. 1, the shuttering arrangement 10 according to the invention, which in the cantilevered direction can have an extension of a few meters, for example of five meters, is supported on an already created section 30 of a bridge. The already created bridge section 30 can cantilever freely, and the formwork arrangement 10 can be provided to create a further, in turn projecting Teilεtück. To support the formwork arrangement 10 are on the already bridge section 30 mounted in the case shown four carriers 32, which serve essentially the storage and support of the formwork arrangement 10. The carriers 32 essentially act as rails on which the formwork arrangement 10, as described in more detail below, is displaceably mounted. In Fig. 1, a state is shown in which the formwork assembly 10, of which any formwork is not shown, has been advanced out of the last created section and is located in the situation shown immediately before the last created section.

The support of the formwork arrangement 10 on the supports 32 in the case shown by sliding bearings 34, which cooperate substantially with the upper surfaces of the support 32. The forward movement is accomplished in the case shown by two hydraulic cylinders 36 which oscillate and alternately, supporting themselves on supports 38, advance the formwork assembly 10 or, while the formwork assembly 10 remains stationary, the supports 38 tighten. In addition to the described plain bearings 34, abutments 40 are provided, which can engage, for example, protruding flanges of the supports 32 in order to support the weight of the overhanging formwork arrangement. Furthermore, anchor rods may be provided for this purpose.

Generally speaking, the formwork arrangement comprises an upper support arrangement 12, which consists of transverse 20 and longitudinal members 42. About a plurality of rods 16 is suspended from the upper support assembly 12, a lower support assembly 14, which also has transverse 20 and longitudinal members 42. Standardized stages may be attached to the upper 12 and / or lower carrier assembly 14, inter alia because of the possibilities for attaching standard components described below. In the example shown, all cross members 20 are designed as hollow-profile carriers, as described below with reference to FIG. 2 explained in more detail. In addition, it can be seen in FIG. 1 that stabilization of the carrier arrangement can take place between the carriers 20, in particular in the case of the upper carrier arrangement 12, by additional, for example diagonally oriented struts 44. Further, diagonally downwardly extending supports 46 may be provided to form the upper formwork assembly 12 with truss-like sections. It also follows that the upper support assembly, substantially in the form of the cross member 20, in the vertical direction from the surface of the bridge portion 30 is spaced so that the space located under the upper support assembly advantageously for the required work, such as the introduction of Reinforcements, is kept free. The space available for this purpose is further increased by the fact that the mentioned diagonal struts 44 are arranged in comparatively outer regions, so that the intermediate inner region can be used in a favorable manner for the delivery of reinforcement and the like. The suspension of the lower support assembly 14 is carried out in the example shown by a plurality of rods 16, in which the lower support assembly 14 is mounted in a special manner, which will be described in more detail below.

Referring first to Fig. 2, the construction of the respective cross members 20 of the formwork arrangement of Fig. 1 will be described in detail. As can be seen in Fig. 2, the respective carrier 20, seen in cross-section, as seen at the front end (Fig. 2), a closed, box-like cross-section. This is formed in the example shown by different sections, in the case shown by two largely horizontally oriented sections 22.1 and two in the representation largely vertically oriented web sections 22.2. Characterized in that the horizontal portions 22.1 have a greater width than the web portions 22.2 are spaced from each other, arise at the lateral edges of the carrier 20th projecting flanges 24. Referring to FIG. 2 it can be seen schematically that the horizontal sections 22.1 are slightly thicker than the web sections 22.2. This indicates that these sections may be provided with different thicknesses and / or different materials in accordance with the different requirements imposed thereon. 2, ie in the rear region (as shown in FIG. 2) of the carrier 20, an end plate 48 can be seen, which in the example shown protrudes in all directions over the sections 22 of the carrier 20. It should be noted that that the carrier 20 may also have at its other end, ie the front end of Fig. 2 such an end plate 48, which is omitted for the sake of illustrating the interior of the carrier 20 in Fig. 2. At the end plate 48 are numerous fastening means in Detect shape of mounting holes 50, by means of which the attachment of surrounding components is possible.

This similarly applies to the grid of fasteners in the form of apertures 26 extending substantially the entire length of the support 20 and in the longitudinal direction thereof. In the case shown, a comparatively narrow grid of fastening devices in the form of openings 26.1 is provided on all laterally projecting flanges 24 of the carrier 20. The individual openings of this grid, for example, have a distance of about 10 cm and the attachment of "truss components" as the diagonal supports 44 and / or the diagonal supports 46 are used. In the embodiment shown, the fastening means 26.2 of a second grid located in the area of the closed box-like area (seen in cross-section) have a greater spacing and a larger diameter of the openings. The distance may be, for example, 20 cm and the implementation of rods 16 (see, Fig. 1) for the suspension of the lower Carrier assembly 14 serve. As FIG. 2 shows, the profile of the carrier 20 can be described as an I-profile with a double center bar, so that a hollow profile closed in the region of the middle X-web (seen in cross-section) is formed. The horizontal sections 22.1 and the web sections 22.2 of the carrier 20 and the end plates 48 may be welded together, for example. By way of example, the carrier shown in Fig. 2 may have a height dimension (in the direction of the web portions 22.2) of about 40 cm.

In Fig. 3, a drive unit is shown, which has a sliding bearing 34, a hydraulic cylinder 36 and a support 38 substantially. The operation of the drive unit has been explained above with reference to FIG. 1. From Fig. 3 can be additionally seen that the sliding bearing 34 in the Ausführungsbei shown game two runners 52 which are slidably provided on the upper sides of the mounted on the completed bridge section 30 carrier 32. The runners 52 have lateral boundaries 54 largely in the form of plates and plastic bearing parts 28. The plastic bearing parts 28 may be matched to the other bearing part, in the case shown the carrier 32, such that the storage is self-locking up to a certain slope. Furthermore, the plastic bearing parts can be interchangeable and / or magnetically attached to the runners 52. Furthermore, in the drive unit shown in Fig. 3, a substantially longitudinal direction, i. provided in the free-trimming direction axis 56, on which the upper support assembly may be rotatably mounted about a substantially horizontal axis.

FIG. 4 shows a detail of the hinged suspension of the lower carrier arrangement 14 on the upper carrier arrangement 12 (see FIG. 1), which can be seen in an overall view in FIG. Of the lower support assembly is in Fig. 4, a longitudinal member 42 and an adjoining housing 18 can be seen. As explained above, the housing is on attached to a cross member 20. The articulated suspension is carried out in detail on a rod 16, at its lower end, which may have a thread for this purpose, for example by means of a nut 58, a spherical cap 60 is attached. The spherical cap 60 has a spherical surface and cooperates in the embodiment shown with a ring-like cut counterpart 62 with a spherical inner surface 64. It can be seen that the cutout of the counterpart 62 is larger than the diameter of the rod 16, so that an inclination of the lower support assembly, to which the housing 18 shown in Fig. 4 is attached, around all axes is possible. As a result, as mentioned above, the carrier arrangement can be adapted in a particularly flexible manner to inclined bridge geometries and other special applications.

Claims

claims

1. formwork arrangement (10} for the cantilever construction of bridges with at least one support (20), which is designed as a closed, box-like hollow profile.

2. The formwork arrangement according to claim 1, characterized in that the hollow profile carrier (20) is composed of a plurality of sections (22).

3. The formwork arrangement according to claim 2, characterized in that at least two sections (22) differ with regard to their material and / or their thickness.

4. Formwork arrangement according to one of the preceding claims, characterized in that there is at least one hollow-profile carrier (20) extending substantially perpendicular to the free-living direction.

5. Formwork arrangement according to one of the preceding claims, characterized in that there is at least one hollow-profile carrier (20) at least one flange (24).

6. Schalungsanordπung according to claim 5, characterized g e k e n e z e i c h e s that at least one flange (24) extends substantially horizontally in a position of use.

7. Formwork arrangement according to one of the preceding claims, characterized in that at least one hollow-profile carrier (20) has at least one grid of fastening devices (26).

a. Formwork arrangement according to claim 7, characterized in that at least two rasters of fastening devices (26) are formed with different distances between individual fastening devices (26) and / or different sizes of fastening devices (26) of the respective grid.