GB1599341A

GB1599341A - Method and a device for mounting points in mounting areas

Info

Publication number: GB1599341A
Application number: GB1312178A
Authority: GB
Original assignee: Carl Schenck AG
Current assignee: Carl Schenck AG
Priority date: 1977-05-17
Filing date: 1978-04-04
Publication date: 1981-09-30
Also published as: FR2391417B1; FR2391417A1; JPS5839277B2; DE2722180C2; JPS53142285A; DE2722180A1

Description

(54) A METHOD AND A DEVICE FOR MOUNTING POINTS IN MOUNTING AREAS (71) We, CARL SCHENCK AG of Landwehrstrasse 55, Darmstadt 61, Federal Republic of Germany, a German body corporate; do hereby declare the invention for which we pray that a patent may be granted to us, and the method by which it is to be performed, to be particularly described in and by the following statement: The invention relates to a method and a device for mounting points in mounting areas in which each mounting point has a supporting plate for the components to be mounted, which is provided at its centre with an opening and has a tubular part (such as a tube, or collar) through which bracing elements pass, which is arranged substantially below the supporting plate in a cast mounting base and in which the supporting plate can be connected to the mounting base with the aid of a filler.

When testing components which can not be housed in testing machines or testing frames because of their large spatial dimensions, so-called testing structures or tensioning structures are used. These testing structures essentially comprise vertical pillars and supports (e.g. gantry supports), which are variously assembled according to the given test conditions (i.e. the dimensions of the test-piece, the type of loading, the loading device, the testing force, etc). The testing structures are set up with a raster system of holes on mounting areas, or foundations and are fixed with tensioning bolts or mounting bolts. The mounting areas can therefore have a magnitude of several hundred square metres.

The mounting areas serve to accommodate prefabricated testing structures in any desired arrangement for testing components. The prefabricated testing structures are only usable however if the mounting points in the mounting areas, foundations or tensioning plates fulfil defined requirements for accuracy. Since the structures consist of steel while the tensioning area mostly consists of concrete, special adjusting elements are necessary if the large variations in dimensions of the concrete construction (deformation due to contraction, creep, prestressing, etc.) are to be limited to the very small tolerances of the steel components of the mounting area.

The problems of manufacturing mounting areas in the type of construction used for concrete lie particularly in the large accuracy of positioning required of the mounting points because only at very small differences in the height position and only with a very small spacing tolerances of the individual mounting points can the testing structure be perfectly fixed at any desired point on the mounting area.

In order to achieve the desired narrow tolerances, the mounting points built into the mounting area can be subsequently processed so that predetermined deviations in the dimensions are maintained.

This method is complicated however and involves large costs. Furthermore it is known to incorporate the supporting plates of the mounting points after the raw foundation of the mounting base has been manufactured and to connect it to the mounting base via a filler. In this way alignment of the supporting plates in the mounting points is made easier; however the magnitude of the forces which can be transmitted, more particularly the horizontal forces which can be transmitted, is limited with these mounting points.

The present invention seeks to create a method of manufacturing mounting points in mounting areas or mounting bases which method combines the advantages of simple incorporation of the supporting plates with the possibility of transmitting large forces, more particularly in a horizontal direction.

According to a first aspect of the invention, there is provided a method of produc ing a plurality of mounting points in a mounting structure comprising casting a base element around tubular elements, one provided for each mounting point, and forming a recess within the base element around the top of each tubular element during the casting, seating a support plate of smaller dimensions than the recess in each recess, adjusting the support plates into a desired position and thereafter filling the spaces between the support plates and the walls of the recesses with a filler.

Each recess in the base element may be manufactured using a short tube section as the outside wall of the recess and a base member which are both cast in when manufacturing the base element, the inside walls of the recess being formed by the tubular element. Alternatively each recess in the base element may be formed by a cupshaped component which is cast in when manufacturing the base element and by the tubular element which passes through a central aperture in the bottom of the cupshaped component.

By this method, the support plate can easily be incorporated after manufacture of the mounting base and then aligned.

Furthermore a triple axis tensioning condition may be produced in the filler used for connecting the support plate to the mounting base if vertical forces, i.e. bracing forces, act on the mounting points. The triple axis tensioning condition results from the fact that crosswise expansion of the filler is prevented to a large extent. The triple axis tensioning condition may cause considerable increase in the strength of the material of the filler transmitting the mounting and testing forces. As a result, large horizontal forces can also be introduced into the mounting points.

According to a second aspect of the invention, there is provided a device when used in producing a mounting point comprising a tubular element for embedding in a cast base element provided at one end with a cup-shaped surround forming an annular recess for receiving a support plate of smaller dimensions than the recess and a filler.

The cup-shaped surround may have a central opening for the tubular element whereby the cup-shaped surround is arranged coaxially on the tubular element so that it forms an approximately annular space which is substantially enclosed on all sides, together with the upper end of the tubular element and the supporting plate, this space being filled with a filler.

The cup-shaped surround may comprise a circular bottom plate coaxially connected to the tubular element and an annular sleeve arranged around the periphery of the bottom plate and projecting on both sides beyond the bottom plate. Owing to the transmission of force on all sides on to the cup-shaped surround or on to the annular sleeve, the effective force introduction region into the concrete may be substantially increased with respect to the known constructions. Not only the end of the cupshaped surround more particularly the annular sleeve, but also the side of the cup-shaped surround or of the annular sleeve projecting beyond the bottom plate which is remote from the force direction may be involved in transmitting horizontal forces.

A triple axis tensioning condition in the filler may be produced by appropriate shaping of the underside of the supporting plate.

It is advisable if the underside of the supporting plate is designed so that it has the shape of a truncated hollow cone.

Alternatively the underside of the supporting plate may have conical recesses.

According to a third aspect of the invention, there is provided a mounting comprising a cast base element, a tubular element embedded in the cast base element and having a cup-shaped annular element therearound forming a recess in the base element, a support plate of smaller dimensions than the recess received in the recess and a filler in the recess for securing the support plate to the walls of the recess.

The invention will now be described in greater detail by way of example, with reference to the drawings, in which: Figure 1 shows a mounting point of a mounting base manufactured according to the method in accordance with the invention having a supporting plate which has the shape of a truncated hollow cone on its underside, in plan view (Figure la) and in section (Figure lib), and Figure 2 shows a device for manufacturing mounting points in mounting areas having a supporting plate which has conical recesses on its underside and having a pot-shaped component arranged on a tube and formed of a bottom plate and an annular sleeve, in plan view (Figure 2a) and in section (Figure 2b).

The mounting point of a mounting base shown in Figures la and ib essentially comprises a supporting plate 1, a filler 2, which provides connection between the supporting plate 1 and the mounting base 3, and a tube 4 through which bracing elements pass. The lower end of the tube 4 can have a plate 5 on which the end members of tensioning elements (not shown) abut, for example tensioning bolts.

The mounting base 3, whose outline dimensions form the actual mounting area, can be constructed in different ways which are not shown here, for example as a plate, as a plate on uprights, as a box-type construction etc. and can be connected to the foundation of the building accordingly.

The thickness of the plate can for example amount to a metre. The mounting base can for example be constructed of steel reinforced concrete. prestressed concrete or other suitable compound material. A mounting base can have several hundred mounting points (raster points) for fixing testing structures.

When setting up the basic foundation, i.e.

the basic mounting base 3, the tube 4 is cast in with the plate 5. It is sufficient to align these components relatively roughly. A circular recess is provided in the raw foundation around the upper end of the tube 4.

The recess corresponds substantially to the space taken up by the filler 2 and the supporting plate 1. In order to produce the recess, any desired means known can be used, for example removable cores of hard foam. However, as indicated in broken lines in Figure lb, a tube section 9 or a cupshaped component 9, 10 can be cast-in when manufacturing the basic foundation. These components can be provided additionally with anchors 11.

After hardening of the mounting base 3, the supporting plates 1 are introduced into the recesses and aligned exactly. As a result, assembly devices can be used to maintain the desired raster spacings of the individual mounting points. In order to align the height position of the supporting plates, screws or bolts 6 can be used for example and these are screwed into threaded bores 7 in each supporting plate 1 and are supported on the base of the recess, the cup-shaped component 10 or the bottom plate 20 (Figure 2b).

After aligning the supporting plates the recesses are filled up below and around the plates with a suitable filler 2, for example cast resin. The mounting base 3 can be provided additionally with a layer 8 of flooring compound.

The device shown in Figures 2a and 2b for manufacturing mounting points has a supporting plate 1. a tube 4 with a lower end plate 5, a circular bottom plate 20 connected to the tube 4 and an annular sleeve 21 arranged at the periphery of the bottom plate. The annular sleeve 21 projects beyond the underside of the bottom plate 20 so that, after incorporating the device, a particularly good anchoring of the mounting point in the mounting base 3 is achieved.

The underside of the supporting plate 1 has conical recesses '3 and vents 24. The space between the supporting plate 1, the tube 4, the bottom plate 20 and the annular sleeve 21 is filled up after incorporating the device into the mounting base 3 with a filler 2. The shown position of the supporting plate 1 with respect to the remaining components 4, 20 21 corresponds approximately to the mounting position in the finished mounting base. The thickness of the mounting base 3 is indicated in Figure 2b in broken lines.

Another cup-shaped component for creating a recess around the upper end of the tube 4 can be used instead of the bottom plate 20 and the annular sleeve 21. The bottom plate 20 or a corresponding cupshaped component can also be arranged separately from tube 4 and be cast in the basic foundation (see parts 9 to 11 in Figure lib). The annular sleeve 21 and/or the bottom plate 20 can be provided additionally with anchors 26 if an even stronger anchoring of the mounting point is necessary.

The supporting plate 1 can be adjusted after the device is incorporated into the mounting base as described with reference to Figure 1 with the aid of adjusting screws 6 which are screwed into the threaded boreholes 7. The device for adjusting the supporting plate may however be constructed differently to the form shown with the adjusting screws provided, for example, on the bottom plate 20 in a manner not shown.

WHAT WE CLAIM IS: 1. A method of producing a plurality of mounting points in a mounting structure comprising casting a base element around tubular elements, one provided for each mounting point, and forming a recess within the base element around the top of each tubular element during the casting, seating a support plate of smaller dimensions than the recess in each recess, adjusting the support plates into a desired position and thereafter filling the spaces between the support plates and the walls of the recesses with a filler.

2. A method according to claim 1, wherein each recess in the base element is manufactured using a short tube section to form the outside wall of the recess and a base member which are both cast in when manufacturing the base element, the inside walls of the recess being formed by the tubular element.

3. A method according to claim 1, wherein each recess in the base element is formed by a cup-shaped component which is cast in when manufacturing the base element and by the tubular element which passes through a central aperture in the bottom of the cup-shaped component.

4. A device when used in producing a mounting point comprising a tubular element for embedding in a cast base element provided at one end with a cup-shaped surround forming an annular recess for receiving a support plate of smaller dimensions than the recess and a filler.

5. A device according to claim 4, wherein the cup-shaped surround has a central opening for the passage therethrough of the

**WARNING** end of DESC field may overlap start of CLMS **.

Claims

**WARNING** start of CLMS field may overlap end of DESC **. construction etc. and can be connected to the foundation of the building accordingly. The thickness of the plate can for example amount to a metre. The mounting base can for example be constructed of steel reinforced concrete. prestressed concrete or other suitable compound material. A mounting base can have several hundred mounting points (raster points) for fixing testing structures. When setting up the basic foundation, i.e. the basic mounting base 3, the tube 4 is cast in with the plate 5. It is sufficient to align these components relatively roughly. A circular recess is provided in the raw foundation around the upper end of the tube 4. The recess corresponds substantially to the space taken up by the filler 2 and the supporting plate 1. In order to produce the recess, any desired means known can be used, for example removable cores of hard foam. However, as indicated in broken lines in Figure lb, a tube section 9 or a cupshaped component 9, 10 can be cast-in when manufacturing the basic foundation. These components can be provided additionally with anchors 11. After hardening of the mounting base 3, the supporting plates 1 are introduced into the recesses and aligned exactly. As a result, assembly devices can be used to maintain the desired raster spacings of the individual mounting points. In order to align the height position of the supporting plates, screws or bolts 6 can be used for example and these are screwed into threaded bores 7 in each supporting plate 1 and are supported on the base of the recess, the cup-shaped component 10 or the bottom plate 20 (Figure 2b). After aligning the supporting plates the recesses are filled up below and around the plates with a suitable filler 2, for example cast resin. The mounting base 3 can be provided additionally with a layer 8 of flooring compound. The device shown in Figures 2a and 2b for manufacturing mounting points has a supporting plate 1. a tube 4 with a lower end plate 5, a circular bottom plate 20 connected to the tube 4 and an annular sleeve 21 arranged at the periphery of the bottom plate. The annular sleeve 21 projects beyond the underside of the bottom plate 20 so that, after incorporating the device, a particularly good anchoring of the mounting point in the mounting base 3 is achieved. The underside of the supporting plate 1 has conical recesses '3 and vents 24. The space between the supporting plate 1, the tube 4, the bottom plate 20 and the annular sleeve 21 is filled up after incorporating the device into the mounting base 3 with a filler 2. The shown position of the supporting plate 1 with respect to the remaining components 4, 20 21 corresponds approximately to the mounting position in the finished mounting base. The thickness of the mounting base 3 is indicated in Figure 2b in broken lines. Another cup-shaped component for creating a recess around the upper end of the tube 4 can be used instead of the bottom plate 20 and the annular sleeve 21. The bottom plate 20 or a corresponding cupshaped component can also be arranged separately from tube 4 and be cast in the basic foundation (see parts 9 to 11 in Figure lib). The annular sleeve 21 and/or the bottom plate 20 can be provided additionally with anchors 26 if an even stronger anchoring of the mounting point is necessary. The supporting plate 1 can be adjusted after the device is incorporated into the mounting base as described with reference to Figure 1 with the aid of adjusting screws 6 which are screwed into the threaded boreholes 7. The device for adjusting the supporting plate may however be constructed differently to the form shown with the adjusting screws provided, for example, on the bottom plate 20 in a manner not shown. WHAT WE CLAIM IS:

1. A method of producing a plurality of mounting points in a mounting structure comprising casting a base element around tubular elements, one provided for each mounting point, and forming a recess within the base element around the top of each tubular element during the casting, seating a support plate of smaller dimensions than the recess in each recess, adjusting the support plates into a desired position and thereafter filling the spaces between the support plates and the walls of the recesses with a filler.

tubular element.

6. A device according to claim 5, wherein the cup-shaped component comprises a circular bottom plate coaxially connected to the tubular element and an annular sleeve arranged around the periphery of the bottom plate and projecting on both sides beyond the bottom plate.

7. A device according to claim 5 or 6, wherein the cup-shaped component or the bottom plate and/or the annular sleeve has foundation anchors.

8. A device according to claim 5 or 6, wherein a support plate is mounted in the cup-shaped surround.

9. A device according to claim 5, 6 or 7, wherein the cup-shaped component or the bottom plate and/or the support plate has devices for adjusting the support plate into a desired position.

10. A device according to any one of claims 4 to 9, wherein a filler is provided in the cup-shaped surround.

11. A device according to claim 10, wherein the filler is a cast resin.

12. A device according to claim 10 or 11, when appendent directly or indirectly to claim 8, wherein the support plate has a shape which produces triple axis tensioning conditions in the filler.

13. A device according to claim 12, wherein the underside of the support plate has the shape of a truncated hollow cone.

14. A device according to claim 12, wherein the underside of the support plate has conical recesses.

15. A mounting comprising a cast base element, a tubular element embedded in the cast base element and having a cup-shaped annular element therearound forming a recess in the base element, a support plate of smaller dimensions than the recess received in the recess and a filler in the recess for securing the support plate to the walls of the recess.

16. A mounting according to claim 15, wherein the components which surround the filler are such that when the mounting is loaded vertically, a triple axis tensioning condition is produced in the filler.

17. A mounting according to claim 16, wherein the filler is substantially encircled on all sides by the support plate and the elements forming the cup-shaped annular element.

18. A method of producing a plurality of mounting points substantially as described herein with reference to the drawings.

19. A device when used in producing a mounting point substantially as described herein with reference to the drawings.

20. A mounting substantially as described herein with reference to the drawings.