EP1338724A2 - Method for erecting a structure having an annular concrete wall - Google Patents

Abstract

A reinforcing unit (8) is secured to the outer side of an inner falsework (5) when one of the inner false works is lifted from a mounting site.

Description

The invention relates to a method for erecting a building with a circumferentially closed Concrete wall that is constant over its height Has cross section, the circumferentially closed concrete wall in a plurality of concreting steps, in each of which a circumferentially closed Section of the concrete wall next to the top of the already finished part of the concrete wall is concreted and at least one overall circumferentially closed inner formwork unit is provided, which in more than one Concreting step is used.

A "constant cross-section" means that the cross-sectional area the concrete wall over the height of the structure in its shape and size remains unchanged. A "building" also becomes part of an overall building Roger that. Such structures are, for example, round buildings, stairwells, Fireplaces etc.

Climbing formwork is used in connection with the erection of circular structures known in which two circumferentially closed formwork rings on a supporting structure be hung up. The formwork cavity delimited by the formwork rings is filled with concrete after the concrete has hardened or set the formwork rings are loosened and raised so far on the supporting structure that its lower part still in the area of the upper edge of the cast wall ring lies. Then the rings are clamped and fixed again, concrete again filled in and the mentioned interplay repeats itself until the desired one Height is reached. In this way, such a cylindrical structure Wall ring placed on the other.

Another type of climbing formwork is, for example, in US Pat. No. 1,478,653 shown and described. The essence of such climbing formwork is that here formwork anchors penetrating the masonry are to be provided and with which the formwork elements are braced in their entirety, the anchors concreted in at the top during a concreting step in the sequence can be used as foot anchors for the formwork in the next concreting step.

A new anchor is then installed in each concreting step. The formwork will then raised when the previous concrete section of the wall has set has the entire weight of the formwork over the formwork anchors has to carry. The formwork itself consists of the actual formwork panels and the scaffold stiffening the formwork panels.

The following procedure is conventionally used for climbing construction carried out: First, the one intended for the next concreting step Internal formwork on the completed part of the concrete wall at the intended height attached and aligned. Then built-in parts for the concrete wall attached to the inner formwork at the relevant points. Such built-in parts are, for example, anchors or built-in housings for Outlets. If there are recesses in the building wall, for example for windows or doors that are to be kept free are on the finished part corresponding formwork parts attached to the building wall attached to recess such openings. In the further episode the Reinforcement installed for the next section of the building wall to be created, parts of the reinforcement with the inner formwork unit for holding the reinforcement can be connected. The reinforcement has also been isolated at an assembly site on the floor to a finished circumferentially closed Reinforcement cage assembled and subsequently raised with a hoist and via the internal formwork unit attached to the building wall the crown of the wall put up. However, this is only possible if there are no formwork parts attached to the opening of the inner formwork unit are, which would otherwise put the reinforcement cage on the Internal formwork unit would hinder. In the further consequence the outer formwork attached and tensioned with the inner formwork unit and for production a circumferentially closed section of the concrete wall becomes concrete in poured the space between the inner formwork unit and the outer formwork.

The object of the invention is an improved method of the aforementioned Provide way by which such a structure in a particularly efficient and is inexpensive to erect. According to the invention, this is achieved by a Method with the features of claim 1.

In the method according to the invention, at least two in total (i.e. when assembled) circumferentially closed internal formwork units used with the same cross section. "Same cross section" means that the Cross-sectional areas of the formlining of the internal formwork units, i.e. that of the circumferentially closed contours of the formwork in the cross-section Surfaces are the same in shape and size. In the invention The method is the inner formwork unit used in a concreting step at an assembly site that can conveniently be on the floor, pre-assembled, one on the outside of the inner formwork unit Reinforcement is attached. This assembly work can already be done while a previous concreting step is still being carried out on the structure be carried out or during the concrete of the previous concreting step cures. As a result, the pre-assembled inner formwork unit is included the reinforcement attached to it and raised to that of the previous one Concreting step on the remaining climbing bar set off on the building wall. By placing it on this climbing ledge, the inner formwork unit is also aligned enables, so that further alignment steps advantageously can be omitted and the inner formwork unit and the attached to it The reinforcement is in the intended position immediately after it has been set down are located.

The total construction time required can be achieved by the method according to the invention of a circumferentially enclosed structure can be shortened. At least there are two inner formwork units used in several concreting steps provide the same cross-section, one of which is at the assembly site for the next concreting step can be prepared while the other internal formwork unit can be attached to the structure for concreting work. to A further reduction in the construction time can possibly be three or more such internal formwork units be provided with the same cross section. During one Internal formwork unit used for concreting work on the building can then two or more internal formwork units for the next concreting steps be prepared at the respective assembly site.

It is advantageous if any further required at the assembly site Formwork parts to cut out openings in the concrete wall to be created be mounted on the internal formwork unit. The same applies to required Installation parts of the concrete wall, which advantageously at the assembly site on the Reinforcement and / or can be attached to the inner formwork unit.

Fig. 1 bis 3

schematische vertikale Längsschnitte durch ein mittels eines erfindungsgemäßen Verfahren erstellten Bauwerks in verschiedenen Bauphasen;

Fig. 4

eine schematische Draufsicht auf das Bauwerk in der Bauphase gemäß Fig. 3 (ohne die aus der Mauerkrone hervorragenden Armierungsstäbe);

Fig. 5

eine schematische perspektivische Darstellung der abgenommenen mittleren Segmente der Innenschalungseinheit und

Fig. 6

eine schematische perspektivische Darstellung einer Innenschalungseinheit mit Schalungsteilen zur Aussparung von Öffnungen in der Betonwand.

Further advantages and details of the invention are explained below with reference to the accompanying drawings. In this show:
the

1 to 3

schematic vertical longitudinal sections through a building created by means of a method according to the invention in different construction phases;

Fig. 4

a schematic plan view of the building in the construction phase according to FIG 3 (without the reinforcing bars protruding from the wall crown);

Fig. 5

is a schematic perspective view of the removed middle segments of the inner formwork unit and

Fig. 6

is a schematic perspective view of an inner formwork unit with formwork parts to cut out openings in the concrete wall.

The figures have different scales.

In the construction phase shown in FIG. 1, the circumferentially closed one to be erected is Building partially completed. In previous concreting steps several circumferentially closed sections 1 of the concrete wall have already been produced between each of which a concrete joint 21 is visible. On the last one completed Section 1 is the outer formwork on the outside of the concrete wall 2 attached. For fastening the external formwork 2 to the concrete wall in the concrete wall along its circumference in several places in a known manner Anchored 3, which can be constructed in a conventional manner. This Anchors 3 can be accessed from the outside and inside of the concrete wall Have internal threads into which bolts can be screwed.

With a hoist 4, a prepared inner formwork unit 5 to over raised the top of the completed part of the structure. The internal formwork unit 5 comprises a main part 6 and one at the upper end of the Main part 6 arranged and with this for example by means of a screw connection connected climbing ledge 7. The main part 6 and the climbing ledge 7 are in the assembled state, formed to be circumferentially closed and its outer sides together form the formwork skin 11. On the outside of the inner formwork unit a reinforcement 8 is arranged and is used by the inner formwork unit 5 carried. This reinforcement 8 for the next circumferentially closed Section of the concrete wall was opened before the internal formwork unit was lifted 5 assembled at an assembly station and with the internal formwork unit 5 connected. Installation parts of the concrete wall were also attached to the reinforcement 8, the anchor 3 or others to be provided in the concrete wall, for example Parts can include. Furthermore, on the inner formwork unit in Fig. 1 not shown formwork parts for recessing openings in the creating section of the concrete wall.

From the previous concreting step is the inside of the concrete wall Climbing strip 7 of the inner formwork unit used in this previous concreting step 5 attached, by means of anchors 3 cast in concrete and into this screwed, protruding through openings in the climbing strip 7 bolts. The main part 6 of the inner formwork unit used in the previous concreting step 5 has already been removed from the concrete wall. On the Climbing strip 7 attached to the concrete wall in the previous concreting step now the inner formwork unit 5 raised by means of the lifting device 4 is deposited. For centering and aligning the inner formwork unit 5 on the Climbing strip 7 fastened to the concrete wall are at the top of climbing strip 7 Cones 9 are provided, which are in depressions 10 on the underside of the main part 6 are insertable, the shape of the recesses 10 being that of the cones 9 is trained accordingly. The inner formwork unit placed on the climbing ledge 7 5 is thereby already precisely aligned, so that further alignment and leveling work for the inner formwork unit 5 normally can be omitted.

Instead of the cones 9, other devices for centering on the climbing bar 7 attached to the concrete wall may be provided, for example from the climbing strip 7 inward and upward protruding guide plates Inlet slopes for the main part 6 of those to be deposited on the climbing strip 7 Form the inner formwork unit 5. The width of the climbing strip 7 can be as in FIGS. shown to be less than that of the main part 6 or the same size (theoretically can be larger). The main part 6 can be in the usual way Form a frame formwork. The climbing strip 7 can for example be formed by a U-profile, the open side of which faces inwards is.

Positioned on the climbing ledge 7 attached to the concrete wall and with it screwed inner formwork unit 5 is shown in Fig. 2.

The reinforcement 8 attached to the inner formwork unit 5 is located here already in the right position. Furthermore, the one shown in FIG Construction phase already set up the outer formwork 2. The outer formwork 2 can here from a main part 11 and at the upper and lower ends of the main part 11 on this attachable climbing rails 12 exist. Starting from Fig. 1, the main part 11 together with that at the lower end of the main part 11 attached climbing strip 12 removed from the concrete wall. The one at the bottom Climbing ledge 12 fixed to the end of the main part 11 is removed from the latter and attached to the upper end of the main part 11. As a result, the main part 11 with the climbing bar 12 attached to the top of the concrete wall Remaining climbing ledge 12 placed on and connected to it (by screw connections) and further the outer formwork 2 with the inner formwork unit 5 tied in a conventional manner, as indicated by lines 13 in Fig. 2 is indicated.

The next step is the space between the inner formwork and the outer formwork Pour 2 with concrete, up to the upper edge of the climbing rails 7, 12. This Construction phase is shown in Fig. 3. During concreting and curing of the concrete can already be used for the next concreting step Inner formwork unit 5 are prepared at an assembly site 14, which is preferably located on the ground. Again, the reinforcement is already here 8 attached to the outside of the inner formwork unit 5, as well as if necessary built-in parts to be provided in the concrete wall. Depending on the amount of time for the assembly of an inner formwork unit 5 with reinforcement 8 can be parallel also performed assembly work on more than one such internal formwork unit 5 be so that immediately after the hardening time of the concrete of a section the building wall has a fully assembled internal formwork unit with reinforcement 8 is ready for the next section to be created.

To remove an inner formwork unit 5 from the building wall after Concreting a section preferably consists of several circumferential segments fastened to one another by screw connections, for example in the form shown in FIG. 4. There are four corner segments here 15 and four center segments 17 connected to one another via spreader bars 16 intended.

To remove the internal formwork unit, the connected ones are connected Center segments 17 are attached to a hoist via fastening eyes 18 (see FIG. 1) and the fittings between the central segments 17 and the corner segments 15 are solved. The spreader bars 16 have parts that can be screwed into one another, for example a middle part with opposite internal threads at its ends, into which the side parts are screwed in via an external thread. These threads are only in Fig. 4 schematically indicated (reference number 19). By turning the middle parts of the Spreader bars 16, the middle segments 17 are moved together. Before that nor the connections between the middle segments 17 and the corresponding ones Segments of the climbing bar 7 subdivided in the same way, which at the top End of the main part 6 is fixed, solved. The at the lower ends of the By contrast, segments 17 of the lower climbing ledge fastened by means of segments remain connected to the central segments, as can be seen from FIG. 5. The moved together middle segments 17 with those fixed at the lower ends Segments of the climbing strip 7 are subsequently completed from the Part of the structure lifted out. As a result, the corner segments can also 15 and the corresponding segments of the lower climbing bar connected to them 7 can be removed from the concrete wall. It is again the one in FIG. 1 shown state reached.

To remove the inner formwork unit, this could also be done in another way Be divided circumferential direction.

A main part 6 of an internal formwork unit 5 is also shown in FIG the schematically illustrated formwork parts 20 to cut out openings in the section of the concrete wall to be created with this internal formwork unit are attached.

Instead of the square floor plan shown, what could be created Building also have another circumferentially closed plan, for example a rectangular, polygonal or circular floor plan.

The outer formwork 2 could also be designed in a different way than shown be, for example, in one piece (without on the top and on the bottom of a main part of attachable climbing ledges). The height of the outer formwork could also be be different from that of the internal formwork.

Legend for the reference numbers:

1

section

2

external formwork

3

anchor

4

hoist

5

Internal formwork unit

6

Bulk

7

climbing bar

8th

reinforcement

9

cone

10

deepening

11

Bulk

12

climbing bar

13

line

14

assembly area

15

corner segment

16

spreader

17

middle segment

18

securing eye

19

thread

20

form member

21

construction joint

22

scarf skin

Claims (6)

Method for erecting a building with a circumferentially closed concrete wall that has a constant cross-section over its height, the circumferentially closed concrete wall being erected in a plurality of concreting steps, in each of which a circumferentially closed section (1) of the concrete wall is then connected to the upper end of the already completed one Part of the concrete wall is concreted and at least one overall circumferentially closed inner formwork unit (5) is provided, which is used in more than one concreting step, characterized in that at least two overall circumferentially closed inner formwork units (5) with the same cross-section of the formwork skin are used, each one in total have circumferentially closed main part (11) and an overall circumferentially closed, part of the formlining, at the upper end of the main part (11) and removable from this climbing ledge (12), and that in the implementation of at least In one concreting step, the inner formwork unit (5) used in this concreting step, raised from an assembly station (14), is placed on the climbing ledge (7) attached to the concrete wall in the previous concreting step of the inner formwork unit (5) used in this previous concreting step, before lifting the inner formwork unit (5) from the assembly site (14) is provided with a reinforcement (8) for this concreting step on the outside of the inner formwork unit (5). Method according to Claim 1, characterized in that, before the inner formwork unit (5) is lifted from the assembly site (14) on the inner formwork unit (5), formwork parts (20) are attached to cut out openings in the concrete wall to be created. Method according to Claim 1 or Claim 2, characterized in that before the inner formwork unit (5) is raised from the assembly site (14), built-in parts of the concrete wall, such as anchors (3), are attached to the reinforcement (8) and / or to the inner formwork unit (5) become. Method according to one of claims 1 to 3, characterized in that centering devices, preferably cones (9) or guide plates, are arranged on the top of the climbing ledge (7) for centering the inner formwork unit (5) placed on the climbing ledge (7). Method according to one of claims 1 to 4, characterized in that the inner formwork unit (5) placed on the climbing ledge (7) attached to the concrete wall can be fastened thereon, preferably by means of a screw connection. Method according to one of claims 1 to 5, characterized in that the main part (11) of the inner formwork unit (5) and the climbing strip (7) of the inner formwork unit are circumferentially divided into several segments (15, 17), the main part (11) and the climbing strip (12) are preferably subdivided in the same way.

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