Inner shuttering section for the erection of a construction section

0001The invention relates to an internal formwork section establishing a building section with a circumferentially closed concrete wall, its scope supplied via the height of the building portion or decreases, the internal formwork section a circumferentially closed main part whose circumference at its upper end is larger or smaller than at its lower end, and a at the upper end of the main portion having releasably attached thereto climbing ring. Furthermore, the invention relates to an interior system for establishing a formwork Structure in several Betonierschritten, in each of which a building section using an internal formwork section formed from the inner formwork system is established, wherein at least some of the building sections have an increasing or decreasing extent over their height and the associated Internal formwork section a peripherally closed main part whose Circumference greater at its upper end or smaller than at its lower end , and a releasably secured at the upper end of the main part in this climbing ring having

0002In connection with the establishment of circular buildings are climbing formwork are known in which two circumferentially closed shuttering rings on a support structure be suspended. The area bounded by the formwork rings hollow space is filled with concrete, after the hardening or setting of the concrete be resolved the formwork rings and so far raised at shoring that its lower part still in the top of the cast wall ring lies. Then the rings of concrete are again clamped and fixed, again filled and mentioned interplay is repeated until the desired Height is reached. In this way, in such a cylindrical buildings Wall ring set to the other.

0003Another type of climbing formwork, for example, in U.S. Patent 1,478,653 shown and described. The essence of such a climbing formwork is to that here the brickwork must be provided penetrating form ties, to and with which the formwork elements are braced in their entirety, said at a concreting each above concreted anchor in the episode be used as a foot anchors for shuttering the next concreting step. In each concreting a new anchor is then installed. The formwork is then high when the previous concrete wall section tied has, as it on the formwork anchor the entire weight of the formwork has to bear. The formwork itself consists of the actual formwork and the shuttering panels stiffening skeleton.

0004An inner formwork section of the aforementioned type is known from EP 1 156 175 A2. For execution of a work with a frustoconical Form for each of the building sections, a separate internal formwork section present, whose outer contour to the inner contour of the portion of the trainees Concrete wall corresponds. We do this all for the construction of the building necessary internal formwork sections completely before and above the other would be provided to create their outer contour to the inner contour of the entire Concrete wall meet. can by the known method of this document more produced in simultaneous construction similar buildings be erected quickly. A disadvantage is the relatively high consumption of material for the entire internal formwork.

0005From EP 960 986 A2 an internal formwork is known, which consists of individual Formwork sections ( "steel pipe sections") is. The steel pipe sections formed from each other circumferentially adjacent strip elements, the decrease over their height in width. The strip elements assembled on site to the internal formwork sections (formwork pipe sections) and mounted above each other until the desired height of the structure achieved is. Preferably, after mounting each steel pipe section is of annulus between the outer casing pipe sections and the inner formwork pipe sections filled with ready-mixed concrete. Overall, the formwork is as lost constructed formwork and can hereby be static load bearing. Such place formwork or static shear lag formwork have different Disadvantages, for example in terms of the cost of materials, as the formwork in the building remains, and not for another building again can be used.

0006From GB 697 427 A is a formwork for the production of horizontal tubes tunnels and the like are known. So it is not about the creation of a Building, to-the periphery thereof in the height or decreases. When concreting tunnel walls other problems occur than in the production of structures on having an increasing height in the course of its construction, for example, with respect to the continuous attachment of the formwork.

0007The US 4,577,727 B shows a formwork for the construction of circular structures, when a work platform to different diameters of the building can be customized. The internal formwork this formwork includes a Pressure receiving ring which supports the lining skin inwards.

0008Object of the invention is to provide an internal formwork section or an inner formwork system provide the above-mentioned type by which, or by the material saving is achieved. According to the invention this is achieved by an internal formwork section with the features of claim 1 and by an internal formwork system with the features of patent claim 13.

0009In an internal formwork section or internal formwork system according to the invention can at least parts of a building in the construction of a section used internal formwork section for forming an in establishing a further building section required internal formwork section be used, whereby the cost of materials is reduced. The internal formwork section can sufficiently to the concrete during concreting absorb pressure exerted. An inventive internal formwork section or an inventive internal formwork system allows further a rapid and advantageous production process of the individual building sections of the building.

0010Further advantages and details of the invention will become apparent in the following the accompanying drawings explained. In the drawings:<dl tsize="19" compact="compact"><dt>Fig. 1</dt><dd>a schematic view of a wind tower with a frusto-conical Concrete tower;</dd><dt>FIG. 2</dt><dd>a simplified perspective view (oblique view from above) of an embodiment of an inner formwork section according to the invention;</dd><dt>FIGS. 3-5</dt><dd>schematic perspective views of assembling steps the inner formwork section of Fig. 2; </dd><dt>Fig. 6</dt><dd>an enlarged perspective view of a strip element on a mounted clamping hook in greater detail;</dd><dt>Fig. 7</dt><dd>a perspective view of a portion of the assembled main part the internal formwork section, the area of ​​a pressure receiving ring;</dd><dt>Fig. 8</dt><dd>a perspective view of a section of the assembled Main part of the internal formwork section, in the region of the upper edge;</dd><dt>Fig. 9</dt><dd>a perspective view of the climbing ring;</dd><dt>Fig. 10</dt><dd>a perspective view of a portion of the fully assembled inner formwork section, in the connecting region of the ring with the climbing Bulk;</dd><dt>Fig. 11 to Fig. 13</dt><dd>schematic vertical longitudinal sections through a means of Internal formwork section inventive building section to be created in various stages of construction (only in the are shown sectional plane lying parts);</dd><dt>Fig. 14</dt><dd>shows an enlarged detail A of Fig. 11.</dd></dl>

0011The FIG. Drawn to different scales.

0012The wind tower shown schematically in Fig. 1 comprises a wind turbine 1, on a truncated cone-shaped or conical structure 2 made of reinforced concrete in the form a reinforced concrete tower is mounted. For this is on top of the reinforced concrete tower a cap 3 attached sheet steel, which supports the wind turbine. 1 The construction 2 For example, at its upper end has a diameter of 1.8m and having at its base a diameter in the range of 5.8 m. The building 2 is constructed in single Betonierschritten represented by in FIG. 1 the horizontal lines are indicated and each have a height of, for example, 4 to 5m have. In each concreting is a building with Section 4 built a circumferentially closed concrete wall whose circumference at the top End of the respective building portion 4 is smaller than at the lower end is. In the illustrated embodiment, all the building sections 4 a frustoconical Shape, with the truncated cone from the bottom upwards rejuvenated.

0013In FIG. 2 is an embodiment of an inner formwork section according to the invention shown in simplified form. The round in the embodiment shown Internal formwork section has a peripherally closed (in the illustrated Embodiment round) main part 5, at the upper end a circumferentially closed solvable (in the embodiment shown round) climbing Ring 6 is attached. The releasable attachment may for example by means of screw or by means of clamping parts, as explained in more detail below becomes. The (in the illustrated embodiment, circular in cross section) lining skin the internal formwork section is forming of all the outer surface 7 Parts formed. The main part 5 carries this when the majority of the formwork. A contrast smaller part of the formwork shell is also made of climbing ring. 6 The amount formed by the climbing ring 6 h of the formwork is preferably less than 1/10 of the amount formed from the body 5 H of the formwork.

0014The main part 5 is constructed from a plurality of strip elements 9, such as This will be explained hereinafter in particular with reference to FIGS. 3 to 5. The strip elements 9 each strip in the deployed position extending vertically Scarf skin sections 10, at their to be built by the concrete wall remote backs in the operative position by vertically extending inwardly projecting ribs 11, 12 are mounted. These can range from welded or screwed bars or rails are formed and are preferably perpendicular to the formwork shell portions 10 of these from where they extend preferably over the entire height of the main part of the fifth Two of these ribs 12 extend on the two side edges of the respective Strip element 9 and are preferably flush with the front ends the formwork shell portion 10. The peripheral ribs 12, for example, by beadings of existing sheet metal formwork shell sections 10 are formed.

0015To mount the main part 5 initially be several, for example three Strip elements 9 placed side by side on the floor and peripheral to their Ribs 12 by bolts 13 (see FIG. FIG. 8), which holes 14 in the peripheral ribs 12 enforce bolted together. In FIGS. 3 to 5 are for convenience only the holes 14, but not the bolts 13 shown for fastening the abutting strip elements.

0016The curvature of the strip elements joined together at least a rope 15 at the two side edges of the plurality of the strip elements 9 formed element attached. This cable 15 is initially so loose that a spacer 16 approximately in the center of the rope 15 between can be the strip member 9 and the cable 15 inserted. Subsequently the cable 15 is shortened by means of a in Fig. diagrammatically indicated winch 17, wherein the formed member curved, as shown in Fig. 4. Advantageously, at least 2 in the direction of the longitudinal extension of the side edges spaced ropes 15 with spacers 16 and winds 17 provided. Instead of ropes 15 can also chains or other Traction means are used.

00179 to the strip elements clamping hooks 18 are mounted, which in Figs. 3 to 5 are shown only schematically. A more detailed training of an embodiment of such clamping hook is apparent from Fig. 6. The tenterhooks 18 is formed U-shaped with a side leg 19 at a rib 11 the strip element is screwed. 9 The base leg 20 is in the extension direction the rib 11 of the formwork shell portion 10 from the other side and leg 21 is penetrated by a clamping screw 22nd

0018The clamping hooks 18 are used for fastening segments 23 of the pressure receiving rings 24 to the strip elements 9. In total, by the affiliated finished state of the internal formwork section together Segments 23 circumferentially closed, preferably circular, pressure receiving rings 24 is formed, which in the use position of the inner formwork section lie in a horizontal plane. The internal formwork section has at least one such pressure receiving ring 24. Preferably, at least two in the amount (based on the starting position) of each other spaced pressure receiving rings 24 present. A respective pressure receiving ring 24 is to at least some of the strip elements 9, preferably with all Strip elements 9 releasably connected, for any purpose in the embodiment shown signs affixed to the ribs 11 tenterhooks 18. are. It is preferred that for each strip element at least two on different Ribs 11, 12 mounted clamping hooks 18 are present.

0019The segments 23 of the pressure-receiving rings 24 are pre-curved accordingly and are in the clamping hooks 18 of the illustrated example in FIG. 4 Way curved, comprising a plurality of strip elements 9 inserted elements, wherein the clamping screws 22 are initially still open. Consequently, the clamping screws 22 are turned off, so that the segments 23 on the side facing away from the formwork shell sections 10 ends of the ribs 11, 12 are pressed. Such kind lying preassembled element in Fig. 5 shown schematically. This element will be erected in the sequence and several Such elements are the extensive closed main part 5 together connected. For this purpose, the peripheral rib 12 of the edge Strip elements 9 of the elements screwed to one another, in an analogous Manner as the strip elements in the formation of in Fig. 5 shown Element by means of bolts 25, which bores 14 in the ribs 12 prevail (see. Fig. 7). The segments 23 are also connected to each other. For this purpose, at the ends of the segments 23 of flange plates 26 welded be that of directly or with the interposition of spacers 27 bolted together. A screw connection via an adapter 27 is shown in Fig. 7. The adapter has a groin piece 28, on which both sides of flange plates 29 are bolted to the flange plates 26 of the segments 23 are screwed. The flange 29 on the two Ends of the molding 28 are V-shaped toward each other and the flange plates 26 are aligned appropriately to the subsequent disassembly of the Pressure receiving ring 24 to facilitate after concreting.

0020Overall, it is formed in this way, the circumferentially closed main part of the fifth In the exemplary embodiment shown, the circumference of the main part is at its the upper end than at its lower end. To achieve this, takes at least at a part of the strip elements 9, the width of the longitudinal extent over their from the bottom from the top. So these strip elements have in View seen from the bottom upwards conically tapered shape or a trapezoidal shape (preferably an isosceles trapezoid). The remaining Strip elements may have a constant width, so in view be designed seen rectangular. It would also be conceivable and possible that all strip elements is conically tapered or trapezoidal are.

0021To complete the inner formwork section is at the upper end of the Main part 5 the climbing ring 6 attached. The climbing ring 6 has in the embodiment shown as shown in Fig. 9 is a vertical St EC 8, the part of a the formwork the inner formwork section forms and at the at the top and attached to the lower end inwardly projecting horizontal bars 30, 31 are such that the ridges 8, 30 and 31 together form a U-shaped cross-sectional shape exhibit. At the upper horizontal web 30 is an upwardly projecting spring-like Bar 32 and the lower horizontal web 31 is a downwardly projecting spring-like strip 33 is mounted, the strips 32, 33 radially inward of the web are 8 and for example welded to the horizontal webs 30, 31 are. The strips 32, 33 extend over the major part of the circumference the climbing ring 6. The climbing ring 6 consists of several segments 34 which screwed together (or stuck) are. In the embodiment shown are at the ends of segments 34 each between the horizontal webs 30, 31 extending flange disposed 35, which means in the bores bolted flange plates 35 passing through bolt 36th In the connection area of two segments 34, the strips 32, 33 interrupts on.

0022The ribs 11, 12 of the strip elements 9 have in their upper and lower End portions of slots 37, 38 (see FIG 8 and FIG. 14;.. The slots are shown in FIGS. 3 to 5 of simplicity not shown). The slots 37 in the upper end portions go from the upper front ends of the ribs 11, 12 and have a V-shaped extended insertion zone, as can be seen from FIG. 8. Emanating from the lower front ends of the ribs 11, 12 slots 38 are formed in an analogous manner in the lower end portions of the ribs 11, 12th For connecting the climbing ring it is printed on the upper end of Main portion 5 fitted with its downwardly projecting bar 33 in the Slots is introduced 37th At some of the ribs 11, 12, for example at the peripheral ribs 12 are angle 39 attached. At least some of the angle 39 are connected to the lower horizontal leg 31 of the climbing ring 6 by means of clamps 40 clamped as shown in Fig. 10, the lower horizontal flange 31 rests on the top front ends of the ribs 11, 12th Instead of Clamping connection would also be a screw for detachable fastening of the Climbing Rings 6 conceivable and possible to the main part. 5

0023Such of completed internal formwork section may subsequently in Construction of a building section are used, as in the following is explained with reference to FIGS. 11 to 14.

0024Fig. 11 shows the construction phase, in which a previous building section the circumferentially closed concrete wall 42 has been already completed. At the concrete wall 42 are means walled anchor 43 has an inner and an outer Working platform 44, 45 are attached, whose training in the present context not be explained in detail needs. To the concrete wall 42 is further climbing ring 6 'of play in implementing the preceding structure portion Internal formwork section used mounted. For this purpose, Dowel 46 (see. Fig. 14) built into the concrete wall 42, in which the vertical Web 8 of the climbing ring 6 'passing through bolts 47 are screwed. Of the vertical web 8 of the climbing ring stands on the upper edge 48 of the finished Section of the concrete wall 42 something before.

0025On these to the concrete wall 42 attached climbing ring 6 'is now by means of a hoist 41 of the internal formwork section 50 to be set up for the next placed building section, as can be seen from FIG. 11. To this end, The slots 38 at the lower ends of the ribs 11, 12 in the upward projecting ledge 32 of the climbing ring 6 'is inserted and the lower end faces of the ribs 11, 12 on the upper horizontal web 30 of the climbing ring 6 'is placed. To secure the internal formwork section 50 on the climbing ring 6 are ' attached to some of the ribs 11, 12, for example to the ribs 12 Angle 49 (which are functionally analogous to the angles 39) by means of clamps 51 to the upper horizontal web 30 of the climbing ring 6 'braced. Instead of Jamming would turn a screw between the climbing ring 6 ' and the main part 5 for releasably securing conceivable and possible.

0026Preferably, the internal formwork section 50 already at its lifting by means of the hoist 41 and placed on the climbing ring 6 'a reinforcement 52 mounted with attached mounting parts, such as anchors 43rd The attachment of the reinforcement to the internal formwork section 50 can thus carried out on the ground. Through holes in the upper end of the main part 5 fortified climbing ring 6 of the internal formwork section 50 are further performed bolts and screwed into dowels 46, which during the subsequent Concreting are concreted to the climbing ring 6 to be produced at the attach concrete wall.

0027As a result, an outer casing portion 53 is mounted and the intermediate the internal formwork section 50 and the outer casing section 53 lying Space filled with concrete to form the building portion 4th The construction phase after concreting is shown in Fig. 12. The external formwork section 53 may be formed here in a conventional manner. The external formwork section this may also consist of strip elements and in the way be formed as, for example, from the outset EP 1156175 A2 mentioned is his, formed known. The external formwork section here is without climbing rings 6 and no horizontally extending stiffening formed rails, since the outer formwork is only loaded on train and Tensile forces than compressive forces to take much easier. With others Words requires the external formwork no rigid and forming the supporting structure, like this when internal formwork section by at least one Pressure receiving ring 24 and the climbing rings 6, 6 'formed.

0028After the concrete of the building section created is applicable cured that it is self-supporting, the outer formwork section 53 can be removed will. Furthermore, the climbing ring 6 'of the previous building section decreased belonging internal formwork section by the bolts 47 are unscrewed and the climbing ring 6 'in its segments 34 is decomposed. As a result, the main part 5 is removed, the on at its upper end fixed climbing ring 6 depends. To this end, after the acceptance the pressure receiving rings 4 initially unscrewed individual strip elements 9 (Said to facilitate disassembly a strip element 9 exhibit analogous to the flange plates 29 V-shaped edge-side ribs 12 could, which at respective peripheral ribs of the adjacent strip elements 9 could be applied; also against the strip elements 9 narrower intermediate member could be provided) and in the result, the Connecting this strip members 9 solved with the climbing ring. 6 The climbing ring 6 remains on the finished section of the concrete wall 42 attached to a support to serve for the internal formwork section of the next building section. This construction is shown in Fig. 13. As a result, the inner Work platform and the external work platform 44, 45 up and put on the immured in now completed section of the concrete wall 42 Anchor 43 attached.

0029For construction of the next building section is the next internal formwork section mounted in an analogous manner and in consequence to the climbing ring 6 placed. It can in the assembly of this internal formwork section strip elements be used, which already at a section internal formwork have been used for an earlier structure portion, in accordance the desired radius and the desired shape of the inner formwork the strip elements are 9 composed accordingly. In the Construction of a total of frustoconical building can be, for example, with any construction section some of the rectangular strip elements be removed, so that at the end (at the top Structure section) only trapezoidal strip elements are present. Climbing Rings 6 and pressure receiving rings 24 are available for the diameter required in each case. If on the height of the building continuously decreasing Radius thus for each internal formwork section has its own climbing Ring 6 and at least one own pressure receiving ring 24 is inserted. Overall, nevertheless against each fix trained internal formwork sections a considerable saving of material.

0030In order to optimize the timing may be advantageously provided, with at least two, preferably three internal formwork portions simultaneously to work. Here, at the same time at a first internal formwork section the conversion, ie its mounting for the intended building section be carried out, a second, already converted internal formwork section can be reinforced and a third internal formwork section can be in use are during concreting.

0031In an internal formwork system according to the invention is a high occupational safety achieved because much of the work is carried out on the ground can. In the height of only the mounting and dismounting to the internal formwork sections and concreting are performed while the assembly line carried out reinforcement work on the internal formwork sections at the bottom can be.

0032An inventive internal formwork system is particularly at higher Structures and / or not easily accessible structures beneficial.

0033Various modifications of the embodiments shown are conceivable and may be made without departing from the scope of the invention. Thus, an under Using an inner formwork system according to the invention to be constructed building besides building sections whose scope extends over the height of the building section changes even those have a constant circumference.

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TO THE REFERENCE NUMBERS:

0034<dl tsize="5" compact="compact"><dt>1</dt><dd>windmill</dd><dt>2</dt><dd>building</dd><dt>3</dt><dd>cap</dd><dt>4</dt><dd>building section</dd><dt>5</dt><dd>Bulk</dd><dt>6, 6 '</dt><dd>climbing ring</dd><dt>7</dt><dd>outer surface</dd><dt>8th</dt><dd>web</dd><dt>9</dt><dd>strip element</dd><dt>10</dt><dd>Formwork shell section</dd><dt>11</dt><dd>rib</dd><dt>12</dt><dd>rib</dd><dt>13</dt><dd>bolts</dd><dt>14</dt><dd>drilling</dd><dt>15</dt><dd>rope</dd><dt>16</dt><dd>spacer</dd><dt>17</dt><dd>winch</dd><dt>18</dt><dd>tenterhook</dd><dt>19</dt><dd>side leg</dd><dt>20</dt><dd>base leg</dd><dt>21</dt><dd>side leg</dd><dt>22</dt><dd>clamping screw</dd><dt>23</dt><dd>segment</dd><dt>24</dt><dd>Pressure receiving ring</dd><dt>25</dt><dd>bolts</dd><dt>26</dt><dd>flange</dd><dt>27</dt><dd>connecting piece</dd><dt>28</dt><dd>piece of molding</dd><dt>29</dt><dd>flange</dd><dt>30</dt><dd>horizontal web</dd><dt>31</dt><dd>horizontal web</dd><dt>32</dt><dd>strip</dd><dt>33</dt><dd>strip</dd><dt>34</dt><dd>segment</dd><dt>35</dt><dd>flange</dd><dt>36</dt><dd>bolts</dd><dt>37</dt><dd>slot</dd><dt>38</dt><dd>slot</dd><dt>39</dt><dd>angle</dd><dt>40</dt><dd>clamp</dd><dt>41</dt><dd>hoist</dd><dt>42</dt><dd>concrete wall</dd><dt>43</dt><dd>anchor</dd><dt>44</dt><dd>inner work platform</dd><dt>45</dt><dd>external work platform</dd><dt>46</dt><dd>dowel</dd><dt>47</dt><dd>bolts</dd><dt>48</dt><dd>upper margin</dd><dt>49</dt><dd>angle</dd><dt>50</dt><dd>Internal formwork section</dd><dt>51</dt><dd>clamp</dd><dt>52</dt><dd>reinforcement</dd><dt>53</dt><dd>External formwork section</dd></dl>