Formwork for producing concrete tubbing in a tunnel lining system

Abstract

The invention relates to formwork for producing concrete tubbing (500) for a tunnel lining system, with a concrete tub to receive a volume of concrete required to produce the tubbing and, if necessary, to receive the intended reinforcement for the concrete tubbing (500), wherein the concrete tub has at least one base and walls (14, 15) on the base adapted to the mould, wherein at least one wall is arranged detachably from the base and can be pivoted relative to the base between a closed position and an opened position. According to the invention, the formwork has at least one drive system for pivoting the at least one wall between the open and the closed position and for holding same in the relevant position, and the drive system has at least one actuator for pivoting the at least one wall between the open and the closed position.

Description

[0001] Formwork for the production of a concrete tunnel segment of a tunnel expansion system

[0002] The invention relates to a formwork for producing a concrete tunnel segment of a tunnel lining system, comprising a concrete trough for receiving a quantity of concrete necessary for producing the segment and, if necessary, for receiving the intended reinforcement of the concrete segment, wherein the concrete trough has at least a bottom and walls adapted to the shape of the bottom, wherein at least one wall is detachable from the bottom and pivotable relative to the bottom between a closed position and an open position.

[0003] The individual steps involved in the production of concrete tunnel segments are carried out manually. Besides the associated labor costs, the work is monotonous and strenuous for the employees. Furthermore, the tasks are performed with heavy objects, posing a risk of injury. Despite the repetitive nature of the work, it is essential to perform it with a very high degree of precision.

[0004] This applies particularly to the use of formwork. At various workstations along the production line, formwork must be partially or fully opened or closed. This is done manually and is therefore labor-intensive and time-consuming. Furthermore, considerable care must be taken, especially when closing the formwork, to ensure it is watertight and the concrete does not leak out during pouring.

[0005] The object of the invention is therefore to reduce at least some aspects of the aforementioned problems. This object is achieved by the formwork having at least one drive system for pivoting the at least one wall between the open and closed positions and for holding it in the respective position, and by the drive system having at least one actuator for pivoting the at least one wall between the open and closed positions.

[0006] This makes it easy to simplify opening and closing, while also ensuring that the formwork remains securely closed.

[0007] A further aspect of the invention provides that at least two walls touch each other at one of their two outer end regions with their short sides in a closed position, thereby forming a corner of the concrete trough. It is advantageous that a male engagement element is provided on one of the two walls in the outer end region and a female engagement element on the other wall in the outer end region, which interlock when the two walls are closed. This ensures a simple and secure closure of the corner.

[0008] It is further advantageous that the two walls are connected to each other at their outer end regions by means of at least one screw connection or a clamp connection, wherein the screw connection or clamp connection preferably serves to secure the position, and / or wherein the screw connection comprises a screw with a spring element arranged along at least a portion of the screw. This provides a particularly simple additional locking mechanism that ensures the positioning remains secure in a straightforward manner.

[0009] A further aspect of the invention provides that the clamping connection has a locking element which is arranged on one of the wall elements and is pivotably movable between an open and a closed position by means of at least one actuator, for example a hydraulic cylinder or a spindle system. It is advantageous that the actuator is connected to the drive system described below. This allows for a simple locking mechanism.

[0010] A further teaching of the invention provides that the at least one wall for moving between the open and the closed position is equipped with at least two actuators of the

[0011] 2 drive systems are connected. This makes it easy to apply and distribute the necessary holding forces.

[0012] A further aspect of the invention provides that the at least one wall element has two outer end regions, and that at least one actuator is provided for each end region to move and hold the wall element. It has been shown that this ensures a particularly simple and tight seal even when the formwork is filled with concrete and the side walls may deform as a result.

[0013] A further aspect of the invention provides that the drive system can be connected to an external drive at a workstation. This allows the formwork design to be as simple as possible, since a drive unit within the formwork can be omitted.

[0014] A further aspect of the invention provides that the drive system is a hydraulic system with at least one hydraulic circuit, wherein the drive system has at least one hydraulic cylinder as an actuator, which is connected to the hydraulic circuit. This allows both movement and holding to be provided with sufficient force in a simple manner.

[0015] It is advantageous that the hydraulic circuit includes a locking element for maintaining pressure within the hydraulic circuit, preferably a load-bearing valve. It is further advantageous that the hydraulic circuit includes an element for compensating for pressure and / or volume changes within the hydraulic circuit, preferably a dummy cylinder or a diaphragm accumulator. It is also advantageous that the hydraulic circuit includes at least one connection element for detachably connecting the hydraulic circuit to a hydraulic power unit as an external drive for the drive system at a workstation. Furthermore, it is advantageous that the individual hydraulic cylinders are connected by means of pressure sequence valves. This allows for simple sequence control of the individual steps of opening and / or closing the formwork.A hydraulic circuit according to the invention can be provided in a simple manner by means of at least one of the aforementioned elements.

[0016] A further aspect of the invention provides that the drive system is a mechanical drive as an actuator, preferably a spindle drive. It is advantageous that the mechanical drive is self-locking or equipped with a locking element. It is further advantageous that the mechanical drive is

[0017] 3 Connecting element for detachable connection to an external rotary drive, for example a torque screwdriver, as an external drive of the drive system at a workstation.

[0018] A further aspect of the invention provides that at least one cover element is pivotably mounted on the formwork and can be positioned on the top of the concrete trough, at least partially covering the top. It is advantageous that the cover element can be pivoted between an open and a closed position by means of at least one actuator, for example a hydraulic cylinder or a spindle system, which preferably holds the cover element in the respective position. It is further advantageous that the actuator is connected to the drive system described above.

[0019] Another teaching of the invention provides that the lid element has a locking element which locks the lid element in a closed position relative to the formwork.

[0020] The invention is explained in more detail below with reference to exemplary embodiments in conjunction with a drawing. The drawing shows:

[0021] Figure 1 shows a top view of a production plant according to the invention,

[0022] Figure 2 is a spatial view of Figure 1.

[0023] Figure 3 is a side view of Figure 1.

[0024] Figure 4 shows another spatial view of Figure 1.

[0025] Figure 5 is a spatial enlargement of Figure 3.

[0026] Figure 6 is a spatial section view of Figure 5,

[0027] Figure 7 shows a spatial view of a first embodiment of an invention.

[0028] Formwork,

[0029] Figure 8 is an enlarged detail view of Figure 7.

[0030] Figure 9 shows a spatial view of an opened first embodiment of the formwork according to the invention,

[0031] Figure 10 shows a sectional view through a fastening element related to Figure 7.

[0032] Figure 11 shows a spatial view of a second embodiment of an invention.

[0033] Formwork in closed state,

[0034] Figure 11a is an enlarged detail view of Figure 11.

[0035] Figure 12 is a bottom view of Figure 11.

[0036] Figure 12a is an enlarged detail view of Figure 12.

[0037] Figure 12b shows another enlarged detail view of Figure 12,

[0038] Figure 13 shows a spatial view of a second embodiment of a formwork according to the invention in the open state.

[0039] Figure 13a is an enlarged detail view of Figure 13,

[0040] Figure 13b shows another enlarged detail view of Figure 13,

[0041] Figure 14 shows a spatial side view of the side wall of the invention according to the invention.

[0042] Formwork for figures 11 and 13, and

[0043] Figure 15 shows a spatial side view of the end wall of the formwork according to the invention.

[0044] Figures 1 to 4 show a production plant 100 for concrete tunnel segments 500 in which a formwork 10 according to the invention is used. The production plant 100 is, for example, designed as a carousel system for the formwork 10. Alternatively, the formwork according to the invention can also be used in a stationary system (not shown), in which the formwork remains in one place for the manufacturing steps before being placed in a hardening plant for accelerated initial hardening of the concrete tunnel segment 500, if such hardening is necessary.

[0045] The circulating system shown here as an example consists of at least one production line 200 and a hardening tunnel 300. The hardening tunnel 300 has, for example, at least one hardening line 310, or, as shown in Figure 1, three hardening lines 310. The production line 200 and the hardening tunnel 300, or rather its hardening lines 310, are connected by a transverse conveyor 400.

[0046] Production plant 100, for example, has a transport path 110. Transport path 110, for example, has a track 111 on which the formwork 10 can be moved. For this purpose, the formwork either has its own transport means, for example in the form of wheels, or the formwork 10 is arranged on a separate transport means 112. The formwork 10 / the transport means 112 move along transport path 110 in the direction of arrow A through production line 200, for example by driving the wheels or by means of a carrier (not shown).

[0047] After passing through production line 200, the formwork 10 is fed by a transverse conveyor 400 in the direction of arrow B to the hardening lines 310 of the hardening tunnel 300. The transverse conveyor 400 also has a track 1 11 on which the formwork 10 / the transport means 1 12 are moved, for example by driving the wheels or by means of a carrier (not shown). The same applies to the hardening lines 310 of the hardening tunnel 300.

[0048] 5. After passing through the hardening tunnel 300 in the direction of arrow C, the transport vehicles 112 are returned to the production line 200 via the transverse conveyor 400 in the direction of arrow D. The cycle is then complete.

[0049] In the direction of arrow A, viewed from left to right in Figure 1, production line 200 has, by way of example, six workstations 210 - 260.

[0050] At the first workstation 210, the formwork 10 is opened as explained below.

[0051] At the second workstation 220, the finished tunnel segment 500 is removed from the formwork 10 using a lifting element (not shown). Alternatively, this can also be done at the first workstation 210, in which case workstation 220 can be omitted.

[0052] At the third workstation 230, the preferably open formwork 10 is cleaned and prepared for receiving the installation elements and for concreting. For this purpose, for example, a release agent (formwork oil) is applied to all surfaces and parts of the formwork that will come into contact with the concrete of the tunnel segment 500 to be produced and are not intended to become part of the tunnel segment 500.

[0053] At the fourth workstation 240, the formwork 10 is fitted with the components that are part of the finished tunnel segment 500. These include, for example, reinforcement 510, electrical anchors (not shown), a protective liner, or similar items.

[0054] After the insertion of the components, which can alternatively also be fully or partially inserted into the formwork 10 at the third workstation 230 after completion of cleaning and preparation, the formwork 10 with the inserted components is checked to ensure that the formwork 10 is correctly assembled and the components of the tunnel segment 500 are correctly arranged.

[0055] The assembly of the formwork 10 with the components can also be carried out in stages at workstations 230 and 240.

[0056] In the fifth workstation 250, the formwork covers (not shown), if not already installed, are mounted. Alternatively, if the covers are movable on the formwork 10, they can be closed before entering the fifth workstation 250 or within the fifth workstation 250. This closing process is explained below. The concrete to be placed in the formwork 10 after the necessary...

[0057] The mixture is prepared in the required quantity and placed into formwork 10 at the fifth workstation 250. The concrete is then compacted in a known manner, for example by vibration. Alternatively, the placement and compaction can be carried out in several stages.

[0058] Before or at the sixth workstation 260, the cover(s) of the formwork 10 are removed / opened and the concrete surface 520 of the tunnel segment is treated, for example, smoothed. After treatment / smoothing, the covers of the formwork 10 are closed again, as described below.

[0059] The production line 200 is then left after the sixth work station 260 in this example, in which the formwork 10 / transport means 1 12 with the formwork 10 and the raw tubbing 500 completely produced in the formwork 10 is transferred to the transverse conveyor 400.

[0060] The number of workstations shown here is only an example. A qualified professional can easily adjust the number of workstations to suit specific needs by combining or decoupling individual work steps.

[0061] A first embodiment of the formwork 10 (see Figs. 5 to 10) is, for example, arranged above a base 11 of the transport vehicle 112. The formwork itself has a base 12 by which it can be positioned on the base 11. Above the base, an interior space 17 is provided as a concrete trough, formed by a floor 16 and the inner walls of the end walls 15 and side walls 14. The components and the concrete are placed into this concrete trough or interior space 17.

[0062] In this embodiment, the base 12 is pivotally connected to two side walls 14 of the formwork 10 via pivot connections 13. Furthermore, the formwork 10 has two end walls 15. In the formwork assemblies 10 shown in Figures 5 to 10, the end walls 15 are rigidly connected to the base 12. It is equally possible for the end walls 15 to be rigidly pivotally connected to the base 12 via hinge connections.

[0063] In the embodiment shown in Figures 5 to 10, the side walls 14 are connected to the base 12 and the end walls 15 by means of screw connections. A cross-sectional view of such a screw connection is shown in Figure 10. It has a screw 19 that is screwed into a threaded element 20 located on the base 12 or, for example, on the end wall 15. The screw 19 is inserted into a threaded element 20, for example, on the side wall.

[0064] 7 14 sleeve 21 attached over a continuous opening (not shown). The sleeve 21 has a spring section 22 in which a spring 23 is provided.

[0065] If the threaded element 20 and the sleeve 21 are aligned one above the other, for example when the side wall 14 is positioned against the end wall 15 and the base 12, the screw 19 can be screwed into the threaded element 20 and thus lock the side wall 14 against the base 12 and / or the end wall 15.

[0066] A drive system is provided for this purpose, enabling the movement of the side walls 14 against the base 12 and / or the end walls 15, or alternatively, the base 16. For example, this can be a spindle system as a mechanical drive which, when driven, moves the side walls 14 around the pivot connection 13 in the double arrow direction G either away from or towards the base 12, the end walls 15, and the base 16. Alternatively, other drive systems, such as hydraulic cylinders, can also be used. A further embodiment with a hydraulic drive system is explained in a second embodiment according to the invention, but can also be used alternatively in the first embodiment.

[0067] If a mechanical drive system is used, it can be designed to be self-locking, so that no screw connections are necessary to hold the side walls 14 against the base 16 and the side walls 15. Alternatively or additionally, a locking element (not shown) can be used to ensure holding by preventing reverse movement of the spindle drive.

[0068] In a preferred embodiment, the central spindle can also be driven with a suitable tool, preferably the same tool used to loosen and tighten the screws 19. Figures 7, 8, and 9 show a rod element 24 that is movable from the central spindle in the direction of the double arrow H.

[0069] The screw 19 is screwed into the threaded element 20 against the spring element 23, or when unscrewing it the spring element 23 pushes the screw 19 outwards, so that it moves more easily out of the threaded element 20 when unscrewing it.

[0070] This makes it easy for a torque screwdriver to be used as a tool 150 on the robot 140, allowing the screw 19 to be unscrewed from the threaded element 20 so that it is safely loosened without the torque screwdriver having to exert a tensile force on the screw 19.

[0071] 8 Furthermore, the formwork 10 has engagement openings 25 in the area of ​​the screws 19, into which a torque transfer element 151 engages in order to relieve the tool 150 or the robot 140, which would otherwise have to carry the torque accordingly.

[0072] A second embodiment of the formwork 10 according to the invention is shown in Figs. 1 1 to 15.

[0073] The formwork 10 has an interior 17 for receiving reinforcement, embedded parts and concrete for the production of the concrete tunnel segment 500. This is formed by a base 16 and the inner sides of the side walls 14 and the end walls 15. The base 16 is arranged on a base 12.

[0074] The side walls 14 and the end walls 15 are fixedly mounted to the base and pivotally mounted via a pivot connection 13, 26. The pivot connection 13, 26 is each connected to the side wall 14 and the end wall 15, respectively, via a connecting element 27. The side walls 14 and end walls 15 are pivoted about a pivot point 28 via the connecting elements 27, so that the side walls 14 and end walls 15 detach from the base 16 and pivot outwards, as shown in Figure 13. The pivoting occurs in the direction of the double arrow I.

[0075] The base 12 has a lower frame 28 on which, among other things, a chassis is arranged, which here, for example, has wheels 29. Alternatively, the frame 28 can also be arranged on a transport element 1 12 in order to be moved along a production line, or the track of the production line itself has rollers on which the formwork 10 can be moved.

[0076] Base elements 31 and actuators 32, preferably in the form of hydraulic cylinders, are provided in an interior space 30 of the base 12 and are rigidly connected to the base element 31. A movement element 33 of the actuator 32, for example a piston rod, is connected to the connecting element 27. By linearly moving the movement element 33 of the actuator 32, the connecting element 27 is moved from a side wall 34 of the base 12 in the direction of the double arrow H. Simultaneously, it is rotated about the pivot point 38, so that the side wall 14 is moved away from the interior space 17 or floor 16, thus opening the formwork 10 with respect to the side walls 14.

[0077] 9. To open the end walls 15, which are also connected to the base 12 via a connecting element 27 with a pivot connection 26 having a pivot point 38, at least one actuator 35, here for example a hydraulic cylinder, is provided. This can be arranged in the interior 30 in conjunction with the base element 31, similar to the actuator 32 described above. Alternatively, the actuator 35 is arranged on the side wall 14 via a connection 36. In the connection 36, the actuator 35 is rotatable about a first axis 37 and simultaneously rotatable about a second axis 39, so that when the end wall 15 is open, the actuator 35 can pivot together with the side wall 14 when the latter is opened.

[0078] The same applies to the connection 40, with which the actuator 35 is connected to the end wall 15. The actuator 35 has a movement element 41, here for example a piston rod, which can be moved out of the actuator 35 in the double arrow direction H in order to pivot the end wall 15 about the pivot point 38 in the pivot connection 26 in the double arrow direction I.

[0079] A corner 46 of the interior 17 is formed by the contact of an outer surface 42 of an end wall 15 with an outer surface 43 of a side wall 14. Additionally, a male and a female engagement element 44, 45 are provided on the outer surface 42 of the end wall 15 and, correspondingly, on the outer surface 43 of the side wall 14, which interlock when the formwork is closed. Here, the male engagement element 45 is preferably arranged on the end wall 15 and the female engagement element 44 on the side wall 14, so that the male engagement element 45 prevents movement of the side wall 14 when the end wall 15 is closed. By pulling and holding the movement element 41 of the activator 35, the end wall 15 is pressed against the side wall 14 at its outer end 43 at its outer end 42.Simultaneously, the male engagement element 45 engages the female engagement element 44, thereby locking it in addition to attracting and holding the movement element 33 of the actuator 32, so that the side wall 14 cannot be detached from the base 16 as long as the end wall 15 is in contact with the base 16. At the same time, preferably in conjunction with the engagement elements 44, 45, the opening of the corners 46 formed between the side walls 14 and the end walls 15 is effectively and easily prevented by the attraction and holding of the movement element 41 of the activator 35 at its outer end 42.

[0080] Detachment of the side walls 14 and the end walls 15 from the base 16, for example due to load deformation by the concrete placed inside, is prevented by distributing the pivot connections 13, 26 along the side walls 34, 47 of the base 12.

[0081] 10 Furthermore, the formwork 10 has two covers 50 which are attached to the base 12 and which are either closed, as shown in Figure 1 1, or open, as shown in Figures 13 and 14, during the manufacturing process of the concrete tunnel segment 500.

[0082] The covers 50 can be pivoted in the direction of the double arrow J between the closed position on the interior 17 and the open position. They serve to close the formwork 10, or rather its interior 17, at the top when the concrete is poured into the interior 17. In tunnel segment production, formwork 10s are known with partial covers, as shown here in the second embodiment of the formwork 10 according to the invention, or without covers 50, as is exemplified in the first embodiment according to the invention. The uncovered areas are closed with a cover before the formwork 10 is filled with concrete, leaving open areas through which the concrete is then poured into the interior 17. These additional covers are attached before or inside the concreting station.

[0083] If, as in the second embodiment shown here, covers 50 are provided on the formwork 10 that can be moved between an open and a closed position, these are closed in or before the concreting workstation. After concreting, the covers are either removed or reopened to allow the surface 520 of the raw concrete tunnel segment to be processed in a corresponding further workstation / in a further work step. After completion of this work step, the covers 50 are closed again. Subsequently, the formwork 10 with the closed covers 50 are moved to the curing station. Within the curing station, the covers 50 remain closed. After curing is complete, the covers 50 are opened. Then, the side walls 14 and the end walls 15 are also opened in the necessary sequence. The pre-cured concrete tunnel segment 500 can then be removed.

[0084] After the removal of the concrete tunnel segment 500, the formwork 10 is cleaned accordingly and prepared for the production of a new concrete tunnel segment 500, as described previously. Depending on transport options, the side walls 14, end walls 15, and lid 50 are either closed or remain open. At the cleaning station, the lid 50, end walls 15, and side walls 14 may need to be reopened to ensure thorough cleaning. Following cleaning, the side walls 14 and end walls 15 are closed. The interior 17 is then fitted with the appropriate reinforcement and embedded components. Once this is complete, the formwork 10 is prepared for concreting as described previously.

[0085] 11 The covers 50 are provided with connecting elements 51, which are connected to the base 12 via a pivot connection 52. The pivot connection 52 is rotatably mounted on a projection element 53. An actuator 54 is provided, which is connected to the base 12 parallel to the projection element 53. The connecting element 51 extends beyond the pivot connection 52. The movement element 55 of the actuator 54 then engages this part of the connecting element 51. By extending and retracting the movement element 55, the cover 50 is pivoted in the direction of the double arrow J about the pivot point 38 located in the pivot connection 52. Spring elements 56 are provided to assist the opening and closing, or the execution of the pivoting movement in the direction of arrow J.

[0086] The actuator 54 is preferably a hydraulic cylinder. The moving element 55 is the piston rod of the hydraulic cylinder. Besides opening and closing, the actuator 54 also holds the cover 50 in the respective position.

[0087] In addition, locking elements 57 are provided on the lid 50 for securing the lid. These locking elements are equipped with an actuator 58, which has a movement element 59. The movement element 59 is connected to a locking element 60, which can be moved between a locking position and a free position by extending and retracting the movement element 59; preferably, it can be pivoted. For locking, engagement openings 61 are provided on the side walls 14 and end walls 15, into which the locking element 60 engages. Locking occurs, for example, during the hardening process.

[0088] To control the actuators of the formwork 10, if these are designed as hydraulic cylinders, they are part of a hydraulic circuit. The actuators are subsequently referred to as hydraulic cylinders. The hydraulic cylinders 32 for opening and closing the side walls and the hydraulic cylinders 35 for opening and closing the end walls are arranged such that the walls close when the hydraulic cylinder retracts. The hydraulic cylinders 54 of the cover 50 and the hydraulic cylinders 58 for actuating the locking elements 60 are arranged such that the cover 50 and the locking element 60 close when the hydraulic cylinder retracts.

[0089] At the respective workstations where the hydraulic cylinders need to be actuated, the hydraulic circuit is connected to a hydraulic power unit (not shown) via a connection. The application of the holding force of the hydraulic cylinders occurs after the side walls 14 and end walls 15, as well as after the covers, have been closed.

[0090] 12 50 and the locking element 60 must remain in place after the hydraulic circuit of the formwork 10 is disconnected from the drive unit.

[0091] The necessary closing forces are maintained by load-holding valves (not shown) integrated into the hydraulic circuit. These valves prevent the hydraulic fluid introduced into the hydraulic cylinder from flowing back out after the hydraulic power unit stops supplying fluid to the circuit, thus maintaining constant pressure on the piston surface of the hydraulic cylinder.

[0092] To counteract pressure fluctuations / volume changes in the hydraulic circuit, for example due to temperature changes in the hardening plant, compensating elements are provided at appropriate points in the hydraulic circuit. These can be, for example, diaphragm accumulators or dummy cylinders.

[0093] The order in which the cylinders are pressurized with hydraulic fluid determines the necessary control sequence. Switchable locking elements can be provided between the individual cylinders to control the sequence of the individual movements. These are preferably pressure sequence valves.

[0094] 13

Claims

JESSENSTRASSE 4 22767 HAMBURG GERMANY Applicant: Herrenknecht AG www.klickow-wetzel.de Schlehenweg 2, 77963 Schwanau, Germany Phone: +49 (0)40 380 8715-0 Fax: +49 (0)40 380 8715-25 Email: mail@klickow-wetzel.de HKN-134-PCT April 7, 2020 Patent claims 1. Formwork for producing a concrete tunnel segment (500) of a tunnel lining system, comprising a concrete trough for receiving a quantity of concrete necessary for producing the segment and, if necessary, for receiving the intended reinforcement of the concrete tunnel segment (500), wherein the concrete trough has at least a bottom and walls (14, 15) adapted to the shape of the bottom, wherein at least one wall is detachable from the bottom and pivotable relative to the bottom between a closed position and an open position, characterized in that the formwork has at least one drive system for pivoting the at least one wall between the open and the closed position and for holding it in the respective position, and that the drive system has at least one actuator for pivoting the at least one wall between the open and the closed position.

2. Formwork according to claim 1, characterized in that at least two walls touch each other with their short sides in a closed position at one of their two outer end regions, thereby forming a corner of the concrete trough.

3. Formwork according to claim 2, characterized in that a male engagement element is provided on one of the two walls in the outer end region and a female engagement element is provided on the other wall in the outer end region, which interlock in the closed position of the two walls.

4. Formwork according to claim 2, characterized in that the two walls are connected to each other in their outer end regions by means of at least one screw connection (18) or a clamping connection are connected to each other, wherein the screw connection or clamping connection preferably serves to secure the position, and / or wherein the screw connection (18) has a screw (19) with a spring element (23) arranged along at least a part of the screw (19).

5. Formwork according to one of claims 1 to 4, characterized in that the at least one wall is connected to at least two actuators of the drive system for movement between the open and the closed position.

6. Formwork according to one of claims 1 to 5, characterized in that the at least one wall element has two outer end regions and that at least one actuator is provided per end region for moving and holding the wall element.

7. Formwork according to one of claims 1 to 6, characterized in that the drive system can be connected to an external drive at a workstation to drive the drive system.

8. Formwork according to one of claims 1 to 7, characterized in that the drive system is a hydraulic system with at least one hydraulic circuit, wherein the drive system has at least one hydraulic cylinder as an actuator which is connected to the hydraulic circuit.

9. Formwork according to claim 8, characterized in that the hydraulic circuit has a locking element for maintaining the pressure in the hydraulic circuit, preferably a load-bearing valve.

10. Formwork according to claim 8 or 9, characterized in that the hydraulic circuit has an element for compensating for a pressure change and / or a volume change in the hydraulic circuit, preferably being a dummy cylinder or a diaphragm accumulator. 1 1. Formwork according to one of claims 8 to 10, characterized in that the hydraulic circuit has at least one connection element for detachably connecting the hydraulic circuit to a hydraulic unit as an external drive of the drive system at a workstation. 15 12. Formwork according to one of claims 1 to 7, characterized in that the drive system is a mechanical drive as an actuator, preferably a spindle drive.

13. Formwork according to claim 12, characterized in that the mechanical drive is designed to be self-locking or is provided with a locking element.

14. Formwork according to claim 12 or 13, characterized in that the mechanical drive has a connecting element for detachable connection to an external rotary drive, for example a torque screwdriver, as an external drive of the drive system at a workstation.

15. Formwork according to one of claims 1 to 14, characterized in that at least one cover element is provided on the formwork in a pivotable manner, which can be arranged on the top of the concrete trough and at least partially covers the top.

16. Formwork according to claim 15, characterized in that the cover element is pivotable between an open and a closed position with at least one actuator which preferably holds the cover element in the respective position.

17. Formwork according to claim 15 or 16, characterized in that the cover element has a locking element which locks the cover element in a closed position relative to the formwork.

18. Formwork according to claim 17, characterized in that the locking element is pivotable between an open and a closed position with at least one actuator.

19. Formwork according to claim 4, characterized in that the clamping connection has a locking element which is arranged on one of the wall elements and is pivotable between an open and a closed position with at least one actuator.

20. Formwork according to one of claims 16 to 19, characterized in that the respective actuator is connected to the drive system according to one of claims 8 to 14. 16