Standing legs for components of a concrete formwork device, method for connecting components of a concrete formwork device, and method for transporting components.

Abstract

To enable parallel side walls to be installed in a stable state using standing leg.SOLUTION: A standing leg 31 has a main body 32 that is detachably attached to a lower part of a side wall 16 of a concrete formwork device, and a jack rod supported at a tip of the main body 32. The side wall 16 is erected by placing the jack rod on the ground or the like. The main body 32 is divided into a base end member 32a and a tip end member. The standing leg 31 from which a tip end member has been removed is attached to a lower side surface of the side wall 16, and the standing member 51 attached to the beam 17 of the concrete formwork device is connected to the base end member 32a. In this state, the side wall 16 and the beam 17 are in a stably erected state.SELECTED DRAWING: Figure 9

Description

Technical Field

[0001] The present invention relates to a standing leg for erecting a component such as a side wall of a concrete formwork device used for forming the lining concrete of a tunnel, and further relates to a method for connecting components and a method for transporting components using the standing leg.

Background Art

[0002] When providing lining concrete C on the inner peripheral surface of a tunnel T, a concrete formwork device (hereinafter referred to as a formwork device) 10 as shown in FIG. 1 is used. This formwork device 10 is supported on a gantry 11 in a gate shape such that the top form 12, side forms 13, and invert form 14 form an arch shape as a whole. Then, the lining concrete C placed on the inner peripheral surface of the tunnel T is formed by these forms 12, 13, 14.

[0003] The gantry 11 has left and right side walls 16 (members marked with dots in FIG. 1) of the formwork device 10 and a beam member 17 installed between the upper ends of the side walls 16. The beam member 17 is made of H-shaped steel. Support legs 18 located at the four corners of the gantry 所 11 are provided at the lower part of the side wall 16. And the wheels 19 at the lower ends of the support legs 18 are supported on rails R laid on the ground of the tunnel T.

[0004] As shown in FIGS. 2 and 3, when assembling the gantry 11 before assembling the forms 12, 13, 14, first, the left and right side walls 16 are erected on the ground in the tunnel T using a plurality of standing legs 21 and jacks 22.

[0005] In FIG. 3, the jack 22 is shown only on the rear side of the side wall, but in reality, it is also located on the front side. Then, the beam member 17 is installed between the upper ends of the left and right side walls 16. Subsequently, the top form 12 is supported on the beam member 17.

[0006] Next, the jack 22 raises the unit of the side wall 16, beam member 17, and top form 12, and after the raising, the support legs 18 and wheels 19 are positioned at the bottom of the side wall 16. Then, the side form 13 and invert form 14 are supported on the lower side of the top form 12. Note that 16a and 16b shown in Figures 1 and 2 are stays supported on the side wall 16 to receive the beam member 17, and have approximately the same thickness as the beam member 17. The larger stay 16a is folded during transport, etc. Stays 16a and 16b are not shown in drawings other than Figures 1 and 2.

[0007] Here, as shown in Figures 2 and 3, when the side wall 16 is erected on the ground inside the tunnel T, which is its installation surface, the aforementioned upright legs 21 and jacks 22 are used on the lower left and right sides of the side wall 16, as described above. This maintains the side wall 16 in an upright position. [Prior art documents] [Patent Documents]

[0008] [Patent Document 1] Japanese Patent Publication No. 2023-32808 [Overview of the project] [Problems that the invention aims to solve]

[0009] Patent Document 1 discloses that the side wall 16 with the upright legs 21 attached is transported by truck together with the other components of the formwork device 10. In this transport case, it is desirable that the side wall 16 be low in the load in order to keep the side wall 16 in a stable state. [Means for solving the problem]

[0010] The upright leg of the concrete formwork component of the present invention is detachably attached to the lower side surface of an upright component in a concrete formwork device for forming tunnel lining concrete, and in the attached state, it extends so as to protrude from the side surface and has a plate-shaped mounting surface on its lower surface that can be installed on the mounting surface.

[0011] In the above configuration, the lower surface of the upright legs on the lower side of the component can be placed on a mounting surface such as the floor of a truck bed. Therefore, the height of the component when it is in an upright position does not increase. Consequently, the component can be stably installed in an upright position, making it suitable for transportation and other purposes.

[0012] The present invention provides a method for connecting components of a concrete formwork apparatus, characterized in that, with the tip-side member of the upright leg of the concrete formwork apparatus component removed, a connecting member attached to another component arranged alongside the component is connected to the connecting portion of the main body of the upright leg.

[0013] In this way, by connecting the upright legs of the component members to the adjacent connecting members, both component members can be stabilized in a side-by-side configuration. The present invention provides a method for transporting components of a concrete formwork apparatus, characterized in that, with the tip end member of the upright leg of a component of the concrete formwork apparatus removed, a connecting member attached to another component arranged alongside the component is connected to the connecting portion of the main body of the upright leg, and in this state, the components arranged side by side are transported by truck.

[0014] In this way, by connecting the main body of the upright legs of the component to another component such as an adjacent beam, both components can be stabilized in a side-by-side configuration. Therefore, the side-by-side components can be transported in a stable, upright position. [Effects of the Invention]

[0015] According to the present invention, the components of the concrete formwork device can be installed in a stable state by utilizing the upright legs.

Brief Description of the Drawings

[0016] [Figure 1] Cross-sectional view of a tunnel showing a concrete formwork device. [Figure 2] Cross-sectional view of a tunnel showing the state of a concrete formwork device during construction. [Figure 3] Perspective view showing the formwork device during construction. [Figure 4] Perspective view showing the upright leg of the embodiment. [Figure 5] Exploded perspective view showing the upright leg of the embodiment. [Figure 6] Partial exploded perspective view showing the attachment state of the upright leg of the embodiment to the side wall. [Figure 7] Perspective view showing the state of the side walls and beam members arranged side by side loaded on a truck bed. [Figure 8] Perspective view showing the attachment state of the upright leg of the embodiment to the side wall. [Figure 9] Perspective view showing the connection state between the main body of the upright leg and the connecting member. [Figure 10] Perspective view showing the connection state between the connecting member and the beam member by a clamp.

Modes for Carrying Out the Invention

[0017] The upright leg for the constituent members of the concrete formwork device embodying the present invention, the connection method of the constituent members of the concrete formwork device, and the conveyance method of the constituent members will be described according to the drawings. 〈Configuration of the Upright Leg 31〉 The upright leg 31 embodied in this embodiment is configured as follows.

[0018] As shown in Figures 4 to 6, the main body 32 of the upright leg 31 in this embodiment is approximately triangular in shape overall. This main body 32 is divided into a base end member 32a and a short tip end member 32b. The base end member 32a accounts for most of the total length of the upright leg 31. The tip end member 32b is detachable from the base end member 32a. The base end member 32a is made of an H-shaped steel beam with a plate-shaped web We and plate-shaped flanges Hr above and below it. The lower surface of the lower flange Hr forms a mounting surface that allows it to be installed on an installation surface such as the floor of a truck bed TC.

[0019] The base end and tip of the base end member 32a are provided with a base end mounting plate 34 and a tip end mounting plate 35, respectively, each having a bolt insertion hole 33. The tip end mounting plate 35 constitutes a connecting portion that allows the tip end member 32b and the upright member 51, which will be described later, to be connected. The tip end member 32b is provided with a mounting plate 37 that corresponds to the tip end mounting plate 35 of the base end member 32a and also has a bolt insertion hole 33, and a retaining cylinder 38, which are integrally provided. With the tip end mounting plate 35 and the mounting plate 37 stacked on top of each other, the tip end member 32b is connected and fixed to the tip of the base end member 32a by passing a bolt 39 through the bolt insertion hole 33 and tightening a nut (not shown).

[0020] Furthermore, the mounting surfaces (the surfaces that contact the mating surface) of each mounting plate 34, 35, and 37 and the central axis of the retaining cylinder 38 are arranged parallel to each other, and are perpendicular to the lower surface of the lower flange Hr of the main body 32. Therefore, when the mounting surfaces and central axis are perpendicular to the horizontal plane, the lower surface of the flange Hr of the main body 32 is horizontal.

[0021] A jack rod 41 having a threaded surface on its outer circumference is inserted through a retaining cylinder 38 of the tip-side member 32b. The jack rod 41 is held at any vertical position by a positioning member 43, which is made of a female thread and has a handle 42, at the top and bottom of the retaining cylinder 38. Therefore, the vertical position of the jack rod 41 is adjustable. A mounting plate 44, which is installed on a mounting surface such as the ground or the floor of a truck bed TC, is fixed to the lower end of the jack rod 41. Therefore, the height position of the mounting plate 44 is adjusted according to the vertical position of the jack rod 41. The retaining cylinder 38, jack rod 41, mounting plate 44, etc., constitute an installation member supported at the tip of the main body 32.

[0022] <How to use the standing leg 31> As shown in Figures 7 and 8, when transporting the side wall 16 and beam 17, which are components of the formwork device 10, by truck, the tip side member 32b of the upright leg 31 is removed from the base side member 32a. Then, in this removed state, the mounting surfaces of the base side mounting plates 34 of the multiple upright legs 31 are attached to both lower sides of the upright side wall 16 with bolts 39. In this way, when the upright legs 31 are attached to the side wall 16, the base side member 32a of the upright leg 31 protrudes outward from the side of the side wall 16 in a direction perpendicular to that side. Moreover, the lower surface of the lower flange Hr of the base side member 32a is at the same height as the lower surface of the side wall 16. Here, "same height" refers to the positional relationship in which, when the side wall 16 is installed upright on the installation surface such as a truck bed TC, the lower surface of the base side member 32a is installed on the installation surface in the same way as the lower surface of the side wall 16.

[0023] Furthermore, multiple upright members 51, which are connecting members made of elongated steel, are attached to the lower surface of the upright beam member 17. Thus, the upright beam member 17 is placed on the upright members 51. As shown in Figures 9 and 10, the upright members 51 are fixed to the lower flange of the beam member 17 by clamps 52 at the flange-like portion on the upper side of the middle part in the longitudinal direction. Mounting plates 53 having bolt insertion holes (not shown) similar to the bolt insertion holes 33 are provided at the ends of the upright members 51.

[0024] Then, the side wall 16 is loaded onto the truck bed TC such that its longitudinal direction is aligned with the front-to-rear direction of the truck bed TR. The beam 17 to which the upright member 51 is fixed is also loaded onto the truck bed TC so that it is parallel to the side wall 16, that is, so that its longitudinal direction is aligned with the front-to-rear direction of the truck bed TC. In this state, the mounting plate 35 of the upright leg 31 and the mounting plate 53 of the upright member 51 are joined together and fixed with bolts 39 and nuts.

[0025] In this way, the lower surface of the side wall 16 and the lower surface of the lower flange Hr of the upright leg 31 come into contact with the floor of the loading platform TC, causing the side wall 16 to stand upright. Similarly, the beam member 17 also stands upright because the upright member 51, which is made of a long material, comes into contact with the floor of the loading platform TC. As a result, the side wall 16, upright leg 31, and upright member 51, which are connected to each other, collectively constitute a substantially large installation area, so that the side wall 16 and beam member 17 are in a stable loading state on the loading platform TC.

[0026] Therefore, the possibility of the side walls 16 and beam members 17 collapsing is virtually eliminated, allowing for stable transport to and from the tunnel construction site. During transport, i.e., delivery, no uprighting members are provided on the underside of the side walls 16, so the side walls 16 are not pushed up by the uprighting members. Therefore, the height of the side walls 16 does not increase. Consequently, even if the side walls 16 are tall, they can be maintained in a stable state. Furthermore, because the beam members 17 have a narrow vertical width, their upright position is lower than the height of the side walls 16, thus providing stability.

[0027] <Construction and dismantling of formwork device 10> For the construction of the formwork device 10, the side walls 16 and beam members 17, which have been brought to the tunnel construction site, are separated between the upright legs 31 and the upright members 51 by removing the bolts 39 and nuts. Then, the tip side member 32b is connected to the base side member 32a of the upright leg 31, and the vertical position of the installed plate 44 is adjusted by adjusting the vertical position of the jack rod 41. In this state, the side walls 16 are lowered to the assembly position on the ground using a crane (not shown).

[0028] Subsequently, after the beam member 17 is separated from the upright member 51, it is lowered from the loading platform TC using a crane and erected between the upper ends of a pair of side walls 16 installed on the ground. Subsequently, various components such as forms 12, 13, and 14 are assembled on top of beams 17 and the like to construct the formwork device 10. In this state, the lining concrete C is formed.

[0029] The dismantling of the formwork device 10 and its removal from the tunnel T after the concrete lining C has been poured and formed proceeds in almost the reverse order of the construction of the formwork device 10. That is, after the removal of various members such as forms 12, 13, and 14, the upright legs 31 are attached to the side walls 16 prior to the removal of the side walls 16 and beam members 17. Then, the upright members 51 are attached to the beam members 17 that have been lowered from between the upper ends of the side walls 16. After the side walls 16 and beam members 17 are loaded onto the truck bed TC, and the upright legs 31 and upright members 51 are connected in order, they are removed from the tunnel construction site by the truck TR. Note that the attachment of the upright members 51 to the beam members 17 may be done on or off the truck bed TC.

[0030] <Effects of the Embodiment> (1) When the side wall 16 is erected on the truck bed TC, the side wall 16 can be held upright by the bottom surface of the side wall 16 and the bottom surfaces of the main bodies 32 of the upright legs 31 on both lower sides of the side wall 16. Therefore, there is no need to place a stand or anything similar between the bottom surface of the side wall 16 and the truck bed floor surface which is the contact surface of the truck bed TC to erect the side wall 16. Thus, even when the side wall 16 is erected in the truck-loaded state, the cargo can be kept low and avoided becoming high. For this reason, the side wall 16 can be kept stable in the truck-loaded state, especially in the transport and movement state.

[0031] (2) The tip side member 32b of the upright leg 31 can be separated from the main body 32. As a result, the width between the two tips of the upright leg 31 on the side wall 16 when the upright leg 31 is attached can be made narrower compared to when the tip side member 32b and the jack rod 41 are present. Consequently, the upright leg 31 can be loaded in a compact form without occupying a large loading area on the truck bed TC.

[0032] (3) When transporting the side wall 16, the load of the side wall 16 can be supported by a wider area on the lower surface of the main body 32 of the upright leg 31, compared to when the load of the side wall 16 is supported by the mounting plate 44 of the jack rod 41. Therefore, the load on the mounting surface of the truck bed TC or the like that receives the load of the side wall 16 can be reduced, thus avoiding damage or deformation of the mounting surface.

[0033] (4) By connecting the base end member 32a of the main body 32 of the upright leg 31 with the upright member 51 of the beam member 17, a large installation area can be secured overall. This allows the side wall 16 and the beam member 17 to be stabilized in a side-by-side position. Consequently, the side wall 16 and the beam member 17 can be transported stably in an upright position. Furthermore, even if the connection between the upright leg 31 and the upright member 51 is removed, the side wall 16 is maintained in an upright position by the upright leg 31 and the beam member 17 is maintained in an upright position by the upright member 51. When constructing the formwork device 10, by attaching the tip end member 32b having a jack rod 41 to the base end member 32a, the side wall 16 can be lifted by a crane and installed directly at the planned assembly position of the side wall 16. Also, when dismantling the formwork device 10, the upright side wall 16 can be transferred directly from the assembly position to the truck bed TC, and by removing the tip end member 32b, the side wall 16 can be made to stand upright on the truck bed TC. When constructing the formwork device 10, if the upright members 51 are attached to the beam members 17 until they are lifted by a crane, the beam members 17 can be kept upright on the truck bed TC. Then, by releasing the connection with the upright members 51, the beam members 17 can be erected between the upper ends of the side walls 16. Furthermore, when dismantling the formwork device 10, if the beam members 17 on the side walls 16 are placed on the upright members 51 and connected, the beam members 17 can be loaded onto the truck bed TC while maintaining their upright position. Therefore, when constructing and dismantling the formwork device 10, the troublesome work of raising the heavy side walls 16 and beam members 17 from a collapsed state for assembly and lowering them for loading is eliminated. As a result, the working time for dismantling and constructing the formwork device 10 can be shortened.

[0034] (5) When transporting the side walls 16 and beam members 17 of the formwork device 10, the side walls 16 and beam members 17 are stabilized via the main body 32 of the upright legs 31, from which the end-side member 32b has been removed, and the upright member 51 on the beam member 17 side. In contrast, to stabilize the side walls 16 and beam members 17, it is conceivable to provide an uprighting platform on the underside of the side wall 16 instead of the main body 32 of the upright legs 31. In this case, in addition to the upright legs 31 used in the construction of the formwork device 10, an upright member on the side wall 16 side used for transport would be required. This upright member on the side wall 16 side is not used in the construction of the formwork device 10. On the other hand, the upright legs 31, although not used when transporting the formwork device 10, are used in the construction of the formwork device 10 and therefore need to be transported together with the other components. For this reason, in the construction and dismantling of the formwork device 10 and in the transport of the components, it is necessary to handle the upright members that are not used in the construction of the formwork device 10, in addition to the upright legs 31. Consequently, the number of parts handled during the transportation of components increases, leading to greater complexity in parts management.

[0035] (6) By using the upright legs 31, the side walls 16 and beam members 17, which are formed to be long in one direction, can be arranged in parallel and connected. As a result, the side walls 16 and beam members 17 can be loaded in a stable state with their longitudinal direction aligned with the front-to-rear direction of the truck TR, so that the space on the truck bed TC can be effectively utilized for transport.

[0036] (7) When constructing and dismantling the formwork device 10, the side walls 16 and beam members 17, which are handled in a continuous sequence front to back, are connected in a parallel state via the main body 32 and upright members 51 of the upright legs 31. Therefore, the construction and dismantling of the formwork device 10 can be carried out without confusion, and thus its construction and dismantling can be carried out smoothly.

[0037] <Example of changes> The present invention is not limited to the embodiments described above, and can be embodied in the following forms. - In fixing the beam member 17 and the upright member 51, instead of fixing them with clamps 52, the beam member 17 and the upright member 51 are bolted together.

[0038] In addition to the combination of connecting the side wall 16 and the beam member 17 via the upright legs 31, other components of the formwork device 10 may be used, such as the combination of the side wall 16 with scaffolding boards, or the combination of the side wall 16 with the framework of forms 12, 13, and 14.

[0039] - Instead of using the upright member 51 on the beam member 17 side, use the upright leg 31 that is used on the side wall 16 side. - In the main body 32 of the upright leg 31, the dividing point between the base end member 32a and the tip end member 32b is set to an intermediate position or a position on the side wall 16 side in the longitudinal direction of the main body 32.

[0040] - The side wall 16, to which the main body 32 of the upright legs 31 is attached, is installed independently on the mounting surface of a truck bed TC or the like, without connecting the side wall 16 to any other structural member such as a beam 17. - The main body 32 of the upright leg 31 attached to the side wall 16 and the upright member 51 of the beam member 17 are not connected, but the side wall 16 and the upright leg 31 are connected at a position other than the lower part, for example, by a plate or the like installed between the upper surfaces of the side wall 16 and the upright leg 31. [Explanation of symbols]

[0041] 10... Concrete formwork equipment 16...Side wall 17…Beam material 31…Standing leg 32...Main unit 32a... Base end side member 32b…Tip side member 41... Jack rod C... Lining concrete T...Tunnel TR... Truck TC...cargo bed

Claims

1. A concrete formwork device for forming tunnel lining concrete comprises a plate-shaped mounting surface that is detachably attached to the lower side of an upright component, extends to protrude from the side in the attached state, and has a lower surface that can be installed on the mounting surface; a main body that is detachably attached to the lower side of the component; and a jack rod that is detachably supported at the tip of the main body and has a lower end that can be installed on the mounting surface. An upright leg of a concrete formwork device, wherein the main body is divided into a base end member and a tip end member, and a connecting portion is formed at the tip of the base end member, allowing it to be connected to the tip end member and other members, respectively.

2. The upright leg of a component of a concrete formwork apparatus according to claim 1, wherein the surface to be installed is at the same height as the lower surface of the component.

3. A method for connecting components of a concrete formwork apparatus, wherein the tip-side member of the upright leg of the component of the concrete formwork apparatus described in claim 1 is removed, and a connecting member attached to another component arranged alongside the component is connected to the connecting portion of the main body.

4. A method for transporting components of a concrete formwork apparatus, comprising: removing the tip-side member from the upright leg of a component of the concrete formwork apparatus according to claim 1; connecting a connecting member attached to another component arranged alongside the component to the connecting portion of the main body; and transporting the components in this arrangement by truck.

5. A method for transporting components of a concrete formwork apparatus according to claim 4, wherein the connecting member is attached to the lower surface of the other component, and in the attached state, the other component is at a height less than or equal to the height of the component having the upright legs.

6. The method for transporting components of a concrete formwork apparatus according to claim 5, wherein the components are formed to be long in one direction, and the components are loaded onto the truck bed such that their longitudinal direction is aligned with the front-to-rear direction.

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