Erection method of wave shape steel plate in gate type, and erection jig for wave shape steel plate in gate type

Abstract

To provide a an erection method of a wave shape steel plate in a gate type, and an erection jig for the wave shape steel plate in gate type improved in workability.SOLUTION: An erection method of a wave shape steel plate 1 in gate type is a method to erect the wave shape steel plate 1 in gate type using erection jigs 2, comprising: a push-up step of pushing-up the wave shape steel plate 1 in gate shape along a slope to upper ends of an ascending slope 21, 21' in a state an upper plate 12 continuous to a pair of side plates 111, 112 of the wave shape steel plate 1 in gate type opposite and apart to / from each other is placed on a lower end side of the ascending slope 21 (21') where the erection jig 2 is formed in an obliquely upward direction and a pair of projections 131, 132 projecting to each of opposite surfaces of the pair of side plates 111, 112 are brought into contact with the ascending slope 21, 21'; and a pushing-down step of pushing down the wave shape steel plate 1 in gate type rotated around the pair of projections 131, 132 as a rotational shaft such that the upper plate 12 of the wave shape steel plate 1 in gate type is positioned upward and descended from the ascending slope 21, 21'.SELECTED DRAWING: Figure 5

Description

[Technical Field]

[0001] The present invention relates to a method for erecting a portal-shaped corrugated steel plate and an erection jig for the portal-shaped corrugated steel plate. [Background technology]

[0002] Conventionally, portal-shaped corrugated steel plates, including portal-shaped liner plates, have been used to construct tunnel structures such as defensive bunkers and tunnel inner linings (invert strut installation work). A tunnel structure is constructed, for example, by erecting portal-shaped corrugated steel plates one by one in a vertical direction from a horizontal position and joining the erected portal-shaped corrugated steel plates together. Conventional methods for erecting portal-shaped corrugated steel plates include a method of erecting them manually and a method of erecting them mechanically.

[0003] Patent Documents 1 to 3 disclose devices that mechanically erect liner plates. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Laid-Open No. 2014-031685 [Patent Document 2] Japanese Patent Application Laid-Open No. 2015-098710 [Patent Document 3] Japanese Patent Application Laid-Open No. 2015-108257 Summary of the Invention [Problem to be solved by the invention]

[0005] The equipment disclosed in Patent Documents 1 to 3 allows the liner plate to be mechanically erected from a lying state, and the erected liner plate on the assembly side can be easily adjusted in position and attitude relative to the existing liner plate. However, the equipment disclosed in Patent Documents 1 to 3 requires large-scale construction using heavy machinery, which raises concerns that the construction speed for erecting the liner plate cannot be improved, and there is a problem in that it cannot respond to the need to speed up the construction of tunnel structures, and therefore construction efficiency cannot be improved.

[0006] The present invention was devised in consideration of the above-mentioned problems, and its object is to provide a method for erecting a gate-shaped corrugated steel plate and an erection jig for a gate-shaped corrugated steel plate that improves workability. [Means for solving the problem]

[0007] The method for erecting a gate-shaped corrugated steel plate in the first invention is a method for erecting a gate-shaped corrugated steel plate using an erection jig, and is characterized by comprising: a pushing-up process in which an upper plate of the gate-shaped corrugated steel plate, which is continuous with a pair of side plates that are opposite and spaced apart from each other, is placed at the lower end of an upward slope portion of the erection jig that is formed with an obliquely upward slope, and a pair of protrusions protruding from the opposing surfaces of each of the pair of side plates are brought into contact with the upward slope portion, and the gate-shaped corrugated steel plate is pushed up along the slope to the upper end of the upward slope portion; and a lowering process in which, after the pushing-up process, the gate-shaped corrugated steel plate is rotated around the pair of protrusions as rotation axes so that the upper plate is at the top and is lowered from the upward slope portion.

[0008] The method for erecting a portal-shaped corrugated steel plate in the second invention is characterized in that, in the first invention, the pushing-up process involves pushing up the portal-shaped corrugated steel plate along the incline while bringing a rotating roller provided on one of the pair of protrusions and the upward inclined portion into contact with the other.

[0009] The third invention is a method for erecting a portal-shaped corrugated steel plate, which is the same as the first invention, and is characterized in that the lowering process involves horizontally moving the erection jig, which has wheels on its bottom, together with the portal-shaped corrugated steel plate.

[0010] The method for erecting a portal-shaped corrugated steel plate in the fourth invention is characterized in that, in any of the first to third inventions, the lowering process lowers the portal-shaped corrugated steel plate onto a pillow material that has been laid in advance and extended in a horizontal direction.

[0011] The erection jig for a portal-shaped corrugated steel plate in the fifth invention is an erection jig for a portal-shaped corrugated steel plate used in the erection method for a portal-shaped corrugated steel plate described in the first invention, characterized in that it comprises an upward inclined portion in which the inclination is formed diagonally upward and the portal-shaped corrugated steel plate is pushed up to its upper end along the inclination with the pair of protrusions in contact, and a descending portion extending horizontally or downward from the upper end of the upward inclined portion and causing the portal-shaped corrugated steel plate to descend from the upward inclined portion. [Effects of the Invention]

[0012] According to the first to fourth inventions, the method for erecting a portal-shaped corrugated steel plate includes a pushing-up step of pushing the portal-shaped corrugated steel plate up along the inclination of the upward inclined portion to the upper end of the upward inclined portion with a pair of protrusions in contact with the upward inclined portion, and a lowering step of rotating the portal-shaped corrugated steel plate about the pair of protrusions as a rotation axis so that the upper plate is facing upward and lowering it from the upward inclined portion. This allows the portal-shaped corrugated steel plate to be erected quickly by hand without using heavy machinery. This improves the ease of erecting the portal-shaped corrugated steel plate.

[0013] In particular, according to the second aspect of the present invention, in the pushing-up step, the portal-shaped corrugated steel plate is pushed up along the slope while a rotating roller provided on one of the pair of protrusions and the upwardly inclined portion is brought into contact with the other. This reduces friction between the pair of protrusions and the upwardly inclined portion, allowing the portal-shaped corrugated steel plate to be erected more quickly by hand. This further improves the ease of erecting the portal-shaped corrugated steel plate.

[0014] In particular, according to the third aspect of the present invention, the lowering step involves horizontally moving an erection jig with wheels at the bottom together with the portal corrugated steel plate. This allows the erected portal corrugated steel plate to be easily assembled to the existing portal corrugated steel plate. This further improves the ease of erecting the portal corrugated steel plate.

[0015] In particular, according to the fourth aspect of the present invention, in the lowering step, the portal corrugated steel plate is erected on a bolster that has been laid in advance and extended in the horizontal direction. Therefore, the erected portal corrugated steel plate can be lowered to the same height as the existing portal corrugated steel plate and easily assembled. This further improves the ease of erecting the portal corrugated steel plate.

[0016] According to the fifth aspect of the present invention, an upwardly inclined portion is formed, along which the portal-shaped corrugated steel sheet is pushed up to its upper end, and a downwardly extending portion is formed from the upper end of the upwardly inclined portion in the horizontal direction or downwardly, and the portal-shaped corrugated steel sheet is lowered from the upwardly inclined portion. This allows the portal-shaped corrugated steel sheet to be erected quickly by hand without using heavy machinery, thereby improving the ease of erecting the portal-shaped corrugated steel sheet. [Brief explanation of the drawings]

[0017] [Figure 1] 1(a) and 1(b) are schematic diagrams showing an example of an erection jig for a portal-shaped corrugated steel plate in this embodiment, with FIG. 1(a) being a front view and FIG. 1(b) being a side view. [Figure 2] FIG. 2 is a schematic perspective view showing an example of an erection jig for a portal-shaped corrugated steel plate according to this embodiment. [Figure 3] FIG. 3 is a schematic front view showing an example of an erection jig for a portal-shaped corrugated steel plate in this embodiment. [Figure 4] FIG. 4 is a schematic perspective view showing an example of a method for erecting a portal-shaped corrugated steel plate in this embodiment. [Figure 5] FIG. 5 is a schematic perspective view showing an example of a method for erecting a portal-shaped corrugated steel plate in this embodiment. [Figure 6]FIG. 6 is a schematic perspective view showing an example of a method for erecting a portal-shaped corrugated steel plate in this embodiment. [Figure 7] FIG. 7 is a schematic perspective view showing an example of a method for erecting a portal-shaped corrugated steel plate in this embodiment. [Figure 8] FIG. 8 is a schematic perspective view showing an example of a method for erecting a portal-shaped corrugated steel plate in this embodiment. [Figure 9] FIG. 9 is a schematic perspective view showing an example of a method for erecting a portal-shaped corrugated steel plate in this embodiment. [Figure 10] 10(a) to 10(d) are schematic side views showing a first modified example of the method for erecting a portal-shaped corrugated steel plate in this embodiment. [Figure 11] 11(a) to 11(c) are schematic side views showing a second modified example of the method for erecting a portal-shaped corrugated steel plate in this embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0018] Hereinafter, a method for erecting a portal-shaped corrugated steel sheet 1 and an example of an erection jig 2 for the portal-shaped corrugated steel sheet 1 according to an embodiment of the present invention will be described in detail with reference to the drawings. In each drawing, a first horizontal direction X is defined, one direction perpendicular to the first horizontal direction X is defined as a second horizontal direction Y, and a direction perpendicular to each of the first horizontal direction X and the second horizontal direction Y is defined as a vertical direction Z. The configurations in each drawing are shown schematically for the purpose of explanation, and for example, the size of each component and the comparison of sizes between components may differ from those shown in the drawings.

[0019] (Method of erecting the portal-shaped corrugated steel plate 1) An example of a method for erecting the portal-shaped corrugated steel plate 1 in this embodiment will be described with reference to the drawings.

[0020] First, we will explain the portal-shaped corrugated steel plate 1 and the erection jig 2 used in the erection method of the portal-shaped corrugated steel plate 1. In the erection method of the portal-shaped corrugated steel plate 1, in addition to the portal-shaped corrugated steel plate 1 and the erection jig 2, a bolster member 3 may also be used.

[0021] <Gate type corrugated steel plate 1> The portal-shaped corrugated steel plate 1 is a steel plate with a corrugated surface that is used for constructing tunnel structures such as bunkers and tunnel inner linings. As the portal-shaped corrugated steel plate 1, a steel liner plate, a corrugated steel plate, or the like is used.

[0022] As shown in Fig. 1(a) and Fig. 1(b), for example, the portal-shaped corrugated steel plate 1 comprises a pair of side plates 11, an upper plate 12, and a pair of protrusions 13. Fig. 1(a) is a front view of the portal-shaped corrugated steel plate 1, and Fig. 1(b) is a side view of the portal-shaped corrugated steel plate 1. The portal-shaped corrugated steel plate 1 may be made up of a single continuous steel liner plate, corrugated steel plate, etc., or may be made up of a plurality of independent steel liner plates, corrugated steel plates, etc., joined by welding or bolts.

[0023] The portal-shaped corrugated steel plate 1 is, for example, portal-shaped, as shown in FIG. 1(a). Here, the portal shape includes shapes such as a U-shape, an inverted U-shape, a horseshoe shape, an arch shape, and a semicircular shape when viewed from the front. The portal-shaped corrugated steel plate 1 includes a pair of steel plate bodies 10, 10' and a reinforcing ring 101, as shown in FIG. 1(b), for example. The portal-shaped corrugated steel plate 1 is constructed, for example, by connecting the pair of portal-shaped steel plate bodies 10, 10' to the portal-shaped reinforcing ring 101 with bolts. The reinforcing ring 101 is made of, for example, a known steel material, and an H-beam or the like may be used.

[0024] <> The pair of side plates 11 face each other and are spaced apart from each other. The pair of side plates 11 extend in one direction, for example, and extend in the vertical direction Z when the portal corrugated steel plate 1 is installed upright.

[0025] The pair of side plates 11 includes, for example, a side plate 111 and a side plate 112. For example, one end of the side plate 111 of the pair of side plates 11 is continuous with the upper plate 12, and the other end serves as an installation surface. For example, one end of the side plate 112 of the pair of side plates 11 is continuous with the upper plate 12, and the other end serves as an installation surface.

[0026] The pair of side plates 11 includes side plate portions of the steel plate bodies 10 and 10 ′ and a reinforcing ring 101 .

[0027] <<Upper Panel 12>> The upper plate 12 is continuous with the pair of side plates 11. The upper plate 12 extends, for example, in one direction, and when the portal-shaped corrugated steel plate 1 is installed upright, it extends in a horizontal direction (a planar direction including a first horizontal direction X and a second horizontal direction Y) perpendicular to the vertical direction Z. The upper plate 12 may extend, for example, in one direction and have a curved shape bulging in another direction.

[0028] The upper plate 12 includes upper plate portions of the steel plate bodies 10 and 10 ′ and the reinforcing ring 101 .

[0029] <<Pair of protrusions 13>> The pair of protrusions 13 are respectively provided on the opposing surfaces of the pair of side plates 11. The pair of protrusions 13 extend, for example, in one direction, and when the portal-shaped corrugated steel plate 1 is installed upright, they extend in a horizontal direction perpendicular to the vertical direction Z.

[0030] In the method for erecting the portal-shaped corrugated steel sheet 1, the portal-shaped corrugated steel sheet 1 is pushed up to the upper end of the upwardly inclined portion 21 with the pair of protrusions 13 in contact with the upwardly inclined portion 21. Here, the pair of protrusions 13 may have, for example, rotating rollers (not shown). As the rotating rollers, for example, known rotatable rollers are used.

[0031] That is, the portal-shaped corrugated steel plate 1 is pushed up along the slope with the rotating rollers of the pair of protrusions 13 in contact with the upwardly inclined portion 21. In this case, friction between the pair of protrusions 13 and the upwardly inclined portion 21 is reduced, and the portal-shaped corrugated steel plate 1 can be erected more quickly by hand. This further improves the ease of erecting the portal-shaped corrugated steel plate 1.

[0032] The pair of protrusions 13 includes, for example, a protrusion 131 and a protrusion 132. For example, the pair of protrusions 13 includes the protrusion 131 protruding from the inner surface of the side plate 111, and the protrusion 132 protruding from the inner surface of the side plate 112.

[0033] The pair of protrusions 13 are protrudingly provided, for example, at the center of gravity of the portal corrugated steel plate 1. In other words, the force required to erect the portal corrugated steel plate 1 is significantly reduced compared to when the pair of protrusions 13 are protrudingly provided at a position shifted from the center of gravity. This allows the portal corrugated steel plate 1 to be easily rotated and erected. Furthermore, the number of personnel required for erection can be reduced. This further improves the ease of erecting the portal corrugated steel plate 1.

[0034] The pair of protrusions 13 may be provided to protrude from the side plate portions of the steel plate bodies 10 and 10 ′, or may be provided to protrude from the side plate portions of the reinforcing ring 101 , for example.

[0035] <Upright jig 2> The erection jig 2 is a jig for erecting the portal-shaped corrugated steel plate 1. The erection jig 2 is made of, for example, a steel material with high rigidity.

[0036] As shown in Fig. 2, the erection jig 2 has an upwardly inclined portion 21, along which the portal-shaped corrugated steel plate 1 is pushed up to its upper end, and a downwardly extending portion 22 extending horizontally or downwardly from the upper end of the upwardly inclined portion 21, for lowering the portal-shaped corrugated steel plate 1 from the upwardly inclined portion 21. In this case, the portal-shaped corrugated steel plate 1 can be erected quickly by hand without using heavy machinery. This improves the ease of erecting the portal-shaped corrugated steel plate 1.

[0037] Here, "diagonally upward" refers to a diagonally upward direction relative to the horizontal direction and does not include a vertically upward direction, and "downward" refers to a diagonally downward direction relative to the horizontal direction and also includes a vertically downward direction.

[0038] When the erection jig 2 is used, the erection method of the portal corrugated steel plate 1 does not require the operation of heavy machinery, which was previously necessary, and therefore the portal corrugated steel plate 1 can be erected quickly in an emergency. Furthermore, because heavy machinery is not required, the portal corrugated steel plate 1 can be erected even in a narrow space where heavy machinery cannot be brought in or in an environment where fuel is limited. In these respects as well, the ease of erecting the portal corrugated steel plate 1 can be improved.

[0039] The erection jig 2 may further include, for example, a temporary placement portion 23, a connection portion 24, wheels 25, and a guide 26.

[0040] The erection jig 2 is configured by connecting, via a connecting portion 24, one flat plate-shaped member having, for example, an upward inclined portion 21, a downward inclined portion 22, and a temporary placing portion 23, to another flat plate-shaped member having, for example, an upward inclined portion 21' corresponding to the upward inclined portion 21, a downward inclined portion 22' corresponding to the downward inclined portion 22, and a temporary placing portion 23' corresponding to the temporary placing portion 23. In this case, the one member and the other member have, for example, a polygonal shape in side view, including a trapezoidal or triangular shape. Note that the upward inclined portion 21', the downward inclined portion 22', and the temporary placing portion 23' have the same shape, material, and function as the upward inclined portion 21, the downward inclined portion 22, and the temporary placing portion 23, respectively, and therefore description thereof will be omitted.

[0041] In the erection jig 2, for example, the portion corresponding to the one member and the portion corresponding to the other member may be respectively constituted by one side plate and the other side plate of a hollow pillar, or may be respectively constituted by one side surface and the other side surface of a solid pillar. In the erection jig 2, for example, when the shapes of the one member and the other member are trapezoidal in side view, the pillar is a hollow or solid quadrangular pillar, and when the shapes of the one member and the other member are triangular in side view, the pillar is a hollow or solid triangular pillar.

[0042] <<Uphill section 21>> The upwardly inclined portion 21 is formed with an inclination that slopes obliquely upward. With the pair of protrusions 13 in contact with each other, the gate-shaped corrugated steel plate 1 is pushed up to the upper end along the inclination of the upwardly inclined portion 21. The angle of inclination of the upwardly inclined portion 21 is, for example, 30° to 45° with respect to the horizontal direction.

[0043] The upwardly inclined portion 21 may have, for example, a rotating roller (not shown) on the inclined surface. That is, the portal corrugated steel plate 1 is pushed up along the slope with the pair of protrusions 13 in contact with the rotating roller of the upwardly inclined portion 21. In this case, friction between the pair of protrusions 13 and the upwardly inclined portion 21 is reduced, and the portal corrugated steel plate 1 can be erected more quickly by hand. This further improves the ease of erecting the portal corrugated steel plate 1. As the rotating roller, for example, a known rotatable roller is used.

[0044] <<Descent section 22>> The descending portion 22 extends horizontally or downward from the upper end of the upwardly inclined portion 21. The descending portion 22 descends the portal corrugated steel plate 1 from the upwardly inclined portion 21. When the portal corrugated steel plate 1 is descended from the upwardly inclined portion 21, the descending portion 22 may descend by sliding the surface while in contact with the pair of protrusions 13 of the portal corrugated steel plate 1, or may descend by free falling without contact.

[0045] The descending section 22 includes, for example, a mounting section 221, a downwardly inclined section 222, and a vertical section 223. The descending section 22 may include, for example, at least one of the mounting section 221, the downwardly inclined section 222, and the vertical section 223. Note that the mounting section 221', the downwardly inclined section 222', and the vertical section 223' of the descending section 22' have the same shapes, materials, and functions as the mounting section 221, the downwardly inclined section 222, and the vertical section 223, respectively, and therefore description thereof will be omitted.

[0046] In this embodiment, an example will be described in which the descending section 22 extends continuously from the upper end of the upwardly inclined section 21 in the order of the mounting section 221, the downwardly inclined section 222, and the vertical section 223, but is not limited to this order and combination. For example, the descending section 22 may extend from the upper end of the upwardly inclined section 21 at least one of the mounting section 221, the downwardly inclined section 222, and the vertical section 223 in any combination and order, and may include at least one of them in plural.

[0047] The descending section 22 may have a plurality of placing sections 221 so as to have a stepped shape when viewed from the side. In this case, even if the portal-shaped corrugated steel plate 1 unintentionally falls from one placing section 221, it can be placed on another placing section 221, thereby reducing the risk of injury to workers. This further improves the safety of erecting the portal-shaped corrugated steel plate 1.

[0048] <<Placement section 221>> The placing portion 221 extends, for example, from the upper end of the upwardly inclined portion 21 in the horizontal direction.

[0049] The placing portion 221 has, for example, a pair of protrusions 13 placed on its surface. In this case, the portal-shaped corrugated steel plate 1 can be easily rotated on the horizontal placing portion 221 and erected from a lying state. Furthermore, since the portal-shaped corrugated steel plate 1 is supported by the placing portion 221, there is no need for manual force to support it upward, and therefore the number of personnel required for erection can be reduced. This further improves the ease of erecting the portal-shaped corrugated steel plate 1.

[0050] The placing portion 221 may extend in the same direction as the extending direction of the upwardly inclined portion 21 in a plan view (the second horizontal direction Y in FIG. 2). In this case, it is easy to erect a plurality of portal-shaped corrugated steel plates 1 in an aligned manner. This further improves the workability of erecting the portal-shaped corrugated steel plates 1 and constructing the tunnel structure.

[0051] <<Downward Inclined Section 222>> The downwardly inclined portion 222 extends obliquely downward from the end of the placement portion 221, for example.

[0052] The downwardly inclined portion 222 allows the portal corrugated steel plate 1 to descend along the incline with the pair of protrusions 13 in contact with the surface, for example. In this case, it is possible to reduce the risk of the portal corrugated steel plate 1 unintentionally falling from the upwardly inclined portion 21 and injuring a worker. This makes it possible to further improve safety when erecting the portal corrugated steel plate 1.

[0053] The downwardly inclined portion 222 may extend in the same direction as the upwardly inclined portion 21 in plan view (the second horizontal direction Y in FIG. 2). In this case, it is easy to erect a plurality of portal corrugated steel plates 1 in alignment with one another. This further improves the ease of erecting the portal corrugated steel plates 1 and constructing the tunnel structure.

[0054] <<Vertical section 223>> The vertical portion 223 extends vertically downward from the end of the downwardly inclined portion 222. The vertical portion 223 allows the portal corrugated steel plate 1 to freely fall downward with the surface thereof separated from the pair of protrusions 13, for example.

[0055] <<Temporary placement section 23>> The temporary placement section 23 extends, for example, from the lower end of the upwardly inclined section 21 in the horizontal direction.

[0056] For example, a pair of protrusions 13 is placed on the surface of the temporary resting portion 23. In this case, it is easy to push up the portal-shaped corrugated steel plate 1 with momentum from the horizontal surface of the temporary resting portion 23 toward the slope of the upward slope portion 21. This further improves the workability of erecting the portal-shaped corrugated steel plate 1.

[0057] <<Connection 24>> The connecting portion 24 connects, for example, one flat plate-shaped member having the upward inclined portion 21, the downward inclined portion 22, and the temporary placement portion 23, to the other flat plate-shaped member having the upward inclined portion 21', the downward inclined portion 22', and the temporary placement portion 23'. The connecting portion 24 is, for example, a rod-shaped or plate-shaped member extending in one direction.

[0058] <<wheels 25>> Wheels 25 are provided at the bottom of the erection jig 2. For example, known casters are used as the wheels 25. In other words, the erection jig 2 can be freely moved horizontally together with the portal corrugated steel plate 1 by rotating the wheels 25. In this case, the erected portal corrugated steel plate 1 can be easily assembled to an existing portal corrugated steel plate. This further improves the ease of erecting the portal corrugated steel plate 1.

[0059] <<Guide 26>> The guide 26 is provided at the bottom of the erection jig 2. The guide 26 is, for example, an L-shaped steel that is fitted into the flange of the H-shaped steel bolster 3 so that the wheels 25 do not come off the surface of the bolster 3, as shown in FIG. 3 , and guides the wheels 25 along the extension direction of the bolster 3. In this case, the erected portal corrugated steel plate 1 can be easily erected on the bolster 3. This further improves the ease of erecting the portal corrugated steel plate 1.

[0060] <Pillow material 3> The bolster 3 is a member used, for example, at the bottom of a tunnel structure, to ensure the flatness of the construction site of the tunnel structure. The bolster 3 is made, for example, of a highly rigid steel material. The bolster 3 is made, for example, by combining a plurality of H-shaped steel beams, as shown in Figs. 2 and 3.

[0061] The bolster 3 is extended, for example, in a horizontal direction, and one or more portal-shaped corrugated steel plates 1 are erected on the upper surface. In this case, the erected portal-shaped corrugated steel plates 1 can be lowered to the same height as the existing portal-shaped corrugated steel plates and easily assembled. This further improves the ease of erecting the portal-shaped corrugated steel plates 1.

[0062] The pillow material 3 has, for example, a pair of rail portions 31, 31' and a rail connecting portion 32. The pair of rail portions 31, 31' are extended, for example, in the second horizontal direction Y, and are connected to each other via the rail connecting portion 32 extended in the first horizontal direction X.

[0063] Next, a method for erecting the portal-shaped corrugated steel plate 1 will be described in detail with reference to the drawings. The method for erecting the portal-shaped corrugated steel plate 1 includes a preparation step, a push-up step, and a lowering step. In this embodiment, an example will be described in which a worker erects a plurality of portal-shaped corrugated steel plates 1 along the second horizontal direction Y to construct a tunnel structure.

[0064] <Preparation process> First, as shown in FIG. 4, for example, a worker prepares a gate-shaped corrugated steel plate 1 lying on its side at a planned installation location, and an installation jig 2.

[0065] Here, the worker may lay the bolster 3 for erecting the portal-shaped corrugated steel plate 1 above in advance so that it extends in the second horizontal direction Y. In other words, the bolster 3 makes it easy to ensure a flat base for erecting the portal-shaped corrugated steel plate 1. In this case, the erected portal-shaped corrugated steel plate 1 can be lowered to the same height as the existing portal-shaped corrugated steel plate and easily assembled. This further improves the ease of erecting the portal-shaped corrugated steel plate 1.

[0066] If the ground at the planned installation location is poor, a work platform 4 may be laid in advance on the extension of the bolster 3. In this case, it is possible to prevent the portal-shaped corrugated steel plate 1 from coming into contact with the ground and becoming soiled, and to prevent accidents such as workers accidentally dropping the portal-shaped corrugated steel plate 1 when gripping or pushing it up. This improves the workability of erecting the portal-shaped corrugated steel plate 1 and constructing the tunnel structure. For example, the "N Column Mat" manufactured by Nippon Steel Construction Materials Co., Ltd. may be used as the work platform 4.

[0067] <Pushing up process> Next, as shown in Fig. 5 , for example, the worker lifts the pair of side plates 11 with the upper plate 12 of the gate-shaped corrugated steel plate 1 in contact with the lower end side of the upwardly inclined portion 21, and places the pair of protrusions 13 on the upwardly inclined portion 21 of the erection jig 2. At this time, the gate-shaped corrugated steel plate 1 is in a state where the upper plate 12 is disposed on the lower end side of the upwardly inclined portion 21 and the pair of protrusions 13 are in contact with the upwardly inclined portion 21.

[0068] Here, the worker may place the pair of protrusions 13 on the temporary resting portion 23 of the erection jig 2. In this case, in the pushing-up process described below, it is easy to push up the portal-shaped corrugated steel plate 1 by applying momentum from the surface of the horizontal temporary resting portion 23 toward the slope of the upward slope portion 21. This can further improve the ease of erecting the portal-shaped corrugated steel plate 1.

[0069] Next, the worker, for example, positions the upper plate 12 on the lower end side of the upward inclined portion 21 and brings the pair of protrusions 13 into contact with the upward inclined portion 21, and then pushes the gate-shaped corrugated steel plate 1 up to the upper end along the slope of the upward inclined portion 21.

[0070] At this time, the worker may push up the portal-shaped corrugated steel plate 1 along the incline while bringing the rotating rollers provided on one of the pair of protrusions 13 and the inclination of the upward inclined portion 21 into contact with the other. In this case, friction between the pair of protrusions 13 and the upward inclined portion 21 is reduced, and the portal-shaped corrugated steel plate 1 can be erected more quickly by hand. This further improves the ease of erecting the portal-shaped corrugated steel plate 1.

[0071] <Descent process> When using the erection jig 2 having the placing portion 221, after the pushing-up step, the worker pushes the pair of protrusions 13 from the upper end of the upwardly inclined portion 21 to the placing portion 221 extending horizontally, as shown in Fig. 6 for example. At this time, the pair of protrusions 13 are placed on the placing portion 221.

[0072] Next, after the pushing-up step, as shown in Figs. 6 and 7, for example, the worker rotates the portal corrugated steel plate 1 in the rotation direction R around the pair of protrusions 13 as the rotation axis so that the upper plate 12 faces upward, and then lowers it from the upwardly inclined portion 21 as shown in Figs. 8 and 9. In this case, the portal corrugated steel plate 1 can be erected quickly by hand without using heavy machinery. This improves the ease of erecting the portal corrugated steel plate 1. The worker may lower the portal corrugated steel plate 1 onto the ground to erect it, or, if a bolster 3 is used, may lower the portal corrugated steel plate 1 onto the bolster 3 to erect it.

[0073] Furthermore, in the conventional erection method that does not use the erection jig 2, it was necessary to erect the portal-shaped corrugated steel plate 1 by lifting it upward using the bottom of the portal-shaped corrugated steel plate 1 as a fulcrum. However, according to this embodiment, the portal-shaped corrugated steel plate 1 can be more easily rotated and erected by using the pair of projections 13 of the portal-shaped corrugated steel plate 1 as a fulcrum to lift the top plate 12 of the pair of side plates 11 upward and push down the bottom sides of the pair of side plates 11. Furthermore, since the worker uses both hands to lift the top plate 12 and push down the bottom side, the number of workers required for erection can be reduced. This further improves the ease of erecting the portal-shaped corrugated steel plate 1.

[0074] 7 and 8, the worker may horizontally move the erection jig 2 provided with wheels 25 together with the portal corrugated steel plate 1. Here, the portal corrugated steel plate 1 follows the horizontal movement of the erection jig 2 toward the front F1 because, for example, the pair of protrusions 13 are placed on the placement portion 221. In this case, the erected portal corrugated steel plate 1 can be easily assembled to the existing portal corrugated steel plate. This further improves the ease of erecting the portal corrugated steel plate 1.

[0075] When using a bolster 3 having a pair of rail portions 31, 31', the worker may horizontally move the erection jig 2 together with the portal corrugated steel plate 1, with the extension direction of the pair of rail portions 31, 31' being the forward F1 and backward F2 operating directions of the erection jig 2. In this case, the erection jig 2 can be moved horizontally stably, and the erected portal corrugated steel plate 1 can be more easily assembled to the existing portal corrugated steel plate. This further improves the ease of erecting the portal corrugated steel plate 1.

[0076] By the above procedure, the method for erecting the portal-shaped corrugated steel plate 1 is completed.

[0077] In addition, after the worker lowers and erects the portal-shaped corrugated steel plate 1, as shown in Figure 9, for example, he moves the erection jig 2 horizontally backward F2 to return the portal-shaped corrugated steel plate 1 to the location where it was placed in a lying state, and then prepares to erect a new portal-shaped corrugated steel plate 1 in a lying state.

[0078] The construction of the tunnel structure is completed by repeating the above steps to erect and assemble multiple portal corrugated steel plates 1. When assembling multiple portal corrugated steel plates 1, the multiple portal corrugated steel plates 1 may be joined to each other using known steel clips, bolts, etc.

[0079] The tunnel structure may further include end portions (not shown) in addition to the portal corrugated steel plate 1 and the bolster 3. As the end portions, for example, known lightweight steel sheet piles may be used.

[0080] The tunnel structure may also be constructed by bolting together the bolster 3 extending in one direction and the upright portal-shaped corrugated steel plate 1. In this case, the level of the bottom of the tunnel structure can be easily adjusted by adjusting the degree of fastening of the bolts. This further improves the ease of erecting the portal-shaped corrugated steel plate 1.

[0081] Furthermore, the erection jig 2 may be configured such that each of its components, such as the upward inclined portion 21, downward portion 22, temporary placement portion 23, connection portion 24, wheels 25, and guide 26, is joined by a joining means such as a disassembling bolt. In this case, the erection jig 2 can be brought into a wider variety of locations. This improves the convenience of erecting the portal-shaped corrugated steel plate 1.

[0082] Furthermore, the bolster 3 may have a steel plate, earth and sand, grout material, or the like, attached to the bottom thereof. In this case, unevenness of the bolster 3 can be easily adjusted. This further improves the ease of erecting the portal-shaped corrugated steel plate structure 1.

[0083] (First modified example of the method for erecting the portal-shaped corrugated steel plate 1) 10(a) to 10(d), the erection jig 2 may further have a recessed portion 221a recessed downward on the mounting portion 221. The erection jig 2 may also have a recessed portion (not shown) recessed downward on the mounting portion 221′.

[0084] When using an erection jig 2 having a recessed portion 221a, the worker pushes up the gate-shaped corrugated steel plate 1 along the slope of the upward slope portion 21 to the upper end of the upward slope portion 21 while keeping a pair of protrusions 13 in contact with the slope of the upward slope portion 21 during the pushing-up process, as shown in Figure 10(a), for example.

[0085] Thereafter, in the lowering step, as shown in, for example, Figures 10(b) to 10(c), the worker rotates the portal corrugated steel plate 1 in the rotation direction R around the pair of protrusions 13 as the rotation axis so that the upper plate 12 faces upward, with the protrusions 131 (pair of protrusions 13) fitted into the recessed portions 221a, and then, as shown in, for example, Figure 10(d), moves it horizontally forward F1 to lower it from the upwardly inclined portion 21. In this case, it is possible to prevent the pair of protrusions 13 from coming off the mounting portion 221 before the rotation of the portal corrugated steel plate 1 is completed, which would cause the portal corrugated steel plate 1 to tip over. This improves the safety of erecting the portal corrugated steel plate 1.

[0086] 10(a) to 10(d), the erection jig 2 may further include a locking portion 27 protruding from the side surface of one of the flat plate-shaped members having an upwardly inclined portion 21 and a downwardly inclined portion 22. The locking portion 27 is arranged in the rotation direction R of the portal corrugated steel plate 1. The locking portion 27 is, for example, a rod-shaped or bulging surface protruding in the first horizontal direction X from the upwardly inclined portion 21, the placing portion 221, or the downwardly inclined portion 222. The locking portion 27 may be made of the same material as the one of the members.

[0087] The erection jig 2 may also have a protruding locking portion (not shown) on the side surface of the other member having a flat plate shape with an upward inclined portion 21′ and a downward inclined portion 22′. The locking portion 27 may be formed, for example, by a connecting portion 24 that connects the one member and the other member.

[0088] The locking portion 27 is provided, for example, below the upper end of the upwardly inclined portion 21. The locking portion 27 is provided, for example, below the placement portion 221. The locking portion 27 is provided, for example, below the upper end of the downwardly inclined portion 222.

[0089] When using an erection jig 2 equipped with a locking portion 27, the worker pushes up the gate-shaped corrugated steel plate 1 along the slope to the upper end of the upward slope portion 21 while keeping a pair of protrusions 13 in contact with the slope of the upward slope portion 21 during the pushing-up process, as shown in Figure 10(a), for example.

[0090] 10(b) and 10(c), in the lowering step, the worker rotates the portal-shaped corrugated steel plate 1 in the rotation direction R around the pair of protrusions 13 as the rotation axis so that the top plate 12 faces upward, and engages the side plates 111 (the pair of side plates 11) with the engaging portions 27 protruding in the rotation direction R. Then, as shown in FIG. 10(d), the worker horizontally moves the portal-shaped corrugated steel plate 1 forward F1 and lowers it from the upwardly inclined portion 21. That is, when the top plate 12 faces upward, the side plates 111 are engaged with the engaging portions 27 so as not to rotate any further in the rotation direction R. In this case, the top plate 12 of the portal-shaped corrugated steel plate 1 can be easily aligned upward. This further improves the ease of erecting the portal-shaped corrugated steel plate 1.

[0091] (Second modified example of the method for erecting the portal-shaped corrugated steel plate 1) 11(a) to 11(c), the erection jig 2 may include a descending portion 22 that does not have a placing portion 221 or a downwardly inclined portion 222, but only has a vertical portion 223. In this case, the erection jig 2 has, for example, a right-angled triangular shape in a side view.

[0092] When using an erection jig 2 having a descending portion 22 having only a vertical portion 223, the worker pushes up the gate-shaped corrugated steel plate 1 along the slope of the upward slope portion 21 during the pushing-up process, with the pair of protrusions 13 in contact with the slope of the upward slope portion 21, as shown in Figure 11(a), for example.

[0093] 11(b) to 11(c), in the lowering step, the worker rotates the portal corrugated steel plate 1 in the rotation direction R about the pair of protrusions 13 as the rotation axis so that the upper plate 12 faces upward, while moving it horizontally forward F1 to lower it from the upward inclined portion 21. In this case, the number of components of the erection jig 2 can be reduced compared to when the erection jig 2 is provided with the placement portion 221 and the downward inclined portion 222. This can improve the manageability of the erection jig 2.

[0094] Moreover, the descending section 22 only has a vertical section 223 that extends vertically downward from the upper end of the upwardly inclined section 21. Therefore, the space that the descending section 22 occupies in the horizontal direction is reduced compared to when the descending section 22 has both the placing section 221 and the downwardly inclined section 222, and the size can be reduced. This improves the convenience of the erection jig 2.

[0095] According to this embodiment, the method for erecting the portal-shaped corrugated steel plate 1 includes a pushing-up step of pushing the portal-shaped corrugated steel plate 1 up to the upper end of the upwardly inclined portion 21 along the inclination of the upwardly inclined portion 21 with the pair of protrusions 13 in contact with the upwardly inclined portion 21, and a lowering step of rotating the portal-shaped corrugated steel plate 1 about the pair of protrusions 13 as a rotation axis so that the upper plate 12 faces upward and lowering it from the upwardly inclined portion 21. Therefore, the portal-shaped corrugated steel plate 1 can be erected quickly by hand without using heavy machinery. This improves the ease of erecting the portal-shaped corrugated steel plate 1.

[0096] Furthermore, according to this embodiment, in the pushing-up step, the portal-shaped corrugated steel plate 1 is pushed up along the slope with the rotating rollers provided on one of the pair of protrusions 13 and the upwardly inclined portion 21 in contact with the other. This reduces friction between the pair of protrusions 13 and the upwardly inclined portion 21, allowing the portal-shaped corrugated steel plate 1 to be erected more quickly by hand. This further improves the ease of erecting the portal-shaped corrugated steel plate 1.

[0097] Furthermore, according to this embodiment, in the lowering step, the erection jig 2, which has wheels 25 attached to its bottom, is moved horizontally together with the portal corrugated steel plate 1. This allows the erected portal corrugated steel plate 1 to be easily assembled to the existing portal corrugated steel plate. This further improves the ease of erecting the portal corrugated steel plate 1.

[0098] Furthermore, according to this embodiment, in the lowering step, the portal-shaped corrugated steel plate 1 is erected on the bolster material 3 that has been laid in advance and extended in the horizontal direction. Therefore, the erected portal-shaped corrugated steel plate 1 can be lowered to the same height as the existing portal-shaped corrugated steel plate and easily assembled. This further improves the ease of erecting the portal-shaped corrugated steel plate 1.

[0099] Furthermore, according to this embodiment, an upwardly inclined portion 21 is formed, in which the portal corrugated steel plate 1 is pushed up to the upper end along the inclination, and a downwardly extending portion 22 is provided, in which the portal corrugated steel plate 1 is lowered from the upwardly inclined portion 21 in the horizontal direction or downwardly from the upper end of the upwardly inclined portion 21. This allows the portal corrugated steel plate 1 to be erected quickly by hand without using heavy machinery. This improves the ease of erecting the portal corrugated steel plate 1.

[0100] Although several embodiments of the present invention have been described, these embodiments are presented as examples and are not intended to limit the scope of the invention. These novel embodiments can be embodied in various other forms, and various omissions, substitutions, and modifications can be made without departing from the spirit of the invention. These embodiments and their modifications are included within the scope and spirit of the invention, and are also included in the scope of the invention and its equivalents as defined in the claims. [Explanation of symbols]

[0101] 1 Gate type corrugated steel plate 10, 10' steel plate body 101 Reinforcement ring 11 Pair of side panels 111, 112 Side panels 12 Upper Plate 13 Pair of protrusions 131, 132 protrusion 2. Standing jig 21 Uphill section 22 Descent section 221 Placement section 221a recess 222 Downhill section 223 Vertical section 23 Temporary storage area 24 Connection 25 rotating rollers 26 Guide 27 Locking part 3 Pillow material 31, 31' rail section 32 Rail connection 4 Work Platform F1 Front F2 rear R Rotation direction X 1st horizontal direction Y 2nd horizontal direction Z vertical direction

Claims

1. A method for erecting a portal-shaped corrugated steel plate using an erection jig, a push-up process in which an upper plate of the gate-shaped corrugated steel plate, which is continuous with a pair of side plates that are opposed to and spaced apart from each other, is disposed on the lower end side of an upwardly inclined portion of the erection jig, which is formed with an inclination that slopes obliquely upward, and a pair of protrusions that protrude from opposing surfaces of each of the pair of side plates are brought into contact with the upwardly inclined portion, and the gate-shaped corrugated steel plate is pushed up along the inclination to the upper end of the upwardly inclined portion; a lowering step of rotating the gate-shaped corrugated steel plate about the pair of protrusions as a rotation axis so that the upper plate faces upward and lowering the gate-shaped corrugated steel plate from the upward inclined portion after the pushing-up step; Having A method for erecting a portal-shaped corrugated steel plate, characterized by the above.

2. The pushing-up step includes pushing up the portal-shaped corrugated steel plate along the incline while a rotating roller provided on one of the pair of protrusions and the upward inclined portion is brought into contact with the other.

2. The method for erecting a portal-shaped corrugated steel plate according to claim 1,

3. The lowering step involves horizontally moving the erection jig, which has wheels at its bottom, together with the portal-shaped corrugated steel plate.

2. The method for erecting a portal-shaped corrugated steel plate according to claim 1,

4. The lowering step includes lowering the portal-shaped corrugated steel plate onto a pillow material that is laid in advance and extends in a horizontal direction. The method for erecting a portal-shaped corrugated steel plate according to any one of claims 1 to 3,

5. A portal-shaped corrugated steel plate erection jig used in the portal-shaped corrugated steel plate erection method according to claim 1, an upward inclined portion in which the inclination pointing obliquely upward is formed, and the portal-shaped corrugated steel plate is pushed up to an upper end along the inclination in a state in which the pair of protrusions are in contact with each other; a descending portion extending horizontally or downwardly from the upper end of the upwardly inclined portion and descending the portal-shaped corrugated steel plate from the upwardly inclined portion; To be prepared A portal-type corrugated steel plate erection jig characterized by the above.

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