JP7650144B2 - Corrugated steel plate and wall structure - Google Patents

Description

Application of Article 30, Paragraph 2 of the Patent Act Published on the website of JFE Construction Materials Corporation on July 22, 2020

The present invention relates to a corrugated steel plate that forms the wall surface of a hollow structure constructed, for example, underground or underwater, and a wall structure using the corrugated steel plate.

Conventionally, civil engineering structures such as shafts for constructing foundations for structures, underground collection wells, and slope retaining walls are constructed by installing corrugated steel plates to hold back the ground, and connecting multiple corrugated steel plates to form a ring-shaped or horseshoe-shaped (U-shaped) wall structure. Wall structures are also used in applications where they are constructed underwater to form spaces inside.

Such wall structures using corrugated steel plates have the advantage that each corrugated steel plate is lightweight and easy to construct even in mountainous areas where large heavy machinery cannot be used. On the other hand, when the wall structure is subjected to a large load from the surroundings, such as when it is installed deep underground, the wall structure is formed by sandwiching a member made of steel with an H-shaped cross section called a reinforcing ring between the corrugated steel plates assembled into a ring shape (see, for example, Patent Document 1).

JP 2018-193741 A

As in Patent Document 1, a wall structure formed by connecting corrugated steel plates assembled into a ring with a reinforcing ring has improved strength. However, because the reinforcing ring is attached along the bottom end of the corrugated steel plates assembled into a ring, it is necessary to bend the H-shaped steel along the corrugated steel plates.

The reinforcing ring has an H-shaped cross section, and is connected by abutting the end face of the corrugated steel plate against the web of the H-shaped steel. In other words, the end face of the corrugated steel plate is installed between the flanges of the H-shaped steel. Therefore, the part of the wall structure that is made up of the corrugated steel plate has a small dimension in the thickness direction, but the part of the reinforcing ring that forms the connection protrudes outward and inward. For example, when the wall structure is installed underground as a vertical shaft, the wall structure is constructed while a hole is excavated downward. Then, the corrugated steel plates, which are assembled in a ring shape, are extended while hanging inside the excavated hole. In this case, there was an issue that at least the part where the reinforcing ring is installed requires a large excavation of the ground.

Furthermore, in order to assemble the reinforcing ring into a ring shape by connecting pieces of a specified length, the flanges are connected to each other with joint plates and bolts. The flanges located on the outside of the wall structure are connected to each other by installing bolts or nuts in the narrow space between the ground and the reinforcing ring. This means that workers have to insert their hands from the bottom end of the reinforcing ring and work without being able to see the joint plates, bolts, and nuts, which makes the work difficult.

The present invention solves the above problems by providing a corrugated steel plate and wall structure that is space-saving and easy to assemble.

The corrugated steel plate of the present invention comprises a main body whose cross-sectional shape perpendicular to the longitudinal direction is processed into a corrugated shape, and a flat connection plate installed at both longitudinal ends of the main body, and the main body comprises two connection portions formed at both ends in a width direction perpendicular to the longitudinal direction, with bolt holes formed on a surface perpendicular to the width direction, and a wave-processed portion formed by processing the plate into a corrugated shape between the two connection portions, and the wave-processed portion is formed to protrude more than the two connection portions in a thickness direction perpendicular to the longitudinal and width directions of the main body, and the wave-processed portion is located at both ends in the thickness direction of the main body and comprises an outer flange portion and an inner flange portion arranged parallel to each other, and the outer flange portion and one of the two connection portions are connected via an inclined portion, and the inclined portion extends linearly in a cross section perpendicular to the longitudinal direction of the main body, and is inclined with respect to both the outer flange portion and the two connection portions.

The wall structure of the present invention is formed by combining the above-mentioned corrugated steel plates.

The wall structure according to the present invention further comprises a second corrugated steel plate having a cross-sectional shape perpendicular to the longitudinal direction different from that of the corrugated steel plate, and the second corrugated steel plate comprises a second body having a cross-sectional shape perpendicular to the longitudinal direction processed into a corrugated shape, and a flat connection plate installed at both ends of the longitudinal direction of the second body, and the second body comprises two connection parts formed at both ends in the width direction perpendicular to the longitudinal direction and having bolt holes formed therein, and a second corrugated part formed by corrugating a plate between the two connection parts, and the second corrugated part has a smaller dimension in the thickness direction than the corrugated part of the corrugated steel plate, and the corrugated steel plate and the second corrugated steel plate are joined at the connection parts formed at their respective ends in the width direction.

According to the present invention, the corrugated steel plate has a large thickness dimension of the corrugated body and a large section modulus in the thickness direction. Therefore, a wall structure formed by combining corrugated steel plates has high rigidity against external loads and can be constructed without installing reinforcing rings. Since the wall structure does not require reinforcing rings, it is space-saving and easy to assemble.

FIG. 1 is a perspective view of a wall structure 100 according to a first embodiment. 1A and 1B are a plan view and a side view of a wall structure 100 according to a first embodiment. 1 is a perspective view of a corrugated steel plate 10 constituting a wall structure 100 according to embodiment 1. FIG. 1 is a cross-sectional view of a corrugated steel plate 10 according to a first embodiment. 1 is a cross-sectional view of a wall structure 100 according to a first embodiment in an installed state. FIG. FIG. 11 is a cross-sectional view of an installed wall structure 1100, which is a comparative example of the wall structure 100 according to the first embodiment. FIG. 2 is a perspective view of a wall structure 100A which is a modified example of the wall structure 100 according to the first embodiment. FIG. 2 is a perspective view of a corrugated steel plate 10A of a wall structure 100A which is a modified example of the first embodiment. 1 is a perspective view of a corrugated steel plate 10B of a wall structure 100A which is a modified example of the first embodiment. FIG. FIG. 11 is a cross-sectional view of a wall structure 200 according to a second embodiment.

The wall structure 100 and the corrugated steel plate 10 according to the embodiment will be described below with reference to the drawings. Note that in the following drawings including FIG. 1, the relative dimensional relationships and shapes of the components may differ from the actual ones. In addition, in the following drawings, the same reference numerals are used to denote the same or equivalent items, and this applies throughout the entire specification. In addition, to facilitate understanding, terms indicating directions (e.g., up, down, left, right, front, back, front and back, etc.) are used as appropriate, but these notations are for the convenience of explanation and do not limit the arrangement, direction or orientation of devices, equipment, parts, etc.

Embodiment 1.
[Wall structure 100]
FIG. 1 is a perspective view of a wall structure 100 according to the first embodiment. FIG. 2 is a plan view and a side view of the wall structure 100 according to the first embodiment. FIG. 3 is a perspective view of a corrugated steel plate 10 constituting the wall structure 100 according to the first embodiment. The wall structure 100 will be described with reference to FIGS. 1 to 3. The wall structure 100 is, for example, a civil engineering structure such as a vertical shaft for constructing the foundation of a structure or a drainage well constructed in the ground, and is constructed in a vertical hole 90 formed by excavating a ground 92 (see FIG. 5). In the first embodiment, the wall structure 100 is formed in a circular tube shape, but is not limited to a circular tube shape. The wall structure 100 can be formed in an oval, elliptical, rectangular, or horseshoe shape in a plan view, and is not limited to a tube shape.

The wall structure 100 according to the first embodiment has a structure in which a plurality of corrugated steel plates 10 are connected to form annular bodies 50, and the annular bodies 50 are connected to each other in the axial direction. The wall structure 100 shown in Figures 1 and 2 has a six-stage structure of annular bodies 50A to 50F.

[Annular body 50]
Each annular body 50 constituting the wall structure 100 is formed by connecting a plurality of corrugated steel plates 10 shown in FIG. 3, and is formed by connecting the longitudinal ends of the corrugated steel plates 10. The corrugated steel plate 10 includes a main body 10a having a corrugation in the width direction, i.e., the z direction in FIG. 3, and a flat connecting plate 20 at both ends of the main body 10a in the longitudinal direction, i.e., the θ direction in FIG. 3. The connecting plate 20 is welded to the longitudinal end face of the main body 10a. In the annular body 50, adjacent corrugated steel plates 10 are connected to each other by connecting members such as bolts and nuts (not shown) to form a circumferential connecting portion 11.

The annular bodies 50 made of the corrugated steel plates 10 are joined together at the z-direction ends of the main body 10a of the corrugated steel plates 10 with joining members 40 such as bolts 41 and nuts 42 (see FIG. 5). As shown in FIG. 2(b), the corrugated steel plate 10 of the upper annular body 50A and the corrugated steel plate 10 of the lower annular body 50B are joined with both ends of the longitudinal direction shifted from each other. In the first embodiment, the corrugated steel plate 10 located at the top and the corrugated steel plate 10 located at the bottom are joined with a shift of half the longitudinal length. This allows the wall structure 100 to suppress the variation in rigidity at each position in the θ direction. However, the amount of shift of the corrugated steel plates 10 located above and below is not limited to half the longitudinal length, and can also be shifted by the pitch of the multiple bolt holes 13a provided in the connection portion 13. For example, the corrugated steel plate 10 in FIG. 3 has 10 bolt holes 13a formed in the connection portion 13, but the bolt holes 13a of the lower corrugated steel plate 10 may be offset by 1 to 5 pitches from the upper corrugated steel plate 10 when connecting.

[Corrugated steel sheet 10]
Fig. 4 is a cross-sectional view of the corrugated steel plate 10 according to the first embodiment. Fig. 4 shows a cross-section perpendicular to the longitudinal direction of the corrugated steel plate 10, and shows a cross-section including the central axis C of the wall structure 100 shown in Figs. 2 and 3. The main body 10a of the corrugated steel plate 10 is corrugated in a cross-section perpendicular to the longitudinal direction. In the first embodiment, the corrugation is a rectangular wave shape with rounded corners, and parallel surfaces are formed on the outside and inside of the wall structure 100.

The main body 10a formed in a trapezoidal wave shape includes an inner flange portion 16 that protrudes inward from the annular body 50 in the cross section of FIG. 4, and outer flange portions 17 and 18 that protrude outward from the annular body 50. The inner flange portion 16 and the outer flange portions 17 and 18 are formed substantially parallel to each other. The inner flange portion 16 and the outer flange portions 17 and 18 are connected by a web portion 15. The web portion 15 has a surface that extends in the r direction in the cross section of FIG. 4 and is slightly inclined with respect to the r axis. The inclination direction of the web portion 15 is such that, when the main body 10a is viewed from the central axis C, the open end of the valley portion of the wave shape is wide and the valley bottom is narrow. By being configured in this way, the main body 10a is easy to release from the mold when performing plastic processing for corrugation, making it easy to manufacture.

In addition, the web portion 15 is formed at an angle close to parallel to the r axis, so that the width of the inner flange portion 16, the outer flange portion 17, and the outer flange portion 18 becomes wider. As a result, the corrugated steel plate 10 has a high rigidity when a bending moment is applied in the r direction. When the wall structure 100 in FIG. 1 is loaded in the surface direction, that is, in the r direction, the corrugated steel plate 10 is loaded with a bending moment in the r direction. At this time, the section modulus of the corrugated steel plate 10 about the neutral axis N of bending is larger when the width of the inner flange portion 16, the outer flange portion 17, and the outer flange portion 18, which are farther from the neutral axis N, is wider. Therefore, by forming the web portion 15 at an angle close to parallel to the r axis, the width dimension in the z direction of the inner flange portion 16, the outer flange portion 17, and the outer flange portion 18 becomes wider, and the corrugated steel plate 10 has a high rigidity. In the cross section, the angle of the web portion 15 with respect to the inner flange portion 16, the outer flange portion 17, or the outer flange portion 18 is preferably set to 70 degrees or more and 90 degrees or less. In other words, it is desirable that the angle of the web portion 15 is set to 0 degrees or more and 20 degrees or less with respect to the perpendicular direction relative to the inner flange portion 16, the outer flange portion 17, or 18. For example, the angle of the web portion of the corrugated steel plate 10 shown in FIG. 4 is set to 4.5 degrees or 6 degrees. In other words, in the actual product, it is set to a range of 3 degrees or more and 7 degrees or less, so that mass production is improved while ensuring strength and rigidity. More desirably, in order to further improve strength and rigidity, the web portion 15 may be set to 1 degree or more and 3 degrees or less with respect to the perpendicular direction relative to the inner flange portion 16, the outer flange portion 17, or 18. By being configured in this way, the corrugated steel plate 10 can ensure higher rigidity while suppressing defects during die forming or roll forming, and also improves processability.

In the first embodiment, the inner flange portion 16 and the outer flange portions 17 and 18 are formed with the same plate thickness as the web portion 15, but the plate thickness may be made thicker than that of the web portion 15. By configuring them in this way, the cross-sectional area of the inner flange portion 16 and the outer flange portions 17 and 18 that are far from the neutral axis N becomes larger, and the corrugated steel plate 10 can have an even higher section modulus.

In addition, connection parts 13 are formed at both ends of the corrugated steel plate 10 in the z direction. The connection parts 13 are formed perpendicular to the z direction, and have bolt holes 13a in the flat parts. The connection parts 13 are parallel to the r direction and have a surface large enough to fasten and fix the bolts 41 and nuts 42 (see Figure 5).

The connection portion 13 is formed with a dimension h in the thickness direction of the main body 10a of the corrugated steel plate 10, and may be formed with a dimension that allows it to be connected and fixed to other corrugated steel plates 10. The thickness of the corrugation formed on the main body 10a, i.e., the dimension H from the outer flange portions 17 and 18 to the inner flange portion 16, is formed larger than the dimension h of the connection portion 13. By forming it in this manner, the corrugated steel plate 10 can be connected to a conventional corrugated steel plate 1010 while ensuring a large section modulus, as described below. In addition, since the connection portion 13 is an end portion in the z direction and a portion that is not connected to the inner flange portion 16 and has a structure that contributes little to the section modulus, the amount of material used can be reduced while ensuring rigidity by reducing the dimension h in the thickness direction of the corrugated steel plate 10. In addition, the portion in which the web portion 15, the inner flange portion 16, and the outer flange portions 17 and 18 are formed between the two connection portions 13 in the z direction is collectively referred to as the wave processing portion w.

[Function of the wall structure 100]
5 is a cross-sectional view of the wall structure 100 according to the first embodiment in an installed state. The wall structure 100 installed inside a vertical hole 90 like the wall structure 100 according to the first embodiment is installed as follows. First, a vertical hole 90 of a predetermined depth is created, and one to three layers of annular bodies 50 of corrugated steel plates 10 are assembled and placed inside the vertical hole 90. Then, a grid is assembled at the top of the vertical hole 90, and the uppermost annular body 50 is fixed to the grid. At this time, the position, verticality, and shape of the annular body 50 are adjusted. After confirming that the accuracy is sufficient, the area around the annular body 50 is backfilled.

After backfilling the area around the ring-shaped body 50, the bottom of the vertical hole 90 inside the ring-shaped body 50 is excavated. When the depth of the vertical hole 90 becomes greater than the width dimension of the corrugated steel plate 10, the corrugated steel plate 10 is connected to the bottom end of the wall structure 100 whose upper end is fixed to the crisscross pattern, and a new ring-shaped body 50 is connected. By repeating the excavation of the bottom of the vertical hole 90 and the assembly of the corrugated steel plate 10, the wall structure 100 is constructed in the vertical hole 90 to the required depth.

The wall structure 100 extends downward while excavating the bottom of the vertical hole 90, creating a gap 91 between the vertical hole 90 and the outer periphery of the wall structure 100. The gap 91 is filled with a filler material 93 such as mortar.

Figure 6 is a cross-sectional view of the installed state of a wall structure 1100, which is a comparative example of the wall structure 100 according to the first embodiment. The wall structure 1100 according to the comparative example is formed by assembling the corrugated steel plate 1010 in the same manner as the annular body 50 of the wall structure 100 according to the first embodiment. The corrugations on the main body 1010a of the corrugated steel plate 1010 according to the comparative example have a shape that approximates a sine curve in a cross section perpendicular to the longitudinal direction. In addition, the dimension H1 in the thickness direction (r direction) of the main body 1010a is smaller than the dimension H in the thickness direction (r direction) of the main body 10a of the corrugated steel plate 10 according to the first embodiment, and is formed to be equal to the dimension h of the connection portion 13. Note that the portion of the sheet metal member formed into a sine curve shape between the two connection portions 13 in the z direction is collectively referred to as the second wave processing portion w2.

In the wall structure 1100 according to the comparative example, the thickness dimension H of the corrugated steel plate 1010 is small, and the section modulus is small compared to the corrugated steel plate 10 according to the first embodiment. Therefore, in the wall structure 1100, a reinforcing ring 60 is installed between the corrugated steel plate 1010 located on the upper side and the corrugated steel plate 1010 located on the lower side. The number and position of the reinforcing rings 60 are changed depending on the load applied to the wall structure 1100. In the wall structure 1100 according to the comparative example shown in FIG. 6, two corrugated steel plates 1010 are connected to each other at the connection portion 13 as shown in the center of the figure, and reinforcing rings 60 are installed at the upper and lower ends of the two corrugated steel plates 1010.

As shown in FIG. 6, the ground 92 is excavated far outward at the position where the reinforcing ring of the wall structure 1100 is installed. This is because the outside of the reinforcing ring 60 needs to have the connection plate 62 bolted to the flange of the H-shaped steel 61. Therefore, when excavating the vertical hole 90, the wall structure 1100 requires a larger amount of excavation than the wall structure 100 according to embodiment 1. Furthermore, if one tries to minimize the amount of excavation, the surface of the vertical hole 90 will have complex irregularities, as shown in FIG. 6.

As shown in FIG. 5, in the first embodiment, the wall surface of the vertical hole 90 is formed in a generally straight line in cross section. Even if the gap 91 between the outer peripheral surface of the wall structure 100 and the wall surface of the vertical hole 90 is small, this does not affect the assembly of the corrugated steel plate 10. Therefore, in the first embodiment, the amount of excavation of the vertical hole 90 can be kept as small as possible. In addition, since the wall surface of the vertical hole 90 does not have any irregularities, there is an advantage that it is easier to pour the filler material 93 into it than in the comparative example.

The wall structure 1100 according to the comparative example also requires a reinforcing ring 60 between the annular bodies 50. The procedure for installing the reinforcing ring 60 will be described with reference to the connection portion of the corrugated steel plates 1010p and 1010q in FIG. 6. To connect the reinforcing ring 60, the reinforcing ring 60 is first temporarily fixed to the lower end of the annular body 50 located at the lower end of the wall structure 1100 that has already been assembled, for example, by a temporary fixing bolt (not shown). In other words, the reinforcing ring 60 is temporarily fixed to the lower connection portion 13 of the corrugated steel plate 1010p in FIG. 6. Then, the corrugated steel plate 1010q constituting the annular body 50 below the reinforcing ring 60 is installed so as to sandwich the web 63 of the reinforcing ring 60.

The corrugated steel plate 1010q attached to the underside of the reinforcing ring 60 is connected to a position that avoids the temporary bolts connecting the reinforcing ring 60 and the corrugated steel plate 1010p. After the corrugated steel plate 1010p, the reinforcing ring 60, and the corrugated steel plate 1010q are fixed by the joining member 40, the temporary bolts are removed, and the corrugated steel plate 1010q is connected to the part where the temporary bolts were installed. In other words, the wall structure 1100 of the comparative example requires a process of tightening the temporary bolts to temporarily fix the reinforcing ring 60 when connecting the reinforcing ring 60, and then removing them, which increases the installation labor.

On the other hand, in the wall structure 100 according to embodiment 1, the section modulus of the corrugated steel plate 10 is large, and the reinforcing ring 60 can be eliminated or reduced. Therefore, the wall structure 100 can eliminate or reduce the temporary fastening process of the reinforcing ring 60 as described above, reducing installation time and costs.

The corrugated steel plate 1010 according to the comparative example shown in FIG. 6 has three inner corrugated protrusions 116 and four outer corrugated protrusions 117 and 118 to ensure rigidity against bending. The corrugated steel plate 1010 is connected to adjacent corrugated steel plates 1010 in the longitudinal direction, and bolts and nuts are installed on the outer corrugated protrusions 117 and 118. In other words, the corrugated steel plate 1010 is connected by bolts and nuts at four points in the longitudinal direction.

On the other hand, the corrugated steel plate 10 according to the first embodiment has three outer flange portions 17 and 18, and as shown in FIG. 4, the bolt holes 21 are formed in three places. This reduces the number of bolts and the labor required to connect the corrugated steel plate 10. In addition, the valleys of the corrugations where the bolts are installed are wider than in the comparative example, making it possible to install bolts with a larger diameter and higher strength.

The wall structure 100 constructed with the corrugated steel plate 10 according to embodiment 1 does not use the reinforcing ring 60, and therefore has no protrusion into the inner space, making it easier to install structures such as ladders and stairs in the inner space. When the wall structure 100 is applied to a deep foundation pile, the lack of the reinforcing ring 60 ensures a large internal space, allowing structures to be constructed in the internal space to be installed closer to the corrugated steel plate 10. In other words, the wall structure 100 has the advantage of reducing the extra space that would otherwise be created by only the reinforcing ring 60 protruding inward.

[Modifications of the wall structure 100]
FIG. 7 is a perspective view of a wall structure 100A which is a modified example of the wall structure 100 according to the first embodiment. FIG. 8 is a perspective view of a corrugated steel plate 10A of the wall structure 100A which is a modified example of the first embodiment. FIG. 9 is a perspective view of a corrugated steel plate 10B of the wall structure 100A which is a modified example of the first embodiment. The wall structure 100 according to the first embodiment is not limited to a circular tube shape, and may be a rectangular tube in a plan view as shown in FIG. 7. The wall structure 100A includes a corrugated steel plate 10A applied to the side portion of the rectangular shape in a plan view, and a corrugated steel plate 10B applied to the corner portion. The cross sections perpendicular to the longitudinal direction of the corrugated steel plates 10A and 10B are the same as the corrugated steel plate 10 constituting the wall structure 100 in FIG. 1.

As shown in FIG. 8, the corrugated steel plate 10A applied to the portion corresponding to the rectangular side of the wall structure 100A has a connecting plate 20 joined to both longitudinal ends of the corrugated body 10a. The body 10a of the corrugated steel plate 10A extends linearly in the longitudinal direction, and has a cross-sectional shape similar to that of the body 10a of the corrugated steel plate 10.

As shown in FIG. 9, the corrugated steel plate 10B applied to the corners is constructed by connecting the corrugated body 10a with the corner connection member 70.

Even in the wall structure 100A, which is a modified example of the wall structure 100 according to the first embodiment, the main body 10a of the corrugated steel plates 10A and 10B has a larger section modulus than the comparative example, and has improved rigidity. Therefore, in the wall structure 100A, it is possible to reduce or eliminate the reinforcing ring 60.

Embodiment 2.
A wall structure 200 according to embodiment 2 will be described. The wall structure 200 is obtained by modifying the shape of the corrugated steel plate 10 constituting the wall structure 100 according to embodiment 1. Note that components having the same functions and actions as those in embodiment 1 are denoted by the same reference numerals and descriptions thereof will be omitted.

Figure 10 is a cross-sectional view of a wall structure 200 according to embodiment 2. The wall structure 200 includes an annular body 50A made of a conventional corrugated steel plate 1010 and an annular body 50B made of a corrugated steel plate 10 according to embodiment 1. The annular body 50A made of the corrugated steel plate 1010 and the annular body 50B made of the corrugated steel plate 10 according to embodiment 1 are connected to each other at a connection portion 13 with bolts and nuts. The corrugated steel plate 1010 of the comparative example applied to the wall structure 200 is referred to as the second corrugated steel plate 1010. The main body 1010a of the second corrugated steel plate 1010 is referred to as the second main body 1010a, and the portion between the connection portions 13 of the second corrugated steel plate 1010 is referred to as the second wave processing portion w2.

By applying the corrugated steel plate 1010 of the comparative example to the upper annular body 50A and the corrugated steel plate 10 of the first embodiment to the lower annular body 50B, it is possible to use different corrugated steel plates for the upper part of the vertical hole 90, which has a relatively low load, and the lower part, which has a high load. In addition, if the vertical hole 90 in which the wall structure 200 is installed is deep, a reinforcing ring 60 made of H-shaped steel can be connected to the annular body 50 made of the corrugated steel plate 10 of the first embodiment. By configuring in this way, the members constituting the wall structure 200 can be changed appropriately depending on the load received from the ground 92, the wall structure 200 can be applied to various environments, and the amount of reinforcing ring 60 used can be reduced.

In addition, by combining the corrugated steel plate 10 and the corrugated steel plate 1010 to form the wall structure 200, the wall structure 200 has the advantage of being able to reduce the weight of the steel material.

The configurations shown in the above embodiments are merely examples, and may be combined with other known technologies. Parts of the configurations may be omitted or modified without departing from the spirit of the invention.

10 Corrugated steel plate, 10A Corrugated steel plate, 10B Corrugated steel plate, 10a Main body, 11 Circumferential connection portion, 13 Connection portion, 13a Bolt hole, 15 Web portion, 16 Inner flange portion, 17 Outer flange portion, 20 Connection plate, 21 Bolt hole, 40 Joint member, 41 Bolt, 42 Nut, 50 50A 50B Annular body, 60 Reinforcement ring, 61 H-shaped steel, 62 Connection plate, 63 Web, 70 Corner connection member, 90 Vertical hole, 91 Gap, 92 Ground, 93 Filler, 100 Wall structure, 100A Wall structure, 110 Corrugated steel plate, 110a Main body, 116 Inner convex portion, 117 Outer convex portion, 200 Wall structure, 1010 1010p 1010q (2nd) corrugated steel plate, 1010a (2nd) body, 1100 wall structure, C central axis, H (thickness direction) dimension, H1 (thickness direction) dimension, N neutral axis, h dimension, w wave processing section, w2 second wave processing section.

Claims (10)

A main body having a corrugated cross-sectional shape perpendicular to the longitudinal direction;
A flat connection plate is provided at both ends of the main body in the longitudinal direction,
The body includes:
Two connection portions are formed at both ends in a width direction perpendicular to the longitudinal direction, and bolt holes are formed on surfaces perpendicular to the width direction;
A corrugated portion formed by corrugating a plate between the two connection portions is provided,
The wave processing unit is
The body is formed so as to protrude beyond the two connecting portions in a thickness direction perpendicular to the longitudinal direction and width direction of the body,
The corrugated portion is located at both ends in a thickness direction of the main body and includes an outer flange portion and an inner flange portion arranged parallel to each other,
The outer flange portion and one of the two connection portions are connected via an inclined portion,
The inclined portion extends linearly in a cross section perpendicular to the longitudinal direction of the main body, and is inclined with respect to both the outer flange portion and the two connection portions . The wave processing unit is
The corrugated steel sheet according to claim 1 , further comprising a web portion extending in the thickness direction and connecting the outer flange portion and the inner flange portion. At least one of the outer flange portion and the inner flange portion is
The corrugated steel sheet according to claim 2, wherein a cross section perpendicular to the longitudinal direction of the body has a surface parallel to the width direction of the body. A main body having a corrugated cross-sectional shape perpendicular to the longitudinal direction;
A flat connection plate is provided at both ends of the main body in the longitudinal direction,
The body includes:
Two connection portions are formed at both ends in a width direction perpendicular to the longitudinal direction, and bolt holes are formed on surfaces perpendicular to the width direction;
A corrugated portion formed by corrugating a plate between the two connection portions is provided,
The wave processing unit is
An outer flange portion and an inner flange portion are located at both ends in a thickness direction of the main body and are arranged parallel to each other;
a web portion extending in a thickness direction and connecting the outer flange portion and the inner flange portion,
The outer flange portion and one of the two connection portions are connected via an inclined portion,
The inclined portion extends linearly in a cross section perpendicular to the longitudinal direction of the main body, and is inclined with respect to both the outer flange portion and the two connection portions . At least one of the outer flange portion and the inner flange portion is
The corrugated steel sheet according to claim 4, wherein a cross section perpendicular to the longitudinal direction of the body has a surface parallel to the width direction of the body. At least one of the outer flange portion and the inner flange portion is
The corrugated steel sheet according to any one of claims 2 to 5, wherein the sheet thickness is thicker than that of the web portion. The wave processing unit is
The corrugated steel plate according to any one of claims 1 to 6, which is formed by processing a sheet metal member into a rectangular wave shape in a cross section perpendicular to the longitudinal direction of the body. A wall structure formed by combining the corrugated steel plates described in any one of claims 1 to 7. Further provided is a second corrugated steel plate having a cross-sectional shape perpendicular to the longitudinal direction different from the corrugated steel plate,
The second corrugated steel plate is
A second body having a corrugated cross-sectional shape perpendicular to the longitudinal direction;
and a flat connection plate provided at each end of the second body in the longitudinal direction,
The second body includes:
Two connection portions formed at both ends in a width direction perpendicular to the longitudinal direction and having bolt holes;
A second wave processing portion formed by processing a plate into a wave shape is provided between the two connection portions,
The second wave processing section is
The thickness direction dimension is smaller than the corrugated portion of the corrugated steel plate,
The corrugated steel sheet and the second corrugated steel sheet are
The wall structure according to claim 8 , wherein the connecting portions formed at the respective widthwise ends are joined together. A reinforcing ring having an H-shaped cross section perpendicular to the longitudinal direction,
The reinforcing ring is
The wall structure according to claim 9, which is connected to the connection portion of the corrugated steel plate or the second corrugated steel plate.

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