Earth retaining panel, earth retaining structure using earth retaining panel, and method for manufacturing earth retaining panel

Abstract

To provide an earth retaining panel capable of eliminating a bolt joining work between reinforcing members with each other at a construction site, an earth retaining structure using an earth retaining panel, and a manufacturing method of an earth retaining panel.SOLUTION: An earth retaining panel comprises: a corrugated steel plate formed so that crests and valleys of corrugation extend along a longitudinal direction; a pair of vertical flanges provided at both longitudinal ends of the corrugated steel plate; and a reinforcing member extending along the longitudinal direction of the corrugated steel plate and provided at least one of both transverse ends of the corrugated steel plate. Both longitudinal ends of the reinforcing member are joined to an outer surface of the vertical flanges.SELECTED DRAWING: Figure 5

Description

Technical Field

[0001] The present invention relates to a soil retaining panel, a soil retaining structure using the soil retaining panel, and a method for manufacturing the soil retaining panel.

Background Art

[0002] Conventionally, as disclosed in Patent Document 1 for example, there is known a soil retaining structure constructed by assembling soil retaining panels made of corrugated steel plates in an excavation hole formed by excavating the ground. The soil retaining structure is constructed by stacking a structure formed by annularly arranging a plurality of corrugated steel plates along the wall surface of the excavation hole in the hole axis direction.

[0003] In the soil retaining structure, as the depth of the excavation hole increases, the earth pressure from the ground side increases, and the rigidity of only the corrugated steel plate may not be sufficient. Also, regardless of the depth, depending on soil conditions and the like, there may be cases where earth pressure and water pressure act and the external force is large. Furthermore, as the depth in the hole axis direction increases, the self-weight of the structure arranged above acts on the structure arranged below. Therefore, in the soil retaining structure, at locations where the rigidity is insufficient, an H-shaped steel called a reinforcing ring is sandwiched between adjacent corrugated steel plates in the vertical direction to increase the rigidity.

[0004] The reinforcing ring is constructed by arranging a plurality of H-shaped steels along the circumferential direction of the excavation hole such that their flange portions face the ground side and the excavation side, and joining the flange portions of adjacent H-shaped steels via joint plates. The joint plates are respectively applied to the flange portion on the ground side and the flange on the excavation side of the H-shaped steel, and bolted to the flange portions of adjacent H-shaped steels respectively.

Prior Art Documents

Patent Documents

[0005]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0006] However, when joining the flanges of adjacent H-beams via joint plates, if the joint plates located on the ground side are bolted together, workers are forced to crouch down, wrap around from the lower end of the retaining structure under construction to the ground side, and tighten the bolts in an awkward position. In other words, the bolting work on the ground side is inefficient, complicated, and time-consuming, placing a heavy burden on the workers. As a result, there is a problem of prolonged construction periods and increased construction costs. Furthermore, when multiple H-beams are placed along the circumferential direction of the excavation hole and adjacent H-beams on the left and right are connected with flange joints, there are connection points that are out of the workers' sight. Therefore, this assembly method involves working in conditions where visual inspection is difficult, making assembly difficult and raising concerns about safety.

[0007] The present invention aims to solve the above-mentioned problems and to provide a retaining wall panel, a retaining wall structure using the retaining wall panel, and a method for manufacturing the retaining wall panel, which eliminate the need for bolting reinforcing members together at the construction site. [Means for solving the problem]

[0008] The earth retaining panel according to the present invention is an earth retaining panel used to construct an earth retaining structure by being installed in an excavated hole formed by excavating the ground, and comprises: a corrugated steel plate formed such that the peaks and valleys of the corrugated shape extend along the longitudinal direction; a pair of vertical flanges provided at both ends of the corrugated steel plate in the longitudinal direction; and a reinforcing member extending along the longitudinal direction of the corrugated steel plate and provided at least one end of both ends of the corrugated steel plate in the short direction. The corrugated steel sheet has a transverse flange portion at at least one of its ends in the short direction. The reinforcing member is It is positioned with its inner surface in contact with the horizontal flange portion and is not joined to the corrugated steel plate. Both ends in the longitudinal direction are on the outer surface of the vertical flange portion By welding It is joined together.

[0009] The earth retaining structure according to the present invention includes a structure in which a plurality of earth retaining panels having the above configuration are arranged along the wall surface of the excavation hole, and the earth retaining panels are connected to each other to form an assembled structure.

[0010] The present invention relates to a method for manufacturing an earth retaining panel, which is used to construct an earth retaining structure by being installed in an excavated hole formed by excavating the ground, and comprises the steps of combining a pair of vertical flange portions and a reinforcing member disposed between the pair of vertical flange portions to form a frame shape, and the vertical flange portions facing both ends of the reinforcing member By welding The steps include joining the vertical flange portion and the reinforcing member to form a frame, and placing inside the frame, A corrugated steel plate is formed such that the peaks and valleys of the wave extend along the longitudinal direction, and at least one of the ends in the short direction has a transverse flange portion, which is fitted into the corrugated steel plate, and the transverse flange portion is brought into contact with the inner surface of the reinforcing member. The aforementioned Both ends of corrugated steel plate of Opposing The vertical flange portion By welding The joining process and Furthermore, the reinforcing member is not joined to the corrugated steel plate. It is. [Effects of the Invention]

[0011] In this invention, since both longitudinal ends of the reinforcing member are joined to the vertical flange portion, by joining the vertical flange portions of adjacent earth retaining panels along the circumferential direction of the excavation hole, adjacent reinforcing members can be installed along the circumferential direction without having to bolt them together via a joint plate. Therefore, the bolting work of reinforcing members at the construction site can be omitted, thereby improving the work efficiency of the construction work. [Brief explanation of the drawing]

[0012] [Figure 1] This is a schematic perspective view showing an example of an earth retaining structure. [Figure 2] This is a perspective view showing an example of an earth retaining panel that makes up an earth retaining structure. [Figure 3] This is a longitudinal cross-sectional view showing an example of an earth retaining panel that constitutes an earth retaining structure. [Figure 4] This is a schematic diagram illustrating an example of a construction method for earth retaining structures. [Figure 5] This is a perspective view showing the earth retaining panel according to Embodiment 1. [Figure 6] This is a longitudinal cross-sectional view showing a retaining wall panel according to Embodiment 1. [Figure 7] This is a perspective view showing the reinforcing member of the earth retaining panel according to Embodiment 1. [Figure 8] It is an explanatory diagram showing a state in which the earth retaining panels according to Embodiment 1 are arranged vertically and connected. [Figure 9] It is an explanatory diagram showing a state in which the earth retaining panels according to Embodiment 1 are arranged in the circumferential direction of the excavation hole and connected. [Figure 10] It is a longitudinal sectional view showing a modified example of the earth retaining panel according to Embodiment 1. [Figure 11] It is a longitudinal sectional view showing the earth retaining panel according to Embodiment 2. [Figure 12] It is an explanatory diagram showing a state in which the earth retaining panels according to Embodiment 2 are arranged vertically and connected. [Figure 13] It is a longitudinal sectional view showing the earth retaining panel according to Embodiment 3. [Figure 14] It is a longitudinal sectional view showing the earth retaining panel according to Embodiment 4. [Figure 15] It is an explanatory diagram showing a state in which the earth retaining panels according to Embodiment 4 are arranged vertically and connected. [Figure 16] It is an explanatory diagram showing an example of the procedure of the manufacturing method of the earth retaining panel. [Figure 17] It is an explanatory diagram showing a state in which both ends of the reinforcing member are joined to the inner surface of the vertical flange portion. [Figure 18] It is an explanatory diagram showing a modified example 1 of the frame body in the manufacturing method of the earth retaining panel. [Figure 19] It is an explanatory diagram showing a modified example 2 of the frame body in the manufacturing method of the earth retaining panel. [Figure 20] It is an explanatory diagram showing a modified example 3 of the frame body in the manufacturing method of the earth retaining panel. [Figure 21] It is an explanatory diagram showing a modified example 4 of the frame body in the manufacturing method of the earth retaining panel.

Embodiments for Carrying Out the Invention

[0013] Embodiments of the present invention will be described below with reference to the drawings. In each drawing, the same or corresponding parts are denoted by the same reference numerals, and their descriptions are omitted or simplified as appropriate. Furthermore, the shape, size, and arrangement of the configurations shown in each drawing can be modified as appropriate within the scope of the present invention. In addition, in this embodiment, terms indicating direction (e.g., up, down, left, right, vertical, horizontal, etc.) are used as appropriate to facilitate understanding, but these notations are for the convenience of explanation and do not limit the arrangement, direction, and orientation of the devices, instruments, or parts.

[0014] Embodiment 1. First, an example of an earth retaining structure 200 will be explained with reference to Figures 1 to 4. Figure 1 is a schematic perspective view showing an example of an earth retaining structure 200. Figure 2 is a perspective view showing an example of an earth retaining panel 101 that constitutes the earth retaining structure 200. Figure 3 is a longitudinal cross-sectional view showing an example of an earth retaining panel 101 that constitutes the earth retaining structure 200. An earth retaining structure 200 is a structure such as a foundation for a structure, a shaft for constructing a sewer, or a water collection well constructed underground. An earth retaining structure 200 is constructed by stacking annular structures 201, as shown in Figure 1, in multiple stages along the axis direction of the excavation hole in a vertical excavation hole formed by excavating the ground.

[0015] Each structure 201 constituting the earth retaining structure 200 is formed by arranging a plurality of earth retaining panels 101 in a ring shape. As shown in Figures 2 and 3, the earth retaining panel 101 comprises a single corrugated steel plate 1 formed such that the peaks 1a and valleys 1b of the corrugation extend along the longitudinal direction X, and vertical flange portions 2 provided at both ends of the corrugated steel plate 1 in the longitudinal direction X.

[0016] Corrugated steel sheet 1 is constructed by bending a rolled steel sheet into a corrugated shape so that the corrugated cross section is angular. In this embodiment, the angular corrugated shape is, for example, a trapezoidal corrugated shape with rounded corners. Corrugated steel sheet 1 is composed of, for example, three peaks 1a and two valleys 1b. However, the number of peaks 1a and valleys 1b is not limited to the number shown. The peaks 1a and valleys 1b are formed to be approximately parallel. In corrugated steel sheet 1, the web 1c connecting the peaks 1a and valleys 1b is formed with a slight inclination to the horizontal direction so that the bottom of the valleys 1b is narrow. By slightly inclining the web 1c, it becomes easier to demold when performing plastic processing for corrugation, and manufacturing becomes easier. Furthermore, by reducing the inclination angle of the web 1c connecting the peaks 1a and valleys 1b of the corrugated steel sheet 1, the space between the peaks 1a and valleys 1b is widened, increasing the rigidity when a bending moment is applied in the plane direction. This is because the section modulus at the neutral axis of bending of the corrugated steel sheet 1 increases as the width between the peaks 1a and valleys 1b increases. The inclination angle of the web 1c of the corrugated steel sheet 1 with respect to the horizontal direction is set to 0° or more and 20° or less, and more preferably to 0° or more and 3° or less.

[0017] The corrugated steel sheet 1 has a thickness of approximately 2.7 mm to 7 mm. The thickness of the peaks 1a and valleys 1b is the same as the thickness of the web 1c, but it may be thicker than the web 1c. By configuring it in this way, the cross-sectional area of ​​the peaks 1a and valleys 1b, which are farther from the neutral axis, becomes larger, and the section modulus of the corrugated steel sheet 1 can be further increased.

[0018] As shown in Figures 2 and 3, the corrugated steel sheet 1 has transverse flange portions 10 at both ends in the short direction Y, formed by bending the edges of the corrugation. The transverse flange portions 10 are flat plate-like portions formed almost perpendicular to the hole axis direction. Multiple connecting holes 10a are formed along the longitudinal direction X in the transverse flange portions 10 for connecting adjacent corrugated steel sheets stacked vertically in the hole axis direction of the excavated hole. Adjacent corrugated steel sheets 1 are connected by butting the transverse flange portions 10 together and fastening the shafts of bolts inserted through the connecting holes 10a with nuts. Note that the means for connecting the transverse flange portions 10 of adjacent corrugated steel sheets 1 may be, for example, a connector such as a clip. Also, the number of connecting holes 10a shown is just an example and is not limited to this.

[0019] The vertical flange portion 2 is constructed by welding plates to both ends of the corrugated steel plate 1 in the longitudinal direction X. The thickness of the vertical flange portion 2 is determined according to the strength and rigidity required for the earth retaining structure 200. Multiple connecting holes 2a are formed in the vertical flange portion 2 along the vertical direction (Y direction) for connecting adjacent earth retaining panels 101 arranged in the circumferential direction of the excavation hole. Adjacent earth retaining panels 101 are connected by butting the vertical flange portions 2 together and fastening the shafts of bolts inserted through the connecting holes 2a with nuts. Note that the means for connecting the vertical flange portions 2 of adjacent earth retaining panels 101 may be, for example, a connector such as a clip. Also, the number of connecting holes 2a shown in the figure is just an example and is not limited thereto. As shown in Figure 1, corner earth retaining panels 102, which are L-shaped and processed via corner members 4, are arranged at the rectangular corners of the structure 201. The corrugated steel plate 1 and vertical flange portion 2 that constitute the earth retaining panel 102 are the same as the configuration described above.

[0020] Note that the cross-sectional shape of the retaining wall panel 101 shown in Figures 1 to 3 is just an example; it may also be formed in a sine curve shape, or in any other shape.

[0021] Next, an example of the construction method for the earth retaining structure 200 described above will be explained with reference to Figure 4. Figure 4 is a schematic explanatory diagram showing an example of the construction method for the earth retaining structure 200. First, as shown in Figure 4(A), an excavation hole 301 for constructing the earth retaining structure 200 is formed in the ground 300. The excavation hole 301 is formed with an outer diameter that is, for example, about 20 cm larger than the outer diameter of the earth retaining structure 200. The depth of the excavation hole 301 is, for example, about 0.5 m to 1.5 m. Then, the earth retaining panels 101 are arranged in a ring along the wall surface of the excavation hole 301 to assemble the structure 201. The earth retaining panels 101 are arranged so that the peak portion 1a faces the ground side and the valley portion 1b faces the excavation side. The ground side is the outer surface side of the earth retaining panel 101, and the excavation side is the inner surface side of the earth retaining panel 101.

[0022] The structure 201 is assembled by sequentially arranging retaining panels 101 along the circumferential direction of the wall surface of the excavated hole 301, and connecting adjacent retaining panels 101 on the left and right with bolts and nuts. The retaining panels 101 of the upper structure 201 and the retaining panels 101 of the lower structure 201 are connected with bolts and nuts. The retaining panels 101 of the upper and lower structures 101 are arranged in a staggered pattern, with their positions offset in the circumferential direction. This makes it possible to suppress variations in strength and rigidity at each position in the circumferential direction of the retaining structure 200. However, if the vertical flange portion 2 of the retaining panels 101 has sufficient thickness, they may be installed continuously in the direction of the hole axis without being arranged in a staggered pattern. In this way, a part of the retaining structure 200 is constructed by stacking multiple layers of the structure 201 along the direction of the hole axis (three layers in the illustrated example).

[0023] Next, as shown in Figure 4(B), the uppermost structure 201 is fixed to the ground 300 with a grid 400, and then the excavated hole 301 outside the structure 201 is backfilled with excavated soil. Note that the means for fixing the uppermost structure 201 to the ground 300 is not limited to the grid 400; for example, concrete may be used.

[0024] Then, as shown in Figure 4(C), the structure 201 is assembled while excavating the ground, and the excavation continues to a predetermined depth. After the uppermost structure 201 is fixed with the crisscross 400, retaining wall panels 101 are placed along the circumferential direction of the wall surface of the excavation hole 301 at the lower end of the upper structure 201, and connected to the upper retaining wall panels 101 with bolts and nuts, and adjacent retaining wall panels 101 on the left and right are connected with bolts and nuts to construct the lower structure 201. Concrete or mortar is filled as backfill material between the retaining wall panels 101 and the excavation hole 301.

[0025] Thus, the earth retaining structure 200 is constructed by stacking multiple ring-shaped structures 201, as shown in Figure 1, in a vertical excavation hole 301 formed by excavating the ground 300, along the axis direction of the excavation hole 301. The earth retaining structure 200 is not limited to the rectangular shape shown in Figure 1, and may be circular, oval-shaped, or U-shaped, such as a horseshoe, in plan view. The corrugated steel plate 1 shall be made in a shape corresponding to the shape of the earth retaining structure 200.

[0026] Incidentally, as the depth of the excavation hole 301 increases, the earth pressure from the ground side increases, and the earth retaining structure 200 may not have sufficient rigidity. Also, regardless of the depth, depending on the soil conditions, earth pressure and water pressure may act, resulting in large external forces. Furthermore, as the depth in the axial direction of the hole increases, the self-weight of the structure 201 positioned above acts on the structure 201 positioned below.

[0027] Therefore, in conventional earth retaining structures, at greater depths, H-shaped steel beams called reinforcing rings are inserted between adjacent structures 201 vertically to increase rigidity. The reinforcing ring is constructed by arranging multiple H-shaped steel beams along the circumferential direction of the excavation hole, with their flanges facing the ground side and the excavation side, and joining the flanges of adjacent H-shaped steel beams via joint plates. The joint plates are placed on the flange on the ground side and the flange on the excavation side of the H-shaped steel beam, respectively, and bolted to the flanges of adjacent H-shaped steel beams.

[0028] However, when joining the flanges of adjacent H-beams via joint plates, if the joint plates located on the ground side are bolted together, workers are forced to crouch down, wrap around from the lower end of the retaining structure under construction to the ground side, and tighten the bolts in an awkward position. In other words, the bolting work on the ground side is inefficient, complicated, and time-consuming, placing a heavy burden on the workers. As a result, the construction period is prolonged and construction costs are increased. Furthermore, when multiple H-beams are placed along the circumferential direction of the excavation hole 301 and adjacent H-beams on the left and right are connected with flange joints, there are connection points that are out of the workers' sight. Therefore, with this assembly method, work is performed in conditions where visual inspection is difficult, making it impossible to confirm that the bolts are securely connected, which not only makes assembly difficult but also raises concerns about safety.

[0029] Therefore, the earth retaining panel 100 according to this embodiment 1 is characterized by a configuration that eliminates the need for circumferential bolting work between reinforcing members 3 at the construction site. Figure 5 is a perspective view showing the earth retaining panel 100 according to embodiment 1. Figure 6 is a longitudinal cross-sectional view showing the earth retaining panel 100 according to embodiment 1. Figure 7 is a perspective view showing the reinforcing member 3 of the earth retaining panel 100 according to embodiment 1.

[0030] As shown in Figures 5 and 6, the earth retaining panel 100 according to this embodiment 1 comprises a corrugated steel plate 1 formed such that the peaks 1a and valleys 1b of the corrugated steel plate extend along the longitudinal direction X, a pair of vertical flange portions 2 provided at both ends of the corrugated steel plate 1 in the longitudinal direction X, and a reinforcing member 3 extending along the longitudinal direction X of the corrugated steel plate 1 and provided at the lower end of the corrugated steel plate 1.

[0031] The corrugated steel plate 1 and the vertical flange portion 2 have the same configuration as the earth retaining panel 101 described above. In other words, the corrugated steel plate 1 is constructed by bending a rolled steel plate into a corrugated shape so that the corrugated cross section is angular. In this embodiment 1, the angular corrugated shape is, for example, a trapezoidal corrugated shape with rounded corners. Also, as shown in Figures 5 and 6, the corrugated steel plate 1 has horizontal flange portions 10 at both ends in the short direction Y, formed by bending the edges of the corrugated shape. The vertical flange portion 2 is constructed by welding plates to both edges in the longitudinal direction X of the corrugated steel plate 1. The thickness of the vertical flange portion 2 is determined according to the strength and rigidity required for the earth retaining structure 200.

[0032] As shown in Figures 6 and 7, the reinforcing member 3 is a channel steel, and its inner bottom surface is positioned opposite the lower end of the corrugated steel plate 1. Also, as shown in Figures 5 and 6, the reinforcing member 3 is positioned with its inner bottom surface facing the lower ends of a pair of vertical flange portions 2, 2. The reinforcing member 3 is joined to the outer surface of the vertical flange portion 2 at both ends in the longitudinal direction X by welding. The length of the reinforcing member 3 is such that it does not protrude from the outer surface of the vertical flange portion 2. This is because the ends of the reinforcing member 3 may cause problems when joining the vertical flange portions 2 of adjacent earth retaining panels 100. The width of the vertical flange portion 2 is formed to match the width dimension of the web 30 of the reinforcing member 3. On the other hand, the reinforcing member 3 is not joined to the corrugated steel plate 1, and as shown in Figure 6, the inner surface of the web 30 is positioned in contact with the horizontal flange portion 10 of the corrugated steel plate 1. In this way, the reinforcing member 3 is integrated with the corrugated steel plate 1 and the vertical flange portion 2. The reinforcing member 3 does not necessarily need to be joined to the corrugated steel plate 1, but there is no particular problem if it is joined to the corrugated steel plate 1 by, for example, welding. For example, if the length of the longitudinal direction X of the reinforcing member 3 is long, it may be intermittently welded to the corrugated steel plate 1 in order to maintain its shape.

[0033] As shown in Figure 6, the reinforcing member 3 is configured to have a size that creates a gap S between the flange 31 and the valley portion 1b. This is because a gap S is necessary to allow a worker's hand or tools to enter the space in the valley portion 1b of the corrugated steel plate 1 when joining the earth retaining panels 100 which are arranged vertically and horizontally. Also, as shown in Figures 6 and 7, the web 30 of the reinforcing member 3 has a joining hole 30a formed in the web 30 of the reinforcing member 3 at a position corresponding to the joining hole 10a formed in the horizontal flange portion 10 of the corrugated steel plate 1.

[0034] Furthermore, the reinforcing member 3 is not limited to the channel steel formed by rolling, but may also be formed by welding together a pair of steel plates that will form a pair of flanges and a steel plate that will form a web to create a channel shape. Since channel steel formed by rolling can be manufactured at a lower cost than channel steel formed by welding steel plates, it is suitable for manufacturing the earth retaining panel 100.

[0035] Furthermore, although the configuration shown for the reinforcing member 3 is positioned at the lower end of the corrugated steel plate 1, it is not limited to this configuration, and may also be positioned at the upper and lower ends of the corrugated steel plate 1, respectively.

[0036] Next, the connection structure of the retaining wall panel 100 according to this embodiment 1 will be described. The retaining wall panel 100 according to this embodiment 1 is placed in the excavation hole 301 where high earth pressure acts, or in the deeper part of the excavation hole 301, and then connected to the retaining wall panel 101 already installed as shown in Figure 2. When connecting the retaining wall panel 100 according to this embodiment 1 with the upper retaining wall panel 101 already installed, the horizontal flange portions 10 of each are butted vertically to align the position of the connecting holes 10a, the shafts of bolts are passed through the connecting holes 10a of each, and the shafts are fastened with nuts. Incidentally, the retaining wall panel 100 according to this embodiment 1 has a structure in which the reinforcing member 3 is integrated with the corrugated steel plate 1 and the vertical flange portion 2, so it is heavy. However, when the retaining wall panel 100 is placed in the predetermined position in the excavation hole 301, it is handled by heavy machinery, so the heavy weight of the retaining wall panel 100 does not increase the burden on the workers, and rather the connection work is made easier, thus improving work efficiency.

[0037] Figure 8 is an explanatory diagram showing a state in which earth retaining panels 100 according to Embodiment 1 are arranged vertically and connected. The upper earth retaining panel 100 has a configuration in which the reinforcing member 3 is provided only at the lower end of the corrugated steel plate 1. On the other hand, the lower earth retaining panel 100 has a configuration in which the reinforcing member 3 is provided at both the upper and lower ends of the corrugated steel plate 1. When arranging and connecting earth retaining panels 100 according to Embodiment 1 vertically, as shown in Figure 8, the outer surfaces of the webs 30 of each reinforcing member 3 are butted vertically to align the positions of the connecting holes 10a and joining holes 30a, the shafts of the bolts 5 are passed through the connecting holes 10a and joining holes 30a, and the shafts are fastened with nuts 6. In this way, the reinforcing members 3 of the vertically adjacent earth retaining panels 100 are joined and connected together with the horizontal flange portion 10 of the corrugated steel plate 1 using bolts 5 and nuts 6.

[0038] Furthermore, when connecting the retaining wall panel 101 shown in Figure 2 to the lower part of the retaining wall panel 100 according to this embodiment 1, which is positioned on the lower level, the lateral flange portion 10 of the corrugated steel plate 1 of the lower retaining wall panel 101 is butted against the outer surface of the web 30 of the reinforcing member 3 of the retaining wall panel 100, and the positions of the connecting holes 10a and joining holes 30a are aligned. Then, bolts are inserted through the connecting holes 10a and joining holes 30a of the retaining wall panel 100 and the connecting hole 10a of the retaining wall panel 101, and the shafts of the bolts are fastened with nuts. In this way, the reinforcing member 3 of the retaining wall panel 100 is joined to the lateral flange portion 10 of the retaining wall panel 101 together with the lateral flange portion 10 of the corrugated steel plate 1 using bolts and nuts.

[0039] Figure 9 is an explanatory diagram showing the state in which the earth retaining panels 100 according to Embodiment 1 are arranged and connected in the circumferential direction of the excavation hole 301. As shown in Figure 9, when connecting adjacent earth retaining panels 100 in the circumferential direction of the excavation hole 301, the vertical flange portions 2 adjacent to each other on the left and right are brought together to align the position of the connecting holes 2a, the shafts of the bolts 7 are passed through the connecting holes 2a of each other, and the shafts are fastened with nuts 8. In other words, with the earth retaining panels 100 according to Embodiment 1, the reinforcing members 3 can be installed along the circumferential direction without bolting adjacent reinforcing members 3 together, simply by joining the vertical flange portions 2 of adjacent earth retaining panels 100 along the circumferential direction of the excavation hole 301. Note that instead of bolts and nuts, connecting devices such as clips may be used to connect the earth retaining panels 100 adjacent to each other on the left and right.

[0040] As described above, the earth retaining panel 100 according to this embodiment 1 comprises a corrugated steel plate 1 formed such that the peaks 1a and valleys 1b of the corrugated steel plate extend along the longitudinal direction X, a pair of vertical flange portions 2 provided at both ends of the corrugated steel plate 1 in the longitudinal direction X, and a reinforcing member 3 extending along the longitudinal direction X of the corrugated steel plate 1 and provided at least one end of the ends of the corrugated steel plate 1 in the short direction Y. The reinforcing member 3 is joined to the outer surface of the vertical flange portion 2 at both ends in the longitudinal direction X.

[0041] Therefore, in this embodiment 1, the retaining wall panel 100 can be installed along the circumferential direction of the excavation hole 301 by joining the vertical flange portions 2 of adjacent retaining wall panels 100 along the circumferential direction, without having to bolt adjacent reinforcing members 3 together via joint plates. Thus, the bolting work of reinforcing members 3 together at the construction site can be omitted, improving the work efficiency of the construction work. In addition, by joining the vertical flange portions 2, 2 of the retaining wall panel 100, the same improvement in strength and rigidity as when reinforcing members 3 are joined with joint plates can be achieved.

[0042] Figure 10 is a longitudinal cross-sectional view showing a modified example of the earth retaining panel according to Embodiment 1. The reinforcing member 3 may be made of steel material with an H-shaped cross-section, as shown in Figure 10, instead of the channel steel described above. In this case, the reinforcing member 3 may be formed as rolled H-shaped steel or as built H-shaped steel. Rolled H-shaped steel is H-shaped steel formed by rolling. Built H-shaped steel is formed by welding together a pair of steel plates that will form a pair of flanges and a steel plate that will form a web to create an H-shape. Rolled H-shaped steel is preferable for manufacturing the earth retaining panel 100 because it can be manufactured at a lower cost than built H-shaped steel.

[0043] Embodiment 2. Next, the retaining wall panel 100A according to Embodiment 2 will be described with reference to Figures 11 and 12. Figure 11 is a longitudinal cross-sectional view showing the retaining wall panel 100A according to Embodiment 2. Figure 12 is an explanatory diagram showing the retaining wall panels 100A according to Embodiment 2 arranged vertically and connected. Note that components identical to those of the retaining wall panel 100 described in Embodiment 1 are denoted by the same reference numerals, and their descriptions are omitted as appropriate.

[0044] As shown in Figure 11, the retaining wall panel 100A according to Embodiment 2 comprises a corrugated steel plate 1 formed such that the peaks 1a and valleys 1b of the corrugated steel plate extend along the longitudinal direction X, a pair of vertical flange portions 2 provided at both ends of the corrugated steel plate 1 in the longitudinal direction X, and a reinforcing member 3A extending along the longitudinal direction X of the corrugated steel plate 1 and provided at the lower end of the corrugated steel plate 1. The corrugated steel plate 1 and the vertical flange portions 2 are the same as those in Embodiment 1.

[0045] As shown in Figure 11, the reinforcing member 3A is an angle steel, and its inner bottom surface of the bend is positioned opposite the lower end of the corrugated steel plate 1. Furthermore, the reinforcing member 3A is positioned so that the side portion 33 of the bend faces the ground. By positioning the side portion 33 of the bend facing the ground, a working space can be secured on the inner side of the corrugated steel plate 1, and the presence of the reinforcing member 3A does not get in the way when connecting the earth retaining panels 100A that are arranged vertically and horizontally, making the work easier.

[0046] The reinforcing member 3A is positioned with its bent inner bottom surface facing the lower ends of a pair of vertical flange portions. The reinforcing member 3A is joined to the outer surface of the vertical flange portion 2 by welding at both ends in the longitudinal direction X. The length of the reinforcing member 3A is such that it does not protrude from the outer surface of the vertical flange portion 2. This is because the ends of the reinforcing member 3A may cause problems when joining the vertical flange portions 2 of adjacent earth retaining panels 100. The width of the vertical flange portion 2 is formed to match the width dimension of the bottom portion 32 of the reinforcing member 3A. On the other hand, the reinforcing member 3A is not joined to the corrugated steel plate 1, but is positioned with its bottom portion 32 in contact with the horizontal flange portion 10 of the corrugated steel plate 1. In this way, the reinforcing member 3A is integrated with the corrugated steel plate 1 and the vertical flange portion 2. The reinforcing member 3A does not need to be joined to the corrugated steel plate 1, but there is no particular problem if it is joined to the corrugated steel plate 1 by welding, for example. For example, if the length of the reinforcing member 3A in the longitudinal direction X is long, it may be intermittently welded to the corrugated steel plate 1 in order to maintain its shape.

[0047] Furthermore, as shown in Figure 11, a joining hole 30a is formed in the bottom portion 32 of the reinforcing member 3A at a position corresponding to the connecting hole 10a formed in the lateral flange portion 10 of the corrugated steel sheet 1. Although the configuration shown for the reinforcing member 3A is positioned at the lower end of the corrugated steel sheet 1, it is not limited to this configuration and may be positioned at the upper and lower ends of the corrugated steel sheet 1, respectively.

[0048] Furthermore, the reinforcing member 3A is not limited to the angle steel formed by rolling, but may also be formed by butting the edges of two steel plates together and welding them so that the cross-sectional shape is L-shaped. Since angle steel formed by rolling can be manufactured at a lower cost than that formed by welding steel plates, it is suitable for manufacturing the earth retaining panel 100A.

[0049] The retaining wall panel 100A according to this second embodiment is also placed in the excavation hole 301 where high earth pressure acts, or in the deeper part of the excavation hole 301, and then connected to the already installed retaining wall panel 101. When connecting the already installed upper retaining wall panel 101 with the retaining wall panel 100A according to this second embodiment, the lateral flange portions 10 of each are butted vertically to align the positions of the connecting holes 10a, the shafts of bolts are passed through the connecting holes 10a of each, and the shafts are fastened with nuts.

[0050] Figure 12 is an explanatory diagram showing a state in which earth retaining panels 100A according to Embodiment 2 are arranged vertically and connected. The upper earth retaining panel 100A has a configuration in which the reinforcing member 3A is provided only at the lower end of the corrugated steel plate 1. On the other hand, the lower earth retaining panel 100A has a configuration in which the reinforcing member 3A is provided at both the upper and lower ends of the corrugated steel plate 1. When arranging and connecting earth retaining panels 100A according to Embodiment 2 vertically, as shown in Figure 12, the outer surfaces of the bottom portions 32 of each reinforcing member 3A are butted vertically and horizontally to align the positions of the connecting holes 10a and joining holes 30a, the shafts of the bolts 5 are passed through the connecting holes 10a and joining holes 30a, and the shafts are fastened with nuts 6. In this way, the reinforcing members 3A of the vertically adjacent earth retaining panels 100A are joined and connected together with the horizontal flange portions 10 of the corrugated steel plate 1 using bolts 5 and nuts 6. Furthermore, instead of bolts 5 and nuts 6, connecting devices such as clips may be used to connect adjacent corrugated steel plates 1 vertically.

[0051] Furthermore, when arranging and connecting the retaining wall panel 101 shown in Figure 2 to the lower part of the retaining wall panel 100A according to this embodiment 2, which is positioned on the lower level, the lateral flange portion 10 of the corrugated steel plate 1 of the lower retaining wall panel 101 is abutted against the outer surface of the bottom portion 32 of the reinforcing member 3A of the retaining wall panel 100A, and the positions of the connecting holes 10a and joining holes 30a are aligned. Then, bolts are inserted through the connecting holes 10a and joining holes 30a of the retaining wall panel 100A and the connecting hole 10a of the retaining wall panel 101, and the shafts of the bolts are fastened with nuts. In this way, the reinforcing member 3A of the retaining wall panel 100A is joined to the lateral flange portion 10 of the retaining wall panel 101 together with the lateral flange portion 10 of the corrugated steel plate 1 using bolts and nuts. Note that instead of bolts and nuts, connecting devices such as clips may be used to connect adjacent corrugated steel plates 1 vertically.

[0052] When connecting adjacent retaining wall panels 100A in the circumferential direction of the excavation hole 301, for example, as shown in Figure 9, the adjacent vertical flange portions 2 are butted together to align the position of the connecting holes 2a, the shafts of the bolts 7 are passed through the connecting holes 2a, and the shafts are fastened with nuts 8. In other words, with the retaining wall panels 100A according to this second embodiment, the reinforcing members 3A can be installed along the circumferential direction simply by joining the vertical flange portions 2 of adjacent retaining wall panels 100A along the circumferential direction of the excavation hole 301, without having to bolt adjacent reinforcing members 3A to each other. Therefore, the bolting work of connecting reinforcing members 3A at the construction site can be omitted, improving the work efficiency of the construction work. Note that instead of bolts 7 and nuts 8, connecting devices such as clips may be used to connect adjacent retaining wall panels 100A.

[0053] Furthermore, although the earth retaining panel 100A according to this second embodiment has lower rigidity and strength compared to the earth retaining panel 100 having a reinforcing member 3 made of channel steel described in the first embodiment, it is possible to secure a working space on the inner side of the corrugated steel plate 1, so when joining earth retaining panels 100A arranged vertically and horizontally, it provides better workability for workers working inside the excavation hole 301.

[0054] Although not shown in the diagram, the reinforcing member 3A may be made of T-shaped steel instead of the angle steel described above. In this case, the reinforcing member 3 may be a T-shaped steel formed by rolling, or it may be formed by welding together two steel plates in a T-shape.

[0055] Embodiment 3. Next, the retaining wall panel 100B according to this third embodiment will be described with reference to Figure 13. Figure 13 is a longitudinal cross-sectional view showing the retaining wall panel 100B according to this third embodiment. Note that components identical to those described in the retaining wall panel 100 in the first embodiment and the retaining wall panel 100A in the second embodiment are denoted by the same reference numerals, and their descriptions are omitted as appropriate.

[0056] As shown in Figure 13, the retaining wall panel 100B according to Embodiment 3 comprises a corrugated steel plate 11 formed such that the peaks 1a and valleys 1b of the corrugated steel plate extend along the longitudinal direction X, a pair of vertical flange portions 2 provided at both ends of the corrugated steel plate 11 in the longitudinal direction X, and a reinforcing member 3 extending along the longitudinal direction X of the corrugated steel plate 11 and provided at the lower end of the corrugated steel plate 11.

[0057] The corrugated steel plate 11 of the earth retaining panel 100B according to Embodiment 3 is a so-called liner plate in which the corrugated cross section is formed in a sine curve shape. This corrugated steel plate 11 has a thickness of, for example, about 2.7 mm to 7 mm. The corrugated steel plate 11 has transverse flange portions 10 at both ends in the short direction Y, which are formed by bending the edges of the corrugation. Multiple connecting holes 10a are formed in the transverse flange portions 10 along the longitudinal direction X for connecting adjacent corrugated steel plates 11 stacked vertically in the direction of the hole axis of the excavation hole 301.

[0058] The vertical flange portion 2 and the reinforcing member 3 are the same as those in Embodiments 1 and 2. The reinforcing member 3 may be a channel steel or H-shaped steel as shown in Embodiment 1, or an angle steel or T-shaped steel as shown in Embodiment 2. Although the configuration shown for the reinforcing member 3 is positioned at the lower end of the corrugated steel plate 11, it is not limited to this configuration and may be positioned at the upper and lower ends of the corrugated steel plate 11, respectively.

[0059] When arranging and connecting the earth retaining panels 100B according to this third embodiment vertically, for example, as shown in Figure 8, the outer surfaces of the webs 30 of the reinforcing members 3 are butted vertically to align the positions of the connecting holes 10a and joining holes 30a, the shafts of the bolts 5 are passed through the connecting holes 10a and joining holes 30a, and the shafts are fastened with nuts 6. In this way, the reinforcing members 3 of the vertically adjacent earth retaining panels 100B are joined and connected together with the horizontal flange portions 10 of the corrugated steel plates 11 using bolts 5 and nuts 6. Note that when using the reinforcing member 3A described in the second embodiment, the means for connecting the vertically adjacent corrugated steel plates 11 may be, for example, a clip or other fastener instead of bolts 5 and nuts 6.

[0060] When connecting adjacent retaining wall panels 100B in the circumferential direction of the excavation hole 301, for example, as shown in Figure 9, the adjacent vertical flange portions 2 are butted together to align the position of the connecting holes 2a, the shafts of the bolts 7 are passed through the connecting holes 2a, and the shafts are fastened with nuts 8. In other words, the retaining wall panels 100B according to this embodiment 3 can also be installed along the circumferential direction of the excavation hole 301 by joining the vertical flange portions 2 of adjacent retaining wall panels 100B along the circumferential direction, without having to bolt adjacent reinforcing members 3 together via joint plates. Therefore, the bolting work of connecting reinforcing members 3 at the construction site can be omitted, improving the work efficiency of the construction work. Note that instead of bolts 7 and nuts 8, connecting devices such as clips may be used to connect adjacent retaining wall panels 100B on the left and right sides.

[0061] Embodiment 4. Next, the retaining wall panel 100C according to this fourth embodiment will be described with reference to Figures 14 and 15. Figure 14 is a longitudinal cross-sectional view showing the retaining wall panel 100C according to this fourth embodiment. Note that components identical to those described in the above embodiments of the retaining wall panels 100, 100A, and 100B are denoted by the same reference numerals, and their descriptions are omitted as appropriate.

[0062] As shown in Figure 14, the earth retaining panel 100C according to Embodiment 4 comprises a corrugated steel plate 12 formed such that the peaks 1a and valleys 1b of the corrugated steel plate extend along the longitudinal direction X, a pair of vertical flange portions 2 provided at both ends of the corrugated steel plate 12 in the longitudinal direction X, and a reinforcing member 3 extending along the longitudinal direction X of the corrugated steel plate 12 and provided at the lower end of the corrugated steel plate 12.

[0063] In this fourth embodiment, the corrugated steel sheet 12 is formed so that its corrugated cross-section is angular. Compared to the corrugated steel sheet 1 in the first embodiment, this corrugated steel sheet 12 does not have a lateral flange portion 10 at the lower end in the short direction Y where the reinforcing member 3 is provided. As described in the first embodiment, adjacent corrugated steel sheets 1 are connected by butting the lateral flange portions 10 together and fastening the shafts of bolts inserted through the connecting holes 10a with nuts. However, at the end in the short direction Y where the reinforcing member 3 is provided, the reinforcing member 3 also performs the function of the lateral flange portion 10, so there is no need to specifically provide the lateral flange portion 10. However, in the corrugated steel sheet 12 of this fourth embodiment, it is desirable to weld the corrugated edge and the reinforcing member 3 together to form a single unit. It is not necessarily required to weld the corrugated edge and the reinforcing member 3 in the short direction Y, but welding allows for integration and improves load-bearing capacity.

[0064] In this embodiment 4, if reinforcing members 3 are provided at both ends of the corrugated steel sheet 12 in the short direction Y, the transverse flange portions 10 will not be provided at those ends.

[0065] The retaining wall panel 100C according to this fourth embodiment is also placed in the excavation hole 301 where high earth pressure acts, or in the deeper part of the excavation hole 301, and then connected to the already installed retaining wall panel 101. When connecting the already installed upper retaining wall panel 101 with the retaining wall panel 100C according to this fourth embodiment, the lateral flange portions 10 of each are butted vertically to align the positions of the connecting holes 10a, the shafts of bolts are passed through the connecting holes 10a of each, and the shafts are fastened with nuts.

[0066] Figure 15 is an explanatory diagram showing a state in which earth retaining panels 100C according to Embodiment 4 are arranged vertically and connected. The upper earth retaining panel 100C has a configuration in which the reinforcing member 3 is provided only at the lower end of the corrugated steel plate 12. The upper earth retaining panel 100C does not have a horizontal flange portion 10 at the lower end in the short direction Y. On the other hand, the lower earth retaining panel 100C has a configuration in which the reinforcing member 3 is provided at both the upper and lower ends of the corrugated steel plate 12. The lower earth retaining panel 100C does not have horizontal flange portions 10 at both ends in the short direction Y. When arranging and connecting earth retaining panels 100C according to Embodiment 4 vertically, as shown in Figure 15, the outer surfaces of the webs 30 of each reinforcing member 3 are butted vertically to align the positions of the joining holes 30a, the shafts of the bolts 5 are passed through the joining holes 30a of each, and the shafts are fastened with nuts 6. As a result, adjacent retaining wall panels 100C are connected by the reinforcing members 3 being joined together with bolts 5 and nuts 6.

[0067] Furthermore, when connecting the retaining wall panel 101 shown in Figure 2 to the lower part of the retaining wall panel 100C according to this embodiment 4, which is positioned on the lower level, the horizontal flange portion 10 of the corrugated steel plate 12 of the lower retaining wall panel 101 is butted against the outer surface of the web 30 of the reinforcing member 3 of the retaining wall panel 100C, and the positions of the connecting hole 10a and the joining hole 30a are aligned. Then, bolts are inserted through the joining hole 30a of the retaining wall panel 100C and the connecting hole 10a of the retaining wall panel 101, and the shafts of the bolts are fastened with nuts.

[0068] When connecting adjacent retaining wall panels 100C in the circumferential direction of the excavation hole 301, for example, as shown in Figure 9, the adjacent vertical flange portions 2 are butted together to align the position of the connecting holes 2a, the shafts of the bolts 7 are passed through the connecting holes 2a, and the shafts are fastened with nuts 8. In other words, with the retaining wall panels 100C according to this embodiment 4, the reinforcing members 3 can be installed along the circumferential direction without bolting the adjacent reinforcing members 3 together, simply by joining the vertical flange portions 2 of adjacent retaining wall panels 100 along the circumferential direction of the excavation hole 301. Therefore, the bolting work of joining the reinforcing members 3 at the construction site can be omitted, improving the work efficiency of the construction work. Note that instead of bolts 7 and nuts 8, connecting devices such as clips may be used to connect adjacent retaining wall panels 100C.

[0069] As described above, the earth retaining panel 100C according to this embodiment 4 omits the lateral flange portion 10 at at least one end in the short direction Y of the corrugated steel plate 12, thus reducing manufacturing effort and material costs, and consequently lowering manufacturing costs. Furthermore, even when bending is required for application to, for example, a circular shaft, the earth retaining panel 100C can be easily bent because it does not have the lateral flange portion 10. In addition, since the earth retaining panel 100C is lighter due to the omission of the lateral flange portion 10, the burden of carrying it is reduced, and workability during construction can be improved.

[0070] In addition, although the earth retaining panel 100C according to this embodiment 4 has been described as having a reinforcing member 3 made of channel steel as described in Embodiment 1, it is not limited to this configuration. The earth retaining panel 100C may also have a reinforcing member 3 made of H-shaped steel as shown in Figure 10, a reinforcing member 3A made of angle steel as described in Embodiment 2, or a reinforcing member made of T-shaped steel. When using the reinforcing member 3A described in Embodiment 2, the means for connecting vertically adjacent corrugated steel plates 12 may be a connector such as a clip instead of a bolt 5 and a nut 8. Furthermore, the earth retaining panel 100C according to this embodiment 4 is not limited to a configuration having a corrugated steel plate 12 with a corrugated cross-section formed in a square wave shape, but may also have a configuration having a corrugated steel plate 11 with a corrugated cross-section formed in a sine curve shape as described in Embodiment 3.

[0071] Embodiment 5. Next, the manufacturing methods for the retaining wall panels 100, 100A, 100B, and 100C will be described with reference to Figures 16 to 21. Figure 16 is an explanatory diagram showing an example of the procedure for manufacturing the retaining wall panel. Figure 17 is an explanatory diagram showing the state in which both ends of the reinforcing member 3A are joined to the inner surface of the vertical flange portion 2. Note that components identical to those of the retaining wall panels 100, 100A, 100B, and 100C described in the above embodiment are denoted by the same reference numerals, and their descriptions are omitted as appropriate.

[0072] The manufacturing method for the earth retaining panel 100A is as follows: First, as shown in Figure 16(A), a pair of vertical flange portions 2 and a pair of reinforcing members 3A placed between the pair of vertical flange portions 2 are combined to form a rectangular frame. The reinforcing members 3A shown in Figure 16 are angle steel. The pair of reinforcing members 3A are arranged so that the bent sides 33 face each other on one of the longitudinal side edges of the vertical flange portion 2. Alternatively, instead of angle steel formed by rolling, the reinforcing members 3A may be formed by butting the edges of two steel plates together and welding them to create an L-shaped cross-section.

[0073] Then, as shown in Figure 16(B), the lower and upper ends of a pair of vertical flanges are positioned facing each other on the inner bottom surface of the bend of the reinforcing member 3A, and the outer surfaces of the vertical flanges 2 facing both ends of the reinforcing member 3A in the longitudinal direction are joined by welding to form a rectangular, annular frame 20 with the vertical flanges 2 and the reinforcing member 3A. Alternatively, as shown in Figure 17, the pair of reinforcing members 3A may be positioned so as to be sandwiched between the pair of vertical flanges 2, and the longitudinal end faces of the reinforcing members 3A may be abutted against the inner surfaces of the vertical flanges 2, and both ends may be welded to the vertical flanges 2. In short, as long as both ends of the reinforcing member 3A in the longitudinal direction can be joined to the vertical flanges 2, it may be joined to the inner surfaces of the vertical flanges 2 or to the outer surfaces of the vertical flanges 2.

[0074] Finally, as shown in Figure 16(C), the corrugated steel plate 1 is fitted into the frame 20, and both ends of the corrugated steel plate 1 are welded to the opposing vertical flange portions 2 to complete the earth retaining panel 100A. Note that the reinforcing member 3A does not need to be joined to the corrugated steel plate 1, but it may be intermittently welded to the corrugated steel plate 1, for example, to maintain its shape.

[0075] Furthermore, the retaining wall panel 100A may be manufactured with the frame 20 lying on the ground or with the frame 20 standing upright on the ground. In short, the retaining wall panel 100A is manufactured in a way that is easy for workers to handle.

[0076] As described above, the manufacturing method for the earth retaining panel 100A according to this embodiment 5 includes the steps of: combining a pair of vertical flange portions 2 and a reinforcing member 3A positioned between the pair of vertical flange portions 2 to form a frame; joining the vertical flange portions 2 facing both ends of the reinforcing member 3A to form a frame body 20 with the vertical flange portions 2 and the reinforcing member 3A; and fitting the corrugated steel plate 1 into the inside of the frame body 20 and joining the corrugated steel plate 1 to the vertical flange portions 2. In other words, in the manufacturing method for the earth retaining panel 100A according to this embodiment 5, the corrugated steel plate 1 is fitted into the inside of the frame body 20 after the frame body 20 has been formed, so dimensional errors of the corrugated steel plate 1 can be absorbed inside the frame body 20, and variations in the accuracy of the entire earth retaining panel can be reduced.

[0077] Figure 18 is an explanatory diagram showing a modified example 1 of the frame 20 in the manufacturing method of the earth retaining panel 101A. In the frame 21 shown in Figure 18, of the pair of reinforcing members 3A, the bent side portion 33 of the reinforcing member 3A located at the top in the direction of the hole axis of the excavation hole faces the excavation hole side, and the bent side portion 33 of the reinforcing member 3A located at the bottom in the direction of the hole axis of the excavation hole faces the ground side. When fitting the corrugated steel plate 1 into the frame 21 of Figure 18, with the corrugated steel plate 1 at an angle, the lower part of the corrugated steel plate 1 is inserted between the lower reinforcing member 3A and the upper part of the corrugated steel plate 1 is fitted into the space of the upper reinforcing member 3A. Then, both ends of the corrugated steel plate 1 are welded to the opposing vertical flange portions 2 to complete the earth retaining panel 100A. Alternatively, the upper part of the corrugated steel plate 1 may be inserted between the upper reinforcing members 3A and the lower part of the corrugated steel plate 1 may be fitted into the space of the lower reinforcing member 3A.

[0078] Figure 19 is an explanatory diagram showing a modified example 2 of the frame 20 in the manufacturing method of the earth retaining panel 100. In the frame 22 shown in Figure 19, one reinforcing member 3A, which is positioned at the top in the direction of the hole axis of the excavation hole, is made of angle steel, and the other reinforcing member 3, which is positioned at the bottom in the direction of the hole axis of the excavation hole, is made of channel steel. When fitting the corrugated steel plate 1 into the frame 22 of Figure 19, with the corrugated steel plate 1 at an angle, the lower part of the corrugated steel plate 1 is inserted into the groove of the reinforcing member 3, and the upper part of the corrugated steel plate 1 is fitted into the space of the portion where the reinforcing member 3A is provided. Then, both ends of the corrugated steel plate 1 are welded to the opposing vertical flange portions 2 to complete the earth retaining panel 100.

[0079] Furthermore, the frame 22 may have one reinforcing member 3A positioned at the lower part in the axial direction of the borehole as an angle steel, and the other reinforcing member 3 positioned at the upper part in the axial direction of the borehole as a channel steel. Alternatively, instead of an angle steel formed by rolling, the reinforcing member 3A may be formed by welding the edges of two steel plates together to create an L-shaped cross-section. Alternatively, instead of a channel steel formed by rolling, the reinforcing member 3 may be formed by welding together a pair of steel plates that form a flange and a steel plate that forms a web to create a channel shape.

[0080] In addition, the reinforcing member 3 may be made of steel material with an H-shaped cross-section, for example, as shown in Figure 10, instead of the channel steel described above. In this case, the reinforcing member 3 may be formed as rolled H-shaped steel or as built H-shaped steel.

[0081] Figure 20 is an explanatory diagram showing a modification 3 of the frame 20 in the manufacturing method of the earth retaining panel 100A. The frame 23 shown in Figure 20 is composed of one reinforcing member 3A and a pair of vertical flange portions 2. The reinforcing member 3A is made of angle steel. In Figure 20, the ends of the reinforcing member 3A are joined to the opposing vertical flange portions 2, and the vertical flange portions 2 and the reinforcing member 3A form a concave frame 23. A corrugated steel plate 1 is fitted inside this frame 23, and the ends of the corrugated steel plate 1 are welded to the opposing vertical flange portions 2 to complete the earth retaining panel 100A as shown in Figure 11.

[0082] The reinforcing member 3A may be positioned at the lower part of the borehole in the axial direction, or at the upper part of the borehole in the axial direction. Alternatively, instead of an angle steel formed by rolling, the reinforcing member 3A may be formed by butting the edges of two steel plates together and welding them to create an L-shaped cross-section.

[0083] Figure 21 is an explanatory diagram showing a modified example 4 of the frame 20 in the manufacturing method of the earth retaining panel 100. The frame 24 shown in Figure 21 is composed of one reinforcing member 3 and a pair of vertical flange portions 2. The reinforcing member 3 is channel steel. In Figure 21, the ends of the reinforcing member 3 are joined to the opposing vertical flange portions 2, and the vertical flange portions 2 and the reinforcing member 3 form a concave frame 24. A corrugated steel plate 1 is fitted into the inside of this frame 24, and the ends of the corrugated steel plate 1 are welded to the opposing vertical flange portions 2 to complete the earth retaining panel 100 as shown in Figures 5 and 6. Note that the reinforcing member 3 may be formed by welding together a pair of steel plates that will form a pair of flanges and a steel plate that will form a web to form a groove shape, instead of the channel steel formed by rolling. Alternatively, the reinforcing member 3 may be made of steel material with an H-shaped cross-section, as shown in Figure 10, instead of the channel steel. In this case, the reinforcing member 3 may be formed as a rolled H-beam or as a built H-beam.

[0084] In Figures 16 to 21, corrugated steel sheets with a corrugated cross-section in the shape of a square wave are used as an example, but the invention is not limited to corrugated steel sheets with a corrugated cross-section in the shape of a square wave. It may also be a corrugated steel sheet with a corrugated cross-section in the shape of a sine wave, known as a liner plate. Alternatively, instead of corrugated steel sheet 1, a steel material with an H-shaped cross-section, a steel material with a groove-shaped cross-section, a combination of these steel materials, or a steel material with other shapes may be used. In short, the invention is not limited to corrugated steel sheet 1, as long as it is a steel material that can be used to construct an earth retaining panel.

[0085] The earth retaining panels (100, 100A, 100B, 100C), the earth retaining structure 200, and the method for manufacturing the earth retaining panels have been described above based on embodiments, but the configuration is not limited to the embodiments described above. For example, the configuration of the earth retaining panels (100, 100A, 100B, 100C) described above is just one example and may include other components. Also, the construction method for the earth retaining structure 200 described with reference to Figure 4 is just one example and is not limited to the embodiments described above. In short, the earth retaining panels (100, 100A, 100B, 100C) and the earth retaining structure 200 include design changes and variations in application that are normally performed by those skilled in the art, without departing from the technical concept.

[0086] The earth retention panels (100, 100A, 100B, 100C) described above may also include combinations of the features shown in the following appendices 1 to 15. These combinations are shown below.

[0087] (Note 1) A retaining wall panel used to construct a retaining wall structure by being installed in an excavated hole formed by excavating the ground, A corrugated steel sheet formed such that the peaks and valleys of the wave extend along the longitudinal direction, A pair of vertical flange portions provided at both ends in the longitudinal direction of the corrugated steel sheet, The corrugated steel sheet comprises a reinforcing member that extends along the longitudinal direction of the corrugated steel sheet and is provided at least one end of the short ends of the corrugated steel sheet, The reinforcing member is a retaining wall panel in which both ends in the longitudinal direction are joined to the outer surface of the vertical flange portion.

[0088] (Note 2) The earth retaining panel as described in Appendix 1, wherein the reinforcing member has a concave cross-sectional shape and is positioned with the inner bottom surface of the groove facing the upper or lower end of the corrugated steel plate.

[0089] (Note 3) The earth retaining panel as described in Appendix 1, wherein the reinforcing member has an L-shaped cross-section and is positioned with the inner surface of the bend facing the upper or lower end of the corrugated steel plate.

[0090] (Note 4) The corrugated steel plate is configured to have a corrugated cross-section that is angularly shaped, as described in any one of the appendices 1 to 3.

[0091] (Note 5) The corrugated steel plate is configured to have a sine wave-shaped cross-section, as described in any one of the appendices 1 to 3, for the earth-retaining panel.

[0092] (Note 6) The corrugated steel plate has a transverse flange portion at at least one end of both ends in the short direction, as described in Appendix 4 or 5, for the earth retaining panel.

[0093] (Note 7) The transverse flange portion of the corrugated steel sheet has multiple connecting holes formed along its longitudinal direction. The reinforcing member is a retaining wall panel as described in Appendix 6, wherein a connecting hole is formed at a position corresponding to the connecting hole.

[0094] (Note 8) A retaining structure comprising a structure assembled by connecting multiple retaining panels, each described in one of the appendices 1 to 7, along the wall surface of the excavation hole.

[0095] (Note 9) The earth retaining structure described in Appendix 8, wherein adjacent earth retaining panels in the circumferential direction of the excavation hole are connected by joining adjacent vertical flange portions.

[0096] (Note 10) The earth retaining structure according to Appendix 8 or 9, wherein adjacent earth retaining panels in the axial direction of the excavated hole are joined by butting adjacent reinforcing members together, or by butting adjacent reinforcing members together with the ends of the corrugated steel plates in the shorter direction.

[0097] (Note 11) A method for manufacturing earth retaining panels used to construct earth retaining structures by being installed in excavated holes formed by excavating the ground, A step of combining a pair of vertical flange portions and a reinforcing member positioned between the pair of vertical flange portions so as to form a frame, The process involves joining the vertical flange portions facing both ends of the reinforcing member, thereby forming a frame with the vertical flange portions and the reinforcing member. A method for manufacturing an earth retaining panel, comprising the steps of fitting steel material into the inside of the frame and joining the steel material to the vertical flange portion.

[0098] (Note 12) The method for manufacturing an earth retaining panel as described in Appendix 11, wherein the steel material is a corrugated steel plate formed such that the peaks and valleys of the corrugated shape extend along the longitudinal direction, and both ends of the corrugated steel plate are joined to the opposing vertical flanges by welding.

[0099] (Note 13) A pair of vertical flange portions and a pair of reinforcing members positioned between the pair of vertical flange portions are combined to form a frame. A method for manufacturing an earth retaining panel according to appendix 11 or 12, comprising joining the vertical flange portion opposite to both ends of the reinforcing member, thereby forming an annular frame with the vertical flange portion and the reinforcing member.

[0100] (Note 14) The method for manufacturing an earth retaining panel as described in Appendix 13, wherein at least one of the pair of reinforcing members is a steel material with an L-shaped cross-section.

[0101] (Note 15) A method for manufacturing an earth retaining panel according to Appendix 11 or 12, comprising joining the vertical flange portion opposite to both ends of the reinforcing member, thereby forming a concave frame with the vertical flange portion and the reinforcing member. [Explanation of symbols]

[0102] 1 Corrugated steel plate, 1a Peak section, 1b Valley section, 1c Web, 2 Vertical flange section, 2a Connecting hole, 3, 3A Reinforcement member, 4 Corner member, 5 Bolt, 6 Nut, 7 Bolt, 8 Nut, 10 Horizontal flange section, 10a Connecting hole, 11 Corrugated steel plate, 12 Corrugated steel plate, 20, 21, 22, 23, 24 Frame, 30 Web, 30a Joining hole, 31 Flange, 32 Bottom section, 33 Side section, 100, 100A, 100B, 100C, 101, 102 Earth retaining panel, 200 Earth retaining structure, 201 Structure, 300 Ground, 301 Excavation hole, 400 Lattice, X Longitudinal direction, Y Shortitudinal direction, S Gap.

Claims

1. A retaining wall panel used to construct a retaining wall structure by being installed in an excavated hole formed by excavating the ground, A corrugated steel sheet formed such that the peaks and valleys of the wave extend along the longitudinal direction, A pair of vertical flange portions provided at both ends in the longitudinal direction of the corrugated steel sheet, The corrugated steel sheet comprises a reinforcing member that extends along the longitudinal direction of the corrugated steel sheet and is provided at least one end of the short ends of the corrugated steel sheet, The corrugated steel sheet has a transverse flange portion at at least one of its ends in the short direction. The reinforcing member is positioned with its inner surface in contact with the transverse flange portion and is not joined to the corrugated steel plate. A retaining wall panel in which both ends in the longitudinal direction are joined to the outer surface of the vertical flange portion by welding.

2. The earth retaining panel according to claim 1, wherein the reinforcing member has a concave cross-sectional shape and is positioned with the inner bottom surface of the groove facing the upper or lower end of the corrugated steel plate.

3. The earth retaining panel according to claim 1, wherein the reinforcing member has an L-shaped cross-section and is positioned with the inner surface of the bend facing the upper or lower end of the corrugated steel plate.

4. The earth retaining panel according to claim 1, wherein the corrugated steel plate has a corrugated cross-section formed in a angular wave shape.

5. The earth retaining panel according to claim 1, wherein the corrugated steel plate has a configuration in which the corrugated cross-section is formed in the shape of a sine curve.

6. The transverse flange portion of the corrugated steel sheet has multiple connecting holes formed along its longitudinal direction. The earth retaining panel according to claim 1, wherein the reinforcing member has a connecting hole formed at a position corresponding to the connecting hole.

7. A retaining structure comprising a plurality of retaining panels according to claim 1 arranged along the wall surface of the excavation hole, and a structure assembled by connecting the retaining panels to each other.

8. The earth retaining structure according to claim 7, wherein adjacent earth retaining panels in the circumferential direction of the excavation hole are connected by joining adjacent vertical flange portions.

9. The earth retaining structure according to claim 7 or 8, wherein adjacent earth retaining panels in the axial direction of the excavated hole are joined by butting adjacent reinforcing members with each other, or by butting adjacent reinforcing members with the ends of the corrugated steel plates in the short direction.

10. A method for manufacturing earth retaining panels used to construct earth retaining structures by being installed in excavated holes formed by excavating the ground, A step of combining a pair of vertical flange portions and a reinforcing member positioned between the pair of vertical flange portions so as to form a frame, The process involves joining the vertical flange portion opposite to both ends of the reinforcing member by welding, thereby forming a frame with the vertical flange portion and the reinforcing member. The process involves fitting a corrugated steel plate, which has undulating peaks and valleys extending along its longitudinal direction, into the frame, and having a transverse flange portion at at least one end of its short-side ends, bringing the transverse flange portion into contact with the inner surface of the reinforcing member, and welding both ends of the corrugated steel plate to the opposing vertical flange portions, A method for manufacturing an earth retaining panel, wherein the reinforcing member is not joined to the corrugated steel plate.

11. A pair of vertical flange portions and a pair of reinforcing members positioned between the pair of vertical flange portions are combined to form a frame. A method for manufacturing an earth retaining panel according to claim 10, wherein the vertical flange portion opposite to both ends of the reinforcing member is joined to form an annular frame with the vertical flange portion and the reinforcing member.

12. The method for manufacturing an earth retaining panel according to claim 11, wherein at least one of the pair of reinforcing members is a steel material with an L-shaped cross-section.

13. A method for manufacturing an earth retaining panel according to claim 10, wherein the vertical flange portion opposite to both ends of the reinforcing member is joined to form a concave frame with the vertical flange portion and the reinforcing member.

Images