Soil retainer panel

Abstract

To provide a soil retainer panel that can reduce labor in manufacturing.SOLUTION: A soil retainer panel in this invention is a soil retainer panel used for constructing a soil retainer structure arranged along wall surfaces formed by excavating the ground, features a corrugated cross section, and comprises: a corrugated steel plate having crests and troughs alternately formed in a first direction; vertical flanges arranged at the end parts on a second direction crossing the first direction of the corrugated steel plate; and a pair of reinforcement members that is arranged at both end parts on the first direction of the corrugated steel plate, extending in a third direction crossing the first direction and the second direction, and is welded to the inner surface of the vertical flanges. The distance between the end surfaces on the first direction of the vertical flanges is shorter than that between the outer surfaces of the pair of reinforcement members.SELECTED DRAWING: Figure 4

Description

Technical Field

[0001] The present invention relates to a soil retaining panel, and more particularly to a soil retaining panel used for a soil retaining structure.

Background Art

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

[0003] As the depth of the excavation hole increases in the soil retaining structure, the earth pressure from the ground side increases, and the rigidity of only the corrugated steel sheets may be insufficient. Also, regardless of the depth, there may be a case where the earth pressure is large depending on the soil conditions and the like. Further, as the depth in the hole axis direction increases, the self-weight of the structure arranged above acts on the structure arranged below. For this reason, in the soil retaining structure, at a location where the rigidity is insufficient, an H-shaped steel called a reinforcing ring is sandwiched between the corrugated steel sheets adjacent to each other vertically 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, that is, the inside of the excavation hole, and joining the flange portions of adjacent H-shaped steels via a joint plate. The joint plate is applied to the flange portion on the ground side and the flange portion 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] As in Patent Document 1, an assembly work method of joining the flange portions of adjacent H-shaped steels via a joint plate is a work in a state where visual inspection is difficult, and in addition to the difficulty of assembly, there are concerns about safety confirmation.

[0007] Therefore, instead of H-shaped steel, for example, a reinforcing member such as channel steel is used, and a structure is proposed in which the reinforcing member is joined to the flange joint in a state of being sandwiched between the flange joints in advance. With this technique, the bolt joining work between the reinforcing members at the construction site is omitted, the assembly work becomes easy, and the safety is also improved. On the other hand, since the welded part (groove welded part) bulges, it becomes an obstacle to the assembly work between the flanges. Therefore, the bulging part of the welded part must be shaved and flattened, which takes time for the processing performed at the factory and increases the manufacturing cost of the members.

[0008] The present disclosure solves the above problems, and an object thereof is to provide a retaining panel having a reinforcing structure that can reduce the labor of processing performed at the factory.

Means for Solving the Problems

[0009] The retaining panel according to the present disclosure is a retaining panel used for constructing a retaining structure installed along a wall surface formed by excavating the natural ground, and has a corrugated cross-sectional shape, a corrugated steel plate in which ridges and valleys are arranged in parallel in a first direction, a vertical flange portion provided at an end portion in a second direction intersecting the first direction of the corrugated steel plate, and a pair of reinforcing members provided at both end portions of the corrugated steel plate in the first direction so as to extend in a third direction intersecting the first direction and the second direction, and joined to the inner surface of the vertical flange portion. The distance between the end faces of the vertical flange portion in the first direction is smaller than the distance between the outer surfaces of the pair of reinforcing members.

Effects of the Invention

[0010] In the present disclosure, the vertical flange portions and the reinforcing members are arranged offset from each other such that the distance between the end faces of the vertical flange portions is smaller than the distance between the outer surfaces of the pair of reinforcing members. For this reason, fillet welding becomes possible in joining the vertical flange portions and the reinforcing members, and since beveling for bevel welding is not required, the labor involved in processing can be reduced.

Brief Description of the Drawings

[0011]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Figure 8

Figure 9

Embodiments for Carrying Out the Invention

[0012] Hereinafter, embodiments of the present disclosure will be described with reference to the drawings. In each figure, the same or corresponding parts are denoted by the same reference numerals, and the description thereof will be omitted or simplified as appropriate. In addition, regarding the configuration shown in each figure, the shape, size, arrangement, etc. can be appropriately changed within the scope of the present invention. Further, in the present embodiment, terms indicating directions are appropriately used for easy understanding, but these notations are descriptions for convenience of explanation and do not limit the arrangement, direction, and orientation of devices, instruments, or parts, etc.

[0013] Embodiment 1. FIG. 1 is a perspective view schematically showing an example of a soil retaining structure 200 constituted by soil retaining panels 101 according to Embodiment 1. The soil retaining structure 200 is constructed, for example, when constructing a vertical shaft for constructing a foundation of a structure or a civil engineering structure such as a sump well constructed underground, such as for a sewer. The soil retaining structure 200 is constructed by stacking a plurality of annular structures 201 as shown in FIG. 1 in a plurality of stages along the axial direction of the excavation hole 301 in a vertical excavation hole 301 formed by excavating the ground 300. In Embodiment 1, the soil retaining structure 200 is formed in a rectangular tubular shape in plan view, but is not limited thereto. The soil retaining structure 200 can be formed, for example, in a circular, oval, elliptical, rectangular, or horseshoe shape in plan view, and is not limited to a tubular shape.

[0014] <Basic shape of the soil retaining panel 101> FIG. 2 is a perspective view showing the soil retaining panel 101 according to Embodiment 1. FIG. 3 is a longitudinal sectional view showing the soil retaining panel 101 according to Embodiment 1.

[0015] As shown in FIGS. 2 and 3, each structure 201 constituting the soil retaining structure 200 is configured by annularly arranging a plurality of soil retaining panels 101 formed using corrugated steel plates 1 having the same cross-sectional shape. The soil retaining panel 101 includes a single corrugated steel plate 1 formed such that the corrugated peaks 1a and valleys 1b extend along the longitudinal direction X, and vertical flange portions 2 provided at both end portions 12 in the longitudinal direction X of the corrugated steel plate 1.

[0016] <Corrugated steel plate 1> The corrugated steel plate 1 has a configuration in which a rolled steel plate is bent into a square wave shape so that the corrugated cross section is square wave shaped. The square wave shape in Embodiment 1 is, as an example, a trapezoidal wave shape with rounded corners. The corrugated steel plate 1 is, as an example, composed of three crest portions 1a and two trough portions 1b, and the crest portions 1a and the trough portions 1b are arranged in parallel in the Y direction. However, the number of the crest portions 1a and the trough portions 1b is not limited to the illustrated number. Note that the Y direction in FIG. 3 may be referred to as the first direction. Also, the longitudinal direction X may be referred to as the second direction.

[0017] When viewed from a viewpoint along the Z direction, the crest portions 1a and the trough portions 1b are formed so as to be substantially parallel. The Z direction may be referred to as the third direction. The corrugated steel plate 1 is formed by slightly inclining the web 1c connecting the crest portion 1a and the trough portion 1b with respect to the horizontal direction so that the bottom of the trough portion 1b becomes narrower. By slightly inclining the web 1c, when performing plastic working for corrugation, it becomes easier to release the mold and the manufacturing becomes easier. Also, the corrugated steel plate 1 increases the width in the Y direction of the crest portion 1a and the trough portion 1b by reducing the inclination angle of the web 1c connecting the crest portion 1a and the trough portion 1b, and the rigidity when a bending moment is applied in the plane direction becomes higher. This is because the section modulus when the corrugated steel plate 1 is bent in the Z direction becomes larger as the widths of the crest portion 1a and the trough portion 1b become wider. The inclination angle of the web 1c of the corrugated steel plate 1 with respect to the horizontal direction is set to be 0° or more and 20° or less, and more desirably, 0° or more and 3° or less.

[0018] The corrugated steel plate 1 has a thickness of, for example, about 2.7 mm to 7 mm. The plate thickness of the crest portion 1a and the trough portion 1b is formed to be the same as the plate thickness of the web 1c, but it may be made thicker than the web 1c. By being configured in this way, the cross-sectional areas of the crest portion 1a and the trough portion 1b far from the neutral axis increase, and the section modulus of the corrugated steel plate 1 can be further increased.

[0019] <Horizontal flange portion 10> The corrugated steel plate 1 has horizontal flange portions 10 formed by bending both ends of the corrugation at both ends 11 in the width direction Y. The horizontal flange portions 10 are formed to extend from the peak portion 1a in the Z direction toward the trough portion 1b in the cross-sectional shape, and in the earth retaining structure 200, they face the opposite direction to the wall surface 303 of the excavation hole 301. The horizontal flange portions 10 are flat plate-like portions formed substantially perpendicular to the parallel direction of the peak portions 1a and trough portions 1b of the corrugation. A plurality of connecting holes 10a for connecting adjacent corrugated steel plates stacked in the hole axis direction of the excavation hole 301 are formed along the longitudinal direction X in the horizontal flange portions 10. The adjacent corrugated steel plates 1 in the vertical direction are connected by butting the horizontal flange portions 10 and fastening the shaft portion of the bolt inserted through the connecting hole 10a with a nut. Note that, as a means for connecting the horizontal flange portions 10 of the adjacent corrugated steel plates 1 in the vertical direction, a connecting tool such as a clip may be used. Also, the number of the illustrated connecting holes 10a is an example and is not limited thereto.

[0020] <Vertical flange portion 2> The vertical flange portion 2 is configured to be provided 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. A plurality of connecting holes 2a for connecting adjacent earth retaining panels 101 arranged in the circumferential direction of the excavation hole 301 are formed along the vertical direction (Y direction) in the vertical flange portion 2. The adjacent earth retaining panels 101 on the left and right are connected by butting the vertical flange portions 2 and fastening the shaft portion of the bolt inserted through the connecting hole 2a with a nut. As a means for connecting the vertical flange portions 2 of the adjacent earth retaining panels 101 on the left and right, a connecting tool such as a clip may be used instead of bolts and nuts. Also, the number of the illustrated connecting holes 2a is an example and is not limited thereto. Note that, at the rectangular corners of the structure 201, earth retaining panels 102 for corner portions processed into an L shape are arranged via corner members 41. The corrugated steel plate 1 and the vertical flange portion 2 constituting the earth retaining panel 102 have the same configuration as described above.

[0021] Note that the cross-sectional shape of the earth retaining panel 101 shown in FIG. 3 is an example, and it may be formed in a sine curve shape, for example, or may have other shapes.

[0022] <Reinforcing member 3> The reinforcing member 3 is, for example, a channel steel and is disposed sandwiched between a pair of vertical flange portions 2. The reinforcing member 3 extends in a direction intersecting the vertical flange portion 2, and both end faces in the longitudinal direction X are abutted against the inner surface 24 of the vertical flange portion 2 and are welded and joined to the vertical flange portion 2. A pair of reinforcing members 3 are provided at both end portions 12 in the width direction Y of the corrugated steel sheet 1. The pair of reinforcing members 3 are joined to the outside of the horizontal flange portions 10 formed at both end portions 12 in the width direction Y of the corrugated steel sheet 1. The reinforcing member 3 is configured to integrate the corrugated steel sheet 1 and the vertical flange portion 2.

[0023] Each of the pair of reinforcing members 3 includes a first portion 30 whose surface direction is arranged along the Z direction and a second portion 31 extending from the first portion 30 in the Y direction. The horizontal flange portion 10 of the corrugated steel sheet 1 abuts against the inner surface 34 of the first portion 30. The width dimension of the first portion 30 of the reinforcing member 3 may be the same as the width dimension of the vertical flange portion 2. A through hole 3c is formed in the first portion 30. For example, a bolt or the like for connecting to the earth retaining panel 101 adjacent in the Y direction is inserted through the through hole 3c. The second portion 31 is disposed closer to the wall surface 303 side than the corrugated steel sheet 1 along a plane at the top of the peak portion 1a of the corrugated steel sheet 1.

[0024] The reinforcing member 3 does not necessarily need to be joined to the corrugated steel sheet 1, but there is no particular problem even if it is joined to the corrugated steel sheet 1 by welding or the like. For example, when the length of the reinforcing member 3 in the longitudinal direction X is long, it may be intermittently welded to the corrugated steel sheet 1 for shape retention. Further, the reinforcing member 3 is not limited to channel steel, and for example, grooved steel or flat steel may be used. Also, one of the pair of reinforcing members 3 may be, for example, channel steel and the other may be grooved steel.

[0025] FIG. 4 is a side view schematically showing the earth retaining panel 101 according to Embodiment 1. As shown in FIG. 4, a part of the vertical flange portion 2 is cut, and the end face 22 of the vertical flange portion 2 in the Y direction is displaced from the outer surface 33 of the reinforcing member 3. The dimension H1 of the vertical flange portion 2 in the Y direction, that is, the distance between the end faces 22 of the vertical flange portion 2 in the Y direction, is smaller than the distance H2 between the outer surfaces 33 of a pair of opposing reinforcing members 3.

[0026] The end face 22 of the vertical flange portion 2 in the Y direction has a displacement of a dimension difference ΔH from the outer surface 33 of the reinforcing member 3. The dimension difference ΔH may be provided on either one of the end faces 22 of the vertical flange portion 2 in the Y direction, or may be provided on both of the vertical flange portion 2 in the Y direction. The plate thickness of the steel plate is, for example, 9 mm, 12 mm, 16 mm, or 19 mm, while the dimension difference ΔH is, for example, 6 mm. By setting the dimension difference ΔH to 6 mm, it is possible to secure the welding allowance while maintaining the contact between the vertical flange portion 2 and the reinforcing member 3.

[0027] The vertical flange portion 2 and the reinforcing member 3 are joined by, for example, fillet welding. Fillet welding is a welding method in which the welded portion 42 has a triangular cross section. As described above, the vertical flange portion 2 and the reinforcing member 3 are displaced and arranged in the Y direction of the corrugated steel plate 1, and the end face 22 of the vertical flange portion 2 in the Y direction is located between the outer surface 33 and the inner surface 34 of the reinforcing member 3. Therefore, the vertical flange portion 2 and the reinforcing member 3 are joined by a welded portion 42 having a triangular cross section that contacts the end face 22 of the vertical flange portion 2 and the end face 36 of the reinforcing member 3.

[0028] FIG. 5 is an explanatory diagram schematically showing an example of a construction method of the earth retaining structure 200 according to Embodiment 1. As shown in FIG. 5(A), in the construction method of the earth retaining structure 200, first, 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 about 0.5 m to 1.5 m as an example. Then, the earth retaining panels 101 are annularly arranged along the wall surface 303 of the excavation hole 301, and the structure 201 is assembled. The earth retaining panels 101 are arranged such that the mountain portions 1a face the natural ground side and the valley portions 1b face the excavation side. Note that the natural 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.

[0029] The structure 201 is assembled by sequentially arranging the earth retaining panels 101 along the circumferential direction of the wall surface 303 of the excavation hole 301 and connecting the adjacent earth retaining panels 101 on the left and right with bolts and nuts. The earth retaining panel 101 of the upper structure 201 and the earth retaining panel 101 of the lower structure 201 are connected with bolts and nuts. The upper earth retaining panel 101 and the lower earth retaining panel 101 are arranged with their circumferential positions shifted so as to be staggeredly arranged. Thereby, variations in strength and rigidity can be suppressed at each position in the circumferential direction of the earth retaining structure 200. However, if the vertical flange portion 2 of the earth retaining panel 101 has a sufficient thickness, the earth retaining panels 101 may be continuously installed in the hole axis direction without being staggeredly arranged. In this way, the structure 201 is stacked in a plurality of stages, for example, three stages, along the hole axis direction, and a part of the earth retaining structure 200 is constructed.

[0030] Next, as shown in FIG. 5(B), after the structure 201 located at the uppermost stage is fixed by the well girder 400 installed on the ground 300, the excavation hole 301 outside the structure 201 is backfilled with the excavated soil. The means for fixing the structure 201 located at the uppermost stage to the ground 300 is not limited to the well girder 400, and for example, concrete may be used.

[0031] Then, as shown in Fig. 5(C), while excavating the ground, the structure 201 is assembled and dug to a predetermined depth. After the structure 201 located at the uppermost stage is fixed by the well girder 400, the earth retaining panel 101 is arranged along the circumferential direction of the wall surface 303 of the excavation hole 301 at the lower end of the upper-stage structure 201. Then, it is connected to the upper-stage earth retaining panel 101 with bolts and nuts, and the adjacent earth retaining panels 101 on the left and right are connected with bolts and nuts, and the lower-stage structure 201 is constructed. Note that between the earth retaining panel 101 and the excavation hole 301, concrete or mortar is filled as a backfill injection material.

[0032] In this way, the earth retaining structure 200 is constructed by stacking a plurality of annular structures 201 as shown in Fig. 1 in multiple stages along the hole axis direction of the vertical excavation hole 301 formed by excavating the ground 300. Note that the earth retaining structure 200 is not limited to the rectangular shape shown in Fig. 1. For example, in a plan view, it may be circular, oval-shaped like a oval coin, or U-shaped like a horseshoe shape. Also, the corrugated steel sheet 1 may be configured in a shape corresponding to the shape of the earth retaining structure 200.

[0033] Fig. 6 is a partial front view of the earth retaining structure 200 according to Embodiment 1. As shown in Fig. 6, in the earth retaining structure 200 constructed by a plurality of earth retaining panels 101, a cavity G may be formed between the stacked earth retaining panels 101. The cavity G is formed because the vertical flange portion 2 and the reinforcing member 3 are joined by fillet welding, and the welded portion 42 between the vertical flange portion 2 and the reinforcing member 3 has a triangular cross-section. Although there is a possibility that the backfill injection material such as mortar may flow out from the cavity G between the earth retaining panels 101, the earth retaining panel 101 does not guarantee water stoppage and is not inferior to the case of being joined by conventional groove welding. Rather, when the backfill injection material flows into the cavity G, the fixing between the earth retaining panel 101 and the backfill injection material becomes stronger.

[0034] <Comparative Example> FIG. 7 is a partial side view of the earth retaining panel 101 according to the comparative example. As shown in FIG. 7, when the vertical flange portion 2 and the reinforcing member 3 are joined by facing each other, it is conceivable to use groove welding as a joining method. In groove welding, first, groove processing is performed. In the groove processing, the vertical flange portion 2 and the reinforcing member 3, which are the base materials to be joined, are cut at an appropriate angle to form a depression. The vertical flange portion 2 and the reinforcing member 3 are joined by welding in which the base material and the welding rod formed by the groove processing are completely melted. By joining the vertical flange portion 2 and the reinforcing member 3 by facing each other, a plurality of earth retaining panels 101 can be neatly stacked. On the other hand, in order to perform groove welding, it is necessary to perform groove processing on the vertical flange portion 2 and the reinforcing member 3 in advance and to perform a flat finishing operation after welding. This increases the number of work steps and leads to an increase in manufacturing cost and lead time.

[0035] Since the vertical flange portion 2 and the reinforcing member 3 are arranged offset from each other, the vertical flange portion 2 and the reinforcing member 3 can be joined by fillet welding, so there is no need to provide a groove, and the number of work steps can be reduced. As a result, the working time can be shortened, the manufacturing cost can be reduced, and an inexpensive earth retaining panel 101 can be provided.

[0036] According to the earth retaining panel 101 according to the first embodiment described above, the dimension H1 of the vertical flange portion 2 in the Y direction is smaller than the distance H2 between the outer surfaces 33 of the pair of opposing reinforcing members 3, and the vertical flange portion 2 has an end surface 22 that is offset from the outer surface 33 of the reinforcing member 3. Therefore, the vertical flange portion 2 and the reinforcing member 3 can be joined by fillet welding. When the vertical flange portion 2 and the reinforcing member 3 are arranged by facing each other, groove welding that requires groove processing is used. However, since the vertical flange portion 2 and the reinforcing member 3 are arranged offset from each other, it is possible to use fillet welding, and the labor in processing can be reduced.

[0037] Further, since the end surface 22 of the vertical flange portion 2 is located between the outer surface 33 of the reinforcing member 3 and the inner surface 34 of the reinforcing member 3, stable joining can be performed by fillet welding.

[0038] In addition, since the vertical flange portion 2 and the reinforcing member 3 are joined by fillet welding, the processes of beveling and flat finishing operations prior to welding are reduced, and the labor and product costs in manufacturing can be reduced.

[0039] Embodiment 2. FIG. 8 is a partial top view of the earth retaining panel 101 according to Embodiment 2. Embodiment 2 is different from Embodiment 1 in that it has a protruding portion 4. In Embodiment 2, the parts common to Embodiment 1 are denoted by the same reference numerals and the description thereof is omitted, and the description will be centered on the differences from Embodiment 1.

[0040] As shown in FIG. 8, the earth retaining panel 101 has a protruding portion 4 on at least one of both end portions 12 along the Y direction of the corrugated steel plate 1, in a direction opposite to the vertical flange portion 2, that is, on the natural ground side and protruding toward the wall surface 303 of the excavation hole 301. The protruding portion 4 extends from one of both end portions 12 along the Y direction of the corrugated steel plate 1 where the protruding portion 4 is provided, in a direction opposite to the vertical flange portion 2, that is, toward the natural ground side. The dimension of the protruding portion 4 is, for example, 6 mm. By the protruding portion 4, the vertical flange portion 2 is fixed to the natural ground, and the fixability of the earth retaining panel 101 to the natural ground is improved. Further, by providing the protruding portion 4, the protruding portion 4 serves as a catch for the backfill injection material injected between the earth retaining panel 101 and the natural ground, and the contact surface with the backfill injection material is increased by the thickness of the vertical flange portion 2 and the height in the Y direction of the vertical flange portion 2, that is, the height of both surfaces. Thereby, the fixability of the earth retaining panel 101 to the natural ground is improved.

[0041] The protruding portion 4, for example, continuously extends from the vertical flange portion 2 and is constituted by a part along the natural ground side of the vertical flange portion 2. The protruding portion 4 is formed, for example, by making the dimension F in the third direction of the vertical flange portion 2 having the protruding portion 4 the same as the dimension R in the third direction of the reinforcing member 3 and shifting the position of the vertical flange portion 2 toward the natural ground side. Thereby, the labor of separately attaching the protruding portion 4 is not generated, the strength of the protruding portion 4 can be maintained, and the fixability of the earth retaining panel 101 to the natural ground can be improved without increasing the manufacturing cost.

[0042] The protruding portion 4 only needs to serve as a catch for the backfill injection material, and is not limited to a configuration formed integrally with the vertical flange portion 2, and may be formed separately. Further, the width of the vertical flange portion 2 may be made larger than the width dimension of the first portion 30, and a part of the vertical flange portion 2 protruding in the Z direction from the edge of the first portion 30 of the reinforcing member 3 may be used as the protruding portion 4.

[0043] FIG. 9 is a partial top view of the earth retaining panel 101 according to Comparative Example 2. As shown in FIG. 9, in the earth retaining panel 101 according to Comparative Example 2, the ground side edge portion 23 of the vertical flange portion 2 is flush with the ground side edge portion 35 of the reinforcing member 3, and the protruding portion 4 is not provided. If the protruding portion 4 is not provided, it is conceivable that the backfill injection material injected between the earth retaining panel 101 and the ground will flow out to the outside of the vertical flange portion 2. If the backfill injection material flows out to the outside of the vertical flange portion 2, the earth retaining panel 101 cannot be sufficiently fixed to the ground.

[0044] As in the second embodiment, since the protruding portion 4 is provided on the earth retaining panel 101, the backfill injection material is suppressed from flowing out to the outside of the vertical flange portion 2, and the fixing property of the earth retaining panel 101 to the ground can be improved.

[0045] According to the earth retaining panel 101 according to the second embodiment described above, since the protruding portion 4 extending in the direction opposite to the vertical flange portion 2 is further provided from the vertical flange portion 2, the protruding portion 4 serves as a catch for the backfill injection material, and the fixing property of the earth retaining panel 101 to the ground is improved.

[0046] Further, since the protruding portion 4 is close to the wall surface 303 of the ground at the distal end from the vertical flange portion 2, it serves as a catch for the backfill injection material, the fixing of the vertical flange portion 2 to the ground is strengthened, and the fixing property of the earth retaining panel 101 to the ground is improved.

[0047] Further, since the protruding portion 4 extends continuously from the vertical flange portion 2, the fixing property to the ground can be improved without causing the trouble of separately attaching the protruding portion 4.

[0048] In addition, the total dimension F obtained by adding the dimension of the protruding portion 4 in the third direction and the dimension of the vertical flange portion 2 in the third direction is the same as the dimension R of the reinforcing member 3 in the third direction, and the protruding portion 4 can be provided by shifting the vertical flange portion 2 toward the ground side. Therefore, it is not necessary to separately provide the protruding portion 4, and the fixing property of the earth retaining panel 101 to the ground can be improved without taking much trouble.

[0049] As described above, the earth retaining panel 101 and the earth retaining structure 200 have been described based on the embodiments. However, the earth retaining panel 101 and the earth retaining structure 200 according to the present disclosure are not limited to the configurations of the above-described embodiments. For example, the configuration of the earth retaining panel 101 described above is an example and may include other components. That is, the earth retaining structure 200 can also be used by combining the earth retaining panels 101 according to the required strength. The earth retaining panel 101 may use a corrugated steel plate 1 having a cross-sectional shape of a sine curve shape such as a liner plate, in addition to the corrugated steel plate 1 having a rectangular wave shape. Also, the construction method of the earth retaining structure 200 is also an example and is not limited to the above-described embodiment. In short, the earth retaining panel 101 and the earth retaining structure 200 include the scope of design changes and application variations that those skilled in the art normally make without departing from the technical idea thereof.

[0050] The earth retaining panel 101 and the earth retaining structure 200 described above may also include combinations of the respective features shown in the following Supplementary Notes 1 to 7. The combinations are shown below.

[0051] [Supplementary Note 1] An earth retaining panel used for constructing an earth retaining structure installed along a wall surface formed by excavating the ground, a corrugated steel plate having a corrugated cross-sectional shape with ridges and valleys arranged in parallel in a first direction, and a vertical flange portion provided at an end portion of the corrugated steel plate in a second direction intersecting the first direction, A pair of reinforcing members are provided at both ends of the corrugated steel plate in the first direction so as to extend in a third direction intersecting the first direction and the second direction, and are joined to the inner surface of the vertical flange portion. comprising The distance between the end faces of the vertical flange portion in the first direction is smaller than the distance between the outer surfaces of the pair of reinforcing members. Earth retaining panel. [Appendix 2] In the first direction, The end face of the vertical flange portion is located between one of the outer surfaces of the pair of reinforcing members and one of the inner surfaces of the pair of reinforcing members. The earth retaining panel according to Appendix 1. [Appendix 3] The vertical flange portion and the pair of reinforcing members are joined by fillet welding. The earth retaining panel according to Appendix 1 or 2. [Appendix 4] provided at the end of the corrugated steel plate, further comprising a protruding portion extending from the vertical flange portion in the third direction, which is the direction opposite to the vertical flange portion. The earth retaining panel according to any one of Appendices 1 to 3. [Appendix 5] The protruding portion is in contact with the wall surface at the distal end from the vertical flange portion. The earth retaining panel according to Appendix 4. [Appendix 6] The protruding portion is continuously extending from the vertical flange portion. The earth retaining panel according to Appendix 4 or 5. [Appendix 7] The total dimension of the dimension of the protruding portion in the third direction and the dimension of the vertical flange portion in the third direction is the same as the dimension of the pair of reinforcing members in the third direction. The earth retaining panel according to any one of Appendices 4 to 6.

Explanation of reference numerals

[0052] 1 Corrugated steel plate, 1a Crest portion, 1b Trough portion, 1c Web, 2 Vertical flange portion, 2a Connection hole, 3 Reinforcement member, 3c Through hole, 4 Protrusion, 10 Horizontal flange portion, 10a Connection hole, 11 Both ends, 12 Both ends, 22 End face, 23 Edge portion, 24 Inner surface, 30 First portion, 31 Second portion, 33 Outer surface, 34 Inner surface, 35 Edge portion, 36 End face, 41 Corner member, 42 Weld portion, 101 Earth retaining panel, 102 Earth retaining panel, 200 Earth retaining structure, 201 Structure, 300 Ground surface, 301 Excavation hole, 303 Wall surface, 400 Well girder.

Claims

1. An earth retaining panel used for constructing an earth retaining structure installed along a wall surface formed by excavating a mountain, comprising: A corrugated steel sheet having a corrugated cross-sectional shape with ridges and valleys arranged in a first direction; A vertical flange portion provided at an end portion of the corrugated steel sheet in a second direction intersecting the first direction; A pair of reinforcing members provided at both end portions of the corrugated steel sheet in the first direction so as to extend in a third direction intersecting the first direction and the second direction, and joined to the inner surface of the vertical flange portion; And comprising; The distance between the end faces of the vertical flange portion in the first direction is smaller than the distance between the outer surfaces of the pair of reinforcing members. An earth retaining panel.

2. In the first direction, The end face of the vertical flange portion is Located between the outer surface of one of the pair of reinforcing members and the inner surface of one of the pair of reinforcing members. The earth retaining panel according to Claim 1.

3. The vertical flange portion and the pair of reinforcing members are Joined by fillet welding. The earth retaining panel according to Claim 1 or 2.

4. Provided at the end portion of the corrugated steel sheet, Further comprising a protruding portion extending from the vertical flange portion in the third direction, which is the direction opposite to the vertical flange portion. The earth retaining panel according to Claim 1.

5. The protruding portion is in contact with the wall surface at the distal end from the vertical flange portion. The earth retaining panel according to Claim 4.

6. The protruding portion Continuously extends from the vertical flange portion. The earth retaining panel according to Claim 4 or 5.

7. The total dimension of the dimension of the protruding portion in the third direction and the dimension of the vertical flange portion in the third direction is The same as the dimension of the pair of reinforcing members in the third direction. The earth retaining panel according to Claim 4 or 5.

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