Corner members and earth retaining structures

Abstract

To provide corner members providing sufficient strength and an earth retaining structure having the corner members, in the earth retaining structure having the corner members.SOLUTION: A corner member 30 for connecting two earth retaining panels 10 in a crossed state of first directions of the two earth retaining panels 10, out of multiple earth retaining panels 10, includes: a corner connection member connected so that two flat plate parts form an L-shape in a first cross section perpendicular to a second direction, when a direction perpendicular to the first direction is assumed as the second direction; a corner reinforcing member connecting tip end parts of the two flat plate parts with each other; two panel bodies arranged along the first direction; two flat plate-like vertical flange parts to which the two earth retaining panels 10 are connected; and a reinforcement member 25 jointed to the flat plate parts and the vertical flange parts. The reinforcement member is connected to one of the two flat plate parts of the corner connection member and to one of the two vertical flange parts, from one of the second direction and the third direction, when a third direction perpendicular to both of the first direction and the second direction is stipulated.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present invention relates to a structure of a corner member of a soil retaining structure constructed on the ground, which is formed by connecting a plurality of soil retaining panels with corner members.

Background Art

[0002] Conventionally, civil engineering structures such as shafts for constructing the foundation of a structure, sump wells constructed underground, and retaining walls on slopes are constituted by a soil retaining structure formed by connecting soil retaining panels to form a wall in an annular or horseshoe shape (U-shaped, C-shaped).

[0003] Such a soil retaining structure has the advantage that each soil retaining panel is lightweight and easy to construct manually even at a site where large construction machines cannot be used, such as in mountainous areas. For example, when constructing a shaft, workers can enter the shaft and connect the soil retaining panels. The soil retaining structure is formed by combining a plurality of soil retaining panels to form an annular body, and a plurality of such annular bodies are connected in the central axis direction of the annular body. And the strength of the whole soil retaining structure is ensured by arranging a plurality of soil retaining panels in a staggered manner.

[0004] The soil retaining structure disclosed in Patent Document 1 connects a plurality of linear liner plates that are linear in plan view using a plurality of L-shaped corner liner plates.

Prior Art Documents

Patent Documents

[0005]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0006] In Patent Document 1, a corner liner plate (corner member) is equipped with angle steel (corner connecting member) positioned at the corner, connecting multiple straight liner plates. The liner plate receives a load from the surrounding ground, causing deformation in which the ends of the angle steel separate. Also, if a load is applied to the liner plate from the inside, deformation occurs in which the ends of the angle steel separate. Because the load applied to the liner plate concentrates on the angle steel used in the corner member, causing deformation of the angle steel, the shape of the earth retaining structure cannot be maintained. Therefore, the corner member is provided with a plate-shaped corner reinforcing member to prevent deformation of the ends of the angle steel, and the corner reinforcing member and the angle steel are welded together, or the corner reinforcing member and the angle steel are partially welded together, thereby reducing the amount of distortion caused by welding and suppressing the increase in processing time for the corner member. However, if the strength of the angle steel portion is increased, the strength of the liner plate (panel body) joined to the angle steel becomes relatively low, resulting in deformation, which is a problem.

[0007] Furthermore, to strengthen the straight section liner plate, it is conceivable to join reinforcing members, for example, with an L-shaped cross-section, to the vertical flanges at both ends of the straight section liner plate. In this case, although the angle steel (corner connecting member) of the corner liner plate has sufficient strength as described above, the strength of the liner plate (panel body) joined to the angle steel is relatively low, which presents a problem as the corner member deforms.

[0008] The present invention solves the above-mentioned problems and provides a corner member that can ensure sufficient strength in an earth retaining structure having a corner member, and an earth retaining structure equipped with said corner member. [Means for solving the problem]

[0009] The corner member according to the present invention is used in an earth retaining structure constructed by arranging a plurality of earth retaining panels along a wall surface formed by excavating the ground, and is a corner member that connects two earth retaining panels with their respective first directions along the wall surface intersecting, comprising: a corner connecting member in which two flat plate portions are connected in an L-shape in a first cross section perpendicular to the second direction when the direction perpendicular to the first direction of each of the two connected earth retaining panels is taken as the second direction; a corner reinforcing member that connects the tips of the two flat plate portions in the first cross section; two panel bodies with their plate surfaces facing the wall surface and arranged along the respective first directions of the two earth retaining panels; two plate-shaped vertical flange portions to which the two earth retaining panels are connected; and a reinforcing member joined to one of the two flat plate portions of the corner connecting member and to one of the two vertical flange portions. The corner reinforcing member is a plate-shaped member whose longitudinal direction extends in a second direction, and in the longitudinal direction, the corner reinforcing member extends from near one end to near the other end of the corner connecting member. Each of the two panel bodies has one end face perpendicular to the first direction joined to the respective plate surfaces of the two flat plate portions of the corner connecting member, and the other end face perpendicular to the first direction joined to the plate surface of one of the two vertical flange portions. The reinforcing member is joined to one of the two flat plate portions of the corner connecting member and one of the two vertical flange portions from at least one of the second and third directions, when a third direction perpendicular to both the first and second directions is defined.

[0010] Furthermore, the earth retaining structure according to the present invention includes the above-mentioned corner members.

[0011] Furthermore, the earth retaining structure according to the present invention is an earth retaining structure constructed by arranging a plurality of earth retaining panels along a wall surface formed by excavating the ground, wherein the structure includes a corner member that connects two of the plurality of earth retaining panels when the first directions along the wall surface of each of the plurality of earth retaining panels intersect, the plurality of earth retaining panels each includes a panel body with its plate surface facing the wall surface and arranged along the first direction of each of the two earth retaining panels, and vertical flange portions joined to both ends of the panel body in the first direction, the corner member includes a corner connecting member formed such that two flat plate portions form an L shape in a first cross section perpendicular to the second direction when the direction perpendicular to the first direction of each of the two connected earth retaining panels is taken as the second direction, and a corner reinforcing member that connects the tips of the two flat plate portions in the first cross section. The corner reinforcing member is a plate-shaped member whose longitudinal direction extends in a second direction, and in the longitudinal direction, the corner reinforcing member extends from near one end to near the other end of the corner connecting member. The two earth-retaining panels are connected to each of the two flat plate portions of the corner connecting member and are joined to the portion of the outer periphery of the vertical flange portion facing the second direction and the portion facing the third direction. [Effects of the Invention]

[0012] According to the present invention, since the corner members are reinforced by reinforcing members, deformation can be suppressed even when a load from the ground is concentrated, thus maintaining the shape of the earth retaining structure. [Brief explanation of the drawing]

[0013] [Figure 1] This is a perspective view of the earth retaining structure 100 according to Embodiment 1. [Figure 2] This is a perspective view of the retaining wall panel 1010 according to Embodiment 1. [Figure 3] This is a cross-sectional view of the panel body 14 of the earth retaining panel 1010 according to Embodiment 1. [Figure 4] This is a perspective view of the earth retaining panel 10 according to Embodiment 1. [Figure 5] This is a cross-sectional view of the earth retaining panel 10 according to Embodiment 1. [Figure 6] This is a perspective view of the corner member 1030 of the earth retaining structure 100 according to Embodiment 1. [Figure 7] It is a perspective view of the corner member 1030 of the earth retaining structure 100 according to Embodiment 1. [Figure 8] It is a perspective view of the corner member 30 of the earth retaining structure 100 according to Embodiment 1. [Figure 9] It is a cross-sectional view of the corner member 30 according to Embodiment 1. [Figure 10] It is an arrangement view of the welding part 36 of the corner reinforcing member 32 of the corner member 30 according to Embodiment 1. [Figure 11] It is an explanatory view of a modification of the arrangement of the corner reinforcing member 32 and the welding part 36 of the corner reinforcing member 32 of the corner member 30 according to Embodiment 1. [Figure 12] It is an explanatory view of a modification of the arrangement of the corner reinforcing member 32 and the welding part 36 of the corner reinforcing member 32 of the corner member 30 according to Embodiment 1. [Figure 13] It is an example of the cross-sectional shape of the panel body 14 used for the earth retaining panels 10, 1010, etc. according to Embodiment 1. [Figure 14] It is an explanatory view of a modification of the arrangement of the corner reinforcing member 32 of the corner member 30 according to Embodiment 1. [Figure 15] It is a cross-sectional view of the corner member 230 of the earth retaining structure 100 according to Embodiment 2. [Figure 16] It is a perspective view of the corner member 330 according to Embodiment 3. [Figure 17] It is a front view of the corner member 330 according to Embodiment 3.

Embodiments for Carrying out the Invention

[0014] The earth-retaining structure and corner members according to the embodiment will be described below with reference to the drawings. Note that in the following drawings, including Figure 1, the relative dimensions and shapes of each component may differ from those of the actual components. Also, in the following drawings, components with the same reference numerals are the same or equivalent, and this is consistent throughout the entire specification. In addition, terms indicating direction (e.g., up, down, left, right, front, back, front and back) will be 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 devices, equipment, or parts.

[0015] Embodiment 1. [Earth retaining structure 100] Figure 1 is a perspective view of the earth retaining structure 100 according to Embodiment 1. The earth retaining structure 100 is constructed, for example, when constructing civil engineering structures such as a shaft for constructing the foundation of a structure or a water collection well constructed underground, and is constructed inside a vertical hole formed by excavating the ground 92. The earth retaining structure 100 shown in Figure 1 is, as an example, a structure for forming a relatively small foundation in the ground 92, and in plan view, is composed of a single-stage earth retaining unit 50 formed by connecting a plurality of earth retaining panels 10 in a rectangular shape with corner members 30. In the following description, the outside of the earth retaining structure 100 will be called the ground 92, and the inside will be called the space 93. In Embodiment 1, the earth retaining structure 100 is rectangular in view perpendicular to the ground 92, i.e., in the z direction, but is not limited to a rectangle. The earth retaining structure 100 may be formed in a circular, oval, elliptical, rectangular, or oval ring shape in plan view, for example. Furthermore, the retaining structure 100 can also be formed as a semi-ring shape such as a horseshoe or a U-shape in plan view. When the retaining unit 50 is a semi-ring shape, the central axis c of the retaining unit 50 can be considered as the axis that passes through the center of gravity of the retaining unit 50 in plan view and extends perpendicularly to the ground 92 on which the retaining unit 50 is installed. Note that the x and y directions shown in the figure are directions along the surface of the ground 92 on which the retaining structure 100 is installed, the z direction is the depth direction of the shaft, and the opposite direction of the z direction is the height direction of the retaining structure.

[0016] In Embodiment 1, the earth retaining structure 100 is formed by a single layer of earth retaining units 50, but it may also be formed by stacking and connecting earth retaining units 50 in the height direction. Alternatively, the earth retaining structure 100 may be formed by constructing a single layer of earth retaining units 50, fixing it to the ground 92, and then connecting new earth retaining units 50 in the depth direction of the shaft. Since the load received from the ground 92 changes depending on the depth of the shaft, the earth retaining structure 100 ensures overall strength by connecting earth retaining units 50 with different strengths according to the depth. In other words, the earth retaining structure 100 ensures the necessary strength by appropriately combining the earth retaining panels and corner members described below.

[0017] The earth retaining unit 50 shown in Figure 1 is installed along the excavation wall surface 95 (see Figures 3 and 5) of a shaft formed by excavating the ground 92 in a roughly rectangular shape, for example, when installing a relatively small foundation such as the foundation supporting a station platform. In this case, for a small foundation, the depth of the shaft is relatively shallow, and only one layer of earth retaining panels 10 can be placed in the z direction. Therefore, the earth retaining unit 50 is formed by connecting multiple earth retaining panels 10 in the circumferential direction using connecting members 40 such as bolts and nuts. Also, in the earth retaining structure 100 in Figure 1, since each side of the rectangle is short, two earth retaining panels 10 are placed on each side, and these multiple earth retaining panels 10 are connected by corner members 30. Note that the earth retaining unit 50 is not limited to having two earth retaining panels 10 on each side, but may have one or more earth retaining panels 10 on each side, or may consist only of corner members 30.

[0018] The corner member 30 is configured such that retaining walls 10 are connected to both ends, connecting two retaining walls 10 in intersecting directions. Here, in the retaining wall unit 50, which is an annular body, the direction in which multiple retaining walls 10 are connected (the circumferential direction of the annular body) is referred to as the first direction. The first direction is the circumferential direction around the central axis of the retaining wall unit 50, and in the case of the retaining wall unit 50 in Figure 1, it is the direction along each side of the rectangle, i.e., the x(y) direction and the y(x) direction. The direction perpendicular to the first direction (i.e., the x(y) direction and the y(x) direction) of each of the two retaining walls 10 connected by the corner member 30 is referred to as the second direction. The second direction is the z direction in Figure 1. The plane direction of the panel body 14 that constitutes each retaining wall 10 is referred to as the third direction. When focusing on a single panel body 14, the third direction is the direction perpendicular to both the first and second directions.

[0019] The retaining wall unit 50 has an axial connecting portion 11 to which the retaining wall panel 10 and the corner member 30 are connected. The retaining wall panel 10 and the corner member 30 that constitute the retaining wall unit 50 each have a reinforcing member 25. The reinforcing member 25 is joined to the vertical flange portion 19 (see Figures 2 and 4, etc.) that constitute the axial connecting portion 11, and the vertical flange portions 19 are connected to each other by a connecting member 40, thereby reinforcing the retaining wall unit 50. With this configuration, when the retaining wall panel 10 or the corner member 30 is subjected to a load from the ground 92, the reinforcing member 25 connected by the vertical flange portion 19 can bear the load.

[0020] [Earth retaining panel 10] Figure 2 is a perspective view of the retaining wall panel 1010 according to Embodiment 1. Figure 3 is a cross-sectional view of the panel body 14 of the retaining wall panel 1010 according to Embodiment 1. Figures 2 and 3 show the retaining wall panel 10 shown in Figure 1 with the reinforcing member 25 removed. In other words, the retaining wall panel 10 is the retaining wall panel 1010 shown in Figures 2 and 3 with the reinforcing member 25 added. Figure 3 shows a cross-section perpendicular to the first direction, which is the circumferential direction of the retaining wall unit 50, and shows an example of a cross-section (xz cross-section or yz cross-section) along the central axis of the retaining wall unit 50 of the retaining wall structure 100 shown in Figure 1. The panel body 14 of the retaining wall panel 10 shown in Figure 3 has a rectangular wave shape with rounded corners in cross-section, and surfaces parallel to each other are formed on the outside and inside of the retaining wall structure 100. The retaining wall panel 1010 includes a panel body 14 having the cross-sectional shape shown in Figure 3 as an example, but the cross-sectional shape of the panel body 14 can be changed. For example, the panel body 14 is not limited to corrugated steel plates, but may also be a flat plate or the like. Furthermore, if the earth retaining structure 100 is composed of multiple earth retaining units 50 stacked in the axial direction, it may include some unreinforced earth retaining panels 1010.

[0021] The earth retaining panel 1010 has transverse flange portions 13 formed at both ends in the z direction, and is structured to be connectable in the z direction. The transverse flange portions 13 have connecting holes 13a formed therein, to which connecting members 40 are applied. Multiple connecting holes 13a are formed in the transverse flange portions 13 and are arranged at equal intervals in the first direction. In addition, a corrugated portion is formed between two transverse flange portions 13. Note that the connecting hole 13a that penetrates in the z direction and is provided in the transverse flange portion 13 may be called the second connecting hole 13a.

[0022] The trapezoidal corrugated panel body 14 of the retaining wall panel 1010 shown in Figure 3 comprises, in the cross-section of Figure 3, a protrusion 16 that protrudes inward from the retaining wall unit 50, and outer wall portions 17 and 18 that protrude outward from the retaining wall unit 50. The outer wall portion 18 connecting the protrusion 16 and the lateral flange portion 13 is referred to as the first outer wall portion 18, and the outer wall portion 17 connecting two adjacent protrusions 16 is referred to as the second outer wall portion 17. In the cross-sectional shape of the panel body 14 of the retaining wall panel 1010 according to Embodiment 1, there are multiple protrusions 16, but there may be only one. For example, in Figure 3, there are two protrusions 16, but there may be only one located in the center in the z direction.

[0023] The protruding portion 16 has an inner wall portion 16a that has a surface perpendicular to the surface of the lateral flange portion 13 in cross-section. The inner wall portion 16a and the outer wall portions 17 and 18 are formed substantially parallel to each other. The inner wall portion 16a and the outer wall portions 17 and 18 are connected by a web portion 15. The web portion 15 has a surface that extends in the y(x) direction in the cross-section of Figure 3 and is slightly inclined with respect to the y(x) direction. The inclination direction of the web portion 15 is such that when the panel body 14 is viewed from the central axis c of the earth retaining unit 50, the open end of the corrugated valley portion is wide and the valley bottom is narrow. With this configuration, the panel body 14 is easier to demold and manufacture when plastic deformation is performed for corrugation.

[0024] Furthermore, by forming the web portion 15 at an angle nearly parallel to the y(x) axis in Figure 3, the widths of the inner wall portion 16a and the outer wall portions 17 and 18 are increased. As a result, the rigidity of the retaining wall panel 1010 is increased when a bending moment is applied in the thickness direction. When the retaining wall panel 1010 of the retaining wall structure 100 in Figure 1 is subjected to a load in the plane direction of the panel body 14, i.e., in the y(x) direction, a bending moment is applied to the retaining wall panel 1010 in the y(x) direction. At this time, the section modulus of the retaining wall panel 1010 with respect to the neutral axis N of bending is larger when the widths of the inner wall portion 16a and the outer wall portions 17 and 18, which are farther from the neutral axis N, are wider. Therefore, by forming the web portion 15 at an angle nearly parallel to the y(x) axis, the width dimensions in the z direction of the inner wall portion 16a and the outer wall portions 17 and 18 are increased, and the strength and rigidity of the retaining wall panel 1010 against bending loads in the y(x) direction are increased. Specifically, the web portion 15 is set to an angle of 0° to 20° with respect to the direction perpendicular to the inner wall portion 16a or the outer wall portions 17 and 18, and more preferably to an angle of 0° to 3°.

[0025] The panel body 14 shown in Figure 3 has a thickness of approximately 2.7 mm to 7 mm. The inner wall portion 16a and the outer wall portions 17 and 18 are formed with the same plate thickness as the web portion 15, but the plate thickness may be greater than that of the web portion 15. With this configuration, the cross-sectional area of ​​the inner wall portion 16a and the outer wall portions 17 and 18, which are farther from the neutral axis N, becomes larger, and the section modulus of the earth retaining panel 1010 can be further increased.

[0026] As shown in Figures 2 and 3, the earth retaining panel 1010 has transverse flange portions 13 formed at both ends in the z direction. The transverse flange portions 13 are formed perpendicular to the z direction, and connecting holes 13a are provided in the flat portions. The transverse flange portions 13 are parallel to the x and y directions and have a surface large enough to which the connecting member 40 can be attached.

[0027] The retaining wall panel 1010 is provided with vertical flange portions 19 at both ends in the first direction, which is the circumferential direction of the retaining wall unit 50. The vertical flange portions 19 are plate-shaped members and are joined to the end faces of the panel body 14 in the first direction by welding. The length of the vertical flange portion 19 in the z direction is substantially the same as the length of the panel body 14 in the width direction, i.e., the z direction. The vertical flange portion 19 is provided with connecting holes 19a that penetrate the plate surface. Note that the connecting holes 19a provided in the vertical flange portion 19 that penetrate in the first direction are sometimes called first connecting holes 19a. As shown in Figure 1, the connecting holes 19a are holes through which connecting members 40 such as bolts and nuts are passed when connecting the retaining wall panel 1010 to other retaining wall panels 1010 or corner members 30 in the circumferential direction of the retaining wall unit 50.

[0028] The connecting holes 19a are positioned to correspond to the corrugated shape of the panel body 14, specifically, they are arranged in the y(x) direction of the outer wall portions 17 and 18 of the panel body 14. Furthermore, the connecting holes 19a are positioned inside the earth retaining unit 50, relative to the outer wall portions 17 and 18. This configuration allows workers to connect the earth retaining panels 1010 from inside the shaft where the earth retaining structure 100 is installed.

[0029] The structure of the vertical flange portion 19 is basically the same even if the cross-sectional shape of the panel body 14 is another shape, such as a sine curve. In other words, if the retaining wall panel 1010 has a sine curve cross-sectional shape, the connecting holes 19a are positioned at locations corresponding to the valleys of the outer wall portions 17b and 18 (see Figure 13) when the retaining wall panel 1010 is viewed from the inside of the retaining wall unit 50. In the case of the retaining wall panel 10 having the cross-sectional shape shown in Figure 3, three connecting holes 19a are positioned on the vertical flange portion 19, corresponding to the locations of the outer wall portions 17 and 18, which are valleys when viewed from the inside of the retaining wall structure 100.

[0030] Figure 4 is a perspective view of the retaining wall panel 10 according to Embodiment 1. Figure 5 is a cross-sectional view of the retaining wall panel 10 according to Embodiment 1. The retaining wall panel 10 is the retaining wall panel 10 described above with reinforcing members 25 added to both ends in the z direction. The reinforcing member 25 is an L-shaped member in a cross section parallel to the yz plane, with a horizontal member 25b arranged along the surface of the horizontal flange portion 13 of the panel body 14, and a vertical member 25c arranged on the outside of the panel body 14. The reinforcing member 25 has a structure in which the horizontal member 25b and the vertical member 25c are combined in an L shape, and may be formed by a build method in which two plate materials are welded together, or the cross-sectional shape may be formed into an L shape by roll forming.

[0031] The reinforcing member 25 is joined to the outer peripheral edge of the vertical flange portion 19 from the outside. The horizontal member 25b is in contact with the outer peripheral edges of the vertical flange portion 19 in the z direction and the opposite direction of the z direction from the outside and is fixed by joining means such as welding. The vertical member 25c is in contact with the outer peripheral edge of the vertical flange portion 19 facing the y(x) direction from the outside and is joined. The dotted line p in Figure 5 shows the outer peripheral edge of the vertical flange portion 19 when the reinforcing member 25 is joined to the vertical flange portion 19 from the outside.

[0032] Furthermore, the reinforcing member 25 may be joined to the vertical flange portion 19 in a state where it abuts against the plate surface perpendicularly. In this case, the vertical flange portion 19 is set to the outer shape shown by the dashed line q in Figure 5. Note that the reinforcing member 25 may also be welded to the horizontal flange portion 13 of the panel body 14, in addition to the vertical flange portion 19.

[0033] [Corner member 1030] Figures 6 and 7 are perspective views of the corner member 1030 of the earth retaining structure 100 according to Embodiment 1. The corner member 1030 comprises an L-shaped corner connecting member 31 when viewed from the z direction, a panel body 14 having the same structure as the panel body 14 of the earth retaining panel 10, and a vertical flange portion 19 joined to the end face of the panel body 14 in the first direction (circumferential direction). The corner member 1030 is connected to the vertical flange portion 19 of the earth retaining panel 1010, forming the corner of the earth retaining structure 100. In Embodiment 1, the corner member 1030 connects two earth retaining panels 1010 orthogonally, but they may be connected at angles other than right angles. Figures 6 and 7 show the same structure as the corner member 1030 shown in Figure 1 with the reinforcing member 25 removed. In other words, the corner member 30 in Figure 1 is the corner member 1030 shown in Figures 6 and 7 with the reinforcing member 25 added. Furthermore, if the earth retaining structure 100 is composed of multiple earth retaining units 50 stacked in the axial direction, it may include some unreinforced corner members 1030. Also, an earth retaining unit 50 that includes corner members 1030 may be composed of earth retaining panels 1010 connected between the corner members 1030.

[0034] The panel body 14 of the corner member 1030 has the same shape as the panel body 14 of the earth retaining panels 10 and 1010, except for the length in the first direction, and may be formed in a corrugated shape such as a sine curve. The length of the panel body 14 can be changed as appropriate.

[0035] The corner connecting member 31 is formed in an L-shape when viewed from the z-direction, and has a shape in which the flat plate portions 33 are connected perpendicularly. The flat plate portions 33 are plate-like and their longitudinal direction extends in the z-direction. One end face of the panel body 14 is joined to the flat plate portions 33 by welding or the like. The tip portions 35 of the two flat plate portions 33 of the corner connecting member 31 are joined to the corner reinforcing member 32. The corner reinforcing member 32 is a plate-like member and, as shown in Figure 6, its longitudinal direction extends in the z-direction. The corner reinforcing member 32 is positioned to connect the tip portions 35 of the corner connecting member 31, thereby suppressing deformation in the direction in which the tip portions 35 of the flat plate portions 33 open apart.

[0036] Figure 8 is a perspective view of the corner member 30 of the earth retaining structure 100 according to Embodiment 1. Figure 9 is a cross-sectional view of the corner member 30 according to Embodiment 1. The corner member 30 is obtained by adding reinforcing members 25 to both ends in the z direction of the corner member 1030 described above. The reinforcing members 25 are L-shaped members in a cross section parallel to the yz plane, similar to those provided in the earth retaining panel 10, with a horizontal member 25b arranged along the surface of the horizontal flange portion 13 of the panel body 14, and a vertical member 25c arranged on the outside of the panel body 14.

[0037] The reinforcing member 25 is joined to the outer peripheral edge of the vertical flange portion 19 and the flat plate portion 33 of the corner connecting member 31. The horizontal member 25b is in contact with the outer peripheral edge of the flat plate portion 33 of the corner connecting member 31 in the z direction and the opposite direction of z from the outside and is fixed by joining means such as welding. The vertical member 25c is in contact with the outer peripheral edge of the flat plate portion 33 of the corner connecting member 31 facing the y(x) direction from the outside and is joined. The reinforcing member 25 and the vertical flange portion 19 are joined in the same way as the earth retaining panel 10 described above. The reinforcing member 25 may also be welded to the horizontal flange portion 13 of the panel body 14 in addition to the vertical flange portion 19.

[0038] In Figures 8 and 9, the reinforcing member 25 is joined from the outside to the outer edge of the vertical flange portion 19 and the flat plate portion 33 of the corner connecting member 31, but it may also be joined from the direction of the plate surface. In this case, the outer shape of the flat plate portion 33 of the corner connecting member 31 is set to be the same size as the outer shape of the vertical flange portion 19 (dash-dot line q) shown in Figure 5.

[0039] [Regarding the positional relationship between the shape of the panel body 14 and the welded joint 36] Figure 10 is an arrangement diagram of the welded portion 36 of the corner reinforcing member 32 of the corner member 30 according to Embodiment 1. The corner reinforcing member 32 is welded to the tip portions 35 of the two flat plate portions 33. The welded portion 36 includes a plurality of welded portions 36a, 36b, and 36c. By dividing and arranging the welded portion 36 of the corner reinforcing member 32 into multiple parts, manufacturing costs due to welding can be reduced and deformation due to welding can be suppressed. In addition, the flat plate portion 33 of the corner connecting member 31 is deformed so that the two flat plate portions 33 open up when the load received by the panel body 14 joined to the flat plate portion 33 is transmitted. Also, since the reinforcing member 25 is joined to the corner connecting member 31 of the corner member 30, the load received by the reinforcing member 25 is transmitted and the two flat plate portions 33 open up when the corner member 30 is deformed.

[0040] The welded portion 36 of the corner reinforcing member 32 should be provided at a location where the tips 35 of the two flat plate portions 33 are pulled and deformed to open. When the panel body 14 receives a load from the ground 92, the outer wall portions 17 and 18 of the panel body 14 are joined to the tips 35 of the flat plate portions 33 of the corner connecting member 31, thus pulling the tips 35 of the corner connecting member 31 and deforming them to open. For this reason, the welded portion 36 should be positioned in the z-direction to correspond to the outer wall portions 17 and 18 of the panel body 14, as shown in Figure 10. Specifically, the welded portions 36a and 36c are arranged so that at least a portion of them is parallel to the outer wall portion 18 in the circumferential direction of the earth retaining unit 50, i.e., the first direction. The welded portion 36b is also arranged so that at least a portion of it is parallel to the outer wall portion 17 in the circumferential direction of the annular earth retaining unit 50, i.e., the first direction.

[0041] In other words, the welded portion 36a is positioned so as to at least partially overlap region a1 shown in Figure 3 in the z direction. Preferably, the welded portion 36a is positioned so as to overlap region aa1 in Figure 3. The welded portion 36b is positioned so as to at least partially overlap region a2 shown in Figure 3 in the z direction. Preferably, the welded portion 36b is positioned so as to overlap region aa2 in Figure 3. The welded portion 36c is positioned so as to at least partially overlap region a3 shown in Figure 3 in the z direction. Preferably, the welded portion 36c is positioned so as to overlap region aa3 in Figure 3.

[0042] The welded portion 36a can be positioned to encompass the entire region a1 shown in Figure 3, but even if it is positioned to partially overlap region a1, the load from the outer wall portion 18 can be transmitted to the corner reinforcing member 32 via the welded portion 36a. The welded portion 36b and region a2, and the welded portion 36c and region a3 are positioned in the same way as the relationship between the welded portion 36a and region a1. The welded portion 36 may overlap region B, but the corner reinforcing member 32 in the portion corresponding to region B does not need to be welded. Regions a1 to a4 and aa1 to aa4 are sometimes collectively referred to as region A. In the z-direction, at least a portion of the welded portion 36 is positioned in region A in the z-direction, i.e., in the height direction (z-direction) of the corner connecting member 31. Region A is the area in which the portion of the corrugation of the panel body 14 that protrudes from the neutral line of the corrugation of the earth retaining panel toward the side where the free end of the flat plate portion of the corner connecting member is located is located in the height direction which is perpendicular to the first direction of each of the two earth retaining panels.

[0043] [Regarding the positional relationship between the reinforcing member 25 and the welded joint 36] The corner member 30 has a reinforcing member 25, which is installed to reinforce the panel body 14. The vertical member 25c of the reinforcing member 25 is joined to both ends in the z direction of the tip 35 of the flat plate portion 33 of the corner connecting member 31. Therefore, when the reinforcing member 25 is subjected to a load from the ground 92, it pulls on the tip 35 of the corner connecting member 31, deforming it to open the two tip 35 apart. Thus, it is preferable that the welded portion 36 be positioned so that its position in the z direction corresponds to the joining location of the vertical member 25c of the reinforcing member 25 (region C shown in Figure 5). Specifically, it is desirable that the welded portions 36a and 36c be installed at both ends in the z direction of the corner reinforcing member 32.

[0044] Since the reinforcing member 25 is formed in an L-shape and the transverse members 25b are joined to the outer peripheral edges on both sides in the z-direction of the corner connecting member 31, it is desirable that the welded portion 36 be positioned in a region that includes both ends of the corner reinforcing member 32 in the z-direction. Alternatively, it is preferable that the welded portion 36 be positioned so as to partially overlap with region C (see Figure 5) where the longitudinal members 25c of the reinforcing member 25 are joined in the z-direction.

[0045] By positioning the welded joint 36 in a location corresponding to the reinforcing member 25, the two reinforcing members 25 connected via the corner connecting member 31 are connected more directly via the corner reinforcing member 32, thereby improving the overall strength of the corner member 30. Furthermore, by limiting the welded joint 36 of the corner reinforcing member 32 to only the area around where the reinforcing member 25 is located, it is possible to reduce welding work while ensuring strength. Note that the welded joint 36b located in the center in the z direction as shown in Figure 10 may be positioned in accordance with the outer wall portion 17 in the center in the z direction of the panel body 14, but it can be omitted if necessary.

[0046] Furthermore, by positioning the welded portion 36 to match the shape of the panel body 14 and to align with the joining position (region C) of the reinforcing member 25, the strength of the corner member 30 can be further improved.

[0047] Figure 11 is an explanatory diagram of a modified example of the arrangement of the corner reinforcing member 32 and the welded portion 36 of the corner reinforcing member 32 of the corner member 30 according to Embodiment 1. In the modified example, the corner member 30A is such that both ends of the corner reinforcing member 32 in the z direction are shorter than the z-direction length of the corner connecting member 31. Although both ends of the corner reinforcing member 32A are shorter than the corner connecting member 31, it is desirable that the area occupied by the welded portion 36 in the z direction corresponds to the area in which the welded portions 36a to 36c are joined to the flat plate portion 33 of the reinforcing member 25. In particular, it is desirable that the welded portions 36a and 36c are set to include both ends 37 in the z direction of the corner reinforcing member 32. According to the corner member 30A of Figure 11, the corner reinforcing member 32A can be made smaller, thus reducing weight and the amount of material used.

[0048] Figure 12 is an explanatory diagram of a modified example of the arrangement of the corner reinforcing member 32 and the welded portion 36 of the corner reinforcing member 32 of the corner member 30 according to Embodiment 1. In the corner member 30B shown in Figure 12, the corner reinforcing member 32 is divided into a plurality of corner reinforcing members 32a to 32c, each with a welded portion 36a to 36c. The plurality of corner reinforcing members 32a to 32c have their plate surfaces facing the connection portion of the flat plate portion 33 of the corner connecting member 31. In other words, each of the corner reinforcing members 32a to 32c is arranged so that its plate surface is aligned with the z direction. With this configuration, the amount of material used by the corner reinforcing members 32a to 32c can be further reduced, making them lighter and efficiently improving the strength of the corner member 30. Furthermore, it is desirable that the corner reinforcing members 32a and 32c be positioned in a position corresponding to the reinforcing member 25 in the z direction. In other words, it is desirable that the corner reinforcing members 32a and 32c be positioned as close as possible to the end of the corner connecting member 31 in the z direction. Furthermore, in Figure 12, if the corner reinforcing members 32a and 32c are positioned in the area where the reinforcing member 25 is joined in the z direction, the corner reinforcing member 32b, which is positioned in the center in the z direction, can be omitted.

[0049] Figure 13 shows an example of the cross-sectional shape of a panel body 14 used in earth retaining panels 10, 1010, etc., according to Embodiment 1. The corner member 30B shown in Figure 12 has corner reinforcing members 32a to 32c and welded parts 36a to 36c arranged at three locations in the z direction, but the number of arrangements is not limited. For example, if the cross-sectional shape of the panel body 14 is a sine curve as shown in Figure 13, and there are four parts that protrude y(x) from the neutral axis N in the cross-sectional shape perpendicular to the first direction, then the corner reinforcing members 32 or welded parts 36 may be arranged at four locations corresponding to regions a1 to a4. Also, for example, if there are two parts that protrude y(x) from the neutral axis N in the cross-sectional shape of the panel body 14, then the corner reinforcing members 32 or welded parts 36 may be arranged at two locations corresponding to those protruding parts. Furthermore, the corner reinforcing members 32 or welded portions 36 do not need to correspond to the number of parts that protrude y(x) from the neutral axis N in the cross-sectional shape of the panel body 14, and may be provided only at positions corresponding to the reinforcing members 25.

[0050] Figure 14 is an explanatory diagram of a modified example of the arrangement of the corner reinforcing member 32 of the corner member 30 according to Embodiment 1. The corner member 30C is obtained by adding a corner reinforcing member 32A to the corner members 30, 30A, and 30B. The corner reinforcing member 32A is positioned closer to the connection between the two flat plate portions 33 of the corner connecting member 31 than the corner reinforcing member 32, and is positioned parallel to the corner reinforcing member 32. The welded portion 36 between the corner reinforcing member 32A and the corner connecting member 31 should be set in the same way as the corner reinforcing member 32 described above. However, the setting of the welded portion 36 of the corner reinforcing members 32 and 32A does not need to be the same, and the arrangement of the welded portion 36 may be different.

[0051] A method for manufacturing the corner member 30 according to Embodiment 1 will be described with reference to Figure 8. First, the corner member 30 is assembled by joining together the corner connecting member 31, the reinforcing member 25, and the vertical flange portion 19. The corner connecting member 31, the reinforcing member 25, and the vertical flange portion 19 are formed into a frame with a central opening.

[0052] The panel body 14 is fitted inside a frame with a central opening, formed from the corner connecting member 31, the reinforcing member 25, and the vertical flange portion 19. Once the panel body 14 is positioned in the predetermined location, the panel body 14 is joined to the vertical flange portion 19 and the flat plate portion 33 of the corner connecting member 31. The reinforcing member 25 and the panel body 14 are joined as needed.

[0053] In the above process, joining is performed by welding, but other joining methods such as brazing may also be used. Furthermore, since the corner member 30 comprises two panel bodies 14, the manufacturing process involves the steps of forming two frames and fitting the panel bodies 14 into each frame. The formation of each frame, the fitting of the panel bodies 14 into the frames, and the welding of the panel bodies 14 may be performed in parallel, or the process for one panel body 14 may be completed before the process for the other panel body 14 is performed.

[0054] Embodiment 2. The retaining wall structure 100 according to Embodiment 2 will now be described. The retaining wall structure 100 is a modified version of the retaining wall structure 100 according to Embodiment 1, with a modified structure of the corner member 30. Components having the same function and operation as those in Embodiment 1 are denoted by the same reference numerals, and their descriptions are omitted.

[0055] Figure 15 is a cross-sectional view of a corner member 230 of an earth retaining structure 100 according to Embodiment 2. Figure 15 shows a cross-section perpendicular to the z-direction. In Embodiment 1, the corner member 30 is constructed by joining a panel body 14 to two flat plate portions 33 of an L-shaped corner connecting member 31, but in Embodiment 2, the corner connecting member 31 is replaced with a steel pipe 131 with a rectangular cross-section. The corner member 230 is constructed by joining a panel body 14 to two adjacent faces of the steel pipe 131 with a rectangular cross-section.

[0056] In other words, the steel pipe 131, which has a rectangular cross-section, has a panel body 14 with a corrugated cross-section joined to two adjacent flat sections 33, and a further flat section 134 is connected to the tip 35 of the two flat sections 33, forming a tubular shape. In a cross-section perpendicular to the z-direction, the two flat sections 33 to which the panel body 14 is joined and the flat section 134 connected to them are formed to form the four sides of a rectangle.

[0057] Reinforcement members 132 may be arranged inside the steel pipe 131 on diagonal lines connecting the two tip ends 35. The reinforcement members 132 are fixed inside the steel pipe 131. By arranging the reinforcement members 132 on diagonal lines connecting the two tip ends 35, deformation in the direction in which the tip ends 35 move closer together can be suppressed. Furthermore, by partially welding and fixing the reinforcement members 132 inside the steel pipe 131, deformation in the direction in which the tip ends 35 move apart can also be suppressed. Note that the reinforcement members 132 may also be rotated 90° in Figure 15. In addition, the reinforcement members 132 may be arranged in a cross shape in Figure 15 and welded to connect the vertices of the rectangular cross-section steel pipe 131. Even if the reinforcement members 132 are changed as described above, the rigidity and strength of the steel pipe 131 will be improved.

[0058] In the case of the corner member 230, where the corner connecting member is a steel pipe 131, the reinforcing member 25 abuts against the outer peripheral edge of the flat plate portion 33 of the steel pipe 131 facing the z direction and the outer peripheral edge facing the y(x) or x(y) direction from the outside, and is joined, similar to Embodiment 1. In other words, the corner member 230 has been modified so that the corner connecting member is a steel pipe 131 and a flat plate portion 134 is added that is connected to the tip portion 35 of the flat plate portion 33 to which the panel body 14 is joined, but the reinforcing member 25 is joined to the flat plate portion 33 in the same way as the corner connecting member 31 in Embodiment 1. Note that even in the corner member 230, the reinforcing member 25 may be abutted against the flat plate portion 33 from the surface direction and joined.

[0059] In the second embodiment, the corner member 230 has high strength and rigidity as a corner connecting member itself, but the overall strength is improved by the addition of the reinforcing member 25. Therefore, even if the panel body 14 is not made of corrugated steel but of a flat plate, the corner member 230 can maintain relatively high strength.

[0060] Furthermore, as a modification of the corner member 130 according to Embodiment 2, instead of the reinforcing member 132, a filler material such as concrete may be filled into the interior 38 of the steel pipe 131. By filling the interior 138 of the steel pipe 131 with concrete, deformation of the steel pipe 131 can be suppressed, thus reinforcing the steel pipe 131 even without the reinforcing member 132. In addition, since the steel pipe 131 has a rectangular cross-sectional shape, it has relatively high strength even without the reinforcing member 132 and filler material, so it can be used as a corner member 230 without reinforcement.

[0061] Embodiment 3. The earth retaining structure 100 according to Embodiment 3 will now be described. The earth retaining structure 100 according to Embodiment 3 is a modified version of the earth retaining structure 100 according to Embodiment 1, with a modified structure of the corner member 30. Components having the same function and operation as those in Embodiment 1 are denoted by the same reference numerals, and their descriptions are omitted.

[0062] Figure 16 is a perspective view of the corner member 330 according to Embodiment 3. The corner member 330 according to Embodiment 3 includes an L-shaped corner connecting member 331 when viewed from the z direction. The corner connecting member 331 is composed of two flat plate portions 333 connected together, with the two flat plate portions 333 in an orthogonal positional relationship. The longitudinal direction of the flat plate portion 333 extends in the z direction. The flat plate portion 333 is provided with a connecting hole 339, which is configured to connect to the vertical flange portion 19 of the retaining wall panel 10. The corner member 330 is constructed by connecting the corner connecting member 331 and the retaining wall panel 10 using bolts and nuts. The retaining wall panel 10 is equipped with a reinforcing member 25 which is joined to the vertical flange portion 19. The corner connecting member 331 is connected to the vertical flange portion 19 using bolts and nuts. The connecting hole 339 through which the bolts are inserted is located in the region where the reinforcing member 25 of the retaining wall panel 10 is joined in the z direction.

[0063] The corner member 330 includes a corner reinforcing member 332 positioned between the two flat plate portions 333 of the corner connecting member 331 and joined by welding. The corner reinforcing member 332 is shaped to match the cross-sectional shape of the corner connecting member 331, conforming to the inside of the L-shape, and is a plate-like body with its surface oriented perpendicular to the z-direction. In plan view, the corner reinforcing member 332 has, for example, a triangular or substantially triangular shape. The corner reinforcing member 332 resists loads in the direction of spreading and narrowing the two flat plate portions 333 of the corner connecting member 331, and reinforces the corner connecting member 331. In Figure 16, the corner reinforcing member 332 is positioned between the connecting holes 339 and is provided in two locations, but the installation location can be appropriately changed depending on the required strength. In Embodiment 3, the corner reinforcing members 332a and 332c are positioned in the region where the reinforcing member 25 of the earth retaining panel 10 is joined in the z-direction.

[0064] Figure 17 is a front view of the corner member 330 according to Embodiment 3. By providing the corner reinforcing member 332 at a position corresponding to the reinforcing member 25 of the earth retaining panel 10, it can support the force transmitted from the reinforcing member 25, and the strength of the corner connecting member 331 can be efficiently improved.

[0065] Furthermore, the corner reinforcing members 332 may be positioned in a range corresponding to any of regions a1, a2, and a3 according to the waveform of the panel body 14 shown in Figure 3, and preferably within the ranges of regions aa1, aa2, and aa3. In other words, the corner reinforcing members 332 may be positioned in region A. In this case, both the corner reinforcing members 332 and the flat plate portions 333 may be positioned in each of the regions A. Note that the corner reinforcing members 332 and the flat plate portions 333 do not need to be positioned in all of the multiple regions A, but are positioned according to the required strength. Note that the corner reinforcing member 332b positioned in the center in the z direction in Figure 17 can be omitted.

[0066] The corner member 330 shown in Figure 16 may be further connected to the retaining wall panel 10 to form a retaining wall unit 50, or corner connecting members 331 may be connected to both ends of the retaining wall panel 10 to form a retaining wall unit 50.

[0067] Furthermore, as shown in Figure 16, the corner reinforcing member 332 is joined to the inside of the flat plate portion 333 of the corner connecting member 331 by welding. The welded portion 36 between the corner reinforcing member 332 and the flat plate portion 333 is located in a part of the flat plate portion 335 on the tip end side, but it may extend over the entire area where the corner reinforcing member 332 and the flat plate portion 33 are in contact. In addition, the corner reinforcing member 332 may have welded portions 36 on its upper and lower surfaces, or on only one surface.

[0068] (modified version) The corner reinforcing member 332 may be, for example, a steel bar. In this case, the corner reinforcing member 332 is welded to connect the tip portion 335 of the flat plate portion 33. In this case as well, the corner connecting member 331 of the corner member 330 can be efficiently strengthened by positioning the steel bar in the z-direction within the range where the vertical member 25c of the reinforcing member 25 is joined. Furthermore, since the corner reinforcing member 332 is provided on the corner connecting member 331, deformation of the flat plate portion 333 can be suppressed, and the strength of the axial connecting portion 11 formed by the flat plate portion 333 and the vertical flange portion 19 of the earth retaining panel 10 can be ensured in the same way as described in Embodiment 1.

[0069] The structure in which the corner reinforcing member 332 is welded to the corner connecting member 331 of Embodiment 3 with its surface facing the height direction (z direction) may also be applied to the corner members 30, 30A, and 30B of Embodiment 1. In that case, the corner reinforcing member 332 is preferably positioned in the z direction to correspond to the position where the reinforcing member 25 is joined (region C in Figure 5). Furthermore, the corner reinforcing members 332 may be positioned in accordance with the wave pattern of the panel body 14, for example, in the respective regions a1-a4 and aa1-aa4 shown in Figure 3 or Figure 5. When the corner reinforcing member 332 of Embodiment 3 is applied to the corner member 30 according to Embodiment 1, the corner member 30 has a panel body 14 and does not have connecting holes 339 in the corner connecting member 331 like the corner member 330, which has the advantage of greater freedom in positioning the corner reinforcing member 332.

[0070] The configurations shown in the above embodiments are merely examples, and the embodiments can be combined. For example, a retaining wall structure may be constructed using multiple corner members from among the corner members 30, 30A, 30B, 230, and 330. Furthermore, the panel body 14 is not limited to corrugated steel plates; it may be a simple flat plate or take on other forms. In addition, the above embodiments can be combined with other known technologies, and parts of the configuration can be omitted or modified without departing from the gist of the invention.

[0071] The corner members 30, 30A, 30B, 230, 330, and earth retaining structures 100 and 200 described above may also include combinations of the features shown in the following appendices 1 to 18. These combinations are shown below.

[0072] [Note 1] A corner member used in an earth retaining structure constructed by arranging multiple earth retaining panels along a wall formed by excavating the natural ground, wherein the first directions along the wall surface of two of the multiple earth retaining panels intersect, When the direction perpendicular to the first direction of each of the two connected earth retaining panels is defined as the second direction, the corner connecting member is connected such that the two flat plate portions form an L shape in the first cross section perpendicular to the second direction, In the first cross-section, a corner reinforcing member connects the tip portions of the two flat plate portions, Two panel bodies, with their surface facing the wall and positioned along the first direction of each of the two retaining panels, The two earth retaining panels are connected by two plate-shaped vertical flange sections, The corner connecting member comprises a reinforcing member joined to one of the two flat plate portions and one of the two vertical flange portions, Each of the two panel bodies is, One end face perpendicular to the first direction is joined to the respective plate surfaces of the two flat plate portions of the corner connecting member, and the other end face perpendicular to the first direction is joined to the plate surface of one of the two vertical flange portions. The reinforcing member is When a third direction is defined that is perpendicular to both the first and second directions, A corner member that is joined to one of the two flat plate portions and one of the two vertical flange portions of the corner connecting member from at least one of the second and third directions. [Note 2] The reinforcing member is A horizontal member perpendicular to the second direction, It comprises a vertical member perpendicular to the third direction, The horizontal member and the vertical member are connected to form an L-shaped cross-section perpendicular to the first direction. The corner member described in Appendix 1, which is joined to one of the two flat plate portions and one of the two vertical flange portions of the corner connecting member from a second direction and a third direction. [Note 3] The aforementioned horizontal member is A corner member as described in Appendix 2, having a through hole formed therein. [Note 4] Each of the two panel bodies is, The second direction is provided with lateral flange portions that protrude in the opposite direction to the wall surface at both ends, The aforementioned horizontal member is Arranged parallel to the aforementioned horizontal flange portion, The through hole provided in the aforementioned horizontal member is The corner member described in Appendix 3 is provided at a position corresponding to the through hole provided in the aforementioned lateral flange portion. [Note 5] When the area in which the joint between the reinforcing member and the corner connecting member is located in the second direction is defined as region B, The welded joint that connects the corner reinforcing member and the two flat plate portions is A corner member as described in any one of the appendices 1 to 4, which is positioned so as to overlap at least a portion of the aforementioned region B. [Note 6] The aforementioned corner reinforcing member is, The corner member described in Appendix 5, which is a steel plate having two opposing outer edges arranged along the tips of the two flat plate sections, and whose plate surface faces the connection portion of the two flat plate sections. [Note 7] The aforementioned corner reinforcing member is, Including multiple corner reinforcing members, Each of the aforementioned multiple corner reinforcing members is, The corner member described in Appendix 5 or 6, comprising the aforementioned welded portion. [Note 8] Each of the aforementioned multiple corner reinforcing members is, The corner member described in Appendix 7, which is arranged parallel to each other in the first cross-section and whose edges are joined to each of the two flat plate portions. [Note 9] The aforementioned corner connecting member is A corner member as described in any one of the appendices 1 to 6, wherein the cross-sectional shape of the steel pipe in the first cross-section is rectangular, and the two flat plate portions constitute two adjacent sides of the four sides that make up the rectangular cross-sectional shape. [Note 10] The aforementioned corner reinforcing member is, A corner member as described in Appendix 5, which is a steel plate with its surface oriented in the height direction. [Note 11] The aforementioned corner reinforcing member is, The corner member described in Appendix 5 is a steel bar welded to the tip of the flat plate portion, with its longitudinal direction intersecting the third direction. [Note 12] A retaining wall structure equipped with a corner member as described in any one of the appendices 1 to 11. [Note 13] A retaining wall structure constructed by arranging multiple retaining panels along a wall formed by excavating the natural ground, The system includes a corner member that connects two of the aforementioned retaining panels, with the first directions along the wall surfaces of each of the multiple retaining panels intersecting. The aforementioned multiple earth retaining panels are A panel body with its surface facing the wall and positioned along the first direction of each of the two retaining panels, The panel body is provided with vertical flange portions joined to both ends in the first direction, The aforementioned corner member is When the direction perpendicular to the first direction of each of the two connected earth retaining panels is defined as the second direction, the corner connecting member is formed such that the two flat plate portions form an L shape in the first cross section perpendicular to the second direction, The first cross-section comprises a corner reinforcing member that connects the tip portions of the two flat plate portions, The two earth-retaining panels mentioned above are The corner connecting member is connected to each of the two flat plate portions, A retaining structure comprising reinforcing members joined to the portion of the outer periphery of the vertical flange facing a second direction and the portion facing a third direction. [Note 14] When the area in which the joint between the reinforcing member and the corner connecting member is located in the second direction is defined as region C, The aforementioned corner reinforcing member is, The earth retaining structure described in Appendix 13, located in the aforementioned area C. [Note 15] The aforementioned corner reinforcing member is, A retaining wall structure as described in Appendix 13 or 14, which is a steel plate with its surface oriented in the height direction. [Note 16] The aforementioned corner reinforcing member is, The earth retaining structure described in Appendix 13 or 14, which is a steel bar arranged so as to intersect the longitudinal direction with the second direction and welded to the tip of the flat plate portion. [Note 17] The vertical flange portion of the two earth retaining panels and the flat plate portion of the corner connecting member are, A retaining structure as described in any one of the appendices 13 to 16, wherein connecting holes are formed at corresponding positions and the structures are connected by bolts and nuts. [Note 18] When the area in which the joint between the reinforcing member and the corner connecting member is located in the second direction is defined as region C, The aforementioned connecting hole is A retaining structure as described in Appendix 17, located in the aforementioned area C. [Explanation of symbols]

[0073] 10 Retaining wall panel, 11 Axial connecting section, 13 Horizontal flange section, 13a (Second) connecting hole, 14 Panel body, 15 Web section, 16 Protrusion section, 16a Inner wall section, 17 (Second) Outer wall section, 17b Outer wall section, 18 (First) Outer wall section, 19 Vertical flange section, 19a (First) connecting hole, 25 Reinforcement member, 25b Horizontal member, 25c Vertical member, 30 Square member, 30A Square member, 30B Square member, 30C Square member, 31 Square connecting member, 32 Square reinforcement member, 32A Square reinforcement member, 32a Square reinforcement member, 32b Square reinforcement member, 32c Square reinforcement member, 33 Flat plate section, 35 Tip section, 36 Welded section, 36a Welded section, 36b Welded section, 36c Welded section, 37 Both ends, 38 Interior, 40 Connecting member, 50 Retaining wall unit, 92 Ground, 93 Space, 95 Excavation wall, 100 Retaining structure, 101B Retaining panel, 101C Retaining panel, 130 Square member, 131 Steel pipe, 132 Reinforcement member, 134 Flat plate section, 138 Interior, 200 Retaining structure, 230 Square member, 330 Square member, 331 Square connecting member, 332 Square reinforcement member, 332a Square reinforcement member, 332b Square reinforcement member, 332c Square reinforcement member, 333 Flat plate section, 335 Tip section, 339 Connecting hole, 1010 Retaining panel, 1030 Square member, A area, B area, C area, N Neutral axis, a1 area, a2 area, a3 area, a4 area, aa1 area, aa2 area, aa3 area, c central axis.

Claims

1. A corner member used in an earth retaining structure constructed by arranging multiple earth retaining panels along a wall formed by excavating the natural ground, wherein the first directions along the wall surface of two of the multiple earth retaining panels intersect, When the direction perpendicular to the first direction of each of the two connected earth retaining panels is defined as the second direction, the corner connecting member is connected such that the two flat plate portions form an L shape in the first cross section perpendicular to the second direction, In the first cross-section, a corner reinforcing member connects the tips of the two flat plate portions, Two panel bodies are arranged with their surface facing the wall and along the first direction of each of the two retaining panels, The two earth retaining panels are connected by two plate-shaped vertical flange sections, The corner connecting member comprises a reinforcing member joined to one of the two flat plate portions and one of the two vertical flange portions, The aforementioned corner reinforcing member is a plate-shaped member whose longitudinal direction extends in the second direction, In the longitudinal direction, the corner reinforcing member extends from near one end to near the other end of the corner connecting member. Each of the two panel bodies is, One end face perpendicular to the first direction is joined to the respective plate surfaces of the two flat plate portions of the corner connecting member, and the other end face perpendicular to the first direction is joined to the plate surface of one of the two vertical flange portions. The reinforcing member is When a third direction is defined that is perpendicular to both the first and second directions, A corner member that is joined to one of the two flat plate portions and one of the two vertical flange portions of the corner connecting member from at least one of the second and third directions.

2. The reinforcing member is A horizontal member perpendicular to the second direction, It comprises a vertical member perpendicular to the third direction, The horizontal member and the vertical member are connected to form an L-shaped cross-section perpendicular to the first direction. The corner member according to claim 1, wherein one of the two flat plate portions and one of the two vertical flange portions of the corner connecting member are joined from a second direction and a third direction.

3. The aforementioned horizontal member is The corner member according to claim 2, wherein a through hole is formed therein.

4. Each of the two panel bodies is, The second direction is provided with lateral flange portions that protrude in the opposite direction to the wall surface at both ends, The aforementioned horizontal member is Arranged parallel to the aforementioned horizontal flange portion, The through hole provided in the aforementioned horizontal member is The corner member according to claim 3, provided at a position corresponding to the through hole provided in the lateral flange portion.

5. When the area in which the joint between the reinforcing member and the corner connecting member is located in the second direction is defined as region C, The welded joint that connects the corner reinforcing member and the two flat plate portions is The corner member according to any one of claims 1 to 4, which is arranged so as to overlap at least a portion of the region C.

6. The aforementioned corner reinforcing member is The corner member according to claim 5, wherein two opposing outer edges are arranged along the tip portions of the two flat plate portions, and the plate surface is facing the connecting portion of the two flat plate portions.

7. The aforementioned corner reinforcing member is Including multiple corner reinforcing members, Each of the aforementioned multiple corner reinforcing members is, The corner member according to claim 5, comprising the aforementioned welded portion.

8. Each of the aforementioned multiple corner reinforcing members is, The corner member according to claim 7, wherein the corner members are arranged parallel to each other in the first cross-section and their edges are joined to each of the two flat plate portions.

9. The aforementioned corner connecting member is The corner member according to any one of claims 1 to 4, wherein the steel pipe has a rectangular cross-sectional shape in the first cross-section, and the two flat plate portions constitute two adjacent sides of the four sides that make up the rectangular cross-sectional shape.

10. A retaining wall structure comprising a corner member as described in any one of claims 1 to 4.

11. A retaining wall structure constructed by arranging multiple retaining panels along a wall formed by excavating the natural ground, The corner member is provided to connect two of the aforementioned plurality of retaining panels, with the first directions along the wall surfaces of each of the retaining panels intersecting. The aforementioned multiple earth retaining panels are A panel body positioned with its surface facing the wall and along the first direction of each of the two retaining panels, The panel body is provided with vertical flange portions joined to both ends in the first direction, The aforementioned corner member is When the direction perpendicular to the first direction of each of the two connected earth retaining panels is defined as the second direction, the corner connecting member is formed such that the two flat plate portions form an L shape in the first cross section perpendicular to the second direction, The first cross-section comprises a corner reinforcing member that connects the tip portions of the two flat plate portions, The aforementioned corner reinforcing member is a plate-shaped member whose longitudinal direction extends in the second direction, In the longitudinal direction, the corner reinforcing member extends from near one end to near the other end of the corner connecting member. The two earth-retaining panels mentioned above are The corner connecting member is connected to each of the two flat plate portions, A retaining wall structure comprising reinforcing members joined to the portion of the outer periphery of the vertical flange facing a second direction and the portion facing a third direction.

12. When the area in which the joint between the reinforcing member and the corner connecting member is located in the second direction is defined as region C, The aforementioned corner reinforcing member is The earth retaining structure according to claim 11, which is located in the aforementioned region C.

13. The vertical flange portion of the two earth retaining panels and the flat plate portion of the corner connecting member are The earth retaining structure according to claim 11 or 12, wherein connecting holes are formed at corresponding positions and are connected by bolts and nuts.

14. When the area in which the joint between the reinforcing member and the corner connecting member is located in the second direction is defined as region C, The aforementioned connecting hole is The earth retaining structure according to claim 13, which is arranged in the aforementioned region C.

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