Connecting device, embankment structure, and method for constructing an embankment structure

Abstract

The present invention provides a connector that links foamed resin blocks together, thereby improving the stability of embankment structures. [Solution] The connector 1 in the embodiment comprises a pair of insertion plate portions 2, 2 and a connecting plate portion 3 that connects the pair of insertion plate portions 2, 2. The insertion plate portion 2 has a bent plate portion 21 that is connected to the connecting plate portion 3 and formed by bending, and a first claw portion 23 and a second claw portion 24 that protrude from the bent plate portion 21 in opposite directions. The first claw portion 23 and the second claw portion 24 have top portions 23a and 24a on the extension of the corners of the bent plate portion 21, and the connector 3 further comprises a top plate portion 37 that is formed by bending perpendicularly.

Description

Technical Field

[0001] The present invention relates to a connector, an earth retaining structure, and a method for constructing an earth retaining structure.

Background Art

[0002] There is known a lightweight earth retaining structure in which earth retaining panels are attached to a plurality of foam resin blocks arranged side by side vertically and horizontally. When constructing such a lightweight earth retaining structure, in order to equalize the load distribution, adjust unevenness, prevent buoyancy, and further protect the foam resin blocks, when the foam resin blocks are stacked to a height of about 3 m, a concrete layer called an intermediate concrete floor slab is constructed thereon. Further foam resin blocks are stacked thereon, and if necessary, an intermediate concrete floor slab is further constructed, and this is repeated until finally a concrete layer called an upper concrete floor slab is constructed, and an upper structure such as a road is constructed on the upper surface thereof.

[0003] When the foam resin blocks constituting the lightweight earth retaining structure are installed independently of each other, there is a concern about the displacement of the foam resin blocks due to seismic vibration. Therefore, as a technique for connecting the foam resin blocks to resist seismic vibration, the connector of Patent Document 1 is disclosed. The connector of Patent Document 1 includes a pair of insertion plate portions having a connecting plate portion, a pressure receiving plate portion, a first claw portion, and a second claw portion, and a connecting plate portion for connecting the pair of insertion plate portions. In the connector of Patent Document 1, the connecting plate portion, the pressure receiving plate portion, the first claw portion, and the connecting plate portion are inserted into the first foam resin block, and the second claw portion is inserted into the second foam resin block. Thereby, in the connector of Patent Document 1, the first foam resin block and the second foam resin block can be connected.

[0004] In the connector described in Patent Document 1, when inserting the second claw portion into the second foamed resin block, the second foamed resin block is pushed towards the connector, which is partially inserted into the first foamed resin block. However, in the connector described in Patent Document 1, the main surface of the portion inserted into the first foamed resin block is formed along the insertion direction of the first claw portion. Therefore, in the connector described in Patent Document 1, for example, if the foamed resin block has high strength, when the second foamed resin block is pushed toward the second claw portion, the portion of the connector that was inserted into the first foamed resin block is pushed further in, and there is a risk that the base end of the second claw portion will also be inserted into the first foamed resin block. As a result, in the connector described in Patent Document 1, an appropriate insertion depth of the second claw portion into the second foamed resin block cannot be secured, and further stability of the embankment structure was required. [Prior art documents] [Patent Documents]

[0005] [Patent Document 1] Japanese Patent Publication No. 2023-122393 [Overview of the project] [Problems that the invention aims to solve]

[0006] Therefore, the present invention was devised in view of the above-mentioned problems, and its objective is to provide a connector, an embankment structure, and a method for constructing an embankment structure that can connect foamed resin blocks for embankment construction and improve the stability of the embankment structure. [Means for solving the problem]

[0007] The connector according to the present invention is a connector for connecting foamed resin blocks for embankment, comprising a pair of insertion plate portions and a connecting plate portion that connects the pair of insertion plate portions, wherein the insertion plate portion has a bent plate portion that is connected to the connecting plate portion and formed by bending, and a first claw portion and a second claw portion that protrude from the bent plate portion in opposite directions, and the first claw portion and the second claw portion have their tops on the extension of the corner portion of the bent plate portion. before Connection plate section The end portion of the second claw in the direction of protrusion It is further characterized by comprising a top plate portion formed by being folded vertically.

[0008] The embankment structure according to the present invention is an embankment structure in which a first foamed resin block and a second foamed resin block are connected using a connector according to the present invention, characterized in that the first claw portion, the bent plate portion and the connecting plate portion are inserted into the first foamed resin block, the second claw portion is inserted into the second foamed resin block, and the top plate portion is in contact with the first foamed resin block.

[0009] The method for constructing an embankment structure according to the present invention is a method for constructing an embankment structure in which adjacent first foamed resin blocks and second foamed resin blocks are connected using a connector according to the present invention, The top plate is struck, The method is characterized by a first claw insertion step of inserting the first claw portion, the bent plate portion, and the connecting plate portion into a first foamed resin block, a second claw insertion step of inserting the second claw portion into a second foamed resin block, and in the first claw insertion step, the top plate portion being brought into contact with the first foamed resin block. [Effects of the Invention]

[0010] In this invention, at least one of the insertion plate portion and the connecting plate portion is further provided with a top plate portion formed by being bent vertically. This allows the top plate portion to come into contact with the first foamed resin block. As a result, the top plate portion acts as a stopper as a pressure-receiving surface, preventing the first claw portion, the bent plate portion, and the connecting plate portion from being inserted excessively deeply into the first foamed resin block when the second foamed resin block is pushed toward the second claw portion. Therefore, the insertion depth of the second claw portion into the second foamed resin block can be ensured. As a result, this invention can improve the stability of the embankment structure. [Brief explanation of the drawing]

[0011] [Figure 1] Figure 1 is a front view showing the embankment structure in the first embodiment. [Figure 2] Figure 2 is a front view showing the connector in the first embodiment. [Figure 3] Figure 3 is a perspective view showing the connector in the first embodiment. [Figure 4] Figure 4(a) is a front view showing the connector in the first embodiment, and Figure 4(b) is a cross-sectional view showing the connector in the first embodiment. [Figure 5] Figures 5(a) and 5(b) illustrate the method for constructing the embankment structure in the first embodiment. [Figure 6] Figures 6(a) and 6(b) illustrate the method for constructing an embankment structure in the first embodiment. [Figure 7] Figure 7 is a perspective view showing the connector in the second embodiment. [Modes for carrying out the invention]

[0012] Hereinafter, an example of a connector, an embankment structure, and a method for constructing an embankment structure as embodiments of the present invention will be described with reference to the drawings.

[0013] <First Embodiment>

[0014] As shown in Fig. 1, the embankment structure 100 is a lightweight embankment constructed on the back approach of a bridge pier, mountain slopes, soft ground, etc. The embankment structure 100 mainly includes a plurality of foam resin blocks 7 for embankment and a floor slab 6 provided on the foam resin block 7. The floor slab 6 has an intermediate floor slab where the foam resin blocks 7 are arranged vertically and an upper floor slab arranged above the uppermost foam resin block 7. An upper structure 9 such as a road is provided on the upper floor slab. On the surface of the foam resin block 7, a protective wall body 8 is provided to prevent the deterioration of the foam resin block 7. The protective wall body 8 is composed of, for example, a panel material made of concrete. The protective wall body 8 is fixed to a support column 82 erected on a foundation concrete 81.

[0015] The embankment structure 100 includes a plurality of foam resin blocks 7 for embankment and a connector 1 for connecting adjacent foam resin blocks 7. The connector 1 includes a pair of insertion plate portions 2, 2 and a connecting plate portion 3 for connecting the pair of insertion plate portions 2, 2. For the sake of explanation, the direction in which the pair of insertion plate portions 2, 2 are separated is defined as the left - right direction X, the direction intersecting the left - right direction X is defined as the front - back direction Y, and the direction intersecting both the left - right direction X and the front - back direction Y is defined as the up - down direction Z.

[0016] The foam resin block 7 is a foam resin block (EPS block) for embankment. The material of the foam resin block 7 can adopt a foam made of synthetic resins such as polystyrene, polyurethane, and polyvinyl chloride. The foam resin block 7 is formed in a rectangular parallelepiped shape. The foam resin blocks 7 are constructed by stacking a plurality of them in a staggered or grid pattern with their positions shifted in the up - down direction and the planar direction. The foam resin block 7, for example, has a weight of 12 kg to 30 kg per piece, is easy to carry, and is preferably adopted because it has excellent workability in the construction operation of lightweight embankments.

[0017] The foam resin block 7 has a first foam resin block 71 and a second foam resin block 72.

[0018] The connecting tool 1 may be used to connect adjacent first and second foamed resin blocks 71 and 72. In this embodiment, the connecting tool 1 connects, for example, one first foamed resin block 71 and one second foamed resin block 72 that is adjacent to the first foamed resin block 71 in the vertical direction Z.

[0019] As shown in FIGS. 2, 3, 4(a), and 4(b), the connecting tool 1 is formed by bending a single plate material having a predetermined shape. The material of the connecting tool 1 is, for example, made of steel, resin, or the like. When the connecting tool 1 is made of steel, it is formed by bending a steel plate, for example. When the connecting tool 1 is made of resin, it is formed by bending it into a predetermined shape by molding such as injection. The plate thickness of the connecting tool 1 is preferably about 0.6 mm to 1.0 mm, for example, but it is arbitrary.

[0020] The insertion plate portions 2 are arranged in a pair at a distance in the left - right direction X. The insertion plate portions 2 have an L - shaped bent plate portion 21, and a first claw portion 23 and a second claw portion 24 that extend in opposite directions while sandwiching the bent plate portion 21.

[0021] The bent plate portion 21 is continuous with the connecting plate portion 3 and is bent vertically with the side facing the lateral direction being oriented in the front - rear direction Y, and is formed in an L - shape when viewed from the vertical direction Z. One bent plate portion 21 is bent toward the front side Y1, and the other bent plate portion 21 is bent toward the rear side Y2.

[0022] On the side end surface on the front - rear direction Y side of the bent plate portion 21, a protruding piece 21a that protrudes in a triangular shape is formed. The protruding piece 21a is inclined with respect to the insertion direction of the bent plate portion 21. This makes it easier to insert the bent plate portion 21 into the first foamed resin block 71.

[0023] The first claw portion 23 is formed along the bent plate portion 21. The first claw portion 23 protrudes downward toward Z1. The first claw portion 23 is formed in an L - shape when viewed from the vertical direction Z. Thus, when the first claw portion 23 is inserted into the first foamed resin block 71, pressure - receiving surfaces in the left - right direction X and the front - rear direction Y can be secured.

[0024] The top 23a of the first claw portion 23 is formed on the extension of the corner of the bent plate portion 21. This makes it easier to insert the first claw portion 23 into the first foamed resin block 71 than if the top 23a were not formed on the extension of the corner of the bent plate portion 21.

[0025] The first claw portion 23 extends in the left-right direction X and the front-rear direction Y. The side end face of the first claw portion 23 has an inclined portion that slopes from the top portion 23a and a vertical portion that extends from this inclined portion along the up-down direction Z.

[0026] The first claw portion 23 has a notch 23b formed by cutting out the vertical portion of the side end face on the left-right X side. This prevents the first claw portion 23 from being pulled out when it is inserted into the first foamed resin block 71. The notch 23b is formed, for example, by cutting out a rectangular shape.

[0027] The first claw portion 23 has a triangular projection 23c formed on the vertical portion of the side end face on the front-rear direction Y side. The projection 23c is connected to the projection 21a and is inclined with respect to the insertion direction of the first claw portion 23. This makes it easier to insert the first claw portion 23 into the first foamed resin block 71.

[0028] The second claw portion 24 is formed along the bent plate portion 21. The second claw portion 24 protrudes upward Z2. When viewed from the vertical direction Z, the second claw portion 24 is formed in an L shape. This ensures that when the second claw portion 24 is inserted into the second foamed resin block 72, pressure receiving surfaces are secured in the left-right direction X and the front-back direction Y.

[0029] The top portion 24a of the second claw portion 24 is formed on the extension of the corner of the bent plate portion 21. This makes it easier to insert the second claw portion 24 into the second foamed resin block 72 than if the top portion 24a were not formed on the extension of the corner of the bent plate portion 21.

[0030] The second claw portion 24 extends in the left-right direction X and the front-rear direction Y. The side end face of the second claw portion 24 has an inclined portion that slopes from the top portion 24a and a vertical portion that extends from this inclined portion along the up-down direction Z.

[0031] The second claw portion 24 has a notch 24b formed by cutting out the vertical portion of the side end face on the left-right X side. This prevents the second claw portion 24 from being pulled out when it is inserted into the second foamed resin block 72. The notch 24b is formed, for example, by cutting out a triangular shape.

[0032] The second claw portion 24 has a notch 24c formed by cutting out the vertical portion of the side end face on the front-rear direction Y side. This prevents the second claw portion 24 from being pulled out when it is inserted into the second foamed resin block 72. The notch 24c is formed, for example, by cutting out a triangular shape.

[0033] The second claw portion 24 has a return surface 24d formed at its rear end, which is connected to the bent plate portion 21. The return surface 24d is formed parallel to a plane perpendicular to the vertical direction Z. In the vertical direction Z, the return surface 24d is positioned at the same location as the top plate portion 37 at the upper end of the connecting plate portion 3. As a result, when the bent plate portion 21 is inserted into the first foamed resin block 71, the return surface 24d contacts the first foamed resin block 71, preventing the second claw portion 24 from being inserted into the first foamed resin block 71.

[0034] The second claw portion 24 has a through hole 25 formed therein. By hooking a pulling member such as a hook into the through hole 25, the first claw portion 23 inserted into the first foamed resin block 71 can be removed.

[0035] The connecting plate portion 3 connects the pair of insertion plate portions 2, 2. The connecting plate portion 3 has a third claw portion 34 that protrudes downward Z1, which is the protruding direction of the first claw portion 23. This allows the connecting plate portion 3 to be easily inserted into the first foamed resin block 71. Therefore, the operation of connecting the foamed resin blocks 7 can be easily performed.

[0036] The top 34a of the third claw portion 34 and the top 23a of the first claw portion 23 are positioned at the same location in the vertical direction Z. The third claw portion 34 may be omitted.

[0037] The connector 1 further comprises a top plate portion 37 formed by bending perpendicularly to the connecting plate portion 3. The top plate portion 37 is formed by bending from the upper end of the connecting plate portion 3 toward the front side Y1.

[0038] In the embankment structure 100, the bent plate portion 21, the first claw portion 23, and the connecting plate portion 3 are inserted into the first foamed resin block 71, and the second claw portion 24 is inserted into the second foamed resin block 72.

[0039] In the embankment structure 100, the return surface 24d contacts the first foamed resin block 71. In the embankment structure 100, the top plate portion 37 contacts the first foamed resin block 71 and the second foamed resin block 72.

[0040] <Methods for constructing embankment structures> Next, the method for constructing the embankment structure will be explained. The method for constructing the embankment structure involves using a connector 1 to connect the first foamed resin block 71 and the second foamed resin block 72, which are adjacent to each other in the vertical Z direction.

[0041] The method for constructing an embankment structure comprises a first claw insertion step and a second claw insertion step.

[0042] First, as shown in Figures 5(a) and 5(b), in the first claw insertion step, multiple first foamed resin blocks 71 are arranged in advance. Then, in the first claw insertion step, the first claw portion 23, the bent plate portion 21, and the connecting plate portion 3 are inserted into the first foamed resin block 71. At this time, two first claw portions 23 are inserted into one first foamed resin block 71.

[0043] In detail, during the first claw insertion step, the top 23a of the first claw 23 and the top 34a of the third claw 34 are brought into contact with the first foamed resin block 71, and an incision is formed in the first foamed resin block 71 using a cutter or the like. This makes it easier to insert the first claw 23 and the third claw 34 into the first foamed resin block 71.

[0044] Then, in the first claw insertion step, the top plate portion 37 of the connecting plate portion 3 is struck using a striking means such as a hammer, and the first claw portion 23 and the third claw portion 34 are inserted into the notches formed in the first foamed resin block 71.

[0045] Then, in the first claw insertion step, the top plate portion 37 of the connecting plate portion 3 is further struck using a striking means such as a hammer, and the bent plate portion 21 and the connecting plate portion 3 are inserted into the first foamed resin block 71.

[0046] In the first claw insertion step, the top plate portion 37 is brought into contact with the first foamed resin block 71. This causes the top plate portion 37 to act as a pressure-receiving surface and a stopper, preventing the bending plate portion 21, the first claw portion 23, and the connecting plate portion 3 from being excessively inserted into the first foamed resin block 71, and preventing the second claw portion 24 from being inserted into the first foamed resin block 71.

[0047] In the first claw insertion step, when the first claw portion 23 and the connecting plate portion 3 are inserted into the first foamed resin block 71, the return surface 24d of the second claw portion 24 comes into contact with the first foamed resin block 71. This prevents the second claw portion 24 from being inserted into the first foamed resin block 71.

[0048] In this way, during the first claw insertion step, the first claw portion 23, the bent plate portion 21, and the connecting plate portion 3 are inserted into the first foamed resin block 71, and the top plate portion 37 is brought into contact with the first foamed resin block 71.

[0049] The connecting plate portion 3 may be positioned across two first foamed resin blocks 71 adjacent to each other in the left-right direction X. In this case, the connecting plate portion 3 functions as a stopper to prevent the two first foamed resin blocks 71 from shifting.

[0050] If the first claw portion 23 or the connecting plate portion 3 cannot be inserted into the first foamed resin block 71 in the specified position, the connector 1 is removed from the first foamed resin block 71 and reinserted. When the first claw portion 23 or the connecting plate portion 3 is inserted into the first foamed resin block 71, the through hole 25 is exposed. Therefore, it becomes easy to remove the connector 1 from the first foamed resin block 71 by hooking a pull-out member such as a hook into the through hole 25.

[0051] Next, as shown in Figures 6(a) and 6(b), in the second claw insertion step, the second foamed resin block 72 is pushed downward Z1 toward the second claw portion 24 protruding from the first foamed resin block 71, thereby inserting the second claw portion 24 into the second foamed resin block 72. At this time, a pair of second claw portions 24 are also inserted into one second foamed resin block 72. This allows the first foamed resin block 71 and the second foamed resin block 72 to be stacked in a staggered pattern.

[0052] In the second claw insertion step, when inserting the second claw 24 into the second foamed resin block 72, the second foamed resin block 72 is pushed downward Z1 toward the second claw 24 which protrudes upward Z2 from the first foamed resin block 71. At this time, the top plate 37 is in contact with the first foamed resin block 71, so when the second foamed resin block 72 is pushed downward Z1, the top plate 37 acts as a pressure receiving surface and acts as a stopper, suppressing excessive insertion of the folded plate 21, the first claw 23 and the connecting plate 3 into the first foamed resin block 71, and suppressing insertion of the second claw 24 into the first foamed resin block 71.

[0053] In the second claw insertion step, the top plate portion 37 is brought into contact with the second foamed resin block 72. This allows the first foamed resin block 71 and the second foamed resin block 72 to be stacked without any gaps.

[0054] This concludes one example of a method for constructing an embankment structure.

[0055] In this embodiment, the connecting plate portion 3 is further provided with a top plate portion 37 formed by bending it perpendicularly. This allows the top plate portion 37 to come into contact with the first foamed resin block 71. As a result, the top plate portion 37 acts as a stopper as a pressure-receiving surface, preventing the first claw portion 23, the bent plate portion 21, and the connecting plate portion 3 from being inserted excessively deeply into the first foamed resin block 71 when the second foamed resin block 72 is pushed and inserted toward the second claw portion 24. Therefore, the connector 1 can ensure the insertion depth of the second claw portion 24 toward the second foamed resin block 72. As a result, the connector 1 can improve the stability of the embankment structure 100.

[0056] According to this embodiment, the structure has a pair of insertion plate portions 2, 2, and the insertion plate portion 2 is connected to the connecting plate portion 3 and has a bent plate portion 21 formed by bending it into an L-shape. As a result, the connecting plate portion 3 and the bent plate portion 21 can resist external forces such as seismic motion in the front-rear direction Y and the left-right direction X. Therefore, it is possible to improve the resistance of the foamed resin block 7 to external forces such as seismic motion in the left-right direction X and the front-rear direction Y acting on it.

[0057] According to this embodiment, the bent plate portion 21 is flanked by a first claw portion 23 and a second claw portion 24 that extend in opposite directions in the vertical direction Z. This allows the first claw portion 23 to be inserted into the first foamed resin block 71 and the second claw portion 24 to be inserted into the second foamed resin block 72, ensuring sufficient insertion depth and rigidity for each. As a result, it is possible to adequately resist not only external forces such as seismic motion in the left-right direction X and the front-back direction Y, but also external forces such as seismic motion in the vertical direction Z. Consequently, even if seismic motion occurs, displacement of the foamed resin block 7 and deformation of the connector 1 can be prevented.

[0058] <Second Embodiment> Next, a second embodiment will be described. Detailed explanations of configurations similar to those described above will be omitted below.

[0059] As shown in Figure 7, the connector 1 further comprises a top plate portion 37 formed by bending the connecting plate portion 3 perpendicularly. Multiple top plate portions 37 are formed by bending the end of the connecting plate portion 3 on the second claw portion 24 side toward the front side Y1 and the rear side Y2.

[0060] The connector 1 of the above-described embodiment further comprises a top plate portion 37 formed by bending the connecting plate portion 3 perpendicularly. In the present invention, the connector may also comprise a top plate portion 37 formed by bending the insertion plate portion 2 perpendicularly. In this case, the top plate portion 37 is positioned, for example, on the boundary between the bent plate portion 21 and the second claw portion 24. The top plate portion 37 may be formed by bending the upper end of the bent plate portion 21 perpendicularly, for example. The top plate portion 37 may be formed by bending the lower end of the second claw portion 24 perpendicularly, for example.

[0061] In the connector 1 of the above-described embodiment, one bent plate portion 21 is bent toward the front side Y1, and the other bent plate portion 21 is bent toward the rear side Y2. In the connector of the present invention, each of the pair of bent plate portions 21 may be bent toward the front side Y1. In the connector of the present invention, each of the pair of bent plate portions 21 may be bent toward the rear side Y2.

[0062] In the above-described embodiment, the connector 1 connects adjacent foamed resin blocks 7 in the vertical direction Z. However, in the present invention, adjacent foamed resin blocks 7 in the horizontal direction X may be connected, or adjacent foamed resin blocks 7 in the front-rear direction Y may be connected.

[0063] Furthermore, in the embodiment described above, one first foamed resin block 71 and one second foamed resin block 72 were connected by a connector 1, but in the present invention, two first foamed resin blocks 71 and one second foamed resin block 72 may be connected. In this case, one first claw portion 23 is inserted into one first foamed resin block 71, and the other first claw portion 23 is inserted into the other first foamed resin block 71. A pair of second claw portions 24 are inserted into one second foamed resin block 72.

[0064] In addition, in this invention, two first foamed resin blocks 71 and two second foamed resin blocks 72 may be connected by a connector 1. In this case, one first claw portion 23 is inserted into one first foamed resin block 71, and the other first claw portion 23 is inserted into the other first foamed resin block 71. Also, one second claw portion 24 is inserted into one second foamed resin block 72, and the other second claw portion 24 is inserted into the other second foamed resin block 72.

[0065] While several embodiments of the present invention have been described, these embodiments are presented as examples only and are not intended to limit the scope of the invention. These novel embodiments can be carried out in a variety of other forms, and various omissions, substitutions, and modifications can be made without departing from the spirit of the invention. These embodiments and their variations are included in the scope and spirit of the invention, as well as in the claims of the invention and its equivalents. [Explanation of Symbols]

[0066] 100: Embankment structure 1: Connector 2: Insertion plate section 21: Folded plate section 21a: Projection piece 23: 1st claw part 23a: Top 23b: Notch 23c: Projection piece 24:Second claw part 24a: Top 24b: Notch 24c: Notch 24d: Return face 25: Through hole 3: Connecting plate part 34: 3rd claw part 34a: Top 37: Top panel 7: Foamed resin block 71: First foamed resin block 72: Second foamed resin block X: Left / right direction X1:Front side X2: Back side Y: Forward and backward direction Y1: Front Side Y2: Back side Z: Up / Down direction Z1: Below Z2: Above

Claims

1. A connector for joining foamed resin blocks used for embankment, A pair of insertion plate sections, It comprises a connecting plate portion that connects a pair of the aforementioned insertion plate portions, The aforementioned insertion plate portion is A bent plate portion is formed by being connected to the aforementioned connecting plate portion and by being bent, It has a first claw portion and a second claw portion that protrude from the bent plate portion in opposite directions, The first claw portion and the second claw portion have their tops on the extension of the corner portion of the bent plate portion, The connecting plate portion is further provided with a top plate portion that is formed by being bent vertically at the end of the second claw portion in the protruding direction. A connector characterized by the following.

2. The top plate portion is formed by bending the connecting plate portion in one direction from the end of the second claw portion in the protruding direction. The connector according to claim 1, characterized by the following:

3. The top plate portion is formed by bending a plurality of these portions in opposite directions from the end of the connecting plate portion in the direction of protrusion of the second claw portion. The connector according to claim 1, characterized by the following:

4. An embankment structure comprising connecting a first foamed resin block and a second foamed resin block using a connector according to any one of claims 1 to 3, The first claw portion, the bent plate portion, and the connecting plate portion are inserted into the first foamed resin block. The second claw portion is inserted into the second foamed resin block, The top plate portion is in contact with the first foamed resin block. An embankment structure characterized by the following:

5. A method for constructing an embankment structure, wherein adjacent first foamed resin blocks and second foamed resin blocks are connected using a connecting device described in any one of claims 1 to 3, The first claw insertion step involves striking the top plate portion and inserting the first claw portion, the bent plate portion, and the connecting plate portion into the first foamed resin block, A second claw insertion step in which the second claw portion is inserted into the second foamed resin block, In the first claw insertion step, the top plate is brought into contact with the first foamed resin block. A method for constructing embankment structures characterized by the following.

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