Wall member

Abstract

To provide a wall member capable of shortening the work time required to connect a lower wall member below an existing upper wall member.SOLUTION: The wall member includes a wall portion, an upper flange portion formed along the upper edge of the wall portion, and a lower flange portion formed along the lower edge of the wall portion. The upper flange portion has an upper bolt hole formed therein that penetrates the upper flange portion, and the lower flange portion has a lower bolt hole formed therein that penetrates the lower flange portion. The opening area of the lower bolt hole on the lower surface of the lower flange portion is larger than the opening area of the lower bolt hole on the upper surface of the lower flange portion.SELECTED DRAWING: Figure 4

Description

Technical Field

[0001] The present invention relates to a wall member.

Background Art

[0002] Conventionally, as disclosed in Patent Document 1 for example, a construction method of a wall member is known in which a first wall member having a plurality of through holes is lifted using a suspension jig and connected to a second wall member having a plurality of through holes. In this construction method of the wall member, with a part of the suspension jig inserted through the through hole and the first wall member lifted, it is arranged below the already installed second wall member, and a part of the suspension jig inserted through the through hole of the first wall member is inserted through the through hole of the second wall member for positioning, and the first wall member and the second wall member are connected.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] However, if the position of the through hole of the first wall member is different from the centroid position of the first wall member, when the first wall member is lifted using the suspension jig, the first wall member will be in an inclined state with respect to the second wall member. When the first wall member is in an inclined state, the operation of inserting a part of the suspension jig inserted through the through hole of the first wall member through the through hole of the second wall member may take a long time. Therefore, there has been a problem that the working time for connecting the first wall member and the second wall member becomes long.

[0005] The present invention solves the above problems, and an object thereof is to provide a wall member capable of shortening the working time when connecting a lower wall member below an existing upper wall member.

Means for Solving the Problems

[0006] The wall member according to the present invention includes a wall surface portion, an upper flange portion formed along the upper edge of the wall surface portion, and a lower flange portion formed along the lower edge of the wall surface portion. An upper bolt hole penetrating the upper flange portion is formed in the upper flange portion, and a lower bolt hole penetrating the lower flange portion is formed in the lower flange portion. The opening area of the lower bolt hole on the lower surface of the lower flange portion is larger than the opening area of the lower bolt hole on the upper surface of the lower flange portion.

[0007] In the wall member according to the present invention, the lower bolt hole is formed in a frustum of a cone shape.

Effects of the Invention

[0008] According to the present invention, it is possible to shorten the working time when connecting a lower wall member below an existing upper wall member.

Brief Description of the Drawings

[0009]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Figure 8

Best Mode for Carrying Out the Invention

[0010] Hereinafter, embodiments of the present invention will be described with reference to the drawings. The present disclosure is not limited to the following embodiments, and various modifications can be made without departing from the gist of the present disclosure. Further, the present disclosure includes all possible combinations of the configurations shown in the following embodiments that can be combined. In particular, the combination of components is not limited to the combinations in each embodiment, and the components described in one embodiment can be applied to another embodiment. In the following description, terms indicating directions (e.g., "upper", "lower", "right", "left", "front", "rear", etc.) are used as appropriate for ease of understanding, but these are for the purpose of explanation and do not limit the present disclosure. Also, in each figure, those with the same reference numerals are the same or corresponding ones, which is common throughout the entire specification. Note that in each drawing, the relative dimensional relationships or shapes of the respective components may be different from the actual ones.

[0011] Embodiment 1. The wall surface member according to Embodiment 1 will be described. The wall surface member according to the present embodiment is a retaining panel that forms part of a retaining structure. The retaining structure is used, for example, in a shaft for constructing the foundation of a structure, a sewer, a sump well, etc. The retaining structure is formed, for example, by stacking a plurality of retaining panels in a plurality of stages along the depth direction of the shaft in an annular structure in which a plurality of retaining panels are arranged in parallel in the circumferential direction of the shaft.

[0012] When constructing the wall surface member, a new wall surface member is connected below the existing wall surface member. In the following description, the existing wall surface member may be referred to as the upper wall surface member, and the new wall surface member may be referred to as the lower wall surface member. That is, both the upper wall surface member and the lower wall surface member in the following description are examples of the wall surface member according to the present embodiment.

[0013] FIG. 1 is a perspective view showing an example of the configuration of the wall surface member according to the present embodiment. In the present embodiment, the upper wall surface member 2 and the lower wall surface member 1 have the same configuration. Therefore, the configuration of the lower wall surface member 1 will be mainly described, and redundant descriptions of the upper wall surface member 2 will be omitted as appropriate.

[0014] As shown in FIG. 1, the lower wall surface member 1 includes a wall surface portion 10, an upper flange portion 11, a lower flange portion 12, and a pair of joint plates 13. The wall surface portion 10, the upper flange portion 11, the lower flange portion 12, and the pair of joint plates 13 are all formed of steel plates. The wall surface portion 10 is formed in a rectangular flat plate shape, for example. The upper flange portion 11 is formed along the upper end edge of the wall surface portion 10. The lower flange portion 12 is formed along the lower end edge of the wall surface portion 10. The upper flange portion 11 and the lower flange portion 12 face each other. One joint plate 13 is formed along one side edge of the wall surface portion 10. The other joint plate 13 is formed along the other side edge of the wall surface portion 10. The pair of joint plates 13 face each other.

[0015] The lower wall surface member 1 is formed in a concave shape having an opening surface on one side by the wall surface portion 10, the upper flange portion 11, the lower flange portion 12, and the pair of joint plates 13. The upper flange portion 11 constitutes the upper surface portion of the lower wall surface member 1. The lower flange portion 12 constitutes the lower surface portion of the lower wall surface member 1. The pair of joint plates 13 constitute the side surface portions of the lower wall surface member 1. Each of the upper flange portion 11, the lower flange portion 12, and the pair of joint plates 13 is joined to the wall surface portion 10 by welding.

[0016] A plurality of upper bolt holes 11a are formed in the upper flange portion 11. A plurality of lower bolt holes 12a are formed in the lower flange portion 12. The upper bolt holes 11a and the lower bolt holes 12a are used when connecting wall surface members arranged in parallel in the vertical direction. In the present embodiment, the upper bolt holes 11a and the lower bolt holes 12a are through holes having a circular cross section.

[0017] Each of the pair of joint plates 13 has a plurality of bolt holes 13a formed therein. The plurality of bolt holes 13a are used when connecting wall surface members arranged in parallel in the left - right direction.

[0018] Similarly, the upper wall surface member 2 includes a wall surface portion 20, an upper flange portion 21, a lower flange portion 22, and a pair of joint plates 23. A plurality of upper bolt holes 21a are formed in the upper flange portion 21. A plurality of lower bolt holes 22a are formed in the lower flange portion 22. Each of the pair of joint plates 23 has a plurality of bolt holes 23a formed therein.

[0019] For example, the lower flange portion 22 of the upper wall surface member 2 and the upper flange portion 11 of the lower wall surface member 1 are abutted against each other so that the positions of the lower bolt holes 22a and the upper bolt holes 11a coincide. In this state, a bolt is passed through the lower bolt hole 22a of the lower flange portion 22 and the upper bolt hole 11a of the upper flange portion 11, and a nut is tightened against the bolt, whereby the upper wall surface member 2 and the lower wall surface member 1 are connected.

[0020] Note that the means for connecting the upper wall surface member 2 and the lower wall surface member 1 is not limited to bolts and nuts, and may be a connector such as a clip, for example. Also, the number of the illustrated upper bolt holes 11a and lower bolt holes 12a is an example and is not limited thereto.

[0021] Figure 2 is a perspective view showing another example of the configuration of the wall surface member according to the present embodiment. As shown in Figure 2, the lower wall surface member 1 has a shape - retaining member 8 provided between the upper flange portion 11 and the lower flange portion 12. The shape - retaining member 8 is provided to maintain the shape of the lower wall surface member 1 during manufacturing, transportation, and construction. The shape - retaining member 8 is formed in a plate shape by a steel plate or the like. The shape - retaining member 8 may be formed in a rod shape by a reinforcing bar or the like. The shape and the number of installed shape - retaining members 8 are determined in consideration of, for example, the size and shape of the lower wall surface member 1. Similarly, the upper wall surface member 2 also has a shape - retaining member 8.

[0022] FIG. 3 is a cross-sectional view showing still another example of the configuration of the wall surface member according to the present embodiment. The lower wall surface member 1 and the upper wall surface member 2 are not limited to the configurations shown in FIGS. 1 and 2. The lower wall surface member 1 and the upper wall surface member 2 may be constituted by corrugated steel plates as shown in FIGS. 3(A) and 3(B).

[0023] In the lower wall surface member 1 shown in FIG. 3(A), the wall surface portion 10 is formed by a corrugated steel plate having a square wave-shaped cross section. In the lower wall surface member 1 shown in FIG. 3(B), the wall surface portion 10 is formed by a corrugated steel plate having a sine curve-shaped cross section. In both FIGS. 3(A) and 3(B), the lower wall surface member 1 has an upper flange portion 11 formed along the upper edge, a lower flange portion 12 formed along the lower edge, and a pair of joint plates 13 formed along the side edges. The upper flange portion 11 is formed by bending the upper end portion of the corrugated steel plate. The lower flange portion 12 is formed by bending the lower end portion of the corrugated steel plate. The joint plate 13 is formed by a steel plate welded to the side edge of the corrugated steel plate. The same applies to the upper wall surface member 2.

[0024] Also, although not shown, the lower wall surface member 1 and the upper wall surface member 2 may be formed using a steel material having an H-shaped cross section or a steel material having a groove-shaped cross section, or may be formed by combining these steel materials. Further, the lower wall surface member 1 and the upper wall surface member 2 may be formed using steel materials having other shapes. In short, the configurations of the lower wall surface member 1 and the upper wall surface member 2 described above are merely examples, and any form may be used as long as it is the configuration of the wall surface member used as a soil retaining panel or the like. Also, the lower wall surface member 1 and the upper wall surface member 2 are not limited to the same configuration and may have different configurations from each other. For example, the lower wall surface member 1 may have the configuration having the flat wall surface portion 10 shown in FIG. 1, and the upper wall surface member 2 may have the configuration having the wall surface portion 20 made of a corrugated steel plate shown in FIG. 3, or vice versa.

[0025] Figure 4 is a cross-sectional view showing the configuration of the wall member according to the present embodiment. As shown in Figure 4, the lower wall member 1 has an upper flange portion 11 and a lower flange portion 12. A plurality of upper bolt holes 11a are formed in the upper flange portion 11. Each of the upper bolt holes 11a penetrates the upper flange portion 11 along the thickness direction of the upper flange portion 11. The diameter of the upper bolt hole 11a is constant between the upper surface 11b and the lower surface 11c of the upper flange portion 11. That is, the cross-sectional area of the upper bolt hole 11a is constant between the upper surface 11b and the lower surface 11c. The opening area of the upper bolt hole 11a on the upper surface 11b is equal to the opening area of the upper bolt hole 11a on the lower surface 11c.

[0026] A plurality of lower bolt holes 12a are formed in the lower flange portion 12. Each of the lower bolt holes 12a penetrates the lower flange portion 12 along the thickness direction of the lower flange portion 12. The diameter of the lower bolt hole 12a increases from the upper surface 12b to the lower surface 12c of the lower flange portion 12. That is, the cross-sectional area of the lower bolt hole 12a increases from the upper surface 12b to the lower surface 12c. The opening area of the lower bolt hole 12a on the lower surface 12c is larger than the opening area of the lower bolt hole 12a on the upper surface 12b. The lower bolt hole 12a is formed in a frustum of a cone shape. Thereby, the inner wall surface of the lower bolt hole 12a is formed in a conical surface shape. Thus, among the upper bolt holes 11a of the upper flange portion 11 and the lower bolt holes 12a of the lower flange portion 12, at least the lower bolt holes 12a of the lower flange portion 12 are formed in a frustum of a cone shape.

[0027] In the present embodiment, all of the plurality of lower bolt holes 12a of the lower flange portion 12 are formed in a frustum of a cone shape, but only some of the plurality of lower bolt holes 12a of the lower flange portion 12 may be formed in a frustum of a cone shape. That is, the diameter of some of the lower bolt holes 12a may be constant between the upper surface 12b and the lower surface 12c.

[0028] In addition, in the present embodiment, the lower bolt holes 12a are formed in a circular shape on both the upper surface 12b side and the lower surface 12c side. However, the lower bolt holes 12a on the lower surface 12c side may be formed in a shape other than a circle. For example, the lower bolt holes 12a on the lower surface 12c side may be formed in an oval shape having a major axis in a direction perpendicular to the wall surface portion 10. In this case, the minor axis of the lower bolt holes 12a on the lower surface 12c side is the same as or greater than the diameter of the lower bolt holes 12a on the upper surface 12b side.

[0029] The upper wall surface member 2 has the same configuration as the lower wall surface member 1. That is, lower bolt holes 22a are formed in the lower flange portion 22 of the upper wall surface member 2. The opening area of the lower bolt holes 22a on the lower surface 22c of the lower flange portion 22 is larger than the opening area of the lower bolt holes 22a on the upper surface 22b of the lower flange portion 22. The lower bolt holes 22a are formed in a frustum of a cone shape.

[0030] Figs. 5 to 8 are diagrams showing the flow of the construction method of the wall surface member according to the present embodiment. In the state shown in Fig. 5, a plurality of stages of upper wall surface members 2 are already installed along the inner wall of the shaft. As shown in Fig. 5, first, the lower wall surface member 1 is lowered into the shaft using a lifting device (not shown), a wire 31, and a hanging jig 30.

[0031] The hanging jig 30 has an overall J shape. The hanging jig 30 has a hook portion 30a formed in a hook shape. The hook portion 30a is inserted into the upper bolt hole 11a of the lower wall surface member 1 from the lower surface 11c side. The tip of the hook portion 30a protrudes upward from the upper surface 11b. In the present embodiment, since the position of the upper bolt hole 11a is different from the centroid position of the lower wall surface member 1, the lower wall surface member 1 is inclined so that the height on the wall surface portion 10 side is lower. As the lifting device, a heavy machine such as an excavator is used.

[0032] In Fig. 5, only one set of wires 31 and hanging fixtures 30 are shown. However, usually, since the lower wall surface member 1 is suspended at two or more points, two or more sets of wires 31 and hanging fixtures 30 are used.

[0033] Next, as shown in Fig. 6, the lower wall surface member 1 is moved below the upper wall surface member 2, and the tip of the hook portion 30a is inserted into the lower bolt hole 22a of the upper wall surface member from the lower surface 22c side. The opening area of the lower bolt hole 22a on the lower surface 22c is larger than the opening area of the lower bolt hole 22a on the upper surface 22b. Therefore, the tip of the hook portion 30a can be easily inserted into the lower bolt hole 22a in a short time.

[0034] In Fig. 5, the tip of the hook portion 30a extends straight up, but the tip of the hook portion 30a may also be inclined like the lower wall surface member 1. Even in this case, since the opening area of the lower bolt hole 22a on the lower surface 22c is large, the tip of the hook portion 30a can be easily inserted into the lower bolt hole 22a in a short time.

[0035] Next, as shown in Fig. 7, the upper flange portion 11 of the lower wall surface member 1 and the lower flange portion 22 of the upper wall surface member 2 are made to face each other, and the upper flange portion 11 and the lower flange portion 22 are butted against each other. This step is performed by gradually lifting the lower wall surface member 1 upward by a lifting device while the operator corrects the inclination of the lower wall surface member 1.

[0036] The tip of the hook portion 30a is guided by the inner wall surface of the lower bolt hole 22a and protrudes upward from the upper surface 22b of the lower flange portion 22. Since the inner wall surface of the lower bolt hole 22a is formed in a conical surface shape, the tip of the hook portion 30a is smoothly guided. By passing the hook portion 30a through both the upper bolt hole 11a of the lower wall surface member 1 and the lower bolt hole 22a of the upper wall surface member 2, the positions of the upper bolt hole 11a and the lower bolt hole 22a are aligned. Thereby, the lower wall surface member 1 is positioned with respect to the upper wall surface member 2.

[0037] Thereafter, as shown in FIG. 8, the lower wall surface member 1 and the upper wall surface member 2 are connected to each other using bolts 40 and nuts 41. The diameters of the bolts 40 and nuts 41 are selected based on the diameter of the lower bolt hole 22a on the upper surface 22b of the upper wall surface member 2. As described above, the means for connecting the upper wall surface member 2 and the lower wall surface member 1 is not limited to bolts 40 and nuts 41, and may be a connector such as a clip, for example. Through the above steps, the wall surface member is constructed.

[0038] As described above, the wall surface member according to the present embodiment, for example, the upper wall surface member 2, includes a wall surface portion 20, an upper flange portion 21, and a lower flange portion 22. The upper flange portion 21 is formed along the upper end edge of the wall surface portion 20. The lower flange portion 22 is formed along the lower end edge of the wall surface portion 20. An upper bolt hole 21a penetrating the upper flange portion 21 is formed in the upper flange portion 21. A lower bolt hole 22a penetrating the lower flange portion 22 is formed in the lower flange portion 22. The opening area of the lower bolt hole 22a on the lower surface 22c of the lower flange portion 22 is larger than the opening area of the lower bolt hole 22a on the upper surface 22b of the lower flange portion 22.

[0039] According to this configuration, when connecting the lower wall surface member 1 below the existing upper wall surface member 2, the tip of the hook portion 30a inserted into the upper bolt hole 11a of the lower wall surface member 1 can be inserted into the lower bolt hole 22a of the upper wall surface member 2 in a short time. Therefore, the working time for connecting the lower wall surface member 1 below the existing upper wall surface member 2 can be shortened.

[0040] On the other hand, the opening area of the lower bolt hole 22a on the upper surface 22b is smaller than the opening area of the lower bolt hole 22a on the lower surface 22c. For this reason, when connecting the upper wall surface member 2 and the lower wall surface member 1, it is not necessary to use bolts 40 and nuts 41 with a large diameter according to the diameter of the lower bolt hole 22a on the lower surface 22c. Therefore, it is possible to prevent a decrease in workability when connecting the upper wall surface member 2 and the lower wall surface member 1.

[0041] In the upper wall surface member 2 according to this embodiment, the lower bolt hole 22a is formed in a frustum of a cone shape. According to this configuration, the lower bolt hole 22a can be easily formed. Further, according to this configuration, the tip of the hook portion 30a can be smoothly guided by the inner wall surface of the lower bolt hole 22a.

[0042] In this embodiment, the lower bolt holes 12a and 22a of each wall surface member are formed in a frustum of a cone shape, but the upper bolt holes 11a and 21a of each wall surface member may also be formed in a similar frustum of a cone shape. By doing so, it becomes unnecessary to be conscious of the top and bottom of each wall surface member during the manufacture of the wall surface member and during the construction of the wall surface member.

Explanation of Reference Numerals

[0043] 1 Lower wall surface member, 2 Upper wall surface member, 8 Shape holding member, 10 Wall surface portion, 11 Upper flange portion, 11a Upper bolt hole, 11b Upper surface, 11c Lower surface, 12 Lower flange portion, 12a Lower bolt hole, 12b Upper surface, 12c Lower surface, 13 Joint plate, 13a Bolt hole, 20 Wall surface portion, 21 Upper flange portion, 21a Upper bolt hole, 22 Lower flange portion, 22a Lower bolt hole, 22b Upper surface, 22c Lower surface, 23 Joint plate, 23a Bolt hole, 30 Hanging jig, 30a Hook portion, 31 Wire, 40 Bolt, 41 Nut.

Claims

1. a wall surface portion, an upper flange portion formed along the upper edge of the wall surface portion, a lower flange portion formed along the lower edge of the wall surface portion, and comprising wherein an upper bolt hole penetrating the upper flange portion is formed in the upper flange portion, a lower bolt hole penetrating the lower flange portion is formed in the lower flange portion, and a wall surface member in which an opening area of the lower bolt hole on the lower surface of the lower flange portion is larger than an opening area of the lower bolt hole on the upper surface of the lower flange portion.

2. The wall surface member according to claim 1, wherein the lower bolt hole is formed in a frustum of a cone shape.

Images