Method for constructing wall member

Abstract

To provide a method for constructing a wall member, which can reduce the burden on a worker when connecting a lower wall member to the bottom of an existing upper wall member.SOLUTION: In a method for constructing a wall member, a lower wall member is positioned below a lower flange portion of an upper wall member. A wire, one end of which is connected to a lifting device and the other end of which is connected to a barb, is passed through a lower bolt hole formed in the lower flange portion of the upper wall member and an upper bolt hole formed in the upper flange portion of the lower wall member. With the barb hooked onto the upper flange portion, the lower wall member is lifted by the lifting device. The upper flange portion and the lower flange portion are butted against each other to position the lower wall member below the upper wall member. The lower wall member and the upper wall member are connected to each other.SELECTED DRAWING: Figure 8

Description

Technical Field

[0001] The present invention relates to a method for constructing wall members.

Background Art

[0002] Conventionally, as disclosed in, for example, Patent Document 1, there is known a method for constructing wall members 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 method for constructing wall members, with a part of the suspension jig inserted through the through holes and the first wall member lifted, the first wall member is disposed below the already installed second wall member, and a part of the suspension jig inserted through the through holes of the first wall member is inserted through the through holes 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 positions of the through holes of the first wall member are 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 holes of the first wall member through the through holes of the second wall member can be a burden on the operator.

[0005] The present invention solves the above problems, and an object thereof is to provide a method for constructing wall members that can reduce the burden on the operator when connecting a lower wall member below an existing upper wall member.

Means for Solving the Problems

[0006] The construction method of the wall member according to the present invention is a construction method of connecting a lower wall member below an existing upper wall member. The lower wall member is arranged below the lower flange portion of the upper wall member. A wire having one end connected to a lifting device and the other end connected to a return member is passed through a lower bolt hole formed in the lower flange portion of the upper wall member and an upper bolt hole formed in the upper flange portion of the lower wall member. With the return member hooked on the upper flange portion, the lower wall member is lifted by the lifting device, the upper flange portion and the lower flange portion are butted against each other to position the lower wall member below the upper wall member, and the lower wall member and the upper wall member are connected to each other.

[0007] In the construction method of the wall member according to the present invention, when butting the upper flange portion and the lower flange portion against each other, after a part of the upper flange portion comes into contact with the lower flange portion, the lower wall member is further lifted by the lifting device.

Effect of the Invention

[0008] According to the present invention, the burden on the operator when connecting the lower wall member below the existing upper wall member can be reduced.

Brief Description of the Drawings

[0009]

Figure 1

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Embodiments 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 combinations of configurations that can be combined among the configurations shown in the following embodiments. 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. Also, in the following description, terms indicating directions (for example, "up", "down", "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 each component may be different from the actual ones.

[0011] Embodiment 1. The construction method of the wall member according to Embodiment 1 will be described. The construction method of the wall member according to this embodiment is to connect a new wall member below an existing wall member. The construction method of the wall member according to this embodiment is applied, for example, when constructing an earth retaining structure in a shaft.

[0012] First, the configuration of each wall surface member will be described. 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. The upper wall surface member and the lower wall surface member are earth retaining panels that form part of the earth retaining structure. The earth retaining structure is used, for example, in a shaft for constructing the foundation of a structure, a sewer, a sump, etc. The earth retaining structure is formed, for example, by stacking a plurality of earth retaining panels in a plurality of stages along the depth direction of the shaft, with an annular structure in which the plurality of earth retaining panels are arranged in parallel in the circumferential direction of the shaft.

[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, for example, in a rectangular flat plate shape. The upper flange portion 11 is formed along the upper edge of the wall surface portion 10. The lower flange portion 12 is formed along the lower 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 a wall surface portion 10, an upper flange portion 11, a lower flange portion 12, and a pair of joint plates 13. The upper flange portion 11 constitutes the upper surface of the lower wall surface member 1. The lower flange portion 12 constitutes the lower surface of the lower wall surface member 1. The pair of joint plates 13 constitutes the side surfaces 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. That is, female threads are not formed on the inner peripheral surfaces of the upper bolt holes 11a and the lower bolt holes 12a respectively. However, female threads may be formed on the inner peripheral surfaces of the upper bolt holes 11a and the lower bolt holes 12a respectively.

[0017] A plurality of bolt holes 13a are formed in each of the pair of joint plates 13. The plurality of bolt holes 13a are used to connect wall surface members arranged in parallel in the left-right direction and form, for example, an annular structure.

[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. A plurality of bolt holes 23a are formed in each of the pair of joint plates 23.

[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 connecting tool 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] FIG. 2 is a perspective view showing another example of the configuration of the wall surface member according to the present embodiment. As shown in FIG. 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 retain the shape of the lower wall surface member 1 during manufacturing, transportation, and construction. Also, the shape retaining member 8 may be provided as a reinforcing member. When the shape retaining member 8 is provided as a reinforcing member, its shape and the like are determined computationally. 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 installations of the shape retaining member 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 the 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 (B).

[0023] In the lower wall surface member 1 shown in Fig. 3(A), the wall surface portion 10 is formed of 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 of a corrugated steel plate having a sine-curve-shaped cross section. In both Fig. 3(A) and (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 of 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 in the drawings, 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 examples, and any form may be used as long as it is the configuration of a wall surface member used as a 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 a configuration with a flat wall surface portion 10 shown in Fig. 1, and the upper wall surface member 2 may have a configuration with a wall surface portion 20 made of a corrugated steel plate shown in Fig. 3, or vice versa.

[0025] Figs. 4 to 9 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. 4, a plurality of upper wall surface members 2 are already installed along the inner wall of the shaft.

[0026] First, as shown in FIGS. 4 and 5, using a lifting device (not shown), a wire 31, and a hanging jig 30, the lower wall surface member 1 is lowered into the shaft and temporarily placed on the excavation bottom surface 100. As a result, the lower wall surface member 1 is disposed below the lower flange portion 22 of the upper wall surface member 2. It is desirable that the lower wall surface member 1 be disposed as close as possible directly below the upper wall surface member 2. As the hanging jig 30, for example, a general J-shaped hanging jig is used. As the lifting device, a heavy machine such as an excavator is used.

[0027] Next, as shown in FIG. 6, a wire 32 is passed through the lower bolt hole 22a of the upper wall surface member 2 and the upper bolt hole 11a of the lower wall surface member 1. One end side of the wire 32 is connected to the lifting device. A return member 33 is connected to the other end side of the wire 32. The wire 32 is passed through the lower bolt hole 22a of the upper wall surface member 2 and the upper bolt hole 11a of the lower wall surface member 1 in this order from one end side to the other end side of the wire 32.

[0028] In the present embodiment, the return member 33 is detachably connected to the other end side of the wire 32. For this reason, the return member 33 is connected to the other end of the wire 32 after the wire 32 is passed through the lower bolt hole 22a and the upper bolt hole 11a. The return member 33 is configured so as not to be able to pass through the upper bolt hole 11a and to be hooked on the upper flange portion 11 of the lower wall surface member 1. The return member 33 is formed, for example, in a disk shape or a rectangular flat plate shape. The planar size of the return member 33 is larger than the size of the upper bolt hole 11a. The pulling force by the lifting device is transmitted to the lower wall surface member 1 via the wire 32 and the return member 33. Thereby, the lower wall surface member 1 can be lifted using the lifting device, the wire 32, and the return member 33. In FIG. 6, only one set of the wire 32 and the return member 33 is shown, but usually, since the lower wall surface member 1 is suspended at two or more points, two or more sets of the wire 32 and the return member 33 are used.

[0029] Next, as shown in FIG. 7, with the return member 33 hooked on the upper flange portion 11, the lower wall surface member 1 is lifted by a lifting device via the wire 32 and the return member 33. Since the wire 32 passes through the lower bolt hole 22a and the upper bolt hole 11a, the lower wall surface member 1 is disposed directly below the upper wall surface member 2. However, 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 with respect to the upper wall surface member 2.

[0030] When the lower wall surface member 1 is gradually lifted by the lifting device, a part of the upper flange portion 11 of the lower wall surface member 1 comes into contact with the lower flange portion 22 of the upper wall surface member 2. Thereafter, the lower wall surface member 1 is further lifted by the pulling force of the lifting device. As a result, the inclination of the lower wall surface member 1 with respect to the upper wall surface member 2 gradually decreases.

[0031] Finally, as shown in FIG. 8, 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 face each other, and the upper flange portion 11 and the lower flange portion 22 are abutted against each other. Since the wire 32 passes through the upper bolt hole 11a and the lower bolt hole 22a, the positions of the upper bolt hole 11a and the lower bolt hole 22a are aligned. As a result, the lower wall surface member 1 is positioned below the upper wall surface member 2.

[0032] Thereafter, as shown in FIG. 9, the lower wall surface member 1 and the upper wall surface member 2 are connected to each other using bolts 40 and nuts 41. 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. Through the above steps, the wall surface member is constructed.

[0033] As described above, the construction method of the wall member according to the present embodiment is to connect the lower wall member 1 below the existing upper wall member 2. The construction method of the wall member according to the present embodiment has the following first to fifth steps. The first step is a step of arranging the lower wall member 1 below the lower flange portion 22 of the upper wall member 2. The second step is a step of passing the wire 32 through the lower bolt hole 22a formed in the lower flange portion 22 of the upper wall member 2 and the upper bolt hole 11a formed in the upper flange portion 11 of the lower wall member 1. One end side of the wire 32 is connected to a lifting device. A return member 33 is connected to the other end side of the wire 32. The third step is a step of lifting the lower wall member 1 by a lifting device with the return member 33 hooked on the upper flange portion 11. The fourth step is a step of positioning the lower wall member 1 below the upper wall member 2 by butting the upper flange portion 11 and the lower flange portion 22 against each other. The fifth step is a step of connecting the lower wall member 1 and the upper wall member 2 to each other.

[0034] In this construction method of the wall member, the wire 32 is passed through the lower bolt hole 22a and the upper bolt hole 11a. Therefore, by lifting the lower wall member 1 via the wire 32 and the return member 33 by a lifting device, the lower wall member 1 can be arranged directly below the upper wall member 2. Therefore, since the positioning of the lower wall member 1 with respect to the upper wall member 2 becomes easy, the burden on the operator when connecting the lower wall member 1 below the upper wall member 2 can be reduced. For example, even when the weight of the wall member is heavy, by lifting the lower wall member 1 with the wire 32, the upper bolt hole 11a of the lower wall member 1 naturally approaches the lower bolt hole 22a of the upper wall member 2, so that the burden on the operator can be reduced.

[0035] In the construction method of the wall member according to the present embodiment, when butting the upper flange portion 11 and the lower flange portion 22 against each other, after a part of the upper flange portion 11 comes into contact with the lower flange portion 22, the lower wall member 1 is further lifted by a lifting device.

[0036] According to the construction method of this wall surface member, the upper flange portion 11 and the lower flange portion 22 can be easily butted together by the pulling force of the lifting device. Therefore, the burden on the operator when connecting the lower wall surface member 1 below the upper wall surface member 2 can be further reduced.

Description of reference numerals

[0037] 1 Lower wall surface member, 2 Upper wall surface member, 8 Shape retaining member, 10 Wall surface portion, 11 Upper flange portion, 11a Upper bolt hole, 12 Lower flange portion, 12a Lower bolt hole, 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, 23 Joint plate, 23a Bolt hole, 30 Hanging jig, 31 Wire, 32 Wire, 33 Return member, 40 Bolt, 41 Nut, 100 Excavated bottom surface.

Claims

1. A construction method of wall surface members for connecting a lower wall surface member below an existing upper wall surface member, The lower wall surface member is disposed below the lower flange portion of the upper wall surface member, A wire having one end connected to a lifting device and the other end connected to a return member is passed through a lower bolt hole formed in the lower flange portion of the upper wall surface member and an upper bolt hole formed in the upper flange portion of the lower wall surface member, With the return member hooked on the upper flange portion, the lower wall surface member is lifted by the lifting device, The upper flange portion and the lower flange portion are abutted against each other to position the lower wall surface member below the upper wall surface member, A construction method of wall surface members for connecting the lower wall surface member and the upper wall surface member to each other.

2. When the upper flange portion and the lower flange portion are abutted against each other, after a part of the upper flange portion comes into contact with the lower flange portion, the lower wall surface member is further lifted by the lifting device. The construction method of wall surface members according to Claim 1.

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