Wall installation scaffold and wall installation method

Abstract

To provide a wall installation scaffold and a wall installation method capable of performing work from the exterior of a new wall when installing the new wall adjacent to an existing wall.SOLUTION: A retaining wall installation scaffold 20 is used for installing a new retaining wall 11B adjacent to an already-installed existing retaining wall 11A when installing a plurality of retaining walls 11 at a high place 12 by aligning them along an edge 13 in a wall width direction. The retaining wall installation scaffold 20 comprises: a support section 21 supported on an upper end side of the existing retaining wall 11A and movable in the wall width direction while supported; and a scaffold section 22 connected to the support section 21 via a connecting section 23, placed at a position outside the new retaining wall 11B, and provided with a scaffold board 27 for operators to stand on at a position below the support section 21.SELECTED DRAWING: Figure 3

Description

[Technical Field]

[0001] The present invention relates to a wall installation scaffold used when installing multiple walls in a line along an edge at a high altitude, and a wall installation method when installing walls using the wall installation scaffold. [Background technology]

[0002] At high places such as cliffs or highways, walls such as retaining walls are often installed along the edges. When installing walls at high places, it is common to set up work scaffolding in advance on the outside of the walls. Such scaffolding is erected, for example, from the ground to the high place. The work of erecting such scaffolding is considered to be very large-scale.

[0003] Patent Document 1 discloses a technology in which a gondola for maintenance work is provided on the outside of an already installed wall (hereinafter referred to as the existing wall), and the gondola is used while supported by the existing wall. This gondola has a boarding section that is provided on the outside of the existing wall and on which a worker boards, and a support section that is supported on the upper end of the existing wall. The boarding section is box-shaped, with a width that is smaller than the width of the existing wall. In this case, a worker can stand on the boarding section and perform maintenance work from outside the existing wall.

[0004] Furthermore, the gondola in Patent Document 1 has a support part with multiple rollers that can roll on the outer surface of the existing wall, and these rollers roll in the width direction of the existing wall, allowing the gondola to be moved in the width direction of the wall. As a result, by using the gondola in Patent Document 1, maintenance work can be performed from the outside of each existing wall. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Registered Utility Model No. 3178200 Summary of the Invention [Problem to be solved by the invention]

[0006] Here, when installing a wall along an edge at a high place, it is conceivable to use the gondola of Patent Document 1 as a scaffold. Specifically, when installing a new wall (hereinafter referred to as a new wall) adjacent to an existing wall, it is conceivable to support the gondola of Patent Document 1 on the existing wall and use it as a scaffold. In this way, when installing the wall, it is not necessary to perform the above-mentioned scaffolding assembly work.

[0007] Furthermore, when using the gondola of Patent Document 1, after a new wall body is installed adjacent to an existing wall body, the gondola can be moved from the existing wall body to the new wall body (in other words, the new existing wall body) and supported by the new existing wall body. Therefore, it becomes possible to use the gondola as a scaffold every time a new wall body is installed.

[0008] When installing a new wall adjacent to an existing wall, the new wall must be adjusted to a predetermined installation position. This adjustment is performed, for example, using a crowbar from the outside of the new wall. However, in the gondola of Patent Document 1, the boarding section is simply placed on the outside of the existing wall, so it is considered impossible to perform the adjustment from the outside of the new wall.

[0009] The present invention has been made in consideration of the above circumstances, and its main object is to provide a wall installation scaffold and a wall installation method that allow work to be carried out from the outside of a new wall when installing a new wall adjacent to an existing wall. [Means for solving the problem]

[0010] In order to solve the above problems, the wall installation scaffolding of the present invention is A wall installation scaffolding used to install a new wall adjacent to an existing wall that has already been installed when installing multiple wall bodies in a line in the wall width direction along an edge at a high point, a support portion supported on an upper end side of the existing wall body and movable in the wall width direction in the supported state; The scaffolding section is connected to the support section via a connecting section and is positioned on the outside of the newly constructed wall body, and is provided with a scaffolding board on which workers can stand at a position lower than the support section. [Effects of the Invention]

[0011] The wall installation scaffolding of the present invention is used when installing a new wall adjacent to an existing wall. The wall installation scaffolding includes a support section that is supported on the upper end side of the existing wall, and a scaffolding section that is positioned on the outside of the new wall. The scaffolding section is provided with a scaffolding board on which workers stand. This allows workers to stand on the scaffolding board and work from the outside of the new wall when installing the new wall.

[0012] After the new wall is installed, it becomes the new existing wall. Therefore, the support part is moved in the wall width direction and supported on the upper end side of the new existing wall. In this case, the scaffolding part is positioned on the outside of the new wall that will be installed adjacent to the new existing wall. This makes it possible to stand on the scaffolding board and work from the outside of the new wall when installing the new wall. In this way, when installing new walls one after another, it is possible to work from the outside of the new wall each time. [Brief explanation of the drawings]

[0013] [Figure 1] This is a perspective view showing how retaining walls are installed in a line along the edge of a high location using retaining wall installation scaffolding. [Figure 2] This is a side view showing the state in which retaining wall installation scaffolding has been installed on an existing retaining wall. [Figure 3]This is an oblique view showing the state in which retaining wall installation scaffolding has been installed on an existing retaining wall, and also shows the installation of a new retaining wall adjacent to the existing retaining wall. [Figure 4] FIG. 1 is a perspective view showing a scaffold for installing a retaining wall. [Figure 5] (a) is a side view showing the scaffolding connection process, and (b) is a perspective view showing the worker waiting process. [Figure 6] FIG. 10(a) is a perspective view showing a wall body installation process, and FIG. 10(b) is a perspective view showing a wall body moving process. [Figure 7] This is a plan view to explain another wall installation method, where (a) shows the state in which walls have been installed in a row along the edge of the expressway, and (b) to (d) show the process of installing the first wall. DETAILED DESCRIPTION OF THE INVENTION

[0014] The present invention relates to a scaffold for installing a wall, ...

[0015] As shown in Figures 1 and 2, at an elevated location 12 such as a cliff or a highway, a plurality of retaining walls 11 are installed side by side in the wall width direction along the edge 13. Each retaining wall 11 has an L-shaped cross section and includes a base portion 11a that rests on the ground 15 at the elevated location 12, and a wall portion 11b that rises upward from the base portion 11a. The wall portion 11b is located outside the base portion 11a, and its outer surface is located on the same plane as the elevated side surface 17 that extends downward from the edge 13 of the elevated location 12. Each retaining wall 11 has the same wall width L. Each retaining wall 11 corresponds to a "wall body."

[0016] A retaining wall installation scaffolding 20 is used when installing the retaining walls 11 in a line along the edge 13 at the high place 12. The configuration of the retaining wall installation scaffolding 20 will be described below.

[0017] As shown in Figure 3, retaining wall installation scaffolding 20 is used when installing a new retaining wall 11 (hereinafter referred to as new retaining wall 11B) adjacent to an existing retaining wall 11 (hereinafter referred to as existing retaining wall 11A). Retaining wall installation scaffolding 20 has a support part 21 that is supported on the upper end side of the existing retaining wall 11A, a scaffold part 22 that is positioned outside the new retaining wall 11B, and a connecting part 23 that connects support part 21 and scaffold part 22. Note that retaining wall installation scaffolding 20 corresponds to "wall installation scaffolding".

[0018] The retaining wall installation scaffolding 20 is installed with the support part 21 supported on the upper end side of the existing retaining wall 11A and the scaffolding part 22 positioned outside the new retaining wall 11B. The configuration of the retaining wall installation scaffolding 20 will be described below based on this installed state.

[0019] As shown in Figures 2 to 4, the scaffolding section 22 extends in the wall width direction of the retaining wall 11 (hereinafter simply referred to as the wall width direction), and is disposed on a predetermined side in the wall width direction of the support section 21. In this case, the predetermined side is the side where the new retaining wall 11B is adjacent to the existing retaining wall 11A. The scaffolding section 22 has a scaffolding board 27 provided at its bottom, and a fence section 28 erected on the peripheral edge of the scaffolding board 27. The scaffolding board 27 is disposed below the support section 21, and a plurality of scaffolding boards 27 (specifically, two scaffolding boards) are disposed side by side in the wall width direction. Furthermore, each scaffolding board 27 is located below the lower end of the existing retaining wall 11A (in other words, the installation surface on the ground 15 where the existing retaining wall 11A is to be installed).

[0020] The fence section 28 has a plurality of posts 31 and a plurality of cross members 32 connected to each post 31. The posts 31 and cross members 32 are made of, for example, metal pipes or rods. The cross members 32 are arranged at intervals in the vertical direction. When a worker moves from the ground 15 onto the scaffolding board 27, he moves between the cross members 32 adjacent to each other in the vertical direction. In addition, the scaffolding board 27 is fixed to the lower end of the fence section 28.

[0021] The length L1 of the scaffolding section 22 in the wall width direction is greater than the wall width L of the retaining wall 11. In this case, the scaffolding section 22 has an extension portion 34 that extends in the wall width direction on the opposite side from the existing retaining wall 11A side beyond the installation area where the new retaining wall 11B will be installed. After the new retaining wall 11B has been installed, when the worker moves from the scaffolding board 27 onto the ground 15, he moves onto the ground 15 from the extension portion 34 (see FIG. 6(a)).

[0022] The connecting portion 23 is adjacent to the scaffolding portion 22 in the wall width direction and is connected to the scaffolding portion 22. In this case, the scaffolding portion 22 and the connecting portion 23 form a main body portion 25 extending in the wall width direction. The connecting portion 23 is arranged on the outside of the existing retaining wall 11A. The length L2 of the connecting portion 23 in the wall width direction is smaller than the wall width L of the retaining wall 11. Furthermore, the length L1 of the scaffolding portion 22 in the wall width direction is 1.5 times or more the length L2 of the connecting portion 23 in the wall width direction, and in this embodiment, it is approximately twice as long.

[0023] The connecting section 23 has a frame body section 36 in the shape of a rectangular parallelepiped frame extending in the vertical direction, and a plurality of scaffolding boards 37, 38 provided inside the frame body section 36. The frame body section 36 extends higher than the scaffolding section 22 and has a plurality of posts 41 erected at its four corners and a plurality of cross members 42 connecting adjacent posts 41. The posts 41 and cross members 42 are made of, for example, metal pipes or rods. In addition, a ladder section 43 is provided on the side of the frame body section 36 opposite the side facing the scaffolding section 22.

[0024] Of the scaffolding boards 37, 38, the scaffolding board 37 is arranged at the bottom of the frame body portion 36, and the scaffolding board 38 is arranged higher than the scaffolding board 37. The scaffolding board 37 is arranged alongside each scaffolding board 27 of the scaffolding section 22 in the wall width direction. This makes it possible to move from the scaffolding board 27 of the scaffolding section 22 to the scaffolding board 37 of the connecting section 23. When moving from the scaffolding board 37 to the scaffolding board 38, the ladder section 43 is used. When moving, a hatch (not shown) provided on the scaffolding board 38 is opened and the movement is made.

[0025] Next, we will explain the support part 21. The support part 21 is attached to the upper part of the connecting part 23 (more specifically, the frame part 36). The support part 21 extends from the connecting part 23 in the wall thickness direction of the existing retaining wall 11A, and is supported on the upper end side of the existing retaining wall 11A.

[0026] The support part 21 has a plurality of rollers 51-53 that can roll on the outer surface of the existing retaining wall 11A in the wall width direction, and a plurality of roller support parts 54-56 that respectively support each of the rollers 51-53. While supported by the existing retaining wall 11A, the support part 21 is movable in the wall width direction as each of the rollers 51-53 rolls on the outer surface of the existing retaining wall 11A. The movement of the support part 21 makes it possible to move the retaining wall installation scaffolding 20 in the wall width direction.

[0027] The rollers 51-53 include a first roller 51 that rolls on the upper end surface of the existing retaining wall 11A, a second roller 52 that rolls on the inner surface of the existing retaining wall 11A (specifically, the inner surface of wall portion 11b), and a third roller 53 that rolls on the outer surface of the existing retaining wall 11A (specifically, the outer surface of wall portion 11b). Each roller support portion 54-56 includes a roller support portion 54 that supports the first roller 51, a roller support portion 55 that supports the second roller 52, and a roller support portion 56 that supports the third roller 53. Each roller support portion 54-56 is formed from a pipe or a rod. A plurality of rollers 51-53 and roller support portions 54-56 (specifically, two rollers) are arranged at intervals in the wall width direction.

[0028] Each roller support portion 54, 55 is attached to the upper part of the connecting portion 23 via a support frame 58. The support frame 58 is formed by assembling a plurality of pipe materials and constitutes part of the support portion 21. The support frame 58 has a horizontal extension portion 58a that extends from the upper part of the connecting portion 23, passing above the existing retaining wall 11A and away from the connecting portion 23, and a vertical extension portion 58b that extends downward from the horizontal extension portion 58a and is positioned inside the existing retaining wall 11A.

[0029] The roller support portion 54 is attached to the horizontal extension portion 58a using a clamp 61. In this case, by loosening the clamp 61, the attachment position of the roller support portion 54 can be adjusted in the vertical direction, thereby adjusting the position of the first roller 51 in the vertical direction (in other words, the height direction of the existing retaining wall 11A). In addition, the roller support portion 55 is attached to the vertical extension portion 58b using a clamp 62. In this case, by loosening the clamp 62, the attachment position of the roller support portion 55 can be adjusted in the wall thickness direction of the existing retaining wall 11A (hereinafter simply referred to as the wall thickness direction), thereby adjusting the position of the second roller 52 in the wall thickness direction. In addition, the roller support portion 56 is attached to the upper part of the connecting portion 23 using a clamp 63. In this case, by loosening the clamp 63, the attachment position of the roller support portion 56 can be adjusted in the wall thickness direction, thereby adjusting the position of the third roller 53 in the wall thickness direction.

[0030] A roller 65 is provided at the lower end of the scaffolding section 22, which abuts against the high-place side surface 17 at the high place 12 and can roll on the high-place side surface 17 in the wall width direction. The rollers 65 are respectively arranged at both ends of the scaffolding section 22 in the wall width direction. Each roller 65 is attached to the scaffolding section 22 via a rod-shaped roller support part 66. Each roller 65 corresponds to an "abutment part."

[0031] Additionally, a roller 68 is provided at the lower end of the connecting portion 23, which abuts against the high-place side surface 17 at the high place 12 and is capable of rolling along the high-place side surface 17 in the wall width direction. The roller 68 is disposed at the end of the connecting portion 23 opposite the scaffolding portion 22 side. The roller 68 is attached to the connecting portion 23 via a rod-shaped roller support portion 69. The roller 65 of the scaffolding portion 22 and the roller 68 of the connecting portion roll along the high-place side surface 17 in the wall width direction when the retaining wall installation scaffolding 20 is moved in the wall width direction.

[0032] The scaffolding section 22 is provided with a mounting section 71 that extends toward the ground 15 at the elevated position 12 and is placed on the ground 15. The mounting section 71 extends from the scaffolding section 22 on the same side as the support section 21 in the wall thickness direction. The mounting section 71 is also attached to the end of the scaffolding section 22 on the opposite side to the connecting section 23 side (support section 21 side) in the wall width direction. In this case, the mounting section 71 is arranged on the opposite side to the existing retaining wall 11A across the installation location where the new retaining wall 11B will be installed.

[0033] The mounting section 71 has a mounting body 72 attached to the scaffolding section 22 and extending from the scaffolding section 22 onto the ground 15, and a rotating body 73 provided on the mounting body 72. The mounting body 72 is formed in a frame shape that extends in a horizontal direction (in other words, the wall thickness direction) that intersects with the length direction (in other words, the wall width direction) of the scaffolding section 22 and also extends in the up and down direction. The mounting body 72 is formed by assembling a plurality of vertical members 75 and a plurality of horizontal members 76 into a rectangular frame shape. The vertical members 75 and horizontal members 76 are formed from pipe material or rod material.

[0034] The rotating bodies 73 are made of casters and are attached in pairs to the lower end of the mounting body 72. Each rotating body 73 is placed (grounded) on the ground 15 and is able to roll on the ground 15 in the wall width direction. Each rotating body 73 is also provided with a stopper function to prevent it from rolling. The rotating body 73 corresponds to the "grounded portion."

[0035] Next, an installation method will be described for installing retaining walls 11 in a line along edge 13 at high elevation 12 using the above-mentioned retaining wall installation scaffolding 20. Here, the explanation will focus on the process for installing new retaining wall 11B adjacent to existing retaining wall 11A that has already been installed.

[0036] As shown in Figures 5(a) and (b), a retaining wall installation scaffolding 20 has been installed in advance on the existing retaining wall 11A. The retaining wall installation scaffolding 20 is installed with its support part 21 supported on the upper end side of the existing retaining wall 11A and its scaffold part 22 positioned outside the new retaining wall 11B. In this installed state, the placing part 71 is placed on the ground 15 at the elevated position 12. Furthermore, the rotating body 73 of the placing part 71 is prevented from rolling by a stopper.

[0037] With the retaining wall installation scaffolding 20 in the above-described installed state, first, as shown in FIG. 5(a), a scaffolding connection process is performed in which the scaffolding section 22 is connected to a fixing device 81 fixed on the ground 15 via a connecting member 82. The fixing device 81 is made of, for example, a hoop reinforcement, and is fixed to the ground 15 in advance. For example, the fixing device 81 is fixed in a state in which it is partially buried in foundation concrete (not shown) on the ground 15. The connecting member 82 is made of, for example, a linear member such as a chain or wire. One end of the connecting member 82 is connected to the scaffolding section 22 in advance. More specifically, one end of the connecting member 82 is connected via a connecting device 85 to the end of the scaffolding section 22 opposite the connecting section 23 side (in other words, the support section 21 side) in the wall width direction.

[0038] In the connection process, the other end of the connection member 82 is fixed to the fixing device 81, and tension is applied to the connection member 82 by operating the operating unit 83. As a result, the scaffolding unit 22 is connected to the fixing device 82 via the connection member 82. Also, in the connection process, the connection is made by the connection member 82 so that the connection member 82 is positioned on the opposite side of the installation location of the new retaining wall 11B from the existing retaining wall 11A. Note that for ease of explanation, the fixing device 81 and the connection member 82 are not shown in Figures 5(b), 6(a) and (b).

[0039] Next, as shown in Fig. 5(b), a worker movement process is carried out in which the worker T moves from the ground 15 of the elevated position 12 onto the scaffolding plank 27 of the scaffolding section 22. In this process, the worker T moves onto the scaffolding plank 27 through between the horizontal members 32 adjacent to each other above and below in the fence section 28 of the scaffolding section 22. After moving onto the scaffolding plank 27, the worker T waits on the scaffolding plank 27 (worker waiting process).

[0040] Next, as shown in Figure 6(a), a wall installation process is carried out in which new retaining wall 11B is installed adjacent to existing retaining wall 11A while worker T waits on scaffolding board 27. In this process, new retaining wall 11B is installed while being lowered while suspended by a crane (see also Figure 3, although worker T is not shown in Figure 3). In addition, new retaining wall 11B is placed between existing retaining wall 11A and placement section 71.

[0041] When installing the new retaining wall 11B, a worker T waiting on the scaffolding board 27 works from the outside of the new retaining wall 11B. For example, a position adjustment operation is performed to adjust the installation position of the new retaining wall 11B so that the position of the new retaining wall 11B in the wall thickness direction is the same as the position of the existing retaining wall 11A in the wall thickness direction. Such a position adjustment operation is performed by inserting a crowbar into the gap between the bottom surface of the new retaining wall 11B and the ground 15, for example.

[0042] The new retaining wall 11B installed in the wall installation step becomes a new existing wall. Hereinafter, the same reference numeral will be used and the wall will be referred to as the "new existing retaining wall 11B."

[0043] Next, a worker evacuation step is performed in which the worker T evacuates (moves) from the scaffolding plank 27 onto the ground 15. In this step, the worker T evacuates from the extension portion 34 of the scaffolding section 22 onto the ground 15.

[0044] Next, a disconnection process is carried out to disconnect the scaffolding section 22 from the fixing device 81. In this process, the other end of the connecting member 82 is removed from the fixing device 81 to release the connection. Thereafter, the fixing device 81 is removed from the ground 15. In addition, the stopper of the rotating body 73 of the mounting section 71 is released to allow the rotating body 73 to roll.

[0045] 6(b), a scaffolding movement process is carried out in which the support part 21 is moved in the wall width direction to support the support part 21 on the upper end side of the new existing retaining wall 11B, and the scaffolding part 22 is positioned outside the new retaining wall 11 (hereinafter referred to as the new retaining wall 11C) that will be installed adjacent to the new existing retaining wall 11B. In this process, worker T holds the cross member 76 of the mounting body 72 and pushes the mounting body 72 in the wall width direction, thereby moving the support part 21 and therefore the retaining wall installation scaffolding 20 in the wall width direction.

[0046] By carrying out the scaffolding moving process, the retaining wall installation scaffolding 20 is set in a state where it is installed on the new existing retaining wall 11B. Therefore, the retaining wall installation scaffolding 20 can be used to install the new retaining wall 11C adjacent to the new existing retaining wall 11B. In this case, the new retaining wall 11C is installed by carrying out each of the processes from the scaffolding connecting process to the wall installation process described above.

[0047] Thus, according to the installation method of this embodiment, by repeatedly installing a new retaining wall (scaffolding connection process to wall installation process) and moving the retaining wall installation scaffolding 20 (movement process), retaining walls 11 can be installed in a row at a high altitude 12.

[0048] According to the configuration of this embodiment described above in detail, the following excellent effects can be obtained.

[0049] The retaining wall installation scaffolding 20 includes a support section 21 that is supported on the upper end side of the existing retaining wall 11A, and a scaffolding section 22 that is positioned outside the new retaining wall 11B that will be installed adjacent to the existing retaining wall 11A. The scaffolding section 22 is provided with a scaffolding board 27 on which workers stand. This allows workers to stand on the scaffolding board 27 and work from the outside of the new retaining wall 11B when installing the new retaining wall 11B.

[0050] After the new retaining wall 11B is installed, the new retaining wall 11B becomes the new existing retaining wall 11B. Because the support section 21 is movable in the wall width direction, by moving the support section 21 in the wall width direction, the support section 21 can be supported on the upper end side of the new existing retaining wall 11B, and the scaffolding section 22 can be positioned on the outside of the new retaining wall 11C that will be installed adjacent to the new existing retaining wall 11B. This makes it possible to stand on the scaffolding boards 27 and work from the outside of the new retaining wall 11C when installing the new retaining wall 11C. In this way, by using the retaining wall installation scaffolding 20, it is possible to work from the outside of the new retaining wall each time a new retaining wall is installed.

[0051] The scaffold section 22 includes a base section 71 that extends from the scaffold section 22 onto the ground 15 at the elevated location 12 and is placed on the ground 15. In this case, the load of the scaffold section 22 can be supported on the ground 15 via the base section 71. This prevents the scaffold section 22 from bending downward when a worker stands on the scaffold plank 27 of the scaffold section 22. This allows work on the scaffold plank 27 to be performed in a stable state.

[0052] The mounting portion 71 has a rotating body 73 that can roll on the ground 15 in the wall width direction as a ground contact portion that is placed on the ground 15. This makes it possible to easily move the retaining wall installation scaffolding 20 equipped with the mounting portion 71 in the wall width direction.

[0053] The mounting body 72 of the mounting part 71 is formed in a frame shape that extends vertically. This allows the mounting body 72 to be pushed in the wall width direction when moving the retaining wall installation scaffolding 20 in the wall width direction. In addition, the mounting body 72 can be used as a safety fence when a worker moves from the ground 15 onto the scaffolding board 27.

[0054] Rollers 65 that come into contact with the high-place side surface 17 are provided at the bottom of the scaffolding section 22. In this case, the load of the scaffolding section 22 can be supported by the high-place side surface 17 via the rollers 65. This prevents the scaffolding section 22 from tilting when a worker stands on the scaffolding plank 27 of the scaffolding section 22. This allows the worker to work on the scaffolding plank 27 in a stable state.

[0055] The contact portion that contacts the high side surface 17 is a roller 65 that can roll along the high side surface 17 in the wall width direction. This makes it easier to move the retaining wall installation scaffolding 20 having the contact portion in the wall width direction.

[0056] The connecting portion 23 is adjacent to the scaffolding portion 22 in the wall width direction and is arranged on the outside of the existing retaining wall 11A. The connecting portion 23 is provided with a scaffolding board 37 that is aligned with the scaffolding board 27 of the scaffolding portion 22 in the wall width direction. In this case, the connecting portion 23 that connects the scaffolding portion 22 and the support portion 21 also serves as a scaffold, and it is possible to perform work from the outside of the existing retaining wall 11A by standing on the scaffolding board 37 of the connecting portion 23.

[0057] A scaffolding board 38 is provided at the connecting portion 23 above the scaffolding board 37. This makes it possible to perform work on the scaffolding board 38, such as when performing rigging work to install the retaining wall 11 using a crane.

[0058] A scaffolding connection process is carried out in which the scaffolding section 22 is connected to the fixtures 81 fixed on the ground 15 via the connection members 82. In this process, the connection is made using the connection members 82 so that the connection members 82 are positioned on the opposite side of the installation location where the new retaining wall 11B will be installed from the existing retaining wall 11A. After this process, a wall installation process is carried out in which the new retaining wall 11B is installed adjacent to the existing retaining wall 11A. In this case, the new retaining wall 11B is installed between the existing retaining wall 11A and the connection members 82.

[0059] Furthermore, because the scaffolding section 22 is connected to the fixing device 81 via the connecting member 82, the scaffolding section 22 can be prevented from moving away from the new retaining wall 11B when the new retaining wall 11B is being installed. This makes it possible to work in a stable state on the scaffolding board 27 when installing the new retaining wall 11B.

[0060] The position of the first roller 51 can be adjusted in the wall height direction of the existing retaining wall 11A, so the position of the first roller 51 can be set according to the wall height of the existing retaining wall 11A. In addition, the positions of the second roller 52 and the third roller 53 can be adjusted in the wall thickness direction of the existing retaining wall 11A, so the positions of the rollers 52, 53 can be set according to the wall thickness of the existing retaining wall 11A. This makes it possible to use the retaining wall installation scaffolding 20 for multiple types of retaining walls 11 with different wall heights and thicknesses.

[0061] Incidentally, if the installation surface on which the retaining wall 11 is to be installed at a high elevation 12 is inclined along the edge 13, the retaining wall 11 installed on the installation surface will be installed at an incline in the wall width direction. In this case, the retaining wall installation scaffolding 20 installed on the existing retaining wall 11A will also be installed at an incline. In this regard, in the above embodiment, the positions of the multiple first rollers 51 spaced apart in the wall width direction can be adjusted in the wall height direction, making it possible to adjust the position of each first roller 51 in the wall height direction according to the inclination of the existing retaining wall 11A. This makes it possible to install the retaining wall installation scaffolding 20 in a non-inclined state on the existing retaining wall 11A that is in an inclined state.

[0062] The present invention is not limited to the above-described embodiment, and may be implemented, for example, as follows.

[0063] (1) In the above embodiment, the mounting unit 71 has the rotating body 73 as the ground contact portion, but the ground contact portion does not necessarily have to be the rotating body 73. For example, the mounting unit 71 may have legs that are grounded on the ground 15 as the ground contact portion. In this case, the legs may be provided on the mounting body 72 so as to be movable in the vertical direction, so that the legs can be switched between a ground contact state in which they are grounded on the ground 15 and a retracted state in which they are retracted above the ground 15. With this configuration, during the scaffolding movement process, the retaining wall installation scaffolding 20 can be easily moved by switching the legs to the retracted state.

[0064] (2) In the above embodiment, the mounting body 72 is formed in a frame shape extending in the vertical direction, but this may be changed to a plate shape extending in the vertical direction. In this case, too, the retaining wall installation scaffolding 20 can be moved by pushing the mounting body 72 in the wall width direction.

[0065] (3) In the above embodiment, the scaffolding boards 37, 38 are provided at the connecting portion 23, but it is also possible to not provide these scaffolding boards 37, 38. In that case, the connecting portion 23 may be formed in a shape other than a frame shape, such as by forming it in an elongated shape.

[0066] (4) The support portion 21 may be provided with a driving unit such as a motor that rotates the rollers 51 to 53. In this case, the driving unit rotates the rollers 51 to 53, causing them to roll on the outer surface of the existing retaining wall 11A, thereby making it possible to move the support portion 21 in the wall width direction. This makes it possible to easily move the support portion 21.

[0067] (5) In the above embodiment, a scaffolding connecting step was performed in which the scaffolding portion 22 of the retaining wall installation scaffolding 20 was connected to the fixture 81 on the ground 15 via the connecting member 82. However, during this scaffolding connecting step, the support portion 21 may also be connected via the connecting member 82 to a fixture (hereinafter referred to as a second fixture) that has been fixed in advance to the ground 15 or the base portion 11a of the existing retaining wall 11A. This allows the retaining wall installation scaffolding 20 to be installed in a more stable state.

[0068] Specifically, it is conceivable to connect the vertical extension portion 58b of the support frame 58 of the support portion 21 to the second fixing device via a connecting member 82. Furthermore, when the retaining wall 11 is lifted using a crane, the hook of the crane is hooked onto the lifting device attached to the retaining wall 11. Therefore, the lifting device attached to the existing retaining wall 11A may be used as the second fixing device.

[0069] (6) In the above embodiment, before the scaffolding movement process, the worker retreats from the scaffolding plank 37 onto the ground 15. However, the worker may remain on the scaffolding plank 37 without retreating. In that case, during the scaffolding movement process, another worker moves the retaining wall installation scaffolding 20 while the worker remains on the scaffolding plank 37.

[0070] (7) In some cases, walls other than the retaining wall 11, such as protective fences, are installed side by side at the high place 12. In such cases, the wall installation scaffolding of the present invention may be used.

[0071] (8) In the configuration of the above embodiment, the placing portion 71 may not be provided. In this case, it is possible to move the retaining wall installation scaffolding 20 in the wall width direction between each of the existing retaining walls 11. Therefore, it is possible to use the retaining wall installation scaffolding 20 for maintenance work on each of the existing retaining walls 11. In other words, it is possible to perform maintenance work from outside the existing retaining wall 11 by standing on the scaffolding board 27.

[0072] If the placing portion 71 is not provided, it is desirable to provide a connecting member that diagonally connects the support portion 21 and the scaffolding portion 22. In this way, it is possible to prevent the scaffolding portion 22 from bending downward.

[0073] (9) In the case of the configuration (8) above (configuration without the placement section 71), in addition to providing the scaffolding section 22 (hereinafter referred to as the first scaffolding section) on one side of the support section 21 in the wall width direction, the second scaffolding section may be provided on the other side of the support section 21 in the wall width direction. In this case, the second scaffolding section is configured symmetrically to the first scaffolding section in the wall width direction and is connected to the connecting section 23. With this configuration, it becomes possible to use the second scaffolding section in addition to the first scaffolding section for maintenance work.

[0074] (10) For example, when the first wall is to be installed, there is no existing wall at the time of installation. Therefore, when installing the first wall, the wall installation method using the wall installation scaffolding (retaining wall installation scaffolding 20) in the above embodiment cannot be used. Therefore, when installing the first wall, it is possible to adopt the <other wall installation method> described below.

[0075] <Other wall installation methods> An installation method for installing the wall body along the edge portion at the high point in the wall width direction using the wall body installation scaffolding according to any one of claims 1 to 6, As the wall installation scaffolding, a first wall installation scaffolding in which the scaffolding portion is arranged on a first side in the wall width direction relative to the support portion, and a second wall installation scaffolding in which the scaffolding portion is arranged on a second side opposite to the first side in the wall width direction relative to the support portion are prepared in advance, a first wall body temporary installation step of temporarily installing a first wall body as the wall body; a first scaffold installation process for installing the first wall installation scaffold using a lifting device such as a crane, in a state where the support section is supported on the upper end side of the temporarily installed first wall and the scaffold section is positioned outside the second wall when a second wall is to be installed adjacent to the first side of the first wall; a first moving step in which the worker moves onto the scaffolding board of the first wall body installation scaffolding after the first scaffolding installation step; a second wall body installation step of installing the second wall body after the first moving step; After the second wall body installation step, a scaffold removal step of lifting and removing the first wall body installation scaffold from the first wall body using the lifting device; After the scaffolding removal process, a second scaffolding installation process is performed in which the support portion is supported on the upper end side of the second wall body and the scaffolding portion is disposed outside the first wall body, and the second wall body installation scaffolding is installed using the lifting device. a second moving step in which the worker moves onto the scaffolding plank of the second wall body installation scaffolding after the second scaffolding installation step; a first wall body final installation step of permanently installing the first wall body after the second moving step; A wall installation method comprising:

[0076] According to the above-mentioned <Another wall installation method>, first, the first wall, which is the first wall, is temporarily installed. Then, a scaffold for installing the first wall is installed on the temporarily installed first wall, and then a second wall is installed adjacent to the first side of the first wall. At this time, the scaffolding section of the scaffolding for installing the first wall is positioned outside the second wall. Therefore, when installing the second wall, workers can work from the outside of the second wall on the scaffolding planks of the scaffolding section.

[0077] The first wall installation scaffolding is then removed, and the second wall installation scaffolding is installed on the second wall. In this case, the scaffolding portion of the second wall installation scaffolding is positioned outside the first wall. The first wall in the temporarily installed state is then permanently installed. For example, the first wall is slightly lifted using a lifting device, and the first wall is permanently installed in the specified installation position. At this time, workers can work from outside the first wall on the scaffolding boards of the second wall installation scaffolding (scaffolding portion).

[0078] As described above, according to the above <Another wall installation method>, when installing (specifically, main installation) the first wall (first wall), work can be performed from the outside of that wall.

[0079] Incidentally, when installing walls on an expressway constructed at a height, walls 91 (e.g., retaining walls) may be installed side by side along both edge portions 92, 93 of an expressway 90, as shown in Figure 7(a). In this case, a first wall installation scaffolding 95 used when installing the wall body 91 along one edge portion 92 and a second wall installation scaffolding 96 used when installing the wall body 91 along the other edge portion 93 are prepared as wall installation scaffolding.

[0080] When installing the wall body 91 along both edge portions 92, 93, the installation may be carried out in the same direction for installing the wall body 91 along one edge portion 92 and installing the wall body 91 along the other edge portion 93. In such a case, the first wall body installation scaffolding 95 may be configured so that the scaffold portion 95a is located on a first side in the wall width direction relative to the support portion 95b, and the second wall body installation scaffolding 96 may be configured so that the scaffold portion 96a is located on a second side, opposite the first side in the wall width direction, relative to the support portion 96b.

[0081] Therefore, when installing the wall 91 using the wall installation scaffolds 95, 96 configured as described above, it is possible to adopt the above-mentioned "other wall installation method." For example, when installing the wall 91 along the edge 93, first, as shown in FIG. 7(b), the first wall 91A (corresponding to the first wall) is temporarily installed, and the first wall installation scaffold 95 (on the edge 92 side) is installed on the temporarily installed wall 91A. Then, as shown in FIG. 7(c), the first wall installation scaffold 95 is used to install the wall 91B (corresponding to the second wall) adjacent to the wall 91A. At this time, the wall 91B is installed adjacent to the wall 91A in the direction opposite to the installation direction of the wall 91. Then, as shown in FIG. 7(d), the first wall installation scaffold 95 is removed from the wall 91A, and the second wall installation scaffold 96 is installed on the wall 91B. Then, the wall body 91A is finally installed using the second wall body installation scaffolding 96. This allows workers to work from outside the wall body 91A on the scaffolding planks of the second wall body installation scaffolding 96 (scaffolding section 96a) when installing (specifically, final installation) the first wall body 91A.

[0082] Furthermore, when installing wall bodies 91 along the edge portion 92, the first wall body 91 can be installed using the same procedure as described above (in this case, the relationship between the first wall body installation scaffolding 95 and the second wall body installation scaffolding 96 is reversed). [Explanation of symbols]

[0083] 11...retaining wall as wall body, 12...height, 13...edge, 15...ground, 20...retaining wall installation scaffolding as wall installation scaffolding, 21...support part, 22...scaffolding part, 23...connecting part, 27...scaffolding board, 65...roller as contact part, 71...mounting part, 72...mounting body, 73...rotating body as ground contact part.

Claims

1. A wall installation scaffolding used to install a new wall adjacent to an existing wall that has already been installed when installing multiple wall bodies in a line in the wall width direction along an edge at a high point, a support portion supported on an upper end side of the existing wall body and movable in the wall width direction in the supported state; A scaffold for installing a wall, comprising: a scaffold section that is connected to the support section via a connecting section and is positioned on the outside of the newly constructed wall, and has a scaffold section with a scaffolding board on which workers stand at a position lower than the support section.

2. The wall installation scaffolding according to claim 1 , further comprising a placing portion extending from the scaffolding portion onto the ground inward of the edge portion and placed on the ground.

3. the mounting portion has a grounding portion that is grounded on the ground, The wall installation scaffolding according to claim 2, wherein the ground contact portion is a rotating body that can roll on the ground in the wall width direction, or is provided so as to be able to retract upward from the ground.

4. The mounting portion extends from the scaffolding portion onto the ground and has a mounting body on which the ground contact portion is provided, The wall installation scaffolding according to claim 3 , wherein the mounting body is formed in a frame shape or a plate shape extending in the vertical direction.

5. 5. A wall installation scaffolding according to claim 1, wherein a contact portion is provided at the lower part of the scaffolding portion to contact the high-place side surface extending downward from the edge portion at the high place.

6. The connecting portion is adjacent to the scaffolding portion in the wall width direction and is arranged on the outside of the existing wall body, The wall installation scaffolding according to any one of claims 1 to 4, wherein the connecting portion is provided with a scaffolding board on which the worker stands, aligned in the wall width direction with the scaffolding board of the scaffolding portion.

7. 5. An installation method for installing the wall body at the high location along the edge portion in the wall width direction using the wall body installation scaffolding according to claim 1, a worker waiting process in which the wall installation scaffolding is installed in advance with the support section supported on the upper end side of the existing wall and the scaffolding section positioned outside the new wall, and a worker waits on the scaffolding board of the scaffolding section with the wall installation scaffolding installed; a wall installation process in which the worker installs the new wall while waiting on the scaffolding board; the newly installed wall body is a new existing wall body, and a scaffolding movement process is performed in which the support part is moved in the wall width direction so that the support part supports the upper end side of the new existing wall body, and the scaffolding part is disposed on the outside of a new newly installed wall body adjacent to the new existing wall body; A wall installation method comprising:

8. a scaffolding connecting step of connecting the scaffolding portion to a fixture fixed on the ground on the inside of the edge portion via a connecting member in the installed state of the wall body installation scaffolding; In the scaffolding connection step, the connection is performed using the connection member so that the connection member is located on the opposite side of the existing wall body across the installation location where the new wall body is to be installed, The wall installation method according to claim 7 , wherein the wall installation step is performed after the scaffolding connection step.

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