Wall construction method and wall

Abstract

The present invention provides a wall construction method and a wall that are excellent in workability. In the present invention, a seismic wall is constructed by: a step for fixing a box-shaped base portion 11 made of steel onto a foundation 2; a step for providing panel portions 12 made of steel and having a height taller than the base portion 11 on both sides in a wall thickness direction a of the seismic wall; a step for connecting the panel portions 12 on both sides in the wall thickness direction a of the seismic wall using connecting members 16; and a step for filling concrete between the panel portions 12 on both sides in the wall thickness direction a of the seismic wall and inside the base portion 11.

Description

Wall construction method and wall

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

[0002] Patent Documents 1 to 3 describe walls in which concrete is filled inside steel panels. The wall in Patent Document 1 has a pair of steel panels arranged in the wall thickness direction between a pair of steel pipe columns, and concrete is filled between these panels. In the walls in Patent Documents 2 and 3, the panels on both sides in the wall thickness direction are connected by a partition wall.

[0003] Japanese Patent Laid-Open No. 7-54425 Japanese Patent Laid-Open No. 2022-131243 Japanese Patent Laid-Open No. 2022-131245

[0004] The walls of this type can be made large due to their excellent structural performance. However, constructing a large-scale wall poses construction challenges, such as the need to erect very large panels on a foundation and fix their lower ends to the foundation, and there has been no established method for constructing this type of wall.

[0005] The present invention has been made in view of the above problems, and has an object to provide a wall construction method and a wall that are easy to work with.

[0006] A first invention for solving the above-mentioned problems is a method for constructing a wall, comprising the steps of: fixing a box-shaped base made of steel onto a foundation; providing panel sections made of steel and taller than the base on both sides of the wall thickness direction of the wall; and connecting the panel sections on both sides of the wall thickness direction of the wall with connecting members; and the wall is constructed by filling concrete between the panel sections on both sides of the wall thickness direction of the wall and inside the base.

[0007] In this invention, when constructing a wall by filling steel panels with concrete, a small, box-shaped base is first fixed to the foundation, and then panels on both sides of the wall thickness are placed on top of it. By first fixing the small, easy-to-handle base to the foundation in this way, even a large wall can be easily erected on the foundation. Furthermore, in large walls, the lateral pressure exerted on the panels during concrete pouring increases. However, in this invention, the panels are connected to each other with ties, which can resist the lateral pressure during concrete pouring, preventing deformation of the panels and maintaining their shape.

[0008] The base has a side plate, and a plurality of the bases and the panel portions are arranged adjacent to each other in the extension direction of the wall body, and the side plates of the base adjacent to each other in the extension direction of the wall body, the panel bodies of the panel portions adjacent to each other in the extension direction of the wall body, and the side plates of the base and the panel bodies of the panel portions are preferably joined by welding from the outside. By arranging a plurality of the bases and panel portions side by side in the extension direction of the wall body, the individual bases and panel portions can be made smaller and construction can be facilitated. Furthermore, joining of adjacent bases and panel portions in the extension direction of the wall body, and joining of the base and panel portions can be easily performed by welding from the outside.

[0009] The base preferably has a bottom plate, and is fixed to the foundation by inserting anchor bolts protruding upward from the foundation into holes in the bottom plate and tightening nuts onto the portions of the anchor bolts protruding from the bottom plate. This makes it easy to fix the base of the wall body to the foundation.

[0010] The panel portion preferably has reinforcing members along the four sides of the rectangular panel body on the inner surface of the panel body. The panel portion also preferably has studs protruding inward. The reinforcing members reinforce the panel body and maintain its shape. The reinforcing members also function as protective materials to prevent damage to the peripheral edges of the panel body. The studs also enhance the integrity of the panel portion with the concrete inside, improving the structural performance of the wall.

[0011] The second invention is a wall structure built on a foundation, comprising: a box-shaped base made of steel and fixed to the foundation; panel sections made of steel and provided on the base on both sides of the wall thickness direction of the wall, the panel sections being taller than the base; connecting members connecting the panel sections on both sides of the wall thickness direction of the wall; and concrete filled between the panel sections on both sides of the wall thickness direction and inside the base. The second invention is a wall structure built by the construction method of the first invention.

[0012] The present invention can provide a wall construction method and a wall that are easy to work with.

[0013] 1 is a diagram showing a shear wall 1. 2 is a diagram showing a foundation 2. 3 is a diagram showing a base 11 of the shear wall 1. 4 is a diagram showing a panel portion 12 of the shear wall 1. 5 is a diagram showing a connecting member 16. 6 is a diagram showing welded portions 14 and 15. 7 is an example of joining a plurality of panel portions 12 in advance.

[0014] Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings.

[0015] 1 is a diagram showing a shear wall 1 constructed by a construction method according to an embodiment of the present invention. The shear wall 1 is a wall body erected on a foundation 2.

[0016] The foundation 2 is a member made of reinforced concrete, and reinforcing bars (not shown) and anchor bolts 21 (see FIG. 2), which will be described later, are embedded inside the foundation 2.

[0017] The earthquake-resistant wall 1 has a base 11 fixed to the top surface of the foundation 2 and a panel portion 12 provided on the base 11, the height of the panel portion 12 being greater than the height of the base 11. The panel portions 12 are provided on both sides of the earthquake-resistant wall 1 in the wall thickness direction a, and concrete Con is filled between the panel portions 12 and inside the base 11.

[0018] The base 11 is a box-shaped member made of steel, and the panel 12 is a plate-shaped member also made of steel. A plurality of bases 11 and panel 12 are arranged adjacent to each other in the extension direction b of the earthquake-resistant wall 1. The length of the base 11 in the extension direction b is greater than the length of the panel 12 in the extension direction b. Details of the base 11 and the panel 12 will be described later.

[0019] (2. Method of Constructing the Earthquake-Resistant Wall 1) When constructing the earthquake-resistant wall 1, first, a base 2 of the earthquake-resistant wall 1 is formed as shown in FIG.

[0020] As described above, the foundation 2 is a reinforced concrete member, and reinforcing bars (not shown) and anchor bolts 21 are embedded inside the foundation 2. The upper ends of the anchor bolts 21 protrude upward from the upper surface of the foundation 2. A plurality of anchor bolts 21 are arranged at intervals in the wall thickness direction a and extension direction b of the earthquake-resistant wall 1.

[0021] After the foundation 2 is formed, the base 11 is fixed to the upper surface of the foundation 2 as shown in FIG.

[0022] The base 11 has side plates 111 and a bottom plate 112 on both sides of the wall thickness direction a of the earthquake-resistant wall 1, and the side plates 111 on both sides of the wall thickness direction a of the earthquake-resistant wall 1 are connected to each other by a tie plate 113 which is a connecting plate.

[0023] The side plates 111 and the bottom plate 112 are strip-shaped plate materials made of steel. The bottom plate 112 is arranged along the extension direction b of the shear wall 1 with its plate surface oriented horizontally. The side plates 111 are fixed to the outer edges of the top surface of the bottom plate 112 and are arranged along the extension direction b of the shear wall 1 with their plate surface oriented vertically. The side plates 111 and the bottom plate 112 are arranged in an L-shape in a cross section of the shear wall 1 in the wall thickness direction a. At the upper end of the side plate 111, an angle bar 114 extending in the extension direction of the shear wall 1 is attached to the inner surface of the side plate 111. Although not specifically shown, a similar angle bar is also attached vertically to the inner surface of the side plate 111 at the end of the side plate 111 in the extension direction of the shear wall 1. Note that "outside (outer side, outer surface)" refers to the exterior side of the earthquake-resistant wall 1 in the wall thickness direction a, and "inside (inner side, inner surface)" refers to the interior side of the earthquake-resistant wall 1 in the wall thickness direction a.

[0024] The bottom plate 112 has a plurality of holes (not shown) at planar positions corresponding to the anchor bolts 21, and the upper ends of the anchor bolts 21 protruding from the foundation 2 are passed through the respective holes. The base 11 is fixed to the upper surface of the foundation 2 by tightening nuts 22 onto the protruding portions of the anchor bolts 21 protruding from the bottom plate 112.

[0025] The tie plates 113 are strip-shaped plate materials, and are made of steel plates or H-section materials. The tie plates 113 are arranged along the wall thickness direction a of the earthquake-resistant wall 1 with their plate surfaces oriented vertically, and both ends are fixed to the side plates 111 on both sides of the wall thickness direction a of the earthquake-resistant wall 1. Multiple tie plates 113 are arranged at intervals in the extension direction b of the earthquake-resistant wall 1.

[0026] In this embodiment, a plurality of bases 11 are arranged in the extension direction b of the earthquake-resistant wall 1, and after each base 11 is erected and fixed on the foundation 2, the side plates 111 of the bases 11 adjacent to each other in the extension direction b are welded together from the outside. In the drawing, reference numeral 13 denotes the welded portion between the side plates 111 of the bases 11.

[0027] After the base 11 is placed on the foundation 2 in the manner described above, the panel 12 of the earthquake-resistant wall 1 is erected from above, and the panel 12 is placed on the base 11 as shown in FIG.

[0028] The panel section 12 has angle members 122 provided along the four sides of a rectangular panel body 121. The angle members 122 are provided on the inner surface of the panel body 121 and function as reinforcing members for maintaining the shape of the panel body 121. The angle members 122 also function as protective members for preventing damage to the peripheral edges of the panel body 121.

[0029] Ribs 123 and studs 124 are also provided on the inner surface of the panel body 121. The ribs 123 are rectangular plate-shaped members that protrude inward from the panel body 121 and are provided continuously in the vertical direction from the upper end to the lower end of the panel body 121. The studs 124 are provided to protrude inward from the panel body 121 and improve the unity between the panel portion 12 and the concrete Con of the shear wall 1. A plurality of ribs 123 are arranged at intervals in the extension direction b of the shear wall 1. A plurality of studs 124 are arranged at intervals in the extension direction b of the shear wall 1 and in the vertical direction.

[0030] The panel portion 12 is fixed to the base portion 11 by fastening the angle iron 122 at the bottom of the panel portion 12 to the angle iron 114 of the base portion 11 using fasteners such as bolts (not shown). In this embodiment, a plurality of panel portions 12 are arranged side by side in the extension direction b of the earthquake-resistant wall 1, and the angle irons 122 at the sides of adjacent panel portions 12 in the extension direction b are joined together using fasteners such as bolts (not shown). The panel portions 12 on both sides in the wall thickness direction a are erected separately and fixed to the base portion 11.

[0031] After the panel sections 12 are thus installed on the base section 11, the panel sections 12 on both sides in the wall thickness direction a are connected by connecting members 16, as shown in Figure 5. The connecting members 16 are strip-shaped plate materials made of steel plates. The connecting members 16 are arranged along the wall thickness direction a of the earthquake-resistant wall 1 with their plate surfaces oriented vertically, and both ends of the connecting members 16 are fixed with bolts or the like to the ribs 123 of the panel sections 12 on both sides in the wall thickness direction a.

[0032] 6, the panel bodies 121 of adjacent panel sections 12 are welded and joined from the outside using vertical welds 14, and the panel bodies 121 of each panel section 12 are welded and joined to the side plates 111 of the base section 11 using horizontal welds 15. The welding operations for the welds 14, 15 may be performed in either order.

[0033] After these welding steps are completed, concrete Con is poured between the panel sections 12 in the wall thickness direction a of the earthquake-resistant wall 1 and inside the base section 11, thereby constructing the earthquake-resistant wall 1 shown in Figure 1. If necessary, the steps from Figure 4 onwards can be repeated to install upper panel sections 12 on top of the panel sections 12 on both sides in the wall thickness direction a, and concrete Con can be filled between the upper panel sections 12, thereby raising the earthquake-resistant wall 1 vertically upward.

[0034] As described above, in this embodiment, when constructing a shear wall 1 in which concrete Con is filled between steel panel sections 12, the small, box-shaped base 11 is first fixed to the foundation 2, and then the panel sections 12 on both sides in the wall thickness direction a are provided on top of it. In this way, by first fixing the small, easy-to-handle base 11 to the foundation 2, even a large-scale shear wall 1 can be easily erected on the foundation 2. Furthermore, in a large-scale shear wall 1, the lateral pressure applied to the panel sections 12 when the concrete Con is poured becomes large. However, in this embodiment, the panel sections 12 are connected to each other by the ties 16, and the ties 16 can resist the lateral pressure when the concrete Con is poured, preventing deformation of the panel sections 12 and maintaining their shape.

[0035] Furthermore, by arranging multiple bases 11 and panel sections 12 of the earthquake-resistant wall 1 side by side in the extension direction b of the earthquake-resistant wall 1, the individual bases 11 and panel sections 12 can be made smaller, making construction easier. Furthermore, joining adjacent bases 11 and panel sections 12 in the extension direction b of the earthquake-resistant wall 1, as well as joining adjacent bases 11 and panel sections 12 together, can be easily performed by welding from the outside.

[0036] In addition, in this embodiment, the anchor bolt 21 protruding upward from the foundation 2 is inserted into a hole in the bottom plate 112 provided on the base 11, and the nut 22 is tightened to the protruding portion of the anchor bolt 21 from the bottom plate 112, thereby making it possible to easily fix the base 11 onto the foundation 2.

[0037] In this embodiment, the angle irons 122 reinforce the panel body 121 and maintain its shape. The angle irons 122 also function as protective materials to prevent damage to the peripheral edges of the panel body 121. In this embodiment, the studs 124 enhance the unity between the panel portion 12 and the concrete Con, improving the structural performance of the earthquake-resistant wall 1.

[0038] However, the present invention is not limited to the above-described embodiment. For example, when installing the panel sections 12, it is desirable to weld the panel bodies 121 of the multiple panel sections 12 together at the welds 14 in advance in a work yard or the like, as shown in Figure 7, and then erect the multiple panel sections 12 as a single unit. This reduces the labor required for constructing the shear wall 1. Welding at the welds 14 can also be performed with the panel bodies 121 laid horizontally. Alternatively, the panel sections 12 on both sides of the wall thickness direction a may be connected by connecting members 16, and then erected as a single unit on the base 11.

[0039] In this embodiment, the concrete Con of the earthquake-resistant wall 1 is poured inside the base 11 and the panel 12 after the base 11 and the panel 12 are installed, but it is also possible to fill the internal space of the base 11 with concrete Con before installing the panel 12, and then fill the internal space between the panel 12 on both sides in the wall thickness direction with concrete Con after installing the panel 12. Also, the base 11 may be installed with a gap of about 100 mm from the top surface of the foundation 2, and then the gap may be filled with a filler such as mortar. This allows for high installation precision.

[0040] In this embodiment, the integrated base 11 having the side plates 111 and bottom plate 112 on both sides in the wall thickness direction a is erected and fixed on the foundation 2, but the side plates 111 and bottom plate 112 on both sides in the wall thickness direction a may be erected and fixed separately on the foundation 2, and then the side plates 111 on both sides in the wall thickness direction a may be connected by the tie plate 113. Alternatively, a unit in which the side plate 111, bottom plate 112, and part of the length of the tie plate 113 on one side in the wall thickness direction are integrated, and a unit in which the side plate 111, bottom plate 112, and the remaining length of the tie plate 113 on the other side in the wall thickness direction are integrated, may be erected and fixed separately on the foundation 2, and then the tie plates 113 of both units may be connected together using bolts and nuts.

[0041] Alternatively, the panel portion 12 of the shear wall 1 can be raised a predetermined height (for example, about 1000 mm) above the slab of the upper floor, and the panel portion 12 can be erected on top of this as a base, and the shear wall 1 can be constructed on the slab of the upper floor using the same construction method as described above. Although the shear wall 1 is constructed in this embodiment, the construction method of this embodiment can also be applied when constructing other types of wall. The shear wall 1 may also be constructed under a temporary roof supported by columns, in which case columns can be provided between the panel portions 12 on both sides in the wall thickness direction a and embedded within the shear wall 1.

[0042] Furthermore, the shapes of the base 11 and the panel 12 are not limited to those described above, and it is sufficient that the height of the panel 12 is greater than the height of the base 11. For example, the studs 124 are provided as needed, and in some cases may be omitted. In addition, in this embodiment, the side plates 111 and the bottom plate 112 of the base 11 are arranged in an L-shape, but the side plates 111 may be erected on the bottom plate 112 in a T-shape. In addition, in this embodiment, the bases 11 and the panel 12 adjacent to each other in the extension direction of the shear wall 1 are joined by welding, but they may also be joined by bolts or the like instead of welding. The same applies to the joining of the base 11 and the panel 12.

[0043] While the preferred embodiments of the present invention have been described above with reference to the accompanying drawings, the present invention is not limited to these examples. It is clear that those skilled in the art can conceive of various modifications or alterations within the scope of the technical ideas disclosed herein, and it is understood that these modifications also fall within the technical scope of the present invention.

[0044] 1: Earthquake-resistant wall 2: Foundation 11: Base 12: Panel 13, 14, 15: Welded section 16: Connecting material 21: Anchor bolt 22: Nut 111: Side plate 112: Bottom plate 113: Tie plate 114, 122: Angle iron 121: Panel body 123: Rib 124: Stud

Claims

1. A method for constructing a wall, comprising the steps of: fixing a box-shaped base made of steel onto a foundation; providing panel sections made of steel on both sides of the wall in the wall thickness direction, the panel sections being taller than the base; and connecting the panel sections on both sides of the wall in the wall thickness direction with connecting members, wherein the wall is constructed by filling concrete between the panel sections on both sides of the wall in the wall thickness direction and inside the base.

2. A method for constructing a wall as described in claim 1, characterized in that the base has side plates, and a plurality of the bases and panel portions are arranged adjacent to each other in the extension direction of the wall, and the side plates of the base adjacent to each other in the extension direction of the wall, the panel bodies of the panel portions adjacent to each other in the extension direction of the wall, and the side plates of the base and the panel bodies of the panel portions are joined by welding from the outside.

3. A method for constructing a wall according to claim 1, characterized in that the base has a bottom plate, and the base is fixed onto the foundation by inserting anchor bolts protruding upward from the foundation into holes in the bottom plate and tightening nuts onto the portions of the anchor bolts protruding from the bottom plate.

4. A method for constructing a wall according to claim 1, wherein the panel portion has reinforcing members on the inner surface of the rectangular panel body along the four sides of the panel body.

5. The method of claim 1, wherein said panel sections have studs projecting inwardly therefrom.

6. A wall body to be erected on a foundation, comprising: a box-shaped base made of steel and fixed to the foundation; panel sections made of steel and provided on both sides of the base in the wall thickness direction of the wall body, the panel sections being taller than the base; connecting members connecting the panel sections on both sides of the wall thickness direction of the wall body; and concrete filled between the panel sections on both sides of the wall in the wall thickness direction and inside the base.

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