Root wrapping structure and root wrapping construction method

Abstract

To provide a root wrapping structure and a construction method of root wrapping that can reduce labor required for construction.SOLUTION: There is provided a configuration including: a base material 20 fixed to a side 1a of a column (steel column 1); a panel 40 fixed to the base material 20 and covering the side 1a of the column (steel column 1) all around so that a gap is formed with the side 1a of the column (steel column 1) and whose side constitutes a finished surface of a root wrapping of the column (steel column 1); a bottom (plate 30) fixed to the column so as to close the gap between the side 1a of the column (steel column 1) and the panel 40 from below; and concrete 4 filled into a space A demarcated by the side 1a of the column (steel column 1), the panel 30 and the bottom (plate 30).SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a root wrapping structure and a root wrapping construction method. [Background technology]

[0002] Conventionally, a method of wrapping a pillar to protect it is known, as described in Patent Document 1, for example.

[0003] Patent Document 1 describes a column base structure that protects a steel pipe column by wrapping the column base around the base.

[0004] The base of the column base structure is made of reinforced concrete. Construction of this type of base could not begin until the slab below the column was formed. In other words, after the slab concrete was poured to form the slab, the reinforcement for the base and formwork had to be installed on the slab, and then the concrete for the base had to be poured and the base construction completed.

[0005] However, when wrapping the roots in the manner described above, the work requires the involvement of workers with various types of work, and is time-consuming. Therefore, a root-wrapping structure and a root-wrapping method that can reduce the amount of work required for the work are desired. [Prior art documents] [Patent documents]

[0006] [Patent Document 1] Japanese Patent Application Laid-Open No. 2003-105859 Summary of the Invention [Problem to be solved by the invention]

[0007] The present invention was made in consideration of the above-mentioned situation, and the problem it aims to solve is to provide a root wrapping structure and a root wrapping construction method that can reduce the effort required for construction. [Means for solving the problem]

[0008] The problem to be solved by the present invention is as described above, and the means for solving this problem will now be described.

[0009] That is, in claim 1, there is a base material fixed to the side surface of a column, a panel fixed to the base material, covering the side surface of the column over the entire periphery so as to form a gap between the side surface of the column and the panel, and the side surface constitutes the finished surface of the column root wrapping, a bottom part fixed to the column so as to close the gap between the side surface of the column and the panel from below, and a space partitioned by the side surface of the column, the panel and the bottom part. Inside To, The concrete outside the space, including the concrete of the slab below the root wrapping, is cut off. and concrete to be filled.

[0010] In claim 2, The base material is formed in a substantially C-shape in plan view and cross section, and the substantially C-shaped opening is provided between the panel and the side surface of the column. It is something.

[0011] In claim 3, The panel is made of metal It is something.

[0012] In claim 4, The base material is fixed to the pillar by welding, the pillar has a plurality of side surfaces, and one of the plurality of side surfaces has two base materials provided on it that have different protruding dimensions from the one side surface in a plan view. It is something.

[0013] In claim 5, the panel is composed of a plurality of divided members divided horizontally, and connecting portions are formed at the ends of the divided members to connect to other divided members, and the plurality of divided members are fixed integrally to the base material with each connecting portion overlapping each other.

[0014] In claim 6, the connecting portion forms a recess that is recessed toward the column side on the finished surface.

[0015] In claim 7, a method for constructing a base wrapping to protect a column includes a base material fixing step of fixing a base material to the side of the column, a bottom fixing step of fixing a bottom part constituting the bottom surface of the base wrapping to the column, a panel fixing step of placing a panel that covers the entire side of the column on the bottom part and fixing the panel to the base material before pouring concrete for a slab below the base wrapping, and a space partitioned by the side of the column, the panel and the bottom part. Inside To, The concrete outside the space, including the concrete of the slab, is cut off, and a concrete pouring step for pouring concrete.

[0016] In claim 8, the concrete pouring step is carried out at the same time as pouring the concrete for the slab. [Effects of the Invention]

[0017] The present invention has the following effects.

[0018] The present invention In this case, the labor required for wrapping the roots can be reduced. In addition, a clearance can be created between the external concrete and the root covering in case the pillar tilts, etc. [Brief explanation of the drawings]

[0026] [Figure 1] FIG. 1 is a plan view showing a root wrapping structure and a steel column according to a first embodiment of the present invention. [Figure 2] A side view showing the root wrapping structure, steel columns and slab. [Figure 3] An enlarged cross-sectional plan view showing the root wrapping structure and steel column. [Figure 4] FIG. [Figure 5] FIG. 10 is an exploded plan view showing how the panel is attached to the base member. [Figure 6] 1 is a flowchart showing a construction method according to a first embodiment of the present invention. [Figure 7] FIG. 10 is a side view showing the state before the panel is fixed to the base material. [Figure 8]A side view showing concrete being poured into the space within the panel with the panel fixed to the base material. [Figure 9] A plan view showing a root wrapping structure and a steel column according to a second embodiment of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0027] A root wrapping structure 10 according to a first embodiment of the present invention will be described below with reference to Figures 1 to 8. In the following description, the front-rear direction, left-right direction, and up-down direction will be defined based on the arrows in the figures.

[0028] The root wrapping structure 10 is a root wrapping structure that protects the steel column 1 at the lower part of the steel column 1 (the part on the slab 2 side).

[0029] First, the steel column 1 and the slab 2 will be described below.

[0030] The steel column 1 shown in Figures 1 and 2 is a column made of steel (iron). The steel column 1 is used, for example, in steel-frame buildings. The steel column 1 is formed into a cylindrical (rectangular cylindrical) shape with a quadrangular (approximately square) outer shape in plan view. For example, a steel pipe measuring 500 mm x 500 mm can be used as the steel column 1. As shown in Figure 1, the steel column 1 has four side surfaces 1a facing forward, backward, left and right. The steel column 1 is arranged with its longitudinal direction facing up and down. A plurality of steel columns 1 are provided on a given floor of a building.

[0031] The slab 2 constitutes the floor below the steel column 1. The slab 2 is made of reinforced concrete. That is, the slab 2 is formed by pouring concrete 4 into a formwork (not shown) in which reinforcing bars 3 are arranged. The concrete 4 is poured so as to bury the lower end of the steel column 1 (see Figure 2).

[0032] Next, the root wrapping structure 10 will be described in detail with reference to FIGS. 1 to 5 and 7. FIG.

[0033] The root wrapping structure 10 protects the steel column 1 by covering the side surface 1a at the bottom of the steel column 1. The root wrapping structure 10 is positioned above the slab 2. The root wrapping structure 10 is provided on each of the multiple steel columns 1. The root wrapping structure 10 mainly comprises a base material 20, a plate 30, a panel 40, and concrete 4.

[0034] The base material 20 shown in Figures 1 to 3, 5 and 7 is fixed to the side surface 1a at the bottom of the steel column 1, and a panel 40 (described later) is fixed to it. The base material 20 is a long metal member (lip channel steel) that is roughly C-shaped in cross section. The base material 20 is placed with its longitudinal direction facing up and down.

[0035] The base materials 20 are fixed to the side surface 1a of the steel column 1 by welding. As shown in FIG. 1, the base materials 20 are arranged two by two on one side surface 1a (the side surface 1a that constitutes one side of the steel column 1 in a plan view), spaced apart from each other in the horizontal direction (front-to-back or left-to-right direction). That is, in this embodiment, a total of eight base materials 20 are provided on the steel column 1. The base materials 20 include a first base material 21 and a second base material 22.

[0036] The first base material 21 shown in Figs. 1 and 3 is used to fix the connection portions (connection portions 42a and 43a) of the panel 40 described later. One first base material 21 is provided on each of a pair of side surfaces 1a (front and rear surfaces) of the side surfaces 1a of the steel column 1. Each first base material 21 is arranged at a point-symmetrical position about the center of the steel column 1 in a plan view. More specifically, the first base material 21 is arranged on the right side of the side surface 1a facing rearward and on the left side of the side surface 1a facing forward.

[0037] The second base material 22 is used to fix the panel 40, described later, except for the connection portions (connection portions 42a and 43a). The second base material 22 is provided at the portions (eight locations) on the side surface 1a of the steel column 1 where the base material 20 is provided but where the first base material 21 is not provided. That is, one second base material 22 is provided on the left portion of the side surface 1a facing rearward and one on the right portion of the side surface 1a facing forward, and two second base materials 22 are provided on each of the side surfaces 1a facing leftward and rightward. The protruding dimension (front-to-back dimension or left-to-right dimension) of the second base material 22 from the side surface 1a is formed larger than the protruding dimension (front-to-back dimension) of the first base material 21 from the side surface 1a.

[0038] The plate 30 shown in Figures 1, 2, 5 and 7 is on which a panel 40, which will be described later, is placed. The plate 30 forms the bottom surface of the root wrapping. The plate 30 is formed in a plate shape with the plate surface facing up and down. The plate 30 is formed in a substantially quadrangular (substantially square) shape in a plan view. The plate 30 has an opening 31.

[0039] The opening 31 is a portion that opens upward and downward in the center of the plate 30 in plan view, and the opening 31 is formed in a shape (substantially square) that is generally similar to the shape of the steel column 1 in plan view.

[0040] The plate 30 is fixed to the side surface 1a of the steel column 1 by welding, with the opening 31 inserted into the steel column 1. As shown in Fig. 2, the plate 30 is provided so as to be located below the base material 20. The plate 30 is also provided so as to be located above the level of the slab 2 (so as to form a gap between the plate 30 and the upper surface of the slab 2).

[0041] The panel 40 shown in Figs. 1 to 5 covers the entire periphery of the side surface 1a of the steel column 1. The panel 40 is formed by appropriately bending a metal plate material. The panel 40 is placed on the plate 30 and fixed to the base material 20. The panel 40 is positioned so that a gap equal to the protruding dimension of the base material 20 is formed between the panel 40 and the side surface 1a of the steel column 1.

[0042] The panel 40 is formed in a generally rectangular cylindrical shape that opens at the top and bottom. The outer shape of the panel 40 in a plan view is generally the same as the outer shape (approximately square) of the plate 30 in a plan view. The panel 40 is formed by combining a right panel 40A and a left panel 40B, which are multiple members that are divided horizontally (left and right).

[0043] The right panel 40A and the left panel 40B are formed identically to each other and are arranged at positions that are point-symmetrical with respect to the center of the steel column 1 in plan view.

[0044] The right panel 40A will be described below. The right panel 40A is formed in a substantially C-shape in plan view, as shown in Fig. 4. The right panel 40A includes a first portion 41, a second portion 42, and a third portion 43.

[0045] The first portion 41 shown in Figs. 1 and 4 is a portion that covers the entirety of one side surface 1a (the side surface 1a facing to the right) of the steel column 1. The first portion 41 is arranged with the plate surface facing in the left-right direction. As shown in Figs. 1 and 5, the first portion 41 is arranged so as to abut against a pair of second base members 22 provided on the side surface 1a facing to the right.

[0046] The second portion 42 extends leftward from the rear end of the first portion 41. The second portion 42 covers a portion (right portion) of the side surface 1a facing rearward of the steel column 1. The second portion 42 is arranged with its plate surface facing in the front-to-rear direction. The second portion 42 has a connecting portion 42a.

[0047] The connecting portion 42a is a portion that is connected to a connecting portion 43a of the left panel 40B, which will be described later. The connecting portion 42a is formed at the leading end (left end) in the extension direction of the second portion 42. The connecting portion 42a includes a first extending portion 42b and a second extending portion 42c.

[0048] The first extending portion 42b extends forward from the left end of the second portion 42. The first extending portion 42b is disposed with its plate surface facing in the left-right direction.

[0049] The second extending portion 42c extends leftward from the front end of the first extending portion 42b. The second extending portion 42c is disposed with its plate surface facing the front-to-rear direction. As shown in FIGS. 1 and 5, the second extending portion 42c is disposed with a predetermined gap (a gap equivalent to the thickness of the second extending portion 43c, which will be described later) between it and the first base material 21 provided on the side surface 1a facing rearward.

[0050] The third portion 43 is a portion that extends leftward from the front end portion of the first portion 41. The third portion 43 covers a portion (right portion) of the side surface 1a facing forward of the steel column 1. The third portion 43 is arranged with its plate surface facing in the front-to-rear direction. The extension dimension of the third portion 43 is formed to be larger than the extension dimension of the second portion 42. As shown in Figures 1 and 5, the third portion 43 is arranged so as to abut against the first base material 21 and the second base material 22 provided on the side surface 1a facing forward. The third portion 43 has a connection portion 43a.

[0051] The connecting portion 43a is a portion that is connected to a connecting portion 42a of the left panel 40B, which will be described later. The connecting portion 43a is formed at the leading end (left end) in the extension direction of the third portion 43. The connecting portion 43a includes a first extending portion 43b and a second extending portion 43c.

[0052] The first extending portion 43b extends rearward from the left end of the third portion 43. The first extending portion 43b is disposed with its plate surface facing in the left-right direction.

[0053] The second extending portion 43c extends leftward from the rear end of the first extending portion 43b. The second extending portion 43c is disposed with its plate surface facing the front-rear direction. As shown in FIGS. 1 and 5, the second extending portion 43c is disposed so as to abut against the first base material 21 provided on the side surface 1a facing forward.

[0054] 1 and 5, the right-side panel 40A as described above covers the right side of the steel column 1. The left-side panel 40B is generally similar to the right-side panel 40A, except that it is positioned point-symmetrically with respect to the right-side panel 40A and covers the left side of the steel column 1. Therefore, a detailed description of the left-side panel 40B will be omitted.

[0055] The manner in which the panel 40 is attached to the base material 20 will be described below with reference to FIGS.

[0056] First, as shown in FIGS. 1 and 5, the panels 40 (right panel 40A and left panel 40B) are placed on the plate 30 and positioned so as to abut against the respective base materials 20. In this embodiment, the panels 40 are divided in the left-right direction, so that the right panel 40A and the left panel 40B can be assembled by sandwiching the steel column 1 from the left and right. In this case, as shown in FIGS. 1 and 3, the second extension portion 42c of one of the right panel 40A and the left panel 40B is positioned so as to overlap the second extension portion 43c of the other in the front-to-rear direction. In this state, the lower opening of the panel 40 is blocked by the plate 30.

[0057] 3 and 5, the panel 40 is fixed to the base material 20 using appropriate fasteners such as screws. Specifically, the fasteners are passed through the panel 40 from the outside to the base material 20, thereby fixing each component.

[0058] 3, the second extending portion 42c of one of the right panel 40A and the left panel 40B and the second extending portion 43c of the other are fixed integrally to the first base material 21 by a common fastener in a state where they overlap each other in the front-to-rear direction. This connects the right panel 40A and the left panel 40B to each other.

[0059] In this embodiment, as shown in FIG. 3 , the connecting portions (connecting portions 42a and 43a) of the right panel 40A and the left panel 40B form a recess 40b in the side surface 40a of the panel 40. Furthermore, in this embodiment, the overlapping portion between the second extension portion 42c of one of the right panel 40A and the left panel 40B and the second extension portion 43c of the other of the right panel 40A and the left panel 40B is located inside the recess 40b. As a result, the connecting portion between the right panel 40A and the left panel 40B (the overlapping portion between the second extension portion 42c and the second extension portion 43c) is located inside (toward the center in a plan view) the side surface 40a of the panel 40. Therefore, when an object moving on the slab 2 comes into contact with the panel 40, it is possible to prevent the second extension portion 42c and the second extension portion 43c from getting caught in the overlapping portion. Furthermore, the connecting portion between the right panel 40A and the left panel 40B can be made less noticeable.

[0060] As shown in Figure 1, a space A that opens upward is defined by the panel 40 fixed to the base material 20 as described above, the side surface 1a of the steel column 1, and the plate 30. The side surface 40a of the panel 40 is appropriately painted and forms the finishing surface for the root wrapping.

[0061] The concrete 4 shown in FIG. 1 is to be filled (cast) into the space A (see FIG. 8). The concrete 4 has the same quality (mixture) as the concrete 4 of the slab 2.

[0062] Next, a method for constructing the above-described root wrapping structure 10 (root wrapping construction method) will be described using Figures 6 to 8. As shown in Figure 6, the root wrapping construction method includes a base material fixing step (step S10), a plate fixing step (step S11), a panel fixing step (step S12), a concrete pouring step (step S13), and a painting step (step S14).

[0063] The base material fixing process (step S10) is a process of fixing the base material 20 to the side surface 1a of the steel column 1 by welding (see FIG. 7). The base material fixing process is performed, for example, in a specified factory before the steel column 1 is transported to the construction site.

[0064] The plate fixing step (step S11) is a step of fixing the plate 30 to the side surface 1a of the steel column 1 by welding (see FIG. 7). The plate fixing step is carried out in a predetermined factory, similar to the base material fixing step.

[0065] 7 shows the steel column 1 to which the base material 20 and the plate 30 are fixed, installed at the construction site. Note that in this state, the concrete 4 of the slab 2 has not yet been poured.

[0066] The panel fixing process (step S12) is a process of fixing the panel 40 to the base material 20. The panel fixing process is performed before pouring the concrete 4 for the slab 2. In the panel fixing process, as described above, the panel 40 is placed on the plate 30, and then the panel 40 is fixed to the base material 20 using fasteners (see FIG. 5).

[0067] After the panel fixing step is performed, an anti-rust coating is applied to the side surface 40a of the panel 40. After the coating, the side surface 40a of the panel 40 is protected (cured) with an appropriate film.

[0068] The concrete pouring step (step S13) shown in Fig. 8 is a step of pouring concrete 4 into a space A partitioned by the side surface 1a of the steel column 1, the plate 30, and the panel 40. The concrete 4 is poured from an opening above the panel 40.

[0069] The concrete pouring step is carried out at least (at the latest) before the concrete 4 of the slab 2 hardens to the extent that work on the slab 2 becomes possible (for example, before the curing period of the concrete 4 has elapsed). In this embodiment, the concrete pouring step is carried out at the same time as the step of pouring the concrete 4 of the slab 2 (for example, during a predetermined time period on the same day). More specifically, in this embodiment, the concrete 4 is poured into the space A before pouring the concrete 4 of the slab 2. Note that the concrete 4 may be poured into the space A after pouring the concrete 4 of the slab 2.

[0070] In this embodiment, when pouring the concrete 4 for the slab 2, the concrete 4 is poured so that the upper surface of the concrete 4 is positioned below the plate 30 (see FIG. 2).

[0071] The painting process (step S14) is a process of applying a finish coat to the side surface 40a of the panel 40 from which the protective film has been removed. The painting process is performed after the concrete 4 poured into the space A (the concrete 4 of the slab 2) has hardened.

[0072] By carrying out the steps as described above, the construction of the concrete wrapping is completed. According to the concrete wrapping construction method of this embodiment, the panel fixing process can be carried out before pouring the concrete 4 of the slab 2, and a space A can be formed into which the concrete 4 is filled. This means that, unlike a method in which the slab 2 is formed, the concrete 4 is arranged for the concrete wrapping and formwork is constructed on the slab 2, and then the concrete 4 is poured into the formwork, the concrete 4 can be poured into the space A and the concrete wrapping can be constructed without waiting for the slab 2 to be formed, thereby shortening the construction period.

[0073] Furthermore, according to the root wrapping construction method of this embodiment, the side surface 40a of the panel 40 becomes the finished surface of the root wrapping. Therefore, unlike when root wrapping is constructed using reinforced concrete, it is possible to eliminate the need to repair the surface of the concrete 4 after the concrete 4 has hardened and the formwork has been dismantled.

[0074] Thus, according to the root wrapping construction method of this embodiment, unlike when root wrapping is done using reinforced concrete, the construction work can be reduced by involving workers in multiple tasks such as assembling formwork, arranging reinforcement, dismantling formwork, and repairing the surface of concrete 4.

[0075] Furthermore, in the above-mentioned root wrapping structure 10, two base members 20 are provided on each side 1a of the steel column 1. This allows the panels 40 to be fixed more effectively than when a single base member 20 is provided on each side 1a, and makes it possible to prevent the panels 40 from being deformed by the load when concrete 4 is poured into the space A.

[0076] Furthermore, in the root wrapping structure 10, the right panel 40A and the left panel 40B are formed to have the same shape. This allows the load generated when concrete 4 is poured into space A to be evenly distributed across the right panel 40A and the left panel 40B. This prevents excessive load from being applied to one of the right panel 40A and the left panel 40B, which could cause deformation of the panel 40.

[0077] Furthermore, the above-mentioned root wrapping structure 10 is provided so that the plate 30 forms a gap between it and the slab 2. This allows a clearance to be formed between the slab 2 and the root wrapping in case the column (steel column 1) tilts, etc.

[0078] As described above, the root wrapping structure 10 according to the first embodiment of the present invention is A base material 20 fixed to the side surface 1a of the column (steel column 1), A panel 40 that is fixed to the base material 20 and covers the entire side surface 1a of the column (steel column 1) so that a gap is formed between the panel 40 and the side surface 1a of the column (steel column 1), and the side surface constitutes the finishing surface of the base wrapping of the column (steel column 1); a bottom (plate 30) fixed to the column (steel column 1) so as to close the gap between the side surface 1a of the column and the panel 40 from below; Concrete 4 is filled into a space A defined by the side surface 1a of the column (steel column 1), the panel 40, and the bottom (plate 30); It is equipped with the following.

[0079] This configuration reduces the labor required for wrapping concrete around the concrete. Specifically, the concrete 4 can be poured into the space A within the panel 40, which serves as both the finishing surface for wrapping concrete and the formwork, and the wrapping concrete can be installed by filling it with concrete. This allows wrapping concrete around the concrete without the need for work such as assembling the formwork, laying reinforcement, dismantling the formwork, or repairing the surface of the concrete 4, thereby reducing the labor required for installation.

[0080] The panel 40 is made of metal.

[0081] With this configuration, the panel 40 can be formed from a material suitable for both the finishing surface and formwork for the root wrapping. Also, the strength of the root wrapping can be improved.

[0082] The base material 20 is fixed to the column (steel column 1) by welding.

[0083] This configuration allows the base material 20 to be firmly fixed to the pillar (steel pillar 1). This also makes it possible to prevent the panel 40 from being deformed by the load when concrete 4 is poured into the space A.

[0084] In addition, the bottom part (plate 30) is It is installed so that a gap is formed between the slab 2 below the root wrapping.

[0085] With this configuration, a clearance can be formed between the slab 2 and the foundation for when the column (steel column 1) tilts, etc.

[0086] The panel 40 is It is composed of multiple divided members (right panel 40A and left panel 40B) divided horizontally, The dividing member (right panel 40A) has connecting portions (connecting portions 42a and 43a) formed at its end to be connected to the other dividing member (left panel 40B), The plurality of divided members (right panel 40A and left panel 40B) are The connecting portions (connecting portion 42a and connecting portion 43a) are fixed integrally with the base material 20 in a state where they are overlapped with each other.

[0087] This configuration makes it easy to attach the panel 40 to the column (steel column 1). In addition, by overlapping the connecting portions (connecting portions 42a and 43a) of the multiple divided members (right panel 40A and left panel 40B) and fixing them integrally with the base material 20, the members can be firmly fixed to each other.

[0088] The connection portions (connection portions 42a and 43a) form a recess 40b recessed toward the column (steel column 1) on the finished surface (side surface 1a).

[0089] With this configuration, the overlapping portions of the multiple dividing members (right panel 40A and left panel 40B) are located within recess 40b. Therefore, when an object moving on slab 2 comes into contact with panel 40, it is possible to prevent the dividing members (right panel 40A and left panel 40B) from getting caught on the connecting portions (connecting portions 42a and 43a) between the dividing members. In addition, it is possible to make the connecting portions between the dividing members (right panel 40A and left panel 40B) less noticeable.

[0090] Also, a method for wrapping a column (steel column 1) to protect the column, A base material fixing process (step S10) for fixing a base material 20 to the side surface 1a of the column (steel column 1); A bottom fixing process (plate fixing process) (step S11) of fixing a bottom (plate 30) constituting the bottom surface of the root wrapping to the column (steel column 1); Before pouring the concrete 4 of the slab 2 below the root wrapping, a panel 40 that covers the entire side surface 1a of the column (steel column 1) is placed on the bottom (plate 30) and a panel fixing process (step S12) is performed to fix the panel 40 to the base material 20. A concrete pouring process (step S13) of pouring concrete 4 into a space A defined by the side surface 1a of the column (steel column 1), the panel 40, and the bottom (plate 30); It is equipped with the following.

[0091] This configuration reduces the labor required for the root wrapping work. That is, the root wrapping work can be performed by pouring concrete 4 into the space A within the panel 40, which also serves as the finishing surface for the root wrapping and the formwork. This allows the root wrapping work to be performed without performing tasks such as assembling the formwork, laying reinforcement, dismantling the formwork, and repairing the surface of the concrete 4, thereby reducing the labor required for the work. Furthermore, the panel fixing process can be performed before pouring the concrete 4 for the slab 2, thereby forming the space A into which the concrete 4 is filled. This differs from a method in which the formwork is assembled on the slab 2 after the slab 2 is formed, in that concrete 4 can be poured into the space A and the root wrapping work can be performed without waiting for the slab 2 to be formed, thereby shortening the construction period.

[0092] The concrete pouring step is carried out at the same time as the pouring of the concrete 4 for the slab 2.

[0093] This configuration allows the construction of the slab 2 and root wrapping to be carried out efficiently.

[0094] The steel column 1 in this embodiment is one form of a column according to the present invention. The right panel 40A and the left panel 40B according to the present embodiment are one form of a dividing member according to the present invention. The connecting portion 42a and the connecting portion 43a according to the present embodiment are one form of a connecting portion according to the present invention. The plate 30 in this embodiment is one form of the bottom part according to the present invention. The plate fixing step in this embodiment is one form of the bottom fixing step according to the present invention.

[0095] Although the first embodiment of the present invention has been described above, the present invention is not limited to the above configuration, and various modifications are possible within the scope of the invention described in the claims.

[0096] For example, in this embodiment, the steel column 1 on which the root wrapping structure 10 is provided is a cylindrical steel pipe, but this is not limited to this. For example, as in a second embodiment shown in Fig. 9, the root wrapping structure 10 may be provided on a steel column 1A that is an H-shaped steel.

[0097] The steel column 1A has a pair of flanges 5 with plate surfaces facing left and right, and a web 6 connecting the flanges 5 with plate surfaces facing forward and backward.

[0098] In the root wrapping structure 10 according to the second embodiment, two second base materials 22 are fixed to the outer surfaces (outer surfaces in the left-right direction) of both ends of the flange 5 in the front-rear direction.

[0099] In this embodiment, support members 50 for fixing other base materials 20 are fixed to the inner surfaces (inner surfaces in the left-right direction) of both ends of the flange 5 in the front-rear direction.

[0100] The support member 50 is a long metal member (angle member) that is approximately L-shaped in cross section. The support member 50 has a portion with its plate surface facing left and right fixed to the inner surface of the flange 5, and a base material 20 (first base material 21 or second base material 22) fixed to a portion with its plate surface facing front and rear. The support member 50 is provided at the four corners of the steel column 1A in a plan view. The steel column 1A, support member 50, and base material 20 are fixed to each other by welding.

[0101] In this embodiment, the opening 31 of the plate 30 is formed in a shape (approximately H-shape) that is generally similar to the shape of the steel column 1A in plan view.

[0102] The root wrapping structure 10 according to the second embodiment as described above also provides substantially the same effects as the root wrapping structure 10 according to the first embodiment.

[0103] In the above-described embodiments, two base members 20 are provided on each side surface 1a of the steel column 1 (steel column 1A), but this is not limitative. For example, three or more base members 20 may be provided on each side surface 1a, or a single base member 20 may be provided on each side surface 1a.

[0104] Furthermore, in each of the above embodiments, an example has been shown in which the base material 20 is fixed to the steel column 1 or the support member 50 by welding, but this is not limited to such an embodiment. For example, the base material 20 may be fixed to the steel column 1 or the support member 50 using fasteners such as bolts and nuts. The support member 50 may also be fixed to the steel column 1A using fasteners such as bolts and nuts.

[0105] In addition, in each of the above embodiments, an example has been shown in which the base material 20 and the plate 30 are fixed to the steel column 1 in a factory in the base material fixing step and the plate fixing step, but this is not limited to such an embodiment. For example, the base material 20 and the plate 30 may be fixed to the steel column 1 at a construction site.

[0106] Furthermore, in each of the above embodiments, an example has been shown in which the panel 40 is fixed to the base material 20 before the concrete 4 of the slab 2 is poured, but this is not limiting. For example, the panel 40 may be fixed to the base material 20 after the concrete 4 of the slab 2 is poured.

[0107] In addition, in each of the above embodiments, the panel 40 is formed from two members, the right panel 40A and the left panel 40B, but this is not limited to this. For example, the panel 40 may be formed from three or more members. Furthermore, the panel 40 may be formed from a single cylindrical member.

[0108] Furthermore, the shapes of the components (base material 20, plate 30, and panel 40) that make up the root wrapping structure 10 are not limited to those shown in the above embodiments. The shapes of the base material 20, plate 30, and panel 40 can be changed as appropriate depending on the shape of the steel column 1 (steel column 1A). For example, if the steel column 1 is a cylindrical column, the panel 40 may be formed in a cylindrical shape.

[0109] In addition, in each of the above embodiments, the steel column 1 (steel column 1A) is used in a steel-framed building, but the present invention is not limited to this. For example, the steel column 1 may be used in a building with a concrete-filled steel pipe structure (CFT structure). [Explanation of symbols]

[0110] 1 Steel column 10 Root wrapping structure 20 Undercoat 30 plates 40 panels

Claims

1. A base material fixed to the side of the pillar, A panel that is fixed to the base material, covers the side surface of the column over the entire periphery so that a gap is formed between the side surface of the column, and the side surface constitutes the finishing surface of the column root wrapping; a bottom portion fixed to the pillar so as to close the gap between the side surface of the pillar and the panel from below; Concrete is filled into the space defined by the side of the column, the panel, and the bottom in a state where it is separated from the concrete outside the space, including the concrete of the slab below the root wrapping; A root wrapping structure comprising:

2. The base material, in plan view and cross-sectional view, The panel is formed in a generally C-shape, and the generally C-shaped opening is provided between the panel and a side surface of the column. The root wrapping structure according to claim 1.

3. The panel is made of metal. The root wrapping structure according to claim 1 or claim 2.

4. The base material is fixed to the column by welding, The pillar has a plurality of side surfaces, On one of the plurality of side surfaces, two of the base materials are provided, the two base materials having different protrusion dimensions from the one side surface in a plan view. The root wrapping structure according to any one of claims 1 to 3.

5. The panel comprises: It is composed of a plurality of divided members divided in the horizontal direction, A connecting portion is formed at an end of the divided member to be connected to another divided member, The plurality of divided members include: The connecting portions are overlapped with each other and fixed integrally to the base material. The root wrapping structure according to any one of claims 1 to 4.

6. The connection portion is A recess is formed on the finished surface that is recessed toward the column. The root wrapping structure according to claim 5.

7. A method for installing root wrapping to protect a pillar, a base material fixing step of fixing a base material to the side surface of the pillar; A bottom fixing step of fixing a bottom portion constituting a bottom surface of the root wrapping to the pillar; A panel fixing process in which a panel covering the entire side surface of the column is placed on the bottom before pouring concrete for the slab below the root wrapping, and the panel is fixed to the base material; A concrete pouring process of pouring concrete into a space defined by the side surface of the column, the panel, and the bottom, in a state where the space is separated from the concrete outside the space, including the concrete of the slab; A root wrapping construction method comprising:

8. The concrete pouring step includes: This is carried out at the same time as the concrete pouring of the slab. The root wrapping method according to claim 7.

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