Load support structure and load support method

Abstract

To facilitate the progress of building construction.SOLUTION: A load support structure comprises a post 22 that supports a working platform 20, a temporary receiving member 30 that is installed on a beam or slab 14B below the platform 20 and transfers a load acting on the post 22 to the slab 14B, and a temporary support 40 that supports the slab 14B.SELECTED DRAWING: Figure 5

Description

[Technical Field]

[0001] The present invention relates to a load support structure and a load support method. [Background technology]

[0002] The following Patent Document 1 describes an underground inverted construction method in which suspension columns are added sequentially from the upper floors of the basement to the lower floors, while cutting the roots, and then the suspension columns are removed sequentially from the lower floors to the upper floors. The suspension columns are suspended and supported by the first floor floor beams, which are supported by the structural columns. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2003-34939 Summary of the Invention [Problem to be solved by the invention]

[0004] The suspension columns in Patent Document 1 do not need to support loads above. On the other hand, there are columns, such as gantry columns, that support loads above but are removed as construction work progresses. However, before such columns are removed, the columns themselves remain and temporary openings through which the columns pass remain in the slab, making it impossible to proceed with construction work on the building's facilities or finishing.

[0005] In consideration of the above, the present invention aims to provide a load-supporting structure and a load-supporting method that can facilitate the progress of building construction work. [Means for solving the problem]

[0006] The load support structure of claim 1 comprises a support pillar that supports a work platform, a temporary support member that is installed on a beam or slab below the platform and transfers the load acting on the support pillar to the beam or slab, and a temporary support that supports the beam or slab.

[0007] In the load support structure of claim 1, a temporary support member is installed on the beam or slab below the gantry, and the load acting on the support column is transferred to the beam or slab. This allows the portion of the support column below the beam or slab to be cut. This makes it possible, for example, to block a through-hole in the slab through which the support column is inserted (the slab below the slab on which the temporary support member is installed). This makes it easier to proceed with construction work, such as finishing work, compared to when the load acting on the support column is not transferred.

[0008] Furthermore, by supporting the beams or slabs with temporary supports, the gantry can be supported even if heavy machinery enters the gantry.

[0009] The load-supporting structure of claim 2 is the load-supporting structure of claim 1, in which the temporary support member is spanned above the beam or slab and supports the beam or slab, and the temporary support is positioned below the beam and supports the beam or slab.

[0010] In the load-support structure of claim 2, the load acting on the support column is supported by the temporary support via the temporary support member and the beam or slab. Therefore, the position of the temporary support can be moved below the beam or slab. This makes it easier to proceed with construction work in the space below the beam or slab.

[0011] The load-supporting structure of claim 3 is a load-supporting structure according to claim 1 or 2, wherein the temporary support member comprises a pair of support beams arranged on both sides of the support column above the beam or slab, and a pair of fixing members arranged across the pair of support beams and fixed to the support column from both sides.

[0012] In the load support structure of claim 3, support beams are arranged on both sides of the support columns, and fixing members are hung across these support beams and fixed to the support columns, making it easy to transfer the load acting on the support columns to the beams or slab.

[0013] The load support method of claim 4 comprises the steps of placing a temporary support member on a beam or slab below a work platform and transferring the load acting on a support pillar supporting the platform to the beam or slab, placing a temporary support to support the beam or slab, and cutting the portion of the support pillar below the temporary support member.

[0014] In the load support method of claim 4, a temporary support member is installed on a beam or slab below the gantry, and the load acting on the support column is transferred. This allows the portion of the support column below the temporary support member to be cut. This makes it possible to block, for example, a through-hole in the slab through which the support column is inserted (the slab below the slab on which the temporary support member is installed). Therefore, compared to when the load acting on the support column is not transferred, it is easier to proceed with construction work, such as finishing work.

[0015] Furthermore, by supporting the beams or slabs with temporary supports, the gantry can be supported even if heavy machinery enters the gantry.

[0016] The load support method of claim 5 is the load support method of claim 4, in which after the temporary support member is installed and the support pillar is cut, the cut lower portion of the support pillar is cut sequentially from the floor immediately below the floor on which the temporary support member is installed toward the floor below.

[0017] In the load support method of claim 5, the cutting of the cut lower portions of the support columns is carried out sequentially from the floor immediately below the floor where the temporary support member is installed to the floors below, thereby allowing construction to proceed from top to bottom on the floors immediately below the floor where the temporary support member is installed. [Effects of the Invention]

[0018] According to the present invention, construction work on a building can be carried out more easily. [Brief explanation of the drawings]

[0019] [Figure 1]1 is a cross-sectional view showing an example of a building under construction provided with columns to which a load support structure and a load support method according to an embodiment of the present invention are applied; [Figure 2] 1 is a cross-sectional view showing an example of a state in which a temporary receiving member is arranged in a load support structure and a load support method according to an embodiment of the present invention. [Figure 3] 1A is a plan view showing an example of a temporary receiving member in a load support structure and a load support method according to an embodiment of the present invention, and FIG. 1B is a cross-sectional view taken along line BB in FIG. 1A. [Figure 4] 1 is a cross-sectional view showing an example of a state in which temporary supports are arranged in a load support structure and a load support method according to an embodiment of the present invention. [Figure 5] 1 is a cross-sectional view showing an example of a state in which a support column is cut in a load support structure and a load support method according to an embodiment of the present invention. [Figure 6] 10 is a cross-sectional view showing an example of a state in which a temporary support member is placed on the upper floor after the support pillar is cut in the load support structure and load support method according to an embodiment of the present invention. FIG. [Figure 7] FIG. 10 is a cross-sectional view showing another example of a state in which the support column is cut in the load support structure and the load support method according to the embodiment of the present invention. [Figure 8] 1A is a plan view showing another example of a temporary receiving member in a load support structure and a load support method according to an embodiment of the present invention, and FIG. 1B is a cross-sectional view taken along line BB in FIG. DETAILED DESCRIPTION OF THE INVENTION

[0020] Hereinafter, a load support structure and a load support method according to an embodiment of the present invention will be described with reference to the drawings. Components indicated by the same reference numerals in the various drawings are the same components. However, unless otherwise specified in the specification, each component is not limited to one, and may be present in multiple numbers.

[0021] Furthermore, descriptions of overlapping configurations and symbols in each drawing may be omitted. Note that the present disclosure is not limited to the following embodiments, and may be implemented by making appropriate modifications, such as omitting configurations, replacing them with different configurations, or combining one embodiment with various modified examples, within the scope of the purpose of the present disclosure.

[0022] In each drawing, the directions indicated by arrows X and Y are directions along the horizontal plane and are perpendicular to each other. The direction indicated by arrow Z is a direction along the vertical direction (up and down). In each drawing, the directions indicated by arrows X, Y, and Z are assumed to be consistent with each other.

[0023] <Load support structure and load support method> The load support structure and load support method according to an embodiment of the present invention are used when installing a gantry (drive-in gantry) 20 as a work platform during construction of the underground structure and aboveground structure of a building 10 having a basement floor, as shown in FIG.

[0024] In Figure 1, the gantry 20 is installed on the first floor of the building 10, but the floor on which the gantry 20 is installed as a work floor is not limited to the first floor, and it may be installed, for example, on the second floor or higher of the building 10 or on a floor below the basement level.

[0025] In each drawing, four slabs 14A, 14B, 14C, and 14D are shown as basement slabs in the building 10, but the embodiment of the present invention is not limited to this, and any number of basement slabs may be provided. In other words, the present invention is applicable to buildings with basements, regardless of the number of basement floors.

[0026] The gantry 20 is supported by columns (gantry columns) 22. The lower ends of the columns 22 are fixed to the foundation 12 of the building 10. The columns 22 are disposed so as to penetrate the slab 14 (a collective term for slabs 14A, 14B, 14C, and 14D). A through-hole H is formed in the slab 14 at the portion where the columns 22 penetrate.

[0027] In the present invention, as will be described later, the vertical load acting on the support column 22 from the access gantry 20 can be transferred to the beam or slab 14 or the like, and the lower end of the support column 22 can be cut off.

[0028] In order to cut the lower end of the support 22, first, a temporary support member 30 is placed on the slab 14B below the gantry 20, as shown in Figure 2. The "slab below the gantry 20" may be any of the slabs 14A, 14B, 14C, and 14D, but in this example it refers to the lowest slab 14B, excluding the slab 14A that closes the pit.

[0029] (Temporary support material) Here, we will explain the configuration of the temporary receiving member 30. As shown in Figures 3(A) and 3(B), the temporary receiving member 30 is configured to include a support beam 32 and a fixing member .

[0030] As shown in Figure 3(A), the support beams 32 are a pair of steel members (H-shaped steel) arranged on both sides of the support column 22 and spanned above the slab 14 across the beam 16 that supports the slab 14. "Both sides of the support column 22" refers to both sides along the longitudinal direction (X direction) of the beam 16. The support beams 32 are arranged in a position facing the end faces of the flanges 22F of the support column 22.

[0031] Each support beam 32 is arranged along a direction (Y direction) perpendicular to the beam 16, and is arranged across the beam 16. In other words, the support beam 32 is long enough to be arranged above the beam 16 (not shown) on the left side of the paper in FIG. 3(A).

[0032] The fixing members 34 are a pair of steel members (channel members) that are arranged across the pair of support beams 32 and fixed to the support columns 22 from both sides. The fixing members 34 are installed perpendicular to the support beams 32 (along the X direction). The fixing members 34 are fixed to the support columns 22 using bolts.

[0033] (Temporary support) After the temporary support member 30 is installed on the slab 14B, a temporary support 40 is installed to support the slab 14B, as shown in Fig. 4. The temporary support 40 is disposed between the slab 14B and the slab 14A directly below the slab 14B, and supports the slab 14B.

[0034] The temporary supports 40 can be placed in contact with the underside of the slab 14B, but are preferably placed in contact with the underside of the beams 16 (in other words, below the beams 16). Furthermore, the temporary supports 40 are preferably placed below the support beams 32, as shown in FIG. 3(A). The temporary supports 40 may be installed prior to the installation of the temporary support members 30.

[0035] (Cutting the support pole) After installing the temporary support member 30 and the temporary support 40, the support 22 can be cut above the slab 14B and below the part fixed to the temporary support member 30 (below the fixing member 34 shown in Figure 3(B)), as shown in Figure 5.

[0036] The cut lower portion of the support 22 (the portion indicated by the two-dot chain line) is further cut and removed as appropriate. In the slab 14B and the slab 14A below the slab 14B, the through holes H at the portions where the support 22 penetrated can be plugged (filled portion S).

[0037] The cutting position of the support 22 may be below the slab 14B. In the present invention, "cutting the portion below the temporary support member" means cutting the portion below the fixing member 34.

[0038] (Repeated load transfer) The above-mentioned installation of the temporary receiving members 30, installation of the temporary supports 40, and cutting of the pillars 22 can be carried out sequentially from the lower floors to the upper floors in the basement of the building 10.

[0039] For example, as shown in Fig. 6, a temporary support member 30 is also installed on a slab 14C on the floor above slab 14B, and a temporary support 40 is installed between the slabs 14C and 14B. This allows the support column 22 to be cut above the slab 14C and below the part fixed to the temporary support member 30 (below the fixing member 34), as shown in Fig. 7.

[0040] In addition, the temporary support members 30 installed on the slab 14B can be removed. Furthermore, in the slab 14C and the slab 14B below the slab 14C, the through holes H at the portions where the supports 22 penetrated can be blocked (filled portions S).

[0041] <Action and effect> According to the load support structure and load support method of the embodiment of the present invention, as shown in FIG. 2, for example, a temporary support member 30 is installed on the slab 14B below the gantry 20 to transfer the load acting on the support column 22.

[0042] 5, the portion of the support 22 below the slab 14B can be cut off. This allows the through hole H of the slab 14A through which the support 22 is inserted to be blocked (filled portion S). Therefore, compared to when the load acting on the support 22 is not transferred, it is possible to more easily proceed with construction work such as finishing work.

[0043] Furthermore, by supporting the slab 14 with temporary supports 40, the gantry 20 can be supported even if heavy machinery enters the gantry 20.

[0044] Furthermore, according to the load support structure and load support method of the embodiment of the present invention, as shown in Figure 3(A), the temporary support member 30 is suspended above the slab 14 across the beam 16 that supports the slab 14, and as shown in Figure 3(B), the temporary support 40 is positioned below the beam 16 to support the slab 14.

[0045] As a result, the load acting on the support column 22 is supported by the temporary support 40 via the temporary support member 30 and the beam 16. Therefore, the position of the temporary support 40 can be moved below the beam 16. Alternatively, as shown in Figure 7, the temporary support 40 can be installed in a location other than below the support beam 32. This makes it easier to proceed with construction work in the space below the slab 14.

[0046] Furthermore, according to the load support structure and load support method of the embodiment of the present invention, as shown in Figure 3(A), support beams 32 are arranged on both sides of the support column 22, and fixing members 34 are hung across these support beams 32 and fixed to the support column 22. This makes it easy to transfer the load acting on the support column 22 to the beams 16.

[0047] If the support beam 32 is spanned across multiple pillars 22 and there is no fixing member 34, it will be difficult to fix the support beam 32 to each pillar 22 if any of the pillars 22 is misaligned.

[0048] In contrast to this, if the fixing member 34 is provided, even if the support column 22 is misaligned, the support column 22 can be fixed to the fixing member 34. This allows the load acting on the support column 22 to be transferred to the support beam 32 and the beam 16 via the fixing member 34.

[0049] <Other embodiments> In the above embodiment, the temporary support member 30 is bridged over the beam 16 above the slab 14, but the embodiment of the present invention is not limited to this. For example, as shown in Figure 3(A) where the end 32E of the support beam 32 is indicated by a two-dot chain line, the temporary support member 30 does not have to be bridged over the beam 16.

[0050] Furthermore, the location where the temporary supports 40 are installed is not limited to below the beams 16 or below the support beams 32, but can be changed as appropriate depending on the progress of the construction. For example, as described above, the temporary supports 40 may be placed in contact with the underside of the slab 14.

[0051] In the above embodiment, the fixing member 34 is disposed across the support beam 32 as shown in Fig. 3(A), but the embodiment of the present invention is not limited to this. For example, the fixing member of the present invention may not be disposed across the support beam 32, as in the fixing member 36 shown in Figs. 8(A) and 8(B).

[0052] 3, the flange 22F of the support column 22 does not face the support beam 32, so it is preferable to provide the fixing member 34 so as to face the flange 22F. On the other hand, in the example shown in FIG. 8, the flange 22F of the support column 22 faces the support beam 32, so it is easy to fix the support column 22 without bridging the fixing member 34 across the support beam 32.

[0053] Furthermore, in the above embodiment, the slab on which the temporary support member 30 is first installed is the lowest slab 14B excluding the slab 14A that covers the pit, as shown in Figure 5, but the embodiment of the present invention is not limited to this.

[0054] 7, for example, it may be any slab below the gantry 20 (slab 14C in this figure). In this case, after the temporary support member 30 is installed and the support column 22 is cut, the cut lower portion of the support column 22 (portion shown by the two-dot chain line) is cut sequentially from the floor immediately below the floor on which the temporary support member 30 is installed toward the floor below.

[0055] This allows construction to proceed in order from top to bottom on the floors immediately below the floor on which the temporary support member 30 is installed and on the following floors.

[0056] Furthermore, in the above embodiment, the temporary support member 30 is installed on the slab 14, but the embodiment of the present invention is not limited to this. For example, if there is no slab 14, the temporary support member 30 may be installed directly on the beam 16. As such, the present invention can be implemented in various modes. [Explanation of symbols]

[0057] 14 Slabs 14A Slab 14B Slab 14C Slab 16 Beam 20 Platform 22 Posts 30 Temporary support material 32 Support beam 34 Fixing member 36 Fixing member 40 Temporary Support

Claims

1. A support pillar supporting a work platform; A temporary support member that is installed on a beam or slab below the platform and transfers the load acting on the support to the beam or slab; A temporary support for supporting the beam or slab; A load-bearing structure having:

2. The temporary support member is bridged over a beam supporting the beam or slab above the beam or slab, and the temporary support is disposed below the beam or slab to support the beam or slab.

2. The load support structure of claim 1.

3. The temporary support member is A pair of support beams arranged on both sides of the support column above the beam or slab; a pair of fixing members disposed across the pair of support beams and fixed to the support columns from both sides; 3. The load support structure according to claim 1 or 2, comprising:

4. A step of placing a temporary support member on a beam or slab below the working platform and transferring the load acting on the support column supporting the platform to the beam or slab; placing temporary supports to support the beams or slabs; cutting a portion of the support below the temporary support member; A load support method comprising:

5. After the temporary support members are installed and the supports are cut, the cut lower portions of the supports are cut sequentially from the floor immediately below the floor on which the temporary support members are installed toward the floors below. The load supporting method according to claim 4.

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