Method for reusing foundation beam and architectural structure

Abstract

To enable reuse of a foundation beam.SOLUTION: A method for reusing a foundation beam comprises a division step of dividing a foundation beam of an existing building into a plurality of split beams, and a new foundation beam construction step of integrating at least one of the plurality of split beams with a new foundation beam element to form a new foundation beam.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present disclosure relates to a method for reusing foundation beams and a building. [Background technology]

[0002] A construction method for reusing existing foundations that allows for a mixture of existing and newly constructed piles is known. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2000-154549 A Summary of the Invention [Problem to be solved by the invention]

[0004] However, foundation beams are said to be difficult to reuse because their lengths vary from building to building and the columns are fixed.

[0005] Therefore, an object of the present disclosure is to enable the reuse of foundation beams. [Means for solving the problem]

[0006] In one aspect, a dividing step of dividing one foundation beam of an existing building into a plurality of divided beams; A method for reusing foundation beams is disclosed, which includes a new foundation beam construction process of integrating at least one of the plurality of split beams with a new foundation beam element to form a new foundation beam. Effect of the Invention

[0007] According to the present disclosure, it is possible to reuse foundation beams. [Brief description of the drawings]

[0008]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Figure 8

Figure 9

Embodiments for Carrying Out the Invention

[0009] Hereinafter, each embodiment will be described in detail with reference to the accompanying drawings. Note that the dimensional ratios in the drawings are merely examples and are not limited thereto, and the shapes and the like in the drawings may be exaggerated partially for the convenience of explanation. Also, in the drawings, for ease of viewing, only some of the parts having the same attribute existing in plurality may be provided with reference numerals.

[0010] FIG. 1 is a flowchart showing a schematic flow of the method for reusing a foundation beam according to this embodiment. FIGS. 2 to 9 are explanatory diagrams of each step of the reuse method shown in FIG. 1, and are schematic diagrams schematically showing the execution method of the corresponding step and the state at the time of completion of the step. In the following description, "existing" indicates that it existed in the existing building 1.

[0011] The method for reusing the foundation beam of this embodiment (hereinafter also referred to as "this method") first includes a splitting step (S20) of cutting (splitting) the foundation beam 24 of the existing building 1.

[0012] FIGS. 2 and 3 show explanatory diagrams of this step (S20). FIG. 2 schematically shows a side view of the existing building 1 including the cutting positions (two places) CT10 and CT11 of the foundation beam 24. FIG. 3 is a side view schematically showing the cut portion of the foundation beam 24. In FIGS. 2 and 3 (and FIGS. 4 and later as well), a right-handed coordinate system is associated with each figure, and the Z direction corresponds to the vertical direction.

[0013] In the example shown in FIG. 2, three columns 51, 52, and 53 are connected to the foundation beam 24, and the columns 51 and 53 are also reused in the newly constructed building 2 described later.

[0014] The cutting position is arbitrary as long as the portion of the foundation beam 24 separated by the cutting can be reused in the newly constructed building 2, but is preferably a position away from the position where the columns of the newly constructed building 2 are installed. In the example shown in FIG. 2, the cutting positions CT10 and CT11 are preferably positions away from the columns 51 and 53. In this example, as an example, the cutting positions for the foundation beam 24 are two places, and the two places consist of one place between the column 51 and the column 52 and one place between the column 52 and the column 53. In FIG. 2, the foundation beam 24 is cut along the YZ plane at each of the cutting positions CT10 and CT11.

[0015] FIG. 3 schematically shows an enlarged view of the cut portion at the cutting position CT10. The foundation beam 24 may be cut within a cutting range having a predetermined width w10 (the range between lines L31 and L32 in FIG. 3) centered on the cutting position CT10. In this case, the concrete within the cutting range having the predetermined width w10 is crushed and removed, but the reinforcing bars 15 are only cut and maintained. Therefore, from the side surfaces on the cutting position CT10 and CT11 sides, the reinforcing bars 15 protrude from the concrete. Note that the removed concrete may be used as crushed stone within the site of the new building 2.

[0016] Hereinafter, the portion of the foundation beam cut out from the foundation beam 24 in this way is also referred to as a split beam 25. In the following description, as shown in FIG. 2, the case where it is separated into three split beams 25 will be mainly described. Further, when distinguishing these split beams 25, they are denoted as split beams 251, 252, and 253. However, the number of splits from one foundation beam 24 is not limited to three, and may be two or four or more. Also, not all of the split beams obtained by splitting one foundation beam 24 need to be used as foundation beams in the new building 2, and some may be used for other purposes.

[0017] Next, this method includes a step (S21) of separating columns from some of the split beams 25. Note that this step is optional and may be omitted in a modified example. In this example, among the three columns 51 to 53, the columns 52 and 53 are separated from the split beams 252 and 253, respectively. If a body edge is provided on the separated column 53, the body edge may be used at other locations in the new building 2. This is because the column 53 is reused as a column that does not require an existing body edge, as will be described later. Note that the column 51 or the like may be reused together with the existing body edge.

[0018] Next, this method includes a step (S22) of installing the split beam 25 in the foundation beam formation range for the new building 2 and installing columns 53 and 54 on the split beam 25.

[0019] FIG. 4 schematically shows, in side view, a state in which split beams 25 are arranged within the foundation beam formation range for the new building 2. In this example, as an example, it is assumed that the length (length in the X direction) of the foundation beam formation range in the new building 2 is longer than the length of the original foundation beam 24. That is, the length (length in the X direction) of the foundation beam formation range in the new building 2 is significantly longer than the sum of the lengths of the three split beams 251 to 253. Therefore, in this case, as shown in FIG. 4, spaces S1 and S2 remain between the three split beams 251 to 253.

[0020] FIG. 5 schematically shows, in side view, a state in which columns 53 for the new building 2 are installed. In this example, column 51 has been installed at a portion corresponding to split beam 251 in foundation beam 24 since the time of the existing building 1 and is reused as it is. However, various adjustment processes such as adjustment of the height of column 51 may be performed. Column 53 was installed at a portion corresponding to split beam 253 in foundation beam 24 at the time of the existing building 1 and is relocated to split beam 252 in the new building 2. In this case, beam 23 (see FIG. 2) that was arranged between column 51 and column 53 in the existing building 1 can also be easily reused in the new building 2 (see FIG. 5). However, at this time, various adjustment processes such as adjustment of the length of beam 23 may be performed.

[0021] Here, at the end of beam 23, the upper part of column 53 was also connected in the existing building 1 (see FIG. 2). Therefore, by connecting column 53 instead of column 52 to the same end of beam 23, the connection between beam 23 and column 53 can be facilitated.

[0022] FIG. 6 schematically shows, in side view, the state where columns 54 for the new building 2 are installed. In this example, the columns 54 are installed on other foundation beams 24A (see FIG. 7) in the existing building 1 and are relocated and used. FIG. 7 schematically shows the relocation method. In the example shown in FIG. 7, the columns 54, 54A are separated from the foundation beam 24A together with the beam 23A (see arrow R71). Also, the upper part of the column 54 is cut (see the cutting position CT20), and the inclination of the beam 23A is adjusted (see arrow R72). Note that such adjustment of the inclination depends on the design of the new building 2 and may be omitted as appropriate. In this example, the beam 23A is coupled to the upper part of the column 53 as shown in FIG. 6.

[0023] Next, this method includes a foundation beam new construction step (S23) of integrating the split beam 25 and a new foundation beam element to form one new foundation beam.

[0024] FIGS. 8 and 9 show explanatory diagrams of the foundation beam new construction step (S23). FIG. 8 is a side view schematically showing the coupling mode between the reinforcing bars, and FIG. 9 is a side view schematically showing the state after completion of the foundation beam new construction step.

[0025] The foundation beam new construction step (S23) includes a step of installing an element for the new foundation beam 24B (hereinafter, also referred to as "newly installed foundation beam element 240B") between the split beams 251 to 253. Spaces S1, S2 are formed between the split beams 251 to 253 as described above. In this case, the spaces S1, S2 become the regions for forming the newly installed foundation beam element 240B.

[0026] This step (S23) first includes a step of arranging reinforcing bars 15A for the new foundation beam element in the spaces S1, S2. In this case, the reinforcing bars 15A for the new foundation beam element are coupled to the end reinforcing bars 15 in the split beam 25 by welding as shown in FIG. 8. Note that in this case, enclosed welding may be used.

[0027] Next, this step (S23) includes placing concrete in the spaces S1 and S2. As a result, as shown in FIG. 9, the divided beams 251 to 253 and the newly provided foundation beam element 240B are integrated to form a new foundation beam 24B. That is, the foundation beam element 240B is complemented in the spaces S1 and S2 as the new foundation beam 24B.

[0028] Thus, according to this embodiment, the foundation beam 24B for the newly constructed building 2 can be formed by using the foundation beam 24 of the existing building 1. That is, the foundation beam 24 of the existing building 1 can be reused.

[0029] Further, according to this embodiment, since the newly provided foundation beam element 240B is formed between the divided beams 251 to 253, the reuse of the columns (such as columns 51 and 53) of the existing building 1 can be efficiently realized. For example, since the column 51 is reused in a state of being coupled to the divided beam 251, separation and relocation are not required, and efficient reuse is possible.

[0030] Further, according to this embodiment, as described above, the cutting positions CT10 and CT11 related to the divided beams 251 to 253 are positions (intermediate positions) between the columns of the existing building 1. Thereby, when reusing the columns (such as columns 51 and 53) of the existing building 1, the newly provided foundation beam element 240B can be formed between the columns 51, 53, and 54 of the newly constructed building 2. In this case, the connection position between the newly provided foundation beam element 240B and the divided beams 251 to 253 can be set at a position relatively far from the columns 51, 53, and 54 of the newly constructed building 2. As a result, the strength required in the vicinity of the columns 51, 53, and 54 of the newly constructed building 2 in the foundation beam 24B is ensured, and the reliability of the foundation beam 24B can be improved.

[0031] As described above, each embodiment has been described in detail, but the present invention is not limited to specific embodiments, and various modifications and changes are possible within the scope described in the claims. Also, it is possible to combine all or a plurality of the components of the above-described embodiments.

[0032] For example, in the above-described embodiment, the columns installed on the split beams 251 to 253 are the columns of the existing building 1, but it is not limited thereto. For example, some or all of the columns installed on the split beams 251 to 253 may be newly installed.

[0033] Also, in the above-described embodiment, columns 51, 53, and 54 are installed on each of the split beams 251 to 253, but it is not limited thereto. For example, columns may not be installed on some or all of the split beams 251 to 253. In this case, columns may be installed on the newly installed foundation beam element 240B.

[0034] Also, in the above-described embodiment, the newly installed foundation beam element 240B is formed between the split beams 251 to 253, but it is not limited thereto. For example, the newly installed foundation beam element 240B may be formed on the opposite side of the split beam 251 (the side opposite to the side of the split beam 252). Also, the flowchart of FIG. 1 is merely an example, and the sequence of each step may be appropriately changed. For example, the step of separating the columns from some of the split beams 25 (S21) may be executed before the splitting step (S20) as the step of separating the columns from the foundation beam 24.

Description of Reference Numerals

[0035] 1 Existing building 2 New building 15, 15A Steel bars 23, 23A Beams 24, 24A, 24B Foundation beams 25 Split beam 251~253 Split beams 51~54, 54A Columns 240B Foundation beam element

Claims

1. A splitting step of splitting one foundation beam of an existing building into a plurality of split beams; And a new foundation beam construction step of integrating at least one of the plurality of split beams with a new foundation beam element to form one new foundation beam. A method for reusing a foundation beam.

2. The new foundation beam construction step includes integrating the new foundation beam element between a first split beam and a second split beam among the plurality of split beams. The method for reusing a foundation beam according to Claim 1.

3. In the existing building, a plurality of columns are connected to the one foundation beam, The splitting step includes setting a splitting position between two adjacent columns among the plurality of columns, One of the plurality of columns, which is a column used in a new building, is provided on the first split beam, The method for reusing a foundation beam according to Claim 2, wherein the other one of the plurality of columns, which is a column used in the new building, is provided on the second split beam.

4. In the existing building, a plurality of columns are connected to the one foundation beam, The splitting step includes setting a splitting position between two adjacent columns among the plurality of columns, One of the plurality of columns, which is a column used in the new building, is provided on the first split beam, The method for reusing a foundation beam according to Claim 2, wherein a column cut out from the existing building and relocated, which is a column used in the new building, or a new column is provided on the second split beam.

5. A building having a foundation beam, The foundation beam is formed by integrating at least one of a plurality of split beams split from one foundation beam of an existing building with a new foundation beam element.

Images