Exterior wall repair methods for remaining lectures
By integrating the boundary of the demolished building with the remaining building and using it as a base and temporary wall, the exterior wall renovation is efficiently conducted while the building remains operational, reducing work and shortening the construction period.
Patent Information
- Authority / Receiving Office
- JP · JP
- Patent Type
- Applications
- Current Assignee / Owner
- TAKENAKA CORP
- Filing Date
- 2024-11-15
- Publication Date
- 2026-05-27
AI Technical Summary
Existing methods for renovating the exterior walls of a remaining building when adjacent to a demolished building require extensive work and prolonged construction periods, necessitating the building to be non-operational during renovation.
The method involves integrating the boundary of the demolished building with the remaining building, using the boundary as a base and temporary exterior wall, and constructing the new exterior wall while the remaining building is operational, by extending horizontal members from the remaining building's columns to connect with erected members at the boundary, adding a boundary-side foundation, and repeating the process floor by floor.
This approach reduces the amount of work required and shortens the construction period by allowing the remaining building to remain operational during renovation, utilizing the boundary as a base and temporary wall, and efficiently progressing the renovation from top to bottom.
Smart Images
Figure 2026087262000001_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to a method for renovating the outer wall of a remaining building, which is configured such that when buildings are arranged adjacent to each other, one building is a remaining building to be left intact and the other building is a demolished building to be demolished.
Background Art
[0002] For example, when buildings are arranged adjacent to each other, one building may be a remaining building to be left intact and the other building may be a demolished building to be demolished. At this time, when the demolished building is demolished, the outer wall of the remaining building will disappear, so it is necessary to newly install an outer wall and a base, and there is a need to perform renovation work on the outer wall of the remaining building.
[0003] In this outer wall renovation work, it is necessary to perform work to newly install a base on the remaining building and then perform work to newly install an outer wall. The work becomes complicated and the construction period may also become longer. Therefore, for example, when the remaining building is a factory or the like, the remaining building cannot be operated during the outer wall renovation work, and the unusable period of the remaining building becomes long.
[0004] In that regard, when demolishing a building, there is a case where a part of the outer wall of the building is preserved (for example, see Patent Document 1).
Prior Art Documents
Patent Documents
[0005]
Patent Document 1
Summary of the Invention
Problems to be Solved by the Invention
[0006] However, Patent Document 1 aims to preserve a portion of a historically valuable building, and originally preserves a portion of the existing exterior wall. Therefore, Patent Document 1 does not consider the case where, when buildings are arranged adjacent to each other, one building is designated as a "remaining building" and the other building is demolished, and the exterior wall of the remaining building disappears when the demolished building is demolished.
[0007] In view of this situation, the main objective of the present invention is to provide an exterior wall renovation method that, when buildings are arranged adjacent to each other, allows one building to be left standing and the other building to be demolished, and when exterior wall renovation work is carried out on the remaining building, enables work to be carried out on the remaining building while it is still operational, and shortens the construction period for the remaining building. [Means for solving the problem]
[0008] The first characteristic configuration of the present invention is a method for repairing the exterior wall of a remaining building in a situation where buildings are arranged adjacent to each other, in which one building is left as a remaining building and the other building is demolished. The key point is that the boundary of the demolished building is left intact and integrated with the remaining building.
[0009] According to this configuration, the boundary of the demolished building is left intact and integrated with the remaining building, so the remaining boundary of the demolished building can be used as the base for the exterior wall. This eliminates the need to install a new base, thus reducing the amount of work required on the remaining building. Moreover, since the remaining boundary can also be used as a temporary exterior wall for the remaining building, various types of work, such as integrating the boundary of the demolished building with the remaining building, or installing an exterior wall using the boundary of the demolished building as a base, can be carried out while the remaining building remains operational.
[0010] Based on the above, when carrying out exterior wall renovation work on an existing building, it is possible to shorten the construction period for the existing building while still allowing work to be done on the building while it remains operational.
[0011] A second characteristic feature of the present invention is that the boundary portion left in the demolished building is set in the vertical structural plane portion having columns and beams of the demolished building.
[0012] According to this configuration, the boundary section to be left behind is set as a vertical structural plane having columns and beams, so that the remaining portion is kept small, while the vertical structural plane can be effectively utilized as the base for the exterior wall.
[0013] A third characteristic feature of the present invention is that, at the boundary portion to be left intact, the existing exterior wall of the demolished building is left intact as a temporary exterior wall of the remaining building.
[0014] According to this configuration, at the boundary section to be left intact, the existing exterior wall of the demolished building is left as a temporary exterior wall of the remaining building. Therefore, the remaining building can be made operational while utilizing the remaining existing exterior wall as a temporary exterior wall, and the operational state of the remaining building can be stably maintained.
[0015] A fourth characteristic configuration of the present invention is that horizontal members are extended from the columns of the remaining building toward the boundary side, The horizontal members are connected to the erecting members installed between the columns at the boundary, The key feature is the integration of the remaining building with the boundary area.
[0016] According to this configuration, even if the column spans differ between the remaining building and the building to be demolished, the horizontal members extending from the columns of the remaining building can be connected to the structural members erected between the columns at the boundary on the demolition side, thereby integrating the remaining building with the boundary. Moreover, the construction work on the remaining building only requires extending the horizontal members from the columns of the remaining building, thus reducing the amount of work required on the remaining building.
[0017] The fifth characteristic configuration of the present invention is that a boundary-side foundation is added to the boundary portion that is left in place. The key point is that the added boundary-side foundation is connected to the remaining building's foundation.
[0018] According to this configuration, not only is the boundary-side foundation part added, but the added boundary-side foundation part is connected to the remaining building-side foundation part. Therefore, while reinforcing the foundation part at the boundary, the integration of the remaining building and the boundary can be firmly achieved.
[0019] The sixth characteristic configuration of the present invention has a first step of demolishing the demolition target floor in the demolished building and a second step of installing an outer wall on the demolition target floor demolished in the first step. The first step and the second step are repeatedly executed for each set floor from the upper floor side to the lower floor side in the demolished building.
[0020] According to this configuration, by repeatedly executing the first step and the second step for each set floor, the construction can be advanced from the upper floor to the lower floor while repeatedly demolishing the demolished building and installing the outer wall. As a result, the outer wall renovation work can be smoothly and efficiently advanced, and the construction period can be shortened.
Brief Description of the Drawings
[0021] [Figure 1] Plan view showing the remaining building and the demolished building [Figure 2] Front view of the boundary part of the demolished building when viewed in the first direction [Figure 3] Side view showing the boundary part of the demolished building and the remaining building when viewed in the second direction [Figure 4] Side view showing the boundary part of the demolished building and the remaining building [Figure 5] Plan view showing the boundary part of the demolished building and the remaining building [Figure 6] Diagram showing the construction procedure of the outer wall renovation work " [Figure 7] Diagram showing the construction procedure of the outer wall renovation work [Figure 8] Diagram showing the construction procedure of the outer wall renovation work
Mode for Carrying Out the Invention
[0022] The method for repairing the exterior walls of a remaining building according to the present invention will be explained based on the drawings. This method for repairing the exterior walls of a remaining building, as shown in Figure 1, is used when buildings 1 and 2 are arranged adjacent to each other in a first direction X1. One building is designated as the remaining building 1 (the upper building in Figure 1), and the other building is designated as the demolished building 2 (the lower building in Figure 1). The method involves demolishing building 2 and then repairing the exterior walls of the remaining building 1.
[0023] Incidentally, Figure 1 shows an example where the lengths of the remaining building 1 and the building to be demolished 2 are different in the second direction X2, which is perpendicular to the first direction X1. However, in the second direction X2, the lengths of the remaining building 1 and the building to be demolished 2 may be the same, and the length relationship will change depending on the situation of the remaining building 1 and the building to be demolished 2.
[0024] In this embodiment, as a method for repairing the exterior wall of a remaining building, the following steps are performed: a remaining-demolition step in which the building to be demolished is demolished while leaving the boundary portion 3 of the building to be demolished with respect to the remaining building 1, as shown in Figures 2 and 3; an integration step in which the remaining boundary portion 3 is integrated with the remaining building 1, as shown in Figures 4 and 5; and an exterior wall installation step in which a new exterior wall 4 is installed using the remaining boundary portion 3.
[0025] Figure 2 shows a front view of the boundary section 3 to be left behind in the demolished building 2, viewed in the first direction X1. Figure 3 shows a side view of the boundary section 3 and the remaining building 1 to be left behind in the demolished building 2, viewed in the second direction X2. In Figure 3-5, the remaining building 1 is shown on the right and the demolished building 2 is shown on the left. In Figure 3-5, in order to make the connection between the boundary section 3 and the remaining building 1 easier to understand, the remaining building 1 is shown with the column 11 at the end adjacent to the boundary section 3 as the center, and other parts are omitted.
[0026] (Remaining and demolition process) In the retaining / demolition process, instead of demolishing the entire building 2, as shown in Figures 2 and 3, the building 2 is demolished while retaining its boundary section 3. Since the building 2 employs a rigid frame structure (see Figure 2) with columns 21 and beams 22, the area of the boundary section 3 to be retained is set to a single vertical structural plane section 23 with columns 21 and beams 22 at the end of the building 2 on the retaining building 1 side. This allows the minimum necessary area of the building 2 to be retained as the boundary section 3 when carrying out exterior wall renovation work, and this boundary section 3 can be used as the base 41 of the exterior wall 4 (see Figures 6(C), 7(C), and 8(C)). Incidentally, in Figure 3, the boundary section 3 to be retained in the building 2 is shown with a solid line, and as indicated by the word "demolition" and arrow, the part to the right of the word "demolition" is demolished, and the part to be demolished is shown with a dotted line.
[0027] As shown in Figures 1 and 3, the existing exterior wall 5 (for example, ALC panels) of the building to be demolished 2 is located between the adjacent remaining building 1 and the building to be demolished 2. Therefore, at the boundary section 3 to be left intact, the existing exterior wall 5 of the building to be demolished 2 is left as a temporary exterior wall 6 for the remaining building 1. As a result, as shown in Figure 6-8, by using the remaining existing exterior wall 5 as a temporary exterior wall 6 covering the remaining building 1, exterior wall renovation work can be carried out while the remaining building 1 remains operational.
[0028] (integration process) In the integration process, as shown in Figures 4 and 5, the remaining boundary section 3 and the remaining building 1 are integrated. A horizontal member 31 is extended from the column 11 of the remaining building 1 toward the boundary section 3 (left side in Figures 4 and 5), and the horizontal member 31 is connected to a support member 32 that is erected between the columns 21 of the vertical structural plane section 23 at the boundary section 3, thereby integrating the boundary section 3 and the remaining building 1.
[0029] As shown in Figures 4 and 5, the columns 11 and horizontal members 31 of the remaining building 1 are made of, for example, rectangular steel pipes, with a pair of horizontal members 31 provided for each column 11. Each of the left and right pairs of horizontal members 31 is connected to the side of the column 11 by welding or the like at one end, and the left and right pairs of horizontal members 31 are arranged to sandwich the column 11, extending from both sides of the column 11 along the first direction X1 toward the boundary 3. The horizontal members 31 extend toward the boundary 3 through a penetration 61 formed in the temporary outer wall 6 of the remaining building 1.
[0030] As shown in Figure 1, in the area adjacent to the boundary 3 in the first direction X1, the remaining building 1 has multiple columns 11 spaced apart in the second direction X2, but not all of the columns 11 have a pair of horizontal members 31. For example, the column 11 located at the left end in the second direction X2 has one horizontal member 31. Incidentally, in Figure 1, the horizontal members 31 and erection members 32 added in the integration process are shown with dotted lines, and the remaining building 1 and the demolished building 2 before the integration process are shown with solid lines.
[0031] As shown in Figure 2, in the vertical structural plane 23 at the boundary section 3, multiple columns 21 on the side of the building to be demolished 2 are arranged at intervals, and erection members 32 such as H-shaped steel are stretched between the columns 21. For example, multiple erection members 32 (e.g., two) are arranged at intervals in the vertical direction on one floor. Incidentally, Figure 2 shows an example where the erection member 32 is arranged on the second floor from the bottom, but erection members 32 can be arranged on all floors from the 1st to the 3rd floors.
[0032] As shown in Figures 4 and 5, each of the multiple horizontal members 31 connected to the remaining building 1 side (see Figure 1) has its lower end connected to the upper end of the erection member 32 by welding or the like. In this way, the multiple erection members 32 connected to the boundary section 3 side and the multiple horizontal members 31 connected to the remaining building 1 side are connected by welding or the like, thereby integrating the remaining building 1 and the boundary section 3.
[0033] As shown in Figure 1, in the area where the remaining building 1 and the building to be demolished 2 are adjacent, the positions of the columns 11 of the remaining building 1 and the columns 21 of the boundary section 3 in the building to be demolished 2 are in different positions in the second direction X2. Therefore, in order to integrate the remaining building 1 and the boundary section 3, it is difficult to directly connect the columns 11 of the remaining building 1 and the columns 21 of the boundary section 3 with connecting materials or the like.
[0034] Therefore, in this embodiment, as shown in Figures 4 and 5, on the remaining building 1 side, the horizontal member 31 connected to the column 11 is extended toward the boundary 3 side, and on the boundary 3 side, a temporary support member 32 is provided between the columns 21 corresponding to the extension position of the horizontal member 31 on the remaining building 1 side. As a result, the temporary support member 32 to be connected is present at the extension position of the horizontal member 31. Thus, even if the position of the column 11 of the remaining building 1 and the position of the column 21 of the boundary 3 in the demolished building 2 are in different positions in the second direction X2, the integration of the remaining building 1 and the boundary 3 can be appropriately achieved by connecting the horizontal member 31 on the remaining building 1 side and the temporary support member 32 on the boundary 3 side.
[0035] As shown in Figure 2, a boundary-side foundation 33 is added to the lower part of the boundary section 3 that will be left in place. The added boundary-side foundation 33 and the remaining building-side foundation 12 of the remaining building 1 are connected by connecting members 7 such as post-installed anchors, as shown in Figure 3. This allows for the reinforcement of the foundation at the boundary section 3 while firmly integrating the remaining building 1 and the boundary section 3.
[0036] (Outer wall installation process) In the exterior wall installation process, as shown in Figures 6(C), 7(C), and 8(C), the remaining boundary section 3 is used as a base 41, and the new exterior wall 4 is installed on this base 41. This allows the exterior wall 4 to be installed by effectively utilizing the remaining boundary section 3 without having to carry out new base construction work.
[0037] In this embodiment, the processes of retaining / demolition, integration, and exterior wall installation are carried out. However, instead of performing each of these processes one by one in order, the order of construction is devised to ensure that the exterior wall renovation work proceeds smoothly and efficiently.
[0038] The following describes the construction sequence of exterior wall renovation work, based on the schematic diagram in Figure 6-8. Incidentally, in Figure 6-8, the remaining building 1 is shown on the right and the building to be demolished 2 is shown on the left, and each component is schematically shown to make the construction sequence easier to understand. For example, the building to be demolished 2 is shown as a three-story building with the third floor being the roof, but various types of buildings with multiple floors can be applied.
[0039] First, as shown in Figure 6(A), the boundary 3 between the remaining building 1 and the building to be demolished is integrated before demolishing the building to be demolished 2. Before demolishing the building to be demolished 2, as shown in Figures 4 and 5, horizontal members 31 are installed on the columns 11 of the remaining building 1, and erecting members 32 are installed between the columns 21 at the boundary 3 of the building to be demolished 2. The horizontal members 31 and the erecting members 32 are then connected to integrate the boundary 3 between the remaining building 1 and the building to be demolished 2.
[0040] Next, as shown in Figure 6(B), the third floor of the building to be demolished 2 is demolished, and temporary units 101 (schematically shown as gray rectangles in the figure), such as scaffolding, are installed on the third floor of the building to be demolished 2. Then, as shown in Figure 6(C), the boundary 3a of the third floor at the remaining boundary 3 of the building to be demolished 2 is used as the base 41, and the exterior wall 4a of the third floor of the new exterior wall 4 is installed, along with other work such as the installation of coping 102 and expansion joints. By using the remaining existing exterior wall 5 as a temporary exterior wall 6 to cover the remaining building 1, various works in the exterior wall renovation can be carried out while the remaining building 1 remains operational.
[0041] As shown in Figure 7(A), the temporary unit 101 installed on the third floor of the building to be demolished 2 is removed and temporarily placed on the construction site, etc. Then, as shown in Figure 7(B), the second floor of the building to be demolished 2 is demolished and the temporary unit 101 is installed on the second floor of the building to be demolished 2. As shown in Figure 7(C), the boundary 3b of the second floor at the boundary 3 of the building to be demolished 2 is used as the base 41, and the exterior wall 4b of the second floor of the new exterior wall 4 is installed, and construction work such as the installation of expansion joints is carried out. At this time, when installing the exterior wall 4b of the second floor, the exterior wall 4b of the second floor is installed in a state where it is joined to the exterior wall 4a of the third floor.
[0042] As shown in Figure 8(A), the temporary unit 101 installed on the second floor of the building to be demolished 2 is removed and temporarily placed on the construction site, etc. Then, as shown in Figure 8(B), the first floor of the building to be demolished 2 is demolished and the temporary unit 101 is installed on the first floor of the building to be demolished 2. As shown in Figure 8(C), the boundary 3c of the first floor at the boundary 3 of the building to be demolished 2 is used as the base 41, and the first floor exterior wall 4c of the new exterior wall 4 is installed, and construction work such as the installation of expansion joints is carried out. At this time, when installing the first floor exterior wall 4c, the first floor exterior wall 4c is installed in a state where it is joined to the second floor exterior wall 4b.
[0043] Thus, the exterior wall renovation work includes a first step of demolishing the floors to be demolished in the building 2, as shown in Figures 6(B), 7(B), and 8(B), and a second step of installing the exterior wall 4 on the floors to be demolished in the first step, as shown in Figures 6(C), 7(C), and 8(C). The first and second steps are repeatedly performed in the building 2, from the upper floors to the lower floors, in sets of floors (for example, one floor at a time).
[0044] By repeatedly executing the first and second processes one floor at a time, the demolition of the building 2 and the installation of the exterior wall 4 can be carried out repeatedly, with each floor serving as a single unit. This allows the exterior wall renovation work to proceed smoothly and efficiently from the upper floors to the lower floors. Furthermore, only temporary units 101 such as scaffolding need to be prepared for one floor, simplifying the configuration of the temporary units 101 themselves and reducing the time required for their installation and removal, thereby shortening the construction period.
[0045] [Another embodiment] Other embodiments of the present invention will now be described. Note that the configurations of each embodiment described below are not limited to being applied individually, but can also be applied in combination with the configurations of other embodiments.
[0046] (1) In the above embodiment, when integrating the remaining building 1 and the boundary section 3, a horizontal member 31 is provided on the remaining building 1 side, a temporary member 32 is provided on the boundary section 3 side, and the horizontal member 31 and the temporary member 32 are connected as an example. However, the type of members provided to integrate the remaining building 1 and the boundary section 3 can be changed as appropriate.
[0047] For example, in a section where the remaining building 1 and the building to be demolished 2 are adjacent, if the position of the column 11 of the remaining building 1 and the position of the column 21 of the boundary section 3 in the building to be demolished 2 are in the same position in the second direction X2, then the remaining building 1 and the boundary section 3 can be integrated by directly connecting the column 11 of the remaining building 1 and the column 21 of the boundary section 3 with a connecting material or the like.
[0048] (2) In the above embodiment, the construction procedure for the exterior wall repair work was illustrated as follows, as shown in Figure 6-8, by repeatedly performing a first step of demolishing the floors to be demolished in the building 2 to be demolished, and a second step of installing the exterior wall 4 on the floors to be demolished in the first step, in set floors (for example, one floor at a time) from the upper floors to the lower floors in the building 2 to be demolished. However, the construction procedure for carrying out the exterior wall repair work can be changed as appropriate.
[0049] (3) In the above embodiment, the range of the boundary portion 3 to be left in the demolished building 2 is set to a single vertical structural plane portion 23 having columns 21 and beams 22 at the end of the demolished building 2 on the side of the building to be left 1, but the range can be changed as appropriate. [Explanation of Symbols]
[0050] 1. Remaining building 2. Buildings to be demolished 3. Boundary 4. Exterior walls 5 Existing exterior wall 6. Temporary exterior wall 11. Pillars of the remaining building 12 Remaining building side foundation 21 Columns of the demolished building 22 Beams of demolished buildings 23 Vertical structure section 31 Horizontal members 32 Erection materials 33 Foundation on the boundary side
Claims
1. In a method for repairing the exterior wall of a building that is left standing when two buildings are adjacent to each other, in which one building is left standing and the other building is demolished, A method for renovating the exterior wall of a remaining building, which involves leaving the boundary portion of the demolished building intact and integrating it with the remaining building.
2. The method for repairing the exterior wall of a building to be left behind in the demolished building, wherein the boundary portion to be left behind in the demolished building is set in the vertical structural plane having columns and beams of the demolished building.
3. The method for repairing the exterior wall of a remaining building according to claim 1 or 2, wherein at the boundary portion to be left intact, the existing exterior wall of the demolished building is left intact as a temporary exterior wall of the remaining building.
4. A horizontal member is extended from the column of the remaining building toward the boundary side. The horizontal members are connected to the erecting members installed between the columns at the boundary, A method for repairing the exterior wall of a remaining building according to claim 1 or 2, wherein the remaining building and the boundary portion are integrated.
5. A boundary-side foundation will be added to the boundary section that will remain. A method for repairing the exterior wall of a remaining building according to claim 1 or 2, wherein the added boundary-side foundation is connected to the remaining building's foundation.
6. The process comprises a first step of demolishing the floor to be demolished in the aforementioned building, and a second step of installing an exterior wall on the floor to be demolished in the first step. The method for repairing the exterior wall of a remaining building according to claim 1 or 2, wherein the first and second steps are repeatedly performed in the demolished building, from the upper floors to the lower floors, in sets of set floors.