JP2004162473A - Method for preserving existing external-wall structure - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a method for preserving an existing external-wall structure, which has excellent workability and does not depend upon site conditions or the like. <P>SOLUTION: The existing structure 1 is demolised, leaving an existing rigid-frame skeleton 7 composed of the existing external-wall structure 6, second paired existing columns 4 and existing beams 5 mutually connecting these structure and columns. A temporary frame 8 is installed in the existing rigid-frame skeleton 7. The second existing columns 4 and the existing beams 5 for the existing rigid-frame skeleton 7 left for self-supporting the structure 6 are demolished, and the structure 6 is supported by the temporary frame 8. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a method for preserving an existing structure in which a part of an existing outer wall structure constituting an existing structure is partially stored.
[0002]
[Prior art]
In recent years, modern famous buildings are often forced to be demolished due to deterioration and seismic resistance. However, since these buildings have high historical value, there is an increasing need to preserve the buildings themselves or a part of the structural members constituting the buildings.
Under such circumstances, as shown in Patent Document 1, when preserving the wall surface of an existing building, the wall surface is integrated with a reinforced concrete slab and then cut into an arbitrary size, which is used as a new structure as an exterior plate. Are disclosed.
[0003]
[Patent Document 1]
JP-A-54-77424 (see FIG. 4)
[0004]
By the way, when dismantling other structural members while leaving only the wall of the existing building to be preserved, it is necessary to first install a reinforcing steel frame so as to surround the wall to be preserved.
[0005]
[Problems to be solved by the invention]
However, installation of the reinforcing steel frame cannot use heavy equipment or the like due to the presence of an existing building, and thus often poses a problem in workability. In addition, when there is no room on the site, the reinforcing steel frame cannot be extended and installed on the surface side of the wall surface, that is, outside of the existing building, and the construction itself is very complicated.
[0006]
In view of the above circumstances, an object of the present invention is to provide a method for preserving an existing outer wall structure which has good workability and is not affected by site conditions or the like.
[0007]
[Means for Solving the Problems]
A method for preserving an existing outer wall structure according to claim 1, wherein the existing outer wall structure includes an existing outer wall constituting the existing structure and a pair of first existing columns integrally standing on both sides of the existing outer wall. A method for preserving an existing outer wall structure in which a body is partially stored, the method comprising: a second pair forming a pair that faces a back surface of an existing outer wall structure to be preserved and stands at a position facing the first existing column. And the existing ramen frame composed of a plurality of existing beams that connect the second existing columns adjacent to each other and the second existing columns and the first existing columns, respectively, Disassembling, and then constructing a temporary frame supporting the existing outer wall structure inside the existing ramen frame, supporting the existing outer wall structure with the temporary frame, and then configuring the existing ramen frame On the ground of the second existing pillar that makes a pair And it is characterized by dismantling the existing beams.
[0008]
3. The method for preserving an existing outer wall structure according to claim 2, wherein after the existing outer wall structure is supported by the temporary frame, the existing outer wall structure is independently erected between the existing outer wall structure and the temporary frame on the back side of the existing outer wall structure. A first step of constructing a frame, supporting an existing outer wall structure on the reinforcing frame, and reinforcing an existing base portion vertically supporting the existing outer wall structure, so as to be integrated with the existing base portion, A second step of constructing a new foundation for supporting the new structure to be constructed adjacent to the existing outer wall structure; and providing the new structure above the new foundation with at least the height of the existing outer wall structure. Along with building up to a level located at the same level, constructing an overhanging floor protruding toward the reinforcing frame from the same level as the vicinity of the top of the reinforcing frame and the top of the reinforcing frame facing the new structure. Nearby And a third step of horizontally connecting the overhanging floor of the new structure with a connecting member with a pin roller support that is freely rotatable and horizontally movable, and disassembling and removing the temporary frame to form the new structure. A fourth step of constructing an overhanging floor projecting toward the reinforcing frame at each level and completing a new structure.
[0009]
In the method for preserving an existing outer wall structure according to claim 3, the reinforcement of the existing foundation portion performed in the second step is performed outside the area of the existing foundation portion supporting the existing frame body by the first step. A pair of new piles are arranged so as to face each other near each side of a straight line connecting the existing pillar and the leg of the second existing pillar, and the legs of the adjacent second existing pillar are connected to each other. The first underground wall and the second underground wall are constructed so as to connect the existing pillar and the leg of the second existing pillar, and the opposed new piles are connected to each other, and the second underground wall is connected to the second underground wall. After the foundation beam is constructed so as to be integrated, a new foundation is constructed so that the new pile becomes a part of the new foundation.
[0010]
5. The method for preserving an existing outer wall structure according to claim 4, wherein the connecting member with the pin roller support used in the third step is a fixing member made of a horizontal material whose rigidity in a vertical direction can be adjusted, and is flush with the fixing member. A round bar-shaped shaft member which is arranged in parallel on the upper side and both ends are fixed to a fixing member via a connecting means, and is freely penetrated by the shaft member and freely rotates in the circumferential direction, and freely in the length direction. A rotating member that moves, and a bracket provided on the rotating member and protruding in a direction perpendicular to the shaft member, wherein the fixed member is newly installed near a top on a surface side facing a new structure of the reinforcing frame. After being horizontally fastened via a fastening means to a height position which is the same level as the overhanging floor of the structure, after adjusting the level, the overhanging floor of the new structure located at the same height, Bracket fastening means It is characterized by fastening through.
[0011]
BEST MODE FOR CARRYING OUT THE INVENTION
The method for preserving an existing outer wall structure according to the present invention comprises constructing an existing ramen frame by using the existing outer wall structure to be preserved and surrounding structures, dismantling the existing structure while leaving the existing ramen frame, and disposing the existing ramen frame. By installing a temporary frame that supports the existing external wall structure inside of the above, workability is improved without being affected by site conditions.
[0012]
(First Embodiment)
As shown in FIG. 1A, the existing structure 1 is composed of a steel frame or a reinforced concrete frame including columns 2 and beams 3. In the present embodiment, a method for preserving the existing outer wall structure 6 which is a part of the structural member constituting the existing structure 1 will be described in detail.
FIG. 1 is a cross-sectional view of a method of preserving an existing structure, and FIG. 2 is a plan view of a method of preserving a substructure. The existing outer wall structure 6 includes an existing outer wall 6a and a pair of first existing pillars 6b integrally formed on both side ends of the existing outer wall 6a.
[0013]
First, as shown in FIGS. 1 (a) and 2 (a), the existing structure 1 is dismantled, but not all of the existing outside wall structure 6 to be preserved is dismantled. 6, a pair of second existing columns 4 arranged at positions facing the first existing columns 6a, respectively, and a pair of the second existing columns 4 and the first existing column. 6a and a plurality of existing beams 5 connecting the second existing columns 4 are left. This aims at maintaining the state in which the existing outer wall structure 6 stands up without using a temporary material even when the existing structure 1 is dismantled. The two existing columns 4 and the existing beams 5 form an existing ramen frame 7 having a self-supporting ramen structure.
[0014]
Next, as shown in FIG. 1B and FIG. 2B, a temporary frame 8 is installed inside the existing ramen frame 7. The temporary frame 8 is installed for the purpose of temporarily supporting the existing outer wall structure 6, and in the present embodiment, forms a rigid frame including columns 8a and beams 8b. The temporary frame 8 is configured to fasten members such as the column 8a and the beam 8b by fastening means such as bolts and nuts (not shown) in consideration of disassembly and removal later. These pillars 8a of the temporary frame 8 are supported by being buried in concrete 9 with their legs erected on the upper surface of the existing foundation 11 of the existing structure 1.
In addition, since the existing structure 1 is dismantled around the existing ramen frame 7, the site of the existing structure 1 can be secured as a work space. Therefore, when the temporary frame 8 is installed, the structures such as the columns 8a and the beams 8b are used. It is possible to use a heavy machine for lifting members.
[0015]
Thereafter, as shown in FIGS. 1 (c) and 2 (c), the ground portion and the existing beam of the second existing column 4 of the existing ramen frame 7 left to erect the existing outer wall structure 6 are provided. 5 is disassembled, and the existing outer wall structure 6 is supported by the temporary frame 8.
[0016]
According to the above-described configuration, since the temporary frame 8 for temporarily supporting the existing outer wall structure 6 is constructed on the site of the existing structure 1, the general-purpose frame 8 is used regardless of the site conditions around the existing structure 1. It is possible to use this method.
In addition, the existing outer wall structure 6 constitutes an existing ramen frame 7 that can stand alone together with the second existing column 4 and the existing beam 5, and after dismantling the other existing structure 1 while leaving the existing ramen frame 7, Since the temporary frame 8 is constructed, the temporary frame 8 can be constructed in parallel with the new construction work on the site of the dismantled existing structure 1, thereby shortening the construction period and using heavy equipment used for the new construction work. Thus, the construction work of the temporary frame 8 can be performed, so that the workability can be greatly improved.
[0017]
(Second embodiment)
According to the first embodiment, the existing outer wall structure 6 is partially preserved from the existing structure 1. A method of using and saving such an existing outer wall structure 6 as an outer wall of a new structure 12 constructed on the site of the existing structure 1 will be described below.
FIG. 3 is a cross-sectional view of a method for preserving an existing structure, and FIG. 4 is a plan view of a method for preserving a substructure.
[0018]
In the first step, as shown in FIGS. 3 (a) and 4 (a), the reinforcing frame 10 which can stand upright at a position sandwiched by the temporary frame 8 on the back side of the existing outer wall structure 6. Is constructed, and the reinforcing frame 10 and the existing outer wall structure 6 are connected via a plurality of supporting members 10b provided at a predetermined distance in the height direction.
As shown in FIG. 6, the reinforcing frame 10 is formed of a steel frame. As shown in FIG. 6, a reinforcing frame main body 10a formed in a frame shape having substantially the same size as the existing outer wall structure 6, and the reinforcing frame And a support member 10b arranged on one surface of the main body 10a at a predetermined interval. These reinforcing frames 10 are parallel to the existing outer wall structure 6 with a predetermined separation distance in a state where one surface of the reinforcing frame main body 10a provided with the support member 10b faces the back surface of the existing outer wall structure 6. Placed in
[0019]
In the present embodiment, the horizontal member 10c is bridged at the opening of the reinforcing frame body 10a at the same height position as the position where the beam 6c included in the existing outer wall structure 6 is arranged. The support member 10b is fixed to the horizontal member 10c via fixing means. Accordingly, the support member 10b supports the position of the beam 6c included in the existing outer wall structure 6, so that the existing outer wall structure 6 can be more safely supported. However, it is not always necessary to provide the horizontal member 10c at the opening of the reinforcing frame 10, and the opening may be treated at any position as long as the reinforcing frame main body 10a can function as a ramen structure. In this case, the support member 10b may be fixed to the reinforcing frame body 10a via fixing means.
In the present embodiment, a slab material having the same length as the horizontal member 10c is used for the support member 10b, and the existing outer wall structure 6 is linearly supported by the reinforcing frame 10. Configuration. However, it is not always necessary to use a slab material for the support member 10b. A plurality of rigid projecting members are provided on one surface of the reinforcing frame body 10a, and the existing outer wall structure 6 is attached to the reinforcing frame 10. It is good also as a structure which supports it.
[0020]
In the second step, as shown in FIG. 3 (b), the existing outer wall structure is reinforced so as to reinforce the existing foundation 11 supporting the existing ramen frame 7, and to be integrated with the existing foundation 11. A new foundation 13 that supports a new structure 12 that is constructed adjacent to the body 6 is constructed.
The procedure for reinforcing the existing foundation 11 and integrating it with the new structure 12 will be described in detail below with reference to a plan view of the existing foundation 13 shown in FIG.
[0021]
First, as shown in FIG. 5, a pair of new piles is formed outside the existing foundation 11 and in the vicinity of each straight line connecting the first existing column 6b and the leg 4a of the second existing column 4 to each other. Build 14. The newly-installed piles 14 are generally used BH piles, which are arranged so as to be parallel to the wall surface of the existing outer wall structure 6 when they are connected with a straight line.
Next, the first underground wall 16a is connected to connect the legs 4a of the adjacent second existing columns 4 and the legs 4a of the first existing columns 6b and the second existing columns 4 to each other. The second underground wall 16b is constructed. The first underground wall 16a and the second underground wall 16b are made of reinforced concrete, and each of the existing foundation 11, the first existing column 6b, and the leg 4a of the second existing column 4 An anchor (not shown) is provided so as to straddle both of them, thereby being firmly fixed.
Next, the foundation beam 17 is constructed so as to bridge the pile head of the new pile 14 forming the pair. At this time, the foundation beam 17 is constructed so as to be integrated with the second underground wall 16b. Thereby, the existing foundation 11 and the existing outer wall structure 6 supported by the existing foundation 11 are supported by the new pile 14.
Thereafter, a new foundation 13 for supporting the new structure 12 is constructed. At this time, the new foundation 13 is configured to take in the new pile 14 together with the foundation pile 15 provided as the new foundation 13, and is provided above the new foundation 13 so as to surround the existing outer wall structure 6. The new underground wall 18 is constructed so as to connect the new pile 14 and the foundation pile 15 adjacent thereto. As a result, the existing outer wall structure 6 and the existing foundation 11 supporting the reinforcing frame 10 supporting the existing outer wall structure 6 are not only integrated with the new foundation 13, but also integrated with the new foundation 13. It will be supported by.
[0022]
In the third step, as shown in FIGS. 3 (b) and 4 (b), the new structure 12 is positioned above the new foundation 13 at least as high as the height of the existing outer wall structure 6. And a floor 19a extending from the same level as the vicinity of the top of the reinforcement frame 10 toward the reinforcement frame 10 is constructed, and the top of the reinforcement frame 10 on the surface side facing the new structure 12 is constructed. The vicinity and the overhanging floor 19a of the new structure 12 are connected using a connecting member 20 with a pin roller support.
[0023]
As shown in FIG. 6, the connecting member 20 with a pin roller support has a round bar-shaped shaft member 21, which is penetrated by the shaft member 21 and freely slides in the length direction of the shaft member 21, and also in the circumferential direction. A rotating member 22 that freely rotates, a bracket 26 provided on the rotating member 22, and a horizontal plate-shaped member arranged in parallel with the shaft member 21 and fixed to both ends of the shaft member 21 via a connecting member 24. And the fixing member 23. When an external force is applied, the rotating member 22 moves horizontally or rotates with respect to the shaft member 21, so that the bracket 26 provided on the rotating member 22 becomes a fixed member 23. Rotate or move horizontally with respect to.
In the present embodiment, a pair of shaft members 21 are arranged in series, a rotation member 22 is attached to each of them, and these rotation members 22 are fixed to a connecting member 25 arranged in parallel with the shaft member 21. The connecting member 25 is provided with a bracket 26. On the other hand, as the fixing member 23, a truss member arranged horizontally is used. Note that the fixing member 23 does not necessarily need to use a horizontally arranged truss member, and any structure may be used as long as the rigidity can be adjusted when a vertical force acts on the fixing member 23. .
[0024]
A method of attaching such a connecting member 20 with a pin roller support will be described below.
First, as shown in FIG. 7A, the fixing member 23 is fastened to a predetermined position near the top of the existing outer wall structure 6 via fastening means. A cheek stick member 27 made of diagonal material is provided below the fixing member 23. The cheek stick member 27 is fastened to a predetermined position of the existing outer wall structure 6 via a fastening means, and The connecting member with pin roller support 20 is fixed to the structure 6 horizontally. At this time, the bracket 26 is rotated in the circumferential direction of the shaft member 21 and held in an upward state.
[0025]
Next, as shown in FIG. 7B, the bracket 26 is fixed to the overhanging floor 19 a of the new structure 12. The bracket 26, which has been held upward and held in the notch, is fitted by rotating and arranging the bracket 26 horizontally, and the two are fastened via fastening means. In consideration of a case where the level does not match between the upper surface of the notch provided on the overhanging floor 19a and the lower surface of the bracket 26, a joint having a loose hole installed at the connection between the bracket 26 and the overhanging floor 19a. The two may be fastened using the plate 28.
[0026]
In this way, the existing outer wall structure 6 and the new structure 12 connected via the connecting member 20 with the pin roller support are connected to the new structure 12 while the existing outer wall structure 6 is supported by the new structure 12. Are insulated, and do not buffer their behavior even in the event of an earthquake or the like.
[0027]
In the fourth step, as shown in FIG. 3 (c), the temporary frame 8 is dismantled and removed, and an overhanging floor 19 projecting toward the reinforcing frame 10 is constructed on each level of the new structure 12, The new structure 12 is completed.
As can be seen from FIG. 3 (c), the existing foundation portion 11 has a configuration that greatly protrudes toward the new structure 12 as compared with the existing outer wall structure 6. Therefore, a large space is formed between the existing outer wall structure 6 and the new structure 12. Such a configuration in which the new structure 12 is provided with the overhanging floor 19 projecting toward the existing outer wall structure 6 attempts to effectively use the space between the existing outer wall structure 6 and the new structure 12. Things.
Note that when an earthquake or the like occurs, the existing outer wall structure 6 and the new structure 12 exhibit different behaviors. In such a behavior, a predetermined clearance L is provided between the existing outer wall structure 6 and the overhanging floor 19 in order to prevent a collision therebetween.
[0028]
According to the above-described configuration, the reinforcing of the existing foundation 11 and the construction of the new foundation 13 provided integrally therewith are performed by supporting the existing outer wall structure 6 on the upper portion and the existing outer wall structure 6. Since the work can be performed while only the reinforcement frame 10 and the temporary frame 8 are left, there is no need to work in an inferior environment such as being sunk under the existing structure 1, so that work safety is high and work efficiency is greatly improved. As well as improving the accuracy, it is possible to greatly contribute to improving the accuracy, reducing the construction cost, and shortening the construction period.
[0029]
The connection between the existing outer wall structure 6 and the new structure 12 can be performed by fastening the connecting members 20 with pin roller supports to each of them via fastening means, so that complicated work such as on-site welding can be omitted. It is possible to improve the construction accuracy while improving the workability. In addition, since the connecting member 20 with the pin roller support only needs to be provided at one location near the top of the existing outer wall structure 6, work at high places can be significantly reduced, and work safety can be improved.
[0030]
【The invention's effect】
According to the method for preserving an existing outer wall structure according to the first aspect, an existing outer wall comprising an existing outer wall constituting the existing structure and a first existing pillar forming a pair integrally standing on both sides of the existing outer wall. A method of preserving an existing outer wall structure in which an outer wall structure is partially stored, wherein the outer wall structure faces a back surface of the existing outer wall structure to be stored and forms a pair standing upright at a position facing the first existing pillar. The said existing structure, leaving a second existing pillar, an adjacent second second existing pillar, and an existing ramen frame composed of a plurality of existing beams respectively connecting the second existing pillar and the first existing pillar. Dismantling the object, and then constructing a temporary frame for supporting the existing outer wall structure inside the existing ramen frame, and supporting the existing outer wall structure with the temporary frame, The second existing pillar that forms a pair Since the above-ground parts and existing beams are dismantled, a temporary frame that temporarily supports the existing external wall structure is built on the site of the existing structure. This method can be used.
Further, the existing outer wall structure constitutes an existing ramen frame that can stand alone together with the second existing columns and the existing beams, and after dismantling other existing structures while leaving the existing ramen frame, constructing a temporary frame. From this, a temporary frame can be constructed in parallel with the new construction work on the site of the dismantled existing structure, shortening the construction period, and constructing the temporary frame using heavy equipment etc. used for new construction Therefore, workability can be greatly improved.
[0031]
According to the method for preserving an existing outer wall structure according to claim 2, after the existing outer wall structure is supported by the temporary frame, the existing outer wall structure is independently erected on the back side of the existing outer wall structure with the temporary frame. A first step of constructing a reinforcing frame to support the existing outer wall structure on the reinforcing frame, and reinforcing an existing base portion vertically supporting the existing outer wall structure so as to be integrated with the existing base portion. A second step of constructing a new foundation for supporting a new structure to be constructed adjacent to the existing outer wall structure; and Construct up to a level that is approximately the same as the height, and construct an overhanging floor that projects toward the reinforcement frame from the same level as the vicinity of the top of the reinforcement frame, and face the reinforcement frame facing the new structure. of A third step of connecting the vicinity of the part and the overhanging floor of the new structure horizontally using a connecting member with a pin roller support that is rotatable and horizontally movable, and disassembling and removing the temporary frame to newly install the structure. Since the fourth step of constructing an overhanging floor projecting toward the reinforcing frame at each level of the structure and completing the new structure is performed, the new structure can be used without modifying the existing outer wall itself. Since it can be reused for objects, it is possible to appropriately meet the needs surrounding historic buildings, such as preserving buildings with high historical value.
[0032]
According to the method for preserving the existing outer wall structure according to claim 3, the reinforcement of the existing foundation portion performed in the second step is performed outside the region of the existing foundation portion supporting the existing frame body. A pair of new piles are arranged so as to face each other near the side of each straight line connecting the legs of the first existing pillar and the legs of the second existing pillar, and the legs of the second existing pillar adjacent to each other, and A first underground wall and a second underground wall are constructed so as to connect the legs of the one existing pillar and the second existing pillar, and the opposed new piles are connected to each other while the second underground is connected. After constructing the foundation beam so as to be integrated with the wall, since the new foundation is constructed so that the new pile becomes a part of the new foundation, the reinforcement of the existing foundation, and the integral construction thereof The construction of the new foundation is provided so that the existing outer wall structure is Since it can be performed only with the supporting reinforcement frame and temporary frame left, there is no need to work under poor environment such as sneaking under existing structures, work safety can be improved, and work efficiency can be greatly improved It is possible to greatly contribute to improvement of accuracy, reduction of construction cost, and shortening of construction period.
[0033]
According to the preservation method of the existing outer wall structure according to claim 4, the connecting member with the pin roller bearing used in the third step is a fixing member made of a horizontal material whose rigidity in the vertical direction can be adjusted; A round bar-shaped shaft member which is arranged in parallel on the same plane, and whose both ends are fixed to the fixing member via the connecting means, and is freely penetrated by the shaft member and freely rotates in the circumferential direction, and in the length direction A rotating member that freely moves, and a bracket provided on the rotating member and protruding in a direction perpendicular to the shaft member, wherein the fixing member is located near a top on a surface side facing a new structure of the reinforcing frame. In the height position which becomes the same level as the overhanging floor of the new structure, after horizontally fastening through the fastening means, after adjusting the level, on the overhanging floor of the new structure located at the same height , Tighten the bracket Since the connection between the existing outer wall structure and the new structure can be performed by fastening the connecting member with the pin roller support to each of the two via the fastening means, complicated work such as field welding can be performed. Work can be omitted, workability is good, and construction accuracy can be improved. In addition, since the connecting member with the pin roller support only needs to be provided at one location near the top of the existing outer wall structure, work at high places can be significantly reduced, and work safety can be improved.
[Brief description of the drawings]
FIG. 1 is a diagram showing a side view of a first embodiment of a method for preserving an existing outer wall structure according to the present invention.
FIG. 2 is a view showing a cross-sectional view of the first embodiment of the method for preserving an existing outer wall structure according to the present invention.
FIG. 3 is a diagram showing a side view of a second embodiment of the method for preserving an existing outer wall structure according to the present invention.
FIG. 4 is a sectional view showing a second embodiment of the method for preserving an existing outer wall structure according to the present invention.
FIG. 5 is a view showing an existing foundation and a new foundation according to the method for preserving an existing outer wall structure according to the present invention.
FIG. 6 is a view showing a connecting member with a pin roller support according to the present invention.
FIG. 7 is a view showing a method of attaching a connecting member with a pin roller support according to the present invention.
[Explanation of symbols]
1 Existing structures
2 pillars
3 beams
4 Existing pillars
5 Existing beams
6 Existing exterior wall structures
7 Existing ramen frame
8 Temporary frames
8a pillar
8b beam
9 concrete
10 Reinforcement frame
10a Reinforcement frame body
10b Support member
10c horizontal member
11 Existing Foundation
12 New structures
13 New Foundation
14 New pile
15 Foundation pile
16a 1st underground wall
16b Second underground wall
17 Foundation beam
18 New ground wall
19 Overhanging floor
19a Overhanging floor
20 Connecting member with pin roller bearing
21 Shaft member
22 Rotating member
23 Fixing member
24 Connecting members
25 Connecting members
26 Bracket
27 Cheek Staff
28 Joint plate

Claims (4)

Preservation of an existing outer wall structure that partially stores an existing outer wall structure that includes an existing outer wall that constitutes an existing structure and a pair of first existing pillars that are integrally erected on both sides of the existing outer wall. The method,
A pair of second existing pillars facing the back surface of the existing outer wall structure to be preserved and standing upright at a position facing the first existing pillars, and adjacent second existing pillars and second existing pillars. Dismantling the existing structure, leaving an existing ramen frame composed of a plurality of existing beams each connecting the column and the first existing column;
Next, a temporary frame that supports the existing external wall structure is built inside the existing ramen frame, and after the existing external wall structure is supported by the temporary frame,
A method of preserving an existing outer wall structure, comprising disassembling a ground portion and an existing beam of a second existing column forming a pair constituting the existing ramen frame. The method for preserving an existing outer wall structure according to claim 1,
After supporting the existing outer wall structure with the temporary frame, a reinforcing frame that stands independently is constructed between the temporary frame on the back side of the existing external wall structure, and the existing outer wall structure is mounted on the reinforcing frame. A first step of supporting;
Building a new foundation that supports a new structure that is built adjacent to the existing outer wall structure so as to reinforce the existing foundation that vertically supports the existing outer wall structure and integrate with the existing foundation. A second step of:
At the top of the new foundation, a new structure is constructed at least up to a level located at the same level as the height of the existing outer wall structure, and from the same level as the vicinity of the top of the reinforcing frame toward the reinforcing frame. Build an overhanging floor,
A third horizontally connecting the vicinity of the top of the reinforcing frame facing the new structure and the overhanging floor of the new structure using a connecting member with a pin roller support that is rotatable and horizontally movable. Process and
Disassembling and removing the temporary frame, constructing an overhanging floor projecting toward the reinforcing frame at each level of the new structure, and performing a fourth step of completing the new structure. How to save the body. The method for preserving an existing outer wall structure according to claim 2,
Reinforcement of the existing foundation carried out in the second step,
A pair of new piles is formed outside the area of the existing foundation that supported the existing ramen frame, in the vicinity of each side of a straight line connecting the legs of the first existing column and the second existing column, and facing each other. Along with
Constructing a first underground wall and a second underground wall so as to connect the adjacent second existing pillar legs, and connect the first existing pillar and the second existing pillar leg portions;
After connecting the new piles facing each other and constructing a foundation beam so as to be integral with the second underground wall,
A method for preserving an existing outer wall structure, wherein a new foundation is constructed so that the new pile becomes a part of the new foundation. The method for preserving an existing outer wall structure according to claim 2,
The connecting member with the pin roller bearing used in the third step is a fixing member made of a horizontal material capable of adjusting the rigidity in the vertical direction, and is disposed in parallel on the same plane as the fixing member. A round bar-shaped shaft member fixed to the fixing member via the shaft member, a rotating member penetrating through the shaft member and freely rotating in the circumferential direction, and freely moving in the longitudinal direction; It has a bracket protruding in a direction perpendicular to the shaft member,
After fastening the fixing member horizontally at a height position near the top of the reinforcing frame facing the new structure and at the same level as the overhanging floor of the new structure via a fastening means,
A method for preserving an existing outer wall structure, wherein the bracket is fastened to an overhanging floor of the new structure located at the same height via a fastening means after performing level adjustment.

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