JP7175725B2 - Reinforcing structure of masonry building - Google Patents

Description

TECHNICAL FIELD The present invention relates to reinforcement of structures, and more particularly to a structure suitable for reinforcement of masonry buildings mainly composed of bricks, blocks, or the like.

Historical masonry structures, such as brick buildings built after the Meiji period, may be preserved as cultural assets or renovated for new uses. However, according to the current seismic resistance standards, many masonry buildings are judged to be unsuitable for existing buildings, so it is necessary to reinforce the brick walls to increase their strength in order to reuse them.

In Patent Document 1, in order to increase the strength and toughness of an existing masonry building, tension is applied to a steel bar that penetrates the wall section from above and the lower end is grouted into the ground. It has been proposed to apply compressive forces to the masonry wall to increase its resistance to shear and out-of-plane bending.

Moreover, in Patent Documents 2 and 3, a through hole is formed between the upper end and the lower end of a brick wall, and a plurality of PC steel rods inserted through the through hole are tensioned from the upper part of the wall body, thereby forming a brick wall. Reinforcement methods have been proposed that apply a compressive force between the upper and lower ends. Here, after attaching a fixing plate to the lower end of the PC steel rod through the horizontal hole formed in the foundation of the existing brick wall, the horizontal hole is filled with high-early-strength concrete, and after this hardens, the PC steel rod is fixed by tension. is doing.

JP-A-54-010514 JP 2010-281033 A JP 2010-281034 A

It is believed that the strength of the brick wall can be increased by using the technique disclosed in the above patent document. However, in the reinforcing method of Patent Document 1, the lower end of the steel rod that penetrates the foundation is fixed in the ground by grout injected from the upper part of the through hole formed in the masonry wall or the opening of the pipe separately inserted into the ground. will do. Therefore, it is very difficult to attach a lower fixing portion that functions as a fixing end to the lower end of the tendon, and there is a limit to the fixing strength for fixing the lower end of the tendon. Therefore, a large tension force cannot be applied to the tendon, and a dramatic improvement in the seismic performance of the masonry wall cannot be expected.

In addition, in the reinforcement methods of Patent Documents 2 and 3, since the horizontal hole formed by cutting the foundation concrete of the masonry wall is filled with filler, depending on the material used and the filling situation, this part may be structurally It can be a weak point. Furthermore, since the fixed part of the lower end of the tendon is buried, it is not possible to monitor the change in tension, and even if the creep of the wall joint progresses and the tension decreases, it is not possible to re-tension it. can't

SUMMARY OF THE INVENTION Accordingly, it is an object of the present invention to provide a reinforcing structure for a masonry building in which cut portions for reinforcement are less likely to become structural defects and which can cope with changes in tension over time.

A reinforcing structure for a masonry building according to the present invention for achieving the above object is a reinforcing structure for a masonry building in which prestress is applied by tendons inserted through vertical holes formed by cutting a wall. A base located in the lower part of the wall body or a hollow portion provided by cutting a lower wall surface of the wall body, and an reinforcing body installed in the hollow part, is provided with a space and a flange plate positioned in contact with the inner wall of the reinforcing body, and the lower fixing portion of the tendon is fixed to the reinforcing body via the flange plate. , wherein the upper fixing portion of the tendon is fixed to the upper surface of the wall.

A reinforcing structure for a masonry building according to the present invention for achieving the above object is a masonry building in which prestress is applied by tendons inserted through vertical holes formed by cutting a wall. A reinforcing structure, comprising: a hollow portion provided by cutting an upper wall surface of the wall body, a foundation positioned in a lower portion of the wall body, or a lower wall surface of the wall body; and reinforcement installed in the hollow portion A space is provided inside the augmenting body, and a flange plate positioned in contact with the inner wall of the augmenting body is provided. It can also be characterized in that the anchoring portion of the tendon is fixed.

Further, in the reinforcement structure of the masonry building having the characteristics as described above, the reinforcing body is a cylindrical steel pipe or a U-shaped concrete member. With such characteristics, the augmenting body can be used as a general-purpose product, and construction costs can be reduced.

Further, in the reinforcing structure of the masonry building having the characteristics as described above, the reinforcing body is in contact with the foundation and/or the wall via mortar. With such characteristics, the reinforcing body can be firmly fixed to the foundation or the wall. Therefore, it is possible to suppress a decrease in the strength of the cut portion of the foundation or wall.

Furthermore, in the masonry building reinforcement structure characterized as described above, the space left inside said augmentation body is provided with measuring means for measuring tension and/or re-tensioning means. . By having such characteristics, it is possible to know the change in the tension state over time as a numerical value.

According to the reinforcing structure of the masonry building having the above characteristics, the reinforcing body is installed in the hollow part formed by cutting the foundation concrete of the wall, and the fixing part of the tendon is fixed to this reinforcing body. Therefore, the tension force can be reliably transmitted to the foundation and the wall. In addition, when placing a steel or reinforced concrete reinforcing body in the drilled part, it is fixed with mortar or adhesive intervening, so it is possible to integrate it reliably, so this part is structurally Hardly a drawback. Furthermore, since the fixed part of the tendon is not embedded with the filler, the actually introduced tension can be monitored with a gauge or measuring instrument, and the tension can be re-tensioned when the tension decreases. It is possible to reliably improve the seismic performance of masonry buildings in response to changes over time.

It is the perspective view which showed the cross section for demonstrating the structure and reinforcement structure of a brick wall. It is a figure which shows the structure of the wall surface side cross section of the brick wall which concerns on 1st Embodiment. FIG. 4 is a perspective view for explaining the form of a cylindrical body that constitutes the augmenting body; It is a figure which shows the structure of the wall surface side cross section of the brick wall which concerns on 2nd Embodiment. FIG. 2 is an enlarged view showing a cross-sectional structure of an unbonded PC stranded wire that can be used as a tendon. It is a figure which shows the cross-sectional structure of the horizontal hole formation part in the brick wall which concerns on 3rd Embodiment. It is a figure which shows the cross-section of the brick wall which concerns on 4th Embodiment. FIG. 10 is a diagram showing an example of a configuration other than a cylindrical steel pipe for the reinforcing body; FIG. 10 is a diagram showing an example of applying a precast material to the cored portion of the foundation; It is a figure which shows the structural example of the reinforcement body in the case of giving re-tension force to a tendon using a jack.

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of a reinforcing structure for a masonry building according to the present invention will be described below in detail with reference to the drawings.

[First embodiment]
First, referring to FIGS. 1 to 3, a reinforcing structure for a masonry building according to the first embodiment will be described. In the drawings, FIG. 1 is a perspective view showing a cross section for explaining the structure and reinforcement structure of the brick wall, and FIG. Furthermore, FIG. 3 is a perspective view for explaining the form of a tubular body that constitutes the augmenting body.

A masonry building to be reinforced by the reinforcing structure according to this embodiment is, for example, a building having a brick wall 50 as shown in FIG. Examples of buildings having such brick walls 50 include Western-style buildings built after the Meiji period. As the laying method of the bricks 52 constituting the brick wall 50, long laying, small laying, English laying, and French laying are known, but any laying method of the brick wall can be applied. . The example shown in FIG. 1 shows an English masonry brick wall 50, which is one of the most existing masonry buildings.

Such a brick wall 50 is generally built up on a foundation 54, and struts (not shown) are arranged in pairs along the wall surface. The upper end portion is held down by the circumferential girders (hereinafter referred to as existing circumferential girders 56) that span between the columns, thereby improving the resistance to horizontal force.

[Outline of reinforcement structure]
In the reinforcing structure according to the present embodiment, a through-hole 12 is formed from the upper end of the wall body (a brick wall 50 as an example) to the foundation 54, and the tendon 14 is inserted through the through-hole 12. , apply a compressive force (prestress) to the brick wall 50 via the tendon 14 . Specifically, the configuration is as follows.

[Through hole/horizontal hole]
First, the through-holes 12 are provided along the erecting direction of the brick wall 50 inside the brick wall 50 and the foundation 54 on which the brick wall 50 is erected. The formation position of the through-hole 12 depends on the size and thickness of the brick wall 50. For example, as shown in FIG. For this purpose, it is preferable to provide the through holes 12 line-symmetrically with the existing circumferential girders 56 as a base point. By arranging the through-holes 12 in this way, it is possible to balance the compressive force applied in the thickness direction of the brick wall 50 when tension is applied to the tendon 14 . The through-holes may be arranged with appropriate intervals in the direction along the wall surface.

The formation of the through hole 12 is performed after exposing the foundation 54 that is buried in the ground or partially exposed and forming the lateral hole 20 in the side surface of the foundation 54 . That is, through hole 12 is formed between the upper end of brick wall 50 and lateral hole 20 . Here, it is desirable to adopt a waterless construction method for forming the through holes 12 and the lateral holes 20 . The waterless construction method is a construction method in which cooling water is not used during cutting and drilling, and cooling gas is sprayed on the cutting and drilling portions during processing. By using the waterless construction method, the inside of the brick wall 50 and the inside of the joints are not wetted with water, and adverse effects due to infiltration can be prevented. In addition, scattering of dust can also be prevented by collecting dust by curing the cutting and drilling parts during the waterless construction method. The horizontal hole 20 may have a bottom, and is preferably formed so as to have an opening inside the building. This is to prevent the appearance of the building from changing.

[Strand]
The tendon 14 may be a bar-shaped member such as a PC steel bar. The prestressing tendon 14 is passed from the upper end of the brick wall 50 to the lateral hole 20 . When a PC steel bar is used as the prestressing tendon 14, a plurality of PC steel bars may be connected via a coupler 16 as shown in FIG. 2 to ensure a desired length. An upper fixing portion 18a and a lower fixing portion 18b are provided at the upper end portion and the lower end portion of the tendon 14 arranged in the through hole 12, respectively.

A lower fixing portion 18 b , which is a fixing portion on the lower end side of the tendon 14 , is provided inside the lateral hole 20 . Here, in the lateral hole 20, a reinforcing body 22 is arranged to prevent the tendon 14 from coming off and to improve the strength of the lateral hole 20. As shown in FIG. As shown in FIG. 3, for example, the reinforcing body 22 can be composed of a tubular body 24 having a disc-shaped steel plate 24b at one end of a cylindrical steel pipe 24a, a flange plate 26, and a support plate 28. . Specifically, the steel pipe 24a may be a pipe having a diameter that fits within the diameter of the lateral hole 20, and is provided with a steel plate 24b serving as an end plate at the end on the insertion side of the lateral hole 20. As shown in FIG. The flange plate 26 is a plate member for preventing the tendon 14 inserted into the lateral hole 20 through the through hole 12 from coming off, and there is no risk of bending or breakage when a tensile force is applied to the tendon 14. Any thickness may be used, and the specific thickness may be determined based on the designed tensile strength. The tendon 14 can be prevented from coming off by providing the lower fixing portion 18b for inserting the tendon 14 into the flange plate 26 and fixing it with a nut or the like. Further, the support plate 28 is a plate material that positions the flange plate 26 arranged inside the steel pipe 24a. Although its specific configuration and arrangement are not limited, in the example shown in FIGS. It is designed to have a triangular shape.

After the reinforcing body 22 having such a configuration is loaded into the lateral hole 20, it is fixed with a grout material 34 such as mortar, so that the strength of the foundation 54 forming the lateral hole 20 can be ensured. Here, the tendon 14 that is exposed inside the lateral hole 20 in which the reinforcing body 22 is arranged is preferably provided with a measuring means 30 such as a strain gauge capable of measuring tension. This is because it is possible to grasp the decrease in tension over time.

The upper fixing portion 18a, which is the fixing portion on the upper end portion side, is formed by arranging a new circumferential girders (hereinafter referred to as new circumferential girders 32) along the existing circumferential girders 56 at the upper end of the brick wall 50. The tendons 14 can be fixed using the circumferential girders 32 as a base point. With such a configuration, by applying a tensile force to the tendon 14, a compressive force applied to the brick wall 50 also acts in the wall direction. Thereby, there can exist a reinforcement effect with respect to the brick wall 50 whole.

Here, the configuration of the new circumferential girders 32 is not particularly limited, but for example, channel steel as shown in FIGS. 1 and 2 can be used. The tendon 14 is arranged so as to pass through the upper and lower flanges (upper flange 32a, lower flange 32b) constituting the channel steel, and the upper fixing portion 18a is fixed by fixing the upper end of the tendon 14 protruding from the upper flange 32a. and should be. When the tendon 14 is a PC steel rod, the upper fixing portion 18a may be formed by screwing a nut or the like onto the upper end protruding from the upper flange 32a in the same manner as the lower fixing portion 18b.

[Action/effect]
A tension applying device (not shown) is installed at the upper end or the lower end of the tendon 14 arranged in such a state, and by applying tension to the tendon 14, the brick wall 50 is formed with a new circumferential girder 32 A compressive force (prestress) is applied via When a compressive force is applied to the brick wall 50 , the frictional force acting on the interface between the bricks being laid, that is, the interface with the joint material is increased, and the in-plane deformation of the brick wall 50 is suppressed. As a result, the load transmission (shear force transmission) performance in the in-plane direction is improved, and the seismic resistance against so-called rolling can be improved.

In addition, in the reinforcement structure of the masonry building according to the present embodiment, tension force is applied to the tendon 14 in a state in which the horizontal hole 20 provided in the foundation is not closed and the space is left as it is. Therefore, when the creep of the joint progresses and the tension decreases, the lateral hole 20 (actually, the reinforcing body arranged in the lateral hole 20) in which the lower end of the tendon 14 is exposed By tightening the lower fixing portion 18b having a nut or the like through the , tension force can be applied to the tendon 14 again. This makes it possible to apply a new compressive force to the brick wall 50, which is required to improve the earthquake resistance.

In this embodiment, it is described that the new circumferential girders 32 are arranged along the existing circumferential girders 56 . However, if the existing circumferential girders 56 cover the upper end of the brick wall 50 , the through holes 12 may penetrate through the existing circumferential girders 56 as well. In the case of such a structure, the placement of the new circumferential girders 32 can be omitted.

[Second embodiment]
Next, a reinforcing structure for a masonry building according to a second embodiment will be described with reference to FIGS. 4 and 5. FIG. FIG. 4 is a view showing the structure of a wall surface side cross-section of a brick wall, and FIG. 5 is an enlarged view showing a cross-sectional structure of an unbonded PC stranded wire that can be used as tendons.

In the reinforcing structure of the masonry building according to the present embodiment, unbonded PC steel or unbonded PC steel stranded wire is adopted as the tendon 14, and the through hole 12 through which the tendon 14 is inserted and the tendon 14 It is characterized by filling the gap with a ground material 36 such as mortar.

Here, the unbonded PC steel stranded wire as an example of the tendon 14 has a stranded wire 14b made of PC steel arranged inside a coated portion 14a made of polyethylene, as shown in FIG. Grease 14c is filled between the portion 14a and the stranded wire 14b. Therefore, it is possible to move only the stranded wire 14b arranged inside while the covering portion 14a is fixed.

Therefore, even if the through hole 12 is filled with the grout material 36 and the covering portion 14a of the tendon 14 is fixed, tension can be applied again by pulling the twisted wire 14b. Further, by filling the through holes 12 with the ground material 36, the strength of the brick wall 50 itself can be improved.

[Third embodiment]
Next, a reinforcement structure for a masonry building according to a third embodiment will be described with reference to FIG. In addition, FIG. 6 is a figure which shows the cross-sectional structure of the horizontal hole formation part in a brick wall. In the reinforcement structure of the masonry building according to the first and second embodiments described above, the upper end of the tendon 14 is exposed above the brick wall 50, and the lower end forms the horizontal hole 20 in the foundation 54, It is described that the lateral hole 20 is exposed.

However, if it is structurally difficult to expose the foundation 54 or open the upper end of the brick wall 50, the inner side surface of the brick wall 50 is cored to form a horizontal hole 22 as shown in FIG. , the lateral hole 20 may be used as the end exposed portion of the tendon 14 . The depth of the lateral hole 20 depends on the thickness of the brick wall 50, but it is sufficient to excavate such that the thickness D with respect to the outer side surface is about 100 mm, for example. This is because, if the remaining thickness D is about 100 mm, the external appearance of the building having the brick wall 50 is not affected, and there is no danger of water infiltration due to rain or the like.

In the horizontal hole 20 formed in the brick wall 50, a cylindrical state 24 as a reinforcing body 22 is inserted in the same manner as the horizontal hole 20 formed in the foundation 54. As shown in FIG. A grout material 34 is filled between the tubular state 24 and the lateral hole 20 to integrate them. When adopting such a construction method, it is desirable to employ the following structure with the horizontal hole 20 as a base point. That is, when the horizontal hole 20 is formed in the wall surface on the upper end side of the tendon 14 , it is preferable to provide an anchor (not shown) to the existing circumferential beam 56 arranged at the upper end of the brick wall 50 . On the other hand, when the lateral hole 20 is formed on the lower end side of the wall surface, an anchor is provided to the foundation 54. As shown in FIG. Each anchor is fixed to a steel pipe 24 a arranged in the lateral hole 20 .

With such a configuration, the tension applied to the tendons 14 is transmitted to the circumferential girders and the foundation via the anchors. This is because it is possible to apply a compressive force to the entire wall surface. In this embodiment, an example in which the horizontal hole 20 is formed on the lower end side of the brick wall 50 is shown, but the horizontal hole 20 may be formed on the upper end side of the brick wall 50 .

[Fourth embodiment]
Next, a reinforcement structure for a masonry building according to a fourth embodiment will be described with reference to FIG. In the example shown in FIG. 7, a cutting portion 40 is provided on the upper side of the brick wall 50, that is, on the upper wall surface, and the tendons 14 are inserted into the lateral holes 20 provided in the foundation 54. FIG.

This embodiment is effective when there is a reason such as the roof cannot be collapsed or the upper part of the brick wall 50 cannot be opened. Specifically, a cut portion 40 is formed in the inner upper wall surface of the brick wall 50 , and a through hole 12 for inserting the tendon 14 is formed through the cut portion 40 . Although the specific form of the cutting part 40 does not matter, it is sufficient if at least the through hole 12 is formed and the tendon 14 can be inserted through the through hole 12. Desirably, the tendon 14 has a tension force. It is preferable that a space capable of arranging the tension jack 58 for applying the tension can be secured.

After providing the cut portion 40 on the upper wall surface of the brick wall 50 , the through hole 12 is formed from the bottom surface of the cut portion 40 toward the horizontal hole 20 formed in the foundation 54 . Incidentally, in the lateral hole 20, the reinforcing body 22 is arranged in the same manner as in the above-described embodiment. After forming the through hole 12 , the tendon 14 is inserted through the through hole 12 via the cut portion 40 . Here, as the tendon 14, it is desirable to use the unbonded PC stranded wire described in the second embodiment. This is because the unbonded PC stranded wire is capable of exhibiting a bend peculiar to the cable, so that it can be applied to a narrow space in which a PC steel bar cannot be arranged.

After inserting the tendon 14, the lower end portion of the tendon 14 is fixed to the reinforcing body 22 via the lower fixing portion 18b. An upper fixing portion 18a is arranged on the upper end side of the tendon 14 provided in the cutting portion 40, and a tensioning force is applied to the tendon 14 by a tensioning means such as a tensioning jack 58 or the like. By such action, prestress can be applied to the brick wall 50 in the same manner as in the above-described embodiment.

As described above, according to the reinforcing structure of the masonry building according to the present embodiment, the brick wall 50 can be reinforced without dismantling or removing the structure located above the brick wall 50, such as the roof. becomes possible. In addition, when it is desired to reduce the chipping range (cutting range) in order to secure the strength of the brick wall 50, as indicated by the two-dot chain lines in FIGS. A slope may be provided to lower the ceiling surface toward the back side. This is because even if the cut portion 40 has such a trapezoidal cross section, if the tendon 14 is a cable type such as an unbonded PC stranded wire, it does not affect its insertion. Also, when the cross-sectional form of the cutting portion 40 is trapezoidal as shown in FIGS. . This is because the tension jacks 58 can be installed in an inclined state, so that the tension jacks 58 can be prevented from coming into contact with the ceiling surface.

[Modification]
In each of the above embodiments, the augmentation body 22 has been described as being a cylindrical steel pipe. However, the augmentation body may have a form capable of exhibiting a support effect against the tension force. For this reason, for example, as shown in FIG. 8, the reinforcing body 22 has a configuration in which the arc portion of the steel pipe 24a is provided only on the surface that is pressed against the lateral hole 20 when tension is applied to the tendon 14, and the arc portion It is good also as a structure provided with the flange plate 26 so that a string may be stretched.

Further, in the above-described embodiment, the coring of the lateral hole 20 is always shown to be circular. However, the coring of the lateral hole 20 may be rectangular as shown in FIG. In this case, a U-shaped precast material 38 may be arranged in the core-extracted portion. When the coring part is rectangular, the surface from which the tendon 14 protrudes can be a flat surface. Therefore, the flange plate 26 can be arranged directly on the projecting surface of the tendon 14 .

Moreover, in the above embodiment, the through holes are formed in the vertical direction with respect to the brick wall. However, the purpose of the reinforcing structure is to apply a compressive force to the brick wall 50 through the tendon 14 . Therefore, the through-hole may be formed at an angle with respect to the vertical direction, that is, formed obliquely. This is because even with such a structure, a compressive force can be applied to the brick wall 50 through the tendon 14 .

In the above embodiment, re-applying tension to the tendon 14 (hereinafter referred to as re-tensioning) is performed by manually tightening a nut or the like as the lower fixing portion 18b provided inside the reinforcing body 22. It was described that it can be obtained by However, as shown in FIG. 10, the tendon 14 may be re-tensioned using a jack 42 as a re-tensioning means. More specifically, it may be as shown in FIG. That is, the reinforcing body 22 is provided with a fixed flange 26a and a movable flange 26b, and each flange is provided with a fixing portion (first lower fixing portion 18b1, second lower fixing portion 18b2) for the tendon 14. . The second lower fixing portion 18b2 provided on the side of the fixing flange 26a may preferably be prevented from loosening by means such as a double nut.

A jack 42 (eg, a hydraulic jack) is positioned between the fixed flange 26a and the movable flange 26b. Here, the jacks 42 are arranged in line-symmetrical or point-symmetrical arrangement with the tendons 14 interposed therebetween. This is to keep the balance when tension is applied. In the example shown in FIG. 10, the jack 42 is installed by placing the jack body (cylinder) on the movable flange 26b side and pressing the piston against the fixed flange 26a in order to stabilize the installation. .

After arranging the jack 42 as described above, the jack 42 is operated to widen the space between the fixed flange 26a and the movable flange 26b. As a result, the second lower fixing portion 18b2 is separated from the fixing flange 26a, and the tendon 14 is re-tensioned. When the second lower fixing portion 18b2 is moved toward the fixing flange 26a and fixed while the tendon 14 is re-tensioned, the tendon 14 can be tensioned even after the operation of the jack 42 is stopped. can be kept in a flat state (a state in which the brick wall 50 is prestressed). In this way, by using the jack 42 for re-tensioning, it is possible to re-tension the tendon 14 more easily and reliably than manually.

Here, the stationary tension applied to the tendon 14 can be detected through the measuring means 30 such as a strain gauge, as described above. In addition, when re-tensioning force is applied periodically or when it is desired to directly detect the applied load, for example, a measuring means such as a load cell 30a or a hydraulic gauge (not shown) is attached to the movable flange 26b. It may be provided in the lower fixing portion 18b1. When the load cell 30a or the oil pressure gauge is installed, it becomes possible to directly know the load applied at the time of re-tensioning. As an example of the layout of the measuring means 30a, as shown in FIG. 10, there is a space between a washer that receives the pressing force from the movable flange 26b and a nut that suppresses the movement of the movable flange 26b via the washer. be able to.

12 Through hole 14 Tendon 14a Coating portion 14b Twisted wire 14c Grease 16 Coupler 18a Upper fixing portion 18b ……lower fixing portion 18b1……first lower fixing portion 18b2……second lower fixing portion 20……horizontal hole 22……reinforcing body 24……cylindrical body 24a Steel pipe 24b Steel plate 26 Flange plate 26a Fixed flange 26b Movable flange 28 Support plate 30 Measuring means 30a ……Load cell, 32……New circumferential beam, 32a……Upper flange, 32b……Lower flange, 34……Grout material, 36……Grout material, 38……Precast material, 40…… ...Cutting part, 42...Jack, 50...Brick wall, 52...Brick, 54...Foundation, 56...Existing girder, 58...Tension jack.

Claims (4)

A reinforcing structure for a masonry building in which prestress is applied by tendons inserted through vertical holes formed by cutting a wall body,
a hollow portion provided by cutting a foundation located in the lower part of the wall or a lower wall surface of the wall;
having an augmentation body installed in the cavity;
A space is left inside the augmenting body, and a flange plate is provided which is positioned in contact with the inner wall of the augmenting body. A reinforcement structure for a masonry building, characterized in that an anchoring part is fixed, and an upper anchoring part of the tendon is fixed to the upper surface of the wall. A reinforcement structure for a masonry building in which prestress is applied by tendons inserted through vertical holes formed by cutting a wall body,
a hollow portion provided by cutting an upper wall surface of the wall body and a foundation positioned at a lower portion of the wall body, or a lower wall surface of the wall body;
having an augmentation body installed in the cavity;
A space is provided inside the reinforcing body, and a flange plate is provided in contact with the inner wall of the reinforcing body. A reinforcing structure for a masonry building, characterized in that the is fixed. The reinforcing body is a cylindrical steel pipe or a U-shaped concrete member, and the reinforcing body is in contact with the foundation and/or the wall via mortar. Or the reinforcing structure of the masonry building according to 2. 4. According to any one of claims 1 to 3 , characterized in that the space located inside the augmentation body is provided with measuring means for measuring tension and/or re-tensioning means. Reinforcing structure of the masonry building described.

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