JP2020084429A - Reinforcing structure of masonry building - Google Patents

Abstract

To provide the reinforcing structure of a masonry building causing little structural defect by cutting parts for reinforcement, and capable of coping with secular change of a tensioning force.SOLUTION: The reinforcing structure of a masonry building is applied with prestress by tendons 14 inserted into through-holes 12 formed by cutting a brick wall 50, and has a cave hole 20 formed by cutting foundation 54 positioned at a lower part of the brick wall 50 and a reinforcing body 22 installed in the cave hole 20. A space is kept inside the reinforcing body 22, and lower side settling parts 18b of the tendons 14 are fixed to the reinforcing body 22, and upper side settling parts 18a of the tendons 14 are fixed to an upper face of the brick wall 50.SELECTED DRAWING: Figure 1

Description

The present invention relates to reinforcement of a structure, and particularly to a structure suitable for reinforcement of a masonry building mainly composed of bricks and blocks.

Historical masonry structures represented by brick buildings built after the Meiji era may be preserved as cultural properties or refurbished for new purposes. However, if the current seismic standards are followed, many masonry buildings will be diagnosed as ineligible, so it is necessary to strengthen the brick walls by seismic reinforcement to reuse them.

In Patent Document 1, in order to enhance the yield strength and toughness of an existing masonry building, a tensile force is applied to a steel rod whose lower end portion is grout-fixed in the ground through the cross section of the wall body from above. Therefore, a method of applying a compressive force to increase the shear resistance of the masonry wall body and the resistance to out-of-plane bending has been proposed.

Further, in Patent Documents 2 and 3, a through hole is formed between an upper end and a lower end of a brick wall, and a plurality of PC steel rods inserted into the through hole are tensioned from the upper portion of the wall body to thereby remove the brick wall. A reinforcement method has been proposed in which a compressive force is applied between the upper end and the lower end. Here, after attaching the fixing plate to the lower end part of the PC steel rod from the horizontal hole formed in the foundation part of the existing brick wall, the horizontal hole is filled with high-strength concrete, and after this is hardened, the PC steel rod is tensioned and fixed. is doing.

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

It is considered that the proof stress of the brick wall can be certainly 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 penetrating the foundation is fixed in the ground by the 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 be done. Therefore, it is very difficult to attach the lower fixing portion that functions as a fixed end to the lower end portion of the tension member, and the fixing strength for fixing the lower end portion of the tension member is also limited. Therefore, a large tension cannot be applied to the tension member, and a dramatic improvement in the earthquake resistance of the masonry wall cannot be expected.

Further, in the reinforcing methods of Patent Document 2 and Patent Document 3, since the horizontal hole formed by cutting the basic concrete of the masonry wall is filled with the filler, this portion is structurally different depending on the material used and the filling condition. May be a weakness. Furthermore, since the fixed part at the lower end of the tension member is buried, it is not possible to monitor the fluctuation of the tension force, and even if the tension in the joint of the wall progresses and the tension force decreases, re-tension is required. I can't.

Therefore, it is an object of the present invention to provide a reinforcing structure for a masonry building, in which the cutting portion for reinforcement does not easily become a structural defect and can cope with changes over time in tension.

The reinforcing structure of a masonry building according to the present invention for achieving the above object is a reinforcing structure of a masonry building in which prestress is applied by a tension material inserted into a vertical hole formed by cutting a wall body. The base located at the bottom of the wall body, or a cavity provided by cutting the lower wall surface of the wall body, and an enhancer installed in the cavity, the inside of the enhancer In the space, the lower fixing portion of the tension member is fixed to the augment, and the upper fixing portion of the tension member is fixed to the upper surface of the wall body. To do.

Further, the reinforcing structure of a masonry building according to the present invention for achieving the above object is a masonry building to which prestress is applied by a tension material inserted into a vertical hole formed by cutting a wall body. Reinforcement structure, a cavity located by cutting the upper wall surface of the wall body and a lower portion of the wall body, or a lower wall surface of the wall body, and a reinforcement installed in the cavity portion It is also possible to have a body, and a space is left inside the strengthening body, and the fixing portion of the tension member is fixed to the strengthening body.

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

In addition, in the reinforcing structure of the masonry building having the above-mentioned features, the reinforcing body is in contact with the foundation and/or the wall body via mortar. With such a feature, the strengthening body can be firmly fixed to the foundation or the wall body. For this reason, it is possible to suppress a decrease in strength of the cut portion of the foundation or the wall body.

Further, in the reinforcing structure of a masonry building having the above-mentioned features, the steel pipe has a steel plate on one end surface. By having such characteristics, the strength of the enhancer can be increased.

Further, in the reinforcing structure of the masonry building having the above-mentioned characteristics, the space existing inside the augmenting body is provided with a measuring unit for measuring a tension force and/or a re-tensioning unit. .. By having such characteristics, it is possible to know the change over time in the tension state as a numerical value.

According to the reinforced structure of the masonry building having the above characteristics, the reinforcement body is installed in the cavity provided by cutting the basic concrete of the wall body, and the fixing portion of the tension material is fixed to the reinforcement body. Therefore, tension can be reliably transmitted to the foundation and the wall. Also, when arranging a steel or reinforced concrete reinforcement in the drilled part, it is fixed with a mortar or adhesive intervening, so reliable integration is possible, so this part is structurally Hard to be a drawback. In addition, since the fixed part of the tension material is not buried in the filling material, the tension force that was actually introduced can be monitored with a gauge or measuring instrument, and when the tension force decreases, it can be re-tensioned. 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 of a brick wall, and a reinforcement structure. It is a figure which shows the structure of the wall surface side cross section of the brick wall which concerns on 1st Embodiment. It is a perspective view for demonstrating the form of the cylindrical body which comprises an augmentation 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. It is an enlarged view which shows the cross-section of the unbonded PC strand which can be employ|adopted as a tension material. It is a figure which shows the cross-section 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. It is a figure which shows the example at the time of making a reinforcement body into a structure other than a cylindrical steel pipe. It is a figure which shows the example at the time of adapting a precast material to the core removal part with respect to a foundation. It is a figure which shows the structural example of a reinforcement body in the case of giving a re-tensioning force to a tension member using a jack.

Hereinafter, an embodiment of a reinforcing structure for a masonry building of the present invention will be described in detail with reference to the drawings.

[First Embodiment]
First, the reinforcing structure of a masonry building according to the first embodiment will be described with reference to FIGS. 1 to 3. In the drawings, FIG. 1 is a perspective view showing a cross section for explaining a brick wall structure and a reinforcing structure, and FIG. 2 is a diagram showing a wall surface cross section structure of the brick wall. Further, FIG. 3 is a perspective view for explaining the form of the tubular body forming the augment body.

The masonry building to be reinforced by the reinforcing structure according to the present embodiment is a building having a brick wall 50 as shown in FIG. 1, for example. As a building having such a brick wall 50, a Western-style building constructed after the Meiji era can be cited. As a method of stacking the bricks 52 that form the brick wall 50, a longitudinal product, a small product, an English product, a French product, and the like are known, but a brick wall of any stacking method can be applied. .. The example shown in FIG. 1 shows a brick wall 50 made of British products, which has many existing masonry buildings.

Such a brick wall 50 is generally stacked on a foundation 54, and struts (not shown) are arranged in pairs along the wall surface. Further, since the upper end portion is suppressed by the gaze beam (hereinafter, referred to as an existing gaze beam 56) that is bridged between the columns, the proof stress against the horizontal force is improved.

[Outline of reinforcing structure]
The reinforcing structure according to the present embodiment forms the through hole 12 from the upper end of the wall body (brick wall 50 as an example) having such a configuration to the foundation 54, and then inserts the tension member 14 into the through hole 12. A force in the compression direction (prestress) is applied to the brick wall 50 via the tension member 14. Specifically, it has the following configuration.

[Through hole/Horizontal hole]
First, the through hole 12 is provided inside the brick wall 50 and the foundation 54 on which the brick wall 50 is erected, along the standing direction of the brick wall 50. Although the formation position of the through hole 12 depends on the scale and thickness of the brick wall 50, for example, as shown in FIG. 1, when the existing girder 56 is arranged in the central portion in the thickness direction of the brick wall 50, In addition, it is preferable that the through holes 12 are provided in line symmetry with the existing girder 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 tension member 14. The through holes in the direction along the wall surface may be arranged at appropriate intervals.

The formation of the through hole 12 is performed after exposing the foundation 54 which is buried in the ground or partially exposed, and forming the lateral hole 20 on the side surface of the foundation 54. That is, the through hole 12 is formed between the upper end of the brick wall 50 and the lateral hole 20. Here, it is desirable to adopt an anhydrous method for forming the through hole 12 and the lateral hole 20. The anhydrous construction method is a construction method in which cooling water is not used at the time of cutting and boring, and processing is performed while blowing a cooling gas to the cutting and boring portions. By using the anhydrous method, the inside of the brick wall 50 and the inside of the joint are not wetted with water, and the adverse effect of infiltration can be prevented. Further, it is possible to prevent scattering of dust by curing the cutting and perforating portions and collecting dust during the anhydrous method. The lateral hole 20 may have a bottom, and preferably, it may be formed so as to have an opening inside the building. This is to prevent the appearance of the building from changing.

[Tension material]
The tension member 14 may be a rod-shaped member such as a PC steel rod. The tension member 14 is inserted from the upper end of the brick wall 50 to the lateral hole 20. When a PC steel rod is used as the tension member 14, a plurality of PC steel rods may be connected via a coupler 16 as shown in FIG. 2 to secure 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 tension member 14 arranged in the through hole 12, respectively.

The lower fixing portion 18b, which is the fixing portion on the lower end side of the tension member 14, is provided inside the lateral hole 20. Here, in the lateral hole 20, a strengthening body 22 is arranged to prevent the tension member 14 from coming off and improve the strength of the lateral hole 20. As the augmentation body 22, for example, as shown in FIG. 3, it can be configured by a cylindrical body 24 having a disk-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 a steel plate 24b serving as an end plate is provided at the end portion on the insertion side into the lateral hole 20. The flange plate 26 is a plate member for preventing the tension member 14 inserted into the lateral hole 20 through the through hole 12 from coming off, and there is no fear of bending or damage when the tension member 14 is applied with a pulling force. Any material having a thickness may be used, and a specific thickness may be determined based on the designed tensile strength. By providing the lower fixing portion 18b in which the tension member 14 is inserted through the flange plate 26 and fixed by a nut or the like, the tension member 14 can be prevented from coming off. The support plate 28 is a plate member that positions the flange plate 26 arranged inside the steel pipe 24a. The specific configuration and arrangement are not limited, but in the example shown in FIGS. 1 and 2, the flange plate 26 and the support plate 28 are configured with the vicinity of the insertion portion of the tension member 14 through the through hole 12 as a starting point. The shape is a triangle.

After the reinforcing body 22 having such a configuration is loaded in the lateral hole 20, the strength of the foundation 54 forming the lateral hole 20 can be ensured by fixing it with the grout material 34 such as mortar. Here, it is preferable that the tension member 14 exposed inside the lateral hole 20 in which the strengthening body 22 is arranged is provided with a measuring means 30 such as a strain gauge capable of measuring the tension force. This is because it is possible to understand when the tension has decreased over time.

The upper fixing portion 18a, which is the fixing portion on the upper end side, is provided with a new girder (hereinafter referred to as a new girder 32) along the existing girder 56 at the upper end of the brick wall 50, and then, with this new installation. The tension member 14 may be fixed with the girder 32 as a base point. With such a configuration, the compressive force applied to the brick wall 50 by applying a tensile force to the tension member 14 also acts in the wall surface direction. As a result, it is possible to exert a reinforcing effect on the entire brick wall 50.

Here, the structure of the new girder 32 is not particularly limited, but can be, for example, channel steel as shown in FIGS. 1 and 2. The tension member 14 is arranged so as to penetrate through the upper and lower flanges (the upper flange 32a and the lower flange 32b) forming the channel steel, and the upper end of the tension member 14 protruding from the upper flange 32a is fixed to fix the upper fixing portion 18a. It should be done. When the tension member 14 is a PC steel rod, the upper fixing portion 18a may be configured by screwing a nut or the like to the upper end portion projecting from the upper flange 32a similarly to the lower fixing portion 18b.

[Action/effect]
A tension force applying device (not shown) is installed at the upper end or the lower end of the tension member 14 arranged in such a state, and the tension force is applied to the tension member 14, so that the brick wall 50 has the new girder 32. A compressive force (prestress) is applied through the. When a compressive force is applied to the brick wall 50, the frictional force that acts between the bricks that have been laid up, that is, the interface with the joint material is improved, and the in-plane deformation of the brick wall 50 is suppressed. Thereby, the load transmission (shear force transmission) performance in the in-plane direction is improved, and so-called seismic resistance against rolling can be improved.

Further, in the reinforcing structure of the masonry building according to the present embodiment, the tension force is applied to the tension member 14 in a state in which the space is left without blocking the lateral hole 20 provided in the foundation. For this reason, when the tension force is reduced due to the progress of the creep of the joint portion or the like, the lateral hole 20 in which the lower end portion of the tension member 14 is exposed (actually, the reinforcing body arranged in the lateral hole 20). By tightening the lower fixing portion 18b having a nut or the like via the, the tension member 14 can be re-tensioned. Thereby, it becomes possible to newly apply the compressive force required for improving the earthquake resistance to the brick wall 50.

In this embodiment, it is described that the new girder 32 is arranged along the existing girder 56. However, in the case where the existing girder 56 covers the upper end portion of the brick wall 50, the through hole 12 may be configured to penetrate the existing girder 56. In such a structure, the placement of the new girder 32 may be omitted.

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

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 tension member 14, and the through hole 12 and the tension member 14 through which the tension member 14 is inserted. It is characterized in that a grout material 36 such as mortar is filled between them.

As shown in FIG. 5, the unbonded PC steel stranded wire as an example of the tension member 14 has a stranded wire 14b made of PC steel arranged inside a covering portion 14a made of polyethylene. A grease 14c is filled between the portion 14a and the twisted wire 14b. For this reason, it is possible to move only the twisted wire 14b disposed inside, with the covering portion 14a fixed.

Therefore, even when the through hole 12 is filled with the grout material 36 and the covering portion 14a of the tension material 14 is fixed, the tension force can be applied again by drawing the twisted wire 14b. Further, by filling the through hole 12 with the grout 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 the third embodiment will be described with reference to FIG. 6. Note that FIG. 6 is a diagram showing a cross-sectional structure of the lateral hole forming portion in the brick wall. In the reinforcing structure of the masonry building according to the above-described first and second embodiments, the upper end of the tension member 14 is exposed to the upper part of the brick wall 50, and the lower end forms the lateral hole 20 in the foundation 54, It has been described that it is exposed in the lateral hole 20.

However, if it is difficult to expose the foundation 54 or open the upper end of the brick wall 50 due to the structure, the inner side surface of the brick wall 50 is cored to form the lateral hole 22 as shown in FIG. The lateral hole 20 may be an exposed end portion of the tension member 14. Although the depth of the lateral hole 20 also depends on the thickness of the brick wall 50, excavation may be performed so that the thickness D with the outer side surface as a base point is about 100 mm, for example. This is because if the remaining thickness D is about 100 mm, it does not affect the appearance of the building having the brick wall 50, and there is no risk of water infiltration due to rain or the like.

In the horizontal hole 20 formed in the brick wall 50, as in the horizontal hole 20 formed in the foundation 54, the tubular state 24 as the reinforcing body 22 is inserted. A grout material 34 is filled between the tubular state 24 and the lateral hole 20 so as to integrate them. When adopting such a construction method, it is desirable to adopt the following structure with the lateral hole 20 as a base point. That is, when the lateral hole 20 is formed in the wall surface on the upper end side of the tension member 14, it is advisable to provide an anchor (not shown) to the existing gut 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, the anchor is provided on the foundation 54. Each anchor is fixed to a steel pipe 24a arranged in the lateral hole 20.

With such a structure, the tension force applied to the tension member 14 is transmitted to the gluteus or foundation through the anchor. This makes it possible to apply a compressive force to the entire wall surface. In addition, in this embodiment, the example which forms the horizontal hole 20 in the lower end side of the brick wall 50 was shown, but the horizontal hole 20 may be provided in the upper end side of the brick wall 50.

[Fourth Embodiment]
Next, a reinforcing structure for a masonry building according to the fourth embodiment will be described with reference to FIG. 7. The example shown in FIG. 7 has a configuration in which the cutting portion 40 is provided on the upper side of the brick wall 50, that is, the upper wall surface, and the tension member 14 is inserted into the lateral hole 20 provided in the foundation 54.

This embodiment is effective when there is a reason such as that the roof cannot be broken and the upper portion of the brick wall 50 cannot be released. Specifically, the cutting portion 40 is formed on the inner upper wall surface of the brick wall 50, and the through hole 12 for inserting the tension member 14 through the cutting portion 40 is formed. Although the specific form of the cutting portion 40 is not limited, it is sufficient that at least the through hole 12 is formed and the tension member 14 can be inserted into the through hole 12, and preferably the tension member 14 has a tension force. It is preferable to be able to secure a space in which the tension jack 58 for applying the tension can be arranged.

After the cutting portion 40 is provided on the upper wall surface of the brick wall 50, the through hole 12 is formed from the bottom surface of the cutting portion 40 toward the lateral hole 20 formed in the foundation 54. In addition, the augment 22 is arranged in the lateral hole 20 as in the above-described embodiment. After forming the through hole 12, the tension member 14 is inserted into the through hole 12 through the cutting portion 40. Here, as the tension member 14, it is desirable to use the unbonded PC stranded wire described in the second embodiment. This is because the unbonded PC stranded wire can be applied to a narrow space where the PC steel rod cannot be placed, because it can give a curvature peculiar to the cable.

After the tendon 14 is inserted, the lower end of the tendon 14 is fixed to the reinforcing body 22 via the lower fixing portion 18b. Further, the upper fixing portion 18a is arranged on the upper end side of the tension member 14 provided in the cutting portion 40, and tension force is applied to the tension member 14 by a tension means such as a tension jack 58. By such an action, prestress can be applied to the brick wall 50, as in the above embodiment.

As described above, according to the reinforcement structure for a masonry building according to the present embodiment, the brick wall 50 is reinforced without disassembling or removing structures such as a roof located above the brick wall 50. Is possible. When it is desired to reduce the chipping range (cutting range) in order to secure the strength of the brick wall 50, as shown by two-dot chain lines in FIGS. 7A and 7B, from the opening side of the cutting part 40, respectively. You may make it provide the inclination which makes the ceiling surface low toward the back side. This is because even if the cross-sectional shape of the cutting portion 40 is such a trapezoidal shape, if the tension member 14 is a cable type such as an unbonded PC stranded wire, the insertion thereof will not be affected. Further, when the cross-sectional shape of the cutting portion 40 has a trapezoidal shape as shown in FIGS. 7A and 7B, the tension jack 58 may be installed via a curve chair 60 as shown in FIG. 7B. .. This is because the tension jack 58 can be installed in a tilted state, so that the tension jack 58 can be prevented from contacting the ceiling surface.

[Modification]
In each of the above-described embodiments, the reinforcing body 22 is described as a cylindrical steel pipe. However, the strengthening body may have any shape as long as it can exert a bearing effect against the tension force. Therefore, for example, as shown in FIG. 8, the reinforcing body 22 has a shape in which the arc portion of the steel pipe 24a is provided only on the surface to be pressed against the lateral hole 20 when the tension member 14 is applied with a tension force. The flange plate 26 may be provided so as to stretch the strings.

Further, in the above-described embodiment, the core removal of the lateral hole 20 is always shown to be circular. However, the core removal of the lateral hole 20 may be square as shown in FIG. In this case, the U-shaped precast material 38 may be arranged in the core-removed portion. When the core removal portion is square, the surface from which the tension member 14 projects can be a flat surface. Therefore, the flange plate 26 can be arranged directly on the protruding surface of the tension member 14.

Moreover, in the said embodiment, the through hole is described as being formed in the vertical direction with respect to the brick wall. However, the purpose of the reinforcing structure is only to be able to exert a force in the compression direction on the brick wall 50 via the tension member 14. Therefore, the through-hole may be formed in an angled state with respect to the vertical direction, that is, obliquely formed. This is because even in the case of such a structure, a force in the compression direction can be applied to the brick wall 50 via the tension member 14.

In the above-described embodiment, the tension is reapplied to the tension member 14 (hereinafter referred to as re-tension application) by manually tightening the nut or the like as the lower fixing portion 18b provided inside the strengthening body 22. It is stated that it can be obtained in. However, the application of the re-tensioning force to the tension member 14 may be performed by using the jack 42 as a re-tensioning means as shown in FIG. Specifically, it may be as shown in FIG. That is, the fixed flange 26a and the movable flange 26b are arranged on the augment body 22, and each flange is provided with a fixing portion (first lower fixing portion 18b1 and second lower fixing portion 18b2) for the tension member 14. .. The second lower fixing portion 18b2 provided on the side of the fixed flange 26a may be prevented from loosening by a means such as a double nut.

The jack 42 (for example, a hydraulic jack) is arranged between the fixed flange 26a and the movable flange 26b. Here, the jacks 42 are arranged in line symmetry or point symmetry with respect to the tension member 14. This is to maintain balance when applying tension. In the example shown in FIG. 10, in order to stabilize the installation, the jack main body (cylinder) is arranged on the movable flange 26b side, and the jack 42 is installed so that the piston is pressed against the fixed flange 26a. ..

After arranging the jacks 42 as described above, the jacks 42 are operated to push apart 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 re-tensioning force is applied to the tension member 14. When the second lower fixing portion 18b2 is moved and fixed to the fixing flange 26a side in a state where the tension member 14 is re-tensioned, the tension member 14 is tensioned even after the operation of the jack 42 is stopped. It is possible to keep the state (the state in which the brick wall 50 is prestressed). As described above, by using the jack 42 for applying the re-tensioning force, it is possible to apply the re-tensioning force to the tension member 14 more easily and reliably than manually.

Here, the steady tension force applied to the tension member 14 can be detected through the measuring means 30 such as a strain gauge as described above. Further, when the re-tensioning force is periodically applied, or when it is desired to directly detect the load, for example, a measuring unit such as the load cell 30a or a hydraulic pressure gauge (not shown) is provided on 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 arrangement of the measuring means 30a, as shown in FIG. 10, between a washer that receives a pressing force from the movable flange 26b and a nut that suppresses the movement of the movable flange 26b via the washer is given. be able to.

12... through-hole, 14... tension material, 14a... coating portion, 14b... twisted wire, 14c... grease, 16... coupler, 18a... upper fixing portion, 18b... ......Lower fixing section, 18b1 ......First lower fixing section, 18b2 ......Second lower fixing section, 20 ......Horizontal hole, 22 ......Reinforcement body, 24 ......Cylindrical body, Steel pipe, steel plate, steel plate, steel plate 26, flange plate 26a, fixed flange 26b, movable flange 28, support plate 30, measuring means 30a. ......Load cell, 32 ……Newly installed girder, 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 (6)

A reinforcing structure of a masonry building to which prestress is applied by a tension material inserted in a vertical hole formed by cutting a wall body,
A foundation located in the lower part of the wall body, or a cavity provided by cutting the lower wall surface of the wall body,
Having a booster installed in the cavity,
A space is left inside the strengthening body, a lower fixing portion of the tension member is fixed to the strengthening body, and an upper fixing portion of the tension member is fixed to an upper surface of the wall body. Reinforcement structure of masonry building, characterized by being present. A reinforcing structure of a masonry building to which prestress is applied by a tension material inserted in a vertical hole formed by cutting a wall body,
An upper wall surface of the wall body, and a foundation located at the lower portion of the wall body, or a cavity provided by cutting the lower wall surface of the wall body,
Having a booster installed in the cavity,
A reinforcing structure for a masonry building, characterized in that a space is left inside the augmentation body and a fixing portion of the tension member is fixed to the augmentation body. The reinforcing structure for a masonry building according to claim 1 or 2, wherein the reinforcing body is a cylindrical steel pipe or a U-shaped concrete member. The reinforcing structure for a masonry building according to claim 1 or 2, wherein the reinforcing body is in contact with the foundation and/or the wall body via a mortar. The reinforcing structure for a masonry building according to claim 3, wherein the steel pipe includes a steel plate on one end surface. The space inside the augmenter is provided with a measuring unit for measuring a tension force and/or a re-tensioning unit, and the space according to any one of claims 1 to 5, wherein Reinforcement structure of the masonry building described.

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