JP2703199B2 - How to install a seismic reinforcement protector - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[Industrial applications] In recent years, in order to prevent buildings from collapsing or collapsing due to earthquakes, it is necessary to apply seismic reinforcement treatment to columns, etc. that support existing buildings, to further strengthen the shear buckling resistance of columns, etc. Is shouting.

[0002] The present invention relates to a reinforcing method for compensating for a lack of strength of columns and the like of an existing building, and more particularly, to a shearing seat of a column and the like of a building to protect the existing building from collapse due to an earthquake or the like. The present invention relates to a method of mounting a seismic retrofit protector that enhances flexural strength.

[0003]

2. Description of the Related Art FIGS. 1 (a) and 1 (b) are cross-sectional views showing an example of reinforcing a pillar of a building by a conventional seismic reinforcement protector.

[0004] Generally, as shown in FIG. 1 (a), a pillar of a building made of a reinforcing bar is constructed by covering a central portion of a reinforcing bar 1 and a concrete 2 with a finishing material 3 such as mortar or the like. In the conventional reinforcing method, as shown in FIG. 1B, first, a finishing material is scraped off (cut out) from the periphery of the concrete 2 of the existing column, the concrete 2 is roughened, and the concrete 2 is exposed. Next, a steel plate 4 is wound around the column as a protector, and then the gap between the exposed concrete 2 and the steel plate 4 is filled with grout mortar (non-shrinkable mortar) 5 or concrete to reinforce.

In this conventional method, in order to remove the finishing material 3 and roughen the exposed surface of the concrete 2, the above-mentioned removal (or removal) is always performed, and a steel plate as a protector is used. No. 4 was formed by carrying a plurality of (for example, four) steel plates to a work site and joining them by welding there.

[0006]

However, when the column is reinforced by such a conventional reinforcing method, the following problems have occurred.

[0007] First, the noise of the finishing material
Vibration problems occur. A rock drill or the like is used to remove the finishing material, but the noise and vibration generated by the use of the rock drill significantly deteriorates the working environment of the worker and even causes the occurrence of labor illness. Furthermore, the noise and vibrations also extremely harm the environment around the workplace, and significantly affect the life or business around the workplace.

[0008] In addition, dusting of the mortar and concrete is generated by removing the finishing material and roughening the concrete, and the dust further deteriorates the working environment of the worker. Not only that, such dust floats in the air for a long time, not only deteriorating the surrounding environment after work is completed, but also requiring extensive cleaning over a long period of time, and the building is used again. It took a very long time to be possible.

[0009] Further, the dropping has caused problems such as an increase in building waste, an increase in construction cost, and an increase in construction period. In addition, in outdoor reinforcement work, noise, vibration, and dust associated with stripping have adversely affected a wider environment.

[0010] Further, a steel plate as a protector is formed by frequently using in-situ welding. However, this also causes problems such as a decrease in construction accuracy, an increase in a construction period, and a decrease in safety. In addition, an increase in the cost of temporary materials and an increase in the construction period due to the installation of temporary scaffolds and the like required for dropping and welding on site have also been problems.

The present invention has been made to solve the above problems, and not only achieves sufficient reinforcing strength, but also is safer, requires less construction cost and time, and has a working environment and surrounding environment. It is an object of the present invention to provide a method of mounting an environmentally friendly seismic retrofit protector that does not deteriorate the environment.

[0012]

SUMMARY OF THE INVENTION A method of mounting a seismic retrofit protector according to the present invention is a method for reinforcing a column supporting an existing building, without removing a mortar portion of the column and removing the column. This is a method to reinforce the concrete part without roughening. The method involves drilling a hole in the concrete part of the column from outside the column,
Inserting the protector fixing means into this hole and fixing the same, covering the periphery of the pillar with expanded metal, welding the expanded metal to the protector fixing means, and fixing the protector having a mounting hole. Attaching the protector by inserting the protector fixing means into the hole, welding the protector to the protector fixing means, and fixing the protector; and, between the protector and the pillar, an embedding agent such as a non-shrink mortar. And injecting.

[0013] The expanded metal may be formed of a mesh having an opening having a size smaller than the aggregate size of the coarse aggregate used for the column, and may be double-mounted around the column. Further, the attached expanded metals can be fixed by welding through steel materials.

[0014] The protector is composed of two steel plates,
The two steel plates can be attached by high tension bolts via gusset plates. Further, the protector may have a curved surface. An engraved anchor and a polished steel bar are used for the protector fixing means, and in the step of fixing the protector fixing means to the hole of the column, after the engraved anchor is inserted into the hole, the polished steel bar is used. It can be inserted and fixed in the engraving anchor.

[0015] The lower ends of the protector and the expanded metal are mounted at a predetermined distance from the floor, and urethane can be inserted between the lower end of the protector and the expanded metal and the floor.

The mounting method of the seismic retrofit protector of the present invention can also be applied to a column with a wall or a column with a corner. In this case, the column and the wall are separated from each other by two protectors. Reinforce it by sandwiching it from the outside. This 2
One protector is fixed by welding to a penetrating steel rod that is mounted through the wall. In addition, the fixing by the protector fixing means, the mounting of the expanded metal, and the injection of the embedding mortar are performed on both sides of the wall in the same manner as described above.

[0017]

According to the method of mounting the seismic retrofit protector of the present invention, since the periphery of the pillar is covered with an expanded metal and steel plate protector for reinforcement, the pillar is sufficiently sheared without dropping and roughening. Strength can be given. Also, since the expanded metal is fixed to the protector fixing means by welding, and the expanded metal is fixed by welding through steel materials,
Stronger reinforcement is possible without dropping off. Further, the reinforcing strength is further enhanced by attaching the expanded metal in a double manner.

Further, since the expanded metal is formed of a mesh having openings smaller than the aggregate size of the coarse aggregate used for the column, the expanded metal may be buckled by an earthquake or the like. Even so, the coarse aggregate of the column does not protrude outside the expanded metal. Therefore, the expanded aggregate of the pillars that try to buckle and try to protrude from between steel bars or hoop bars is firmly held down by expanded metal, preventing buckling and shearing of the pillars, preventing building collapse and ceiling falling can do. In addition, even in the worst case, prevent complete buckling of the pillars, the pillar dimensions can be kept short enough between the ceiling and the floor, and the space between the ceiling and the floor can be kept sufficiently long to protect human lives and facilities in the building from earthquakes. Can be.

Further, the protector has a mounting hole, and after the protector is once stabilized by inserting the protector fixing means into the mounting hole, the protector and the protector fixing means can be welded to each other, so that the safety is improved. The protector can be mounted accurately in less time. Further, since the number of welding operations on site is extremely small as compared with the conventional example, it is possible to shorten the construction period and improve the mounting accuracy. In addition, since the protector can be attached to the created two or more steel plates on site by high tension bolts via gusset plates, shortening of the construction period, improvement of safety, and improvement of attachment accuracy are achieved. .

Further, by using a protector having a curved surface, the shape of the post-reinforced column can be made into a columnar shape and the like, so that a column having an improved appearance and a good-looking shape can be produced. Note that the shape after the reinforcement is not limited to the columnar shape, and the pillars can be formed into various shapes using a square, pentagon, or other polygonal protector. In addition, if the engraved anchor and polished steel bar are used for the protector fixing means, the polished steel bar can be inserted into the hole of the pillar and then polished into the engraved anchor and fixed. Can be done.

As described above, according to the present invention, a sufficiently strong reinforcement can be performed without removing the mortar portion of the existing column and roughening the concrete portion, thereby shortening the construction period. In addition, the working environment and the surrounding environment can be improved, noise, vibration, and dust problems can be prevented, and the cost of construction can be reduced.

Further, since the number of welding steps and welding time can be reduced, it is possible to shorten the construction period, improve construction accuracy, reduce welding and construction errors, and reinforce with low construction costs.

Furthermore, if the method of reinforcing using two protectors from inside and outside of a building is used, strong reinforcement having the above-mentioned advantages is possible even for a pillar with a wall or a pillar with a corner wall. The scope of application expands further.

[0024]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, an embodiment of a method for installing an earthquake-resistant reinforcing protector for an existing building according to the present invention will be described with reference to FIGS. FIG. 2 is a vertical sectional view for explaining the method of this embodiment, and FIG. 3 is a horizontal sectional view for explaining the method of this embodiment. 4 to 10 show details of members used in this embodiment.

The method of mounting the seismic retrofit protector according to the present embodiment is as follows. First, among the pillars 10 to be reinforced, a predetermined number of pillars 10 and a finishing material 11 such as mortar constituting the pillars and a concrete (structure) ) Measure the tensile strength and compressive strength of 12. Thereafter, a structural calculation is performed based on this measurement to determine the thickness of the seismic retrofit protector 13 formed by the steel plate. The above-described measurement is performed by collecting cores at least at four or more locations per pillar, and the thickness of the reinforcing protector 13 is determined based on the structural calculation formula so as to obtain sufficient reinforcing strength.

The protector 13 is created at the factory based on the production drawing.
In addition to the thickness of the column, the number of floors with columns, the column number, the height of the column from the floor, the distance from the center of the column to the position where the protector 13 is installed, and the like are written. In addition, pillar 1 to be reinforced
If there is an electrical outlet, switch, etc. in the box 0, the box 10 is used to secure the protector 13
Space for electrical outlets, switches, etc. is secured by the length of the distance to the protector plus the distance. The locations of these electrical outlets, switches, etc. should also be correctly entered in the production drawing. In the case where an opening is provided in the protector 13 for installing an electrical outlet, a switch, etc., the loss cross-sectional area of the steel plate
Welding reinforcement around the opening of the protector 13 is performed with a double cross-sectional area and the same plate thickness.

Next, when the surface of the pillar 10 is covered with a surface finishing material, an interior material or the like, the interior material or the like is peeled off using a keren rod or the like. Thereafter, a plurality of holes are drilled in the concrete 12 from the outside of the pillar 10 without removing the finishing material 11 such as mortar of the pillar 10 and removing the roughening of the concrete 12 from the outside of the pillar 10.

Next, a carved anchor 14 such as a carved anchor 5 / 8B (inner diameter 19 mm) as shown in FIG. 4, for example, is inserted into this hole. mm (diameter 19 mm, length 25
A polished steel bar 15 (for example, 0 mm) is screwed into the engraving anchor 14 and fixed. A curing safety cap is attached to the end (head) of the polished steel bar 15 for safety considerations. In addition, resin mortar or an adhesive is filled between the hole made in the concrete and the engraving anchor 14 and the gap between the polished steel bar 15 and the column, and a more secure attachment is performed.

Next, the periphery of the pillar 10 is doubly covered with an expanded metal 16 as shown in FIG. At this time, the expanded metal 16 is installed by inserting a polished steel bar 15 into its opening, and a fixed distance is maintained between the pillar 10 and each point on the expanded metal 16 and between the expanded metals. Is installed as follows. Thereafter, the contact portion between the expanded metal 16 and the polished steel bar 15 is welded and fixed, and further, as shown in FIG. 3, the ends of the expanded metal 16 are welded and fixed via the steel material 22.

The inventor of the present invention prevents the coarse aggregate from jumping out due to the collapse of the column by installing a mesh member having an opening smaller than the coarse aggregate forming the column between the column and the protector. And could stop the complete collapse of the pillar. Therefore, the expanded metal 16 used here is formed of a mesh having openings smaller in size than the aggregate size of the coarse aggregate used for the pillar 10 to be reinforced. Thus, even when the pillar 10 buckles due to an earthquake or the like, the coarse aggregate does not jump out of the expanded metal 16, and it is possible to prevent the pillar 10 from completely collapsing and the ceiling from completely falling.

As shown in FIG. 6B, the opening of the mesh of the expanded metal 16 used in this embodiment has a short diameter (SW) of 22 mm and a long diameter (LW) of 5 mm.
Although it is 0.8 mm, it is possible to prevent the column 10 from completely collapsing by using an expanded metal having a smaller dimension. Although only one expanded metal 16 may be used around the pillar 10, the reinforcing strength is further increased by attaching the expanded metal 16 twice. As shown in FIG. 7, the ends of the expanded metal 16
For example, it is fixed by welding through a flat bar (flat steel or strip steel) having a length of 50 mm and a thickness of 6 mm, or through an angle (angle steel) as shown in FIG. By using these steel materials, the reinforcement strength and the construction system can be further improved.

Next, the split seismic retrofit protector 1
3 is brought to the site, and after confirming that the production number of the protector 13 and the column number match, the polished steel bar 15 fixed to the column 10 is inserted into the protector 13 through mounting holes 17 previously drilled at several places in the factory. After stabilizing the protector 13,
The mounting hole 17 of the protector 13 and the polished steel bar 15 are temporarily welded and fixed. This temporary welding is performed by spot tack welding.

Next, the joint portions of the protectors 13 are fastened and fixed by high tension bolts 19 via gusset plates 18. When the tightening is completed, horizontal and vertical torsion of the protector 13 is corrected using a hammer or the like via a piece of wood. After the correction is completed, the polished steel bar 15 protruding from the mounting hole 17 of the protector 13
Is cut, and all the mounting holes 17 of the protector 13 and the polished steel bar 15 are welded. This welding is JISZ380
1 by qualified person. After welding is completed, high tension bolt 19
The tightening of the protector 13 is completed by confirming whether or not the crimping of the tightening completed portion is appropriate with a torque wrench. This check may be performed before welding the polished steel bar 15 to the mounting hole 17 of the protector 13.

As shown in FIG. 9, the protectors 13 can be fixed to each other by tightening the bent joint portion of the protector 13 with a high-tensile bolt 19 via an auxiliary member 21. As the high tension bolt 19, a special high strength bolt can be used. The shape and mounting method of this special high-strength bolt are shown in FIGS.
Shown in The places where the protectors 13 are tightened are installed at positions A and D or positions B and C shown in FIG. 3 so as to face each other. When the mounting hole 17 of the protector 13 is provided so as to increase in diameter in the outward direction (to open outward), when the portion of the mounting hole 17 of the protector 13 and the polished steel bar 15 are welded, a stronger fixing is achieved. Becomes possible.

The lower ends of the protector 13 and the expanded metal 16 are mounted at a predetermined distance from the floor surface. Next, a bottom plate 23 such as a 4.5 mm thick steel plate is provided below the protector 13. It is fixed substantially parallel to the floor by spot welding or an adhesive. afterwards,
The space between the bottom plate 23 and the floor surface, for example, a space of 30 mm is filled with urethane 24, and the joint with the protector 13 is caulked with a caulking agent. In addition, protector 1
In the case where an electric outlet, a switch, or the like is attached to 3, the gap generated at the attachment location is filled with urethane and then coked with a caulking agent.

Finally, a non-shrink mortar (grouting agent) is provided between the protector 13 and the column 10 from the space between the protector 13 and the ceiling, for example, by 100 mm.
25 is press-fitted to complete the reinforcing step. Thereafter, as an auxiliary operation, the leaked grout agent is removed, the cover 26 of the gusset plate is attached, and the protector 13 is cleaned and painted. In the auxiliary work, the cloth may be directly attached to the protector 13 in some cases. In some cases, a gypsum board or the like is stuck on the outer periphery of the protector 13 and a cloth stuck finish is applied thereon.

In this embodiment, a rectangular protector is used, but the protector may have a curved surface. Although there are various types of pillars to be reinforced, various types of protectors can be used in the present invention. In addition, not only the pillar shape but also the pillar shape after reinforcement can be finished in various shapes such as cylindrical, pentagonal and other polygons. it can.

In the method of the present embodiment, the protector 13 is attached without removing the mortar of the column 10 and roughening the concrete. Increase and / or
Or, it is supplemented by the installation of the expanded metal 16. In this case, the change in the thickness of the protector 13 with respect to the conventional example is that there is no change when the target pillar 10 is on the upper layer, and that the thickness is calculated to be 1 to 2 mm on some of the middle layers, the first floor and the second floor. Increase of the degree. In addition, when an existing steel plate is used as the protector 13, the plate thickness generally increases by about 3 mm. Accordingly, a portion where a steel plate having a thickness of 9 mm is conventionally used is 12 mm, and a portion where a steel plate having a thickness of 12 mm is used uses a steel plate of 15 mm. Also, if a steel plate having a thickness of 9 mm or more is used for the gusset plate, sufficient reinforcement strength can be obtained.

Next, a second embodiment of the present invention will be described with reference to FIGS. Note that the same members as those used in the first embodiment are denoted by the same reference numerals, and a description thereof will be omitted when each member and its handling method are the same as those in the first embodiment.

The present embodiment is a method of attaching a seismic retrofit protector to a column with a wall. FIG. 11 is a horizontal sectional view showing the reinforcing method, and FIG. 12 is a vertical sectional view showing the reinforcing method of the present embodiment. Note that the vertical cross-sectional view of FIG. 12 shows a cross section when viewed from the direction E in FIG.

In the method of the present embodiment, first, when the inner wall is covered with the interior material and when the outer wall is covered with the exterior material, these are removed. And the pillar 10 'and the wall 3
5, without removing the mortar 11 ', a hole is made in the pillar 10' and the concrete portion 12 'of the wall 35 from the indoor side and the outside of the building.
Insert Next, a polished steel bar 15 is screwed into the engraved anchor 14 and fixed. Further, a plurality of through-holes communicating from the inside of the building to the outside are formed in the wall 35, and the through-holes have, for example, a length of 600 mm and a diameter of 25 mm as shown in FIG.
The wall-penetrating steel bar 30 mm is inserted. The mounting portion of the engraving anchor 14 and the insertion portion of the penetrating steel bar 30
It is completely coked to prevent intrusion such as rainwater.

Next, the pillar 10 'and the indoor side of the wall 35 are doubly covered with the expanded metal 16. Thereafter, the contact portions between the expanded metal 16 and the polished steel bars 15 and the penetrating steel bars 30 are fixed by welding.

Next, for example, the protector 13 on the inside of the room is transported to the site, and the polished steel bar 15 and the penetrating steel bar 30 fixed to the mounting holes 17 and 31 previously formed in the protector 13 at several places in the factory. Each is inserted to stabilize the protector 13. Then, protector 13
And the polished steel bar 15 are temporarily welded and fixed. At this time, the mounting hole 31 and the penetrating steel rod 30 may also be temporarily welded. It should be noted that the protector 13 may be a single piece instead of being divided into two pieces.
The following tightening of the joint is not required and the process is further simplified.

Next, the joint portions of the protectors 13 are fastened and fixed by high tension bolts 19 via gusset plates 18. When the tightening is completed, horizontal and vertical torsion of the protector 13 is corrected using a hammer or the like via a piece of wood. After the correction is completed, the polished steel bar 15 protruding from the mounting hole 17 of the protector 13
Is cut, and the mounting hole 17 portion of the protector 13 and the polished steel bar 15 and the mounting hole 31 portion and the penetrating steel bar 30 are all welded.

Next, as shown in FIG. 12, a bottom plate 23 such as a steel plate is fixed to the lower portion of the protector 13 by spot welding or an adhesive. Thereafter, a space of, for example, 30 mm between the bottom plate 23 and the floor surface is filled with urethane 24, and the joint with the protector 13 is coked with a caulking agent.

Thereafter, a non-shrink mortar (grout agent) 25 is press-fitted from the space between the protector 13 and the ceiling between the protector 13 and the pillar 10 'and the wall 35 to complete the inner reinforcing step.

Next, the outside of the wall 35 is doubly covered with the expanded metal 16, and the contact portions of the expanded metal 16, the polished steel bar 15 and the penetrating steel bar 30 are fixed by welding. Thereafter, the outer protector 13 'is carried to the site, and the polished steel bar 15 and the penetrating steel bar 30 fixed to the wall 35 are respectively inserted into the mounting holes 17 and 31 previously drilled at the protector 13' at several locations in the factory. To stabilize the protector 13 '. Thereafter, the mounting hole 17 of the protector 13 'and the polished steel bar 15 and the mounting hole 31 and the penetrating steel bar 30 are fixed by welding.

Next, the lower portion of the protector 13 is fixed to the bottom plate such as a steel plate by spot welding or an adhesive, and then a non-shrinkable mortar (grout agent) 25 is press-fitted between the protector 13 'and the outer surface of the wall 35. To complete the outer reinforcement process. Instead of attaching the bottom plate, a protector 13 ′ having a bottom plate from the beginning may be used.

Finally, caulking is performed between the end of the inner protector 13 and the inner wall and between the end of the outer protector 13 'and the outer wall, thereby completing the reinforcing process.
This caulking is important, especially on the exterior, to prevent rainwater inundation.

Next, a third embodiment of the present invention will be described with reference to FIGS. The same members as those used in the first embodiment and the second embodiment are denoted by the same reference numerals, and the explanation will be given when each member and the handling method are the same as the first embodiment and the second embodiment. Is omitted.

The present embodiment is a method for attaching an earthquake-resistant reinforcing protector to a pillar with a corner wall. FIG. 14 is a horizontal sectional view showing this reinforcing method, and FIG. 15 is a vertical sectional view showing the reinforcing method of the present embodiment. Note that the vertical cross-sectional view of FIG. 15 shows a cross-section when viewed from the F direction of FIG.

In the method of this embodiment, first, when the inner wall is covered with the interior material and when the outer wall is covered with the exterior material, these are removed. And pillar 10 "and wall 3
5 without removing the mortar 11 ", a hole is made in the pillar 10" and the concrete portion 12 "of the wall 35 from the indoor side and the outside of the building.
Is inserted, and a polished steel bar 15 is screwed into the engraving anchor 14 to be inserted and fixed. Further, a plurality of through-holes communicating from the inside of the building to the outside are formed in the wall 35, and a steel bar 30 having a length of 600 mm and a diameter of 25 mm as shown in FIG. 13 is inserted into the through-hole. The attachment portion of the engraving anchor 14 and the insertion portion of the penetrating steel bar 30 are completely coked to prevent intrusion such as rainwater.

Next, the interior side of the pillar 10 "and the wall 35 is doubly covered with the expanded metal 16. Thereafter, the contact portions of the expanded metal 16, the polished steel bars 15 and the penetrating steel bars 30 are fixed by welding.

Next, the protector 13 on the indoor side, which is formed into a W shape corresponding to, for example, the shape of a pillar with a corner wall, is carried to the site, and the protector 13 is provided with mounting holes 17 previously opened at several places in a factory. The protector 13 is stabilized by inserting the polished steel bar 15 and the penetrating steel bar 30 fixed to the pillar 10 ″ and the wall 35 into the column 31. Thereafter, the mounting hole 17 of the protector 13 and the polished steel bar 15 are temporarily welded. At this time, the mounting hole 31 and the penetrating steel rod 30 are fixed.
May also be temporarily welded.

Thereafter, the polished steel bar 15 protruding from the mounting hole 17 of the protector 13 is cut, and the protector 1 is cut.
The welding holes 17 and the polished steel bar 15 and the mounting hole 31 and the penetrating steel bar 30 are all welded.

Next, as shown in FIG. 15, a bottom plate 23 such as a steel plate is fixed to the lower portion of the protector 13 by spot welding or an adhesive. Thereafter, a space of, for example, 30 mm between the bottom plate 23 and the floor surface is filled with urethane 24, and the joint with the protector 13 is coked with a caulking agent.

After that, the non-shrink mortar (grout agent) 25 is press-fitted from the space between the protector 13 and the ceiling between the protector 13 and the pillar 10 ″ and the wall 35 to complete the inner reinforcing step.

Next, the outside of the wall 35 is doubly covered with the expanded metal 16, and the contact portions of the expanded metal 16, the polished steel bar 15 and the penetrating steel bar 30 are fixed by welding. After that, the outer protector 13 'formed in a square shape for the outer wall of the corner is carried to the site, and the protector 13' is provided with a plurality of mounting holes 17 previously opened at a factory.
The polished steel bar 15 and the penetrating steel bar 30 fixed to the wall 35 are respectively inserted into and 31 to stabilize the protector 13 '. After that, the mounting hole 17 and the polished steel bar 15 of the protector 13 ′, and the mounting hole 31 and the penetrating steel bar 30
And fixed by welding.

Next, the lower portion of the protector 13 is fixed to the bottom plate such as a steel plate by spot welding or an adhesive, and then a non-shrink mortar (grout agent) 25 is press-fitted between the protector 13 'and the outer surface of the wall 35. To complete the outer reinforcement process. Instead of attaching the bottom plate, a protector 13 ′ having a bottom plate from the beginning may be used.

Finally, caulking is performed between the end of the inner protector 13 and the inner wall and between the end of the outer protector 13 'and the outer wall, and the reinforcing process is completed.
This caulking is important, especially on the exterior, to prevent rainwater inundation.

[0061]

According to the present invention, not only is it possible to achieve reinforcement with sufficient strength to prevent an existing building from collapsing due to an earthquake or the like, but also it is safer, requires less construction cost and time, It is possible to provide a method of mounting the seismic retrofit protector that does not deteriorate the working environment and the surrounding environment. Further, even if the columns are sheared and buckled, the dimensions of the columns are hardly reduced and sufficient space can be left, thereby saving human lives and protecting facilities in the building from damage.

Further, according to the present invention, it is possible to sufficiently reinforce the existing mortar portion without stripping off the mortar portion or the like, thereby shortening the construction period and improving the working environment and the surrounding environment. In addition, noise, vibration and dust problems can be prevented, construction waste can be reduced, and construction costs can be reduced.

Further, the number of welding steps and welding time can be reduced, so that the construction period can be shortened, construction accuracy can be reduced, welding and construction errors can be reduced, and reinforcement can be achieved at low construction costs. In addition, the shortening of the construction period enables the completion of reinforcement work at night and on holidays, so that the ordering party who does not need to move or move building users without affecting the work of the building targeted for reinforcement. An advantageous reinforcement method can be provided.

[Brief description of the drawings]

FIG. 1 is a view showing a method of mounting a conventional earthquake-resistant reinforcement protector.

FIG. 2 is a vertical sectional view showing a method of attaching the seismic retrofit protector of the first embodiment of the present invention.

FIG. 3 is a horizontal sectional view showing a method of mounting the seismic retrofit protector of the first embodiment of the present invention.

FIG. 4 is a diagram illustrating a sculpted anchor used in an embodiment of the present invention.

FIG. 5 is a view showing a polished steel rod used in an embodiment of the present invention.

FIG. 6 is a view showing an expanded metal used in an example of the present invention.

FIG. 7 is a diagram showing a method for welding expanded metal used in an example of the present invention.

FIG. 8 is a diagram showing a method for welding expanded metal used in an example of the present invention.

FIG. 9 is a diagram showing a connection method of a protector used in the embodiment of the present invention.

FIG. 10 is a view showing a special high-strength bolt used in the embodiment of the present invention.

FIG. 11 is a horizontal cross-sectional view illustrating a method of attaching the seismic retrofit protector of the second embodiment of the present invention.

FIG. 12 is a vertical sectional view showing a method of attaching the seismic retrofit protector of the second embodiment of the present invention.

FIG. 13 is a view showing a steel rod penetrating the wall used in the embodiment of the present invention.

FIG. 14 is a horizontal cross-sectional view showing a method of mounting a seismic retrofit protector according to a third embodiment of the present invention.

FIG. 15 is a vertical sectional view showing a method of attaching the seismic retrofit protector of the third embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Column 11 Mortar 12 Concrete 13 Seismic reinforcement protector 14 Engraved anchor 15 Polished steel bar 16 Expanded metal 17 Mounting hole 18 Gusset plate 19 High tension bolt 21 Auxiliary material 22 Steel material 23 Bottom plate 24 Urethane 25 Non-shrink mortar (Grout agent) 26 Cover

Claims (11)

(57) [Claims] 1. A method of mounting a seismic retrofit protector on a column supporting an existing building, comprising the steps of: drilling a hole in a concrete portion of the column; inserting protector fixing means into the hole to fix the hole; Covering the periphery with an expanded metal, welding the expanded metal to the protector fixing means, and fixing the protector; attaching a protector having a mounting hole by inserting the protector fixing means into the mounting hole; A method of mounting a seismic reinforcement protector, comprising: a step of fixing a protector by welding to the protector fixing means; and a step of injecting an embedding agent between the protector and the pillar. 2. A method of mounting a seismic retrofit protector on a pillar in contact with a wall of an existing building, comprising the steps of: drilling a hole in the pillar and a concrete portion of the wall; and inserting and securing protector securing means into the hole. Drilling a through-hole penetrating the wall; inserting a penetrating steel rod into the through-hole; covering the pillar and the outer wall of the wall with expanded metal; fixing the expanded metal to the protector fixing means. And welding and fixing to the penetrating steel rod; and inserting the protector fixing means and the penetrating steel rod into the mounting hole with the protector having the mounting hole and the outer wall protector. A step of fixing the protector and the outer wall protector by welding to the protector fixing means and the penetrating steel rod; Injecting an embedding agent between the protector and the pillar and between the outer wall protector and the wall. 3. The earthquake-resistant material according to claim 1, wherein the expanded metal is formed of a mesh having an opening having a size smaller than an aggregate size of coarse aggregate used for the pillar. How to install a reinforcement protector. 4. The method according to claim 1, wherein the expanded metal is double-mounted. 5. The method according to claim 1, further comprising the step of welding the expanded metals via a steel material. 6. The protector according to claim 1, wherein the protector comprises two steel plates, and the two steel plates are attached by high tension bolts via a gusset plate.
How to install the seismic retrofit protector described in. 7. An engraved anchor and a polished steel bar are used for the protector fixing means, and in the step of fixing the protector fixing means to the hole of the pillar, after the engraved anchor is inserted into the hole, 3. The method of claim 1, wherein the polished steel bar is inserted into and fixed to the engraved anchor. 8. The method according to claim 1, wherein the embedding agent is a non-shrink mortar. 9. The method according to claim 1, wherein the protector has a curved surface. 10. A lower end of the protector and the expanded metal is attached at a predetermined distance from a floor, and urethane is inserted between the lower end of the protector and the expanded metal and the floor. The method for mounting the seismic retrofit protector according to claim 1 or claim 2. 11. The method according to claim 1, wherein each of the steps is performed without stripping off a mortar portion of the column.