JPH08333902A - Earthquake-resistant reinforcing protector mounting method - Google Patents

Abstract

PURPOSE: To reduce construction cost, shorten construction term, and improve construction accuracy by covering the circumference of a column with expand metal and mounting a protector through a protector fixing means. CONSTITUTION: A plurality of holes are provided in a concrete 12 part of a column 10 which supports an existing building, and a protector fixing means consisting of engraving anchors 14, 14 and polishing bar steels 15, 15 is inserted and fixed in these holes. Next, the circumference of the column 10 is covered with expand metal 16, 16, and the expand metal is welded and fixed on the protector fixing means. Then, earthquake-resistant reinforcing protectors 13, 13 having a mounting hole 17... are mounted by inserting the protector fixing means into the mounting hole 17, and the protector 13 is welded and fixed on the protector fixing means. Embedding agent such as nonshrinkage mortar is poured between the protector 13 and the column 10.

Description

Detailed Description of the Invention

[0001]

[Industrial application] In recent years, in order to prevent buildings from collapsing or collapsing due to an earthquake, it is necessary to further strengthen the shear buckling resistance of columns, etc. by applying seismic reinforcement treatment to columns that support existing buildings. Is being screamed.

[0002] The present invention relates to a reinforcing method for compensating for the lack of strength of pillars of an existing building, and more particularly, in order to protect an existing building from collapse due to an earthquake or the like, a shear seat of the pillars of the building is used. The present invention relates to a method for installing a seismic strengthening protector that enhances bending resistance.

[0003]

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

In general, a pillar of a building made of reinforcing steel is constructed by covering the periphery of the central portion of the reinforcing steel 1 and concrete 2 with a finishing material 3 such as mortar as shown in FIG. 1 (a). As shown in FIG. 1 (b), the conventional reinforcing method is to first remove the finishing material from the surroundings of the concrete 2 of the existing pillar (cut out), and roughen the concrete 2 to expose the concrete 2. Next, a steel plate 4 was wound around the pillar as a protector, and then, between the exposed concrete 2 and the steel plate 4, grout mortar (non-shrinkable mortar) 5 or concrete was filled 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-described chipping is always performed (or also referred to as projecting), and a steel plate as a protector. No. 4 was formed by carrying a plurality of (for example, four) steel plates to a work site and joining them by welding on the spot.

[0006]

However, when the columns are reinforced by such a conventional reinforcing method, the following problems occur.

First of all, noise and
Vibration problem occurs. A rock drilling machine or the like is used to scrape off the finishing material, but the noise and vibration generated by the use of the rock drilling machine significantly deteriorates the working environment of the worker and even causes the occurrence of work illness. Furthermore, the noise and vibrations are extremely harmful to the environment around the workplace, and have had a significant adverse effect on the lives and businesses around the workplace.

[0008] Further, dusting of the finishing material and roughening of the concrete generate dust of mortar and concrete, but this dust further deteriorates the working environment of the worker. Not only that, since such dust floats in the air for a long time, it not only deteriorates the surrounding environment even after the work is completed, but also requires a wide range of cleaning for a long time, and the building is reused. It took a very long time before it was possible.

Furthermore, the chipping off causes problems such as an increase in construction waste, an increase in construction cost, and an increase in construction period. Further, in the reinforcement work outdoors, noise, vibration, and dust caused by the scraping off have adversely affected the environment over a wider range.

Further, a steel plate as a protector is formed by making extensive use of in-situ welding, but this has also been a problem in that the construction accuracy is reduced, the construction period is increased, and the safety is reduced. 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 chipping off and field welding were also problems.

The present invention has been made in order to solve the above-mentioned problems, and not only achieves sufficient reinforcing strength, but also is safer, requires less construction cost and construction period, and has a good working environment and surrounding environment. It is an object of the present invention to provide an environment-friendly method of attaching a seismic reinforcement protector that does not deteriorate the environment.

[0012]

The method of mounting a seismic retrofit protector of the present invention is a method for strengthening a pillar that supports an existing building, and does not remove the mortar portion of the pillar, and It is a method to reinforce without damaging the concrete part of. This method consists of making a hole in the concrete part of the pillar from the outside of the pillar,
Inserting and fixing the protector fixing means in this hole, covering the periphery of the pillar with expanded metal, welding this expanded metal to the protector fixing means, and fixing the protector having a mounting hole. A step of attaching by inserting the protector fixing means into the hole, a step of welding and fixing the protector to the protector fixing means, and an embedding agent such as non-shrinkable mortar between the protector and the column. And the step of injecting.

The expanded metal is formed of a mesh having an opening having a size smaller than the aggregate size of the coarse aggregate used for the column, and can be doubly attached around the column. In addition, the attached expanded metals may be fixed by welding through a steel material.

The protector comprises two steel plates,
The two steel plates can be attached by high tension bolts via gusset plates. Also, 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, the engraved anchor is inserted into the hole and then the polished steel bar is used. It can be inserted and fixed in the engraving anchor.

The lower ends of the protector and the expanded metal are attached at a predetermined distance from the floor surface, and urethane may be inserted between the lower end of the protector and the expanded metal and the floor surface.

Further, the method of mounting the seismic retrofit protector of the present invention can be applied to a column with a wall or a column with a corner wall, in which case two columns protect the column and the wall inside the building. Reinforce by sandwiching from the outside. This 2
The two protectors are fixed by welding to a penetrating steel rod mounted through the wall. In addition, the fixing by the protector fixing means, the attachment of the expanded metal, the injection of the embedding agent mortar, etc. are performed on both sides of the wall in the same manner as described above.

[0017]

In the method of attaching the seismic reinforcement protector of the present invention, the pillar is covered with the protector of expanded metal and steel plate to reinforce the pillar, so that sufficient shear buckling is not performed on the pillar without hanging or roughening. You can give proof strength. Further, since the expanded metal is fixed to the protector fixing means by welding, and the expanded metals are also fixed by welding through the steel material,
It enables stronger reinforcement without chipping. Moreover, the reinforcing strength is further enhanced by double mounting the expanded metal.

Further, since the expanded metal is formed of a mesh having an opening having a size smaller than the aggregate size of the coarse aggregate used for the pillar, the expanded metal is likely to buckle due to an earthquake or the like. Even if there is, the coarse aggregate of the pillar does not stick out from the expanded metal. Therefore, the expanded aggregate metal is used to firmly hold down the coarse aggregate of the column that tries to pop out from between the reinforcing bars or hoops to prevent the column from buckling and shearing, preventing the building from collapsing and falling the ceiling. can do. Even in the worst case, it is possible to prevent full buckling of the columns and leave a sufficient space between the ceiling and the floor without shortening the column size, thus protecting human life and equipment in the building from an earthquake. You can

Further, since the protector has a mounting hole, the protector fixing means can be inserted into the mounting hole to stabilize the protector once, and then the protector and the protector fixing means can be welded to each other. The protector can be installed accurately in less time. Further, compared with the conventional example, the welding work on site is extremely small, so that the work period can be shortened and the mounting accuracy can be improved. In addition, the protector can be attached to the two or more steel plates that have been created on-site by a high-tensile bolt via a gusset plate, so that the work period can be shortened, safety can be improved, and installation accuracy can be improved. .

Further, by using a protector having a curved surface, the shape of the post-reinforcement column can be changed to a columnar shape or the like, so that it is possible to improve the strength and to produce a column having a good-looking shape. The shape after the reinforcement is not limited to the cylindrical shape, and the pillar can be finished into various shapes by using a quadrangular, pentagonal, or other polygonal protector. Also, if engraved anchors and polished steel bars are used for the protector fixing means, it is possible to insert the engraved anchors into the hole of the column and then insert the polished steel bars into the engraved anchors to secure it, making safer and easier reinforcement safe. Can be done.

As described above, according to the present invention, it is possible to perform sufficiently strong reinforcement without scraping off the mortar portion of the existing column and roughening the concrete portion, thus shortening the construction period. It is possible to improve the working environment and the surrounding environment, prevent the noise and vibration dust problem, and reduce the construction cost.

Further, since the number of welding steps and the welding time can be reduced, it is possible to shorten the construction period, improve the construction accuracy, reduce the welding and construction mistakes, and reinforce at a low construction cost.

Further, by using a method of reinforcing using two protectors from the inside and outside of the building, it is possible to perform strong reinforcement having the above advantages even on a column with a wall or a column with a corner wall. The applicable range of is further expanded.

[0024]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the method for attaching an earthquake-proof reinforcing protector for an existing building according to the present invention will be described below 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 seismic retrofit protector mounting method of this embodiment is as follows. First, of the columns 10 to be reinforced, a preselected number of columns are used for finishing materials 11 such as mortar and concrete (structure). ) Measure the tensile and compressive strengths of 12. After that, structural calculation is performed based on this measurement, and the plate thickness of the seismic reinforcement protector 13 formed by the steel plate is determined. The above-described measurement is performed by collecting cores at four or more locations for at least one column, and the plate thickness of the reinforcement protector 13 is determined based on the structural calculation formula so that sufficient reinforcement strength can be obtained.

The protector 13 is produced at the factory based on the manufacturing drawing.
In addition to the board thickness, the number of floors with pillars, the pillar number, the height of the pillar from the floor, the distance from the center of the pillar to the position where the protector 13 is installed, and the like are written. Also, the pillar 1 to be reinforced
If there are electrical outlets, switches, etc. in 0, use boxes to connect the columns to the protector 13
Space for electrical outlets, switches, etc. will be secured for the length up to the thickness of the protector plus. The locations of these electrical outlets, switches, etc. should be entered correctly in the above production drawing. When the protector 13 is provided with an opening for installing an electrical outlet, a switch, etc., it is 2
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 or an interior material, the interior material or the like is peeled off by using a kelen stick or the like. After that, a plurality of holes are drilled from the outside of the pillar 10 to the concrete 12 with a concrete drill without removing the finishing material 11 such as the mortar of the pillar 10 and removing the roughening of the concrete 12.

Next, an engraving anchor 14 such as an engraving anchor 5 / 8B (inner diameter 19 mm) as shown in FIG. 4 is inserted into this hole, and then, for example, a polishing steel bar SS40 kg / as shown in FIG. mm (diameter 19 mm, length 25
A polished steel bar 15 such as 0 mm) is screwed into the engraving anchor 14 and fixed. For safety reasons, a curing safety cap is attached to the end (head) of the polished steel bar 15. Further, a resin mortar or an adhesive is filled between the holes formed in the concrete and the engraved anchors 14 and in the gaps between the polished steel bars 15 and the pillars for stronger attachment.

Next, the periphery of the pillar 10 is doubly covered with the expanded metal 16 as shown in FIG. At this time, the expanded metal 16 is installed by inserting the polishing steel bar 15 into the opening thereof, and a constant separation distance is provided between the pillar 10 and each point on the expanded metal 16 and between the expanded metals. Is installed. After that, the contact portion between the expanded metal 16 and the polished steel bar 15 is welded and fixed, and further, the ends of the expanded metal 16 are welded and fixed via the steel material 22, as shown in FIG.

The inventor of the present invention installs, between the column and the protector, a mesh member having an opening having a size smaller than that of the coarse aggregate forming the column to prevent the coarse aggregate from popping out due to the collapse of the column. I thought that I could do this and stop the collapse of the pillar. Therefore, the expanded metal 16 used here is formed of a mesh having an opening having a size smaller than the aggregate size of the coarse aggregate used for the column 10 to be reinforced. As a result, even if the pillar 10 buckles due to an earthquake or the like, the coarse aggregate does not jump out from the expanded metal 16, and it is possible to prevent the pillar 10 from completely collapsing and the ceiling from completely falling.

As for the size of the opening of the mesh of the expanded metal 16 used in this example, the short diameter (SW) is 22 mm and the long diameter (LW) is 5 as shown in FIG. 6B.
Although it is 0.8 mm, it is possible to prevent the column 10 from completely collapsing even if an expanded metal having a size smaller than these is used. Although only one expanded metal 16 may be used around the pillar 10, the reinforcing strength is further increased by double mounting. As shown in FIG. 7, the ends of the expanded metal 16 are
For example, they are welded and fixed via a flat bar (flat steel or strip steel) having a length of 50 mm and a thickness of 6 mm, or as shown in FIG. 8 via an angle (angle steel) or the like. By using these steel materials, the reinforcing strength and the construction system can be further improved.

Next, the seismic reinforcement protector 1 is divided into two parts.
3 is carried to the site, and after confirming that the production number of the protector 13 and the number of the pillar are the same, the polishing steel bar 15 fixed to the pillar 10 is inserted into the mounting holes 17 which are opened in the protector 13 at several places in advance. After stabilizing the protector 13,
The attachment hole 17 portion of the protector 13 and the polished steel bar 15 are temporarily welded and fixed. This temporary welding is performed by spot welding.

Next, the joint portion between the protectors 13 is fixed by tightening the high tension bolts 19 via the gusset plate 18. When the tightening is completed, a horizontal or vertical twist of the protector 13 is corrected using a hammer or the like through the piece of wood. After the correction is completed, the polished steel bar 15 protruding from the mounting hole 17 of the protector 13
Then, the mounting hole 17 of the protector 13 and the polished steel bar 15 are all welded. This welding is JISZ380
Qualified by 1. After welding is completed, high tension bolt 19
After confirming whether or not the crimping of the tightening completed portion is proper with a torque wrench, the mounting of the protector 13 is completed. It should be noted that this confirmation may be performed before welding between the mounting hole 17 portion of the protector 13 and the polished steel bar 15.

The protectors 13 may be fixed to each other by fastening the bent joint portion of the protector 13 with a high tension bolt 19 via an auxiliary member 21, as shown in FIG. A special high strength bolt can be used as the high tension bolt 19. The shape and mounting method of this special high strength bolt are shown in FIGS.
Shown in Further, the tightening locations of the protectors 13 are installed at positions A and D or positions B and C shown in FIG. 3 so as to face each other. In addition, when the mounting hole 17 of the protector 13 is provided so as to have a larger diameter in the outer direction (opened in the outer direction), when the mounting hole 17 portion of the protector 13 and the polished steel bar 15 are welded together, a stronger fixation is achieved. Is possible.

The lower ends of the protector 13 and the expanded metal 16 are attached at a predetermined distance from the floor surface. Next, a bottom plate 23 such as a steel plate having a thickness of 4.5 mm is attached to the lower part of the protector 13. It is fixed by spot welding or an adhesive, etc. almost parallel to the floor surface. afterwards,
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 caulked with a caulking agent. Also, protector 1
When attaching an electric outlet, a switch, etc. to 3, the urethane is filled in the gap formed at the attaching position, and then caulking is performed with a caulking agent.

Finally, a non-shrinkable mortar (grout agent) is provided between the protector 13 and the pillar 10 from the space between the protector 13 and the ceiling, for example, a space of 100 mm.
25 is press-fitted to complete the reinforcing process. Thereafter, as auxiliary work, the leaked grout agent is removed, the gusset plate cover 26 is attached, and the protector 13 is cleaned and painted. In the auxiliary work, cloth may be directly attached to the protector 13. In some cases, a gypsum board or the like is attached to the outer circumference of the protector 13, and a cloth attaching finish is applied on the gypsum board.

In this embodiment, the protector has a quadrangular shape, but the protector may have a curved surface. Although there are various shapes of columns to be reinforced, in the present invention, a protector having a shape matching these shapes can be used. In addition to the shape of the pillar, the shape of the pillar after reinforcement can be finished in various shapes such as cylindrical shape, pentagonal shape, and other polygonal shapes, and it is possible to improve the strength and create a pillar with a good-looking shape. it can.

Further, in the method of this embodiment, the protector 13 is attached without projecting the mortar of the column 10 and roughening the concrete, but the decrease in the reinforcing strength due to this is caused by the thickness of the steel plate of the protector 13. And /
Alternatively, it is supplemented by the installation of expanded metal 16. In this case, there is no change in the thickness of the protector 13 with respect to the conventional example when the target pillar 10 is in the upper floor, and in some of the middle floors, the first floor and the second floor, the calculation is 1-2 mm. The degree will increase. In addition, when an existing steel plate is used as the protector 13, the plate thickness generally increases by about 3 mm. Therefore, the portion where the steel plate having the thickness of 9 mm is conventionally used is 12 mm, and the portion where the steel plate having 12 mm is used is the steel plate having 15 mm. Further, if a steel plate having a thickness of 9 mm or more is used for the gusset plate, sufficient reinforcing strength can be obtained.

Next, a second embodiment of the present invention will be described with reference to FIGS. The same members as those used in the first embodiment are designated by the same reference numerals, and the description thereof is omitted when the respective members and how to handle them 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 this reinforcing method, and FIG. 12 is a vertical sectional view showing the reinforcing method of this embodiment. The vertical cross-sectional view of FIG. 12 shows a cross section when viewed from the E direction of FIG.

In the method of this embodiment, first, if the inner wall is covered with the interior material, and if the outer wall is covered with the exterior material, these are removed. And the pillar 10 'and the wall 3
Without removing the mortar 11 'of No. 5, from the inside and outside of the building, make a hole in the pillar 10' and the concrete portion 12 'of the wall 35, and engrave the anchor 14 in this hole.
Insert. Next, the polished steel bar 15 is screwed into the carved anchor 14 and fixed. Further, a plurality of through holes communicating from the inside to the outside of the building are opened in the wall 35, and the through holes have a length of 600 mm and a diameter of 25 mm as shown in FIG. 13, for example.
A wall-penetrating steel rod 30 of mm is inserted. The mounting portion of the engraving anchor 14 and the insertion portion of the penetrating steel rod 30 are
Completely caulked to prevent intrusion of rainwater.

Next, the interior side of the pillar 10 'and the wall 35 is doubly covered with the expanded metal 16. After that, the expanded metal 16, the polished steel bar 15, and the contact portion of the penetrating steel bar 30 are welded and fixed.

Next, for example, the protector 13 on the indoor side, which is divided into two parts, is carried to the site, and the polished steel bar 15 and the penetrating steel bar 30 fixed to the protector 13 are attached to mounting holes 17 and 31 which are opened at several places in the factory in advance. Each is inserted and the protector 13 is stabilized. Then protector 13
The attachment hole 17 portion of and the polished steel bar 15 are temporarily welded and fixed. At this time, the mounting hole 31 portion and the penetrating steel rod 30 may also be temporarily welded. It should be noted that the protector 13 may be a single one instead of being divided into two parts. In that case,
The tightening of the joints shown below is not required and the process is further simplified.

Next, the joint portion between the protectors 13 is fixed by tightening the high tension bolts 19 via the gusset plate 18. When the tightening is completed, a horizontal or vertical twist of the protector 13 is corrected using a hammer or the like through the piece of wood. After the correction is completed, the polished steel bar 15 protruding from the mounting hole 17 of the protector 13
Then, 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 caulked with a caulking agent.

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

Next, the outside of the wall 35 is doubly covered with the expanded metal 16, and the expanded metal 16 and the contact portion of the polished steel bar 15 and the penetrating steel bar 30 are welded and fixed. After that, the protector 13 'for the outside is carried to the site, and the polishing steel bar 15 and the penetrating steel bar 30 fixed to the wall 35 are inserted into the mounting holes 17 and 31 formed in the protector 13' in several places in the factory beforehand. To stabilize the protector 13 '. After that, 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 rod 30 are welded and fixed.

Next, a bottom plate such as a steel plate is fixed to the lower portion of the protector 13 by spot welding or an adhesive agent, and a non-shrink mortar (grouting agent) 25 is press-fitted between the protector 13 'and the outer surface of the wall 35. Then, the outer reinforcing process is completed. 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 to complete the reinforcing process.
This caulking is important especially on the outer surface to prevent rainwater inundation.

Next, a third embodiment of the present invention will be described with reference to FIGS. 14 and 15. The same members as those used in the first and second embodiments are designated by the same reference numerals, and the case where each member and the handling method are the same as those in the first and second embodiments will be described. Is omitted.

The present embodiment is a method of attaching a seismic retrofit protector to a column 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 this embodiment. 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, if the inner wall is covered with the interior material, and if the outer wall is covered with the exterior material, these are removed. And the pillar 10 "and the wall 3
Without removing the mortar 11 "of No. 5, the pillar 10" and the concrete portion 12 "of the wall 35 are drilled from the inside and the outside of the building, and the carved anchor 14 is inserted in this hole.
Then, the polished steel bar 15 is screwed into the engraved anchor 14 to be fixed. Further, a plurality of through holes communicating from the inside to the outside of the building are opened in the wall 35, and a wall penetrating steel rod 30 having a length of 600 mm and a diameter of 25 mm as shown in FIG. 13 is inserted into the through holes. The attachment portion of the engraved anchor 14 and the insertion portion of the penetrating steel rod 30 are completely caulked to prevent intrusion of rainwater or the like.

Next, the inside of the column 10 "and the wall 35 is doubly covered with the expanded metal 16. After that, the expanded metal 16 and the contact portions of the polished steel bar 15 and the penetrating steel bar 30 are welded and fixed.

Next, the W-shaped protector 13 on the indoor side corresponding to the shape of the pillar with a corner wall is carried to the site, and the protector 13 is provided with mounting holes 17 and holes 17 which are pre-drilled at several places in the factory. The steel bar 15 "and the penetrating steel bar 30 fixed to the column 10" and the wall 35 are inserted into the column 31, respectively, to stabilize the protector 13. After that, the mounting hole 17 of the protector 13 and the steel bar 15 are temporarily welded. At this time, the mounting hole 31 and the penetrating steel rod 30
May also be temporarily welded.

After that, the polishing steel bar 15 protruding from the mounting hole 17 of the protector 13 is cut to remove the protector 1
3, the mounting hole 17 portion 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. 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 caulked with a caulking agent.

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

Next, the outside of the wall 35 is doubly covered with the expanded metal 16, and the expanded metal 16 and the contact portions of the polished steel bar 15 and the penetrating steel bar 30 are welded and fixed. After that, for example, a protector 13 'for the outside, which is formed in a dogleg shape for the outer wall of the corner, is carried to the site, and the protector 13' is provided with several mounting holes 17 which are pre-drilled in the factory.
The polishing 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 part of the protector 13 'and the polished steel bar 15, and the mounting hole 31 part and the penetrating steel bar 30
Weld and fix.

Next, a bottom plate such as a steel plate is fixed to the lower portion of the protector 13 by spot welding or an adhesive, and then non-shrink mortar (grouting agent) 25 is press-fitted between the protector 13 'and the outer surface of the wall 35. Then, the outer reinforcing process is completed. 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 to complete the reinforcing process.
This caulking is important especially on the outer surface to prevent rainwater inundation.

[0061]

EFFECTS OF THE INVENTION According to the present invention, not only can reinforcement having sufficient strength to prevent an existing building from being collapsed due to an earthquake or the like, but also be safer, the construction cost and the construction period can be reduced, It is possible to provide a method of attaching a seismic retrofit protector that does not deteriorate the working environment and the surrounding environment. Further, even if the column is sheared and buckled, the column size is not shortened and a sufficient space can be left, thereby saving lives and protecting the equipment in the building from damage.

Further, according to the present invention, it is possible to perform sufficiently strong reinforcement without removing the mortar portion of the existing pillars, so that the construction period is shortened and the working environment and the surrounding environment are improved. It is possible to prevent noise, vibration and dust problems, reduce construction waste, and reduce construction costs.

Further, the number of welding steps and the welding time can be reduced, and the work period can be shortened, the working accuracy can be improved, welding and working mistakes can be reduced, and the reinforcement can be achieved at a low cost. Furthermore, by shortening the construction period, it is possible to finish the reinforcement work at night and on holidays, so it does not affect the work of the building to be reinforced and it is possible for the orderer who does not need to move or move the building user. An advantageous reinforcement method can be provided.

[Brief description of drawings]

FIG. 1 is a view showing a method of attaching a conventional seismic reinforcement protector.

FIG. 2 is a vertical cross-sectional view showing a method for mounting the seismic reinforcement protector according to the first embodiment of the present invention.

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

FIG. 4 is a view showing a carved anchor used in an embodiment of the present invention.

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

FIG. 6 is a diagram 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 of welding expanded metal used in an example of the present invention.

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

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

FIG. 11 is a horizontal cross-sectional view showing a method for mounting the seismic strengthening protector of the second embodiment of the present invention.

FIG. 12 is a vertical cross-sectional view showing a method for mounting the seismic retrofit protector of the second embodiment of the present invention.

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

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

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

[Explanation of symbols]

 10 Pillars 11 Mortar 12 Concrete 13 Seismic Reinforcement Protector 14 Engraving Anchor 15 Polished Steel Bar 16 Expanded Metal 17 Mounting Hole 18 Gusset Plate 19 High Tensile Bolt 21 Auxiliary Material 22 Steel Material 23 Bottom Plate 24 Urethane 25 Non Shrink Mortar (Grout Agent) 26 Cover

Claims (11)

[Claims] 1. A method of mounting a seismic retrofit protector to a pillar supporting an existing building, which comprises a step of making a hole in a concrete portion of the pillar, a step of inserting and fixing a protector fixing means in the hole, and Covering the periphery with expanded metal, welding and fixing the expanded metal to the protector fixing means, and 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 welding and fixing a protector to the protector fixing means; and a step of injecting an embedding agent between the protector and the column. 2. A method of mounting a seismic retrofit protector on a pillar in contact with a wall of an existing building, the method comprising the steps of making a hole in a concrete portion of the pillar and the wall, and inserting and fixing a protector fixing means in the hole. A step of forming a through hole penetrating the wall, a step of inserting a through steel rod into the through hole, a step of covering the pillar and the outer wall of the wall with an expanded metal, and a step of fixing the expanded metal to the protector fixing means. And a step of welding and fixing to the penetrating steel rod, and a protector having a mounting hole and a protector for an outer wall, by inserting the protector fixing means and the penetrating steel rod into the mounting hole, thereby fixing the wall and the column. Sandwiching and attaching, and a step of welding and fixing the protector and the outer wall protector to the protector fixing means and the penetrating steel rod, And a step of injecting an embedding agent between the protector and the pillar and between the outer wall protector and the wall. 3. The seismic resistance according to claim 1 or 2, 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 column. How to install the reinforced protector. 4. The method for mounting a seismic reinforcement protector according to claim 1, wherein the expanded metal is mounted in double. 5. The method for mounting the seismic reinforcement protector according to claim 1 or 2, including a step of welding the expanded metals to each other through a steel material. 6. The protector is composed of two steel plates, and the two steel plates are attached by a high tension bolt via a gusset plate.
How to install the seismic reinforcement protector described in. 7. The protector fixing means includes an engraved anchor and a polished steel bar, 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, The method for mounting the seismic reinforcement protector according to claim 1 or 2, wherein the polished steel bar is inserted into and fixed to the engraved anchor. 8. The method for mounting a seismic reinforcement protector according to claim 1, wherein non-shrink mortar is used as the embedding agent. 9. The method for mounting the seismic reinforcement protector according to claim 1, wherein the protector has a curved surface. 10. The protector and the lower end of the expanded metal are attached at a predetermined distance from the floor surface, and urethane is inserted between the lower end of the protector and the expanded metal and the floor surface. The method for mounting the seismic reinforcement protector according to claim 1 or 2. 11. The method for mounting the seismic reinforcement protector according to claim 1, wherein each of the steps is performed without removing the mortar portion of the column.