JP4810201B2 - Concrete structure reinforcing structure and concrete structure reinforcing method - Google Patents

Description

  The present invention relates to a concrete structure reinforcing structure and a reinforcing method, and more particularly, a concrete structure reinforcing structure and a concrete structure suitable for use in a foundation portion of a building such as a house and further suitable for an unreinforced foundation without reinforcing bars. The present invention relates to an object reinforcement method.

  Conventionally, a concrete structure reinforcement structure as shown in FIG. 16 is known.

  Such a conventional concrete structure reinforcement structure is a reinforcement structure that is used to improve the strength when the existing foundation 1 of a building such as a house is an unreinforced foundation with no reinforcing bars inside. It is.

  In such a conventional reinforcing structure, the suspensions 1b and 1b are formed on the side surface 1a of the existing foundation 1.

  Then, the concrete 4 is placed by placing the portions 3a, 3a of the reinforcing bars 3 of the additional foundation 2 to be ligated into the suspensions 1b, 1b.

  A concrete structure reinforcing structure as shown in FIG. 17 is also known (see, for example, Patent Document 1).

  In such a case, perforations 6 and 6 are formed obliquely downward from the rising portion 5a of the base 5 toward the footing portion 5b, and the rod-like fiber reinforced resin composite materials 7 and 7 are inserted.

  Then, the cement-type grout agent 8 is filled in these perforations 6 and cured, whereby the foundation 5 and the fiber reinforced resin composite materials 7 and 7 are bonded.

  Furthermore, a concrete structure reinforcing structure as shown in FIG. 18 is known (see, for example, Patent Document 2).

  In such a structure, the reinforcing body 12 is fastened to the outer surface 11 a of the existing foundation 11 by a plurality of anchor bolts 13, and is further bonded by the polymer cement 14.

  In the reinforcing body 12, carbon fiber sheets 12b and 12b are bonded to both side surfaces of a flat steel plate 12a using an epoxy resin.

  And in the conventional concrete structure reinforcement structure comprised in this way, in addition to the fastening force of several anchor bolt 13 ... fastened at fixed intervals, the said reinforcement body 12 is further polymer cement 14 Is adhered so as to be in close contact with each other.

For this reason, a firm fixing force can be obtained and the reinforcement can be ensured.
Japanese Patent No. 3500120 (paragraphs 0006 to 0017, FIG. 1) JP-A-10-121745 (paragraphs 0011 to 0015, FIGS. 1, 3 and 4)

  In the conventional concrete structure reinforcing structure configured as described above, as shown in FIG. 16, the underground footing portion 1c must be cut out to newly form the footing portion 2a, which is difficult to construct. there were.

  Moreover, the depth d of the hanger 1b is also determined by the depth of the hand because the flea is struck with a hammer, or a dedicated flea is smashed using a hammer driven by compressed air, hydraulic pressure, or an electric motor. There is a problem that it is difficult to manage dimensions such as d and size.

  Moreover, in the conventional concrete structure reinforcement structure as shown in FIG. 17, the strength between the rising portion 5a and the footing portion 5b is improved to obtain a sufficient strength against a lateral external force such as an earthquake. Therefore, it is necessary to form a plurality of perforations 6 at regular intervals from both side surfaces of the rising portion 5a.

  In particular, when this concrete structure reinforcing structure is applied to an existing building, there is a problem that it is difficult to form the perforations 6 from one side surface of the rising portion 5a located inside the building and the construction is difficult. .

  Furthermore, it is necessary to protect the fiber reinforced resin composite materials 7 and 7 exposed to the ground 10 using protective materials 9 and 9 made of polystyrene foam material, etc. Making it difficult.

  Further, in the conventional concrete structure reinforcing structure shown in FIG. 18, when the reinforcement body 12 is peeled off by the polymer cement 14, only the portion fastened by the anchor bolt 13 is used to attach the reinforcement body 12 to the foundation 11. Will be fixed.

  For this reason, the function of the flat plate-like reinforcing body 12 that exerts a reinforcing effect integrally with the foundation 11 is not exhibited, and stress is concentrated on the anchor bolt 13 portion, and cracks may be generated from this portion. There was also.

  In particular, when the reinforcing body 12 is affixed over almost the entire surface so as to block the outer surface 11a of the foundation 11, the moisture in the foundation 11 is not evaporated to the outside air, and the reinforcement by the polymer cement 14 is caused by this moisture. There was a possibility that the adhesion of the body 12 would be peeled off.

  Then, this invention makes it a subject to provide the concrete structure reinforcement structure and concrete structure reinforcement method which construction is easy and can maintain a reinforcement effect over a long period of time.

In order to achieve the above object, the invention described in claim 1 is the slit groove having a certain depth from the outer surface of the concrete structure, the longitudinal direction is made to coincide with the longitudinal direction of the slit groove , Long rectangular fiber reinforcement that has the strength to receive the shear stress of a concrete structure so as to disperse in a plane in the in-plane and out-of-plane directions, and the direction of the carbon fibers is aligned along the longitudinal direction of the slit groove. A flat plate material, which is a resin molded body, is embedded and embedded, and an epoxy resin material filled in a gap between both inner side surfaces of the slit groove and both side surfaces of the flat plate material is used. Each side surface is characterized by the concrete structure reinforcement structure each fixed to the inner surface of the slit groove.

Further, according to a second aspect of the present invention, the concrete structure is an unfounded foundation of a building, and has a thickness direction dimension of about 1 from the outer surface so as to intersect with a crack existing at a rising portion of the foundation. Less than / 2, the slit groove is formed, and the flat plate material is embedded in the slit groove with the in-plane / outside direction being the vertical direction, and the gap between the flat plate material and the slit groove is filled. The concrete structure according to claim 1 , wherein the epoxy resin material is filled so as to be integrated in a cured state until reaching the space in the crack .

Further, according to the third aspect of the present invention, the flat plate material is a long rectangular fiber reinforced resin molded body having a strength for receiving the shear stress of the concrete structure so as to disperse in a planar shape in the in-plane direction. In the slit groove formed by cutting at a certain depth from the outer surface of the concrete structure, the longitudinal direction of the slit groove is aligned along the longitudinal direction of the slit groove, so that the length of the slit groove is Embedded in the direction of the carbon fiber along the direction, filled with an epoxy resin material in the gap between the flat plate and the inner surface of the slit groove, by curing the epoxy resin material, The concrete structure reinforcing method is characterized in that both side surfaces are fixed to the inner side surface of the slit groove .

Further, according to the present invention, the concrete structure is an unfounded foundation of a building, and has a thickness direction dimension of about 1 from the outer surface so as to intersect a crack existing at a rising portion of the foundation. / 2 slit groove is formed, and the flat plate material is embedded in the horizontal slit groove with the in-plane and external directions being the vertical direction, and the gap between the flat plate material and the slit groove is embedded. The concrete structure reinforcing method according to claim 3 , wherein the epoxy resin material is filled and the epoxy resin material and the epoxy resin material filled together in the space in the crack are integrated in a cured state .

Moreover, what is described in Claim 5 is characterized by the concrete structure reinforcing method according to Claim 3 or 4 , wherein a low-pressure resin injection squeeze plate is used for filling the epoxy resin material .

  According to the first aspect of the present invention configured as above, the slits are formed by an epoxy resin material in which both side surfaces of the flat plate material are filled in a gap between both inner side surfaces of the opposed slit grooves. The base and the flat plate are integrated with each other by being fixed to the inner surface of the groove.

  For this reason, compared with the case where only one side is bonded, the bonding area is about twice, and the bonding strength can be increased.

  The flat plate material is interposed in the slit groove in a longitudinal direction that coincides with the longitudinal direction of the slit groove.

  For this reason, an external force in the peeling direction is not directly applied to the flat plate material. Moreover, since the outer surface of the concrete structure is not covered and moisture is evaporated from the concrete structure, a decrease in adhesive force is also suppressed.

  Although concrete deteriorates with age, normally, neutralization (oxidation) proceeds toward the inside from the surface layer, and the compressive strength decreases.

  When the target property to which the present invention is applied has changed over time, the surface layer is often deteriorated.

For this reason, compared with the case where the flat plate or the like is pasted near the surface layer surface, the slit groove is provided to interpose the flat plate material, and the shear stress of the concrete structure is applied to the surface closer to the core. Embedding a flat plate material which is a long rectangular fiber reinforced resin molded body having the strength to receive in a flat shape in the inner and outer directions and the direction of the carbon fibers matching the longitudinal direction of the slit groove Those that are fixed and fixed can further improve the reliability of the bonded state.
Furthermore, the fiber reinforced resin molding which comprises the said flat material makes the direction of carbon fiber correspond along the longitudinal direction of the said slit groove | channel.
For this reason, for example, when the concrete structure is an unreinforced foundation of a building, the load in the vertical direction over the unreinforced foundation is distributed to the force in the extension direction having the highest strength substantially orthogonal to the alignment direction of the carbon fibers. Therefore, sufficient strength as a seismic reinforcement can be provided on the basis with a small amount of the flat plate material.

Also, before Symbol slit inner groove, a surface-out direction as a vertical direction, the flat plate member is embedded.

  The flat plate material is provided in the slit groove with its longitudinal direction coinciding with the longitudinal direction of the slit groove.

  For this reason, the vertical load applied to the foundation is received as an in-plane and outward force of the flat plate material.

  For this reason, for example, reinforcement can be effectively performed as compared with a rod-shaped (round bar-shaped) reinforcing bar or a fiber reinforced resin composite material having another shape.

  Moreover, since the slit groove is less than about 1/2 of the dimension in the thickness direction of the rising portion of the foundation from the outer surface, the foundation having a dimension exceeding about half is left as it is.

  For this reason, even if an existing building is placed on the upper part of the foundation, even if a slit groove in a substantially horizontal direction is formed on the foundation, the reinforcement work can be performed without any problem.

  The foundation to be reinforced may have a finished surface such as mortar finish or paint finish, and the concrete structure may not be exposed.

  In such a case, as in the prior art, if the flat plate or the like is to be directly pasted in the vicinity of the surface layer surface, a step of pulverizing and peeling the finished surface such as mortar finish or paint finish is required in the previous step. .

In contrast, a thickness of about slit groove before Symbol flat plate, by providing in anticipation of finishing thickness, the conventional finished surface, such as, can be omitted a step of chipping and peeling.

  Therefore, it is possible to reduce the number of construction steps and suppress an increase in construction cost.

And what was described in Claim 2 has the epoxy resin which adhere | attaches the flat material embed | buried in the said slit groove | channel so that it may cross | intersect with the epoxy resin in the crack which exists in the standing part of the said non-muscle foundation In the cured state, they are united.

  Usually, there is a high probability that a crack will occur again around the part where the crack occurs, such as load concentration.

  For this reason, the epoxy resin used when repairing the crack and the epoxy resin fixing the flat plate reinforcing the periphery are integrated in the vicinity of the intersecting portion, thereby further improving the strength and effectively After the repair, the surroundings are reinforced to prevent the recurrence of cracks and to provide earthquake resistance.

Further, according to the third aspect of the present invention, for example, a slit groove having a certain depth is cut and formed from the outer surface of the concrete structure using a disk sander device or the like.

  Since the disc sander device can cut the cutting depth from the outer surface to a certain depth, construction management with good accuracy is possible.

  Further, when a flat plate material having a longitudinal direction matching the longitudinal direction of the slit groove is embedded in the slit groove, a certain depth from the outer surface is constant. The flat plate can be easily positioned.

Further, according to a fourth aspect of the present invention, the reinforcing operation of filling the gap between the flat plate material and the slit groove with the epoxy resin material is performed, and the space in the crack is filled with the epoxy resin material. It can be done at the same time as repair work.

  Moreover, the epoxy resin material and construction tool used for filling can be the same.

  For this reason, the epoxy resin material composed of the same material filled at the same time has good workability, and in addition to the affinity for the fiber reinforced resin molded product, the affinity at the portion where the flat plate material intersects The strength after curing can be improved without generating an interface.

And what was described in Claim 5 can give the continuous filling pressure at the time of filling by using the squeeze plate for low-pressure resin injection | pouring for filling of the said epoxy resin material.

  For this reason, the epoxy resin material with which the space | gap between the said flat material and this slit groove | channel is filled can be spread evenly to a fine clearance gap, and also a strong adhesive force can be given.

  In addition, even if the epoxy resin material is hardened and shrinks in volume, a continuous filling pressure can be applied for a long time, so that the volume decrease can be compensated.

  For this reason, desired adhesive force can be given, without generating sink marks in the epoxy resin after hardening.

  Next, a concrete structure reinforcing structure and a concrete structure reinforcing method of the best mode for carrying out the present invention will be described with reference to the drawings.

  1 to 15 show a concrete structure reinforcing structure and a concrete structure reinforcing method according to the preferred embodiment of the present invention.

  First, the main structure will be described with reference to FIGS. 1 and 2. In the concrete structure reinforcing structure of this embodiment, the foundation as a concrete structure of a building 15 such as an existing house as shown in FIG. In order to reinforce 16, the outer surface 16b of the rising portion 16a connected to the footing portion 16c of the bare base 16 has a thickness direction dimension (about 120 mm to 200 mm) of about 1/2 from the outer surface. The slit groove 17 is cut and formed to a certain depth d1 substantially horizontally, preferably with a dimension of less than 1/3.

  A fiber reinforced resin molded body 18 as the flat plate material is embedded in the slit groove 17 with the in-plane and outward directions being the vertical direction.

  As the fiber reinforced resin molded body 18 of this embodiment, two or more types of carbon fiber reinforced plastic plates (width 50 mm × thickness 1.2 mm, or width 25 mm × thickness 1. 2 mm or the like) is appropriately used according to the size of the concrete structure and the required strength of reinforcement.

  Then, the fiber reinforced resin molded body 18 is inserted with the direction of the carbon fiber aligned along the longitudinal direction of the slit groove 17 and embedded, and the epoxy resin material is filled in the slit groove 17. Then, by being cured, the fiber-reinforced resin molded body 18 is bonded to the base 16 with a wide bonding area so as to be integrated with the epoxy resin 19.

  Next, the concrete structure reinforcement method of this embodiment is demonstrated using FIG.

  In FIG. 3, for easy understanding, the direction of the foundation 16 as a concrete structure is changed by about 90 degrees, and the shape and the like are simplified.

  In this embodiment, as shown in FIG. 3A, the slit groove 17 having a certain depth is cut by the disk sander device 20 from the outer surface 16 b which is the outer surface of the foundation 16.

  In this embodiment, when the dimension in the width direction of the slit groove 17 is about 2 to 3 mm and the fiber-reinforced resin molded body 18 having the width of 50 mm is used, the dimension in the depth direction is the depth d1 from the outer surface 16b. When the fiber reinforced resin molded body 18 having a width of about 55 mm and a width of 25 mm is used, the fiber is cut so that the depth d1 from the side surface 16b is about 30 mm.

  Next, after drying and curing, as shown in FIG. 3 (b), a fiber reinforced resin molded body 18 as a flat plate material whose longitudinal direction is made to coincide with the longitudinal direction of the slit groove 17 in the slit groove 17. Insert and bury.

  As shown in FIG. 3C, low-pressure resin injection squeeze dome plates (referred to as SD plates) 21 and 21 as low-pressure resin injection squeeze plates straddle the slit groove 17 at regular intervals. As described above, the outer surface 16b is mounted.

  The low-pressure resin injection squeeze dome plate 21 of this embodiment is present in a concrete structure mainly from an injection hole 21b formed at a substantially central position of the bottom surface portion 21a, as shown in FIGS. In order to inject the resin material into the crack k or the gap to be applied while applying a continuous filling pressure for a long time, a stretchable rubber upper film body 21c is provided.

  Between the upper film body 21c and the bottom surface part 21a, there is provided a resin reservoir space 21d whose volume is changed by the expansion and contraction of the upper film body 21c, and protrudes from the side edge 21f of the bottom surface part 21a. It is comprised so that it may communicate with the resin receiving opening 21e.

  A check valve 21g is provided in the resin passage of the resin receiving port 21e so that the received resin material does not flow backward.

  Further, the squeeze dome plate 21 for low-pressure resin injection has an upper portion so that a dome portion 21h that guides the upper film body 21c so as not to expand too much is integrated with the peripheral portion of the bottom surface portion 21a. It has a substantially hollow sphere shape with a part cut away.

  A hot melt material 22 made of a thermoplastic resin material such as EVA resin is twisted out of the glue gun 23 between the low pressure resin injection squeeze dome plates 21 and 21 on the surface side of the opening 17c of the slit groove 17. Then, the blocking film layer 24 covering the opening 17a is formed by being cooled and hardened.

  Further, as shown in FIG. 3 (d), two liquids are formed in the gap 25 (see FIG. 3 (c)) between the fiber reinforced resin molded body 18 and the inner side surfaces 17b, 17b of the slit groove 17. An epoxy resin material 19a made of a mixed type low-viscosity epoxy adhesive is filled by an injection gun device G, and the epoxy resin material 19a is cured so that the upper and lower side surfaces 18a, 18a of the fiber reinforced resin molded body 18 are The inner surface 17b, 17b of the slit groove 17 is fixed with a larger bonding area than a rod or the like (see FIGS. 1 and 2).

  In the concrete structure reinforcing structure and the concrete structure reinforcing method of the embodiment configured as described above, the disk sander device 20 to which a diamond cutter is attached is used, and the outer surface 16b of the foundation 16 that is a concrete structure is used. A slit groove 17 having a constant depth d1 is cut and formed.

  Since the disc sander device 20 can make the depth of cutting easily constant from the outer surface, construction management with good accuracy is possible.

  Also, when the fiber reinforced resin molded body 18 having the longitudinal direction matched with the longitudinal direction of the slit groove 17 is embedded in the slit groove 17 with the carbon fiber direction also being matched, Since the constant depth from the side surface 16a is constant, the fiber-reinforced resin molded body 18 can be easily positioned.

  Due to the curing of the epoxy resin material 19 a filled in the gap 25, the epoxy resin 19 between the both side surfaces 18 a and 18 a of the fiber reinforced resin molded body 18 and both the inner side surfaces 17 b and 17 b of the slit groove 17 facing each other. Thus, the base 16 and the fiber-reinforced resin molded body 18 are integrated with each other by being fixed to the inner side surfaces 17b and 17b.

  For this reason, compared with the case where only one side is bonded, the bonding area is about twice, and the bonding strength can be increased.

  The fiber reinforced resin molded body 18 is interposed in the slit groove 17 in a longitudinal direction that coincides with the longitudinal direction of the slit groove 17.

  For this reason, there is no portion exposed to the outside, and external force in the peeling direction is not directly applied to the fiber reinforced resin molded body 18.

  In addition, in this embodiment, as shown in FIG. 1, only the slit groove 17 is formed in the outer side surface 16b of the rising portion 16a of the foundation 16 in the substantially horizontal direction. The appearance quality can be improved without being exposed.

  Further, the outer surface 16b of the rising portion 16a of the foundation 16 is not covered over the entire area, and the moisture in the foundation 16 is evaporated, so that a decrease in adhesive force is also suppressed.

  In general, concrete deteriorates with age, but usually, neutralization (oxidation) progresses toward the inner side from the surface, and the compressive strength decreases.

  When the target property to which the present invention is applied has changed over time, the surface layer is often deteriorated.

  For this reason, compared with the case where the flat plate or the like is pasted in the vicinity of the surface layer surface, the slit groove 17 is provided and the fiber reinforced resin molded body 18 is interposed, and the fiber reinforced resin molding is formed in a portion closer to the core. The thing which embeds and fixes the body 18 can improve the reliability of an adhesive state more.

  As described above, according to the present embodiment, the concrete structure reinforcement structure and the concrete structure that are easy to construct and can maintain a reinforcing effect having a strength substantially equal to that of a concrete structure reinforced with reinforcing bars over a long period of time. An object reinforcement method is provided.

上記表１は、この実施の形態で構成されたコンクリート構造物補強構造の破壊荷重試験の結果を、他の構造のコンクリート構造物と比較したものを示している。

Table 1 above shows a result of a destructive load test of the concrete structure reinforcing structure configured in this embodiment compared with a concrete structure of another structure.

  In this destructive load test, a concrete structure having a height and width height of 150 mm × 530 mm × 150 mm is placed on a support base having a dimension between lower test jig support points of 450 mm as shown in FIG. At the same time, it was carried out at a speed of 2 mm / min from above with a pressure table having a dimension between upper test jig fulcrums of 200 mm until the concrete structure broke, and the breaking load was measured once to several times.

  Here, the maximum load of the Amsler tester used for this destructive load test is 100 tons. And the average value of the destruction load which leads to destruction was computed.

  From this test result, when comparing the test results of each reinforcing structure when the breaking load of the unreinforced concrete structure is 1, in the concrete reinforcing structure using the fiber reinforced resin molded body (CCF) 18 having a width of 50 mm, It can be seen that a higher load bearing strength can be obtained than a concrete reinforced structure having reinforcing bars (φ13).

  Moreover, it turns out that the reinforcement effect does not change so much with the concrete reinforcement structure using the fiber reinforced resin molding 18 of width 50mm, and the concrete reinforcement structure using the fiber reinforced resin molding 18 of width 25mm.

  For this reason, even in the building 15 such as the bare foundation 16, the fiber reinforced resin molded body 18 is easily fixed by the epoxy resin 19 in the shallow slit groove 17 having a depth of 1/3 or less. The strength of the foundation 16 can be improved, and the seismic reinforcement can be performed with the foundation having the same strength as the foundation having the reinforcing bars.

  6 to 9 show a concrete structure reinforcing structure and a concrete structure reinforcing method according to Example 1 of this embodiment.

  Note that portions that are the same as or equivalent to those in the above-described embodiment are described with the same reference numerals.

  First, according to the construction sequence of the concrete structure reinforcing method of the first embodiment, as shown in FIG. 6, a building body 15a such as an existing house is placed on and supported by an upper surface portion. A foundation 26 as a concrete structure is provided with the footing part and the lower part of the rising part 26a partially embedded in the ground 10.

  Then, within about 1/3 of the dimension in the thickness direction from the outer surface 26b (depth 30mm / base width of the rising portion) so as to intersect the vertical crack k existing in the rising portion 26a of the base 26 at the intersection point p. 150 mm), the slit groove 17 is formed by the disc sander device 20.

  In the first embodiment, the work of forming the slit groove 17 of less than about ½ from the outer surface 26 b on the rising portion 26 a of the foundation 26 of the building 15 can be performed on the outdoor side of the existing building 15.

  Moreover, since it is not necessary to dig up the footing part of the foundation 26 from the ground, it can be constructed on the rising part 26a exposed to the ground, so that the workability is good.

  Further, the foundation to be reinforced may have a finished surface such as mortar finish or paint finish, and the concrete structure may not be exposed.

  In such a case, as in the prior art, when the plate material or the like is to be directly pasted near the surface of the foundation 26, the process of pulverizing and peeling the finished surface such as mortar finish or paint finish is the previous process. Necessary.

  On the other hand, in the first embodiment, the slit groove 17 having a thickness of about the thickness of the fiber reinforced resin molded body 18 is provided on the foundation 26 with an expectation of the finished thickness, so that a conventional finished surface can be suspended. The peeling process can be omitted.

  Therefore, it is possible to reduce the number of construction steps and suppress an increase in construction cost.

  After drying and curing the periphery of the slit groove 17, the fiber reinforced resin molded body 18 is then embedded and embedded in the slit groove 17 with the in-plane and outward directions being the vertical direction, as shown in FIG. 7. The

  As described above, even when the fiber reinforced resin molded body 18 having the longitudinal direction aligned with the longitudinal direction of the slit groove 17 is interposed in the slit groove 17 at the construction site, the slit is also embedded. Since the constant depth d1 from the outer surface of the groove 17 is constant in the longitudinal direction, the fiber-reinforced resin molded body 18 can be positioned easily.

  Then, as shown in FIG. 8, squeeze dome plates (SD plates) 21 and 21 for low-pressure resin injection as squeeze plates for low-pressure resin injection straddle the slit groove 17 and the crack k at regular intervals. And attached to the outer surface 26b.

  Further, between the low-pressure resin injection squeeze dome plates 21 and 21, a hot melt material made of a thermoplastic resin material made of EVA resin is provided on the surface of the opening 17a of the slit groove 17 and the surface of the opening of the crack k. 22 is twisted out from the glue gun 23, and the opening 17 a and the opening surface side of the crack k are covered with the closing film layer 24 of the hot melt material 22.

  After the blocking film layer 24 is cooled and hardened, as shown in FIG. 8, a gap 25 (see FIG. 8) between the fiber reinforced resin molded body 18 and the inner side surfaces 17b and 17b of the slit groove 17 is obtained. 3 (see (c)), the two-component mixed type epoxy resin material 19a is filled by the injection gun apparatus G.

  By curing the epoxy resin material 19a, both side surfaces of the fiber reinforced resin molded body 18 are fixed to the inner side surfaces 17b and 17b of the slit groove 17 (see FIGS. 1 and 2).

  In the first embodiment, the low-pressure resin injection squeeze dome plates 21 as shown in FIGS. 4 and 5 are used at intervals of 30 cm to 40 cm, respectively.

  In this low-pressure resin injection squeeze dome plate 21, when the tip of the injection gun device G is inserted into the resin receiving port 21e and the epoxy resin material 19a is injected into the resin reservoir space 21d, the upper film is formed. The body 21c expands, and the capacity of the resin reservoir space 21d increases.

  The received epoxy resin material 19a does not flow back by the check valve 21g provided in the resin passage of the resin receiving port 21e.

  For this reason, over a long period of time from the injection hole 21b formed at the substantially central position of the bottom surface portion 21a to the crack k of the concrete structure or the gap 25 with the fiber reinforced resin molded body 18 in the slit groove 17, The epoxy resin material 19a is filled while a continuous filling pressure is applied.

  Thus, the epoxy resin material 19a filled in the gap 25 between the fiber reinforced resin molded body 18 and the slit groove 17 is intersected with the epoxy resin material 19a filled in the space in the crack k. It is mixed in the vicinity and filled so as to be integrated in a cured state.

  After the curing, as shown in FIG. 9, the squeeze dome plate 21 for low-pressure resin injection is removed, and the surface of the blocking membrane layer 24 is prepared with a finishing material such as a hot melt material 22 to repair and reinforce the work. Complete.

  Next, the function and effect of the first embodiment will be described.

  In the concrete structure reinforcing structure and the concrete structure reinforcing method of Example 1 configured as described above, in addition to the function and effect of the above embodiment, the fiber reinforced resin molded body 18 and the slit groove 17 are further provided. The reinforcing work for filling the gap 25 with the epoxy resin material can be performed simultaneously with the repair work for filling the space in the crack k with the epoxy resin material.

  In addition, a common jig or construction tool such as the epoxy resin material 19a used for filling, the low-pressure resin injection squeeze dome plate 21 and the injection gun apparatus G can be used.

  For this reason, the workability of the construction is good, and the epoxy resin material 19a made of the same material filled simultaneously from the squeeze dome plates 21 and 21 for injecting the low-pressure resin is the fiber-reinforced resin molded body 18. In addition to the affinity for, the affinity between the epoxy resin materials 19a at the intersection p where the crack k and the slit groove 17 intersect is good, and the strength after curing is good without generating an interface. be able to.

  Further, by using the low-pressure resin injection squeeze plate 21 for filling the epoxy resin material 19a, a continuous filling pressure can be applied during filling.

  For this reason, the space | gap between the said fiber reinforced resin molded object 18 and the slit groove | channel 17, especially the space | gap between the back side end surface of the fiber reinforced resin molded object 18, and the slit groove | channel 17 bottom, or the detail of the crack k. In addition, the epoxy resin material 19a gradually reaches and spreads the filled epoxy resin material evenly to the minute gaps, whereby a stronger adhesive force can be given.

  Further, even if the epoxy resin material 19a is hardened and shrinks in volume, a continuous filling pressure can be applied for a long time, so that the volume reduction can be compensated.

  For this reason, desired adhesive force can be given, without generating sink marks in the epoxy resin material 19a after hardening. In particular, in Example 1, in addition to the gap between the fiber reinforced resin molded body 18 and the slit groove 17, the gap in the crack k is filled with the epoxy resin material 19a, so that the filling amount is large. Since the volume reduction is large, the low-pressure resin injection squeeze dome plate 21 can be used to substantially completely fill these voids at the time of curing to give a desired adhesive strength.

  Furthermore, in this Example 1, the fiber reinforced resin molded body 18 embedded in the slit groove 17 so as to intersect with the epoxy resin material 19a in the crack k existing in the rising portion 26a of the foundation 26 is provided. The epoxy resin material 19a to be bonded is integrated in the cured state.

  Normally, there is a high probability that a new crack will occur again around the portion where the crack k has occurred, such as load concentration.

  In Example 1, the epoxy resin 19 used when repairing the crack k and the epoxy resin 19 used for fixing the fiber-reinforced resin molded body 18 that reinforces the periphery are in the vicinity of the intersection (intersection point p). The fiber reinforced resin moldings 18 are bonded together so as to be integrated with the crack k crossed.

  Therefore, the fiber reinforced resin molded body 18 is positioned in a portion where a new crack is likely to occur again, and can be reinforced in a wide range in the horizontal direction, and the crack k in the crack k along the crack k generated mainly in the vertical direction. Compared with the case where only filling repair is performed, the strength is further improved.

  In this way, the same work procedure effectively reinforces the surrounding area after repairing, preventing the recurrence of cracks, and can also reinforce against the shearing stress in the vertical direction. can do.

  Other configurations and operational effects are substantially the same as those of the above-described embodiment, and thus the description thereof is omitted.

  10 and 11 show a concrete structure reinforcing structure and a concrete structure reinforcing method according to Example 2 of this embodiment.

  In addition, the same code | symbol is attached | subjected and demonstrated about the same thru | or equivalent part as the said embodiment and Example 1. FIG.

  As shown in FIG. 10, the fiber reinforced resin molded body 28 as a flat plate material used in the concrete structure reinforcing structure of the second embodiment has a plurality of resin insertion holes 28 b at regular intervals in the longitudinal direction. An opening is formed substantially at the center in the width direction so as to penetrate both the upper and lower side surfaces 28a, 28a.

  Next, the effect of the concrete structure reinforcement structure and concrete structure reinforcement method of Example 2 will be described.

  In Example 2, in addition to the operational effects of the embodiment and Example 2, as shown in FIG. 11, the epoxy resin 19 in the slit groove 17 has a plurality of fiber reinforced resin molded bodies 28. It penetrates into the resin insertion holes 28b, and is cured.

  For this reason, the epoxy resin 19 on the upper and lower side surfaces 28a, 28a side of the fiber reinforced resin molded body 28 is connected and integrated through these resin insertion holes 28b, and is bonded to the upper and lower side surfaces 28a, 28a side. It is possible to make it difficult for the epoxy resins 19 and 19 to be peeled off.

  Other configurations and functions and effects are substantially the same as those of the above-described embodiment and Example 1, and thus description thereof is omitted.

  FIG. 12 shows a concrete structure reinforcing structure and a concrete structure reinforcing method according to Example 3 of this embodiment.

  In addition, the same code | symbol is attached | subjected and demonstrated about the same thru | or equivalent part as the said embodiment and Example 1,2.

  In the concrete structure reinforcing structure and the concrete structure reinforcing method of the third embodiment, the reinforcing bar base 36 of the reinforcing bar structure in which the reinforcing bar portion 37 is provided as the foundation is the reinforcing structure of the concrete structure of the above embodiment. A structure in which the strength of the base 16 is easily improved by fixing the fiber-reinforced resin molded body 18 with an epoxy resin 19 in a shallow slit groove 17 having a depth of 1/3 or less is applied.

  In the concrete structure reinforcing structure and the concrete structure reinforcing method of Example 3 configured as described above, in addition to the operation and effect of the above-described embodiment, the reinforcing bar base 36 having the reinforcing bar portion 37 may be used. By setting the depth of the slit groove 17 to be less than 1/2 or within 1/3 of the width of the rising portion, the internal rebar portion 37 is cut by the disc sander device 20 to which the diamond cutter is attached. There is no fear. After the construction, the epoxy resin 19 integrally fixes the fiber reinforced resin molded body 18 in the slit groove 17 in an interposed state, so that the strength of the foundation 36 is further improved and the earthquake resistance is easily improved. Can be.

  In addition, since the epoxy resin 19 and the fiber reinforced resin molded body 18 fixed in the slit groove 17 have corrosion resistance, for example, the rebar portion 37 is caused by the occurrence of rust or the like. Even if it is partially or totally corroded, the reinforcement can provide a strength substantially equal to that of the normal reinforcing bar portion 37 over a long period of time, and the reinforcing effect can be maintained. Other configurations and functions and effects are substantially the same as those of the above-described embodiment and Example 1 or 2, and thus description thereof is omitted.

  FIG. 13 shows a concrete structure reinforcing structure and a concrete structure reinforcing method according to Example 4 of this embodiment.

  In addition, the same code | symbol is attached | subjected and demonstrated about the same or equivalent part as the said embodiment and Examples 1-3.

  In the concrete structure reinforcing structure and the concrete structure reinforcing method according to the fourth embodiment, a plurality of through holes 47, 48 for piping penetrating inside and outside are formed in the rising portion 46a of the foundation 46 of the building 15. A pipe pipe (not shown) is configured to be inserted into the through holes 47, 48.

  The slit grooves 17 are cut and formed substantially horizontally above the pipe through holes 47, 48, so that the fiber reinforced resin molded bodies 18 are embedded, and the fiber reinforced resin molded bodies 18 The upper and lower side surfaces 18a, 18a are fixed to the inner side surfaces 17b, 17b of the slit groove 17 by the filled epoxy resin 19.

  In the concrete structure reinforcing structure and the concrete structure reinforcing method of Example 4 configured as described above, in addition to the functions and effects of the embodiment and Examples 1 to 3, after the foundation 46 is constructed, the piping Even if the through-holes 47, 48... For the openings are formed, the slit grooves 17 are formed in the upper portions of the through-holes 47, 48. By doing so, the reinforcement which improves the intensity | strength of the foundation 46 can be performed easily.

  Moreover, in the fourth embodiment, a single fiber reinforced resin molded body 18 is embedded and fixed horizontally in the slit groove 17 over the plurality of piping through holes 47, 48. Since it can be performed, for example, the construction is easier than the case where reinforcement is required for each of the piping through holes 47, 48.

  Other configurations and functions and effects are substantially the same as those of the above-described embodiment and Examples 1 to 4, and thus description thereof is omitted.

  FIG. 14 shows a concrete structure reinforcing structure and a concrete structure reinforcing method according to Example 5 of this embodiment.

  In addition, the same code | symbol is attached | subjected and demonstrated about the same or equivalent part as the said embodiment and Examples 1-4.

  In the concrete structure reinforcing structure and the concrete structure reinforcing method of the fifth embodiment, the side wall portion of the building 15 is constituted by the RC concrete wall portion 56 as a concrete structure.

  In the RC concrete wall portion 56, after the construction, a part of the wall surface 56a is removed to provide an entrance / exit portion or a window portion, so that an opening portion 56b may be formed.

  In this case, each of the peripheral edge portions 56c, 56d, 56e,... Of the opening 56b is formed with a slit groove 17 that is spaced apart from the cutting line that forms the opening 56b by a predetermined distance and cut along the cutting line. The

  The fiber reinforced resin molded body 18 is embedded, and both side surfaces 18a and 18a of the fiber reinforced resin molded body 18 are filled in the inner side surfaces 17b and 17b of the slit grooves 17, respectively. 19 is configured to be fixed.

  Next, the effect of the concrete structure reinforcement structure and concrete structure reinforcement method of Example 5 will be described.

  In Example 5, in addition to the operational effects of the embodiment and Examples 1 to 4, when the opening 56b is further formed, the peripheral portions 56c, 56d, 56e, etc. are easily reinforced. I can do it. The order of reinforcement construction may be before or after the opening 56b is formed.

  Other configurations and functions and effects are substantially the same as those of the above-described embodiment and Examples 1 to 4, and thus description thereof is omitted.

  The embodiment of the present invention has been described in detail above with reference to the drawings. However, the specific configuration is not limited to this embodiment, and design changes that do not depart from the gist of the present invention are not limited to this embodiment. Included in the invention.

  That is, in the first embodiment, the description has been made by using the fiber reinforced resin molded body 18 which is a carbon fiber reinforced plastic plate in which carbon fibers are arranged in the longitudinal direction as the flat plate material. For example, aramid fiber reinforced plastic plate (width 50 mm × thickness 1.2 mm, width 25 mm × thickness 1.2 mm, etc.), glass fiber reinforced plastic plate (width 50 mm × thickness 1.2 mm, width 25 mm × thickness 1) .2 mm), ceramic fiber reinforced plastic plate (width 50 mm × thickness 1.2 mm, width 25 mm × thickness 1.2 mm, etc.), or a resin molded body formed by mixing these fibers, iron plate ( Width 50 mm x thickness 1.0 mm, width 25 mm x thickness 1.0 mm, etc.), stainless steel plate (width 50 mm x thickness 1.0 mm, width 25 mm x thickness 1.0 mm, etc.), etc. Epoxy tree If it has a bonding area fixed by a fat material and receives the shear stress of the concrete structure so as to disperse it in a plane in the in-plane direction, the shape, material, The quantity is not particularly limited.

  Alternatively, the epoxy resin material 19 a may be injected into the slit groove 17 in advance, and the fiber reinforced resin molded body 18 may be inserted into the slit groove 17 later.

  Furthermore, in the concrete structure reinforcing structure of Example 2, a plurality of resin insertion holes 28b are formed in the fiber reinforced resin molded body 28. The size and number of these resin insertion holes 28b are reinforced. Any setting may be used as long as the effect is not significantly reduced.

  And in the said Example 4, although the one fiber reinforced resin molded object 18 was embed | buriedly fixed in the slit groove | channel 18 horizontally over the upper part of said several through-holes 47,48 ... for piping, However, the present invention is not limited to this, and the lower portion and the periphery of the side surface of the through hole for piping may be similarly reinforced.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a front view of a foundation portion of a building in a concrete structure reinforcing structure and a reinforcing method according to a preferred embodiment of the present invention. It is sectional drawing of the foundation in the position along the AA line in FIG. 1 with the concrete structure reinforcement structure and reinforcement method of embodiment. An example of the reinforcement construction method used for the concrete structure reinforcement structure of embodiment is shown, (a) is a typical perspective view explaining a mode that a slit groove is formed using a disk sander device, (b) is The schematic perspective view explaining a mode that a fiber reinforced resin molding is embed | buried, (c) is a schematic perspective view explaining a mode that the opening part of a slit groove is obstruct | occluded with a thermoplastic resin material, (d). These are typical perspective views explaining a mode that it fills with an epoxy resin material. It is a longitudinal cross-sectional view explaining the structure of the squeeze dome plate for low-pressure resin injection | pouring used for the concrete structure reinforcement structure and reinforcement method of embodiment. It is sectional drawing explaining a mode that resin material is inject | poured using the squeeze dome plate for low-pressure resin injection | pouring with the concrete structure reinforcement structure and reinforcement method of embodiment. BRIEF DESCRIPTION OF THE DRAWINGS It is a perspective view explaining a mode that a slit groove | channel is formed in the foundation of a building using the disk sander apparatus by the concrete structure reinforcement structure and reinforcement method of Example 1 of embodiment. It is a perspective view explaining a mode that a fiber reinforced resin molding is embed | buried with the concrete structure reinforcement structure and reinforcement method of Example 1. FIG. The perspective view explaining a mode that the opening part of a slit groove | channel is obstruct | occluded with a thermoplastic resin material and the resin material is filled using the low-pressure resin injection squeeze dome plate in the concrete structure reinforcement structure and the reinforcement method of Example 1. It is. It is a perspective view which shows the external appearance which removed the squeeze dome plate for low-pressure resin injection | pouring with the concrete structure reinforcement structure and reinforcement method of Example 1. FIG. It is a top view of a fiber reinforced resin molding by the concrete structure reinforcement structure and reinforcement method of Example 2 of an embodiment. It is sectional drawing of the foundation in the position equivalent to the position along the AA line in FIG. 1 by the concrete structure reinforcement structure and reinforcement method of Example 2. FIG. It is sectional drawing of the foundation in the position equivalent to the position along the AA line in FIG. 1 by the concrete structure reinforcement structure and reinforcement method of Example 3 of an embodiment. It is a front view of the foundation part of a building by the concrete structure reinforcement structure and reinforcement method of Example 4 of an embodiment. It is a front view which shows a mode that an opening part is formed in RC wall part of RC building by the concrete structure reinforcement structure and reinforcement method of Example 5 of embodiment. It is a schematic diagram of the destructive load test of a concrete structure reinforcement structure. It is the longitudinal cross-sectional view of a foundation in the concrete structure reinforcement structure of one prior art example. It is the longitudinal cross-sectional view of a foundation in the concrete structure reinforcement structure of another conventional example. It is the longitudinal cross-sectional view of a foundation in the concrete structure reinforcement structure of another conventional example.

Explanation of symbols

15 Building 16, 26, 36, 46 Foundation (concrete structure)
16a, 26a Standing portions 16b, 26b Outside surface (outside surface)
17 Slit grooves 17b, 17b Inner side surface 18 Fiber reinforced resin molding (flat plate material)
19 Epoxy resin 19a Epoxy resin material 21 Low pressure resin injection squeeze dome plate (low pressure resin injection squeeze plate)
56 RC concrete wall (concrete structure)
k crack p intersection

Claims (5)

In the slit groove having a certain depth from the outer surface of the concrete structure, the longitudinal direction is made to coincide with the longitudinal direction of the slit groove, and the shear stress of the concrete structure is dispersed in a plane shape in the in-plane and outward directions. The slit is embedded with a flat plate material, which is a long rectangular fiber reinforced resin molded body having the strength to be received and having the direction of the carbon fiber aligned along the longitudinal direction of the slit groove. Each side surface of the flat plate material is fixed to the inner side surface of the slit groove by an epoxy resin material filled in a gap between the both inner side surfaces of the groove and the opposite side surfaces of the flat plate material. Concrete structure reinforcement structure characterized by. The concrete structure is an unfounded foundation of a building, and the transverse slit groove is formed from the outer surface to be less than about 1/2 of the thickness direction dimension so as to cross a crack existing at the rising portion of the foundation. The flat plate material is embedded in the slit groove with the in-plane / outside direction being the vertical direction, and an epoxy resin material filled in a gap between the flat plate material and the slit groove is formed in the crack groove. 2. The concrete structure reinforcing structure according to claim 1, wherein the concrete structure is filled so as to be integrated in a cured state until reaching the space . The flat plate material is a long rectangular fiber reinforced resin molded body having a strength for receiving the shear stress of the concrete structure in a planar manner in the in-plane and out-of-plane directions, and is fixed from the outer surface of the concrete structure. By aligning the longitudinal direction along the longitudinal direction of the slit groove in the slit groove formed by cutting at a depth, the carbon fiber direction is aligned along the longitudinal direction of the slit groove. The epoxy resin material is filled in the gap between the flat plate material and the inner surface of the slit groove, and both side surfaces of the flat plate material are fixed to the inner surface of the slit groove by curing the epoxy resin material. A method for reinforcing a concrete structure, characterized in that: The concrete structure is an unfounded foundation of a building, and a slit groove having a dimension less than about 1/2 of the thickness direction dimension is formed from an outer surface so as to intersect with a crack existing at a rising portion of the foundation, In the lateral slit groove, the flat plate material is embedded with the in-plane / outward direction being the vertical direction, and an epoxy resin material is filled in the gap between the flat plate material and the slit groove, and The method for reinforcing a concrete structure according to claim 3 , wherein both epoxy resin materials are united in a cured state together with the filled epoxy resin material in the space . The concrete structure reinforcing method according to claim 3 or 4, wherein a squeeze plate for low-pressure resin injection is used for filling the epoxy resin material .

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