JP5166134B2 - Installation structure of ultra-high-strength fiber reinforced concrete plates in concrete structures - Google Patents

Description

INDUSTRIAL APPLICABILITY The present invention enables construction of a highly durable concrete structure, and in a concrete structure (frame) for placing concrete on site, it is highly durable for covering the concrete surface placed on site. It is related with the installation structure of the super-high-strength fiber reinforced concrete board in the concrete structure used for a flexible thin-walled formwork board.

As a first example of the installation structure of the super high strength fiber reinforced concrete plate in this type of concrete structure, there is a technique disclosed in Japanese Patent No. 4078927 shown in FIGS. 6 (a) and 6 (b). .
Explaining this, the cement in the case where the flat cement boards 1a and 1b are arranged adjacently in the vertical and horizontal directions, and the concrete 2 is placed behind the cement boards 1a and 1b to be used as permanent molds. In the board joining method, a space portion 4 is formed to expand outward in the joint portion 3 of the flat cement board 1a, 1b. In the space portion 4, an epoxy resin main agent, a curing agent, For permanent molds that are bonded and fixed between adjacent cement boards 1a and 1b by filling adhesives 5 and 5A composed of a mixture with inorganic particulates such as silica sand and curing the adhesives 5 and 5A. In the cement board joining method, before the concrete 2 is placed, the adhesive 5 is partially filled in the space portion 4 to ensure water-stopping, and the concrete 2 is placed. rear , To fill the adhesive 5A to the rest of the space portion 4. That is, as shown in FIG. 6A, before the concrete 2 is placed on the back side of the cement boards 1a and 1b, the space 5 is filled with the adhesive 5, and when the concrete 2 is placed, As shown in FIG. 6B, when the adhesive 5A is filled in the space 4 and the adhesive 5A is cured, the cement boards 1a and 1b are bonded and fixed, and the joining is completed. According to the joining method configured as described above, the adhesive 5 is filled before the concrete 2 is placed, and the adhesive 5A is filled after the concrete 2 is placed. However, it can be finished neatly.

As a second example in the prior art, there is a technique disclosed in Japanese Patent No. 3894738 shown in FIG.
Explaining this, as shown in FIG. 7 (a), the embedded formwork board 6 includes a plate-like main body portion 7 made of a hardened body of a specific composition and one side of the main body portion 7, that is, post-cast concrete. And a large number of protrusions 8 provided on the surface on the side where is inserted. A plurality of main body parts 7 are installed with their end faces (not shown) butted to form an embedded formwork, and the joint between the main body parts 7 is standardly structured to be filled with an epoxy resin-based adhesive ( Not shown). As shown in FIG. 7 (b), each granule constituting a large number of protrusions 8, such as crushed stone or ceramic pulverized material, is partially embedded on one side of the main body 7, and the bottom surface on one side of the main body 7. It is arranged and fixed in a state protruding from 9 by an appropriate height. In addition, you may form many projection bodies 8 by forming uneven | corrugated shape in the single side | surface of main-body part 7 itself instead of using granules, such as a crushed stone.
The embedded formwork board 6 is used, for example, in a form as shown in FIG. In FIG. 7 (c), the concrete structure 10 includes two embedded formwork boards 6 and 6 arranged facing each other with one side having a large number of protrusions 8 facing inward, It is composed of post-cast concrete 11 that is driven between two embedded formwork boards 6 and 6. The embedded formwork boards 6, 6 remain as constituent parts of the concrete structure 10 without being removed even after the post-cast concrete 11 is hardened. The height of the multiple protrusions 8 formed on one side of the embedded formwork board 6 is 2 mm or more, preferably 5 to 20 mm on average. Here, the average value of the heights of the large number of protrusions 8 means that the height of only one portion of the large number of protrusions 8 on one side of the embedded formwork board 6, that is, the portion excluding the bottom surface 9. The height when flattened to be the same, that is, the projection surface of a large number of projections 8 is the same at all points on the projection surface while keeping the total volume of these projections 8 constant. The said height when flattened so as to have a height. And if the average value of the height of many protrusions 8 is less than 2 mm, the adhesive force between the embedded formwork board 6 and the post-cast concrete 11 decreases, and an adhesive force of 0.5 MPa or more cannot be obtained. In this case, although depending on the thickness of the post-cast concrete 11, the post-cast concrete 11 may be peeled off.

Further, as a third example in the conventional technique, there is a technique of an installation structure of an ultra-high strength fiber reinforced concrete plate in a concrete structure shown in FIG.
Explaining this, the ultra high strength fiber reinforced concrete 12 has a compressive strength characteristic value of 150 N / mm ² or more, a crack generation strength characteristic value of 4 N / mm ² or more, and a tensile strength characteristic value of 5 N / mm ^2. It is the cementitious composite material which performed the above fiber reinforcement. Reference numeral 13 denotes a joint, which has a gap S1 having a width of 0 to 2 (mm), for example. The resin injection opening 13a of the joint portion 13 has, for example, a width length S2 of, for example, 4 to 6 (mm), and is injected with an epoxy resin adhesive 15. Reference numeral 14 denotes a protrusion, and a large number of the protrusions are embedded in the surface of the ultra high strength fiber reinforced concrete 12. And the position and space | interval of the joint of the ultra high strength fiber reinforced concrete 12 are determined in consideration of the shape and construction method of the applied structure. The joint portion 13 of the ultra high strength fiber reinforced concrete 12 has a butt structure shown in FIG. 8, and an epoxy resin adhesive 15 is used to bond the joint portion 13 of the ultra high strength fiber reinforced concrete 12. Although the shape and dimensions of the ultra high strength fiber reinforced concrete 12 may be determined in consideration of the shape of the structure to be applied and the construction method, it is desirable to reduce the joint portion 13 from the viewpoint of durability. In general, the joints 13 are bonded sequentially while the ultra-high-strength fiber reinforced concrete 12 is installed so that the resin injection opening 13a has a joint structure in the reverse direction so that the adhesive can be appropriately filled. The epoxy resin-based adhesive 15 uses a material whose post-curing property conforms to the quality standard of epoxy resin-based adhesive for precast concrete (for cross-linking) of the Japan Society of Civil Engineers. The pre-cured property of the epoxy resin-based adhesive 15 is Determined in consideration of workability.

Since the conventional technology has the above-described configuration, the following problems existed. That is, according to the first to third examples of the prior art, the flat cement boards 1a and 1b, the embedded formwork board 6 or the ultrahigh strength fiber reinforced concrete 12 are all excellent in durability. Even if it is possible to satisfy the design service life of the structure, the joint portions where these are abutted with each other are filled with the epoxy resin adhesive 5, 5A, 15 in the gaps or spaces, and thus the above-mentioned When the flat cement boards 1a, 1b, etc. are exposed to ultraviolet rays, the epoxy resin adhesives 5, 5A, 15 filled in the joints are discolored in a short period of time, resulting in deterioration of strength. Due to this deterioration in strength, the adhesive surface peels off between the epoxy resin adhesives 5, 5A, 15 and the flat boards 1a, 1b, etc., which are adherends, at the joints, and external forces due to earthquakes and the like are generated. When applied to the joint, the epoxy resin adhesives 5, 5A, 15 may drop off from the joint. As described above, once the adhesive surface is peeled between the epoxy resin adhesives 5, 5A, 15 and the flat boards 1a, 1b, etc., to be bonded, in the joint portion, the fine adhesive surface There is a problem that the deterioration factor of the concrete structure easily infiltrates with the rain water etc. into the gap due to peeling of the concrete and promotes the deterioration of the concrete structure. Further, according to the first to third examples of the prior art, it is necessary to provide the opening portion 13a and the space portion 4 in the joint portion in order to reliably fill the joint portion with the epoxy resin adhesive 5, 5A, 15. is there. The epoxy resin adhesives 5, 5A and 15 filled in the opening 13a and the space 4 have a larger volume than the amount of the epoxy resin adhesive in other portions of the joint, and are easily affected by ultraviolet rays. The peeling phenomenon is remarkable. Therefore, even if an epoxy resin adhesive having a small volume shrinkage ratio after curing is employed, it is difficult to avoid the volume shrink phenomenon as a change with time, and the volume shrink phenomenon is caused by the epoxy resin adhesives 5, 5A, 15 And the flat board boards 1a, 1b, etc., which are the adherends, cause the peeling of the adhesive surface, and thus there is a problem of promoting the deterioration of the concrete structure.

The installation structure of the ultra-high-strength fiber reinforced concrete plate in the concrete structure according to the present invention was invented to solve the above problems, and in order to ensure high durability of the joint structure, ultraviolet On the back of ultra-high-strength fiber reinforced concrete that does not hit, a seal structure with a hook-and-loop fastener filled with a flexible adhesive that has been confirmed to have quality assurance and durability for over 40 years, for example, is placed. Providing a seal structure that simplifies the construction by enabling temporary fixation of the high-strength fiber reinforced concrete board. Specifically, a surface fastener is installed in advance on the ultra-high-strength fiber reinforced concrete body. First, attach one side of the hook-and-loop fastener to the ultra high-strength fiber reinforced concrete mounting position, and then fill the space in the hook-and-loop fastener with a flexible adhesive such as epoxy resin. A characterized in that the ultra high strength fiber reinforced concrete by forming the surface fastener for example a combination of mushroom-shaped projections and slidable, following configuration is established from the means.

That is, according to the first aspect of the present invention, there are provided a concrete structure (frame), and a plurality of anchor bolts for fixing and arranging an ultra-high strength fiber reinforced concrete plate mounting bracket on the surface of the concrete structure (frame). An ultra-high-strength fiber reinforced concrete plate that is fixed to the surface of the ultra-high-strength fiber-reinforced concrete plate mounting bracket and that is engaged with the one fastener portion and has a cylindrical projection group formed on the other upper surface. A hook-and-loop fastener composed of the other fastener portion fixed to one upper surface of the tape, an adhesive interposed between the one fastener portion and the other fastener portion, and filled between the concrete structure and the ultra-high-strength fiber reinforced concrete plate. It is characterized by comprising an injecting agent.

According to invention of Claim 2, it consists of a concrete structure (frame) and a plurality of anchor bolts for fixing and arranging a super high strength fiber reinforced concrete plate mounting bracket on the surface of the concrete structure (frame). One of the ultra-high-strength fiber reinforced concrete plates that is fixed to the surface of the ultra-high-strength fiber-reinforced concrete plate mounting bracket and that is engaged with the one fastener portion and has a cylindrical protrusion group on the other upper surface. A hook-and-loop fastener composed of the other fastener portion fixed to the upper surface of the steel sheet, and an injection with an adhesive interposed between the one fastener portion and the other fastener portion and filled between the concrete structure and the ultra-high-strength fiber reinforced concrete plate And a plurality of concrete anchors for driving and fixing the ultra-high strength fiber reinforced concrete plate to the surface of the concrete structure. Characterized by comprising in the bolt.

According to a third aspect of the present invention, in the first or second aspect of the present invention, one and the other fastener portions of the surface fastener are constituted by a substrate and a protruding piece group formed integrally with the substrate, and temporarily. When fixing, the protruding piece group of the one and the other fastener portion is engaged and fixed.

According to a fourth aspect of the present invention, in the invention according to the first or second aspect, in the hook-and-loop fastener, the protruding piece of the other fastener portion is a mushroom-shaped protruding piece.

Since the installation structure of the ultra high strength fiber reinforced concrete plate in the concrete structure according to the present invention has the above configuration, the following effects are obtained.
That is, according to the first aspect of the present invention, there are provided a concrete structure (frame), and a plurality of anchor bolts for fixing and arranging an ultra-high strength fiber reinforced concrete plate mounting bracket on the surface of the concrete structure (frame). An ultra-high-strength fiber reinforced concrete plate that is fixed to the surface of the ultra-high-strength fiber-reinforced concrete plate mounting bracket and that is engaged with the one fastener portion and has a cylindrical projection group formed on the other upper surface. A hook-and-loop fastener composed of the other fastener portion fixed to one upper surface of the tape, an adhesive interposed between the one fastener portion and the other fastener portion, and filled between the concrete structure and the ultra-high-strength fiber reinforced concrete plate. providing an installation structure of at ultra high strength fiber reinforced concrete plate concrete structure characterized by comprising at the infusate that That.
Because of this structure, ultra-high-strength fiber reinforced concrete with non-land surface adjustment plastic spacers, etc., fixed to the surface of the concrete structure (frame) with a surface fastener between the ultra-high-strength fiber reinforced concrete plate The plate can be temporarily fixed, so that the injection agent does not leak from the joint space between the ultra-high-strength fiber reinforced concrete plates , and the repair work can be performed quickly from the beginning to the step of fixing the concrete anchor bolt. Simplify and high quality, improve the safety of construction, and have intervened adhesive in the hook-and-loop fastener, so deterioration factors such as ultraviolet rays, water (H ₂ O) and carbon dioxide (CO ₂ ) Does not enter the inside, and the durability of the surface fastener can be improved.

According to invention of Claim 2, it consists of a concrete structure (frame) and a plurality of anchor bolts for fixing and arranging a super high strength fiber reinforced concrete plate mounting bracket on the surface of the concrete structure (frame). One of the ultra-high-strength fiber reinforced concrete plates that is fixed to the surface of the ultra-high-strength fiber-reinforced concrete plate mounting bracket and that is engaged with the one fastener portion and has a cylindrical protrusion group on the other upper surface. A hook-and-loop fastener composed of the other fastener portion fixed to the upper surface of the steel sheet, and an injection with an adhesive interposed between the one fastener portion and the other fastener portion and filled between the concrete structure and the ultra-high-strength fiber reinforced concrete plate And a plurality of concrete anchors for driving and fixing the ultra-high strength fiber reinforced concrete plate to the surface of the concrete structure. The concrete structure characterized by comprising between the bolts to provide an installation structure of at ultra high strength fiber reinforced concrete plate.
Since this structure is adopted, in addition to the effect of the invention described in claim 1, the super high strength fiber reinforced concrete plate is finally fixed to the concrete structure with the concrete anchor bolt, so that the repair work is ensured with high quality. There is an effect that can be.

According to a third aspect of the present invention, when the one and the other fastener portions of the surface fastener are constituted by a substrate and a group of protrusion pieces integrally formed on the substrate and are temporarily fixed, the protrusion pieces of the one and the other fastener portions. The installation structure of the ultra-high-strength fiber reinforced concrete plate in the concrete structure according to claim 1 or 2, wherein the group is engaged and fixed.
Since it was set as such a structure, in addition to the effect of the invention of Claim 1 or 2, without deteriorating the deterioration factor substance of the concrete structure (frame) which flows in from the joint space of an ultra high strength fiber reinforced concrete board There is an effect that it can be easily blocked.

According to the fourth aspect of the present invention, whereas at the surface fastener, in greater to claim 1 or 2 concrete structure according protruding pieces of the other fastener portion is characterized by comprising mushroom-like projection piece Provide an installation structure of high-strength fiber reinforced concrete board.
Since it was set as such a structure, in addition to the effect of the invention of Claim 1 or 2, there exists an effect of raising the adhering force of one surface fastener of the surface fastener, and the other fastener part.

Hereinafter, an embodiment of an installation structure of an ultra-high-strength fiber-reinforced concrete plate in a concrete structure according to the present invention will be described in detail with reference to FIGS.

FIG. 1 is a vertical sectional view showing an installation structure of an ultra-high-strength fiber reinforced concrete plate in a concrete structure according to the present invention.
FIG. 2 is an enlarged cross-sectional view showing an internal configuration of a hook-and-loop fastener applied to an installation structure of an ultra-high-strength fiber reinforced concrete plate in a concrete structure and the other ultra-high-strength fiber reinforced concrete plate.
FIG. 3 is a plan view showing the shape of the upper surface of one ultra-high-strength fiber-reinforced concrete plate and the surface shape of the other fastener portion.
FIG. 4 is an enlarged view showing a state in which the butt joint space is generated when the other ultra-high-strength fiber reinforced concrete plate moves from the state in which the other ultra-high-strength fiber reinforced concrete plate is abutted as shown in FIG. It is sectional drawing.
FIG. 5 is an enlarged partial cross-sectional view showing a state in which a concrete degradation factor flows from the butt joint space shown in FIG.

Reference numeral 16 denotes a concrete structure (frame), which is an existing structure, for example, a water and sewage concrete structure or a bridge concrete structure, which is eroded by hydrogen sulfide or the like and deteriorated by exposure to wind and rain. The site will be damaged.

17 is a plastic spacer for unevenness adjustment arranged in contact with the surface of the concrete structure 16. When repairing the concrete structure, an adjustment plate or the like for fixing an ultrahigh strength fiber reinforced concrete plate described later is used. It functions as a pedestal to be fixed.

Reference numeral 18 denotes a super high strength fiber reinforced concrete plate mounting bracket, which is made of a metal material such as stainless steel. Here, the ultra high strength fiber reinforced concrete plate is fiber reinforced with a compressive strength characteristic value of 150 N / mm ² or more, a crack generation strength characteristic value of 4 N / mm ² or more, and a tensile strength characteristic value of 5 N / mm ² or more. It is the cementitious composite board which performed. Reference numeral 19 denotes an adjusting plate made of a metal material such as stainless steel, which is fixed to the surface of the ultrahigh strength fiber reinforced concrete plate mounting bracket 18 by various adhesives or welding means. The ultra-high strength fiber reinforced concrete plate mounting bracket 18 and the adjusting plate 19 may be molded as a single piece. One fastener portion 20 </ b> A of the hook-and-loop fastener 20 is fixed to the surface of the adjustment plate 19. This fixing means is made of an adhesive such as a bond.
On the other hand, the fastener portion 20A may be directly fixed to the ultra high strength fiber reinforced concrete plate mounting bracket 18 with an adhesive or the like.

As shown in FIGS. 1 and 2, the one fastener portion 20A of the hook-and-loop fastener 20 includes, for example, a mushroom-like projection piece group as the projection piece 20a. The one fastener portion 20A includes a substrate 20b and the protruding piece 20a.

Thus, the ultra high strength fiber reinforced concrete plate mounting bracket 18, the adjustment plate 19, and the one fastener portion 20 </ b> A are a plurality of components that have been previously driven and embedded in the vicinity of the repaired portion of the concrete structure 16. Anchor bolts 22 are driven into the concrete anchor 21 and fixed to the plastic spacer 17 for unevenness adjustment.

Reference numeral 23 denotes an ultra-high strength fiber reinforced concrete plate, and the other upper surface forms, for example, a cylindrical projection group 23a as shown in FIG. 3, and the other fastener portion 20B is fixed to, for example, the right side, that is, one upper surface of the adjacent portion. . The other fastener portion 20B includes a substrate 20b and a protruding piece 20a, and includes, for example, a mushroom-like protruding group as the protruding piece 20a. The ultra-high-strength fiber reinforced concrete board 23 is an ultra-high-strength fiber reinforced concrete board 23 used when repairing a civil engineering structure such as a concrete structure, and the material thereof is an inorganic cement material or the like. Formed with.

The ultra-high-strength fiber reinforced concrete plate 23 has, for example, a substantially rectangular thin plate shape with a horizontal length (horizontal length) of about 2 (m), a vertical length of about 1 (m), and a thickness of about 25 (mm). And the surface has a through hole 23b for insertion through which a bolt head of a concrete anchor bolt is inserted with a predetermined interval. As shown in FIGS. 1 and 3, the ultra-high-strength fiber reinforced concrete plate 23 has a diameter of about 6 (mm) with a minute predetermined interval on the entire upper surface except the left or right edge, that is, the other upper surface. Are arranged and formed in series and innumerably. The left or right edge portion, that is, one upper surface is provided with a hook-and-loop fastener 20 formed of innumerable small protruding pieces 20a as shown in the figure, and has a unique shape. The width length of the other fastener portion 20B of the surface fastener 20 is the width length of the left or right edge portion of the ultra high strength fiber reinforced concrete plate 23 and has, for example, about 5 (cm). It is configured by adhering to the upper surface of the concrete plate 23 with an adhesive or the like.

Therefore, for example, when applied to a concrete open channel as a concrete structure, an ultra-high strength fiber reinforced concrete plate 23 is placed on the inner wall surface of the concrete open channel having a substantially U-shaped cross section from a concrete anchor bolt driving hole 23b. The anchor bolt 24 is driven and fixed.

Next, an assembling procedure, a construction method, and the like will be described with respect to an embodiment in an installation structure of an ultrahigh strength fiber reinforced concrete plate in a concrete structure according to the present invention.
First, a desired number of bolt driving holes (not shown) are drilled around the repair site of the concrete structure 16 and the concrete anchor 21 is driven and embedded from the surface of the concrete structure 16. And the plastic spacer 17 for unevenness adjustment is arrange | positioned on the surface of this concrete structure 16 so that the said repair site | part may be coat | covered.

Next, the group of projection pieces 20a of one fastener portion 20A of the surface fastener 20 fixed to the surface of the adjustment plate 19, the plastic spacer 17 for unevenness adjustment or the super high strength fiber reinforced concrete plate mounting bracket 18, or the projection pieces 20a. For example, an adhesive 20c such as a flexible adhesive is applied and filled into the mutual gap, for example, inside the group of mushroom-like projection pieces. Then, the ultra-high strength fiber reinforced concrete plate mounting bracket 18 provided with the adjusting plate 19 is brought into contact with and arranged on the unevenness adjusting plastic spacer 17. The adhesive 20c is composed of an epoxy resin-based, polybutadiene resin-based, acrylic resin-based, or silicon resin-based adhesive.
The unevenness adjusting plastic spacer 17 and the ultra high strength fiber reinforced concrete plate mounting bracket 18 may be omitted, and the adjustment plate 19 may be disposed directly on the surface of the concrete structure 16.

Further, the adhesive 20c is applied and filled into the group of projection pieces 20a or the gap between the projection pieces 20a at the same time as the one fastener portion 20A of the surface fastener 20 and the other fastener portion 20B. To do. Thus, when the other fastener portion 20B fixed to the upper surface of the ultra-high-strength fiber-reinforced concrete plate 23 is engaged with the one fastener portion 20A, one and the other fastener portions 20A and 20B of the surface fastener 20 and the substrates 20b and 20b are formed. The adhesive 20c is sealed in the space.

Then, anchor bolts 22 are driven into the plurality of concrete anchors 21, and the ultrahigh strength fiber reinforced concrete plate mounting bracket 18 including the plastic spacer 17 for unevenness adjustment and the one fastener portion 20 </ b> A is fixed to the surface of the concrete structure 16. At this time, the ultra high strength fiber reinforced concrete plates 23 and 23 are temporarily fixed to the concrete structure 16 or the adjusting plate 19 or the like. The ultra high strength fiber reinforced concrete plates 23, 23 are supported from the surface (upper surface) by, for example, a support pipe (not shown). This support pipe is a pipe for fixing the ultra-high strength fiber reinforced concrete plates 23 and 23 to a predetermined position in a part of the formwork. An injecting agent 25 composed of various resin systems or the like is injected into and filled in a gap or space between the concrete structure 16 and the ultra high strength fiber reinforced concrete plate 23. At this time, the injection agent 25 does not leak from the joint space between the ultra high strength fiber reinforced concrete plates 23. When the injection 25 is solidified, the support pipe is removed.

Further, as another construction method, after the other fastener portion 20B of the ultra high strength fiber reinforced concrete plate 23 is engaged and fixed with the one fastener portion 20A as shown in FIG. 2, the ultra high strength fiber reinforced concrete 23 has a concrete structure. The super high strength fiber reinforced concrete plate 23 is driven into a concrete anchor bolt driving hole 23b in which a concrete anchor bolt 24 has been drilled in advance. The fiber reinforced concrete plate 23 is fixed and arranged on the concrete structure 16. Finally, an injecting agent 25 composed of various resin systems or the like is injected and filled in the gap or space between the concrete structure 16 and the ultra high strength fiber reinforced concrete plate 23.

Moreover, according to the installation structure of the ultra high strength fiber reinforced concrete plate in the concrete structure according to the present invention described above, the concrete structure is caused by the stress reaction of the alkali aggregate constituting the concrete structure 16 as the frame. If 16 expands and an earthquake or the like is induced as external factor vibration, one of the ultra high strength fiber reinforced concrete plates 23 moves in the direction of arrow P1 as shown in FIG. Therefore, a joint space S3 is formed between the adjacent super high strength fiber reinforced concrete plates 23 and 23. If the joint space S3 is formed, a deterioration factor substance of the flexible adhesive such as ultraviolet rays, water (H ₂ O), carbon dioxide (CO ₂ ), and splashed salt is present in the joint space S3 as shown in FIG. Even if it flows in the direction of the arrow P2, the deterioration factor substance diffuses due to the adhesive 20c existing in the mutual gap in the group of projection pieces 20a formed on the one fastener portion 20A and the other fastener portion 20B of the surface fastener 20. The deterioration factor substance is shielded by the upper and lower substrates 20b and 20b of the one fastener part 20A and the other fastener part 20B and does not flow over the surface of the concrete structure 16, and the concrete structure 16 is completely repaired. The repair quality can be set high.
It is also possible to fill the joint space S3 with various resin agents.

The filler filled in the joint space S3 of the butt portion of the ultra high strength fiber reinforced concrete plate 23 by forming joints on the ultra high strength fiber reinforced concrete plate 23 covering the concrete structure (frame) 16 described above. Although the material deteriorates over time, the adhesive 20c applied in the hook-and-loop fastener 20 prevents deterioration-causing substances such as ultraviolet rays, water (H ₂ O), carbon dioxide (CO ₂ ), and splashed salt, thereby preventing the concrete structure (frame). It does not enter the surface or inside of the 16 Even if one of the ultra-high-strength fiber reinforced concrete plates 23 fluctuates due to an earthquake or the like, there is a possibility that it will explode only by adhesion with the adhesive 20c. For example, an independent mushroom-like projection piece group as the piece 20a can partially prevent the adhesive 20c from bursting. With this structure, a part of the deterioration factor substance stops at, for example, an independent mushroom-like projection group.

It is a vertical sectional view showing the installation structure of the ultra high strength fiber reinforced concrete plate in the concrete structure according to the present invention. It is an expanded sectional view which shows the internal structure of the hook_and_loop | surface fastener applied to the installation structure of the ultra high strength fiber reinforced concrete board in a concrete structure, and the other ultra high strength fiber reinforced concrete board. It is a top view which shows the shape of the upper surface of one ultra high strength fiber reinforced concrete board, and the surface shape of the other fastener part. FIG. 2 is an enlarged cross-sectional view showing a state where the butt joint space is generated when the other ultra-high-strength fiber reinforced concrete plate is moved from the state where the other ultra-high-strength fiber-reinforced concrete plate is abutted. is there. FIG. 4 is an enlarged partial cross-sectional view illustrating a state in which a deterioration factor substance of concrete flows from a butt joint space illustrated in FIG. 3. It is a vertical sectional view showing a first example in the prior art. It is an explanatory outline figure showing the 2nd example in conventional technology. It is a vertical sectional view showing a third example in the prior art.

Explanation of symbols

16 Concrete structure (frame)
17 Plastic spacer for unevenness adjustment 18 Super high strength fiber reinforced concrete plate mounting bracket 19 Adjustment plate 20 Surface fastener 20A One fastener portion 20B of surface fastener Other fastener portion 20a of surface fastener 20a Protruding piece 20b Substrate 20c Adhesive 21 Concrete anchor 22 Anchor Bolt 23 Ultra high strength fiber reinforced concrete plate 23a Cylindrical projection group 23b Concrete anchor bolt driving hole 24 Concrete anchor bolt 25 Injection agent

Claims (4)

Ultra high strength fiber reinforcement in a structure consisting of a concrete structure (frame) and a plurality of anchor bolts that fix and place ultra high strength fiber reinforced concrete plate mounting brackets on the surface of the concrete structure (frame) It consists of one fastener part fixed to the surface of the concrete plate mounting bracket and the other fastener part fixed to one upper surface of the super high strength fiber reinforced concrete plate that meshes with the one fastener portion and has a cylindrical projection group formed on the other upper surface. and the surface fastener, whereas concrete characterized by comprising zipper portion and the other fastener portion is allowed and the concrete structure interposing an adhesive between said the infusate to be filled between the ultra high strength fiber reinforced concrete board Installation structure of ultra high strength fiber reinforced concrete board in the structure. Ultra high strength fiber reinforcement in a structure consisting of a concrete structure (frame) and a plurality of anchor bolts that fix and place ultra high strength fiber reinforced concrete plate mounting brackets on the surface of the concrete structure (frame) It consists of one fastener part fixed to the surface of the concrete plate mounting bracket and the other fastener part fixed to one upper surface of the super high strength fiber reinforced concrete plate that meshes with the one fastener portion and has a cylindrical projection group formed on the other upper surface. A surface fastener, an injecting agent interposed between one fastener portion and the other fastener portion and filled between the concrete structure and the ultra high strength fiber reinforced concrete plate, and the ultra high strength fiber reinforced concrete It consists of a plurality of concrete anchor bolts that drive and fix the plate to the surface of the concrete structure. Installation structure of at ultra high strength fiber reinforced concrete plate that concrete structures. The one and other fastener portions of the surface fastener are constituted by a substrate and a protruding piece group integrally formed on the substrate, and when temporarily fixed, the protruding piece group of the other fastener portion is engaged and fixed. The installation structure of the ultra-high-strength fiber reinforced concrete board in the concrete structure according to claim 1 or 2. The installation structure of the ultra-high-strength fiber reinforced concrete plate in a concrete structure according to claim 1 or 2, wherein the projection piece of the other fastener portion in the surface fastener is a mushroom-like projection piece.

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