JP3852082B2 - Building reinforcing tape and method of reinforcing a building using the same - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a reinforcing tape, and more particularly, to a reinforcing tape that is easy to cut and is suitable for reinforcing concrete structures, for example.
[0002]
[Prior art]
Many buildings, buildings, roads and railway viaducts were destroyed by the 1995 Hyogoken-Nanbu Earthquake, and the earthquake resistance of civil engineering buildings including concrete structures was reviewed. It was. In particular, the government is obligated to implement seismic reinforcement for civil structures with strong publicity.
[0003]
There are already many civil engineering buildings made of concrete, but generally those built before 1975 have insufficient seismic resistance and require seismic reinforcement. Moreover, even if the earthquake resistance is sufficient, there are many concretes that are cracked or partially peeled off due to drying shrinkage of the concrete or external pressure, and it is necessary to repair these.
[0004]
It reinforced concrete, although repair method are several, a tape made of a fiber sheet stuck to the concrete surface, or wound reinforcing, repairing method has attracted attention. This is because the construction is easy and the construction period can be shortened.
[0005]
This fiber sheet reinforcing and repairing method uses a fiber sheet having high tensile strength and high tensile elastic modulus (usually carbon fiber is generally used) and is bonded to the concrete surface using an epoxy resin. Is done. In this case, the epoxy resin not only adheres the fiber sheet to the concrete, but also impregnates the fiber sheet, improves the strength of the sheet, and further serves as a medium to convey the strength of the fiber sheet to the concrete, an important material It is.
[0006]
As described above, as a method for reinforcing and repairing concrete, a method of attaching a composite of a fiber sheet and an epoxy resin is adopted, and it is rapidly spreading at present.
[0007]
[Problems to be solved by the invention]
As a procedure for affixing the fiber sheet to the concrete surface, first, the concrete surface is properly suspended, the fragile layer of the surface is removed by polishing, etc. Fill up with putty etc. to adjust the unevenness. After such a surface treatment, a resin called a primer is applied to the concrete surface and dried. The primer is usually the same type as the resin impregnated into the fiber sheet. Therefore, when using an epoxy resin as an impregnating resin, an epoxy resin whose viscosity is adjusted so as to easily penetrate into concrete is used as a primer. After a primer is applied to the concrete surface and sufficiently dried, an epoxy resin as an impregnating resin is applied thereon.
[0008]
After the application, an aramid fiber sheet cut in advance to a required length (a length obtained by adding a margin to the circumference of the column) is immediately attached, and the fiber sheet is sufficiently impregnated with a resin using a roller or the like. After confirming that the undercoat resin is sufficiently impregnated, the same resin is used for overcoating. After the epoxy resin is uniformly applied to the entire surface of the fiber sheet, it is cured until the resin is completely cured. Depending on the degree of reinforcement, multiple layers of fiber sheets may be laminated and pasted, and in this case, the above steps are repeated. Once the top layer sheet has been pasted and the epoxy resin on the surface has been completely cured, the surface is coated with fluororesin or acrylic resin to improve durability and fire resistance. Paint.
[0009]
Although the above procedure is performed, the size of the viaduct pillar is a prism with a side of 70 cm and a height of about 5 m, and the fiber sheet has a width of about 50 cm. Ten are required. In addition, since Shinkansen pillars require an average of 8 layers, approximately 80 sheets are required per viaduct pillar. Accordingly, approximately 80 times of measuring and cutting operations are required. The measurement work at the construction site is limited in work place and work time, so there have been problems such as dimensional differences and delays in the construction period. This is because it takes time to measure and cut a sheet having a length of 3 m.
[0010]
Accordingly, an object of the present invention is to provide a reinforcing sheet that is easy to measure at a construction site or the like and has excellent work efficiency.
[0011]
[Means for Solving the Problems]
In order to solve the above problems, the present invention employs the following means.
(1) For the purpose of long reinforcement for use to reinforce by reinforcing the surrounding part of the reinforcing part of the building by applying the peripheral covering or surface sticking to the reinforcing part by cutting the length of the surrounding part of the reinforcing part of the building or applying the surface A tape for reinforcing a building , wherein aramid fibers are used for warp yarns, and the yarns are made of weft yarns of different colors as weft yarns at regular intervals in the longitudinal direction. tape.
[0012]
(2) the building of the reinforcing object is characterized in that it is a concrete building (1) Symbol placement buildings reinforcing tape.
(3) After cutting the length of the long reinforcing tape that is sufficient to cover the surface of the building reinforcement or to apply the surface, the reinforcing tape is attached and fixed to the periphery or surface of the building reinforcement with an adhesive. In the building reinforcement method to be performed, the building reinforcement tape according to claim 1 is used as the reinforcement tape.
[0013]
DETAILED DESCRIPTION OF THE INVENTION
Building reinforcing tape of the present invention is Ru consists fabric. Fiber material constituting the this fabric is usually used as tensile strength of 100 kg / mm ² or more, such as aramid fibers, polyarylate fibers, polybenzobisoxazole fibers, ultrahigh molecular weight polyethylene fibers, high strength polyvinyl alcohol Organic fibers such as fibers, inorganic fibers such as carbon fibers, glass fibers, and ceramic fibers, or metal fibers are used alone or in combination , but aramid fibers may be used for warp yarns (yarns in the longitudinal direction of the sheet). is necessary.
[0014]
Fabric was used such that aramid fibers at least a portion, i.e., Ru using aramid fibers in the warp yarn (longitudinal direction of the yarn sheet).
[0015]
Further, the mark of the reinforcing tape, achieved by implanting one or several of the color yarn for each length of a certain tape as weft.
[0016]
In this way, the tape for reinforcement and repair marked at a certain length can be determined by the mark when cutting to the required length, and it is necessary to measure with a tape measure or other scale. Absent. Especially in places where it is difficult to secure a large space for measurement, such as a construction site, it is not necessary to measure with a scale, so that cutting work can be carried out easily and efficiently.
[0017]
【Example】
Hereinafter, the present invention will be specifically described with reference to examples.
Reference Example warp tensile strength 290 kg / mm ^2, the high modulus para-aramid fiber tensile modulus 11,100kg / mm ² (trade name "Kevlar") 2840D, using nylon fibers 210D in weft yarn, width 50cm A tape-shaped woven fabric was woven. The total number of warp yarns was 690, the density of the weft yarns was 60 per 10 cm, and the woven fabric was imitation weave.
This tape-shaped woven fabric had a tensile strength of 67 ton / m after being impregnated with an epoxy resin and cured, and was suitable as a reinforcing tape fabric for reinforcing concrete pillars that support railway viaducts.
[0018]
This tape-shaped woven fabric was passed through a marker equipped with a length measuring device and a stamp, and red marking was made every 1 m in length.
When using this marked tape-shaped fabric to reinforce a railway viaduct column, which is a prism with a side of 70 cm and a height of 5 m, the length of the tape-shaped fabric is used without using a scale. It was possible to cut into 80 pieces of 3 m reinforcing tape, and to work efficiently.
[0019]
Example 1
Same as the reference example , except that three horizontal yarns pre-dyed in blue every 10 cm and three red yarns pre-dyed in red every 1 m are used to determine the cutting length. A tape-shaped fabric was made.
[0020]
This tape-shaped woven fabric did not need to be marked with a stamp and could be cut accurately.
[0021]
Example 2
Weaving 1m with undyed weft yarn, the next 1m weaving as red yarn-dyed colored yarn weft yarn, and weaving them in different colors every 1m, using the same yarn and the same structure as the reference example Then, a tape-shaped woven fabric having a width of 50 cm was woven. Since the tape-shaped woven fabric is color-coded every 1 m, it can be easily cut to the required length without using a scale.
[0022]
【The invention's effect】
Reinforcing tape composed of a fabric different shades of color yarn woven as the weft yarn for each fixed length, when cut into required lengths, can determine any length by marks colored threads No need to measure with tape measure or other scales. Especially in places where it is difficult to secure a large space for measurement, such as a construction site, it is not necessary to measure with a scale, so that cutting work can be carried out easily and efficiently.

Claims (3)

Cutting the peripheral coating or surface pasted Shoyo length of the building reinforced portion from the reinforcement tape long, met applications reinforcing tapes elongated for reinforcing by only around covering or surface attached to the reinforcing portion A structure reinforcing tape comprising a woven fabric in which aramid fibers are used for warp yarns, and colored yarns of different colors are woven as weft yarns at regular intervals in the longitudinal direction. Building reinforcing tape according to claim 1, wherein the building of the reinforcing object is characterized in that it is a concrete building. A structure in which a length sufficient to cover or surround a building reinforcement portion is cut from a long reinforcing tape, and then the reinforcement tape is attached and fixed to the periphery or surface of the building reinforcement portion with an adhesive. In the reinforcing method, the building reinforcing tape according to claim 1 is used as the reinforcing tape.