JPH09268776A - Reinforcing/repairing method for building using multilayered fiber sheet - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent incomplete sticking such as existence of bubbles from being formed while improving workability in executing works for reinforcing or repairing a building, using fiber sheets. SOLUTION: After ground processing for grinding the surface B1 of a building B is executed, a primer 4 is applied to the surface whereon the ground processing is executed, and hardening is made afterward. In a sheet sticking process, a multilayered sheet A made up by pressing and layering sheetlike fibers through impregnating agent is stuck to the surface of the hardened primer 4 with uneveness adjustment agent 5 interposed in between. In a finishing process, finishing agent 9, 10 is applied to the surface of the multilayered fiber sheet A stuck to the surface B1 of the building B.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for reinforcing or repairing a building using a multilayer fiber sheet.

[0002]

2. Description of the Related Art When a structure such as a tunnel, a bridge or a building is deteriorated or aged, it is necessary to reinforce or repair the structure. A series of methods have been used in the past.

(1) Substrate treatment step The surface of the building is polished to remove stains on the surface.

(2) Primer treatment step A primer is applied to the surface which has been subjected to the base treatment and cured.

(3) Unevenness adjusting step The unevenness adjusting agent is applied to the surface of the hardened primer and hardened to smooth the surface.

(4) Fibrous sheet pasting process: An impregnating agent is applied to the surface of the hardened conditioner, and further,
Before the impregnating agent is cured, a fiber sheet made of carbon fiber, glass fiber, aramid fiber or the like is attached.

This process is repeated until the number of sheets required for strength is increased, and the fiber sheets are laminated.

(5) Finishing Step A finishing agent is applied to the surface of the fiber sheet attached to the building.

[0009]

In terms of workability, the conventional reinforcement / repair method for a building described above has the following problems in the unevenness adjusting step and the fiber sheet attaching step.

(1) The smoothing of the surface by applying the uncontrollable agent requires a high level of skill for the operator.

(2) The attachment of the fiber sheet needs to be performed before the impregnating agent is hardened, which requires a quick operation and requires skill of the operator.

(3) Since unbonded portions due to air bubbles or the like are easily formed between the fiber sheets when the fiber sheets are laminated due to vibrations of the building, defoaming work is required and strength is also a problem. was there.

(4) Since a resin is used, the adhesive strength varies depending on the weather conditions such as temperature and humidity, and quality control is difficult.

(5) When constructing on the back surface of the bridge girder or floor board or on the inner wall surface of the tunnel, the operator must work upward for a long time, and the accuracy may be deteriorated due to the fatigue of the operator.

[0015]

In order to solve the above problems, the present invention provides a primer treatment step for polishing the surface of a building, and a primer for applying a primer to the primer-treated surface and further curing the primer. The treatment step, the step of applying a multi-layer fiber sheet in which sheet-like fibers are pressure-laminated on the surface of the cured primer via an impregnating agent, and the step of attaching a non-landing agent on the surface of the building. A finishing step of applying a finishing agent to the surface of the attached multilayer fiber sheet.

Particularly, the defoaming work is facilitated by providing the multi-layer fiber sheet with a defoaming through hole for discharging air bubbles formed between the primer surface and the multi-layer fiber sheet surface in the sheet attaching step to the outside. I have to.

[0017]

BEST MODE FOR CARRYING OUT THE INVENTION A method for reinforcing and repairing a building using a multilayer fiber sheet according to the present invention is a method used when reinforcing or repairing an aged tunnel or the like, and includes the following steps. Is.

(1) A base treatment step for polishing the surface of a building such as a tunnel (2) A primer treatment step for applying a primer to the surface subjected to the base treatment and further curing (3) a surface of the cured primer, Multi-layer fiber sheet in which sheet-shaped fibers are pressure-laminated with an impregnating agent, is pasted with a non-landing agent. Sheet sticking process (4) Finish on the surface of the multi-layer fiber sheet pasted on the surface of the building Finishing process of applying the agent Therefore, the construction accuracy is improved by greatly simplifying the conventionally performed unevenness adjustment process and fiber sheet pasting process.

Therefore, in the step of adjusting the unevenness and the step of attaching the fiber sheet, it is possible to reinforce or repair the building without requiring the high technical skill and skill of the worker, which has been conventionally required. Is.

Further, since the multilayer fiber sheet is manufactured by pressure-laminating sheet-like fibers through an impregnating agent in advance, unbonded portions such as bubbles due to vibration of a building may be formed inside the multilayer fiber sheet. It is possible to produce a multilayer fiber sheet excellent in strength without generating.

Moreover, a multilayer fiber sheet of stable quality can be manufactured without being affected by weather conditions such as temperature and humidity.

In particular, the multi-layer fiber sheet is provided with defoaming through holes for discharging air bubbles formed between the surface of the primer and the surface of the multi-layer fiber sheet in the sheet attaching step to the outside.

Therefore, even when air bubbles are formed between the surface of the primer and the surface of the multi-layer fiber sheet when the multi-layer fiber sheet is attached, the air bubbles can be easily transferred to the outside by pressing them with a support or pressure band. It is designed so that it can be discharged.

Therefore, it is possible to simplify the defoaming work, which conventionally required skill, and improve the accuracy, and at the same time, shorten the working time.

Further, since the unsteadiness adjusting agent can be visually confirmed through the defoaming through hole, it is possible to confirm the state of pressurization by the support work or the pressure band and the hardening state of the undesirability adjusting agent. It is a thing.

[0026]

Embodiments of the present invention will be described in detail below with reference to the accompanying drawings. In addition, in the present embodiment, a case where a laminated sheet-shaped carbon fiber sheet is used as the multilayer fiber sheet will be described, but a glass fiber,
A multilayer fiber sheet made of aramid fiber or the like can also be used.

FIG. 1 shows a tunnel T in which the inner wall surface T1 is reinforced by the method of reinforcing and repairing a building using the multilayer fiber sheet A according to the present invention. The multi-layer fiber sheet A is attached to improve the load bearing capacity of the inner wall of the tunnel.

Next, using the multilayer fiber sheet A, the building B is constructed.
A method of reinforcing or repairing the above will be described for each step (see FIG. 2). The structure of the multilayer fiber sheet A will be described later.

(1) Substrate treatment process The surface B1 of the building B is polished by a disc sander or the like,
Remove dirt on B1.

Particularly when the surface B1 is concrete, the deteriorated portion of the surface B1 is removed.

(2) Primer treatment step A primer 4 made of epoxy resin (for example, FP-NS manufactured by Tonen Co., Ltd.) is coated on the surface B1 subjected to the base treatment with a roller brush, and then left for several hours to leave the primer 4 in place. Let it harden.

By applying the primer 4, it is possible to increase the adhesive strength of the unsteadiness adjusting agent 5 and, as a secondary effect, increase the strength of the surface B1 of the building B.

(3) Sheet pasting process: The surface of the cured primer 4 is coated with a non-sticking agent 5 made of epoxy resin (for example, L-2200 manufactured by Towa Sangyo Co., Ltd.) with putty, and the non-sticking agent 5 is hardened. Before doing the multi-layer fiber sheet A
Paste. As will be described later, since the multilayer fiber sheet A has semi-rigidity, unlike the conventional case, the multilayer fiber sheet A can be attached before the unsteadiness adjusting agent 5 is cured.

Since the multilayer fiber sheet A has semi-rigidity, the unsteadiness adjusting agent 5 is directly applied to the multilayer fiber sheet A itself, and then the multilayer fiber sheet A is attached to the surface of the cured primer 4. You can also attach it.

Then, as shown in FIG. 3, a support structure 6 is incorporated between the surface B1 of the building B and the ground G, and the multi-layer fiber sheet A is pressed against the surface B1 while the unsteadiness adjusting agent 5 is added. Is cured, and the multilayer fiber sheet A is fixed to the surface B1.

When the multi-layer fiber sheet A is attached to the peripheral surface C1 or the like of the pier C, as shown in FIG. 4, the multi-layer fiber sheet A is attached to the peripheral surface C1 via the unsteadiness adjusting agent 5, and The periphery of the multi-layer fiber sheet A is fastened by the pressure band 7, and the multi-layer fiber sheet A is fixed to the peripheral surface C1.

In this step, since the unsteadiness adjusting agent 5 is mainly used as an adhesive for sticking the multilayer fiber sheet A on the surface of the cured primer 4, unlike the prior art,
Without the need for advanced technology to smooth the surface,
The work of this step can be performed.

(4) Finishing Process A finishing agent 9 made of an epoxy resin is applied to the surface of the fiber sheet A attached to the surface B1 of the building B, and a finishing agent 10 made of a urethane resin is further applied. , Shall have excellent weather resistance.

Next, the multilayer fiber sheet A will be described in detail.

As shown in FIG. 5, the multilayer fiber sheet A is
A carbon fiber sheet 2 (for example, FTS-C1-20 manufactured by Tonen) is pressure-laminated through an impregnating agent 3 (for example FR-E3P manufactured by Tonen).

That is, on the surface of the carbon fiber sheet 2 in which the reinforcing fibers 1 composed of a plurality of carbon fibers are arranged in one direction,
While applying the impregnating agent 3 made of epoxy resin,
Similarly, the back surface is coated with the impregnating agent 3 made of an epoxy resin so that the entire surface of the carbon fiber sheet 2 is impregnated with the impregnating agent 3. Before the impregnating agent 3 is cured, another carbon fiber sheet 2 is formed.
Are laminated under pressure, and the carbon fiber sheet 2 is
The impregnating agent 3 is applied so that the impregnating agent 3 permeates the entire surface of the.

By laminating the required number of carbon fiber sheets 2 in terms of strength, the multilayer fiber sheet A is formed into a plate shape having a size that is easy to handle and has rigidity, as shown in FIG. ing.

When the carbon fiber sheet 2 is laminated, the impregnating agent 3 is applied so as to permeate the entire surface of the carbon fiber sheet 2, and the surface of the carbon fiber sheet 2 is laminated while being pressed, whereby the inside of the multilayer fiber sheet 1 is laminated. The non-bonded part such as air bubbles is not generated.

Therefore, the multi-layer fiber sheet A having excellent strength and stable quality can be manufactured.

In order to take advantage of the high tensile strength of the carbon fiber sheet 2, the carbon fiber sheet 2 is laminated so that the carbon fiber sheets 2 are orthogonal to each other as shown in FIG.

Therefore, the tensile strength of the multilayer fiber sheet A in both directions can be increased.

For a structure having an angle or a curved surface, the carbon fiber sheet 2 is laminated on a temporary table according to the construction shape, so that the multilayer fiber sheet A having a shape suitable for the surface B1 of the building B in advance. Can also be manufactured.

Further, as shown in FIGS. 7 and 8, equipment for manufacturing the multilayer fiber sheet A by pressure lamination and a multilayer fiber sheet A having a size suitable for transporting the multilayer fiber sheet A are provided. By connecting a plurality of sheets, the multi-layer fiber sheet A can be attached even when the surface B1 of the building B is vast or angled.

In that case, as shown in FIG. 9, when the impregnating agent 3 is not applied to the end A1 of the multilayer fiber sheet A, the multilayer fiber sheet A is attached to the surface B1 of the building B. Then, as shown in FIG. 8, the carbon fiber sheets 2 are alternately stacked and adhered to each other to connect the plurality of multilayer fiber sheets A.

Further, as shown in FIG. 6, the multilayer fiber sheet A is formed with a plurality of defoaming through holes 8.

When the multilayer fiber sheet A is attached, even if bubbles are formed between the surface of the primer 4 and the surface of the multilayer fiber sheet A, it can be easily pressed by the supporting members 6 and the pressure bands 7. The bubbles are exhausted to the outside.

Therefore, it is possible to simplify the defoaming work which has conventionally required skill, and to shorten the working time.

Further, since the unsteadiness adjusting agent 5 can be visually confirmed through the defoaming through hole 8, the state of pressurization by the support 6 and the pressure band 7 can be confirmed, and the hardening state of the unevenness adjusting agent 5 can be confirmed. can do.

[0054]

The present invention is embodied in the form described above and has the following effects.

(1) In the present invention according to claim 1, a surface treatment step of polishing a surface of a building, a primer treatment step of applying a primer to the surface subjected to the surface treatment and further curing, and a cured primer A sheet attaching step of attaching a multilayer fiber sheet obtained by pressure-laminating sheet-like fibers through an impregnating agent on the surface of the sheet, and a multilayer fiber sheet attached on the surface of the building. Since it consists of a finishing process of applying a finishing agent to the surface, the unsteadiness adjusting agent is mainly used as an adhesive agent for pasting the multilayer fiber sheet on the surface of the cured primer in the sheet pasting process, and smoothes the surface. The building can be reinforced and repaired without the need for advanced technical capabilities.

Further, the time required for the upward work can be shortened when constructing the back surface of the pier or the inner wall surface of the tunnel, and the workability at the time of the reinforcement / repair work of the building can be improved.

Further, since the multilayer fiber sheet is manufactured by pressure-laminating sheet-shaped fibers with an impregnating agent in advance, unbonded portions such as bubbles due to vibration of the building may be formed inside the multilayer fiber sheet. It is possible to produce a multi-layer fiber sheet having excellent strength without generating.

Moreover, a multilayer fiber sheet of stable quality can be manufactured without being affected by weather conditions such as temperature and humidity.

Further, it is possible to manufacture the multi-layer fiber sheet in a size suitable for equipment for production by pressure lamination, transportation of the multi-layer fiber sheet, and the like.

Further, for a structure having an angle or a curved surface, by laminating sheet-shaped fibers on a temporary table according to the construction shape, a multilayer fiber sheet having a shape suitable for the surface shape of the building is manufactured in advance. can do.

(2) In the present invention according to claim 2, in the multilayer fiber sheet, a defoaming penetration for discharging bubbles formed between the surface of the primer and the surface of the multilayer fiber sheet in the sheet attaching step to the outside. Since the holes are provided, even when bubbles are formed between the surface of the primer and the surface of the multilayer fiber sheet when the multilayer fiber sheet is attached, the bubbles can be easily removed by pressing them with a support or a pressure band. It can be discharged to the outside, the defoaming work that has conventionally required skill can be simplified, and the work time for reinforcement / repair work of buildings can be shortened.

Further, since the unsteadiness adjusting agent can be visually confirmed through the defoaming through hole, it is possible to confirm the state of pressurization by the support work and the pressure band, etc., at the time of the reinforcement / repair work of the building, and at the same time, the unsteadiness adjusting agent. It is possible to confirm the curing state of.

[Brief description of drawings]

FIG. 1 is a perspective view showing a tunnel whose inner wall surface is reinforced by a method of reinforcing and repairing a building using a multilayer fiber sheet according to the present invention.

FIG. 2 is a cross-sectional view showing the surface of a building embodying the present invention.

FIG. 3 is a cross-sectional view showing a sheet attaching step.

FIG. 4 is a sectional view of the same.

FIG. 5 is a cross-sectional view showing a multilayer fiber sheet.

FIG. 6 is a plan view of the same.

FIG. 7 is a plan view showing a state in which a plurality of multilayer fiber sheets are connected.

FIG. 8 is a sectional view of the same.

FIG. 9 is a cross-sectional view showing an end portion of a multilayer fiber sheet.

[Explanation of symbols] A Multi-layer fiber sheet B Construction 1 Reinforcing fiber 2 Carbon fiber sheet 3 Impregnating agent 4 Primer 5 Unevenness adjusting agent 9,10 Finishing agent

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁶ Identification code Office reference number FI technical display location // B29K 105: 08

Claims (2)

[Claims] 1. A surface treatment process for polishing a surface (B1) of a building (B); a primer treatment process for applying a primer (4) to the surface subjected to the surface treatment and further curing; and a cured primer ( On the surface of 4), a multi-layer fiber sheet (A) in which sheet-shaped fibers are pressure-laminated via an impregnating agent (3),
Sheet attachment process that attaches through the uncontrollable agent (5), and multilayer fiber sheet attached to the surface (B1) of the building (B)
A method for reinforcing and repairing a building using a multilayer fiber sheet, which comprises a finishing step of applying finishes (9) and (10) to the surface of (A). 2. The multilayer fiber sheet (A), the surface of the primer (4) and the multilayer fiber sheet in the step of applying the sheet.
(A) A through-hole (8) for defoaming, which discharges air bubbles formed between the surface and the outside, is provided to reinforce the building using the multilayer fiber sheet according to claim 1. Repair method.