JPS61196071A - Repairing of concrete structure - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION A1.Objective of the invention A. Field of industrial application The present invention seeks to provide a method for repairing the frame of a concrete structure having a novel configuration.

Conventional technology and its problems Conventionally, in order to repair cracks and water leaks in concrete structures, epoxy resin, water-added reaction board urethane resin, etc. were injected through drilled injection ports, but it was difficult to repair cracks and water leaks in concrete structures. In many cases, the desired injection effect could not be obtained. This is because the contact area with the injection site is extremely limited due to relying solely on drilling, and in extreme cases, injection has been done through an injection port that does not reach the designated site.

B1 Structure of the Invention A0 Means for Solving the Problem The present application attempts to solve the above-mentioned problem with the following structure.

That is, in the present application, a glass fiber layer is embedded in the frame of a concrete structure, and later a chemical solution such as a synthetic resin is injected into that layer to create a layer reinforced by glass fiber. This is a construction method that uses voids to improve the injection effect on cracks, joints, etc.

Example of invention The construction method of the present invention is as follows.

1st step - The crack 2 which is the repaired part in the frame 1 of the concrete structure is confirmed, and the width and depth of the crack 2 are investigated.

2nd process ~ Cut to a width of about 40 dragons around crack 2,
Open a U-shaped groove 3.

Sixth step - A glass fiber layer (glass mat) 4 corresponding to the width of the groove 6 is laid at the bottom of the groove 6 so as to cover the crack 2.

4th step ~ Rapid setting cement 5 on the top surface of the glass fiber layer 4
and embed the glass fiber layer 4. in this case,
If you want to secure the injection lower in advance for injecting the chemical solution 8 in the next step, after planting the injection nozzle 7A on the glass fiber layer before filling the quick setting cement 5,
It is preferable to fill it with quick setting cement 5.

Fifth step ~ By injecting and impregnating the glass fiber layer with the injection lower formed by the injection pipe 7A or the injection lower formed by drilling a hole after filling with the quick setting cement 5, The crack also allows the chemical solution 8 to permeate through the opening 2A in contact with the glass fiber layer.

Sixth step - Seal the injection lower with quick setting cement 6 or cotton.

Seventh step - Apply waterproofing material 9 to the repaired surface as necessary.

Among these, Lion Shisui (trademark - Osaka Cement) was used as the quick-set cement in each of the above-mentioned steps, and hydroreactive urethane (TACS S - trademark - Japan TAC8S Association) was used as the chemical solution.

C1 action I will explain it along with the effects.

The effect of the C0 invention is that the injection is performed from the entire length of the crack through the glass fiber layer, making the injection reliable.

B. The voids secured by the glass fiber layer can make it possible to lower the injection pressure.

C. A reaction cured product of the injected chemical solution reinforced by the glass fiber layer is formed on the extension of the crack, giving the effect of embedding a water supply board.

By making use of the expandability of urethane, which is a hydrolyzed reactor, by simply filling the embedded glass fiber layer with a chemical solution, microscopic voids can be filled and sealed by themselves.

E. In waterworks construction, when sealing water leaks with quick-setting cement, the voids secured by the glass fiber layer become water channels, lowering the water leakage pressure, making it easy and reliable to embed the stone pillars and seal them. Make it.

Regarding the injection of hydration reaction type urethane.

The water necessary for the reaction can be secured in the voids of the glass fiber layer, ensuring the hydration reaction.

[Brief explanation of drawings]

Figure 1 is a perspective view explaining the first step, Figure 2 is a perspective view explaining the second process, Figure 6 is a perspective view explaining the sixth process, and Figure 4 is a perspective view explaining the fourth process. FIG. 5 is a perspective view of another embodiment in the fourth step; FIG. 6 is a vertical cross-sectional view of the same as above;
FIG. 7 is a longitudinal sectional view of the fourth grain, and FIG. 8 is a longitudinal sectional view illustrating the fifth to eighth steps. 106. Body, 200. crack, 5. ,,Groove,4. , , glass fiber layer, 510. Rapid setting cement, 700. inlet,
801. Chemical liquid ◎ Patent Applicant Road Maintenance Co., Ltd. ÷ Q, ”:, ', -5 ・iTi'L Figure 1 Figure 2

Claims (1)

[Claims] A groove with a predetermined width and depth is created around the crack at the crack that is desired to be repaired in the frame of a concrete structure, and then a glass fiber layer is laid in the groove to cover the crack. The method is characterized in that the top surface of the glass fiber layer is filled with quick setting cement to embed the glass fiber layer, and then a chemical solution such as hydrolytic urethane and epoxy resin is injected into the glass fiber layer. A method of repairing the framework of concrete structures.