JP7471167B2 - Repair method for vertical surfaces of concrete structures - Google Patents

Description

The present invention relates to a method for repairing the vertical surfaces of concrete structures that have deteriorated due to corrosion, salt damage, etc.

To repair the surface of a concrete structure that has deteriorated due to corrosion or salt damage, the deteriorated surface layer is removed, and then a reinforcing layer is formed by applying a repair material made of mortar or synthetic resin to replenish the lost strength.

A known conventional repair method for this type of construction is to scrape the surface of the existing concrete, clean the surface to remove the deteriorated layer, apply epoxy resin or the like on top of that, attach a carbon fiber sheet, and press the carbon fiber sheet with a roller or the like to impregnate the epoxy resin so that it appears on the surface of the carbon fiber sheet (see, for example, Patent Document 1).

In addition, in this type of repair method, after removing the deteriorated layer, the unevenness that occurs on the exposed healthy surface is filled by applying a repair material to form a flat base surface, and then a reinforcing layer is formed by applying more repair material on top of the base surface (see, for example, Non-Patent Document 1). With this method, the amount of thinning of the concrete structure is calculated by subtracting the thickness of the concrete structure at the time of forming the base surface from the original thickness of the concrete structure, and the amount of reduction in the strength of the concrete structure is calculated from this amount of thinning. The thickness of the reinforcing layer that can restore the reduced strength can also be calculated and designed, so that the strength of the repaired concrete structure can be reliably restored.

JP 2005-48399 A

FY2015 Construction Technology Review and Certification Project (Sewerage Technology) Technology Summary Composite Manhole Rehabilitation Method - Coating Type Eco-Guard Method Hybrid (FY2015 Construction Technology Review and Certification Project Implementing Organization Japan Sewerage Technology Organization)

When repairing the vertical surfaces of concrete structures, repair materials are applied using trowels and spatulas to form the base surface and the reinforcing layer, but it is difficult to form a surface that is aligned vertically from top to bottom, and depending on the skill level of the worker, vertical deviations can occur in the surface, causing distortion of the base surface or the reinforcing layer.

In addition, unevenness on the sound surface may cause unevenness to appear on the surface of the base layer or reinforcing layer.

When such surface distortions or unevenness occur, the aesthetic appeal of the concrete structure is compromised.

In addition, there are problems such as the fact that the amount of thinning of a concrete structure cannot be measured accurately due to distortion of the base surface, and that distortion of the reinforcing layer may result in the thickness of the reinforcing layer being less than the designed amount.

The object of the present invention is to provide a method for repairing the vertical surfaces of a concrete structure that can easily form the surface of the base surface and reinforcing layer formed on the vertical surfaces of the concrete structure into flat vertical surfaces, regardless of the skill level of the worker.

In order to achieve the above object, the invention described in claim 1 is a concrete structure repair method for repairing the vertical surface of a concrete structure, which includes a base surface formation process in which a deteriorated layer on the surface of the vertical surface of the concrete structure is removed to expose a healthy surface, and a resin-based or mortar-based repair material is applied to the healthy surface to fill in the irregularities of the healthy surface to form a flat base surface, and a reinforcing layer formation process in which a repair material is applied to the base surface formed by the base surface formation process to form a reinforcing layer having a thickness that allows the strength of the concrete structure to be restored, and in the base surface formation process, A first block made of a plastic material is attached to the surface at intervals, a straight rod having a perfect circular arc surface on its outer periphery is held in a vertical axial direction, and the circular arc surface is brought into contact with the first block, pressed in, and rolled to crush the first block and form a crushed surface in the first block, forming a first leveling body with the crushed surface as a base surface formation reference surface that indicates the position of the surface of the base surface, and the repair material is applied to the healthy surface along the base surface formation reference surface of the first leveling body to form a flat base surface.

The invention described in claim 2 is characterized in that in the base surface forming process described in claim 1, the first blocks are attached to the healthy surface by arranging the first blocks vertically to form a row of first blocks, and attaching the rows of first blocks in a horizontal direction with multiple spaces between them.

The invention described in claim 3 is characterized in that the first mass described in claim 1 or 2 is made from the same material as the repair material that is applied to the healthy surface to form the base surface.

The invention described in claim 4 is characterized in that, in the reinforcing layer forming step described in any one of claims 1 to 3, a plurality of second blocks made of a plastic material are attached to the base surface at intervals, a straight rod having a perfect arc-shaped arc surface on its outer periphery is held in a state in which the axial direction is vertical, a gauge member designed to a thickness equivalent to the thickness of the reinforcing layer is placed between the arc surface and the base surface, the arc surface is brought into contact with the second block, the gauge member is pressed until it is sandwiched between the base surface and the arc surface, and rolled to crush the second block and form a crushed surface in the second block, thereby forming a second leveling body with the crushed surface as a reinforcing layer formation reference surface that indicates the position of the surface of the reinforcing layer, and the repair material is applied to the base surface along the reinforcing layer formation reference surface of the second leveling body to form a reinforcing layer with a flat surface.

The invention described in claim 5 is characterized in that the second leveling body described in claim 4 is formed using a straight rod body in which the gauge member is attached to the arcuate surface.

The invention described in claim 6 is the reinforcing layer forming step according to claim 4 or 5,
The second blocks are attached to the base surface in such a manner that the second blocks are arranged vertically to form a row of second blocks, and the rows of second blocks are attached in a horizontal direction with a space between each row.

The invention described in claim 7 is characterized in that the second mass described in any one of claims 4 to 6 is made from the same material as the repair material that is applied to the base surface to form the reinforcing layer.

According to the method for repairing a cylindrical concrete structure described in claim 1, in the base surface formation step, a plurality of first blocks made of a plastic material are attached to the healthy surface at intervals, a straight rod having a perfect arc surface on its outer periphery is held in a vertical axial direction, and the arc surface is brought into contact with the first block, pressed in, and rolled to crush the first block and form a crushed surface in the first block, thereby forming a first leveling body with the crushed surface as a base surface formation reference surface that indicates the position of the surface of the base surface, and the repair material is applied to the healthy surface along the base surface formation reference surface of the first leveling body to form a flat base surface, so that a flat and vertical base surface can be easily formed.

According to the method for repairing a cylindrical concrete structure described in claim 2, in the base surface formation step, the first blocks are attached to the healthy surface by arranging the first blocks vertically to form a row of first blocks, and attaching the rows of first blocks in a horizontally spaced arrangement. This results in a horizontal arrangement of rows of multiple base surface formation reference surfaces that are aligned vertically, making it easier to form a vertical base surface.

According to the cylindrical concrete structure repair method described in claim 3, the first mass is made of the same material as the repair material applied to the healthy surface to form the base surface, so there is no need to remove the first leveling body when forming the base surface, making it easier to form the base surface.

According to the method for repairing a cylindrical concrete structure described in claim 4, in the reinforcing layer forming step, a plurality of second blocks made of a plastic material are attached to the base surface at intervals, a straight rod having a perfect arc-shaped arc surface on its outer periphery is held in a vertical axial direction, a gauge member designed to a thickness equivalent to the thickness of the reinforcing layer is placed between the arc surface and the base surface, the arc surface is brought into contact with the second block, the gauge member is pressed until it is sandwiched between the base surface and the arc surface, and rolled to crush the second block and form a crushed surface in the second block, thereby forming a second leveling body with the crushed surface as the reinforcing layer formation reference surface indicating the position of the surface of the reinforcing layer, and the repair material is applied to the base surface along the reinforcing layer formation reference surface of the second leveling body to form a reinforcing layer with a flat surface, so that a reinforcing layer with a vertical surface can be easily formed.

According to the method for repairing a cylindrical concrete structure described in claim 5, the second leveling body is formed by using a rod body with the gauge member attached to the arc surface of the rod body. Therefore, when the arc surface of the rod body is brought into contact with the second block, the gauge member is reliably positioned between the arc surface and the base surface, making it easy to form the second leveling body.

According to the method for repairing a cylindrical concrete structure described in claim 6, in the reinforcing layer formation process, the second blocks are attached to the base surface by arranging the second blocks vertically to form a row of second blocks, and attaching the rows of second blocks in a horizontally spaced arrangement. This means that the rows of multiple vertically aligned reinforcing layer formation reference surfaces are aligned horizontally, making it easier to form a reinforcing layer with a vertical surface.

According to the cylindrical concrete structure repair method described in claim 7, the second mass is made of the same material as the repair material applied to the base surface to form the reinforcing layer, so there is no need to remove the second leveling body when forming the reinforcing layer, making it easier to form the reinforcing layer.

As described above, the present invention provides a method for repairing the vertical surfaces of a concrete structure that can easily make the surface of the base surface and reinforcing layer formed on the vertical surfaces of the concrete structure vertical, regardless of the skill level of the worker.

1 is a cross-sectional view showing an example of a state in which a first block is placed after a deteriorated layer on a vertical surface of a concrete structure is removed. FIG. FIG. 1 is a perspective view showing an example of a straight rod used in a method for repairing a vertical surface of a concrete structure according to the present invention. FIG. 2 is an enlarged end view showing a state in which a straight rod body is abutted against the first block shown in FIG. 1 . FIG. 4 is an enlarged end view showing the state in which the straight rod shown in FIG. 3 is pressed into the first block to form a first leveling body having a base surface forming reference surface. FIG. 5 is an enlarged end view showing the state in which a repair material is applied to a healthy surface and a base surface is formed along the base surface formation reference surface shown in FIG. 4 . FIG. 6 is an enlarged end view showing a state in which a second mass is placed on the base surface shown in FIG. 5 and a straight rod body having a gauge member attached thereto is brought into contact with the second mass. 7 is an enlarged end view showing the state in which the straight rod shown in FIG. 6 is pressed into the second block until the gauge member abuts against the base surface, forming a second leveling body having a reference surface for forming a reinforcing layer. 8 is an enlarged end view showing the state in which a repair material is applied to the base surface shown in FIG. 7 and a reinforcing layer is formed along the reinforcing layer formation reference surface shown in FIG. 7 .

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, an embodiment for carrying out the method for repairing a vertical surface of a concrete structure according to the present invention will be described in detail.
FIG. 1 is a cross-sectional view showing an example of a state in which a first block is placed after removing a deteriorated layer on a vertical surface of a concrete structure. FIG. 2 is a perspective view showing an example of a straight rod used in a method for repairing a vertical surface of a concrete structure according to the present invention. FIG. 3 is an enlarged end view showing a state in which a straight rod is abutted against the first block shown in FIG. 1. FIG. 4 is an enlarged end view showing a state in which the straight rod shown in FIG. 3 is pressed into the first block to form a first leveling body having a base surface formation reference surface. FIG. 5 is an enlarged end view showing a state in which a repair material is applied to a healthy surface, and a first leveling body is formed on the base surface formation reference surface shown in FIG. FIG. 6 is an enlarged end view showing the state in which a second block is placed on the base surface shown in FIG. 5 and a straight rod body with a gauge member attached is abutted against the second block. FIG. 7 is an enlarged end view showing the state in which the straight rod body shown in FIG. 6 is pressed into the second block until the gauge member abuts against the base surface to form a second leveling body having a reinforcing layer formation reference surface. FIG. 8 is an enlarged end view showing the state in which a repair material is applied to the base surface shown in FIG. 7 and a reinforcing layer is formed along the reinforcing layer formation reference surface shown in FIG. 7.

The method for repairing the vertical surface of a concrete structure according to the present invention includes a deteriorated layer removal process in which a deteriorated layer is removed to expose a healthy surface, a base surface formation process in which a resin-based or mortar-based repair material is applied to the healthy surface exposed by removing the deteriorated layer on the surface of the vertical surface of the concrete structure to fill in the irregularities of the healthy surface and form a flat base surface, and a reinforcing layer formation process in which a repair material is applied to the base surface formed in the base surface formation process to form a reinforcing layer with a thickness that can restore the strength of the concrete structure.

The concrete structure for which the present invention can be used is not particularly limited as long as it has a vertical surface. Furthermore, the vertical surface is not limited to a flat surface such as the wall of a building, but can also be a curved surface such as the inner surface of a manhole. In this example, the inner surface of a manhole will be used as an example of a vertical surface of a concrete structure.

First, in the deteriorated layer removal process, the deteriorated layer on the vertical surface of the concrete structure 1 is removed by high-pressure cleaning and chipping. The deteriorated layer is removed until the healthy surface 2, which is not deteriorated, is exposed. At this point, the exposed healthy surface 2 has irregularities due to the removal of the deteriorated layer.

After the deterioration layer removal process is completed, the base surface formation process is carried out. In the base surface formation process, a repair material is applied to the healthy surface 2 exposed by the deterioration layer removal process to fill in any irregularities that have occurred on the healthy surface 2, forming a flat base surface.

Specifically, first, a plurality of first masses 3 made of a plastic material are placed on the healthy surface 2 (see FIG. 1). The material of the first mass 3 is not particularly limited as long as it is a plastic material that deforms when pressed, but it is preferable to use a resin-based repair material such as mortar, photocurable resin, or thermosetting resin. In this example, a mass of epoxy resin is used. In addition, the repair material used to form the first mass 3 is the same as the repair material used to form the base surface described below. This allows the first leveling body formed from the first mass described below to be integrated with the base surface, and there is no need to remove the first leveling body when forming the base surface.
The size of the first block is not particularly limited as long as it is large enough to form a base surface formation reference surface on a first leveling body described later.

The arrangement of the first blocks 3 is not particularly limited as long as multiple blocks are arranged on the healthy surface 2, but in this example, the first blocks 3 are arranged in a row aligned vertically, with multiple rows of first blocks spaced apart horizontally (see Figure 1).

Once the first block 3 is in place, a straight rod 5 having a perfect arc surface 4 on its outer periphery is held in a vertical axial direction, and the arc surface 4 is brought into contact with the first block 3, pressed in, and rolled to crush the first block 3 and form a crushed surface on the first block 3, thereby forming a first leveling body 7 with the crushed surface as the base surface formation reference surface 6 that indicates the position of the base surface.

The straight rod body 5 used in this example is a round rod formed to have a perfectly circular cross section, and the entire circumferential surface 4 is an arcuate surface.
The straight rod body 5 is made of a transparent resin such as acrylic, and is provided with levels 8 at the top and bottom (see FIG. 2), allowing an operator to check whether the axial direction of the straight rod body 5 is held vertically using the levels 8. In this example, the entire circumferential surface of the straight rod body 5 is an arcuate surface 4, but this is not limited thereto, and only a portion of the circumferential surface of the straight rod body may be an arcuate surface. In this example, a level 8 containing liquid and air bubbles sealed in a transparent case is used, and the verticality of the straight rod body 5 can be confirmed by the position of the air bubbles, but there is no particular limitation as long as it allows the operator to confirm the verticality of the straight rod body 5.
The length of the straight rod 5 is not particularly limited either, and is selected according to the height of the vertical surface of the concrete structure to be repaired. When the first blocks are arranged in a row in the vertical direction as in this example, it is desirable for the straight rod 5 to have a length that allows a plurality of first blocks to be crushed at once.
In addition, the straight rod body 5 can be removably provided with a gauge member 9 designed to have a thickness equivalent to the thickness of the reinforcing layer formed in the reinforcing layer forming step described below (see FIG. 2). The gauge member 9 designed to have a thickness equivalent to the thickness of the reinforcing layer ensures a space equivalent to the design thickness T of the reinforcing layer between the straight rod body 5 and the base surface, and in this example is formed in a ring shape with a ring width W equivalent to the design thickness T of the reinforcing layer. By fitting and attaching the ring-shaped gauge member 9 thus configured to the outer periphery of the straight rod body 5, the ring portion of the gauge member 9 protrudes over the entire circumference of the outer periphery of the straight rod body 5.
The shape of the gauge member is not limited to this example, and may be any shape that can secure a space of a dimension equivalent to the design thickness T of the reinforcing layer between the straight rod body 5 and the base surface formation reference surface 6 when forming the reinforcing layer described below.

The formation of the first levelling body 7 will now be explained in more detail with reference to the drawings.
First, with the gauge member 9 removed, the arcuate surface 4 of the straight rod 5 is brought into contact with the first mass 3 while the axial direction of the straight rod 5 is held vertical (see FIG. 3), and then pressed until any point of the arcuate surface 4 comes into contact with the healthy surface 2 (see FIG. 4). From this state, the straight rod 5 is rolled to crush the first mass 3, forming a crushed surface on the first mass 3 that will become the base surface formation reference surface 6 of the first leveling body 7.
The straight rod 5 rolls at a position where it abuts against the most protruding part of the unevenness formed on the healthy surface 2. By doing so, when the repair material is applied along the base surface formation reference surface 6, which is the crushing surface described below, it is possible to reliably form a flat and vertical base surface with the recesses of the healthy surface 2 filled with the repair material.
In this manner, a first leveling body 7 is formed having a base surface forming reference surface 6 which indicates the position of the surface of the base surface.

In addition, in this example, the first blocks 3 are attached to the healthy surface 2 so as to form a row of first blocks aligned vertically, so a row of base surface formation reference surfaces 6 aligned vertically is formed. In addition, in this example, the rows of first blocks are attached so as to be spaced apart horizontally, so multiple rows of base surface formation reference surfaces 6 aligned vertically are formed in the circumferential direction.

After the first leveling body 7 is formed, a repair material is applied to the healthy surface 2 along the base surface formation reference surface 6 of the first leveling body 7 to form a flat base surface 10 (see Figure 5). The repair material used may be a known mortar or resin-based repair material, and is not particularly limited, but photocurable resin or thermosetting resin is preferably used, and epoxy resin is more preferably used.

In this example, a row of vertically aligned base surface formation reference surfaces 6 is formed, so that a vertical base surface 10 can be easily formed. Also, in this example, multiple rows of vertically aligned base surface formation reference surfaces 6 are formed in the circumferential direction, so that a vertical base surface 10 can be formed even more easily.

In the base surface formation process, a primer can be applied before placing the first block and before applying the repair material to form the base surface in order to improve adhesion between the first block and the healthy surface of the base surface. A known primer used in repair methods for concrete structures can be used as the primer.

Once the base surface 10 is formed, a reinforcing layer formation process is performed in which a reinforcing layer is laminated on the base surface 10. In the reinforcing layer formation process, first, the amount of wall thickness reduction of the concrete structure is calculated by subtracting the thickness of the concrete structure at the time of forming the base surface from the original thickness of the concrete structure, and the amount of reduction in the strength of the concrete structure is calculated from this amount of wall thickness reduction. Then, based on the amount of wall thickness reduction and the structure of the concrete structure and the properties of the repair material used to form the reinforcing layer, the thickness of the reinforcing layer that can restore the reduced strength is designed. In this specification, the designed thickness of the reinforcing layer is referred to as the design thickness T of the reinforcing layer.

Next, multiple second blocks 11 made of a plastic material are placed on the base surface 10. The second blocks 11 are made of a plastic material that deforms when pressed, and are preferably made of a block of mortar or a resin-based repair material. As a resin-based repair material, photocurable resin or thermosetting resin is preferably used, and epoxy resin is more preferably used.

In addition, in this example, the repair material used to form the second block 11 is the same as the repair material used to form the reinforcing layer described below. This allows the second leveling body formed from the second block 11 described below to be integrated with the reinforcing layer, and there is no need to remove the second leveling body when forming the reinforcing layer.

The size of the second block 11 is not particularly limited, but it is formed to a size that allows the reinforcing layer formation reference surface to be formed on the second leveling body described below.

The arrangement of the second blocks 11 is not particularly limited as long as multiple blocks are arranged on the healthy surface 2, but in this example, they are arranged in the same way as the first blocks 3, and are attached to the base surface 10 so as to form rows of second blocks 11 lined up vertically, and multiple rows of second blocks 11 are arranged horizontally with spaces between them.

After the second block 11 is placed, a straight rod body 5 having a perfect arc surface 4 on its outer periphery is held in a vertical axial direction, and the arc surface 4 is brought into contact with the second block 11, pressed in, and rolled to crush the second block 11 and form a crushed surface on the second block 11, thereby forming a second leveling body 13 with the crushed surface serving as the reinforcing layer formation reference surface 12 that indicates the position of the surface of the reinforcing layer.

The arcuate surface 4 of the straight rod 5 is pressed and rolled into the second mass 11 so that the thickness of the second leveling body 13 formed has a thickness corresponding to the thickness of the reinforcing layer.
In this example, a straight rod 5 (see FIG. 2) is used to which a gauge member 9 is attached, which is formed in a ring shape and has a ring width W corresponding to the design thickness T of the reinforcing layer. First, while holding the axial direction of the straight rod 5 vertically at a position where the gauge member 9 does not come into contact with the second block 11, the arc surface 4 of the straight rod 5 is brought into contact with the second block 11 (see FIG. 6), and the gauge member 9 is pressed until it comes into contact with the base surface 10 (see FIG. 7). Then, while holding the state in which the gauge member 9 comes into contact with the base surface 10, the straight rod 5 is rolled to crush the second block 11, forming a crushed surface on the second block 11 that will become the reinforcing layer formation reference surface 12 of the second leveling body 13. The rolling of the straight rod 5 is performed at a position spaced from the base surface 10 by the ring width W of the ring part of the gauge member 9, so that the thickness of the second leveling body 13 is the same as the ring width W of the gauge member 9, i.e., the same as the design thickness T of the reinforcing layer. In this manner, a second leveling body 13 having a reinforcing layer formation reference surface 12 indicating the position of the surface of the reinforcing layer having the design thickness T is formed.

In addition, in this example, the second blocks 11 are attached to the base surface 10 so as to form a row of second blocks aligned in the vertical direction, so that the reinforcing layer formation reference surface 12 is formed so as to be aligned in the vertical direction. In addition, in this example, the rows of the second blocks 11 are attached so as to be spaced apart in the horizontal direction, so that multiple rows of the reinforcing layer formation reference surface 12 aligned in the vertical direction are formed in the circumferential direction.

After the second leveling body 13 is formed, a repair material is applied to the base surface 10 along the reinforcing layer formation reference surface 12 of the second leveling body 13 to form a reinforcing layer with a flat surface (see Figure 8). The repair material used may be a known mortar or resin-based repair material, and is not particularly limited, but photocurable resin or thermosetting resin is preferably used, and epoxy resin is more preferably used.

In this example, a row of vertically aligned reinforcing layer formation reference surfaces 12 is formed, making it easier to form the vertical reinforcing layer 14. Also, in this example, multiple rows of vertically aligned reinforcing layer formation reference surfaces 12 are formed in the circumferential direction, making it even easier to form the vertical reinforcing layer 14.

According to the above-mentioned method for repairing the vertical surface of a concrete structure, in the base surface formation process, multiple first blocks 3 made of a plastic material are attached to the healthy surface 2 at intervals, and a straight rod 5 having a perfect circular arc surface on its outer periphery is held in a vertical axial direction, and the circular arc surface 4 is brought into contact with the first block 3, pressed in, and rolled to crush the first block 3 and form a crushed surface on the first block 3, forming a first leveling body 7 with the crushed surface as the base surface formation reference surface 6 that indicates the position of the surface of the base surface 10, and a repair material is applied to the healthy surface 2 to form a flat base surface 10 along the base surface formation reference surface 6 of the first leveling body 7, making it easy to form a vertical base surface 10.

In addition, in the base surface formation process, the first blocks 3 are attached to the healthy surface by arranging the first blocks 3 vertically to form a row of the first blocks 3, and attaching the rows of the first blocks 3 so that they are spaced apart horizontally. This means that the rows of the base surface formation reference surfaces 6 aligned vertically are aligned horizontally, making it easier to form the vertical base surface 10.

In addition, since the first block 3 is made of the same material as the repair material applied to the healthy surface 2 to form the base surface 10, there is no need to remove the first leveling body 7 when forming the base surface 10, which makes it easier to form the base surface 10.

In the reinforcing layer forming process, multiple second blocks 11 made of a plastic material are attached to the base surface 10 at intervals, a straight rod body 5 having a perfect arc surface 4 on its outer periphery is held in a vertical axial direction, a gauge member 9 designed to a thickness equivalent to the thickness of the reinforcing layer is interposed between the arc surface 4 and the base surface 10, the arc surface 4 is abutted against the second block 11, the gauge member 9 is pressed in until it is sandwiched between the base surface 10 and the arc surface 4, and rolled to crush the second block 11 and form a crushed surface on the second block 11, forming a second leveling body 13 with the crushed surface as the reinforcing layer formation reference surface 12 indicating the position of the surface of the reinforcing layer 14, and a repair material is applied to the base surface 10 to form a reinforcing layer 14 with a flat surface along the reinforcing layer formation reference surface 12 of the second leveling body 13, so that the reinforcing layer 14 with a vertical surface can be easily formed.

In addition, to form the second leveling body 13, a gauge member 9 is attached to the arcuate surface 4 of the straight rod body 5. When the arcuate surface 4 of the straight rod body 5 is brought into contact with the second block 11, the gauge member 9 is securely positioned between the arcuate surface 4 and the base surface 10, ensuring a space between the straight rod body 5 and the reinforcing layer that is equivalent to the design thickness T of the reinforcing layer, making it easier to form the second leveling body 13.

In addition, in the reinforcing layer formation process, the second blocks 11 are attached to the base surface 10 by arranging the second blocks 11 vertically to form rows of the second blocks 11, and then attaching the rows of the second blocks 11 in a horizontally spaced arrangement. This allows the rows of multiple vertically aligned reinforcing layer formation reference surfaces 12 to be aligned horizontally, making it easier to form the reinforcing layer 14 with a vertical surface.

The second mass 11 is made of the same material as the repair material applied to the base surface 10 to form the reinforcing layer 14, so there is no need to remove the second leveling body 13 when forming the reinforcing layer 14, making it easier to form the reinforcing layer 14.

Reference Signs List 1 Concrete structure 2 Healthy surface 3 First block 4 Circular arc surface 5 Straight rod 6 Base surface forming reference surface 7 First leveling body 8 Level 9 Gauge member 10 Base surface 11 Second block 12 Reinforcing layer forming reference surface 13 Second leveling body 14 Reinforcing layer

Claims (7)

A concrete structure repair method for repairing a vertical surface of a concrete structure, comprising:
The method includes a base surface forming process in which a deteriorated layer on the surface of a vertical face of a concrete structure is removed to expose a healthy surface, and a resin-based or mortar-based repair material is applied to the healthy surface to fill in the irregularities of the healthy surface to form a flat base surface; and a reinforcing layer forming process in which a repair agent is applied to the base surface formed by the base surface forming process to form a reinforcing layer having a thickness that allows the strength of the concrete structure to be restored.
In the base surface forming step,
A first mass made of a plastic material is attached to the healthy surface at intervals;
a straight rod having a perfectly circular arc surface on its outer periphery is held in a state in which its axial direction is vertical, and the arc surface is brought into contact with the first mass, pressed in, and rolled to crush the first mass and form a crushed surface in the first mass, thereby forming a first leveling body in which the crushed surface serves as a base surface formation reference surface that indicates the position of the surface of the base surface;
A method for repairing vertical surfaces of a concrete structure, comprising the steps of: applying the repair agent to the healthy surface along the base surface formation reference surface of the first leveling body to form a flat base surface.
In the base surface forming step,
A method for repairing vertical surfaces of a concrete structure as described in claim 1, characterized in that the first blocks are attached to the healthy surface by arranging the first blocks vertically to form a row of first blocks, and then attaching the rows of first blocks in a horizontal direction with multiple spaces between them. The method for repairing vertical surfaces of a concrete structure according to claim 1 or 2, characterized in that the first mass is made of the same material as the repair agent that is applied to the healthy surface to form the base surface. In the reinforcing layer forming step,
A second mass made of a plastic material is attached to the base surface at intervals;
a straight rod having a true arc-shaped arc surface on its outer periphery is held in a state in which the axial direction is vertical, a gauge member designed to a thickness equivalent to the thickness of the reinforcing layer is placed between the arc surface and the base surface, the arc surface is brought into contact with the second mass, and the gauge member is pressed in until it is sandwiched between the base surface and the arc surface, and rolled to crush the second mass and form a crushed surface in the second mass, thereby forming a second leveling body with the crushed surface as a reinforcing layer formation reference surface that indicates the position of the surface of the reinforcing layer;
A method for repairing vertical surfaces of a concrete structure as described in any one of claims 1 to 3, characterized in that the repair agent is applied to the base surface along the reinforcing layer formation reference surface of the second leveling body to form a reinforcing layer having a flat surface. The method for repairing vertical surfaces of a concrete structure according to claim 4, characterized in that the second leveling body is formed by using a straight rod body to which the gauge member is attached on the arcuate surface. In the reinforcing layer forming step,
A method for repairing vertical surfaces of a concrete structure as described in claim 4 or 5, characterized in that the second blocks are attached to the base surface by arranging the second blocks vertically to form a row of second blocks, and attaching the rows of second blocks in a horizontal direction with multiple spaces between them. A method for repairing vertical surfaces of a concrete structure as described in any one of claims 4 to 6, characterized in that the second mass is made from the same material as the repair agent applied to the base surface to form the reinforcing layer.

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