JP2011080307A - Repairing method of linear cracking section of concrete wall and joint sealing method in joint of concrete wall - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To repair a cracking section of a concrete structure by a strong method, or to seal the joint forming part of the concrete structure by a method having high endurance. <P>SOLUTION: After forming a linear scraped groove 3 which is constituted by forming a narrow scraped groove 3A placed on the entrance side having a predetermined width A and a predetermined depth B and a wide scraped groove 3B having a width C larger than that of the narrow scraped groove 3A continuously with each other in the depth direction in the linear cracking 2 part of the concrete wall 1, repairs are made by filling a sealing material 11 such as mortar, resin or the like into the linear scraped groove 3. Alternatively, after forming a linear scraped groove 23 which is constituted by forming a narrow scraped groove 23A placed on the entrance side having a predetermined width A and a predetermined depth B and a wide scraped groove 23B having a width C larger than that of the narrow scraped groove 23A continuously with each other in the depth direction in the joint forming part 21 of the concrete structure 20, sealing is performed by filling a sealing material 41 such as mortar, resin or the like into the linear scraped groove 23. <P>COPYRIGHT: (C)2011,JPO&amp;INPIT

Description

  The present invention relates to a method for repairing a linear crack generating portion on a wall surface of a concrete water channel or a wall surface of a concrete structure (hereinafter collectively referred to as a “concrete wall”) and a large number of concrete wall bodies joined to each other. The present invention relates to a method for sealing joint portions in concrete wall joints (so-called “joint portions”) when building various concrete structures such as buildings.

  FIG. 13 shows a state in which a linear crack 102 having an indefinite shape is generated in a part of the wall body 101 of the concrete water channel. In such a case, as shown in FIG. Then, a linear groove 103 having an isosceles triangular cross section as shown in FIG. 14 (b) is formed along the linear crack 102 with a tapered conical drill 132 attached to the tip of the rotary shaft 131 of the rotary tool 130. After that, as shown in FIG. 14C, the linear groove 103 was filled with a filler 111 such as mortar or resin to repair the crack occurrence portion. However, in such a conventional repair method, as indicated by reference numeral 111 'in FIG. 14 (c), the sealing material filled in the crack generation portion often peeled off.

  As another example of repairing method of the linear crack generating part in the concrete wall, as illustrated in FIG. 15, the crack generating part 102 has a trapezoidal cross section with a trapezoidal cross section that is wide on the inlet 103A side and narrow on the back wall 103D side. A method in which the groove 103 is formed and filled with a sealing material 111 such as mortar or resin, or as shown in FIG. There is also a method of forming the groove 103 and filling the sealing material 111 such as mortar or resin in the groove 103, but the inlet side of the linear groove 103 formed by any of these methods is the inward portion. Since the opening is wider toward the outside than the side, the actual situation is that the filled sealing material often peels off as in the case of the repair method example shown in FIG.

  The inventor of the present application investigated literatures such as past patent documents on a repair method of a linear crack occurrence part in a concrete structure in view of the above circumstances, but could not find anything particularly useful. It was.

  The present invention has a first object of proposing a new repair method for a crack generating portion in a concrete structure, while the newly developed repair method for a crack generating portion is a joint portion (joint of a plurality of concrete walls). The second object is to improve the durability of the joint forming portion in the concrete structure by applying to the sealing method of (part).

  The present invention relates to a method for repairing a linear crack occurrence portion in a concrete wall (first invention) and a concrete wall joint seal obtained by applying the method of the first invention to a method for sealing a concrete wall joint (joint forming portion). It consists of a stopping method (second invention), and each of those inventions will be described below.

1st invention of this application As shown in Claim 1, the 1st invention of this application has a predetermined width A and a predetermined depth B in the linear crack 2 generating part in the concrete wall 1 at the entrance side. After forming the linear groove 3 formed by continuously connecting the narrow groove part 3A and the wide groove part 3B having a width C wider than the width of the narrow groove part 3A in the depth direction, the linear groove 3 Is filled with a sealing material 11 such as mortar or resin.

  With the above-described configuration, the sealing material 11 filled in the linear groove 3 has the wide portion 11B corresponding to the wide groove portion 3B, and the wide portion 11B corresponds to the wide groove portion 3B. Will be firmly fitted. Therefore, it is possible to reliably prevent the sealing material 11 from peeling off frequently in the conventional construction method.

Second Invention of the Present Invention The second invention of the present application, as shown in claim 2, is a width having a predetermined width A and a predetermined depth B on the joint forming portion 21 of the concrete structure 20 on the entrance side. After forming a linear groove 23 in which a narrow groove portion 23A and a wide groove portion 23B having a width C wider than the width of the narrow groove portion 23A are formed in the depth direction, a linear groove 23 is formed on the linear groove 23. It is characterized by filling a sealing material 41 such as mortar or resin.

  With the above-described configuration, the sealing material 41 filled in the linear groove 23 has the wide portion 41B corresponding to the wide groove portion 23B, and the wide portion 41B corresponds to the wide groove portion 23B. Will be firmly fitted. Accordingly, it is possible to reliably prevent the sealing material 41 from being peeled off frequently in the conventional construction method.

  According to the first invention of the present application, the narrow crack groove portion 3A having a predetermined width A and a predetermined depth B on the inlet side in the linear crack 2 generating portion in the concrete wall 1, and the narrow width After forming the linear groove 3 formed by continuously connecting the wide groove 3B having a width C wider than the width of the groove 3A in the depth direction, the sealing material 11 such as mortar or resin is formed in the linear groove 3. Since the sealing material 11 filled in the linear groove 3 has a wide portion 11B corresponding to the wide groove portion 3B, the wide portion 11B is in relation to the wide groove portion 3B. Thus, there is an effect that it is possible to reliably prevent the sealing material 11 from peeling off frequently occurring in the conventional construction method.

  According to the second invention of the present application, the joint forming portion 21 of the concrete structure 20 has a narrow groove portion 23A having a predetermined width A and a predetermined depth B on the inlet side, and the narrow cutting. After forming the linear groove 23 formed by continuously connecting the wide groove 23B having a width C wider than the width of the groove 23A in the depth direction, a sealing material 41 such as mortar or resin is provided in the linear groove 23. Since the sealing material 41 filled in the linear groove 23 has a wide portion 41B corresponding to the wide groove portion 23B so as to be filled, the wide portion 41B is compared with the wide groove portion 23B. It will be able to fit firmly and there exists an effect that peeling of the sealing material 41 which occurred frequently in the conventional construction method can be prevented reliably.

It is explanatory drawing of the linear crack generating part used as the repair object of the repair method of the linear crack generating part in the concrete wall of this-application 1st invention. It is explanatory drawing explaining the repair method of the linear crack generation | occurrence | production part shown by FIG. 1, (A) is explanatory drawing which shows the formation process for forming a linear groove in a linear crack generation | occurrence | production part, ( (B) is an explanatory view showing the shape of the linear groove formed in the linear crack generating portion, and (c) is an explanatory view showing a state in which the linear groove is filled with a sealing material. It is explanatory drawing which shows the modification 1 of the linear groove formed in a linear crack generating part in embodiment of the repair method of the linear crack generating part in the concrete wall of this-application 1st invention. It is explanatory drawing which shows the modification 2 of the linear groove formed in a linear crack generating part in embodiment of the repair method of the linear crack generating part in the concrete wall of this-application 1st invention. It is explanatory drawing which shows the modification 3 of the linear groove formed in a linear crack generating part in embodiment of the repair method of the linear crack generating part in the concrete wall of this-application 1st invention. It is explanatory drawing which shows the modification 4 of the linear groove formed in a linear crack generating part in embodiment of the repair method of the linear crack generating part in the concrete wall of this-application 1st invention. It is a perspective view which shows the concrete wall used as the object of the joint sealing method in the junction part of the concrete wall of this-application 2nd invention. It is explanatory drawing explaining the joint sealing method in the junction part of the concrete wall of this invention 2nd invention, (A) is explanatory drawing which shows the formation process for forming a linear groove in a junction part, (B) is An explanatory view showing the shape of a linear groove formed in a joined part, (c) is an explanatory view of a state in which a linear groove is filled with a sealing material. It is explanatory drawing which shows the modification 1 of the linear groove formed in a junction part in embodiment of the joint sealing method in the concrete wall of this-application 2nd invention. It is explanatory drawing which shows the modification 2 of the linear groove formed in a junction part in embodiment of the joint sealing method in the concrete wall of this-application 2nd invention. It is explanatory drawing which shows the modification 3 of the linear groove formed in a junction part in embodiment of the joint sealing method in the concrete wall of this-application 2nd invention. It is explanatory drawing which shows the modification 4 of the linear groove formed in a junction part in embodiment of the joint sealing method in the concrete wall of this-application 2nd invention. It is generation | occurrence | production condition explanatory drawing of the linear crack in the conventional concrete structure. It is explanatory drawing of the repair method of the linear crack generating part by the conventional method, (A) is explanatory drawing which shows the formation process for forming a linear groove in a linear crack generating part, (B) is a linear crack An explanatory view showing the shape of a linear groove formed in a generating part, (C) is an explanatory view of a state where a linear groove is filled with a sealing material. It is a situation explanatory view at the time of repairing a linear crack generating part by other conventional methods. It is a situation explanatory view at the time of repairing a linear crack generating part by other conventional methods.

  Hereinafter, with reference to FIG. 1 thru | or FIG. 12, the concrete wall linear crack repairing method (1st Example and the modifications 1-4) concerning the Example of this invention 1st invention, and the Example of this invention 2nd invention The joint sealing method (2nd Example and the modifications 1-4) in the junction part of the concrete wall concerning this is demonstrated.

First Embodiment FIG. 1 shows an indefinite linear crack 2 generated in a concrete wall 1 constituting a water channel.

  FIG. 2 shows a method of forming the linear groove 3 in the linear crack 2 generating portion in this embodiment.

  That is, in this embodiment, as shown in FIG. 2 (a), a rotary tool 30 having a drill 32 attached to the tip of a rotary shaft 31 is used, and the linear crack 2 in the concrete wall 1 is formed by the drill 32. As shown in FIG. 2 (b), a narrow groove portion 3A having a rectangular cross section on the inlet side and having a predetermined width A and a predetermined depth B, and the narrow cut A linear groove 3 is formed by continuously connecting a wide groove 3B having an inverted frustoconical cross section having a width C wider than the width of the groove 3A in the depth direction. Therefore, the shape of the drill 32 is the same as that of the linear groove 3. That is, the drill 32 includes a narrow portion 32A having a quadrangular cross section corresponding to the narrow groove portion 3A, and a wide portion 32B having an inverted frustoconical cross section corresponding to the wide groove portion 3B. It is constituted by.

  After the linear groove 3 is formed, a sealing material 11 made of mortar, resin, or the like (for example, acrylic, urethane, etc.) is formed in the linear groove 3 as shown in FIG. To solidify.

  In the linear groove 3, A: B: C = 2: 1: 4 is the fit between the wide groove 11 </ b> B in the repaired sealing material 11 and the wide groove 3 </ b> B in the linear groove 3. Although it is desirable in securing the combined strength, it is not limited to this dimensional ratio.

  The sealing material 11 filled in the linear grooves 3 as described above has an inverted frustoconical cross section corresponding to the wide groove section 3B having an inverted frustoconical cross section after solidification. The wide portion 11B is provided, and the wide portion 11B is securely fitted to the wide groove portion 3B. Therefore, it is possible to reliably prevent the sealing material 11 from peeling off frequently in the conventional construction method. As a result, the sealing material 11 can seal the linear crack 2 generation | occurrence | production part over a long period of time. In FIG. 2, reference numeral 11 </ b> A is a narrow portion corresponding to the narrow groove portion 3 </ b> A.

  By the way, as the shape of the linear groove 3, Modifications 1 to 4 shown in FIGS. 3 to 6 can be adopted.

  That is, the linear groove 3 shown in FIG. 3 includes a narrow groove portion 3A having a rectangular cross section on the inlet side and having a predetermined width A and a predetermined depth B, and the narrow groove portion 3A. The wide grooved portion 3B having a conical cross section having a width C wider than the width of the grooved portion 3A is made continuous in the depth direction.

  The linear groove 3A shown in FIG. 4 has a narrow groove part 3A having a rectangular cross section on the inlet side and having a predetermined width A and a predetermined depth B, and the narrow groove part. A wide groove portion 3B having a rectangular cross section having a width C wider than 3A is continuously formed in the depth direction.

  In the linear groove 3 in the case of FIG. 3 and FIG. 4, it is desirable that A: B: C = 2: 1: 4, but the dimensional ratio is not limited to this.

  The linear groove 3 shown in FIG. 5 has a narrow groove portion 3A having a rectangular cross section on the inlet side and having a predetermined width A and a predetermined depth B, and the narrow groove portion. A wide groove portion 3B having a triangular cross section having a width C wider than 3A is continuously formed in the depth direction.

  The linear groove 3 shown in FIG. 6 has a narrow groove part 3A having a rectangular cross section on the inlet side and having a predetermined width A and a predetermined depth B, and the narrow groove part. A wide groove portion 3B having a rectangular cross section having a width C wider than 3A is continuously formed in the depth direction.

  In the linear groove 3 in the case of FIG. 5 and FIG. 6, it is desirable that A: B: C = 2: 1: 3, but the dimensional ratio is not limited thereto.

Second Embodiment FIG. 7 shows a construction example in which a plurality of concrete walls 1, 1, 1 are joined to construct one concrete structure (for example, a building fence) 20. When constructing a concrete structure having such a wall joint structure, it is usual to fill a joint (joint portion) 21 between two adjacent concrete walls 1 and 1 with a sealing material made of pitch or the like. It is.

  8 (a), (b), and (c) show a construction example in the case where the joint portion 21 is filled with a sealing material such as mortar or resin by the method of the second invention of the present application. This will be described below.

  For the joint portion 21 between a pair of adjacent concrete walls 1 and 1 as shown in FIG. 7, a joint filler (for example, pitch) indicated by reference numeral 22 in FIG. Filled.

  And in the construction method of this 2nd Example, as shown in FIG. 8 (a), the rotary tool 30 which attached the drill 32 to the front-end | tip of the rotating shaft 31 is used, and the joint filling in the concrete wall 1 with the drill 32 is carried out. As shown in FIG. 8B along the material 22, a narrow groove portion 23A having a rectangular cross section on the inlet side and having a predetermined width A and a predetermined depth B, A linear groove 23 is formed in which a wide groove portion 23B having an inverted frustoconical cross section having a width C wider than the width of the narrow groove portion 23A is continuous in the depth direction. Therefore, the shape of the drill 32 is the same as that of the linear groove 23. That is, the drill 32 includes a narrow portion 32A having a rectangular cross section corresponding to the narrow groove portion 23A, and a wide portion 32B having an inverted frustoconical cross section corresponding to the wide groove portion 23B. It is constituted by.

  After the linear groove 23 is formed, a sealing material 41 made of mortar or resin (for example, acrylic, urethane, etc.) is formed in the linear groove 23 as shown in FIG. To solidify.

  In the linear groove 23, A: B: C = 2: 1: 4 is the fit between the wide groove 41B in the repaired sealing material 41 and the wide groove 23B in the linear groove 23. Although it is desirable in securing the combined strength, it is not limited to this dimensional ratio.

  The sealing material 41 filled in the linear grooves 23 as described above has an inverted frustoconical cross section corresponding to the wide groove section 23B having an inverted frustoconical cross section after solidification. The wide portion 41B is provided, and the wide portion 41B is firmly fitted to the wide groove portion 23B. Accordingly, it is possible to reliably prevent the sealing material 41 from being peeled off frequently in the conventional construction method. As a result, the sealing material 41 can seal the joint forming portion over a long period of time. In FIG. 8, reference numeral 41A denotes a narrow portion corresponding to the narrow groove portion 23A.

  By the way, as the shape of the linear groove 23, the first to fourth modifications shown in FIGS. 9 to 12 can be adopted.

  That is, the linear groove 23 shown in FIG. 9 has a narrow groove portion 23A having a rectangular cross section on the inlet side and having a predetermined width A and a predetermined depth B, and the narrow groove portion 23A. A wide groove groove portion 23B having a conical cross section having a width C wider than the width of the groove groove portion 23A is made continuous in the depth direction.

  A linear groove 3A shown in FIG. 10 has a narrow groove part 23A having a rectangular cross section on the inlet side and having a predetermined width A and a predetermined depth B, and the narrow groove part. A wide groove portion 23B having a rectangular cross section having a width C wider than 23A is continuous in the depth direction.

  In the linear groove 23 in the case of FIG. 9 and FIG. 10, it is desirable that A: B: C = 2: 1: 4, but the dimensional ratio is not limited to this.

  A linear groove 3 shown in FIG. 11 has a narrow groove portion 23A having a rectangular cross section on the inlet side and having a predetermined width A and a predetermined depth B, and the narrow groove portion. A wide groove portion 23B having a triangular cross section having a width C wider than the width of 23A is continuously formed in the depth direction.

  The linear groove 23 shown in FIG. 12 has a narrow groove part 23A having a rectangular cross section on the inlet side and having a predetermined width A and a predetermined depth B, and the narrow groove part. A wide groove portion 23B having a rectangular cross section having a width C wider than 23A is continuous in the depth direction.

  In the linear groove 23 in FIGS. 11 and 12, it is desirable that A: B: C = 2: 1: 3, but the dimensional ratio is not limited to this.

  The invention of the present application is not limited to the above-described embodiment, and it is needless to say that the design can be appropriately changed without departing from the gist of the invention.

  1 is a concrete wall, 2 is a linear crack, 3 is a linear groove, 3A is a narrow groove part, 3B is a wide groove part, 11 is a sealing material, 11A is a narrow part, 11B is a wide part, 20 is Concrete structure, 21 is a joint portion, 23 is a linear groove, 23A is a narrow groove portion, 23B is a wide groove portion, 41 is a sealing material, 41A is a narrow portion, 41B is a wide portion, and A is narrow The width of the groove portion, B is the depth of the narrow groove portion, and C is the width of the wide groove portion.

Claims (2)

  A narrow groove portion (3A) having a predetermined width (A) and a predetermined depth (B) on the inlet side at the linear crack (2) occurrence portion in the concrete wall (1), and the width After forming a linear groove (3) in which a wide groove (3B) having a width (C) wider than the width of the narrow groove (3A) is formed in the depth direction, the linear groove (3 ) Is filled with a sealing material (11) such as mortar or resin, and a method for repairing a linear crack occurrence portion in a concrete wall.   A narrow groove portion (23A) having a predetermined width (A) and a predetermined depth (B) on the entrance side of the joint forming portion (21) of the concrete structure (20), and the narrow width After forming a linear groove (23) in which a wide groove portion (23B) having a width (C) wider than the width of the groove portion (23A) is formed in the depth direction, the linear groove (23) is formed. A joint sealing method in a joint portion of a concrete wall, which is filled with a sealing material (41) such as mortar or resin.

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