Repair materials for existing pipelines, drainage equipment and design method for repair materials

Abstract

To secure the bond strength of a repair member and a filler, while reducing the cost of satin finish when an existing pipeline is repaired by using a repair member with satin finish and a filler.SOLUTION: A repair member 10 is a member that is inserted into an existing pipeline 51 to repair an existing vertically-extending pipeline 51. The repair member 10 comprises a vertically-extending vertical pipe 11, a seal member 30 which protrudes from the vertical pipe 11 outward in the radial direction and is elastically deformable, and a satin-finished area which is arranged on the outer peripheral surface of the vertical pipe 11 and applied with satin finish. The outer diameter D13 of the vertical pipe 11 is between 20 cm and 47 cm inclusive. With R as the outer diameter D13 of the vertical pipe 11, the vertical measurement D20 of the satin-finished area 20 is between 91 / R and 359 / R inclusive.SELECTED DRAWING: Figure 2

Description

[Technical field]

[0001] The present invention relates to a repair member for an existing pipeline, a drainage system, and a method for designing the repair member. [Background technology]

[0002] For example, Patent Document 1 discloses a repair member for repairing an existing pipeline. The repair member includes a vertically extending cylindrical body and a sealing member extending radially outward from the lower end of the cylindrical body. A part of the outer circumferential surface of the cylindrical body is sanded.

[0003] When repairing an existing pipeline, a repair member is inserted into the existing pipeline. At this time, the tip portion of the sealing member comes into contact with the inner circumferential surface of the existing pipeline and is bent in the axial direction of the repair member. After the repair member is inserted in this manner, mortar is filled into the space between the cylindrical body of the repair member and the inner circumferential surface of the existing pipeline above the sealing member. When the mortar hardens, the mortar and the sand-processed portion easily mesh together, and the adhesive strength between the repair member and the mortar can be increased. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Patent No. 6120681 Summary of the Invention [Problem to be solved by the invention]

[0005] By the way, the larger the dimension of the repaired part where the sand-filling process is performed, the stronger the adhesion strength between the repaired part and the mortar can be, but the processing cost of the sand-filling process increases. It is preferable to keep the processing cost of the sand-filling process as low as possible.

[0006] The present invention has been made in consideration of the above points, and its object is to provide a repair member for an existing pipeline, a drainage facility, and a method for designing a repair member that can reduce the processing cost of the matte finish while ensuring the adhesive strength between the repair member and the filler when repairing an existing pipeline using a matte finish repair member and a filler. [Means for solving the problem]

[0007] The repair member for an existing pipeline according to the present invention is a repair member inserted into an existing pipeline extending vertically in order to repair the existing pipeline. The repair member includes a vertically extending standpipe, an elastically deformable sealing member protruding radially outward from the standpipe, and a textured region provided on the outer circumferential surface of the standpipe and textured. The outer diameter of the standpipe is 20 cm or more and 47 cm or less. When the outer diameter of the standpipe is R, the upper and lower dimensions of the textured region are 91 / R or more and 359 / R or less.

[0008] As with the repair member for the existing pipeline described above, by making the top and bottom dimensions of the textured region 91 / R or more, for example, when filling material is filled between the repair member and the existing pipeline, the adhesive strength between the repair member and the filling material can be ensured. This makes it possible to prevent the repair member from falling out of the filling material. In addition, by making the top and bottom dimensions of the textured region 359 / R or less, the processing cost of the textured finish can be reduced. This makes it possible to reduce the processing cost of the textured finish while ensuring the adhesive strength between the repair member and the filling material.

[0009] According to another preferred embodiment of the present invention, the top and bottom dimensions of the matte finish area are equal to or greater than 3.82 / ((0.098-0.00176R)×R) and equal to or less than 22.6 / ((0.098-0.00176R)×R).

[0010] According to the above embodiment, by making the top and bottom dimensions of the textured area 3.82 / ((0.098-0.00176R)×R) or more, the adhesive strength between the repair member and the filler can be ensured. Also, by making the top and bottom dimensions of the textured area 22.6 / ((0.098-0.00176R)×R) or less, the processing cost of the textured area can be reduced.

[0011] According to another preferred embodiment of the present invention, the matte finish region is a sand-finished region that has been sand-finished.

[0012] According to the above aspect, the sand-applying process is performed by applying sand to the outer circumferential surface of the vertical pipe, thereby realizing the matte finish. Therefore, the processing cost of the matte finish can be further reduced.

[0013] According to another preferred embodiment of the present invention, the standpipe has a vertical tube portion extending vertically, a large diameter portion disposed below the vertical tube portion and above the sealing member and having an outer diameter larger than that of the vertical tube portion, a small diameter portion disposed below the large diameter portion and above the sealing member and having an outer diameter smaller than that of the large diameter portion, an upper connecting portion connecting the vertical tube portion and the large diameter portion, and a lower connecting portion connecting the large diameter portion and the small diameter portion. The outer diameter of the standpipe refers to the outer diameter of the vertical tube portion.

[0014] According to the above aspect, for example, when the filler is filled between the existing pipeline and the repair member, the filler is also filled around the lower connecting portion between the large diameter portion and the small diameter portion. Here, the filler hardens and engages with the lower connecting portion. The lower connecting portion connects the large diameter portion and the small diameter portion disposed below the large diameter portion, and is disposed facing downward rather than horizontally. Therefore, the filler disposed below the lower connecting portion and engaged with the lower connecting portion supports the lower connecting portion. In this way, the lower connecting portion of the repair member is supported by the hardened filler, so that the repair member is less likely to fall into the existing pipeline. Therefore, the repair member can be easily used to repair the existing pipeline, since the falling of the repair member can be suppressed.

[0015] Another drainage system according to the present invention includes any one of the repair members described above and an existing pipeline. The repair member is inserted into the existing pipeline so that the outer peripheral surface of the standpipe is spaced from the inner peripheral surface of the existing pipeline. The sealing member is in contact with the inner peripheral surface of the existing pipeline. A filling material is filled in the space between the standpipe and the existing pipeline.

[0016] According to the above-described drainage system, when an existing pipeline deteriorates or is damaged, the existing pipeline can be easily repaired by using the repair member of the present invention.

[0017] Another method for designing a repair member according to the present invention is a method for designing a repair member to be inserted into an existing pipeline extending vertically in order to repair the existing pipeline. The repair member includes a vertically extending standpipe, an elastically deformable sealing member protruding radially outward from the standpipe, and a textured region in which a textured surface is applied to the outer circumferential surface of the standpipe. In the design method, the outer diameter of the standpipe is set to 20 cm or more and 47 cm or less, and the upper and lower dimensions of the textured region are reduced as the outer diameter of the standpipe increases.

[0018] According to the above-mentioned design method of the repair member, when the outer diameter of the standpipe of the repair member is large, the upper and lower dimensions of the matte finish area can be reduced to reduce the processing cost of the matte finish. Also, when the outer diameter of the standpipe of the repair member is small, the upper and lower dimensions of the matte finish area can be increased to ensure the adhesive strength between the repair member and the filler, and the repair member can be prevented from falling out of the filler.

[0019] According to another preferred embodiment of the present invention, when the outer diameter of the standpipe is R, the upper and lower dimensions of the matte finish region are set to be 91 / R or more and 359 / R or less.

[0020] According to another preferred aspect of the present invention, the top and bottom dimensions of the matte finish area are set to be 3.82 / ((0.098-0.00176R)×R) or more and 22.6 / ((0.098-0.00176R)×R) or less. Effect of the Invention

[0021] According to the present invention, it is possible to provide repair parts for existing pipelines, drainage equipment, and a method for designing repair parts that can reduce the processing costs of the matte finish while ensuring the adhesive strength between the repair parts and the filler when repairing an existing pipeline using matte finish repair parts and filler. [Brief description of the drawings]

[0022] [Figure 1] FIG. 2 is a cross-sectional view of a drainage system having a manhole after being repaired using a repair member in an embodiment. [Diagram 2] FIG. [Diagram 3] FIG. [Figure 4] 4 is a cross-sectional view of the repair member taken along the line IV-IV in FIG. 1. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0023] Hereinafter, one embodiment of the present invention will be described. Note that the embodiment described here is not intended to limit the present invention in any particular way. In addition, the same reference numerals are used for members and parts that perform the same functions, and duplicated descriptions are omitted or simplified as appropriate.

[0024] 1 is a cross-sectional view showing a drainage system 100 including an inlet 50 after being repaired using a repair member 10 for an existing pipeline in this embodiment. Hereinafter, the repair member 10 for an existing pipeline will also be simply referred to as the repair member 10. The repair member 10 according to this embodiment is a member that is inserted into an existing pipeline in order to repair the deteriorated or damaged existing pipeline.

[0025] Here, the term "existing pipeline" refers to a pipeline that has already been installed, and is already in use as a pipeline through which water (e.g., drainage) flows. The existing pipeline may be one that is buried underground, or one that is disposed above ground. In this embodiment, the inlet 50 of the drainage system 100 is taken as an example of the existing pipeline. The drainage system 100 will be described below.

[0026] In this embodiment, as shown in Fig. 1, the drainage facility 100 is buried underground and is a facility through which drainage flows. "Drainage" means discharged water. Drainage includes so-called sewage and rainwater. Drainage is water for daily use discharged from facilities such as toilets, baths, and kitchen sinks.

[0027] The inlet 50 included in the drainage system 100 is, for example, a public inlet. However, the type of the inlet 50 is not limited to a public inlet. The inlet 50 includes a straight cylindrical portion 51 and a main body portion 52.

[0028] The straight cylinder portion 51 is a cylindrical member that extends vertically and opens upward. The upper end of the straight cylinder portion 51 is flush with the ground.

[0029] The main body 52 is a bottomed cylindrical body, and is connected to the straight cylinder part 51. Here, the main body 52 is disposed below the straight cylinder part 51, and is internally connected to the straight cylinder part 51. An inlet 55 and an outlet 56 are formed in the main body 52. ​​The inlet 55 and the outlet 56 open toward the side. An inlet pipe 61 connected to a facility (not shown) such as a toilet that discharges wastewater is connected to the inlet 55. An outlet pipe 62 connected to a sewer main pipe (not shown) from which wastewater is discharged is connected to the outlet 56.

[0030] In this embodiment, the inlet 55 and the outlet 56 are formed at positions facing each other. The positions of the inlet 55 and the outlet 56 in the main body 52 are not particularly limited. For example, the outlet 56 may be formed at the bottom of the main body 52 and open downward. In this embodiment, the number of the inlet 55 and the outlet 56 are each one, but are not particularly limited. In addition, the inlet 55 is smaller than the outlet 56, but the sizes of the inlet 55 and the outlet 56 are also not particularly limited.

[0031] An invert 57 connecting the inlet 55 and the outlet 56 is formed at the bottom of the main body 52. ​​The wastewater that flows into the main body 52 from the inlet 55 flows through the invert 57 toward the outlet 56.

[0032] In this embodiment, the manhole 50 is made of resin. That is, the straight tube portion 51 and the main body portion 52 are made of resin. Here, examples of the resin forming the manhole 50 include polyvinyl chloride resin and polypropylene resin. However, the material forming the manhole 50 is not limited to resin, and may be concrete, for example. The straight tube portion 51 and the main body portion 52 may be integrally formed, or may be formed by assembling a plurality of members. For example, the straight tube portion 51 may be formed by stacking a plurality of cylindrical members one above the other.

[0033] Furthermore, the shape of the masu 50 is not particularly limited. In this embodiment, for example, the outer peripheral shape and the inner peripheral shape of the straight cylinder portion 51 and the main body portion 52 of the masu 50 are circular in a plan view. However, the outer peripheral shape and the inner peripheral shape of the straight cylinder portion 51 and the main body portion 52 may be angular in a plan view. That is, the masu 50 may be a square masu.

[0034] Incidentally, for example, if a part of the straight tube portion 51 of the manhole 50 is deteriorated or damaged (hereinafter simply referred to as damage), the drainage water inside may leak from the damaged part (for example, damaged part A in FIG. 1). In this embodiment, therefore, a repair member 10 is used to repair the straight tube portion 51 of the manhole 50, which is an example of an existing pipeline. The repair member 10 is inserted into the straight tube portion 51 extending vertically in order to repair the manhole 50. Here, "repair" refers to restoring the function of the damaged manhole 50 as a pipeline. Repair using the repair member 10 prevents the drainage water flowing inside the manhole 50 from leaking to the outside, and prevents water outside the manhole 50 from entering through the damaged part.

[0035] 2 and 3 are a front view and a cross-sectional view of the repair member 10, respectively. FIG. 4 is a cross-sectional view of the repair member 10 taken along the line IV-IV in FIG. 1. In FIG. 4, the inlet pipe 61 and the outlet pipe 62 are omitted. As shown in FIG. 2, the repair member 10 according to this embodiment includes a vertical pipe 11, a sealing member 30, and a support member 40. The vertical pipe 11 has a cylindrical shape extending vertically. The material of the vertical pipe 11 is not particularly limited, but in this embodiment, the vertical pipe 11 is made of resin. The vertical pipe 11 has a vertical tube portion 12, a large diameter portion 13, a small diameter portion 14, an upper connecting portion 15, and a lower connecting portion 16. Here, the vertical tube portion 12, the upper connecting portion 15, the large diameter portion 13, the lower connecting portion 16, and the small diameter portion 14 are arranged in this order from the top to the bottom of the vertical pipe 11.

[0036] The vertical tube portion 12 is tubular and extends vertically, and is disposed above the large diameter portion 13. The small diameter portion 14 constitutes the lower end of the vertical pipe 11, and is disposed below the large diameter portion 13. The upper connecting portion 15 is disposed between the vertical tube portion 12 and the large diameter portion 13, and connects the vertical tube portion 12 and the large diameter portion 13. The lower connecting portion 16 is disposed between the large diameter portion 13 and the small diameter portion 14, and connects the large diameter portion 13 and the small diameter portion 14.

[0037] In this embodiment, the outer diameter D11 of the large diameter portion 13 is larger than the outer diameter D13 of the vertical tube portion 12. The outer diameter D12 of the small diameter portion 14 is smaller than the outer diameter D11 of the large diameter portion 13. In this embodiment, the outer diameter D13 of the vertical tube portion 12 is smaller than the outer diameter D12 of the small diameter portion 14. However, the outer diameter D13 of the vertical tube portion 12 may be the same as the outer diameter D12 of the small diameter portion 14, or may be larger than the outer diameter D12 of the small diameter portion 14. In this embodiment, the large diameter portion 13 is the portion of the vertical pipe 11 with the largest outer diameter.

[0038] In this embodiment, the outer peripheral surface of the upper connecting portion 15 has an upper inclined surface 17 that is inclined from the vertical tube portion 12 toward the large diameter portion 13. The upper inclined surface 17 is inclined radially outwardly of the stand pipe 11 as it moves from the vertical tube portion 12 toward the large diameter portion 13. The outer peripheral surface of the lower connecting portion 16 has a lower inclined surface 18 that is inclined from the large diameter portion 13 toward the small diameter portion 14. The lower inclined surface 18 is inclined radially inwardly of the stand pipe 11 as it moves from the large diameter portion 13 toward the small diameter portion 14.

[0039] 3, in this embodiment, the vertical dimension D31 of the lower connecting portion 16 is larger than the vertical dimension D32 of the upper connecting portion 15. The vertical dimension D33 of the vertical tube portion 12 is larger than the dimension D31 of the lower connecting portion 16 and is also larger than the dimension D32 of the upper connecting portion 15. However, the relationship between the dimensions D31, D32, and D33 is not limited to the above.

[0040] In this embodiment, as shown in FIG. 2, a sand processing area 20 is provided on the outer peripheral surface of the rise pipe 11. The sand processing area 20 is an example of a matte processing area, and is an area where the surface is uneven. The sand processing area 20 is an area where the outer peripheral surface of the rise pipe 11 is sanded. This sand processing is a process for roughening the surface and making it uneven, and is an example of matte processing. Here, for example, adhesive is applied to the area of ​​the outer peripheral surface of the rise pipe 11 corresponding to the sand processing area 20. Then, sand is sprinkled on the adhesive, and the area where the sand is sprinkled is pressed down to perform the sand processing. The area where the sand is sprinkled becomes the sand processing area 20. In the sand processing area 20, the outer peripheral surface of the rise pipe 11 becomes rough, and the outer peripheral surface of the rise pipe 11 is made uneven.

[0041] In this embodiment, the sand affixing processing area 20 is provided on the outer peripheral surface of each of the lower part of the vertical tube part 12, the upper connecting part 15, the large diameter part 13, the lower connecting part 16 and the small diameter part 14, i.e., the outer peripheral surface of the lower part of the standpipe 11. However, the position of the sand affixing processing area 20 is not particularly limited. For example, the sand affixing processing area 20 may be provided on the outer peripheral surface of the upper part of the standpipe 11, or on the outer peripheral surface of the central part of the upper and lower parts of the standpipe 11. In this embodiment, the upper and lower dimensions D20 of the sand affixing processing area 20 are set according to the outer diameter D13 of the standpipe 11. Details of the setting of the upper and lower dimensions D20 of the sand affixing processing area 20 will be described later.

[0042] In this way, by providing a sand-processed area 20 on the outer peripheral surface of the rise pipe 11, when the filler 60 (see Figure 1) described later is filled into the space between the manhole 50 and the rise pipe 11 and hardened, the filler 60 and the sand-processed area 20 can easily interlock, thereby increasing the adhesion strength between the repair member 10 and the filler 60.

[0043] As shown in Fig. 2, the sealing member 30 is disposed along the periphery of the outer circumferential surface of the rise pipe 11 and protrudes radially outward from the rise pipe 11. In this embodiment, the sealing member 30 is attached to the lower end of the rise pipe 11, here, the lower end of the small diameter portion 14. The vertical tube portion 12, the upper connecting portion 15, the large diameter portion 13, the lower connecting portion 16, and the small diameter portion 14 of the rise pipe 11 are disposed above the sealing member 30. Note that the sealing member 30 may be attached to a portion other than the lower end of the rise pipe 11.

[0044] As shown in FIG. 4, the sealing member 30 is annular and is formed over the entire circumference of the outer circumferential surface of the standpipe 11. Here, the outer circumferential shape of the sealing member 30 corresponds to the inner circumferential shape of the straight cylindrical portion 51 of the manhole 50. When the inner circumferential shape of the straight cylindrical portion 51 is circular in a plan view as in this embodiment, the outer circumferential shape of the sealing member 30 is also circular in a plan view. In this embodiment, the outer diameter of the sealing member 30 is larger than the outermost diameter of the standpipe 11. Here, the outermost diameter of the standpipe 11 is the outer diameter D11 of the large diameter portion 13. Therefore, the outer diameter of the sealing member 30 is larger than the outer diameter D11 of the large diameter portion 13 of the standpipe 11.

[0045] The material of the sealing member 30 is not particularly limited. In this embodiment, the sealing member 30 is elastically deformable. Here, the sealing member 30 has flexibility and is formed of, for example, rubber. Specifically, the sealing member 30 is formed of ethylene propylene diene rubber (EPDM). However, the material forming the sealing member 30 is not limited to rubber. The method of attaching the sealing member 30 to the standpipe 11 is not particularly limited, but in this embodiment, the sealing member 30 is attached to the standpipe 11 by an adhesive.

[0046] As shown in FIG. 2, the support member 40 is located above the sealing member 30 and is in contact with the sealing member 30. Here, the support member 40 is bonded and fixed to the sealing member 30 by an adhesive. The thickness of the support member 40 is thinner than the thickness of the sealing member 30. The support member 40 may be formed of a material harder than the sealing member 30. Here, the support member 40 is made of resin. In this embodiment, the radial protrusion dimension of the support member 40 from the standpipe 11 is smaller than the radial protrusion dimension of the sealing member 30 from the standpipe 11. That is, the sealing member 30 protrudes radially outward from the support member 40. In addition, the outer diameter of the support member 40 is larger than the outermost diameter of the standpipe 11, which is the outer diameter D11 of the large diameter portion 13 here.

[0047] Next, a procedure for repairing the inlet 50 of the drainage system 100 will be described. For example, the straight cylindrical portion 51 of the inlet 50 may deteriorate or become damaged. This deterioration or damage may occur due to erosion caused by corrosive gases or deposits over a long period of use, or due to subsidence of the ground or load from the ground. Here, the repair member 10 is used to repair the deteriorated or damaged straight cylindrical portion 51.

[0048] When repairing the straight tube portion 51 of the inlet 50, as shown in FIG. 1, first, the repair member 10 is inserted into the straight tube portion 51 from the upper end of the straight tube portion 51. The repair member 10 is inserted into the center of the straight tube portion 51. Here, the repair member 10 is inserted into the straight tube portion 51 so that the outer peripheral surface of the vertical pipe 11 is separated from the inner peripheral surface of the straight tube portion 51. At this time, it is preferable to insert the repair member 10 so that the central axis of the repair member 10 and the central axis of the straight tube portion 51 overlap. However, since a part of the sealing member 30 protrudes outward from the support member 40, when the repair member 10 is inserted into the straight tube portion 51, the tip portion of the sealing member 30 comes into contact with the inner peripheral surface of the straight tube portion 51 and bends in the axial direction of the vertical pipe 11, in the opposite direction to the insertion direction (here, upward). In this way, the repair member 10 is inserted while the sealing member 30 is bent in the axial direction of the vertical pipe 11.

[0049] In this embodiment, the repair member 10 is inserted to a position above the inlet 55 and the outlet 56 of the manhole 50. Therefore, within the manhole 50, the repair member 10 is disposed at a position spaced apart from the bottom of the main body 52 (in other words, the invert 57).

[0050] After the repair member 10 is inserted into the straight tube portion 51 in this manner, a filler 60 is filled into the space between the standpipe 11 of the repair member 10 and the inner peripheral surface of the straight tube portion 51 above the sealing member 30. Here, mortar is used as the filler 60. However, the filler 60 is not limited to mortar, and for example, a liquid hardening injection material may be used as the filler 60. This hardening injection material is preferably an epoxy resin, an acrylic resin, or an unsaturated polyester resin that hardens at room temperature, which is inexpensive and has excellent adhesion.

[0051] In this manner, after the filler 60 is filled into the space between the standpipe 11 and the straight tube portion 51 above the sealing member 30, the filler 60 hardens. The repair of the straight tube portion 51 is completed by the filler 60 hardening. After the straight tube portion 51 of the manhole 50 is repaired, a lid 25 is detachably attached to the upper end of the standpipe 11 of the repair member 10.

[0052] Next, a method for designing the repair member 10 will be described. The design method for the repair member 10 here is a method for designing the repair member 10 to be inserted into the straight tube portion 51 in order to repair the straight tube portion 51 extending vertically, and is a method for setting the vertical dimension D20 (see FIG. 2) of the sand affixing processing area 20. In this embodiment, as described above, the vertical dimension D20 of the sand affixing processing area 20 is set according to the size of the outer diameter of the standpipe 11. Here, the outer diameter of the standpipe 11 refers to the outer diameter of the part that occupies the largest proportion of the parts that constitute the standpipe 11. In this embodiment, the proportion of the vertical tube portion 12 is the largest. Therefore, the outer diameter of the standpipe 11 refers to the outer diameter D13 of the vertical tube portion 12. Hereinafter, the outer diameter of the standpipe 11 is also referred to as the outer diameter D13.

[0053] In this embodiment, the vertical dimension D20 of the sand affixing region 20 is made smaller as the outer diameter D13 of the standpipe 11 increases. In other words, the dimension D20 of the sand affixing region 20 is made larger as the outer diameter D13 of the standpipe 11 decreases.

[0054] Next, a description will be given of the range of values ​​for the upper and lower dimensions D20 of the sand annealing region 20. The applicant prepared repair members 10 in the following Examples 1 and 2, and conducted load-bearing tests. The applicant set the range of values ​​for the upper and lower dimensions D20 of the sand annealing region 20 based on the results of the load-bearing tests.

[0055] <Example 1> As the repair member 10 of Example 1, a repair member 10 was prepared in which the inside diameter of the standpipe 11 was 20 cm and the outside diameter D13 was 21.6 cm, as shown in Table 1 below. The vertical dimension D20 of the sand processing area 20 in Example 1 was 20 cm, and the area of ​​the sand processing area 20 was 1357 cm 2 It is.

[0056] <Example 2> As the repair member 10 of Example 2, a repair member 10 was prepared in which the inside diameter of the standpipe 11 was 30 cm and the outside diameter D13 was 31.8 cm. The vertical dimension D20 of the sand-applied processing area 20 in Example 2 was 20 cm, and the area of ​​the sand-applied processing area 20 was 1998 cm. 2 In the repair members 10 of Examples 1 and 2, the large diameter portion 13, the small diameter portion 14, the upper connecting portion 15, and the lower connecting portion 16 are omitted.

[0057] In the repair members 10 prepared in Examples 1 and 2, a filler 60 was applied to the outer peripheral surface of the standpipe 11 and left until the filler 60 hardened. Here, Hijuster mortar manufactured by Hinode Suidokiki Co., Ltd. was used as the filler 60.

[0058] For the repair members 10 of Examples 1 and 2 to which the filler 60 was attached in this manner, a load-bearing test was carried out between the filler 60 and the repair member 10. Here, for the load-bearing test, a load was applied to the repair member 10 without applying a load to the filler 60, and the load at which the repair member 10 came out of the filler 60 was measured. Here, three load-bearing tests were carried out for each of the repair members 10 of Examples 1 and 2. The results of each load-bearing test of the repair members 10 in Examples 1 and 2 are shown in Table 1 below.

[0059] [Table 1]

[0060] As shown in Table 1, the load capacity of the repair member 10 of Example 1 against the filler 60 is 81.2 kN to 102.4 kN, and the adhesive strength per unit area is 0.060 kN / cm 2 ~0.075kN / cm 2 The adhesive strength per unit area here refers to the adhesive strength per unit area in the area of ​​the sand-applied region 20. The load-bearing capacity of the repair member 10 of Example 2 against the filler 60 was 83 kN to 90.6 kN, and the adhesive strength per unit area was 0.042 kN / cm 2 ~0.045kN / cm 2 It was.

[0061] Here, the load capacity is N (kN), and the adhesion strength per unit area is a (kN / cm 2 ), the outer diameter D13 of the vertical pipe 11 is R (cm), and the upper and lower dimensions D20 of the sand processing area 20 are H (cm), N = (πRH) × a (1) holds true.

[0062] From the above formula (1), for H, which is the upper and lower dimension D20 of the sand processing area 20, H = N / (πaR) (2) holds true.

[0063] From the above formula (2), it can be seen that as the outer diameter D13 of the standpipe 11 increases, the upper and lower dimensions D20 of the sand annealing region 20 decrease.

[0064] Here, consider the lower limit Hmin of the dimension D20 from above to below the sand application region 20. In this embodiment, the lower limit Hmin can be calculated based on the minimum value of the adhesive strength a per unit area, for example. From Table 1 above, the minimum value of the adhesive strength a per unit area is a = 0.042. From experience, the applicant of the present application believes that the minimum required load capacity N is 12 kN. Therefore, the load capacity N is set to 12 kN. Substituting these into the above formula (2), the lower limit Hmin of the dimension D20 is given as follows: Hmin = 12 / (3.14 x 0.042 x R) = 91 / R become.

[0065] The applicant of the present application believes that the upper limit Hmax of the vertical dimension D20 of the sand affixing processing area 20 is appropriate to be a value that can suppress the processing cost of the sand affixing processing. The dimension D20 that can suppress the processing cost is preferably less than about 18 cm, for example. Here, the range of the outer diameter D13 of the standpipe 11 is set to 20 cm to 47 cm. Therefore, within this range of the outer diameter D13 of the standpipe 11, the upper and lower dimensions D20 of the sand affixing processing area 20 are suppressed to less than about 18 cm. In order to satisfy these conditions, the upper limit Hmax of the dimension D20 can be set to 359 / R. Here, for example, when R, which is the outer diameter D13 of the standpipe 11, is set to 20 cm, which is the lower limit value of the outer diameter D13, the upper limit Hmax is 17.95 cm.

[0066] From the above, when the outer diameter D13 of the vertical pipe 11 is R, the vertical dimension D20 of the sand annealing region 20 is 91 / R or more and 359 / R or less.

[0067] Furthermore, in this embodiment, it has been noted that the adhesion strength a per unit area changes when the outer diameter D13 of the rise pipe 11 differs from the results of the load resistance test in Table 1 above. In Table 1 above, in Example 1, the minimum value of adhesion strength a per unit area is 0.060 when the outer diameter D13 of the rise pipe 11 is 21.6 cm (inner diameter is 20 cm), and in Example 2, the minimum value of adhesion strength a per unit area is 0.042 when the outer diameter D13 of the rise pipe 11 is 31.8 cm (inner diameter is 30 cm). Therefore, when the adhesion strength a per unit area is expressed as a linear function, a = 0.098-0.00176R (3) holds true.

[0068] Next, by substituting the above formula (3) into the above formula (2) and assuming that the load capacity N is 12 kN, the lower limit Hmin of the upper and lower dimensions D20 of the sand annealing processing area 20 is given by: Hmin=12 / (3.14×(0.098-0.00176R)×R) =3.82 / ((0.098-0.00176R)×R) ···(4) is set to.

[0069] As described above, it is preferable that the upper limit Hmax of the vertical dimension D20 of the sand affixing region 20 is less than about 18 cm. Here, the range of R, which is the outer diameter D13 of the vertical pipe 11, is set to 20 cm to 47 cm. In this range, in order to keep the dimension D20 less than about 18 cm, the upper limit Hmax of the dimension D20 is set to Hmax=22.6 / ((0.098-0.00176R)×R) ···(5) Here, for example, when R, which is the outer diameter D13 of the rise pipe 11, is set to 20 cm, which is the lower limit value of the outer diameter D13, the upper limit value Hmax becomes 17.99 cm.

[0070] From the above formulas (4) and (5), the upper and lower dimensions D20 of the sand annealing processing area 20 are equal to or greater than 3.82 / ((0.098-0.00176R)×R) and equal to or less than 22.6 / ((0.098-0.00176R)×R) (hereinafter referred to as the second range).

[0071] As described above, in the design method of the repair member 10 according to the present embodiment, as the outer diameter D13 of the standpipe 11 of the repair member 10 increases, the upper and lower dimensions D20 of the sand affixing region 20 are reduced. In this way, when the outer diameter D13 of the standpipe 11 of the repair member 10 is large, the upper and lower dimensions D20 of the sand affixing region 20 are reduced, thereby reducing the processing cost of the sand affixing process. In addition, when the outer diameter D13 of the standpipe 11 of the repair member 10 is small, the upper and lower dimensions D20 of the sand affixing region 20 are increased, thereby ensuring the adhesion strength between the repair member 10 and the filler 60, and preventing the repair member 10 from falling out of the filler 60.

[0072] In this embodiment, the outer diameter D13 of the vertical pipe 11 is 20 cm or more and 47 cm or less. When the outer diameter D13 of the vertical pipe 11 is R, the upper and lower dimensions D20 of the sand affixing processing area 20 are 91 / R or more and 359 / R or less. Here, 91 / R, which is the lower limit of the upper and lower dimensions D20 of the sand affixing processing area 20, is a value obtained by substituting 0.042, which is the minimum value of the bond strength a per unit area, and 12 kN, which is the load capacity considered to be the minimum required, into the above formula (2) in Table 1 above. Therefore, by setting the upper and lower dimensions D20 of the sand affixing processing area 20 to 91 / R or more, the bond strength between the repair member 10 and the filler 60 can be ensured. In this embodiment, 359 / R, which is the upper limit of the upper and lower dimensions D20 of the sand affixing processing area 20, is a value set in consideration of suppressing the processing cost of the sand affixing processing. Therefore, by setting the vertical dimension D20 of the sand affixing area 20 to 359 / R or less, the processing cost of the sand affixing process can be reduced. Therefore, the processing cost of the sand affixing process can be reduced while ensuring the adhesive strength between the repair member 10 and the filler 60. Here, when the straight tube portion 51 of the manhole 50 deteriorates or is damaged, the straight tube portion 51 can be easily repaired by using the repair member 10 according to this embodiment.

[0073] In this embodiment, the upper and lower dimensions D20 of the sand affixing processing area 20 are 3.82 / ((0.098-0.00176R)×R) or more and 22.6 / ((0.098-0.00176R)×R) or less. This numerical range is a numerical range that focuses on the fact that the adhesion strength a per unit area changes when the outer diameter D13 of the vertical pipe 11 is different, as shown in Table 1 above. Here, by setting the dimension D20 to 3.82 / ((0.098-0.00176R)×R) or more, the adhesion strength between the repair member 10 and the filler 60 can be ensured when a load capacity N of 12 kN, which is considered to be the minimum required, is applied to the repair member 10. In addition, by setting the upper and lower dimensions D20 of the sand affixing processing area 20 to 22.6 / ((0.098-0.00176R)×R) or less, the processing cost of the sand affixing processing can be reduced.

[0074] In this embodiment, the matte finish area is realized by forming the sand-finished area 20 by applying a sand-finishing process. The sand-finishing process is realized by a simple procedure of applying sand to the outer circumferential surface of the vertical pipe 11. Therefore, the processing cost can be further reduced.

[0075] In this embodiment, as shown in FIG. 2, the vertical pipe 11 of the repair member 10 has a vertical tube portion 12 extending vertically, a large diameter portion 13, a small diameter portion 14, an upper connecting portion 15, and a lower connecting portion 16. The large diameter portion 13 is disposed below the vertical tube portion 12 and above the sealing member 30, and has an outer diameter D11 larger than the outer diameter D13 of the vertical tube portion 12. The small diameter portion 14 is disposed below the large diameter portion 13 and above the sealing member 30, and has an outer diameter D12 smaller than the outer diameter D11 of the large diameter portion 13. The upper connecting portion 15 connects the vertical tube portion 12 and the large diameter portion 13. The lower connecting portion 16 connects the large diameter portion 13 and the small diameter portion 14. As a result, when the filler 60 is filled between the straight tube portion 51 of the manhole 50 and the repair member 10, the filler 60 is also filled around the lower connecting portion 16 between the large diameter portion 13 and the small diameter portion 14. Here, as the filler 60 hardens, the filler 60 engages with the lower connecting portion 16. The lower connecting portion 16 connects the large diameter portion 13 and the small diameter portion 14 arranged below the large diameter portion 13, and is arranged facing downward rather than horizontally. Therefore, the filler 60 arranged below the lower connecting portion 16 and engaged with the lower connecting portion 16 supports the lower connecting portion 16. In this way, since the lower connecting portion 16 of the repair member 10 is supported by the hardened filler 60, the repair member 10 is less likely to fall into the straight tube portion 51. Therefore, since the fall of the repair member 10 can be suppressed, it is easy to repair the straight tube portion 51 using the repair member 10.

[0076] In this embodiment, the standpipe 11 has the vertical tube portion 12, the large diameter portion 13, the small diameter portion 14, the upper connecting portion 15, and the lower connecting portion 16. However, the large diameter portion 13, the small diameter portion 14, the upper connecting portion 15, and the lower connecting portion 16 may be omitted. The standpipe 11 may be formed by the vertical tube portion 12 extending vertically.

[0077] In this embodiment, the sand-finished processing area 20 is an example of a matte finish area. However, the matte finish area is not limited to the sand-finished processing area 20, and it is sufficient that the outer peripheral surface of the stand pipe 11 is roughly processed to provide irregularities on the outer peripheral surface. The matte finish area may be realized by scraping the outer peripheral surface of the stand pipe 11 to provide irregularities on the outer peripheral surface. The matte finish area may be realized by attaching particles to the outer peripheral surface of the stand pipe 11. Here, the particles include sand, metal, and the like. [Explanation of symbols]

[0078] 10 Repair parts 11 Standpipe 12 Vertical cylinder part 13 Large diameter section 14 Small diameter section 15 Upper connection part 16 Lower connection part 20 Sand processing area 30 Sealing material 50 Inlet (existing pipeline) 51 Straight tube section (existing pipe)

Claims

1. A repair member that is inserted into an existing pipeline extending vertically in order to repair the existing pipeline, A vertical pipe extending up and down, A sealing member protruding radially outward from the vertical pipe and elastically deformable; A textured region provided on the outer peripheral surface of the vertical pipe and textured; Equipped with The outer diameter of the standpipe is 20 cm or more and 47 cm or less, When the outer diameter of the vertical pipe is R, the upper and lower dimensions of the matte finish area are 91 / R or more and 359 / R or less, A repair member for an existing pipeline, which, when inserted into the existing pipeline, fills the space between the existing pipeline and the standpipe above the sealing member with a filling material.

2. The repair member for an existing pipeline according to claim 1 , wherein the matte finish region is a sand-finished region that has been sand-finished.

3. The standpipe is A vertical cylinder portion extending vertically; a large diameter portion disposed below the vertical cylinder portion and above the sealing member, the large diameter portion having an outer diameter larger than an outer diameter of the vertical cylinder portion; a small diameter portion disposed below the large diameter portion and above the sealing member, the small diameter portion having an outer diameter smaller than an outer diameter of the large diameter portion; an upper connecting portion connecting the vertical tube portion and the large diameter portion; a lower connecting portion connecting the large diameter portion and the small diameter portion; having The repair member for an existing pipeline according to claim 1 or 2, wherein the outer diameter of the standpipe is the outer diameter of the vertical cylindrical portion.

4. A repair member according to any one of claims 1 to 3; Existing pipelines and Equipped with The repair member is inserted into the existing pipeline so that an outer peripheral surface of the standpipe is separated from an inner peripheral surface of the existing pipeline, The sealing member contacts an inner circumferential surface of the existing pipeline, A drainage system, wherein a space between the standpipe and the existing pipeline is filled with a filler material.

5. A method for designing a repair member to be inserted into an existing pipeline extending vertically in order to repair the existing pipeline, comprising the steps of: The repair member is A vertical pipe extending up and down, A sealing member protruding radially outward from the vertical pipe and elastically deformable; A textured region in which texture is applied to the outer peripheral surface of the vertical pipe; Equipped with When the repair member is inserted into the existing pipeline, a filler material is filled in the space between the existing pipeline and the standpipe above the sealing member, The outer diameter of the standpipe is 20 cm or more and 47 cm or less, A method for designing a repair member, the upper and lower dimensions of the matte finish area being reduced as the outer diameter of the vertical pipe increases.

6. The design method for a repair member according to claim 5, wherein, when the outer diameter of the vertical pipe is R, the upper and lower dimensions of the matte finish area are set to be 91 / R or more and 359 / R or less.

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