JP6458977B2 - Repair method for existing pipe parts - Google Patents

Description

  The present invention relates to a method for partially repairing locally generated cracks and cracks in an existing pipe such as a sewer pipe, separation of a seam, and the like.

  Existing pipes such as sewage pipes deteriorate with long-term use, and their useful life is generally about 50 years. Therefore, the number of sewer pipes that have exceeded the useful life is increasing year by year. Aged sewer pipes are deformed, cracked, etc., so the function of sewage flow is reduced, and groundwater and earth and sand around the sewer pipes flow into the sewer pipes through the cracks. A cavity is formed in the ground, causing the ground to sink. Furthermore, there is a situation that sewer pipes buried in the ground are easily affected by ground changes such as earthquakes, so that some repair is necessary at a predetermined time.

  There are two types of repair methods for sewage pipes: full repair (span repair) that repairs the entire sewage pipe installed between manholes, and partial repairs that partially repair cracks and breakage at specific locations. Generally, overall repair is adopted when the entire sewer pipe is aged and has many damaged parts, and the strength is also reduced.Partial repair is partially cracked or broken, although the strength of the entire sewer pipe is at a certain level. It is used when the water is leaked or leaked at the joint between structural unit pipes such as a fume pipe constituting the sewer pipe, and the surrounding groundwater or earth and sand flows into the sewer pipe.

  As a partial repair method, for example, a repair method using a repair covering described in Patent Document 1 is known. The repair covering body described in Patent Document 1 is shown in FIG. The covering 110 for repair is a sleeve 114 composed of three sleeve constituent members 112 arranged side by side in the circumferential direction of the existing pipe 100 to be repaired, and an outer peripheral surface of the sleeve 114 that is mounted on the outer periphery of the sleeve 114. And an annular elastic sheet member 116 sandwiched between the inner peripheral surface of the existing pipe 100 and an interposition member 118 interposed between the opposed end portions 113 of the plurality of sleeve constituent members 112 of the sleeve 114. doing. The elastic sheet member 116 has protrusions 116a that extend in the circumferential direction and project outwardly at both ends in the width direction on the outer peripheral surface thereof.

  In order to repair an existing pipe using this repair covering, the cylindrical sleeve 114 on which the elastic sheet member 116 is mounted is transported and arranged at a repair target location in the existing pipe 100, and then the interposition member 118 is placed next to the pipe. By interposing between the opposing end portions 113 of the matching sleeve constituent members 112, the sleeve constituent members 112 are moved away from each other to increase the diameter of the sleeve 114, thereby causing the elastic sheet member 116 to move to the inner periphery of the existing pipe 100. It is carried out by fixing in a pressed state on the surface.

  According to this covering for repairing, the protruding portion 116a of the elastic sheet member 116 is installed in a compressed state by being pressed against the inner surface of the existing pipe. Therefore, it is interrupted | blocked and a water stop can be ensured.

JP 2003-130282 A

  However, although the covering for repair of patent document 1 can ensure water-stopping, it is not enough to recover the strength when the strength of the tube is reduced due to a crack or the like in the existing tube. . That is, since the covering for repair of Patent Document 1 is composed of a rubber elastic sheet member and a sleeve made of a thin plate-like sleeve constituent member, it can be said that the function of improving the strength of the pipe is sufficient. Absent.

  Accordingly, an object of the present invention is an existing pipe partial repairing method for repairing locally repaired portions such as cracks and cracks generated in existing pipes, or separation between adjacent pipe constituent unit pipes. An object of the present invention is to provide an existing pipe partial repairing method capable of improving the strength of an existing pipe that has been secured with reduced water.

In order to solve the above problems, the existing pipe partial repair method according to claim 1 is:
An existing pipe partial repair method for repairing a repair target part of an existing pipe,
A cylindrical lining material in a cured state having a width capable of covering the entire inner surface of the existing pipe including the repair target portion over its entire circumference, inside the repair target portion in a state having deformability before hardening. An arrangement process to arrange;
A cylindrical sleeve having an outer diameter equal to or larger than the inner diameter of the lining material in an expanded state is disposed inside the lining material, and then the cylindrical sleeve is expanded to increase the diameter of the lining material. An adhesion process to press and adhere to the inner surface of the existing pipe;
A curing step of curing the lining material in a state in which the adhered state is maintained;
It is characterized by including.

  According to this configuration, the lining material is cracked by pressing the uncured deformable lining material with the cylindrical sleeve on the inner peripheral surface including the repair target portion such as cracks, cracks, and separation of the existing pipe. Therefore, it is possible to prevent inflow of groundwater or earth and sand from the surroundings of the existing pipe through a crack or the like. In addition, due to the presence of the lining material that is hardened and formed on the inner peripheral surface of the existing pipe, the strength of the existing pipe that has been lowered can be improved. In addition, the lining material can be hardened and contracted by curing it while the lining is pressed by the cylindrical sleeve, so there is no gap between the cured lining material and the existing pipe, and the lining material can be installed well. The state can be obtained. Therefore, it is possible to form a partial repair structure in which waterproofness is ensured and pipe strength is improved.

The existing pipe repair method according to claim 2 is:
The arranging step is performed by fixing a locking member to the inner surface of the existing pipe in advance and locking the lining material on a locking portion of the locking member.

  According to this configuration, the cylindrical sleeve is expanded inside the lining material by previously locking the lining material at a position close to the inner surface of the existing pipe so that the cylindrical sleeve can be easily introduced inside the lining material. The diameter can be easily adjusted.

The existing pipe partial repair method according to claim 3 is:
In the arranging step, a plate member having a locking hole at one end and a locking portion at the other end is bent into a cylindrical shape, and the locking portion is locked in the locking hole. The fixed cylindrical body is arranged inside the lining material and fixed.

  According to this configuration, the lining material can be arranged in advance near the inner surface of the existing pipe so that the cylindrical sleeve can be easily introduced inside the lining material. The work of expanding the diameter can be made easy.

The existing pipe partial repair method according to claim 4 is:
A cylindrical base portion disposed between the cylindrical sleeve and the lining material, and an annular shape that extends in the circumferential direction on the outer periphery of both end portions in the width direction of the base portion and is in close contact with the inner surface of the existing pipe After the annular sheet member having the protruding portion is mounted on the outer periphery of the cylindrical sleeve, the contact step is performed.

  According to this configuration, since each member is fixed in a state where the protrusions provided on the annular sheet member are in contact with the inner surface of the existing pipe, the inflow into the conduit of groundwater that can flow in through a crack or the like Can be more reliably prevented by the protrusion.

  Further, the present invention provides an existing cylindrical lining material that partially covers the inner surface of an existing pipe, and a cylindrical sleeve having an outer diameter equal to or larger than the inner diameter of the lining material in an expanded state. Provide pipe repair structure.

  According to the existing pipe partial repair method of the present invention, a complete partial repair structure in which water stoppage is ensured and pipe strength is improved by the presence of a lining material that is hardened so as to cover the repair target portion of the existing pipe. Can be formed.

(A) is a perspective view which shows the state which has arrange | positioned the lining material in the existing pipe, (B) is the sectional drawing. It is a perspective view which shows a cylindrical sleeve. It is a perspective view which shows a sleeve structural member. It is explanatory drawing which shows the connection part of an adjacent sleeve structural member. It is the top view (a) and side view (b) of an interposed member. It is a front view which shows the temporary assembly state of a cylindrical sleeve. It is a perspective view which shows a diameter expansion jig | tool. It is a figure explaining the diameter expansion work of the cylindrical sleeve using a diameter expansion jig. It is sectional drawing seen from the XX line direction of FIG. It is explanatory drawing explaining the attachment operation | work of an interposed member. It is a principal part enlarged view explaining the attachment state of an interposition member. (A) is an existing pipe internal perspective view of the state which completed the contact | adherence process, (B) is sectional drawing of the state which finished the hardening process. It is explanatory drawing of a cover. It is explanatory drawing which shows the state which installed the member for latching in the existing pipe inner surface. It is a perspective view which shows the member for latching. It is explanatory drawing which shows the state which locked the lining material to the member for locking. (A) is a perspective view of a cylindrical body, (B) is an expanded view of a cylindrical body. (A) is a perspective view which shows the state which has arrange | positioned the cylindrical body inside the lining material, (B) is the principal part detail drawing. It is a perspective view which shows an elastic sheet member. It is sectional drawing (a) and principal part detail drawing (b) of an elastic sheet member. It is sectional drawing which shows the other example of a protrusion part. (A) is a perspective view which shows the state which completed the repair method, (B) is sectional drawing. It is a perspective view of the covering for repair used for the conventional existing pipe partial repair.

  Hereinafter, the present invention will be described in detail with reference to the drawings. FIG. 1A is an explanatory view showing a state in which the lining material 12 is disposed in the existing pipe 100, and FIG. 1B is a cross-sectional view thereof. The existing pipe 100 is locally repaired (not shown) such as cracks and cracks and has a reduced strength, and groundwater and earth and sand are flowing into the existing pipe 100 from the surroundings.

  In the arrangement step in the present invention, a curable lining material 12 for covering the inner surface of the existing pipe 100 including the repair target part over the entire circumference is arranged inside the repair target part in the existing pipe 100. Before performing the arrangement step, the inner surface of the existing pipe 100 is cleaned as necessary, and a work for removing dirt or the like adhering to the inner surface is performed.

  The lining material 12 is a cylindrical lining material having a width capable of covering the repair target portion, and the outer diameter thereof is substantially the same as the inner diameter of the existing pipe 100.

  As the lining material 12, a lining material in which a base material made of a fiber material such as glass fiber is impregnated with a curable resin composition can be used. As the curable resin composition, a resin composition that cures with time or a resin composition that cures with heat can be used. Examples of the resin composition that cures with time include epoxy resins. When using a resin composition that cures over time, it is desirable to impregnate the substrate with the resin composition at the construction site. For example, when using an epoxy resin, after mixing an epoxy resin main material and a hardening | curing agent on-site, the base material is impregnated with the mixture.

  Since the lining material before curing is soft and deformable, as shown in FIGS. 1 (A) and 1 (B), the lining material 12 has a lower side below the existing pipe 100 when the arrangement process is completed. While being arranged along the shape of the curved surface on the side, the upper side is in a recessed state, and there is a slight space 200 between the lower side and the upper side. The lining material 12 is arranged in this way, and the arrangement process is completed in a state where a cylindrical sleeve (shown in FIG. 2) described later can be arranged inside the lining material 12.

  Next, an adhesion process for bringing the lining material 12 into close contact with the inner surface of the existing pipe 100 is performed. FIG. 2 is a perspective view showing an example of a cylindrical sleeve used in the contact process. The cylindrical sleeve 20 is arranged between three sleeve constituent members 22 arranged side by side in the circumferential direction, and the opposing end portions of each sleeve constituent member 22, and the sleeve member 22 is expanded between adjacent sleeve constituent members 22. And an interposition member 30 that fixes the spacers while separating them from each other.

  FIG. 3 is a perspective view of the sleeve constituting member 22. The sleeve constituent member 22 is made of a metal such as stainless steel and has an arc shape having a substantially constant radius of curvature, and two ribs 22A extend in the circumferential direction on the inner peripheral surface thereof. Further, the flange 22B is bent outward in the circumferential direction so as to be continuous in the circumferential direction at both ends in the width direction to improve rigidity.

  FIG. 4 is an enlarged view of a main part for explaining the shape of the opposed end portion 24 of the sleeve constituting member 22. The opposed end portions 24 of the sleeve constituent member 22 are formed in a substantially straight line so as to extend along the width direction of the sleeve constituent member 22, and tapered inclined portions 25 are provided at both ends in the width direction. It has been. A rectangular notch 26 is formed at a position near one rib 22A in the center in the width direction, and a tapered inclined portion 27 is provided from the notch 26 toward the other rib 22A. .

  Reference numeral 23 in the figure denotes a locking hole for detachably attaching a diameter expanding jig 40 (see FIG. 7) described later, and is spaced apart in the width direction at positions near both opposing ends of the sleeve component member 22. It is provided to make a pair. Further, as shown in FIG. 3, an abutting plate member 28 is attached to the outer peripheral surface in the vicinity of one opposing end portion so as to protrude in the circumferential direction by a predetermined length from the opposing end portion 24. The abutting plate member 28 prevents the lining material 12 from projecting to the inside of the cylindrical sleeve 20 from the gap formed between the opposed end portions 24 of the sleeve constituent member 22. A thin metal plate made of, for example, stainless steel, as shown in FIG. 4, covers the locking hole 23 from the outer peripheral surface, and locks the other sleeve constituent member 22 facing the opposite end 24. The hole 23 also has a size covering from the outer peripheral surface side.

  The interposition member 30 is made of a metal that does not rust, such as stainless steel, and is configured by each sleeve constituent member 22 by being interposed between the opposed end portions 24 of the sleeve constituent members 22 arranged side by side in the circumferential direction. The above-described lining material 12 (see FIG. 1) is pressed against the inner surface of the existing pipe 100 and is connected to the sleeve constituent members 22 with each other. In the present embodiment, as shown in FIG. 2, a total of three interposition members 30 are attached at one connection portion, and a total of nine interposition members 30 are used in the entire cylindrical sleeve 20. The central cutout 26 may not be provided, and two interposition members may be used for each connection portion.

  As shown in FIG. 5, the interposition member 30 includes two flat plate portions (a first flat plate portion 32 and a second flat plate portion) that are opposed to each other with an interval into which the opposing end portion 24 of the sleeve constituting member 22 can be inserted. 34), and a wedge portion 36 for expanding the diameter of the cylindrical sleeve 20 by being inserted between the opposed end portions 24 provided therebetween and facing each other. The wedge portion 36 has a pair of opposing surfaces 36a that abut against the inclined portions 25 and 27 (see FIG. 4) of the opposing end portion 24. As shown in FIG. 5A, which is a plan view. The distance between the front end and the rear end is gradually increased.

  As for the 1st flat plate part 32 and the 2nd flat plate part 34, the corner | angular part of the front end side is chamfered, the 1st flat plate part 32 opposes the internal peripheral surface of the sleeve structural member 22, and the 2nd flat plate part 34 is It faces the outer peripheral surface of the sleeve constituting member 22. Moreover, the 2nd flat plate part 34 is formed thinner than the 1st flat plate part 32, and as shown in FIG.5 (b) which is a side view, both sides extended from a front end to a rear end The edges are chamfered. By inserting the interposition member 30 between the opposing end portions 24 from both sides in the width direction of the sleeve constituting member 22 toward each other, the opposing end portion 24 can be connected. By sliding the inclined portions 25 and 27 of the opposed end 24 on the opposed surface 36a of the portion 36, the sleeve constituent members 22 can be moved away from each other in the circumferential direction. Hereinafter, the work of closely attaching the lining material 12 with the cylindrical sleeve 20 will be described in detail.

  FIG. 6 is a view showing the temporarily assembled cylindrical sleeve 20. In the temporary assembly, three sleeve constituent members 22 are arranged side by side in the circumferential direction, one of the three connection portions is connected in advance by the interposition member 30, and the other two connection portions are overlapped with each other. The cylindrical shape is smaller than the inner diameter of the lining material 12 and is temporarily fixed using the diameter expansion jig 40 so as to maintain the cylindrical shape.

  As shown in FIG. 7, the diameter expansion jig 40 is formed of an angle member having an L-shaped cross section, and a protrusion 42 that can be engaged with a locking hole 23 (shown in FIG. 3) of the sleeve component 22, The arm portion 44 is erected by engaging the protruding portion 42 into the locking hole 23, and a temporary fixing bolt 48 (see FIG. 6) for temporarily fixing the sleeve constituent member 22 is provided on the arm portion 44. A through hole 46 to be inserted is formed.

  Temporary fixing is performed by attaching a diameter expansion jig 40 to each sleeve component member 22 and inserting and fixing a temporary fixing bolt 48 into the through hole 46 of the arm portion 44. Thereby, as shown in FIG. 6, the two end portions of the sleeve constituting member 22 are overlapped to form a cylindrical shape having an outer diameter smaller than the inner diameter of the lining material 12.

  The temporary assembly expands the space 200 inside the lining material 12 by the operator lifting the upper part of the lining material 12 (see FIGS. 1A and 1B) already arranged in the existing pipe 100, The other operator arranges the sleeve constituting member 22 and the like inside the lining material 12 to obtain the state shown in FIG. The temporary assembly is preferably arranged so that a portion connected in advance by the interposition member 30 is located at the upper part. Thereby, the work of the connection part at the upper part can be omitted and the work can be performed only at the other two connection parts on the lower side, the work posture in the worker's existing pipe 100 can be made easier, and the construction work can be performed. It can be easily adjusted. Further, the lower two places can be arranged at a position higher than the lowermost part in the existing pipe 100, avoiding the work in the lowermost part, and even when water flows through the lowermost part of the existing pipe 100 The sleeve 20 can be attached.

  And the operation | work which presses the lining material 12 against the existing pipe 100 inner surface with the cylindrical sleeve 20 is performed. First, an operation of moving the overlapped portion of the sleeve constituent member 22 in the circumferentially separating direction is performed. FIG. 8 is a diagram for explaining the diameter expansion operation of the cylindrical sleeve 20 using the diameter expansion jig 40, and FIG. 9 is a cross-sectional view taken from the direction of the line XX in FIG.

  First, a temporary fixing bolt 48 (shown in FIG. 6) that temporarily fixes one of the two connection portions temporarily fixed by the diameter expansion jig 40 is removed, as shown in FIG. The diameter expansion jack 50 is set between the arm portions 44 of the diameter expansion jig 40 facing each other. The diameter expansion jack 50 includes a pair of claw parts 51 interposed between the arm parts 44 of the diameter expansion jig 40 and a cylinder part 52 that moves these claw parts 51 away from each other by supplying hydraulic pressure. have.

  One worker holds the diameter-expansion jack 50, and another worker drives the hydraulic pressure supply device P at a position near the one, thereby energizing the diameter-expansion jig 40 in a direction away from each other. As a result, the opposed end portions 24 of the sleeve constituent members 22 that are overlapped with each other are moved from the state shown in FIG. 9A to the circumferentially separated direction as shown in FIG. A predetermined gap is formed between 24.

  Next, an operation of attaching the interposition member 30 between the opposed end portions 24 separated in the circumferential direction is performed. In the interposition member 30, the tip of the wedge portion 36 of the interposition member 30 is interposed in a gap formed between the opposed end portions 24, and the opposed end portion 24 is between the first flat plate portion 32 and the second flat plate portion 34. Inserted from both sides in the width direction of the sleeve constituting member 22 so as to be inserted, and the rear ends thereof are hit with a hammer or the like, thereby temporarily connecting the opposed end portions 24 to each other. Then, the diameter expansion jack 50 and the diameter expansion jig 40 are removed and press-fitted into a proper position by the fixed jack 55 to connect the sleeve constituent members 22 to each other.

  FIG. 10 is an explanatory view for explaining the press-fitting work of the interposition member 30. FIG. As shown in FIG. 10, the fixing jack 55 includes a pair of claw portions 56 facing each other with a gap wider than the width of the sleeve constituent member 22, and these claw portions 56 are brought closer to each other by supplying hydraulic pressure. It has a cylinder part 57 to be moved, and one worker supports the fixing jack 55 with both hands so that these claw parts 56 come into contact with the proximal end of the interposition member 30, respectively. The fixing jack 55 is supported by both hands, and another operator drives the hydraulic pressure supply device P (see FIG. 8) at a position near the fixing jack 55, so that the interposition members 30 are moved closer to each other in the width direction of the sleeve constituent member 22. Move to.

  By this movement, as shown in FIG. 11, the interposition member 30 is press-fitted so that the first flat plate portion 32 and the second flat plate portion 34 are inserted between the opposed end portion 24 and the abutting plate member 28. Therefore, the sleeve constituting member 22 is moved in a direction in which the inclined portion 25 of the opposed end portion 24 abuts against the opposed surface 36a of the wedge portion 36 in the circumferential direction and is further away from each other. Similarly, the temporary fixing bolt 48 of the diameter expansion jig 40 that temporarily fixes the other connecting portion is removed, a gap is formed between the opposed end portions 24 by the diameter expansion jack 50, and the gap is interposed by the fixed jack 55. The member 30 is press-fitted.

  Therefore, each sleeve constituent member 22 is moved in a direction away from each other in the circumferential direction, and as a result, the diameter of the cylindrical sleeve 20 is increased. Since the cylindrical sleeve 20 has an outer diameter equal to or larger than the inner diameter of the lining material 12 in the expanded state, the lining material 12 is pressed against and closely adheres to the inner surface of the existing pipe 100. Thus, the adhesion process in the existing pipe partial repair method of the present invention is completed. FIG. 12A is a perspective view after the contact process. As illustrated, the lining material 12 is disposed between the cylindrical sleeve 20 and the existing pipe 100, and the outer peripheral surface of the lining material 12 and the inner peripheral surface of the existing pipe 100 are in close contact with each other.

  Next, a curing step for curing the lining material 12 is performed. The lining material 12 can be cured by setting the cylindrical sleeve 20 and leaving it standing when the lining material 12 is curable over time. The standing time varies depending on the resin composition to be used, but is usually 3 to 12 hours. When the lining material 12 is thermosetting, the lining material 12 can be cured by heating the lining material 12 from the inside with a heater or the like through the cylindrical sleeve 20.

  FIG. 12B is a cross-sectional view of the state where the curing process is completed. The existing pipe 100, the hardened lining material 12, and the cylindrical sleeve 20 are provided in this order from the outside. In this way, by forming a new reinforcing layer (cured cylindrical lining material 12) on the inner peripheral surface of the existing pipe 100, it is possible to improve the strength of the existing pipe 100 that has been lowered due to deterioration or the like. It becomes. Moreover, since the crack etc. of the repair object location 101 of an existing pipe are block | closed with the hardened lining material, water stoppage can also be ensured. Since the lining material 12 is cured while being pressed against the inner surface of the existing tube 100 by the cylindrical sleeve 12, the lining material 12 can be prevented from shrinking during the curing, and the lining material 12 can be prevented from shrinking between the cured lining material 12 and the existing tube 100. A good installation state of the lining material 12 can be obtained without any gaps.

  Depending on the required strength of the tube, the cylindrical sleeve 20 may be removed after the lining material 12 has been cured. However, if the cylindrical sleeve 20 is not removed, the cured lining material 12 is removed. Shrinkage over time can be prevented over a long period of time, and a gap can be prevented from being generated between the cured lining material 12 and the existing pipe 100.

  In the present embodiment, as shown in FIG. 4, the interposition member 30 is also attached to the central portion in the width direction of the sleeve constituent member 22 in order to reinforce the strength of the connection portion of the sleeve constituent member 22. This interposition member 30 is inserted between the inclined portion 27 of the opposing end portion 24 through the rectangular opening formed by the notch portion 26 of the opposing end portion 24 facing each other, and is press-fitted by the fixing jack 55 (FIG. 10). The Therefore, the strength of the connecting portion of the sleeve constituent member 22 together with the abutting plate member 28 can be reinforced.

  FIG. 13A is a diagram for explaining an attachment state of the cover member 60, and FIG. 13B is a perspective view of the cover member 60. As shown in FIG. 13A, a cover member 60 may be attached to the connection portion of the sleeve constituent member 22 so as to cover the connection portion after the interposition member 30 is attached. The cover member 60 is formed by bending a thin metal plate made of, for example, stainless steel, and is attached by an operator's hand. By attaching the cover member 60, it is possible to prevent foreign matter flowing through the existing pipe 100 from being caught on the end portions of the interposition member 30 and the sleeve component member 22.

  The existing pipe partial repair method of the present invention can be suitably applied to an existing pipe having a relatively large pipe diameter that can be entered by an operator. The size (inner diameter) of the tube diameter is, for example, 700 to 4000 mm, particularly 800 to 3500 mm.

  As described above, the lining material 12 is impregnated with a resin composition that is cured with time or a resin composition that is cured with heat on a base material composed of an inorganic fiber material or an organic fiber material. The base material impregnated with the resin composition may be coated with an outer protective film and an inner protective film that cover the outer surface and the inner surface, respectively.

  Examples of the inorganic fiber base material include knitted glass fibers and carbon fibers. Examples of the organic fiber substrate include nonwoven fabrics such as polyamide fibers and polyester fibers. The thickness of the lining material is, for example, 2 to 20 mm. It is preferable to use a thicker lining material as the diameter of the existing pipe to be repaired is larger.

  Next, another embodiment of the arrangement step in the method of the present invention will be described. FIG. 14 is an explanatory view showing a state in which a locking member for arranging the lining material is fixed to the inner surface of the existing pipe, and FIG. 15 is a perspective view of the locking member. As shown in the drawing, a plurality of locking members 70 are installed at intervals in the circumferential direction on the inner surface 100 a of the repair target portion of the existing pipe 100. As shown in FIG. 15, the locking member 70 has a substantially rectangular flat plate portion 72 and a locking portion 74 provided so as to stand up from the center of one surface 72 a of the flat plate portion 72. Yes. The locking portion 74 has a straight portion 74a and a bent portion 74b at the tip.

  The locking member 70 is installed on the existing pipe inner surface 100a by applying an adhesive to the surface 72b of the locking member 70 where the locking part 74 of the flat plate portion 72 is not provided. It can be performed by bonding and fixing. As another method, a hole may be provided in the flat plate portion 72 of the locking member 70 and a bolt may be driven against the inner surface of the existing pipe 100 through the hole.

  The locking member 70 is installed so that the tip of the bent portion 74b faces upward in the installed state. Thereby, the latching operation | work to the member 70 for latching of the lining material 12 can be performed smoothly. FIG. 16 is a cross-sectional view showing a state in which the lining material 12 is locked to the locking member 70. As shown in the drawing, the upper portion of the lining material 12 is locked by the locking member 70 and is suspended, and the lower portion of the lining material 12 is placed along the inner surface shape of the existing pipe 100. It becomes a state. Thus, the arrangement | positioning process of the lining material 12 is completed by latching the lining material 12. FIG. Thereafter, as described above, the lining material 12 is adhered and cured by the cylindrical sleeve 20 (see FIG. 2). As shown in the figure, the locking member 70 does not have to be provided on the lower side of the existing pipe 100, and may be provided on at least the upper side.

  In the embodiment described above, in order to introduce the cylindrical sleeve into the inside from the lining material arrangement state of FIGS. 1 (A) and (B), the lining material 12 arranged in a state where the upper side is recessed is concerned. It is necessary for the operator to lift the upper part, expand the space in which the cylindrical sleeve can be placed inside the lining material 12, and perform the work of arranging and expanding the diameter of the cylindrical sleeve in other spaces. In the embodiment, since the lining material 12 is locked in advance so as to be along the inner surface of the existing pipe, the arrangement and diameter expansion work of the cylindrical sleeve can be steadily performed, so that the construction work can be simplified and accurate. Figured.

  Next, still another form of the arrangement step in the method of the present invention will be described. FIG. 17A is a perspective view showing a cylindrical body used in the lining material arranging step, and FIG. 17B is a development view of the cylindrical body. As illustrated, the cylindrical body 80 has a shape formed by bending a single plate member 82 into a cylindrical shape. At one end in the length direction of the plate member 82, a plurality of locking holes 84 are provided at predetermined intervals in the length direction (circumferential direction). On the other hand, a locking portion 86 is formed at the other end. A plurality of locking holes 86 are provided in order to fix both ends at a position where the plate member 82 is bent to have an appropriate diameter, and the size of the diameter can be adjusted. The locking portion 86 is formed to extend outward in the length direction (circumferential direction) from the other end portion.

  FIG. 18A is an explanatory view showing a state in which the lining material 12 is arranged in a cylindrical body 80, and FIG. First, as shown in FIG. 1, after the lining material 12 is introduced into the existing pipe 100, the cylindrical body 80 shown in FIG. The locking hole 84 is locked. The outer diameter of the cylindrical body 80 in the locked state is substantially the same as the inner diameter of the lining material 12, and the outer surface of the cylindrical body 80 is in contact with the inner surface of the lining material 12, thereby arranging the lining material 12. Is maintained in a circular cross section. In the drawing, the ear portion 55 indicated by reference numeral 85 is a portion that is held by an operator in the locking operation, and may be provided as necessary. The ear portion 55 also has a function of preventing the end portion in the width direction of the lining material 12 from sagging. Therefore, it is preferable to arrange the cylindrical body 80 so that the ear portion 55 is positioned on the upper side in the existing pipe 100. The width of the portion of the plate member 82 where the ear portion 55 is not provided may be about 1/5 to 1/3 of the width of the lining material 12, and the width of the portion where the ear portion 55 is provided is the lining. It is substantially the same as or slightly smaller than the material 12.

  Thus, the arrangement step in this example is completed, and thereafter, similarly to the above-described embodiment, the cylindrical sleeve 20 shown in FIG. 2 is arranged further inside the cylindrical body 80, and the lining material 12 is attached to the existing pipe. The method of the present invention is completed by bringing the lining material 12 into a state of being in close contact with the inner surface of the 100 and curing the lining material 12. In this example, before the cylindrical sleeve 20 is introduced, the lining material 12 is arranged in advance along the inner surface of the existing pipe 100 by the cylindrical body 80, so that the cylindrical sleeve 20 is introduced or expanded. Becomes easy.

  Note that the lining material 12 arrangement method using the locking member 70 described in FIGS. 14 to 16 and the lining material 12 arrangement method described in FIGS. 17 and 18 may be used in combination.

  Next, another embodiment of the method of the present invention will be described. FIG. 19 is a perspective view showing an elastic sheet member used in the present embodiment. The elastic sheet member 90 is mounted on the outer periphery of the cylindrical sleeve 20 and is disposed between the lining material and the cylindrical sleeve 20 in the installed state.

  The elastic sheet member 90 has an annular shape that is pressed against the inner surface side of the existing pipe 100 together with the lining material 12 by the diameter expanding operation of the cylindrical sleeve 20. Specifically, as shown in the cross-sectional shape of FIG. 20A, the cylindrical base portion 92 that covers the outer periphery of the cylindrical sleeve 20 and the outer periphery of both end portions in the width direction of the base portion 92 are disposed. Each has an annular protrusion 94 extending along the circumferential direction and protruding outward. The protrusion 94 is in close contact with the inner surface of the existing pipe in the installed state.

  In the present embodiment, four protrusions 94 are provided on each side, four in total, and have a trapezoidal cross-sectional shape. As shown in FIG. 20 (b), which is an enlarged view of the main part (inside the round frame) of FIG. 20 (a), each of the four centers on one side has water that expands by absorbing moisture. Swelling rubber 96 is used. Therefore, when moisture is absorbed while being in contact with the inner surface of the existing pipe 100, the cylindrical sleeve 20 and the inner surface of the existing pipe 100 can swell and be brought into closer contact with each other. In addition, the protrusion part 94 is not limited to the said structure, The number may be increased / decreased and a cross section may be a semicircle shape. The width W between the two protruding ridges 94 is set to be the same as or slightly longer than the width of the lining material 12. FIG. 21 shows another example of the protrusion. The protruding portion 98 is made of an elastic member made of rubber or the like, and a plurality of hollow portions 99 are provided inside. The presence of the hollow part 99 can improve the earthquake resistance of the repair structure of the present invention.

  After the elastic sheet member 90 is mounted on the cylindrical sleeve 20, it is arranged inside the lining material 12 already arranged in the existing pipe, and the diameter expansion operation of the cylindrical sleeve 20 is performed in the same manner as in the above-described embodiment. As a result, as shown in FIG. 22A, the lining material 12 is pressed and adhered to the inner surface of the existing pipe 100, and the elastic sheet member 90 has the protruding portion 94 adhered to the inner surface of the existing pipe 100. The base portion 92 (see FIG. 20) is fixed between the lining material 12 and the cylindrical sleeve 20. Thereafter, the lining material 12 is cured as in the above-described embodiment.

  FIG. 22B shows a cross-sectional view after each member is installed. The existing pipe 100, the lining material 12, the elastic sheet member 90, and the cylindrical sleeve 20 are arranged in this order from the outside, and the base portion 92 of the elastic sheet member 90 is arranged between the lining material 12 and the cylindrical sleeve 20. The protrusion 94 is in direct contact with the inner surface of the existing pipe 100. Due to the presence of the protrusion 94, it is possible to reliably prevent the inflow of groundwater or earth and sand that can flow in through the crack 101 of the existing pipe. In the case of this example, in order to maintain the installation state of the elastic sheet member 90, the cylindrical sleeve 20 is installed as it is without being removed.

  The present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the gist of the present invention.

DESCRIPTION OF SYMBOLS 12 Lining material 20 Cylindrical sleeve 22 Sleeve constituent member 23 Locking hole 24 Opposite end part 25 Inclination part 26 Notch part 27 Inclination part 28 This plate member 30 Interposition member 32 1st flat plate part 34 2nd flat plate part 36 Wedge part 40 Expansion Diameter jig 42 Projection portion 44 Arm portion 46 Through hole 48 Temporary fixing bolt 50 Expansion jack 60 Cover member 70 Locking member 72 Flat plate portion 74 Locking portion 80 Cylindrical body 82 Plate-shaped body 84 Locking hole 86 Engagement Stop part 90 Elastic sheet member 92 Base part 94 Projection part 100 Existing pipe

Claims (4)

An existing pipe partial repair method for repairing a repair target part of an existing pipe,
A cylindrical lining material in a cured state having a width capable of covering the entire inner surface of the existing pipe including the repair target portion over its entire circumference, inside the repair target portion in a state having deformability before hardening. An arrangement process to arrange;
A cylindrical sleeve having an outer diameter equal to or larger than the inner diameter of the lining material in an expanded state is disposed inside the lining material, and then the cylindrical sleeve is expanded to increase the diameter of the lining material. An adhesion process to press and adhere to the inner surface of the existing pipe;
A curing step of curing the lining material in a state in which the adhered state is maintained;
Including
The existing pipe has an inner diameter of 700 to 4000 mm,
The existing pipe is a sewer pipe;
The cylindrical sleeve capable of expanding the diameter is disposed between three sleeve constituent members arranged side by side in the circumferential direction and the opposed end portions of the respective sleeve constituent members, and widens between adjacent sleeve constituent members. An interposition member that fixes the sleeve component member apart from each other,
A cylindrical base portion disposed between the cylindrical sleeve and the lining material, and an annular shape that extends in the circumferential direction on the outer periphery of both end portions in the width direction of the base portion and is in close contact with the inner surface of the existing pipe An existing pipe partial repairing method comprising performing the contact step after mounting an annular sheet member having a protruding portion on the outer periphery of the cylindrical sleeve . The arrangement step includes
The method according to claim 1, wherein a locking member is fixed to an inner surface of the existing pipe in advance, and the lining material is locked to a locking portion of the locking member. The arrangement step includes
A cylindrical shape that is fixed by bending a plate member having a locking hole at one end and a locking portion at the other end into a cylindrical shape, and locking the locking portion in the locking hole. The method according to claim 1, wherein a body is placed inside the lining material and fixed. An existing pipe partial repair method for repairing a repair target part of an existing pipe,
A cylindrical lining material in a cured state having a width capable of covering the entire inner surface of the existing pipe including the repair target portion over its entire circumference, inside the repair target portion in a state having deformability before hardening. An arrangement process to arrange;
A cylindrical sleeve having an outer diameter equal to or larger than the inner diameter of the lining material in an expanded state is disposed inside the lining material, and then the cylindrical sleeve is expanded to increase the diameter of the lining material. An adhesion process to press and adhere to the inner surface of the existing pipe;
A curing step of curing the lining material in a state in which the adhered state is maintained;
An existing pipe partial repair method including
A cylindrical base portion disposed between the cylindrical sleeve and the lining material, and an annular shape that extends in the circumferential direction on the outer periphery of both end portions in the width direction of the base portion and is in close contact with the inner surface of the existing pipe A method of performing the contact step after mounting an annular sheet member having a protruding portion on the outer periphery of the cylindrical sleeve.

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