Support device for lining pipes, rehabilitation method for existing pipes

Abstract

This prevents deformation of the lining pipe due to the injection of filler material, while shortening the time required for installing and removing support structures. [Solution] The support device for a lining pipe of the present invention comprises a cylindrical lining pipe 2 to be installed inside an existing pipe 1, a reinforcing frame 5 provided on the outer surface of the lining pipe 2, a fixing plate 10 that engages with the reinforcing frame 5, and a connecting member 30 that connects the fixing plate 10 to the existing pipe 1 while the fixing plate 10 is engaged with the reinforcing frame 5. The side of the lining pipe 2 is supported by the existing pipe 1 via the fixing plate 10 and the connecting member 30.

Description

[Technical Field]

[0001] The present invention relates to a device for supporting a lining pipe used for rehabilitation of an existing pipe inside the existing pipe. [Background technology]

[0002] A lining method is known for rehabilitating existing pipes such as deteriorated sewer pipes, in which a cylindrical lining pipe is installed inside the existing pipe and a filler (backfilling material) is injected into the space formed between the existing pipe and the lining pipe to integrate the existing pipe and the lining pipe. Patent Documents 1 to 3 show examples of the lining method.

[0003] Figure 12 is a schematic diagram showing a cross section of an existing pipe 50 that has been rehabilitated by a lining method. A filler material 52 is injected into the space between the existing pipe 50 and a lining pipe 51 installed inside it through an injection hole (not shown) formed in the lining pipe 51, filling the space. The lining pipe 51 is made of a resin such as high-density polyethylene, and the filler material 52 is a hardening cement-based liquid. By filling the filler material 52, the existing pipe 50 and the lining pipe 51 are integrated to form a rehabilitated pipe.

[0004] In such a lining method, as the filler 52 is injected, pressure is applied from the filler 52 to the lining pipe 51, which may cause deformation of the lining pipe 51. More specifically, as shown in Figure 12, forces due to buoyancy (upward) in the directions indicated by the arrows, its own weight (downward), and filling pressure (sideways) act on the lining pipe 51 from the filler 52, and these forces cause the lining pipe 51 to bend and deform.

[0005] Therefore, in order to prevent such deformation of the lining pipe 51, prior to filling with the filler material 52, supports for supporting the lining pipe 51 from the inside are installed inside the lining pipe 51. Patent Document 4 shows an example of such supports.

[0006] Figure 13 is a schematic diagram showing the support installed inside the lining pipe 51. The support consists of vertical support 60 and horizontal support 70. The vertical support 60 is interposed between the ceiling and floor of the lining pipe 51 to support the lining pipe 51 in the vertical direction. The horizontal support 70 is interposed between the left and right side surfaces of the lining pipe 51 to support the lining pipe 51 in the horizontal direction.

[0007] The vertical support 60 consists of a pair of pillars 60a, 60a and a pair of pressure plates 60b, 60b. The pillars 60a, 60a extend vertically, and pressure plates 60b, 60b are interposed between the ends of each pillar and the ceiling and floor surfaces of the lining pipe 51. These pressure plates 60b, 60b are pressed against the ceiling and floor surfaces by the pillars 60a, 60a.

[0008] The horizontal support 70 consists of a pair of pillars 70a, 70a and a pair of pressure plates 70b, 70b. The pillars 70a, 70a extend horizontally, and pressure plates 70b, 70b are interposed between each end and the left and right side surfaces of the lining pipe 51. These pressure plates 70b, 70b are pressed against the left and right side surfaces by the pillars 70a, 70a.

[0009] After installing such supports 60, 70 inside the lining pipe 51, the space 54 between the existing pipe 50 and the lining pipe 51 is filled with filler material, thereby preventing the lining pipe 51 from deforming even if the force of the filler material 52 as shown in Figure 11 acts on the lining pipe 51. [Prior art documents] [Patent documents]

[0010] [Patent Document 1] Patent No. 5875553 [Patent Document 2] Patent No. 5875554 [Patent Document 3] Patent No. 5456937 [Patent Document 4] Patent No. 3377702 Summary of the Invention [Problem to be solved by the invention]

[0011] In the example shown in Fig. 13, shoring 60, 70 are installed in both the vertical and horizontal directions. However, the horizontal shoring 70 is less easy to install than the vertical shoring 60. The reason for this is that when erecting the horizontal supports 70a, 70a, workers on either side must hold the hold-down plates 70b, 70b with their hands to prevent the left and right hold-down plates 70b, 70b from falling, while another worker erects the supports 70a, 70a between the hold-down plates 70b, 70b.

[0012] 13, when rehabilitating an existing pipe 50 over a long distance, not only do many components such as supports and support plates become necessary, but it also takes a long time to install the supports 60, 70. In addition, after the rehabilitation of the existing pipe 50 is complete, there is the problem that removing the supports 60, 70 also takes time and effort.

[0013] Furthermore, in the case of Figure 13, the vertical support 60 and the horizontal support 70 create a grid-like structure inside the lining pipe 51, which causes problems when workers move back and forth inside the pipe or when injecting filler material.

[0014] In view of the above problems, an object of the present invention is to prevent deformation of the lining pipe due to the injection of filler material while shortening the time required for the installation and removal of support work. [Means for solving the problem]

[0015] The support device for a lining pipe according to the present invention comprises: Multiple tubes are connected in the axial direction. a cylindrical lining pipe to be installed inside an existing pipe; each Lined Pipe Both ends of on the outside of each a reinforcing frame provided thereon; The lining pipe is connected to two adjacent reinforcing frames, and both ends are connected to twoA fixing plate that is engaged with the reinforcing frame, and this fixing plate Two a connecting member that connects the fixing plate and the existing pipe while being engaged with the reinforcing frame; a spacer provided between the existing pipe and the lining pipe; And, The two reinforcing frames are sandwiched between the fixed plate and the spacer by the connecting member. The side of the lining pipe is supported on the existing pipe via a fixing plate and a connecting member.

[0016] In this way, the side of the lining pipe is in contact with the fixing plate. Through the reinforcing frame and spacer, Because the lining pipe is supported by the connecting members, deformation of the lining pipe due to the injection of filler can be prevented by simply providing vertical support without the need for horizontal support. This significantly reduces the time required for installing and removing support, and also eliminates the need for work and movement inside the lining pipe.

[0017] Furthermore, the method for rehabilitating existing pipes according to the present invention is as follows: A construction method for rehabilitating an existing pipe using the above-mentioned lining pipe support device, forming a lining pipe by forming the lining material into a cylindrical shape; Both ends of on the outside of each a step of attaching a reinforcing frame; and a step of placing a lining pipe in a predetermined location within the existing pipe. The connecting member sandwiches two adjacent reinforcement frames between the fixed plate and the spacer, The method includes a step of fixing the side of the lining pipe to the existing pipe using a fixing plate and a connecting member, and a step of injecting a filler material into the space between the existing pipe and the lining pipe.

[0018] In the present invention, it is preferable to provide the fixing plate and connecting member at the upper position of the side of the lining pipe to support the lining pipe to the existing pipe at the upper part. The fixing plate and connecting member may be provided at only one position on the side, or may be provided at multiple positions on the side as necessary. Also, the lining pipe may be supported to the existing pipe at both the upper and lower parts.

[0019] The fixing plate used in the present invention may be flat, or may have a shape with bent portions at both ends that engage with the reinforcing frame. The fixing plate may also have a spring portion in the center that is capable of elastic deformation. Furthermore, the fixing plate may have bent portions at both ends that engage with the reinforcing frame and a spring portion in the center that is capable of elastic deformation.

[0020] The reinforcing frame used in the present invention may have a slit into which the end of the fixing plate fits. Furthermore, the connecting member connecting the fixing plate to the existing pipe may be an anchor bolt and a nut that screws onto the anchor bolt. [Effects of the Invention]

[0021] According to the present invention, a simple structure that does not require horizontal support can prevent deformation of the lining pipe while significantly reducing the time required for installing and removing the support. [Brief explanation of the drawings]

[0022] [Figure 1] 1 is a schematic cross-sectional view of an existing pipe illustrating the present invention. [Figure 2] FIG. 1 is a perspective view of a single lined pipe. [Figure 3] FIG. 10 is a diagram showing a connection structure of adjacent lining pipes. [Figure 4] 1 is a diagram showing a main part of a first embodiment of the present invention. FIG. [Figure 5] FIG. 10 is a diagram showing a main part of a second embodiment of the present invention. [Figure 6] FIG. 10 is a diagram showing a main part of a third embodiment of the present invention. [Figure 7] FIG. 10 is a diagram showing a main part of a fourth embodiment of the present invention. [Figure 8] FIG. 10 is a diagram showing a main part of a fifth embodiment of the present invention. [Figure 9] FIG. 10 is a schematic cross-sectional view showing another example of a support structure for a lining pipe. [Figure 10]1 is a diagram showing the steps of the existing pipe rehabilitation method according to the present invention. [Figure 11] FIG. 10 is a schematic cross-sectional view of an existing pipe showing another embodiment of the present invention. [Figure 12] FIG. 10 is a schematic cross-sectional view showing the force acting on the lining pipe from the filler material. [Figure 13] FIG. 1 is a schematic cross-sectional view of an existing pipe showing conventional support. DETAILED DESCRIPTION OF THE INVENTION

[0023] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described with reference to the drawings. Throughout the drawings, identical or corresponding parts are designated by the same reference numerals.

[0024] FIG. 1 is a cross-sectional view schematically showing an existing pipe 1, a lining pipe 2 installed inside the existing pipe 1, and a support 100 installed inside the lining pipe 2. The existing pipe 1 is a sewer pipe, such as a concrete Hume pipe. A feature of the present invention is that, before filling a filler material into the space 4 formed between the existing pipe 1 and the lining pipe 2, the sides of the lining pipe 2 are supported to the existing pipe 1 by connecting members 30, which will be described later, as shown in dashed lines A and B. This means that only vertical support 100 needs to be installed inside the lining pipe 2, and no horizontal support is required. The present invention will be described in detail below with reference to FIGS. 2 to 9.

[0025] Figure 2 shows an example of a cylindrical lining pipe 2 used to rehabilitate an existing pipe. This shows a single lining pipe, and multiple such lining pipes connected in the axial direction are placed inside the existing pipe. The lining pipe 2 is formed into a cylindrical shape by bending a lining material such as high-density polyethylene and joining both ends 2d by heat fusion or the like. This lining pipe 2 has a recess 2a and multiple ribs 2b. The ribs 2b at the corners 2c have notches formed in them.

[0026] Figure 3 shows the connection structure of adjacent lining pipes. The connecting member 3 that connects the lining pipes 2, 2 is made of flexible synthetic resin and has convex portions 3a on both ends. The lining pipes 2, 2 are connected by lining multiple lining pipes 2 shown in Figure 2 lined up in the pipe axial direction and fitting the convex portions 3a of the connecting member 3 into the concave portions 2a of the lining pipes 2 as shown in Figure 3.

[0027] In addition, to reinforce the lining pipe 2, As shown in Figure 3, Lining pipe 2 Outer surfaces of both ends for, each A metal reinforcing frame 5 is attached. More specifically, a straight reinforcing frame is attached to the straight section 2s of the lining pipe 2 shown in Figure 2, and a curved reinforcing frame is attached to the corner section 2c. These reinforcing frames 5 are attached using connecting rods 6, clamps 7, nuts 8, etc. shown in Figure 3. The connecting rods 6 pass through holes (not shown) provided in each rib 2b.

[0028] Fig. 4 is a diagram showing a first embodiment of the present invention. In Fig. 4, (a) shows details of part A in Fig. 1, (b) is a left side view of the main part of (a), and (c) is a plan view of the main part of (a). The same applies to (a) to (c) in Figs. 5 to 8 described later. Note that part B in Fig. 1 is bilaterally symmetrical to part A, so its description will be omitted below.

[0029] As shown in Figure 4(a), the present invention uses a fixing plate 10 that engages with the reinforcing frame 5 of the lining pipe 2, and a connecting member 30 that connects the fixing plate 10 to the existing pipe 1 while the fixing plate 10 is engaged with the reinforcing frame 5. In this embodiment, the connecting member 30 comprises an anchor bolt 31 and a nut 32 that screws onto the anchor bolt 31. The fixing plate 10 is made of a flat metal plate, and has a hole 10m in the center, as shown in Figure 4(b).

[0030] Although not shown in Fig. 1, a spacer S with an L-shaped cross section is provided between the existing pipe 1 and the lining pipe 2, as shown in Fig. 4(c). This spacer S ensures a space 4 for injecting the filler material. In Fig. 4(a), the spacer S is indicated by a two-dot chain line. The same applies to Figs. 5 to 8, which will be described later.

[0031] The procedure for supporting the lining pipe 2 on the existing pipe 1 is as follows. First, with the connecting member 3 removed, the fixing plate 10 is inserted between the adjacent lining pipes 2, 2, and both ends of the fixing plate 10 are fixed to the lining pipes 2, 2. , 2 each Reinforcement frame 5 、5 The fixing plate 10 is inserted into the slit Y formed in the fixing plate 10. is provided across two adjacent reinforcing frames 5, 5, and both ends are Reinforcement frame 5 、5 The locking state is established.

[0032] Next, anchor bolts 31 are inserted into holes 10m provided in the fixing plate 10, and with the fixing plate 10 and the reinforcing frame 5 abutting against each other, the anchor bolts 31 are driven into the existing pipe 1. After that, nuts 32 are screwed onto the anchor bolts 31 to fasten the fixing plate 10 to the reinforcing frame 5. As a result, the lining pipe 2 is firmly fixed and supported to the existing pipe 1 by the fixing plate 10, anchor bolts 31, and nuts 32. In this case, as can be seen from FIG. 4(a), the two adjacent reinforcing frames 5, 5 are sandwiched between the fixing plate 10 and the spacer S by the connecting members 30 (anchor bolts 31 and nuts 32).

[0033] The fixing plate 10 used in the first embodiment is a vertically long flat plate, as can be seen in Figures 4(a) and (b). This makes metal processing easy, and the plate is wide in the longitudinal direction. Therefore, even if there is rebar in the existing pipe 1 where the anchor bolt 31 is to be driven, the fixing plate 10 can be shifted vertically in Figure 4(a) so that the anchor bolt 31 can be driven in, avoiding the rebar.

[0034] Fig. 5 shows a second embodiment of the present invention. In this embodiment, as shown in Fig. 5(b), the shape of the fixing plate 11 is different from the shape of the fixing plate 10 (Fig. 4(b)) of the first embodiment.

[0035] The fixing plate 11 is a flat metal plate, similar to the fixing plate 10 in Fig. 4, but has notches 11b formed at two corners of the vertical end. The other parts are the same as in Fig. 4, so a description of the overlapping parts will be omitted.

[0036] The procedure for supporting the lining pipe 2 on the existing pipe 1 is almost the same as that of the first embodiment. That is, with the connecting member 3 removed, a fixing plate 11 is inserted between the adjacent lining pipes 2, 2, and both ends of the fixing plate 11 are fixed to the lining pipes 2. , 2 respectively Reinforcement frame 5 、5 At this time, the notch 11b of the fixing plate 11 and the peripheral edge of the slit Y of the reinforcing frame 5 can be engaged with each other. Therefore, the fixing plate 11 is provided across two adjacent reinforcing frames 5, 5, and both ends thereof are engaged with the reinforcing frames 5, 5.

[0037] Next, anchor bolts 31 are inserted into holes 11m provided in the fixing plate 11, and with the fixing plate 11 and the reinforcing frame 5 abutting against each other, the anchor bolts 31 are driven into the existing pipe 1. After that, nuts 32 are screwed onto the anchor bolts 31 to fasten the fixing plate 11 to the reinforcing frame 5. As a result, the lining pipe 2 is firmly fixed and supported to the existing pipe 1 by the fixing plate 11, anchor bolts 31, and nuts 32. In this case, as can be seen from FIG. 5(a), the two adjacent reinforcing frames 5, 5 are sandwiched between the fixing plate 11 and the spacer S by the connecting members 30 (anchor bolts 31 and nuts 32).

[0038] The fixing plate 11 used in the second embodiment has a notch 11b formed in the corner portion, and this notch 11b engages with the peripheral portion of the slit Y of the reinforcing frame 5, thereby preventing the fixing plate 11 from falling when the anchor bolt 31 is driven in.

[0039] 6A and 6B are diagrams showing a third embodiment of the present invention. In this embodiment, as can be seen from Fig. 6A, the shape of the fixing plate 12 is different from the shapes of the fixing plates 10 and 11 of the first and second embodiments.

[0040] The fixing plate 12 is made of a metal plate and has a flat portion 12a and bent portions 12b formed on both sides of the flat portion 12a. Also, while the reinforcing frame 5 in Figures 4 and 5 has a slit Y, the reinforcing frame 5 in Figure 6 does not have a slit. Other parts are the same as those in Figures 4 and 5, and therefore a description of the overlapping parts will be omitted.

[0041] The procedure for supporting the lining pipe 2 on the existing pipe 1 is as follows. First, with the connecting member 3 removed, the fixing plate 12 is inserted between the adjacent lining pipes 2, 2, and as shown in FIG. 6(a), the bent portions 12b at both ends of the fixing plate 12 are inserted into the lining pipe 2. , 2 each Reinforcement frame 5 、5 The reinforcement frame 5 is placed in a position similar to holding the 、5 Engage with. As a result, the fixing plate 12 is provided across the two adjacent reinforcing frames 5, 5, and both ends thereof are locked to the reinforcing frames 5, 5.

[0042] Next, anchor bolts 31 are inserted into holes 12m provided in the flat portion 12a of the fixing plate 12, and with the bent portion 12b of the fixing plate 12 abutting against the reinforcing frame 5, the anchor bolts 31 are driven into the existing pipe 1. After that, nuts 32 are screwed onto the anchor bolts 31 to fasten the bent portion 12b of the fixing plate 12 to the reinforcing frame 5. As a result, the lining pipe 2 is firmly fixed and supported to the existing pipe 1 by the fixing plate 12, anchor bolts 31, and nuts 32. In this case, as can be seen from FIG. 6(a), the two adjacent reinforcing frames 5, 5 are sandwiched between the bent portion 12b of the fixing plate 12 and the spacer S by the connecting member 30 (anchor bolt 31 and nut 32).

[0043] The fixing plate 12 used in the third embodiment has bent portions 12b on both sides of the flat portion 12a that engage with the reinforcing frame 5, eliminating the need to form the slits Y shown in Figures 4 and 5 in the reinforcing frame 5, facilitating the processing of the reinforcing frame 5. Furthermore, as in the second embodiment, the bent portions 12b of the fixing plate 12 engage with the reinforcing frame 5, preventing the fixing plate 12 from falling when driving the anchor bolts 31.

[0044] Fig. 7 is a diagram showing a fourth embodiment of the present invention. This embodiment is a modification of the third embodiment shown in Fig. 6, and the shape of the fixing plate 13 is different from the shape of the fixing plate 12 in Fig. 6.

[0045] Fixing plate 13 is made of a metal plate that is thinner than fixing plate 12 in Fig. 6, and includes flat plate portion 13a, bent portions 13b formed on both sides of flat plate portion 13a, and spring portion 13c formed in the center of flat plate portion 13a. Unlike bent portion 12b in Fig. 6, bent portion 13b is formed in a clip-like shape that bends inward and is elastic. Furthermore, spring portion 13c is formed in a trapezoidal shape that rises above flat plate portion 13a, and is elastically deformable in the right direction in Fig. 7(a), i.e., in the driving direction of anchor bolt 31. The other parts are the same as those in Fig. 6, so a description of the overlapping parts will be omitted.

[0046] The procedure for supporting the lining pipe 2 on the existing pipe 1 is as follows. First, with the connecting member 3 removed, the fixing plate 13 is inserted between the adjacent lining pipes 2, 2, and as shown in FIG. 7(a), the bent portions 13b at both ends of the fixing plate 13 are inserted into the lining pipe 2. , 2 each Reinforcement frame 5 、5 Insert the fixing plate 13 into the reinforcing frame 5 、5 Engage with. As a result, the fixing plate 13 is provided across the two adjacent reinforcing frames 5, 5, and both ends thereof are locked to the reinforcing frames 5, 5.

[0047] Next, the anchor bolt 31 is inserted into the hole 13m provided in the spring portion 13c of the fixing plate 13, and with the bent portion 13b of the fixing plate 13 sandwiching the reinforcing frame 5, the anchor bolt 31 is driven into the existing pipe 1. After that, the nut 32 is screwed onto the anchor bolt 31 to fasten the fixing plate 13 to the reinforcing frame 5. At this time, the spring portion 13c of the fixing plate 13 elastically deforms in the driving direction of the anchor bolt 31. As a result, the lining pipe 2 is firmly fixed and supported to the existing pipe 1 by the fixing plate 13, anchor bolt 31, and nut 32. In this case, as can be seen from FIG. 7(a), two adjacent reinforcing frames 5, 5 are sandwiched between the bent portion 13b of the fixing plate 13 and the spacer S by the connecting member 30 (anchor bolt 31 and nut 32).

[0048] The fixing plate 13 used in the fourth embodiment has a spring portion 13c in the center, and since the spring portion 13c elastically deforms when the anchor bolt 31 is driven in, the fastening force to the reinforcing frame 5 is increased, and the lining pipe 2 can be more firmly fixed to the existing pipe 1. Also, there is no need to form a slit in the reinforcing frame 5, which makes it easier to process the reinforcing frame 5. Furthermore, since the bent portion 13b of the fixing plate 13 engages with the reinforcing frame 5, it is possible to prevent the fixing plate 13 from falling when the anchor bolt 31 is driven in.

[0049] Fig. 8 is a diagram showing a fifth embodiment of the present invention. This embodiment is a modification of the first embodiment shown in Fig. 4, and the shape of the fixing plate 14 is different from the shape of the fixing plate 10 in Fig. 4.

[0050] The fixing plate 14 is made of a flat metal plate and has a hole 14m in the center, as shown in Fig. 8(b). As is clear from comparing Fig. 4(b) with Fig. 8(b), the fixing plate 14 of this embodiment is shorter in the longitudinal direction (the vertical direction in Fig. 8) than the fixing plate 10 of Fig. 4. Also, while a slit Y is formed in the reinforcing frame 5 in Fig. 4, no slit is formed in the reinforcing frame 5 in Fig. 8. The other parts are the same as those in Fig. 4, so a description of the overlapping parts will be omitted.

[0051] The procedure for supporting the lining pipe 2 on the existing pipe 1 is as follows. First, with the connecting member 3 removed, the fixing plate 14 is inserted between the adjacent lining pipes 2, 2, and as shown in FIG. 8(a), the fixing plate 14 Both ends of Lining pipe 2 , 2 each Reinforcement frame 5 、5 abutting it against As a result, the fixing plate 14 is provided across the two adjacent reinforcing frames 5, 5, and both ends thereof are locked to the reinforcing frames 5, 5.

[0052] Next, anchor bolts 31 are inserted into holes 14m provided in the fixing plate 14, and with the fixing plate 14 engaged with the reinforcing frame 5, the anchor bolts 31 are driven into the existing pipe 1. After that, nuts 32 are screwed onto the anchor bolts 31 to fasten the fixing plate 14 to the reinforcing frame 5. As a result, the lining pipe 2 is firmly fixed and supported to the existing pipe 1 by the fixing plate 14, anchor bolts 31, and nuts 32. In this case, as can be seen from FIG. 8(a), the two adjacent reinforcing frames 5, 5 are sandwiched between the fixing plate 14 and the spacer S by the connecting members 30 (anchor bolts 31 and nuts 32).

[0053] The fixing plate 14 used in the fifth embodiment is a flat plate with a short longitudinal dimension, so it can be easily inserted between adjacent lining pipes 2, 2, and since there is no need to provide the slit Y shown in Figures 4 and 5 in the reinforcing frame 5, processing of the reinforcing frame 5 is easy.

[0054] Figure 9 shows another example of the support structure for the lining pipe 2. In Figure 1 described above, connecting members 30 are provided at the upper positions (sections A and B) on both sides of the lining pipe 2, and the lining pipe 2 is supported by the existing pipe 1 at the upper parts of both sides. In contrast, in Figure 9, connecting members 30 are also provided at the lower positions (sections C and D) on both sides of the lining pipe 2, and the lining pipe 2 is supported by the existing pipe 1 above and below on both sides.

[0055] As shown in Figure 9, if the lining pipe 2 is supported by the existing pipe 1 at the top and bottom of both sides, it is expected that deformation of the lining pipe 2 due to the injection of filler will be reduced. However, according to experimental results, there was almost no difference in the degree of deformation of the lining pipe 2 when the lining pipe 2 was supported only at the top and when it was supported at both the top and bottom. From this, it can be said that the object of the present invention can be fully achieved simply by providing the connecting member 30 at the top as shown in Figure 1.

[0056] According to the above-described embodiments, With the reinforcing frame 5 of the lining pipe 2 sandwiched between the fixing plates 10 to 14 and the spacer S,Because the sides of the lining pipe 2 are supported by the existing pipe 1 with the fixing plates 10-14 and the connecting member 30, there is no need to install horizontal supports inside the lining pipe 2 to prevent deformation of the lining pipe 2 due to the injection of filler material; instead, it is sufficient to install vertical supports 100 as shown in Figure 1. This reduces the time required for installing and removing supports, significantly shortening the construction period. Furthermore, because there are no grid-shaped structures like those shown in Figure 13 inside the lining pipe 2, there is no hindrance when workers move around inside the pipe or when injecting filler material.

[0057] FIG. 10 shows the steps of the existing pipe rehabilitation method according to the present invention.

[0058] In step P1, as shown in FIG. 2, the lining material is formed into a cylindrical shape to form a lining pipe 2.

[0059] In step P2, the reinforcing frame 5 is attached to the outer surface of the lining pipe 2 using the connecting rod 6, the clamp 7, the nut 8, and the like shown in FIG.

[0060] In process P3, the lining pipe 2 with the reinforcing frame 5 attached thereto is placed at a predetermined location within the existing pipe 1.

[0061] In step P4, as shown in FIGS. 1 and 4 to 8, With the reinforcing frame 5 of the lining pipe 2 sandwiched between the fixing plates 10 to 14 and the spacer S, The side of the lining pipe 2 is fixed to the existing pipe 1 by the fixing plates 10 to 14 and the connecting members 30 (anchor bolts 31, nuts 32).

[0062] In step P5, it is confirmed whether the specified number of lining pipes 2 have been fixed, and if not, the process returns to step P3, where the next lining pipe 2 is placed in a specified location within the existing pipe 1. In this case, the next lining pipe 2 is connected in the axial direction of the pipe to the previous lining pipe 2 (already fixed to the existing pipe 1) using the connecting member 3 shown in Figure 3. Then, the work of step P4 described above is carried out. Then, steps P3 to P4 are repeated until the specified number of lining pipes 2 have been fixed to the existing pipe 1.

[0063] When the specified number of lining pipes 2 have been fixed in step P5, the process moves to step P6. In step P6, as shown in Figure 1, vertical supports 100 are installed inside the lining pipe 2. As mentioned above, no horizontal supports are installed.

[0064] In step P7, a cement-based filler (not shown) is injected into the space 4 between the existing pipe 1 and the lining pipe 2. By going through the above steps, the rehabilitation work of the existing pipe 1 is completed.

[0065] The present invention can employ various embodiments other than those described above. For example, Fig. 1 shows an example in which the connecting member 30 is provided at one location on each side of the lining pipe 2, and Fig. 9 shows an example in which the connecting members 30 are provided at two locations on each side of the lining pipe 2, but the connecting members 30 may be provided at three or more locations.

[0066] 1 and 9, connecting members 30 are provided on both sides of the lining pipe 2, but as shown in Fig. 11, connecting members 30 may be provided not only on both sides of the lining pipe 2 but also on the ceiling and bottom (parts E to H of the dashed lines). In this way, the vertical support 100 shown in Fig. 1 and 9 is also unnecessary, so the work of installing the support can be completely omitted, further shortening the construction period.

[0067] 7, the fixing plate 13 is provided with the bent portion 13b and the spring portion 13c, but it is also possible to provide only the spring portion 13c without providing the bent portion 13b. In this case, both ends of the fixing plate 13 may be inserted into the slit Y provided in the reinforcing frame 5, as in FIGS. 4 and 5, or both ends of the fixing plate 13 may be abutted against the reinforcing frame 5, as in FIG. 8.

[0068] Also, in Figure 10, the lining pipe 2 is fixed to the existing pipe 1 and then the vertical support 100 is installed, but the lining pipe 2 may also be fixed to the existing pipe 1 after the vertical support 100 is installed.

[0069] In the above embodiment, anchor bolts 31 and nuts 32 are used as examples of connecting members 30, but other connecting members may also be used. For example, the shape of the spacer S shown in Fig. 4(c) may be modified as appropriate, and the connecting member may be formed by this spacer S and bolts (not shown) for fastening the fixing plate 10 to the spacer S. In this case, the spacer S is fixed to the existing pipe 1, and the fixing plate 10 is fixed to the existing pipe 1 via the spacer S.

[0070] Furthermore, in the above embodiment, the fixing plates 10 to 14 are metal plates, but the fixing plates 10 to 14 may be hard resin plates.

[0071] Furthermore, in the above embodiment, an example was given in which the existing pipe 1 was a sewer pipe, but the existing pipe 1 may also be a water pipe, a drainage pipe, a water conveyance tunnel, or the like. [Industrial Applicability]

[0072] The present invention can be used as a means for shortening the time required for installing and removing supports when rehabilitating existing pipes such as sewer pipes. [Explanation of symbols]

[0073] 1 Existing pipes 2. Lined pipe 3. Connecting members 4 Space 5 Reinforcement frame 10 Fixing plate 11 Fixing plate 11b Notch 12 Fixing plate 12a Flat plate part 12b Bend part 13 Fixing plate 13a Flat plate part 13b Bend part 13c Spring part 14 Fixing plate 30 Connecting member 31 Anchor bolt 32 Nut 100 Shoring S spacer Y slit

Claims

1. A cylindrical lining pipe that is connected in multiple axial directions and installed inside an existing pipe; a reinforcing frame provided on the outer surface of each end of each lining pipe; a fixing plate provided across two adjacent reinforcing frames with a plurality of the lining pipes connected thereto, the fixing plate having both ends engaged with the two reinforcing frames; a connecting member that connects the fixing plate and the existing pipe in a state in which the fixing plate is engaged with the two reinforcing frames; a spacer provided between the existing pipe and the lining pipe, A support device for a lining pipe, characterized in that the two reinforcing frames are sandwiched between the fixing plate and the spacer by the connecting member, and the side of the lining pipe is supported on the existing pipe via the fixing plate and the connecting member.

2. The lining pipe support device according to claim 1 , wherein the fixing plate and the connecting member are provided at an upper position on the side of the lining pipe.

3. The fixing plate is flat, The support device for a lining pipe according to claim 1 , wherein the reinforcing frame has a slit into which an end of the fixing plate is inserted.

4. A notch is formed at an end of the fixing plate, The support device for a lining pipe according to claim 3, wherein the notch and the reinforcing frame can be engaged with each other in a state where the end of the fixing plate is inserted into the slit.

5. 2. The support device for a lining pipe according to claim 1, wherein the fixing plate has bent portions at both ends thereof that engage with the reinforcing frame.

6. 2. The support device for a lining pipe according to claim 1, wherein the fixing plate has a spring portion at a center portion thereof that is capable of elastic deformation.

7. 2. The support device for a lining pipe according to claim 1, wherein the fixing plate has bent portions at both ends that engage with the reinforcing frame, and has a spring portion in the center that is elastically deformable.

8. 2. The support device for a lining pipe according to claim 1, wherein the connecting member comprises an anchor bolt and a nut threaded onto the anchor bolt.

9. 2. The support device for a lining pipe according to claim 1, wherein the ceiling and bottom of the lining pipe are supported on the existing pipe via the fixing plate and the connecting member.

10. A method for rehabilitating an existing pipe using the support device for a lining pipe described in claim 1, forming the lining material into a cylindrical shape to form the lining pipe; a step of attaching the reinforcing frames to the outer surfaces of both ends of the lining pipe, respectively; placing the lining pipe at a predetermined location within an existing pipe; a step of fixing a side portion of the lining pipe to the existing pipe using the fixing plate and the connecting member, with the two adjacent reinforcing frames sandwiched between the fixing plate and the spacer by the connecting member; and injecting a filler material into the space between the existing pipe and the lining pipe.

Images