JP2016141930A - Support member of rehabilitation pipe - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a support member of a rehabilitation pipe that prevents deformation and floating of the rehabilitation pipe due to buoyancy exerted on the rehabilitation pipe, and enables simple installation work.SOLUTION: A support member 1 includes an arc-shaped plate 3 having a circumference that equals to or is longer than an outer circumference of a rehabilitation pipe 102, a plurality of protrusions 4 disposed on an outer surface of the arc-shaped plate 3 in an axial direction, and a connecting member 7 connecting the plurality of arc-shaped plates 3 disposed in the pipe axial direction to each other. Among the protrusions 4, a pair of protrusions 6 disposed opposite each other on right and left when seen in the axial direction includes an engaging part 64 on both edge parts, protruding from the arc-shaped plate 3 in the axial direction. The connecting member 7 includes a connecting part 74 on both edge parts that may be fitted on the engaging part 64 of the pair of protrusions 6.SELECTED DRAWING: Figure 3

Description

  The present invention relates to a support member for a rehabilitation pipe used for rehabilitation of an existing pipe.

  Conventionally, it has been widely practiced to repair and rehabilitate existing pipes such as aging sewer pipes with rehabilitation pipes. The rehabilitation pipe is formed, for example, by winding a belt-like member having joints on both side edges in a spiral shape within an existing pipe and joining the joints of adjacent belt-like members. After pipe making, backfilling material such as mortar is injected into the gap between the rehabilitated pipe and the existing pipe, and the existing pipe and the rehabilitated pipe are integrated.

  When the backfilling material is injected into the gap between the existing pipe and the rehabilitation pipe, buoyancy acts on the rehabilitation pipe according to the inner volume and the density of the backfilling material. The buoyancy increases as the pipe diameter of the rehabilitation pipe increases, and the rehabilitation pipe rises and is pressed against the inner surface of the existing pipe, causing the circular cross-sectional shape to collapse and deform into an elliptical shape. If the rehabilitation pipe is deformed into an elliptical shape, the drainage gradient is changed, the drainage capacity is lowered, and the strength of the rehabilitation pipe is lowered, which is not preferable. Therefore, for example, measures have been taken to prevent deformation of the rehabilitation pipe by installing a plurality of support devices as disclosed in Patent Documents 1 and 2 at appropriate intervals inside the rehabilitation pipe.

  As shown in FIG. 17, this type of support device includes a plurality of support members 111 that are arranged inside the rehabilitation pipe 102 and support the rehabilitation pipe 102. The support material 111 is a columnar member and is provided in the rehabilitation pipe 102 in the vertical direction. As a result, the rehabilitation pipe 102 is supported from the inside, and the backfill material 104 prevents the rehabilitation pipe 102 from buckling or deforming or rising.

  In the rehabilitation pipe 102, a through hole for attaching the support material 111 is formed penetrating the top. After the filling of the backfill material 104, all the plurality of installed support devices 110 are disassembled and removed. When the support material 111 is removed from the rehabilitation pipe 102, a concave hole (support hole) of a withdrawal trace of the support material 111 is formed at the top of the inner surface of the rehabilitation pipe 102, which has been closed.

  Patent Document 3 proposes that a spacer is installed over the entire length of the existing pipe at the top of the existing pipe, and a backfilling material is injected into the gap between the existing pipe and the renovated pipe through the gap formed by the spacer. ing. However, this spacer is only intended to secure the injection path of the backfill material, and in order to install it in the heaven field area of the existing pipe, it is a process of fixing by driving anchor bolts etc. into the existing pipe Is needed.

Japanese Patent No. 2898195 JP-A-10-121565 Japanese Patent Laid-Open No. 7-100955

  In addition to the time and labor required to install and remove the support material, the conventional support device is used to form a through hole in the rehabilitation pipe or to close a hole in the support material extraction trace. Therefore, it has been difficult to shorten the work period for pipe rehabilitation.

  Moreover, when a support device is installed in the rehabilitation pipe, the resistance of water flowing down the pipe increases, which may cause the water level to rise. In a working environment with a high water level, the water level could rise further, making it impossible to perform rehabilitation work. In addition, when a sudden rise in water level is expected due to sudden heavy rain, etc., the worker must evacuate from the pipe, but if there are multiple support devices in the pipe, the evacuation may be hindered. there were.

  Further, the spacer disclosed in Patent Document 3 is not suitable for an aged existing pipe that requires rehabilitation. That is, the thickness of the existing pipe may be reduced due to corrosion or the like, and the spacer may not be sufficiently fixed. If reinforcing bars are embedded in the existing pipe, the anchor bolt may not be driven into the existing pipe. Even if the spacer can be fixed by the anchor bolt, the fixing work requires a lot of time and the working efficiency is also poor. Further, since the spacer is a long body, it is not easy to carry it in and install it in the existing pipe. In addition, the rehabilitation pipe is pressed against the spacer in the existing pipe, and the cross-sectional shape after construction has been deformed into an elliptical shape instead of a circle. With such a spacer, the rehabilitation pipe can be prevented from being deformed, Therefore, it was considered difficult to prevent the rehabilitation pipe from rising.

  The present invention has been made in view of the above-described problems, and the object of the present invention is to deform or float the rehabilitation pipe also due to the buoyancy acting on the rehabilitation pipe when the backfill material is injected. By providing a new support member that is easy to install and rehabilitating the existing pipe using this support member, the cross-sectional shape of the renovated pipe formed in the existing pipe can be appropriately set. An object is to enable efficient rehabilitation work in a short time by maintaining sufficient circularity and drainage capacity in the pipeline after rehabilitation while maintaining a circular shape.

  In order to achieve the above object, the present invention provides a support member for the rehabilitation pipe provided in the existing pipe when filling the backfilling material between the inner surface of the existing pipe and the outer surface of the rehabilitation pipe. An arc-shaped plate that is fixed to the upper side or the lower side in the existing pipe, and a plurality of protrusions that are disposed on the outer surface of the arc-shaped plate and maintain an interval between the inner surface of the existing pipe and the outer surface of the renovated pipe To prepare. The arc-shaped plate is provided with connecting means for connecting the arc-shaped plates at least on the right side and the left side when viewed from the axial direction, and the connecting means is axially along the outer surface of the arc-shaped plate and the outer surface of the rehabilitation pipe. It shall be arranged to support the rehabilitation pipe with the arcuate plate. And a some arcuate board is mutually connected by the said connection means, and it comprises so that it may arrange | position at intervals in the pipe-axis direction of an existing pipe.

  Thereby, the support member of the rehabilitation pipe is provided so that the arc-shaped plate covers the rehabilitation pipe over a half circumference of the outer circumference of the rehabilitation pipe, holds the rehabilitation pipe, and maintains the rehabilitation pipe in an appropriate cross-sectional shape. The connecting means provided on the arc plate connects the arc plates to each other with a space between the arc plates, so that each member integrally supports the rehabilitation tube as a rehabilitation tube support member. To be. By connecting multiple arc-shaped plates, it becomes possible to support the rehabilitation pipe stably even if the installation interval of the arc-shaped plates is increased, and when filling the backfill material between the existing pipe and the rehabilitation pipe In addition, the buoyancy acting on the rehabilitation pipe can also prevent the rehabilitation pipe from being deformed or rising. Moreover, the total number of arc-shaped plates required for the rehabilitation pipe can be reduced, and the construction cost can be suppressed. Furthermore, since the installation work of the support member can be performed easily over a long distance section in a short time, the work efficiency is good and the construction period can be shortened.

  Specific examples of the support member for the rehabilitation pipe include the following.

  First, as the connecting means, connecting members extending in the axial direction are provided on the left and right outer surfaces of the arc-shaped plate, and each connecting member is provided with a structure that can be connected to a connecting member provided on another arc-shaped plate. preferable.

  Thereby, the several arc-shaped board for supporting a rehabilitation pipe | tube can be connected by the connection member extended in an axial direction, and it can arrange | position in an existing pipe | tube, providing mutual space | interval.

  Further, as the connecting means, an engaging projection is provided on the left and right outer surfaces of the arc-shaped plate, and the connecting member is provided with a connecting member that is connected to the engaging protruding portion at the end in the axial direction. In addition, a plurality of connecting members may be arranged in the axial direction.

  Also by this, the some arcuate board for supporting a rehabilitation pipe | tube can be connected by the connection member extended in an axial direction, and it can arrange | position in an existing pipe | tube at intervals.

  In this case, it is preferable that the length in the axial direction of the protrusion for engagement is longer than the length in the axial direction of the arcuate plate, and the engagement portions that protrude in the axial direction from the arcuate plate are provided at both ends. .

  In addition, the length of the engaging protrusion in the axial direction may be shorter than the length of the arc-shaped plate in the axial direction, and the connecting member may be disposed so as to straddle the plurality of arc-shaped plates.

  In any configuration, by connecting the connecting portion of the connecting member to the engaging protrusion, the plurality of arc-shaped plates can be integrally arranged with an interval in the axial direction.

  Further, it is preferable that the connecting member is configured to be connected to the engaging protrusion in an interference fit state.

  Thereby, the operation | work which connects a connection member and the protrusion part for engagement can be performed easily, an operation | work effort is reduced, and it becomes possible to construct in a short period of time.

  Moreover, it is good also as a structure which equips the said connection member and the protrusion part for engagement with the bolt hole which mutually overlaps, and bolts the connection member and the protrusion part for engagement.

  Alternatively, the connecting member is provided with a connecting portion having a substantially rectangular tube shape, a substantially cylindrical shape, or a groove shape, and is inserted into the engaging projection portion in the axial direction to connect the connecting member and the engaging projection portion. You may comprise.

  Even with such a configuration, it is possible to easily perform the operation of connecting the connecting member and the engaging protruding portion, reducing the labor of the operation, and performing the work in a short period of time.

  Moreover, the structure which arrange | positions an arc-shaped board along the pipe line bending part of an existing pipe may be sufficient as the said some connecting member including what differs in the length of an axial direction. Furthermore, the connecting member may be elastic and bendable along the bend of the existing pipe.

  Thereby, it becomes easy to arrange | position a supporting member along the pipe line bending part of an existing pipe, and it can apply with respect to various pipe lines.

  Further, the engaging protrusion includes a convex portion protruding outward in the radial direction and contacting the inner surface of the existing pipe, and a concave portion recessed inward in the radial direction from the convex portion. The convex part maintains the distance between the outer surface of the rehabilitated pipe and the inner surface of the existing pipe, and the concave part forms a gap for the distribution of the backfill material between the outer surface of the rehabilitated pipe and the inner surface of the existing pipe. It is preferable to do.

  Furthermore, the connecting member is provided with a convex portion protruding outward in the radial direction and contacting the inner surface of the existing pipe, and a concave portion recessed inward in the radial direction from the convex portion. The concave part keeps the space between the outer surface of the rehabilitated pipe and the inner surface of the existing pipe, and the concave part forms a gap for the distribution of the backfill material between the outer surface of the rehabilitated pipe and the inner surface of the existing pipe. Is preferred.

  With such a configuration, the rehabilitated pipe is supported by the existing pipe via the convex portion that contacts the inner surface of the existing pipe, and is stably fixed without deformation. In addition, gaps are formed between these concave portions and the inner surface of the existing pipe, and a flow path for the injected backfilling material is obtained, so that the filling property of the backfilling material is ensured. Further, the cured backfilling material is not divided by the protrusions or the connecting members between the rehabilitated pipe and the existing pipe, and it is possible to ensure the integrity and continuity.

  According to the support member of the rehabilitation pipe according to the present invention, the rehabilitation pipe can be prevented from rising or deforming due to the buoyancy acting on the rehabilitation pipe, and the rehabilitation work can be performed while maintaining an appropriate cross-sectional shape. it can. In addition, the support member can be installed in a short time by an extremely simple operation, does not require a removal operation, and can greatly shorten the construction period.

The support member of the rehabilitation pipe | tube which concerns on Embodiment 1 of this invention is shown, Fig.1 (a) is a perspective view of a support member, FIG.1 (b) is a front view. It is sectional drawing seen from the front direction of the rehabilitation pipe | tube which shows a mode that a rehabilitation pipe | tube is supported by the said supporting member. It is a perspective view which shows the connection state of the said supporting member. It is explanatory drawing which shows the mode of a connection of a connection member. It is explanatory drawing which shows the rehabilitation method of the existing pipe | tube using the said supporting member. It is explanatory drawing which shows the support state of the rehabilitation pipe | tube by the said support member seeing from the upper direction of a support member. It is sectional drawing which shows the state after the renovation of an existing pipe. It is a perspective view which shows the example of the connection member in the said supporting member. FIG. 9A is a side view of a support member, and FIG. 9B is a side view showing a connected state, schematically showing a rehabilitation pipe support member according to Embodiment 2 of the present invention. FIG. 10A is a side view of a support member, and FIG. 10B is a side view showing a connected state, schematically showing a rehabilitation pipe support member according to Embodiment 3 of the present invention. The modification of the support member of the rehabilitation pipe | tube which concerns on Embodiment 3 of this invention is shown typically, Fig.11 (a) is a side view of a support member, FIG.11 (b) is a side view which shows a connection state. It is a perspective view which shows the supporting member which concerns on Embodiment 4 of this invention. It is a top view which shows the modification of Embodiment 4, and shows the arrangement | positioning form of a supporting member typically. It is a top view which shows the modification of Embodiment 4, and shows the other arrangement | positioning form of a supporting member typically. It is sectional drawing which shows the arrangement | positioning form of the supporting member which concerns on other embodiment. It is a front view which shows an example of the pipe making machine which forms a rehabilitation pipe | tube. It is a front view which shows an example of the support work apparatus used in the rehabilitation method of the conventional existing pipe.

  Hereinafter, a support member for a rehabilitation pipe according to an embodiment of the present invention will be described with reference to the drawings.

(Embodiment 1)
1A and 1B show a main body 2 of a support member 1 according to Embodiment 1, FIG. 1A is a perspective view, and FIG. 1B is a front view. FIG. 2 is a front view showing the usage state of the support member 1. FIG. 3 is a perspective view showing the connection between the main body portions 2 of the support member 1. FIG. 4 is an explanatory view showing a state of connection of the connecting member 7 in the support member 1.

  The support member 1 is a member that supports the rehabilitation pipe 102 provided in the existing pipe 101 when filling the backfill material between the inner surface of the existing pipe 101 and the outer surface of the rehabilitation pipe 102. The support member 1 includes a main body 2 and a plurality of connecting members 7 that connect the main body 2.

  As shown in FIG. 1A and FIG. 1B, the main body 2 has an arc plate 3 and a plurality of protrusions 4 erected on the outer surface of the arc plate 3. The arcuate plate 3 is formed in a substantially semicircular cross section having a larger curvature than the inner surface of the existing pipe 101, and has an inner diameter corresponding to the outer diameter of the rehabilitated pipe 102 when attached to the existing pipe 101. Further, the arc-shaped plate 3 is formed of a steel plate or the like having a circumferential length that is equal to or greater than a half circumference of the outer circumferential length of the rehabilitated pipe 102. The length (plate width) in the axial direction of the arc-shaped plate 3 can be formed to be equal to the member width of the band-shaped member constituting the rehabilitation pipe 102 or up to about twice the width of the band-shaped member.

  A plurality of protrusions 4 are provided on the outer surface of the arcuate plate 3 so as to protrude along the axial direction. As the protrusions 4, radial ribs 5 are provided obliquely above the top of the arc-shaped plate 3. These radial ribs 5 are made of steel or the like, and are erected radially with respect to the axis of the rehabilitation pipe 102. The height of the radial ribs 5 is set based on the inner diameter of the existing pipe 101 and the outer diameter of the rehabilitated pipe 102 or the arrangement position with respect to the arcuate plate 3. In the illustrated embodiment, the height of the radial rib 5 is highest at the top of the arc-shaped plate 3, and is formed such that the left and right ends of the arc-shaped plate 3 become shorter. In these radial ribs 5, the edge portions that contact the inner surface of the existing pipe 101 are formed so that the cross-sectional shape is a substantially semicircular shape.

  As the plurality of protrusions 4 on the outer surface of the arc-shaped plate 3, a pair of connecting ribs (engaging protrusions) 6 are provided at least on the right side and the left side when viewed from the axial direction. As shown in FIG. 1 (b), the connecting ribs 6 are provided at both ends in the circumferential direction of the arc-shaped plate 3, and are arranged symmetrically so as to face each other. The plurality of projections 4 including the radial ribs 5 and the connecting ribs 6 are equally arranged on the outer surface of the arc-shaped plate 3.

  The pair of connecting ribs 6 is formed to extend from the length of the arc-shaped plate 3 in the axial direction. As shown in FIG. 1B, the connecting rib 6 has a groove-shaped cross-sectional shape that opens outward (side) in the radial direction. More specifically, as shown in FIG. 4A, the connecting rib 6 is formed by bending a steel plate into a U-shaped cross section and including an upper surface plate 61, a side surface plate 62, and a lower surface plate 63. .

  Engaging portions 64 are respectively provided at both ends of the connecting rib 6. The engaging portion 64 is formed as a protruding portion that protrudes in the axial direction from the edge portion of the arc-shaped plate 3.

  For example, the arc-shaped plate 3 is formed with an axial length of 100 to 200 mm, and has a length of 140 mm in the illustrated embodiment. On the other hand, the pair of connecting ribs 6 has an axial length of 200 mm. The protruding length of the engaging portion 64 is preferably several tens of mm. For example, the engaging portion 64 is formed so as to protrude 30 mm from both ends of the arc-shaped plate 3 having an axial length of 140 mm.

  Further, the connecting rib 6 has a convex portion 65 that protrudes outward in the radial direction and contacts the inner surface of the existing pipe 101, and a concave portion 66 that is recessed inward in the radial direction from the convex portion 65. doing. In the form shown in FIG. 1 (a), the concave portion 66 has a shape in which the upper surface plate 61 and the lower surface plate 63 of the connecting rib 6 are notched in a curved shape and gently recessed inward in the radial direction. Have. In addition, the concave portions 66 are provided at two locations across the central portion of the connecting rib 6 in the axial direction. A central portion in the axial direction of the remaining connecting rib 6 protrudes outward from the concave portion 66, and is a convex portion 65 formed with a protruding amount equivalent to the engaging portion 64. The engaging portion 64 and the central convex portion 65 are formed so that the outer edge portions of the upper surface plate 61 and the lower surface plate 63 are flush with each other.

  As shown in FIG. 2, the main body 2 of the support member 1 is configured such that the arc-shaped plate 3 is fixed to the upper half of the existing pipe 101 and holds the upper half of the rehabilitated pipe 102. The arcuate plate 3 is supported on the inner surface of the existing pipe 101 through the plurality of protrusions 4 (5, 6). In particular, the pair of connecting ribs 6 are pressed against the inner surface of the existing pipe 101 to support the arc-shaped plate 3 on the inner surface of the existing pipe 101. As a result, the main body 2 supports the rehabilitated tube 102 while keeping the distance between the inner surface of the existing tube 101 and the outer surface of the rehabilitated tube 102 constant.

  Further, in the connecting rib 6, the engaging portions 64 at both ends and the convex portion 65 at the central portion are aligned at the outer edge in the radial direction, and both abut against the inner surface of the existing pipe 101. On the other hand, the concave portion 66 does not contact the inner surface of the existing pipe 101 and forms a gap with the inner surface of the existing pipe 101.

  When the existing pipe 101 is rehabilitated, a plurality of main body portions 2 are disposed in the existing pipe 101 at intervals in the axial direction. The main body 2 may be continuously arranged in the axial direction in the existing pipe 101 without a gap, but a large number of main bodies 2 are required, which is costly and labor-intensive, and the shape of the pipe line It becomes difficult to cope with. Moreover, when arrange | positioning the some main-body part 2 with a space | interval, in order to support the rehabilitation pipe | tube 102, it is also considered to arrange | position those spaces as close as possible. However, even in that case, there is a problem that the number of the main body units 2 is large, and it takes time and cost. Therefore, in the present invention, the length of the arc-shaped plate 3 itself in the axial direction is shortened to suppress the manufacturing cost of the main body part 2 and the installation interval between the main body parts 2 is increased, so that the main body parts 2 are connected to each other by the connecting member 7. By connecting, the above problems are solved.

  As shown in FIG. 3, the connecting member 7 in the support member 1 is a rod-like member having a certain length, and connecting portions 74 that can be attached to the engaging portions 64 of the connecting rib 6 are provided at both ends. I have. Each of the connecting rib 6 and the connecting member 7 of the main body 2 is made of a single member.

  In the illustrated embodiment, the connecting member 7 has a groove-shaped cross-sectional shape opened to one side, and is formed of a steel material. More specifically, as shown in FIG. 4A, the connecting member 7 is formed by bending a steel plate into a U-shaped cross section and including an upper surface plate 71, a side surface plate 72, and a lower surface plate 73. .

  The connecting member 7 includes a convex portion 75 that protrudes outward in the radial direction and contacts the inner surface of the existing pipe 101, and a concave portion 76 that is recessed inward in the radial direction from the convex portion 75. As shown in FIG. 3, the concave portion 76 has a shape in which the upper surface plate 71 and the lower surface plate 73 of the connecting member 7 are notched in a curved shape and are gradually recessed inward in the radial direction. . The concave portions 76 are provided at two locations across the central portion of the connecting member 7 in the axial direction. A central portion in the axial direction of the remaining connecting member 7 is a convex portion 75 that protrudes outward from the concave portion 76. The outer edge portions of the upper surface plate 71 and the lower surface plate 73 in the convex portion 75 are formed so as to be flush with each other.

  At both ends of the connecting member 7, connecting portions 74 connected to the connecting rib 6 of the main body 2 are provided. The connecting portion 74 is formed to be connected to the engaging portion 64 of the connecting rib 6 by an interference fit. As shown in FIG. 4A, the connecting portion 74 has a groove-shaped cross-sectional inner width dimension (L1) slightly smaller than the outer width dimension (L2) of the engaging portion 64 of the connecting rib 6. Is formed.

  Further, the upper surface plate 71 of the connecting member 7 is provided with an inclined surface on the inner surface side so as to be slightly thinned toward the end edge portion. In the illustrated embodiment, the inner width dimension (L1) of the connecting portion 74 is 14.9 mm, whereas the inner width dimension (L3) of the end edge portion of the connecting portion 74 is 15.2 mm. Further, the outer width dimension (L2) of the engaging portion 64 of the connecting rib 6 is 15 mm. The thicknesses of the connecting member 7 and the connecting rib 6 are both 2.3 mm.

  Thereby, the connection part 74 of the connection member 7 is comprised so that it can be easily engage | inserted from the inner surface side of the existing pipe 101 with respect to the engagement part 64 of the rib 6 for connection. As shown in FIG. 4B, the coupling portion 74 of the coupling member 7 fitted is coupled to the engagement portion 64 of the coupling rib 6 in an interference fit state.

  In such a connecting member 7, the connecting portion 74 at both ends and the convex portion 75 at the center are both flush with the outer peripheral edge in the radial direction and connected to the connecting rib 6. It comes into contact with the inner surface. The convex portion 75 keeps a space between the outer surface of the rehabilitated tube 102 and the inner surface of the existing tube 101, and the concave portion 76 does not contact the inner surface of the existing tube 101, and a gap is formed between the inner surface of the existing tube 101. Form. Further, the side plate 72 of the connecting member 7 contacts the outer surface of the rehabilitated tube 102.

  In this embodiment, the left and right connecting ribs 6 provided on the outer surface of the arcuate plate 3 and the plurality of connecting members 7 serve as connecting means for connecting the arcuate plates 3 to each other. Such connecting means is disposed in the axial direction along the outer surface of the arc-shaped plate 3 and the outer surface of the rehabilitated tube 102 and supports the rehabilitated tube 102 together with the arc-shaped plate 3, and the plurality of arc-shaped plates 3 are mutually connected by the connecting means. Are arranged at intervals in the tube axis direction of the existing tube 101.

  Next, a rehabilitation method for rehabilitating the existing pipe 101 using the support member 1 will be described. FIG. 5 is an explanatory view showing a method for rehabilitating the existing pipe 101 using the support member 1, and FIG. 6 is an explanatory view showing the support state of the rehabilitation pipe 102 by the support member 1 as viewed from above the support member 1. is there. In FIG. 6, in order to make the drawing easier to see, the existing pipe 101 is shown with cross-sectional hatching, and the line of the strip-like member 103 that appears on the outer peripheral surface of the rehabilitation pipe 102 is omitted.

  The rehabilitation pipe 102 is formed in the existing pipe 101 by using a pipe making machine 105 as illustrated in FIG. The pipe making machine 105 includes a plurality of link bodies 106 connected to each other, one roller 107 for joining the side edges of the band-shaped member 103, and the band-shaped member 103 facing the roller 107 from the inner peripheral side. And a pinch roller 108 to be supplied. The long belt-like member 103 is spirally wound by the pipe making machine 105. In the process, the side edge of the belt member 103 that follows the side edge of the belt member 103 is guided from the inner peripheral side, and the joint of the belt member 103 that follows the joint of the belt member 103 is preceded. Are fitted from the inner surface side, and the belt-like member 103 is sequentially tubular.

  A metal reinforcing material is continuously attached to the belt-like member 103 along the longitudinal direction. For example, the reinforcing material is formed by bending a strip-shaped steel plate into a substantially W-shaped cross section, and is fitted between the ribs of the strip-shaped member 103. Thereby, the strength and rigidity of the rehabilitation pipe 102 to be formed are increased.

  As a method for rehabilitating the existing pipe 101, first, the support member 1 is installed in the existing pipe 101. That is, the main body 2 of the support member 1 is installed at a set interval in the pipe axis direction of the existing pipe 101. The main body 2 can be easily installed by centering the existing pipe 101 using a leveling device or the like, and pressing the main body 2 in the top direction inside the existing pipe 101 against a pre-marked marking. Can finish. Although the installation interval of the main body 2 depends on the diameter of the rehabilitated tube 102, for example, the axial interval between the arcuate plates 3 of the support member 1 can be set to approximately 500 to 1000 mm. Since the length of the arcuate plate 3 in the axial direction is 100 to 200 mm as described above, the number of arcuate plates 3 installed per 1 m of the pipe line can be 1 or less.

  The main body portions 2 can be connected to each other using two connecting members 7 as shown in FIG. That is, the connecting member 7 is coupled to the connecting portion 74 of the connecting rib 6 of the main body 2, and the plurality of arc-shaped plates 3 arranged at intervals in the axial direction are connected to each other. The connecting operation is easy to fit the engaging part 64 of the connecting rib 6 and the connecting part 74 of the connecting member 7 from the inside of the existing pipe 101 to the two main body parts 2 installed in the existing pipe 101. It only takes a lot of work. By simply fitting the connecting portion 74 of the connecting member 7 into the connecting rib 6, both are connected in an interference fit state.

  Thereby, the plurality of main body portions 2 can be arranged at predetermined intervals along the tube axis direction of the existing tube 101. Moreover, the operation | work required for installation of the supporting member 1 is very easy, there are few work processes, and it can install in the whole object pipe line in a short time.

  Next, the pipe making machine 105 is assembled in the existing pipe 101. The belt-like member 103 is drawn into the existing pipe 101 and supplied to the pipe making machine 105 to drive the pipe making machine 105. The pipe making machine 105 revolves around the axis of the existing pipe 101 and winds the belt-like member 103 spirally. Thereby, the joining part of the adjacent strip | belt-shaped member 103 is mutually joined, and the rehabilitation pipe | tube 102 is formed, making the arc-shaped board 3 of the supporting member 1 inscribed. Further, the subsequent strip member 103 is sequentially supplied to the top of the rehabilitation pipe 102, and the rehabilitation pipe 102 is additionally formed.

  As shown in FIG. 5, the rehabilitation pipe 102 formed by the pipe making machine 105 is arranged as it is without rotating in the existing pipe 101. The support member 1 does not generate frictional resistance with the outer surface of the rehabilitation pipe 102, and does not shift or move. The arcuate plate 3 is fixed in the existing pipe 101 and is stably disposed in the upper half of the rehabilitated pipe 102. The rehabilitating tube 102 is formed while the upper half is inscribed in the arc-shaped plate 3 and is held by the main body 2 and the connecting member 7 from the outside.

  The arcuate plate 3 is in contact with the upper half of the rehabilitated tube 102 and abuts on the outer surface over a half of the circumference of the rehabilitated tube 102. The connecting member 7 not only connects the main body portions 2 to each other but also supports the rehabilitating tube 102 by the side plate 72 coming into contact with the outer surface of the rehabilitating tube 102. The rehabilitating tube 102 is fixed by holding the left and right side portions in the axial direction on the arcuate plate 3 or the connecting member 7. Since the connecting member 7 is disposed on both the left and right sides in the axial direction, the outer surface of the rehabilitated tube 102 is held from both the left and right sides in the axial direction even in a range where the rehabilitated tube 102 does not contact the arcuate plate 3.

  The rehabilitation pipe 102 is supported in the existing pipe 101 via the main body 2 and the connecting member 7, keeps the distance from the inner surface of the existing pipe 101 constant, and maintains an appropriate cross-sectional shape to prevent deformation. .

  Further, as shown in FIG. 6, when viewed from above the rehabilitation pipe 102, the convex portion 65 of the connecting rib 6 and the convex portion 75 of the connecting member 7 are formed on the left and right sides in the axial direction of the existing pipe 101. The rehabilitation tube 102 is supported in contact with the inner surface. In the pair of connecting ribs 6 disposed on the left and right sides of the rehabilitated pipe 102, the connecting parts 74 of the connecting member 7 are in contact with the inner surface of the existing pipe 101 in a state of being tightly fitted to the engaging parts 64 at both ends. . The concave portion 66 of the connecting rib 6 does not contact the inner surface of the existing tube 101 and forms a gap with the inner surface of the existing tube 101. The concave portion 76 of the connecting member 7 does not contact the inner surface of the existing pipe 101 and forms a gap with the inner surface of the existing pipe 101.

  If the rehabilitation pipe 102 is formed over the entire length of the rehabilitation section of the existing pipe 101, both ends of the rehabilitation section of the existing pipe 101 are closed. Thereafter, a backfilling material 104 such as mortar is injected and filled into the gap between the inner surface of the existing tube 101 and the outer surface of the rehabilitated tube 102. As shown in FIG. 7, when the backfill material 104 is cured, the existing pipe 101 and the renovated pipe 102 are integrated, and the existing pipe 101 can be rehabilitated.

  When the backfill material 104 is injected, it is injected in a stepwise manner from above the rehabilitation pipe 102 into the gap between the existing pipe 101 and flows downwardly into the rehabilitation pipe 102 to be filled in order. As shown in FIG. 6, the concave portions 66 of the left and right connecting ribs 6 and the concave portions 76 of the connecting member 7 are not in contact with the inner surface of the existing tube 101 and are not spaced from the inner surface of the existing tube 101. Is forming. For this reason, the injected backfill material 104 flows downward through these gaps, and fluidity and filling properties are not hindered.

  By injecting the backfill material 104, buoyancy acts on the rehabilitated pipe 102, and the rehabilitated pipe 102 attempts to rise in the existing pipe 101. However, the rehabilitation pipe 102 is supported by the existing pipe 101 by the support member 1. For this reason, the rehabilitation pipe | tube 102 does not float, but maintains the gap | interval with the existing pipe | tube 101 as it is before injection | pouring of the backfill material 104, and is constant.

  Further, the rehabilitation pipe 102 is held so as to be sandwiched by the arc-shaped plate 3 from above, and the right and left sides in the axial direction are held by the connecting member 7. For this reason, the backfill material 104 is injected stepwise from below, and even if buoyancy acts on the rehabilitation pipe 102, it is fixed without being lifted in the existing pipe 101. Further, the rehabilitating pipe 102 is supported by the main body part 2 or the connecting member 7 while maintaining an appropriate distance between the left and right side parts in the axial direction over the entire length with the existing pipe 101.

  Moreover, the rehabilitating tube 102 is in contact with the arc-shaped plate 3 of the support member 1 over about a half circumference on the upper side of the outer periphery, and this arc-shaped plate 3 is connected to the upper half of the existing tube 101 via the plurality of protrusions 4. It is supported. The arcuate plate 3 is disposed so as to sandwich the left and right outer surfaces of the rehabilitated tube 102 when the rehabilitated tube 102 is viewed from the tube axis direction.

  Accordingly, as shown in FIG. 7, the backfill material 104 can be injected and filled in a state in which the rehabilitation pipe 102 is maintained in an appropriate shape without being deformed in a perfect circular shape.

  After the backfill material 104 is cured, the support member 1 does not need to be removed and is embedded in the existing pipe 101 as it is. The backfilling material 104 is cured while the support member 1 stably supports the rehabilitation tube 102. The support member 1 is integrated with the upper half of the rehabilitation pipe 102. Since the arc-shaped plate 3 and the connecting member 7 of the support member 1 are integrally fixed to the outer surface of the rehabilitation pipe 102, the rigidity of the rehabilitation pipe 102 can be increased and a conduit having sufficient strength can be formed. it can.

  Moreover, in the rehabilitation pipe | tube 102 integrated with the existing pipe | tube 101, since the quality of a cross-sectional shape can be raised, the intensity | strength as the rehabilitation pipe | tube 102 is fully ensured, it is rich in durability, and drainage capacity is improved. Can be made.

  When the existing pipe 101 is rehabilitated, there is no obstacle inside the rehabilitation pipe 102 as in the conventional support device (see FIG. 17). Therefore, the water level in the existing pipe 101 does not rise, and construction restrictions can be reduced. When a sudden rise in the water level is expected, a passage free of obstacles is secured in the existing pipe 101, so that the operator can quickly evacuate from the existing pipe 101.

  The support member 1 does not require time-consuming work such as driving anchor bolts or the like into the existing pipe 101. Therefore, the support member 1 can be fixed very easily and stably. The inner surface of the existing pipe 101 is damaged by corrosion or the like, or the thickness is reduced. However, the supporting member 1 should be installed with good workability on any inner surface of the existing pipe 101. Can do.

  As the support member 1 of the rehabilitation pipe 102, the connecting member 7 can be configured in various forms other than the form shown in FIG. FIG. 8 is a perspective view showing an example of the connecting member 7.

  For example, as shown in FIG. 8A, a bolt hole 741 that penetrates the upper surface plate 71 and the lower surface plate 73 may be provided in the connection portion 74 of the connection member 7. Similarly, the engaging portion 64 of the connecting rib 6 is also provided with a bolt hole, and the connecting portion 74 and the engaging portion 64 are provided with overlapping bolt holes. Thereby, the connecting portion 74 of the connecting member 7 and the engaging portion 64 of the connecting rib 6 can be connected by bolts, and the main body portions 2 can be connected to each other.

  Moreover, as shown in FIG.8 (b), you may form the connection part 74 of the connection member 7 in a substantially rectangular tube shape. In this case, the connecting portion 74 is formed so as to correspond to the outer shape of the engaging portion 64 of the connecting rib 6, and is inserted into the engaging portion 64 in the axial direction to be externally fitted. Thereby, the main body portions 2 can be connected to each other by the connecting member 7.

  In the example shown in FIG. 8C and FIG. 8D, the connecting portion 74 of the connecting member 7 has a cross-sectional groove shape, and the point of being tightly fitted to the engaging portion 64 is the form shown in FIG. It is the same. However, these connecting members 7 are configured by only the side plate 72 without the upper surface plate 71 and the lower surface plate 73 in the concave portion 76. In the connecting member 7 shown in FIG. 8C, the convex portion 75 has a groove-shaped cross-sectional shape similar to the connecting portions 74 at both ends. In the connecting member 7 shown in FIG. 8D, a substantially cylindrical protrusion is provided on the side plate 72 as the convex portion 75. Similarly to the above-described embodiment, the convex portion 75 is formed so that the connecting portions 74 and the outer edge portions of both ends are flush with each other, abuts on the inner surface of the existing pipe 101, and the outer surface of the renovated pipe 102 and the existing pipe It acts to keep the distance between the inner surfaces of 101.

  Also with the connecting member 7 according to such various forms, the plurality of main body portions 2 can be connected to each other, and the connecting member 7 can be disposed in contact with both the rehabilitated pipe 102 and the existing pipe 101. Therefore, the strength of the rehabilitated tube 102 can be improved uniformly in the tube axis direction, and as a result, the installation interval of the main body 2 can be increased.

  As described above, by rehabilitating the existing pipe 101 using the support member 1 of the rehabilitated pipe 102, the construction period can be significantly shortened as compared with the conventional rehabilitation method. Since the support member 1 can be installed on the existing pipe 101 by an extremely simple operation, it can be installed in a short period of time before the renovated pipe 102 is manufactured. Moreover, since the rehabilitation pipe | tube 102 is stably hold | maintained by the supporting member 1 at the time of injection | pouring of the backfilling material 104, an injection | pouring and filling operation | work can be completed in a short period of time without an effort. After the backfill material 104 is cured, an operation such as removing the support member 1 is unnecessary, and the finishing operation can be started as it is. Since the number of work steps is thus greatly reduced, the number of workers can be reduced.

  On the other hand, in the conventional method, after the rehabilitation pipe 102 is manufactured, a plurality of support devices must be installed, which requires labor and time. At the time of injection of the backfill material 104 after that, since a support device exists in the rehabilitation pipe 102, it was necessary to proceed with the work while preventing the speeding up of the work and paying attention to the deformation and floating of the rehabilitation pipe 102. After the backing material 104 is cured, in addition to the removal work of the support device 110 as shown in FIG. 13, a work for closing the extraction trace of the support material 111 is also required, which takes time and effort.

  The support member 1 of the rehabilitation pipe 102 according to the present embodiment eliminates the need for the work in the rehabilitation work, significantly reduces the time required for each work process for rehabilitation of the existing pipe 101, and greatly shortens the work period. can do. Further, since the plurality of main body portions 2 connected to the connecting member 7 are evenly arranged along the axial direction, the rehabilitation pipe 102 bulges between the adjacent support members 1 even when the backfill material 104 is injected. Or deformation.

  Further, since the support member 1 is disposed so as to hold the rehabilitation pipe 102 including the left and right outer surfaces over the entire length of the rehabilitation pipe 102 when viewed from the tube axis direction, and the arcuate plate 3 sandwiches the rehabilitation pipe 102, the rehabilitation pipe It is possible to effectively prevent the rehabilitation tube 102 from rising or deforming due to the buoyancy acting on the tube 102, and to maintain an appropriate cross-sectional shape. The pipeline after rehabilitation can be provided with sufficient strength and drainage capacity.

(Embodiment 2)
The support member 1 of the rehabilitation pipe 102 according to the present invention can be configured as follows. FIG. 9 schematically shows the support member 1 according to the second embodiment. FIG. 9A is a side view of the support member 1, and FIG. 9B is a side view showing a connected state of the support member 1. is there.

  In addition, the support member 1 which concerns on Embodiment 2 and 3 shown below differs from the said Embodiment 1 in the structure of a connection means, About the structure of the arc-shaped board 3, the radial rib 5, etc., is common. Therefore, in the following description, the structure of a connection means is explained in full detail, and about the other structure which is common in Embodiment 1, the overlapping description is abbreviate | omitted using a common code | symbol.

  The support member 1 shown in FIG. 9A is provided with rod-like connecting members 8 extending in the axial direction on the left and right outer surfaces of the arc-shaped plate 3 of the main body 2 as connecting means. The connecting members 8 are provided on the right and left sides of the arc-shaped plate 3 when viewed from the axial direction, at both ends in the circumferential direction of the arc-shaped plate 3, and are arranged symmetrically so as to face each other. One end of the connecting member 8 is integrally attached to the outer surface of the arc-shaped plate 3, and the other end is a free end extending in the axial direction of the arc-shaped plate 3. The structure of the connecting member 8 itself can be the same as that of the connecting member 7 according to the embodiment shown in FIGS. 3 and 8 in the first embodiment, and is formed to have a convex part 75 and a concave part 76. The The connecting member 8 has a structure in which one end and the other end can be connected to each other, and can be connected to the connecting member 8 provided on the other arc-shaped plate 3.

  As shown in FIG. 9B, the main body portions 2 can be connected to each other by using two connecting members 8 extending on the left and right outer surfaces of the arc-shaped plate 3. That is, the other end portion of the connecting member 8 is coupled to one end portion of the connecting member 8 of the other main body portion 2 to connect the plurality of arcuate plates 3 to each other. The arcuate plates 3 are arranged in the axial direction with a space between each other. In the connecting operation, for example, the connecting members 8 are connected to each other while the other arc-shaped plate 3 is moved in the axial direction with respect to the arc-shaped plate 3 installed in the existing pipe 101.

  The connecting members 8 are connected with one end and the other end being in an interference fit, or provided with a connecting portion having a substantially rectangular tube shape, a substantially cylindrical shape, or a groove shape, and the one end portion and the other end portion are provided. It is inserted and connected in the axial direction. The connected connecting member 8 can have the function of the protrusion 4 that keeps the distance between the inner surface of the existing tube 101 and the outer surface of the rehabilitated tube 102 together with the radial rib 5 on the outer surface of the arc-shaped plate 3. The connecting member 8 is in contact with the existing pipe 101 and supports the rehabilitated pipe 102.

  Thereby, the several arc-shaped board 3 can be arrange | positioned at predetermined intervals along the pipe-axis direction of the existing pipe | tube 101. FIG. Moreover, the operation | work required for installation of the supporting member 1 is very easy, there are few work processes, and it can install in the whole object pipe line in a short time.

(Embodiment 3)
FIG. 10 schematically shows the support member 1 according to the third embodiment. FIG. 10A is a side view of the support member 1 and FIG. 10B is a side view showing a connected state of the support member 1. . 11 shows a modified example of the support member 1 according to the third embodiment. FIG. 11 (a) is a side view of the support member 1, and FIG. 11 (b) is a side view showing a connected state of the support member 1. .

  The support member 1 shown in FIG. 10A is provided with engaging protrusions 9 on the left and right outer surfaces of the arcuate plate 3 as connecting means for the arcuate plate 3 and connecting portions connected to the engaging protrusions 9. It has the connection member 8 with which the edge part of the axial direction was equipped. Unlike the connecting rib 6 of the first embodiment, the engaging protrusion 9 is formed shorter than the length of the arc-shaped plate 3 in the axial direction, and is disposed at a substantially central portion in the width direction of the arc-shaped plate 3.

  The connecting member 8 is a rod-like member having a certain length, and is provided with connecting portions (for example, similar to the connecting portion 74) that can be attached to the engaging projections 9 at both ends. As shown in FIG. 10B, the connecting member 8 is connected to the engaging protrusion 9 on the outer surface of the arc-shaped plate 3 and is disposed so as to straddle the plurality of arc-shaped plates 3. Also in this case, the connecting member 8 can be the same as that shown in FIGS. 3 and 8 in the first embodiment, and preferably has a convex portion 75 and a concave portion 76. The engaging protrusion 9 may also be provided with a convex portion 65 and a concave portion 76.

  The connecting member 8 connected to the engaging projection 9 acts on the outer surface of the arc-shaped plate 3 together with the radial ribs 5 so as to keep a space between the inner surface of the existing tube 101 and the outer surface of the rehabilitated tube 102. Further, the connecting member 8 supports the rehabilitated tube 102 in contact with the existing tube 101.

  Thus, in the form shown in FIGS. 10A and 10B, the connecting member 8 is configured to also serve as the protruding portion 4 of the arcuate plate 3 like the radial rib 5. On the other hand, the support member 1 shown in FIG. 11A is provided with a plurality of protrusions 4 along the axial direction at both ends in the circumferential direction of the arc-shaped plate 3 as a plurality of protrusions 4 on the outer surface of the arc-shaped plate 3. It has been. In addition to these protrusions 4, an engagement protrusion 9 is further provided on the outer surface of the arc-shaped plate 3. The engaging protrusions 9 are arranged symmetrically on the left and right outer surfaces of the arcuate plate 3 when viewed from the axial direction. Further, the engaging protrusion 9 is formed shorter than the length of the arc-shaped plate 3 in the axial direction, and is disposed at a substantially central portion of the arc-shaped plate 3 in the width direction.

  The connecting member 8 includes connecting portions (for example, the same as the connecting portion 74) at both ends. As shown in FIG. 11 (b), by connecting the connecting member 8 to the engaging projection 9, the plurality of arcuate plates 3 can be connected in a state where they are spaced from each other. The connecting member 8 is disposed in the axial direction so as to straddle the plurality of arcuate plates 3.

  The connecting member 8 and the engaging protrusion 9 are connected in an interference-fitted state, or the connecting member 8 having a substantially rectangular tube shape, substantially cylindrical shape, or groove shape is connected to the engaging protrusion portion 9 as a shaft. It is connected by being inserted in the direction. The connecting member 8 is in contact with the existing pipe 101 and supports the rehabilitated pipe 102.

  Thereby, the several arc-shaped board 3 can be arrange | positioned at predetermined intervals along the pipe-axis direction of the existing pipe | tube 101. FIG. Moreover, the operation | work required for installation of the supporting member 1 is very easy, there are few work processes, and it can install in the whole object pipe line in a short time.

(Embodiment 4)
FIG. 12 is a perspective view showing the support member 1 according to the fourth embodiment. 13 and 14 show a modification of the fourth embodiment, FIG. 13 is a top view schematically showing the arrangement of the support member 1, and FIG. 14 shows another arrangement of the support member 1. As shown in FIG. It is a top view showing typically.

  The support member 1 according to the fourth embodiment is different from the first or third embodiment in the configuration of the protrusion 4 on the outer surface of the arc-shaped plate 3 of the main body 2 and the configuration of the connecting means, and the arc-shaped plate 3 itself. The configuration is the same. Therefore, in the following description, the characteristic configuration of the fourth embodiment will be described in detail, and the description of other configurations common to the above-described embodiment will be omitted by using common reference numerals.

  In the main body 2, the plurality of protrusions 4 erected on the outer surface of the arcuate plate 3 are all shorter than the length of the arcuate plate 3 in the axial direction (plate width). It is provided at a substantially central portion in the axial direction. Moreover, these protrusion parts 4 are equally arrange | positioned so that it may become a left-right symmetric shape seeing from an axial direction. In the example shown in FIG. 12, the projecting portion 4 includes a shaft portion 41 projecting outward on the outer surface of the arc-shaped plate 3, and a contact portion 42 attached to the shaft portion 41 and having an adjustable mounting position. With.

  The shaft portion 41 is a columnar protrusion, and a male screw (not shown) is provided on the outer peripheral surface. The length of the shaft portion 41 is set corresponding to the distance between the existing tube 101 and the rehabilitated tube 102, and the shaft portion 41 provided at the top of the arcuate plate 3 is the longest, and is provided on the left and right outer surfaces as viewed from the axial direction. The shaft portion 41 thus formed is the shortest.

  A nut is screwed onto the shaft portion 41 as a contact portion 42. Corresponding to the length of the shaft portion 41, the length of the contact portion 42 in the axial direction is also the longest that is disposed on the top of the arc-shaped plate 3, and the long nut is screwed in. The one arranged on the left and right outer surfaces is the shortest.

  Thereby, like the form shown in FIG. 7, the support member 1 in which the main body 2 is disposed between the rehabilitation pipe 102 and the existing pipe 101 maintains the cross-sectional shape of the rehabilitation pipe 102 in a perfect circle shape. To support the rehabilitation tube 102.

  Further, in the support member 1 according to the fourth embodiment, when the main body portion 2 is installed on the existing pipe 101, the arrangement position of the arc-shaped plate 3 can be adjusted by adjusting the axial length of the protruding portion 4. it can. That is, the contact portion 42 screwed to the shaft portion 41 is rotated to adjust the screwing position of the contact portion 42 with respect to the shaft portion 41. By fixing the abutting portion 42 so that the tip of the abutting portion 42 is pressed against the existing pipe 101, the arc-shaped plate 3 can be supported on the inner surface of the existing pipe 101, and the regenerated pipe 102, the existing pipe 101, A holding force can be applied between the two. For this reason, the main-body part 2 can be arrange | positioned in an appropriate position, and position shift etc. can be prevented.

  Among the plurality of protrusions 4, the protrusions 4 provided on the right side and the left side when viewed from the axial direction can be the protrusions 9 for engagement with the connection member 8 as connection means. In this case, as shown in FIG. 12, the connecting member 8 as the connecting means is formed of a band plate-like member having a predetermined length, and a plurality of cylindrical protrusions are provided on the outer surface 81 as convex portions 82. Yes. The outer surface 81 of the connecting member 8 acts as a concave portion 83 with respect to the convex portion 82. At both ends of the connecting member 8 in the axial direction, connecting portions 84 connected to the engaging protrusions 9 are provided. The connecting portion 84 is formed as a bowl-shaped notch that engages with the shaft portion 41 of the engaging projection 9.

  In the connecting member 8, when the connecting member 8 is connected to the engaging protrusion 9, the plurality of convex portions 82 come into contact with the inner surface of the existing pipe 101. The convex portion 82 keeps a space between the outer surface of the rehabilitated tube 102 and the inner surface of the existing tube 101, and the concave portion 83 (outer surface 81) does not contact the inner surface of the existing tube 101, and is in contact with the inner surface of the existing tube 101. A gap is formed between them to provide a flow path for filling the backfill material.

  When installing the support member 1, the arc-shaped plate 3 is disposed, and after adjusting the protruding amount of the protruding portion 4, the connecting member 8 is coupled to the engaging protruding portion 9 to connect the plurality of arc-shaped plates 3 to each other. . The connecting operation is only a simple operation for inserting and engaging the connecting portion 84 of the connecting member 8 into the shaft portion 41 of the protruding portion 4 from the inside of the existing tube 101 with respect to the arc-shaped plate 3 installed in the existing tube 101. Just do it.

  Thereby, the plurality of main body portions 2 can be arranged at predetermined intervals along the tube axis direction of the existing tube 101. Moreover, the operation | work required for installation of the supporting member 1 is very easy, there are few work processes, and it can install in the whole object pipe line in a short time.

  Here, as the plurality of connecting members 8, members having different lengths in the axial direction of the connecting members 8 arranged on the left and right as viewed from the axial direction may be used. As a result, the arc-shaped plates 3 of the main body 2 that are arranged with a space between each other can be disposed with the axis inclined toward the shorter length of the connecting member 8. As shown in FIG. 13, by using the connecting members 8 having different lengths, it is possible to dispose a plurality of main body portions 2 along the pipe bending portion of the existing pipe 101.

  Moreover, in addition to using the thing from which the length of an axial direction differs as the some connection member 8, you may use the connection member 8 which has elasticity and can be bent and deformed. For example, the connecting member 8 can be formed of a metal plate material such as elastic plate-shaped spring steel or aluminum plate material. The connecting member 8 may be formed of a plate material made of a synthetic resin material such as PE, PVC, or PC, or a plate material made of fiber reinforced resin reinforced with a fiber material such as carbon fiber or glass fiber. Thereby, as shown in FIG. 14, the plurality of main body portions 2 can be arranged along the pipeline bend portion of the existing pipe 101.

  Also with the support member 1 of the rehabilitated pipe 102 according to the present embodiment, the time required for each work process for rehabilitation of the existing pipe 101 can be remarkably shortened, and the construction period can be greatly shortened. It is possible to prevent the rehabilitation tube 102 from expanding and deforming even by the injection.

  Further, since the support member 1 is disposed so as to hold the rehabilitation pipe 102 including the left and right outer surfaces over the entire length of the rehabilitation pipe 102 when viewed from the tube axis direction, and the arcuate plate 3 sandwiches the rehabilitation pipe 102, the rehabilitation pipe It is possible to effectively prevent the rehabilitation tube 102 from rising or deforming due to the buoyancy acting on the tube 102, and to maintain an appropriate cross-sectional shape. The pipeline after rehabilitation can be provided with sufficient strength and drainage capacity.

(Other embodiments)
The present invention is not limited to the above embodiment, and is provided in the existing pipe 101 when the backfill material 104 is filled between the inner surface of the existing pipe 101 and the outer surface of the rehabilitated pipe 102, and the outer periphery of the rehabilitated pipe 102. As long as the arc-shaped plate 3 having a circumference longer than a half circumference is provided with a plurality of protrusions 4 that keep the distance between the inner surface of the existing pipe 101 and the outer surface of the rehabilitated pipe 102 and connected by the connecting member 8 It may be configured as follows. The protrusion 4 can be provided at various positions in consideration of the diameter of the rehabilitation pipe 102 and the like. The shape and size of the protrusions 4 are not limited to the above-described forms, and may be any shape such as a round pipe or a square pipe. Moreover, each part which comprises the supporting member 1 is not only formed with metal-type materials, such as a steel plate or an iron plate, but may be formed with the synthetic resin-type material provided with required intensity | strength.

  Furthermore, as shown in FIG. 15, the arcuate plate 3 of the support member 1 may be fixed to the lower side in the existing pipe 101 and used. By supporting the arc-shaped plate 3 on the bottom of the existing pipe 101, the rehabilitated pipe 102 can be disposed in contact with the top of the existing pipe 101. In this case, the buoyancy acting on the rehabilitation pipe 102 when filling the backfilling material is borne by the inner surface of the top of the existing pipe 101 in contact with the rehabilitation pipe 102 to prevent ascent and support the lower side of the rehabilitation pipe 102. The support member 1 prevents the rehabilitation tube 102 from being deformed. Furthermore, since the rehabilitated pipe 102 is supported in a state of floating from the bottom of the existing pipe 101, the height of the bottom of the rehabilitated pipe 102 can be set by adjusting the distance between the arc-shaped plate 3 and the existing pipe 101. It is also possible to correct the slope of the rehabilitation pipeline.

  In addition, the pipe making machine for forming the rehabilitation pipe is not limited to the pipe making machine 105 illustrated in FIG. Any pipe making machine may be used as long as the side edge of the band-like member 103 that follows the side edge is guided from the inner peripheral side and joined to each other. Therefore, the above-described embodiment is merely an example, and can be implemented in various other forms without departing from the main features.

  INDUSTRIAL APPLICABILITY The present invention can be suitably used for efficiently rehabilitating an aged existing pipe in a short period of time.

DESCRIPTION OF SYMBOLS 1 Support member 2 Main-body part 3 Arc-shaped board 4 Projection part 5 Radial rib 6 Connecting rib (engagement projection part)
61 upper surface plate 62 side surface plate 63 lower surface plate 64 engagement portion 65 convex portion 66 concave portion 7 connecting member 71 upper surface plate 72 side surface plate 73 lower surface plate 74 connecting portion 75 convex portion 76 concave portion 8 connecting member 82 convex portion 9 Protrusion for engagement 101 Existing pipe 102 Rehabilitation pipe 103 Strip member 104 Backfill material 105 Pipe making machine

Claims (12)

A support member for a rehabilitation pipe provided in the existing pipe when filling the backfilling material between the inner surface of the existing pipe and the outer surface of the rehabilitation pipe,
An arc-shaped plate having a circumference longer than the outer circumference of the rehabilitated pipe and fixed to the upper side or the lower side of the existing pipe, and an inner surface of the existing pipe disposed on the outer surface of the arc-shaped plate and the outer surface of the rehabilitated pipe A plurality of protrusions that maintain a spacing,
The arcuate plate is provided with connecting means for connecting the arcuate plates at least on the right side and the left side when viewed from the axial direction,
The connecting means extends along the outer surface of the arcuate plate and the outer surface of the rehabilitation pipe and supports the rehabilitation pipe together with the arcuate plate,
A support member for a rehabilitated pipe, wherein a plurality of arc-shaped plates are connected to each other by the connecting means and are arranged at intervals in the pipe axis direction of the existing pipe. In the rehabilitation pipe support member according to claim 1,
As the connecting means, connecting members extending in the axial direction are provided on the left and right outer surfaces of the arc-shaped plate, and each connecting member has a structure that can be connected to a connecting member provided on another arc-shaped plate. Tube support member. In the rehabilitation pipe support member according to claim 1,
As the connecting means, the engaging projections are provided on the left and right outer surfaces of the arc-shaped plate, and the connecting member is provided with a connecting member connected to the engaging protrusion at the end in the axial direction. A member for supporting a rehabilitation pipe, wherein the member is disposed along a longitudinal direction of the pipe line. In the rehabilitation pipe support member according to claim 3,
The engaging protrusion is provided with an axial length longer than the axial length of the arcuate plate, and provided with engaging portions that protrude in the axial direction from the arcuate plate at both ends. Element. In the rehabilitation pipe support member according to claim 3,
The engaging protrusion is provided with a length in the axial direction shorter than the length in the axial direction of the arcuate plate, and the connecting member is disposed so as to straddle the plurality of arcuate plates. . The rehabilitation pipe support member according to any one of claims 3 to 5,
A rehabilitating pipe support member, wherein the connecting member is connected to the engaging portion of the engaging protrusion in an interference-fitted state. The rehabilitation pipe support member according to any one of claims 3 to 5,
The connecting member and the engaging protrusion include bolt holes that overlap each other, and the connecting member and the engaging protrusion are bolt-connected to each other. The rehabilitation pipe support member according to any one of claims 3 to 5,
The connecting member is provided with a connecting portion having a substantially rectangular tube shape, substantially cylindrical shape, or groove shape, and is inserted into the engaging projection portion in the axial direction so that the connecting member and the engaging projection portion are connected. A rehabilitating tube support member characterized. A rehabilitation pipe support member according to any one of claims 3 to 8,
A plurality of connecting members include members having different lengths in the axial direction, and an arcuate plate is disposed along a bent portion of a pipe of an existing pipe. A rehabilitation pipe support member according to claim 9,
A rehabilitating pipe support member characterized in that the connecting member has elasticity and can be bent and deformed along a bent portion of the existing pipe. A rehabilitation pipe support member according to any one of claims 3 to 10,
The engaging protrusion has a convex portion that protrudes outward in the radial direction and contacts the inner surface of the existing pipe, and a concave portion that is recessed inward in the radial direction from the convex portion,
The convex part keeps the space between the outer surface of the rehabilitated pipe and the inner surface of the existing pipe, and the concave part forms a gap for circulation of the backfill material between the outer surface of the rehabilitated pipe and the inner surface of the existing pipe. Support member for rehabilitation pipe. The rehabilitation pipe support member according to any one of claims 2 to 11,
The connecting member has a convex portion protruding outward in the radial direction and contacting the inner surface of the existing pipe, and a concave portion recessed inward in the radial direction from the convex portion,
The convex part keeps the space between the outer surface of the rehabilitated pipe and the inner surface of the existing pipe, and the concave part forms a gap for circulation of the backfill material between the outer surface of the rehabilitated pipe and the inner surface of the existing pipe. Support member for rehabilitation pipe.

Images