Construction method for performing lining inside existing sewer with elevation process, and elevation member therefor

Abstract

To obtain a construction method capable for constructing a large-diameter lining pipe without reducing an effective cross-section inside a sewer as much as possible, in lining construction in which a self-propelled pipe-making machine is used to spirally wind a long strip-shaped member inside the sewer and a backfill layer is applied between the lining pipe and the sewer.SOLUTION: A lining pipe is formed over a predetermined length, a tip part of the lining pipe is lifted up, and an elevation member of a predetermined height, mainly made of a reinforced mesh, is inserted and installed on a bottom of a sewer between a lower surface of the lining pipe and the bottom surface of the sewer.SELECTED DRAWING: Figure 18

Description

[Technical field]

[0001] The present invention relates to a lining method for forming a lining pipe by spirally winding a long, plate-like band-shaped member inside a sewer, and producing the lining pipe by a self-propelled (self-propelled) moving pipe-making device. More specifically, the present invention relates to a lining method for inside a sewer, using a band-shaped member having joints formed on both side edges, a joining mechanism consisting of an inner roller and an outer roller arranged on a flexible forming frame that takes a predetermined closed shape, and a lining pipe formed by spirally winding the band-shaped member by the clamping joining function of the inner roller and the outer roller. In this pipe lining production device for inside the sewer, a band-shaped member having plastic deformability is used, and the forming frame moves via a guide along a rigid regulating frame of a predetermined shape, thereby obtaining a lining pipe having a shape similar to the cross-section of the sewer. [Background technology]

[0002] In recent years, in the lining of the inside of the pipe, a backfill concrete layer of a specified thickness (hereinafter simply referred to as "backfill layer") has been laid around the entire circumference to improve earthquake resistance. In the construction of the bottom backfill layer, concrete is poured for backfilling before the pipe making process, and after it hardens, a pipe making device is installed and the lining pipe, the so-called rehabilitated pipe, is made. However, when concrete is poured before the pipe-making process, the distance between the top of the concrete and the top of the existing pipe, i.e., the height inside the pipe, becomes shorter, which results in a reduction in the diameter of the pipe-making equipment installed in that space (maximum width of the machine), and the height dimension of the lining pipe formed by the pipe-making equipment is reduced by the amount of the previous thickness. As a result, problems have been pointed out, such as a reduction in the cross-sectional diameter of the formed lining pipe, which leads to a decrease in the flow rate inside the lining pipe, and further an increase in construction costs due to an increase in backfill material. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2019-188670 A Summary of the Invention [Problem to be solved by the invention]

[0004] In view of the above-mentioned circumstances, the present invention aims to improve on the above-mentioned conventional construction method (pouring concrete before the pipe-making process) and provide a lining construction method that can ensure a backfill layer of a specified thickness and can construct a lining pipe of the desired diameter by arranging a pipe-making device without reducing the cross-sectional diameter, as well as construction tools and members (specifically, raising members) to be used in carrying out said lining construction method. [Means for solving the problem]

[0005] The lining construction method for an existing pipe culvert including a raising step and the raising member thereof according to the present invention specifically have the following configurations. (First Invention) The first aspect of the present invention relates to a lining construction method for a pipe, as described in claim 1, A lining method using a pipe making device S, in which a strip-shaped member 100 is continuously fed into a pipe P having a rectangular cross section, and spirally wound to form a lining pipe R having a rectangular cross section similar to the cross section of the pipe P, In the lining construction method for a pipe, after forming the lining pipe R to a predetermined length, a backfill layer is formed by injecting cement milk into the gap between the inner wall surface of the pipe P and the outer surface of the lining pipe R, including the bottom, As the unit length of the lining pipe R is formed, the tip of the lining pipe R is lifted up, and a raising member K mainly made of a lattice-shaped reinforcing bar is inserted and installed on the bottom surface of the pipe P between the lower surface of the lining pipe R and the bottom surface of the pipe P, Then, the tip of the lining pipe R is pulled down, and the unit length of the lining pipe R is formed again. It is characterized by: (Second Invention) The second aspect of the present invention relates to a lining method for a pipe, as described in claim 2, A lining method using a pipe making device for forming a lining pipe having a horseshoe-shaped cross section similar to the cross section of a pipe by spirally winding a continuously fed strip-shaped material in a pipe having a horseshoe-shaped cross section, comprising: In the lining construction method for a pipe, after forming the lining pipe to a predetermined length, a backfill layer is formed by injecting cement milk into a gap between the inner wall surface of the pipe and the outer surface of the lining pipe, including the bottom portion, on all four sides of the gap, As the unit length of the lining pipe is formed, the tip of the lining pipe is lifted up, and a raising member mainly made of a lattice-shaped reinforcing bar is inserted and installed on the bottom surface of the culvert between the lower surface of the lining pipe and the bottom surface of the culvert, Then, the tip of the lining pipe is pulled down to form a unit length of the lining pipe again. It is characterized by: In the above, 1. "A pipe making device S that spirally winds a continuously fed strip-shaped member 100 to form a lining pipe R with a rectangular cross section similar to the cross section of the pipe" refers to a pipe making device that has pipe making elements such as a forming frame, a regulating frame, a joining mechanism, etc. that are necessary for forming the lining pipe. 2. The "unit length" of the lining pipe R is determined by the length that can be lifted against the weight of the newly formed lining pipe and the pipe making equipment at its tip, and is determined by the construction conditions.

[0006] (action) This construction method is carried out from the initial stage of formation at the mouth of the lining pipe R. As each unit length of the lining pipe R is formed, a bulking member K is inserted and installed, and this process is repeated to form a lining pipe R of a specified length. When the formation of the lining pipe R in the construction section is completed, the raising members K are installed in the entire section. Then, the front and rear ends of the lining pipe R are sealed, and cement milk is injected into the gap between the pipe P and the lining pipe R on all four sides to construct the backfill layer.

[0007] (Third and fourth inventions) The third aspect of the present invention relates to a raising member used in a lining construction method for a pipe, as described in claim 5, The raising member K is a mesh plate 70 made of reinforcing bars arranged in a lattice pattern. It is characterized by: The third aspect of the present invention relates to a raising member used in the lining construction method for the inside of a pipe, as described in claim 6, The raising member K is formed by attaching a support stand 72 that supports a mesh plate 70 to a mesh plate 70 that is made of reinforcing bars arranged in a lattice shape. It is characterized by:

[0008] (action) The lining pipe R to be formed is successively placed on the mesh plate 70 of the raising member K, which has a smooth bottom surface, so that the load of the lining pipe R is evenly transmitted to the culvert P. The raising member K ensures a backfill layer space of uniform thickness. The cement milk filler passes easily through the lattice-like rebar structure, forming a homogeneous backfill layer. Effect of the Invention

[0009] According to the method of constructing lining pipes in sewer culverts of the present invention, the pipe making equipment forms the lining pipe while running along the bottom surface of the existing sewer culvert, making it possible to use a pipe making equipment with the largest diameter, without reducing the diameter of the construction cross section, and also reducing the amount of backfill material to be filled, making it possible to carry out lining construction with an economical backfill layer. In addition, the bulking member used in the present invention does not impede the inflow of the injected cement milk, and ensures the construction of a reliable backfill layer. Moreover, by using a bulking member of an appropriate height, it is possible to accommodate backfill layers of any thickness. [Brief description of the drawings]

[0010] [Figure 1]1 is a front view of an overall view of a lining pipe making device applied to a lining construction method for an existing pipe including a height raising process of the present invention, inside a pipe. [Diagram 2] A rear view of the lining pipe making device inside a sewer. [Diagram 3] A side cross-sectional view of the lining pipe making device inside a sewer (cross-sectional view taken along line 3-3 in Figure 1). [Figure 4] Top view of the lining pipe making device inside a sewer. [Diagram 5] 4 is a diagram showing the correspondence between the regulating frame and the forming frame in the lining pipe making device inside the sewer. FIG. [Figure 6] Cross-sectional view taken along line 6-6 in Figure 5. [Figure 7] FIG. 7 is a detailed diagram of the forming frame (view taken from the direction of arrow 7 in FIG. 8). [Figure 8] FIG. 8 is a side view of the molding frame (view taken in the direction of the arrow 8 in FIG. 7). [Figure 9] Installation diagram of the forming frame of the joining mechanism part. [Figure 10] FIG. [Figure 11] 11 is a cross-sectional view (cross-sectional view taken along line 11-11 in FIG. 10) showing the configuration of the joining mechanism (including a portion of the configuration of the feed mechanism). [Figure 12] 12 is a cross-sectional view showing the configuration of a feed mechanism (cross-sectional view taken along line 12-12 in FIG. 10 ). [Figure 13] 13 is a top view showing the configuration of the feed mechanism (view taken in the direction of the arrow 13 in FIG. 10 ). [Figure 14] 14(a) is a plan view showing one embodiment of the raising member K used in the present invention, FIG. 14(b) is a side view thereof (viewed in the direction of arrow 14b in FIG. 14(a)), and FIG. 14(c) is another side view thereof (viewed in the direction of arrow 14c in FIG. 14(a)). [Figure 15] 15A is a front view of one embodiment (72B) of a support base constituting a part of the raising member K, FIG. 15B is a plan view thereof (viewed in the direction of the arrow 15b in FIG. 15A), and FIG. 15C is a side view thereof (viewed in the direction of the arrow 15c in FIG. 15A). [Figure 16]16A is a front view of a holder of another embodiment (72A), FIG. 16B is a plan view thereof (viewed in the direction of arrow 16b in FIG. 16A), and FIG. 16C is a side view thereof (viewed in the direction of arrow 16c in FIG. 16A). [Figure 17] (a) is a longitudinal cross-sectional view of the inside of the sewer showing the process prior to the raising process, and (b) is its transverse cross-sectional view. [Figure 18] (a) is a longitudinal cross-section of the sewer showing the later stages of the elevation process, and (b) is its transverse cross-section. [Figure 19] A cross-sectional view of a sewer showing the procedure for filling the lining pipe with backfill material inside the sewer. [Figure 20] FIG. 1(a) is a cross-sectional view showing one embodiment of a belt-shaped member used in the present invention, and FIG. 1(b) is a cross-sectional view showing the joining relationship of this belt-shaped member. [Figure 21] FIG. 17(b) is a cross-sectional view of the inside of a pipe showing a construction method for a horseshoe-shaped cross-section pipe according to another embodiment of the present invention. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0011] An embodiment of a lining method for an existing pipe culvert including a raising step and a raising member thereof according to the present invention will be described with reference to the drawings. 1 to 20 show one embodiment of the present invention, illustrating a lining method for a lining pipe (also called a rehabilitating pipe) in a rectangular cross-section culvert. That is, Figures 1 to 4 show the overall schematic configuration of a spiral winding free cross-section pipe-making lining pipe-making apparatus S (hereinafter abbreviated as ``pipe-making apparatus'') inside a sewer which is applied to this construction method, Figures 5 to 13 show more detailed partial configurations of the lining pipe-making apparatus S, and Figure 19 shows one embodiment of a strip-shaped member used in the present invention. 14 to 19 show the procedure for the step of raising the height of the main parts according to the present invention. In these figures, P indicates a piping with a rectangular cross section, and R indicates a lining pipe made by this pipe making device S. The direction of travel of the lining pipe R made by this pipe making device S (arrow B) is used to determine the front and rear. In this embodiment, a pipe with a rectangular cross section is shown, but this does not exclude the cross section of the pipe being horseshoe shaped or other shaped. Also, while the feed function (mechanism) of the pipe making device is shown to be a feed roller type, this does not exclude the use of other conventionally known mechanisms.

[0012] Belt-shaped member 100 (See Figure 20) Prior to describing the configuration of the present pipe making apparatus S, a belt-shaped member that is applied to the present pipe making apparatus S will be described. FIG. 20 shows an example of a belt-shaped member that can be used in the lining pipe making apparatus S of this embodiment. The belt-shaped member 100 has a flat body of a constant thickness, and an appropriate number of ridges 102 (five in the illustrated example, usually three) are continuously provided vertically in the longitudinal direction of its outer surface. Flanges 102a are formed at the tips of the ridges 102. Grooves 104 or groove spaces are formed between the ridges 102. The inner surface 106 is formed to be substantially smooth. Joints 100A, 100B that overlap and engage with each other are formed on both sides of the belt-shaped member 100. That is, the base of the protrusion 102A at the front end of the leading edge side joint 100A is expanded in diameter, a groove 110 is formed vertically on the inner surface side, and a protrusion 112 is further formed continuously from the protrusion 102A. The trailing edge side joint 100B has a protrusion 114 stretched from the protrusion 102B at the rear end, and a protrusion 116 that engages with the groove 110 of the leading edge side joint 100A is formed vertically near the end of the protrusion 114. In this belt-shaped member 100, a plastic deformation member 120 is attached between the intermediate protrusions 102 as a plastic deformation functional material made of metal (usually steel). The plastic deformation member 120 is processed by continuously bending a long metal flat plate in its longitudinal direction. The position of the plastic deformation member 120 is not limited to the position shown in the figure, and it may be in another position or in multiple places.

[0013] During joining, the front and rear edges of adjacent belt-shaped members 100 overlap, and the front and rear joint parts 100A and 100B are sandwiched between the outer and inner rollers of the joining roller part described below, so that the protruding strip 116 fits into the recessed groove 110, and the end of the overhanging part 112 fits into the flange 102a of the protruding strip 102B, and they are joined. In this case, the main engagement is between the recessed groove 110 and the protruding strip 116, and the overhanging part 112 and the protruding strip 102B form a secondary engagement, and therefore the secondary engagement may be omitted in some cases. Furthermore, in this embodiment, a sealant 118 is interposed between the contacting portions of the overhanging portions 112, 114 to improve the joining property. If the fitting engagement at the joints 100A, 100B is sufficient, the sealant 118 can be omitted. The belt-shaped member is made of a synthetic resin material, and polyvinyl chloride (PVC) resin, which can be continuously molded by extrusion molding, is particularly suitable from the standpoint of moldability.

[0014] Pipe Lining Equipment S (See Figures 1 to 13) As shown in Figs. 1 to 4, the construction device S mainly comprises a rigid rectangular regulating frame 10 and a flexible forming frame 13 which has guide rollers 11 arranged on its outer periphery and is arranged movably around the outer periphery of the regulating frame 10 via guide elements 12. The flexibility of the forming frame 13 is 180°, allowing it to bend outward freely, while its inward bending is restricted by a bending prevention mechanism. The forming frame 13 mainly comprises an inner roller 15 and an outer roller 16 which are attached at a predetermined interval, and a joining mechanism 19 including a drive unit 17 for driving the rollers 15 and 16 and a feed roller 18 which is linked to the drive unit 17 via a feed mechanism U is fixedly attached to the forming frame 13. The joining mechanism 19 receives a driving force from the drive unit 17 and the forming frame 13 clamps the belt-shaped member 100 and rotates. In this construction apparatus S, the feed roller 18 is linked to the drive unit 17 via a feed mechanism unit U, and rotates in the opposite direction to the outer surface roller 16. Furthermore, in this construction apparatus S, a positioning mechanism T is added.

[0015] The detailed configuration of the pipe producing apparatus S will be described below with reference to Figs. Molding frame 13 (See Figures 5 to 9) The forming frame 13 is an annular body having a required width, and is flexible in the outer diameter direction by a link mechanism consisting of a series of link bodies 21 (frame portion 21a, shaft portion 21b) as a whole, and has lateral rigidity. The guide rollers 11 are rotatably disposed on each shaft portion 21b of the link mechanism of the forming frame 13. The drive portion 17 of the joining mechanism portion 19 is attached to one attachment portion 21A of the link body 21 of the forming frame 13. (Anti-break mechanism) The link bodies 21 can be bent outwardly with respect to each other at an angle of 180°, but are prevented from bending in the middle. For this reason, a bending prevention mechanism is provided on the side surface of the frame portion 21a of the link body 21. An example of this is shown in Figure 8. In the figure, 22 is a stopper.

[0016] Guide roller 11 (See Figures 5 to 9) The guide rollers 11 are rotatably mounted on each shaft portion 21b of the link body 21 of the forming frame 13. The roller body is made of a hard synthetic resin or metal body, and abuts against the inner surface of the belt-shaped member 100. The standard guide roller 11 (11a) has a length that fully fills the inner width of the link body 21, but a required number of guide rollers 11 (11b) (usually 1 or 2) in the front part of the joining mechanism part 19 are usually shifted backward by the width of the belt-shaped member 100, or are specially shortened (see FIG. 9).

[0017] Joining mechanism section 19 (See Figures 10 to 13) The joining mechanism 19 includes a joining roller section (including the inner roller 15 and the outer roller 16), a drive section 17, and a feed roller 18, and is attached to the mounting section 21A of the forming frame 13. The joining mechanism 19 mainly includes a joining roller section in which the inner roller 15 and the outer roller 16 are paired, a box body 25 containing a gear mechanism 24 for synchronously rotating the rollers 15, 16, and a hydraulic motor 26 attached to the box body 25 as a rotation drive source for the rollers 15, 16. The joining mechanism 19 is disposed corresponding to the joining section of the belt-shaped member 100 wound in a spiral shape, that is, the position where the belt-shaped member 100 is first closed. The gear mechanism 24, the box body 25, and the hydraulic roller 26 constitute the drive section 17, and the feed roller 18 is linked to the drive section 17 via the feed mechanism U. The inner roller 15 is attached to the shaft section 21b of the link body 21 of the forming frame 13, similar to the guide roller 11.

[0018] (Box 25) 10, the box body 25 is divided into an upper portion and a lower portion, and the upper portion can be opened around a pin axis p, and the upper portion is closed to the lower portion by a closing device 27. The box body 25 holds the gear mechanism 24 and the shaft portion of the feed roller 18 with its front and rear surfaces across the upper and lower portions. In addition, in the lower portion of the box body 25, the front portion serves as the mounting portion for the hydraulic motor 26, and the rear portion is attached to the shaft portion 21b of the link body 21 of the mounting portion 21A of the forming frame 13.

[0019] (Gear mechanism 24) 11, the gear mechanism 24 has three shafts 29, 30, 31 rotatably suspended from below across the front and rear walls of the box body 25, and gears 32, 33, 34 are fixed to the shafts 29, 30, 31. The inner roller 15 of the joining roller unit is connected to the second shaft 30, and the outer roller 16 is connected to the third shaft 31. As shown in the figure, the second shaft 30 rotates in the opposite direction to the rotation of the first shaft 29, and the third shaft 31 rotates in the forward direction, so that the inner roller 15 and the outer roller 16 rotate in opposite directions to each other.

[0020] (Feed roller 18, feed mechanism U) As shown in Figures 10, 11, 12, and 13, the feed mechanism U mainly comprises a feed roller 18, a feed roller drive shaft 36 journalled on the upper part (outer part of the pipe diameter) of the box body 25, an (inner) gear 37 fixed to the third shaft portion 31, and an (outer) gear 38 fixed to the feed roller drive shaft 36 and meshing with the gear 37, and the feed roller 18 is fixed to the feed roller drive shaft 36 extended outside the box body 25. More specifically, the third shaft portion 31 is the original shaft of the feed roller mechanism U, and the feed roller drive shaft 36 is disposed as a slave shaft outside the original shaft 31 and parallel to the original shaft 31, and is disposed rearward of the original shaft 31 in the traveling direction of the joining mechanism. The internal gear 37 has a small diameter on a pitch circle, and the external gear 38 that meshes with the internal gear 37 has a sufficiently large diameter on the same pitch circle, and the diameter of the feed roller 18 is slightly larger than the diameter of the external gear 38. The diameter of the pitch circle of the internal gear 37 is smaller than the diameter of the portion where the outer roller 16 is pressed against the flange 102a of the protrusion 102 of the belt-shaped member 100 (this portion is knurled to prevent slippage). This allows the peripheral speed (feed speed) of the feed roller 18 to match (synchronize) with the feed speed of the outer surface roller 16 (i.e., the forming speed of the lining pipe).

[0021] (Hydraulic motor 26) The hydraulic motor 26 is attached to the front surface of the box body 25 with its drive shaft connected to the first shaft portion 29. An IN-side pipe 41a for feeding oil to the hydraulic motor 26 and an OUT-side pipe 41b for discharging oil from the hydraulic motor 26 are connected to the hydraulic motor 26. Furthermore, these pipes 41 are connected to a rotary joint 42 (see FIG. 3) attached to an appropriate position of the box body 25 or the forming frame 13, and a pipe 43 connected to an external pressure source is connected to the rotary joint 42. Through this rotary joint 42, the working fluid is exchanged between the pipe 41b on the hydraulic motor 26 side, which is accompanied by a rotating motion, and the external pipe 43, which is not accompanied by a rotating motion. By the gear mechanism 24 and the hydraulic motor 26 , the driving force of the hydraulic motor 26 is transmitted to the first shaft portion 29 , and is also transmitted via the gear mechanism 24 to the second and third shaft portions 30 , 31 . Furthermore, in the feed mechanism U, the rotational driving force of the third shaft portion (original shaft) 31 rotates the inner gear 37 integrally, rotating the outer gear 38 meshing with the inner gear 37 and the feed roller drive shaft (driven shaft) 36 in the opposite direction, and the rotational driving force of the feed roller drive shaft 36 is transmitted to the feed roller 18 at the end of the driven shaft 36, resulting in the feed roller 18 rotating in the opposite direction to the outer roller 16.

[0022] This joining mechanism part 19 is attached to the lining pipe R by opening the upper part of the box body 25 at the front end of the already formed lining pipe R, matching the pitch of the annular flange part of the outer surface roller 16 to the pitch of the protrusion 102 of the belt-shaped member 100, and then closing the upper part to the lower part, closing the closing device 27, and tightening the nut.

[0023] Restraint frame 10 and guide 12 (See Fig. 5 and Fig. 6) (Regulatory Frame 10) The regulating frame 10 is made of steel, has high rigidity, and has an overall rectangular shape. In this embodiment, a steel member having a hollow groove 45 is used, and the groove 45 opens outward. The regulating frame 10 is assembled using divided bodies. (Guide 12) The guide 12 is mounted between the forming frame 13 and the regulating frame 10, and guides the movement of the forming frame 13 along the track of the regulating frame 10. More specifically, the guide 12 has bearings 46 pivotally mounted on the shafts 21b of the forming frame 13 at both ends of its bifurcated body, and a roller holder 47 extends inward from the center of the body, and the roller holder 47 rotatably holds a rotating shaft 49 with rollers 48 attached to both sides. The rollers 48 are inserted into grooves 45 in the regulating frame 10 and move along the inner walls thereof.

[0024] Auxiliary roller mechanism T (See Fig. 2 and Fig. 3) Furthermore, the lining construction device S has an auxiliary roller mechanism T attached thereto via a regulating frame 10. In other words, this auxiliary roller mechanism T is installed at four corners of the angular regulating frame 10 and extends rearward in the pipe axial direction via the frame portion 58, and a roller 59 rotatably attached to the rear end of the frame portion 58 is pressed outward against the inner surface of the lining pipe R immediately after winding.

[0025] With the above-described configuration, the pipe making apparatus S constructs lining pipes as follows. That is, the forming frame 13, to which the guide rollers 11 and the joining mechanism 19 are attached, advances in the circumferential direction along the shape of the regulating frame 10, which maintains the same phase with respect to the pipe cross section, by the drive of the drive unit 17. At this time, the plastically deformable strip-shaped member 100 is wound spirally by the joining mechanism 19 to produce a rectangular lining pipe R, and the feed rollers 18 come into contact with the pipe wall of the pipe P, and their rotation smoothly advances the construction device S. Furthermore, as the forming frame 13 advances, the regulating frame 10 receives a pushing force from the forming frame 13 via the guides 12, and advances together with the forming frame 13. In the auxiliary roller mechanism T, the contact rollers 58 are pressed firmly against the inner surface of the lining pipe R, and the initial shape of the lining pipe is maintained in the vicinity of the rear of the forming frame 13. This allows the regulating frame 10 to be self-supporting and to move forward smoothly without co-rotating with the forming frame 13.

[0026] Lining construction The following describes the lining work inside the main sewer, which involves a raising process and is carried out using the main sewer lining pipe making device S. The procedure for construction work in a sewer pipe is shown based on Figures 14 to 19. In this construction work, an example of application to a sewer pipe P having a rectangular cross section is shown. Figure 19 shows the longitudinal cross-sectional structure of the sewer pipe P after construction is completed, i.e., after the backfill material has been filled in, where Q1 is the upstream manhole, O1 is its opening, Q2 is the downstream manhole, O2 is its opening, and E is the ground in which the pipe P will be buried. In this construction work, construction is carried out from the upstream manhole Q1 side to the downstream manhole Q2 side. At the aboveground portion, a payout device (not shown) for the belt-shaped member 100 is installed on the upstream side, and the belt-shaped member 100 is continuously supplied by this payout device from the opening O1 of the manhole to the present pipe making device S installed in the manhole Q1. Also, a hydraulic source (not shown) is provided on the downstream side.

[0027] The lining work inside the sewer is carried out based on the following procedure. (1) Preparation and initial steps (1a) Preparation process The lining pipe making device S is carried in a disassembled state into the manhole Q1 upstream of the rectangular cross-section culvert P to be rehabilitated through the opening O1 of the manhole, and the pipe making device S is assembled in the manhole Q1. The forming frame 13 of the pipe making device S can be disassembled and assembled, and the regulating frame 10 is also made of separate bodies, making it easy to carry it into the manhole. Furthermore, the joining mechanism 19 can be attached to the forming frame 13, making it easy to install on site. The feed rollers 18 and the feed mechanism U are incorporated into the joining mechanism 19, and the feed rollers 18 and the feed mechanism U are installed together with the assembly of the joining mechanism 19. The forming frame 13 is restrained by the regulating frame 10 via the guide 12, and is arranged in a rectangular shape around the regulating frame 10. The joining mechanism 19 is connected to a hydraulic piping system arranged from the downstream side. Furthermore, an auxiliary roller mechanism T is attached to the regulating frame 10 of the present pipe making apparatus S, and the contact rollers 59 of the auxiliary roller mechanism T are retracted inward at each corner of the regulating frame 10. At this time, the pipe making device S is selected to occupy as much of the pipe cross section as possible within the range that satisfies the design conditions. In addition, materials and construction equipment (raising materials K, jacks, etc.) to be used in the raising process (described later) are carried into the sewer P. (1b) Initial process The strip-shaped member 100 incorporating the plastic deformation material 120 is pulled into the sewer P through the manhole and introduced into the joining mechanism 19 of the lining construction device S, which then drives the strip-shaped member 100 to wind it around the rectangular forming frame 13. At each corner of the regulating frame 10, and therefore at each corner of the forming frame 13, the strip-shaped member 100 is bent at right angles by the plastic function of the plastic deformation material 120. In the second winding of the strip-shaped member 100, the adjacent strip-shaped members 100 are joined by their joints. The strip-shaped member 100 is wound around the forming frame 13 several times to produce a lining pipe (initial lining pipe) Ro. After the rear end of the initial lining pipe Ro passes through the contact roller 58 of the auxiliary roller mechanism T, the contact roller 58 of the auxiliary roller mechanism T is pressed firmly against the inner surface of the initial lining pipe Ro to fix it in place, thereby maintaining the cross-sectional shape of the initial lining pipe Ro in its initial state in the forming frame 13. Following this initial step, the following (2) regular step, (3) raising step, and (3a) initial work are performed, and depending on the circumstances, a raising member K may be installed in this step. That is, it is also possible to raise the end of the lining pipe facing the pipe mouth of the initial lining pipe Ro from the bottom of the piping P, and insert and install the raising member K from the pipe mouth.

[0028] (2) Steady-state process As the inner and outer rollers 15, 16 of the joining mechanism 19 are rotated, the clamping action between the inner roller 15 and the outer roller 16 joins the newly supplied strip-shaped member 100, which is connected to the start lining pipe Ro by its joint structure, at the closing portion of the strip-shaped member 100. Furthermore, by driving the joining mechanism 19 of this construction device S, the forming frame 13 to which the guide rollers 11 and the joining mechanism 19 are attached advances along the shape of the regulating frame 10 via the guides 12. At the corners of the regulating frame 10, the joining rollers 15, 16 of the joining mechanism 19 fold the strip-shaped member 100 inward. The strip-shaped member 100 has plastic deformation properties and maintains the folded state. The feed roller 18 rotates in the opposite direction to the outer roller 16 in conjunction with the joining mechanism 19 and comes into contact with the pipe wall of the pipe P, and receives a reaction from the pipe wall as a result of this rotation, causing this device S to rotate. The entire pipe making apparatus S rotates in the pipe circumferential direction (direction A) and advances in the pipe axial direction (direction B). This causes the strip-shaped member 100 to be wound helically, and a rectangular lining pipe R is made.

[0029] (2a) In this process, the feed roller 18 and the feed mechanism U perform the following functions. That is, the feed mechanism U incorporated in the joining mechanism 19 has its gears (internal gear 37, external gear 38) meshed together, so that the feed rollers 18 rotate in the opposite direction to the rotation of the outer rollers 16. Then, when the joining mechanism 19 of the forming frame 13, which moves around the regulating frame 10, reaches the pipe bottom (the pipe bottom of the pipe P), the feed rollers 18 come into contact with the pipe bottom surface of the pipe P, and due to this rotation, a reaction force is received from the pipe bottom surface, causing the forming frame 13 and therefore the entire device S to move (in the direction of A) along the pipe bottom surface. At this time, the circumferential rotation of the feed roller 18 is synchronized with the moving speed of the joining mechanism part 19 (in other words, the forming speed of the lining pipe R), so that the bottom (and sides) of the lining pipe R are formed smoothly.

[0030] (2b) Furthermore, in this process, the regulating frame 10 and the forming frame 13 maintain their positional relationship (phase) independently of each other by the auxiliary roller mechanism T attached to the regulating frame 10, and there is no mutual interference, i.e., no co-rotation, between the two frames 10, 13, and the movement of the guide piece 12 linked to the forming frame 13 is carried out smoothly. In other words, there is no rubbing or one-sided contact with respect to the circumferential movement of the main body of the guide piece 12 in the groove 45 of the regulating frame 10, and the circumferential movement is carried out smoothly.

[0031] (3) Raising process In the steady-state process following the above-mentioned initial process, a process of installing a raising member K between the lower bottom surface of the lining pipe R and the bottom surface of the pipe P is carried out for each unit length of the lining pipe R (for example, 1 m to 1.2 m in the case of construction in a large cross-section pipe) that is to say, a raising process. (Raising member K) 14 to 16 show the detailed structure of the raising member K. This raising member K consists of a mesh plate 70 and a support stand 72, and has an overall predetermined width (for example, 1500 mm in the case of construction in a large cross-section culvert (same below),), vertical width (for example, 500 mm), and height (for example, 30 mm), and is installed side by side in the front-to-back direction (pipe axis direction) on the bottom surface of the culvert P. However, there is also an embodiment in which the support stand 72 is removed and the height is low (for example, 10 mm). (Mesh plate 70) (See FIG. 14) The mesh plate 70 is made by assembling small round steel bars vertically in a lattice pattern, with vertical bars 70a arranged at the top and horizontal bars 70b arranged at the bottom, and the joints are welded to maintain overall rigidity. Now, by using small round steel bars with a diameter of 5 mm, the thickness (height) of the mesh plate 70 is 10 mm, and if round steel bars with a diameter of 7 mm are used, the thickness of the mesh plate 70 is 14 mm, and if round steel bars with a diameter of 10 mm are used, the thickness is 20 mm. Also, if round steel bars with a diameter of 5 mm are arranged in three stages, a mesh plate 70 with a thickness of 15 mm is obtained, which corresponds to a backfill layer thickness of 10 mm to 20 mm.

[0032] (Holding table 72) (See Figures 14, 15, and 16) The holder 72 is assembled by rebar processing, and is fitted and assembled to the mesh plate 70 to fixedly support the mesh plate 70 from below. Figure 14 (and Figure 16) shows one example of a holder 72A, and Figure 15 shows a holder 72B. The holding base 72B shown in FIG. 15 is composed of support member 72a, which is formed into an Ω (ohm) shape by bending two small-diameter round steel bars and arranged in parallel with each other at a predetermined distance, and two straight-line reinforcing bar receiving members 72b of a predetermined length which are welded and fixed in parallel with each other to the upper surface of support member 72a. The two support members 72a are spaced apart by, for example, 50 mm, and the two reinforcing bar receiving members 72b have a length of, for example, 70 mm. More specifically, the support member 72a, which is made by bending round steel material into an Ω shape, consists of horizontal legs 721 on both sides, column sections 722 rising from the horizontal legs 721, and an upper beam section 723 connecting the upper ends of the column sections 722, the horizontal legs 721 abutting the bottom surface of the pipe P, and the above-mentioned reinforcing bar support material 72b is placed and fixed on the upper beam section 723. The support member 72a has a height h (FIG. 15(a)), and the thickness of the raising member K can be freely determined. The reinforcing bar receiving member 72b has a groove, i.e., a reinforcing bar receiving portion 73, formed by the gap between two straight reinforcing bars arranged in parallel with each other, and the reinforcing bar, i.e., the vertical bar 70a of the mesh plate 70 is fitted and held in the reinforcing bar receiving portion 73. Fig. 16 shows the details of the holder 72A (in the figure, the same members as in Fig. 15 are given the same reference numerals). The holder 72A has a rectangular restraining frame 74 made of round steel welded and fixed around a pillar 722 of the holder 72B at the lower part of the pillar 722, which gives the holder 72 high rigidity.

[0033] (Assembly of mesh plate 70 and support base 72) The retaining bases 72 (72A, 72B) clamp the vertical bars 70a of the mesh plate 70 with their reinforcing bar receiving portions 73, and retain the mesh plate 70 from below. A large number of support bases 72 are attached to the mesh plate 70 and stably support the raising members K. (Mode of Use) The raising member K is used in different ways depending on the thickness of the backfill layer at the bottom of the lining pipe R to be applied, i.e., the design, and in accordance with the design conditions. 1) When the backfill layer is thin (10 mm to 20 mm), only the mesh plate 70 is used. 2) When the backfill layer is thick (over 20 mm), a support stand 72 is attached to the mesh plate 70. Furthermore, a support member 72a of the support stand 72 with an appropriate height (h) is used to correspond to the thickness of the backfill layer.

[0034] (3a) Initial Work In the initial pipe making process (see (1b)), after a predetermined length of initial lining pipe Ro has been made, the pipe making work is temporarily stopped, and the lining pipe Ro is lifted together with the pipe making device S in accordance with the lifting work described below in (3c), and the raising member K is inserted and installed up to the rear end of the lining pipe Ro (i.e., the pipe mouth of the culvert P). After that, by lowering the pipe making device S and the lining pipe Ro, the pipe making device S (when its joining mechanism part 19 is at the bottom) is placed on the bottom surface of the culvert P, and the lining pipe Ro is placed on the top surface of the raising member K. This operation can be replaced with the installation of the raising member K described in the initial step (1b) above.

[0035] (3b) Pipe making work Following the initial operation (3a) described above, the stationary process (2) described above is carried out over a predetermined length (about 1.0 m to 1.2 m). In other words, initially, the bottom surface of the tip of the lining pipe R produced by the pipe making device S is at the same height as the upper surface of the raising member K, but when the joining mechanism part 19 of the pipe making device S moves away from the bottom surface of the pipe P (i.e., when it is on the side and above the pipe P), as the pipe making device S progresses, i.e., as the lining pipe R is formed, the tip of the lining pipe R gradually hangs downward, and after a certain length, the tip comes into contact with the bottom surface of the pipe P (Figure 16(a) shows this state).

[0036] (3c) Lifting and lowering work and installation of raising member K Thereafter, the pipe making device S is lifted and the raising member K is inserted and installed. To insert and install the raising member K, a predetermined device and tool (member) is used. (1) 17(a) and (b), a lifting device 75, a raising member K and its pushing tool (rod) 77 (shown in FIG. 18) are prepared facing the pipe making device S, and the lifting device 75 is first installed on the underside of both sides of the pipe making device S. The lifting device 75 abuts against the pipe making device S so as to abut against the straight part at the bottom of the lining pipe R, avoiding the curved part (rough part) at the corner of the lining pipe R. In this embodiment, an air jack (75a indicates an air bag, and 75b indicates an air pressure pipe) is used as the lifting device 75, but this does not exclude hydraulic jacks and other lifting devices with jacking up functions. These are installed in a small working space and have sufficient lifting capacity. (2) Next, as shown in Figs. 18(a) and (b), the lifting device 75 is operated (jacked up) to lift the tip of the lining pipe R to the upper surface (ceiling surface) of the culvert P or near thereto. In this state, the bulking member K is manually inserted below the lining pipe R using a push-in tool (rod body) 77 as an insertion tool. The bulking member K is then pushed in the direction H (FIG. 18(a)) using the push-in tool 77 until it abuts against the previously installed bulking member K. In this state, the newly pushed-in installed bulking member K has a slight gap between it and the bottom surface of the lining pipe R. (3) Thereafter, the lifting device 75 is lifted up to lower the pipe making device S, the lifting device 75 is removed, and the entire lining pipe R except for the pipe making device S portion is placed on the raising member K. Then, the pipe is again produced over a slight length (about 500 mm) to elongate the lining pipe R. This elongation operation results in the above-mentioned step (3b). Incidentally, this stretching step may be omitted and the process may proceed directly to the above step (3b).

[0037] (3d) Repetitive process The above operations and steps (3b) and (3c) are repeated until the lining pipe R reaches a specified position (usually the pipe opening of the downstream manhole).

[0038] (4) When the lining pipe R reaches the downstream manhole, the operation of the lining pipe making device S is stopped and the pipe making device S is dismantled and removed through the downstream manhole Q2.

[0039] (5) As shown in Figure 19, a support structure H is installed inside the lining pipe R to give rigidity to the lining pipe R, and a reaction member I is installed to press the lining pipe R downward against the buoyancy caused by the injection of the hardening backfill material M in the next process. The support H forms a frame and has rigidity in itself, and is installed in close contact with the inner surface of the lining pipe R to prevent deformation of the flexible lining pipe R. The reaction member I is an elastic rod-shaped body, with its lower end abutting the bottom of the lining pipe R, its upper end penetrating the ceiling of the lining pipe R, and its upper end face abutting the ceiling surface of the pipe P, extending the rod-shaped body and using its downward force to push the lining pipe R downward.

[0040] (6) In each manhole Q1, Q2, as shown in FIG. 19, the space between the pipe P and the lining pipe R is sealed V, and hardening backfill material (so-called cement milk) M is injected into the gap between the pipe P and the lining pipe R on all four sides along the entire length of the pipe P. After the material has hardened, the supports H, reaction members I, etc. are removed, and the lining construction work is completed.

[0041] Aspects of the embodiment In the above embodiment, the feeding function of the pipe making device S is implemented using the feed rollers 18 and the feed mechanism U, but this does not preclude the use of other known feeding mechanisms. For example, the mechanisms disclosed in the applicants' JP 2015-112834 A, JP 2003-175547 A, JP 2003-33969 A, etc. may be used. The feed rollers 18 and the feed mechanism U are not essential to the present invention. In addition, although an auxiliary roller mechanism T is added to the pipe making apparatus S of this embodiment, it may be omitted, and the auxiliary roller mechanism T is not an essential feature of the present invention.

[0042] (Effects of the embodiment) According to this embodiment of the lining construction method within an existing pipe culvert, which involves a heightening process, pipe making work is carried out using the pipe making device S within the initial space while maintaining the cross-sectional space of the existing pipe culvert P, and there is no need to reduce the size of the pipe making device S brought in as in the conventional method (i.e., pre-casting), so that the maximum lining pipe can be formed and a backfill layer of the specified thickness can be secured. This increases the amount of wastewater flowing downstream and also reduces the amount of concrete used in the backfill layer, making construction more economical. In addition, the raising member K allows the backfilling cement milk to flow in and fill the bottom of the culvert P smoothly, and also exerts a reinforcing effect, ensuring the construction of the backfilling layer at the bottom of the culvert P. Furthermore, the raising member K can accommodate backfill layers of any thickness by using only the mesh plate 70, a combination of the mesh plate 70 and the support stand 72, or even by using a support stand 72 of an appropriate height h.

[0043] The present invention is not limited to the above-described embodiment, and various design modifications are possible within the scope of the basic technical concept of the present invention. In other words, the following aspects are included within the technical scope of the present invention. 1) In the above embodiment, a construction method for a pipe having a rectangular cross section was shown, but the present invention can also be applied to pipes having other cross sections, such as a horseshoe shape, an egg shape, or even a circle shape. Fig. 21 shows an application to a pipe P having a horseshoe-shaped cross section. In the figure, the same members as those in the previous embodiment are given the same reference numerals. In the following description, the same reference numerals are used for the same members as those in the previous embodiment. In this embodiment, a regulating frame 10 (not shown) in a pipe making device S (not shown) is shaped similarly to the pipe P, and a lining pipe R made of a plastic strip-shaped member 100 is formed along this regulating frame 10. The figure shows a state in which a joining mechanism part 19 in the pipe making device S is located on the side of a horseshoe-shaped cross-section pipe P (therefore, the tip of the lining pipe R abuts against the bottom surface of the pipe P). A raising member K (not shown) is laid between the bottom surface of the pipe P and the bottom surface of the lining pipe R, and when the lining pipe R is lifted up during the laying work, the top of the lining pipe R abuts the top of the pipe P or there is a small gap between them. 2) Regarding the driving source, a hydraulic system is used in this embodiment, but it may be driven by air pressure or electricity. [Explanation of symbols]

[0044] S: Pipe lining device, P: Pipe, R: Tubular body (lining pipe), K: Heightening member 10...regulating frame, 11...guide roller, 12...guide piece, 13...forming frame, 15...inner roller, 16...outer roller, 17...driving mechanism, 18...feed roller, 19...jointing mechanism, 24...gear mechanism, 25...box body, 29, 30, 31...shaft portion, 32, 32, 33...gear, 36...feed roller drive shaft, 37...inner gear, 38...outer gear, 70...mesh plate, 72 (72A, 72B)...holding base, 100...belt-shaped member, 100A, 100B...joint (joint), 120...plastic deformation material

Claims

1. A lining method using a pipe making device for forming a lining pipe having a rectangular cross section similar to the cross section of a pipe by spirally winding a strip-shaped material that is continuously fed into the pipe, the method comprising the steps of: In the lining construction method for a pipe, after forming the lining pipe to a predetermined length, a backfill layer is formed by injecting cement milk into a gap between the inner wall surface of the pipe and the outer surface of the lining pipe, including the bottom portion, on all four sides of the gap, As the unit length of the lining pipe is formed, the tip of the lining pipe is lifted up, and a raising member mainly made of a lattice-shaped reinforcing bar is inserted and installed on the bottom surface of the culvert between the lower surface of the lining pipe and the bottom surface of the culvert, Then, the tip of the lining pipe is pulled down to form a unit length of the lining pipe again. A lining construction method for inside a pipe, comprising the steps of:

2. A lining method using a pipe making device for forming a lining pipe having a horseshoe-shaped cross section similar to the cross section of a pipe by spirally winding a continuously fed strip-shaped material in a pipe having a horseshoe-shaped cross section, comprising: In the lining construction method for a pipe, after forming the lining pipe to a predetermined length, a backfill layer is formed by injecting cement milk into a gap between the inner wall surface of the pipe and the outer surface of the lining pipe, including the bottom portion, on all four sides of the gap, As the unit length of the lining pipe is formed, the tip of the lining pipe is lifted up, and a raising member mainly made of a lattice-shaped reinforcing bar is inserted and installed on the bottom surface of the culvert between the lower surface of the lining pipe and the bottom surface of the culvert, Then, the tip of the lining pipe is pulled down to form a unit length of the lining pipe again. A lining construction method for inside a pipe, comprising the steps of:

3. 3. The method for lining a pipe or conduit according to claim 1 or 2, wherein the raising member is a mesh plate having reinforcing bars arranged in a lattice pattern.

4. 3. The method for constructing a lining inside a piping as claimed in claim 1 or 2, wherein the raising member is formed by attaching a support stand for supporting a mesh plate to a mesh plate which is made of reinforcing bars arranged in a lattice pattern.

5. The elevation member is a mesh plate made of reinforcing bars arranged in a lattice pattern.

3. A raising member used in the lining construction method for the inside of a pipe according to claim 1 or 2.

6. The raising member is formed by attaching a support stand for supporting a mesh plate to a mesh plate made of reinforcing bars arranged in a lattice shape.

3. A raising member used in the lining construction method for the inside of a pipe according to claim 1 or 2.

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