Lining construction method in an existing pipe channel involving a heaving process and its heaving member

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 construction method for manufacturing a lining pipe by winding a long plate-shaped belt member spirally in a conduit to form a lining pipe and using a pipe manufacturing device that self-propels (self-propels). More specifically, a belt member having joints formed at both side edges is used, and a joining mechanism portion including an inner surface roller and an outer surface roller is arranged in a flexible forming frame having a predetermined closed shape. The present invention relates to a lining construction method in a conduit using a conduit lining pipe manufacturing device that forms a lining pipe by spirally winding the belt member by the sandwiching and joining function of the inner surface roller and the outer surface roller. In the conduit lining pipe manufacturing device, a belt member provided with plastic deformability is used, and the forming frame moves along a regulating frame having a predetermined shape and having rigidity via a guide, and adopts a mode of obtaining a lining pipe having a shape similar to the cross section of the conduit.

Background Art

[0002] In recent years, in the lining construction in this conduit, in order to enhance earthquake resistance, a construction of arranging a backfill concrete layer (hereinafter simply referred to as "backfill layer") having a predetermined thickness around the entire circumference has been carried out. And in the construction of the bottom backfill layer, concrete for the backfill material is placed before the pipe manufacturing process, and after waiting for its solidification, a pipe manufacturing device is arranged, and a lining pipe, so-called a rehabilitated pipe, is manufactured. However, in the concrete placement before this pipe manufacturing process, since the distance between the upper surface of the concrete and the top of the existing pipe, that is, the height of the conduit, becomes short, the diameter (the maximum width of the machine) of the pipe manufacturing device installed in the space is reduced. As a result, the height dimension of the lining pipe formed by the pipe manufacturing device is reduced by the thickness of the leading edge. As a result, due to the reduction in the diameter of the cross section of the formed lining pipe, problems such as a decrease in the flow rate flowing in the lining pipe and an increase in the construction cost due to an increase in the backfill material are pointed out.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] In view of the above circumstances, the present invention aims to improve the above-described conventional construction method (concrete placement before the pipe manufacturing process), ensure a backing layer of a predetermined thickness, and enable the construction of a lining pipe of a desired diameter by arranging a pipe manufacturing device that does not involve a reduction in cross-sectional diameter. The present invention aims to obtain a lining construction method and construction tools and members (specifically, a lifting member) used for implementing the lining construction method.

Means for Solving the Problems

[0005] The lining construction method in an existing pipe channel involving a lifting process and the lifting member of the present invention specifically adopt the following configurations. (First Invention) The first aspect of the present invention relates to a lining construction method in a pipe channel. As described in claim 1, In a pipe channel P having a rectangular cross-sectional shape, a lining construction method performed by a pipe manufacturing device S that spirally winds a belt-like member 100 continuously fed out to form a lining pipe R having a rectangular cross-section similar to the pipe channel cross-section, After forming the lining pipe R into a predetermined length, in the lining construction method in a pipe channel in which a backing layer is formed by injecting cement milk into the four-week gap including the bottom between the inner wall surface of the pipe channel P and the outer surface of the lining pipe R, With the formation of the unit length at the tip of the lining pipe R, the pipe manufacturing device S and the tip of the lining pipe are lifted up. A lifting member K mainly composed of a lattice-shaped reinforcing bar group is inserted and installed on the bottom surface of the pipe channel P between the lower surface of the lining pipe R and the bottom surface of the pipe channel P, After that, The tip of the lining pipe R is lowered together with the pipe manufacturing device S. The unit length of the lining pipe R is formed again, which is characterized by the above. (Second Invention) The second aspect of the present invention also relates to a lining construction method in a conduit, and as described in claim 2, having a horseshoe cross-sectional shape Pipe channel P inside, continuously fed Strip-shaped member 100 is spirally wound to form a horseshoe cross-section similar to the conduit cross-section Lining pipe R is formed Pipe manufacturing device S by a lining construction method performed by the Lining pipe R is formed into a predetermined length, and then the Pipe channel P inner wall surface of the Lining pipe R and the outer surface of the With the formation of the unit length at the tip of the lining pipe R, the pipe manufacturing device S and the tip of the lining pipe R are lifted up. the Lining pipe R lower surface of the Pipe channel P and the bottom surface of the Pipe channel P a grid-like reinforcing bar assembly mainly on the bottom surface of the Lifting member K is inserted and installed, and then, The tip of the lining pipe R is lowered together with the pipe manufacturing device S. again the Lining pipe R unit length is formed, which is characterized in that. In the above, 1. "The pipe manufacturing device S that forms the lining pipe R with a rectangular cross-section similar to the conduit cross-section by spirally winding the continuously fed strip-shaped member 100" is a pipe manufacturing device having pipe manufacturing elements such as a forming frame, a regulating frame, a joining mechanism, etc. 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 manufacturing device at its tip, and is determined by the construction conditions.

[0006] (Function) This construction method is carried out from the initial stage of formation at the pipe opening of the lining pipe R. As the unit length of the lining pipe R is formed, the lifting member K is inserted and installed, and this process is repeated to form a lining pipe R of a predetermined length. When the formation of the lining pipe R in the construction section is completed, the lifting member K is installed in the entire section. Thereafter, the front and rear ends of the lining pipe R are sealed, and cement milk is injected into the gap around the pipe trench P and the lining pipe R to construct the backfill layer.

[0007] (Third and Fourth Inventions) The third aspect of the present invention relates to a jacking member used in a lining construction method in a pipe trench. As described in claim 5, the jacking member K is a mesh plate 70 forming a reinforcing bar assembly assembled in a lattice shape, which is characterized in that. The fourth of the present invention is also Relating to a jacking member used in a lining construction method in a pipe trench. As described in claim 6, the jacking member K is formed by attaching a holding base 72 for supporting the mesh plate 70 to the mesh plate 70 forming a reinforcing bar assembly assembled in a lattice shape, which is characterized in that.

[0008] (Function) The lining pipe R to be formed is sequentially placed on the mesh plate 70 of the jacking member K having a smooth surface at the bottom, and the load of the lining pipe R is evenly transmitted to the pipe trench P. A backfill layer space with a uniform thickness is obtained by the jacking member K. The filler by the cement milk passes well through the reinforcing bar assembly assembled in a lattice shape to form a homogeneous backfill layer.

Effect of the Invention

[0009] According to the method for constructing a lining pipe in a pipe trench of the present invention, since the pipe manufacturing device forms the lining pipe while traveling on the bottom surface of the existing pipe trench, it is possible to use the pipe manufacturing device with the largest diameter, without reducing the diameter of the construction section, and at the same time, it is also possible to reduce the backfill material to be filled, and lining construction with an economical backfill layer can be carried out. In addition, according to the jacking member used in the present invention, it does not inhibit the inflow of the injected cement milk, and a reliable backfill layer can be constructed. And by using a jacking member with an appropriate height, it is possible to cope with backfill layers of any thickness.

Brief Description of the Drawings

[0010]

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Embodiments for Carrying Out the Invention

[0011] The lining construction method in an existing conduit with a jacking process of the present invention and the embodiments of its jacking members will be described based on the drawings. Figs. 1 to 20 show an embodiment of the present invention and show a lining construction method of a lining pipe (also referred to as a recycled pipe) in a rectangular cross-sectional conduit. That is, Figs. 1 to 4 show the overall schematic configuration of a spiral wound free cross-section pipe-making type lining pipe-making device S (hereinafter abbreviated as "pipe-making device") in the conduit to which this construction method is applied, and Figs. 5 to 13 show the more detailed partial configuration of the lining pipe-making device S. Figure 20 shows an aspect of the strip-shaped member used in the present invention. And Figs. 14 to 19 show the construction procedure of the main part jacking process of the present invention. In these figures, P represents a conduit having a rectangular cross-section, and R represents a lining pipe manufactured by the present pipe-making device S. Note that, with the advancing direction (arrow B) of the lining pipe R manufactured by the present pipe-making device S, the front part and the rear part are defined. In the present embodiment, a pipe channel with a rectangular cross-section is shown. However, the cross-section of the pipe channel is not limited to a rectangular cross-section and may include a horseshoe-shaped cross-section or other shapes. Also, the feeding function (mechanism) of the pipe manufacturing apparatus is shown by a feeding roller, but it is not excluded that other conventionally known mechanisms may be used.

[0012] Strip-shaped member 100 (See FIG. 20) Prior to the description of the configuration of the pipe manufacturing apparatus S, the belt-like member applied to the pipe manufacturing apparatus S will be described. FIG. 20 shows an example of a belt-like member applied to the lining pipe manufacturing apparatus S of the present embodiment. The belt-like member 100 has a flat plate shape with a constant thickness for its main body, and a suitable number (5 in the illustrated example, usually 3) of ridges 102 are continuously provided vertically in the longitudinal direction on the outer surface thereof. A flange 102a is formed at the tip of the ridge 102. A groove 104 or a groove space is formed between the ridges 102. The inner surface 106 is formed substantially smoothly. Joint portions 100A and 100B that overlap and engage with each other inside and outside are formed on both sides of the belt-like member 100. That is, in the front-edge-side joint portion 100A, the base of the ridge 102A at the front end is expanded in diameter, a concave groove 110 is vertically provided from the inner surface side thereof, and an overhanging portion 112 is continuously provided from this ridge 102A. In the rear-edge-side joint portion 100B, an overhanging portion 114 is extended from the ridge 102B at the rear end, and a ridge 116 that engages with the concave groove 110 of the front-edge-side joint portion 100A is vertically provided near the end of the overhanging portion 114. In this belt-like member 100, a plastic deformation material 120 as a plastic deformation functional material made of metal (usually steel) is mounted between the intermediate ridges 102. The plastic deformation material 120 is processed by continuously bending a long metal flat plate in its longitudinal direction. The plastic deformation material 120 is not limited to the position in the illustrated example and may be at other positions or at a plurality of locations.

[0013] Upon joining, the front edge and the rear edge of adjacent strip members 100 overlap, and the rear edge side joint portion 100B is subjected to the clamping action of the outer surface roller and the inner surface roller of the joint roller portion described below on the front edge side joint portion 100A. The ridge 116 is inserted into the concave groove 110, and the end portion of the overhanging portion 112 is respectively fitted into the flange 102a of the ridge 102B and joined. In this case, the main engagement is made by the concave groove 110 and the ridge 116, and the overhanging portion 112 and the ridge 102B form a subordinate engagement. Therefore, in some cases, the subordinate engagement can be omitted. Furthermore, in this embodiment, a sealing material 118 is interposed at the contact portion of the overhanging portions 112 and 114 to enhance the joining property. If the fitting engagement at the joint portions 100A and 100B is sufficient, the sealing material 118 can be omitted. The strip member is made of a synthetic resin material, and vinyl chloride (PVC) resin that can be continuously formed by extrusion is particularly suitable from the viewpoint of moldability.

[0014] In-pipe-lining pipe manufacturing device S (See FIGS. 1 to 13) As shown in FIGS. 1 to 4, this construction device S mainly includes a rigid regulating frame 10 having a rectangular shape, and a flexible forming frame 13 that is disposed around the outer periphery of the regulating frame 10 movably via a guide roller 11 disposed on the outer periphery and a guide member 12. The flexibility of the forming frame 13 allows free outward folding at 180°, and inward folding is restricted by an anti-buckling mechanism. The forming frame 13 is mainly provided with an inner surface roller 15 and an outer surface roller 16 that are attached at a predetermined interval, and a joint mechanism portion 19 including a drive portion 17 that drives the rollers 15 and 16 and a feed roller 18 that is interlocked with the drive portion 17 via a feed mechanism U is fixedly attached. The forming frame 13 receives the driving force from the drive portion 17 by the joint mechanism portion 19, sandwiches the strip member 100 described above, and rotates and advances. In this construction device S, the feed roller 18 is interlocked with the drive portion 17 via the feed mechanism portion U and rotates in the opposite direction to the outer surface roller 16. Furthermore, In this construction device S, an auxiliary roller mechanism T is added via the regulating frame 10.

[0015] Hereinafter, the detailed configuration of the pipe manufacturing apparatus S will be described with reference to FIGS. 5 to 13. Forming frame 13 (See FIGS. 5 to 9) The forming frame 13 forms an annular body with a required width and has a link mechanism composed of a series of link bodies 21 (frame portions 21a and shaft portions 21b), being flexible in the outer diameter direction and having lateral rigidity. The guide rollers 11 are rotatably arranged on the respective shaft portions 21b of the link mechanism of the forming frame 13. The drive portion 17 of the joining mechanism portion 19 is mounted on one attachment portion 21A of the link body 21 of the forming frame 13. (Anti-buckling mechanism) The link bodies 21 can be bent outward with a reference of 180°, but buckling in the middle is prevented. For this reason, an anti-buckling mechanism is provided on the side surface of the frame portion 21a of the link body 21. An example thereof is shown in FIG. 8. In the figure, 22 is a stopper.

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

[0017] Joining mechanism part 19 (See FIGS. 10 to 13) The joining mechanism section 19 includes a joining roller section (including the inner surface roller 15 and the outer surface roller 16), a drive section 17, and a feed roller 18, and is mounted on the mounting section 21A of the molding frame 13. The joining mechanism section 19 mainly consists of a joining roller section in which the inner surface roller 15 and the outer surface roller 16 form a pair, and a box body 25 that houses a gear mechanism 24 for synchronously rotating these rollers 15 and 16, and a hydraulic motor 26 that is attached to the box body 25 and serves as a rotation drive source for the rollers 15 and 16. The joining mechanism section 19 is arranged corresponding to the joining portion of the belt-like member 100 wound in a spiral shape, that is, the position where the belt-like member 100 first closes. The gear mechanism 24, the box body 25, and the hydraulic roller 26 constitute the drive section 17, and the feed roller 18 is interlocked with the drive section 17 via a feed mechanism U. Note that the inner surface roller 15 is mounted on the shaft portion 21b of the link body 21 of the molding frame 13 in the same manner as the guide roller 11.

[0018] (Box body 25) As shown in FIG. 10, the box body 25 is divided into an upper portion and a lower portion. The upper portion can be opened around the pin shaft 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 portions of the feed roller 18 on its front and rear surfaces over the upper and lower portions. Further, in the lower portion of the box body 25, the front surface portion serves as a mounting portion for the hydraulic motor 26, and the rear surface portion is attached to the shaft portion 21b of the link body 21 of the mounting portion 21A of the molding frame 13.

[0019] (Gear mechanism 24) As shown in FIG. 11, the gear mechanism 24 has three shaft portions 29, 30, and 31 that are rotatably spanned in sequence from below across the front and rear walls of the box body 25, and gears 32, 33, and 34 are fixed to the respective shaft portions 29, 30, and 31. Then, the inner surface roller 15 of the joining roller section is connected to the second shaft portion 30, and the outer surface roller 16 is connected to the third shaft portion 31. As shown in the figure, the second shaft portion 30 rotates in the reverse direction and the third shaft portion 31 rotates in the forward direction with respect to the rotation of the first shaft portion 29, and thus the inner surface roller 15 and the outer surface roller 16 rotate in opposite directions to each other.

[0020] (Feed roller 18, Feed mechanism U) As shown in FIGS. 10, 11, 12, and 13, the feeding mechanism U mainly includes a feeding roller 18, a feeding roller drive shaft 36 pivotally supported above the box body 25 (outside the pipe diameter), an (inner) gear 37 fixed to the third shaft portion 31, and an (outer) gear 38 fixed to the feeding roller drive shaft 36 and meshing with the gear 37. The feeding roller 18 is fixed to the feeding roller drive shaft 36 extending outside the box body 25. More specifically, the third shaft portion 31 is the original shaft of the feeding roller mechanism U. The feeding roller drive shaft 36 is arranged as a secondary shaft outside and parallel to the original shaft 31, and is arranged behind the original shaft 31 with respect to the advancing direction of the joining mechanism portion. Also, the inner gear 37 has a small diameter at the pitch circle, the outer gear 38 meshing with the inner gear 37 has a sufficiently large diameter at the same pitch circle, and the diameter of the feeding roller 18 is slightly larger than the diameter of the outer gear 38. Incidentally, the diameter of the pitch circle of the inner gear 37 is smaller than the diameter of the portion where the outer surface roller 16 presses against the flange 102a of the ridge 102 of the belt member 100 (this portion is subjected to knurling to prevent slipping). Thereby, the peripheral speed (feeding speed) of the feeding roller 18 coincides (synchronizes) with the feeding speed of the outer surface roller 16 (i.e., the forming speed of the lining pipe).

[0021] (Hydraulic motor 26) The hydraulic motor 26 has its drive shaft connected to the first shaft portion 29 and is attached to the front surface of the box body 25. An in-side pipe 41a for sending 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. Further, these pipes 41 are connected to a rotary joint 42 (see FIG. 3) attached at 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. By means of this rotary joint 42, the working fluid is exchanged between the pipe 41b on the side of the hydraulic motor 26 involving a rotational operation and the external side pipe 43 without a rotational operation. By means of this gear mechanism 24 and hydraulic motor 26, the driving force of the hydraulic motor 26 is transmitted to the first shaft portion 29 and, via the gear mechanism 24, to the second and third shaft portions 30, 31. Furthermore, in the feeding mechanism U, the rotational driving force of the third shaft portion (original shaft) 31 rotates the internal gear 37 integrally, rotates the external gear 38 meshing with the internal gear 37 and the feed roller drive shaft (secondary shaft) 36 in the reverse 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 secondary shaft 36, and as a result, the feed roller 18 is rotated in the direction opposite to the outer surface roller 16.

[0022] The attachment of this joining mechanism portion 19 to the lining pipe R is performed by opening the upper portion of the box body 25 at the front end of the already formed lining pipe R, matching the pitch of the annular flange portion of the outer surface roller 16 with the pitch of the protrusion 102 of the strip member 100, then closing the upper portion to the lower portion, closing the closing device 27, and tightening its nut.

[0023] Regulating frame 10 and guide 12 (See FIGS. 5 and 6) (Regulating frame 10) The regulating frame 10 is made of steel, has great rigidity, and has a rectangular overall shape. In this embodiment, a steel section having a hollow groove 45 is used, and the groove 45 opens outward. Note that the regulating frame 10 is assembled with split bodies. (Guide 12) The guide 12 is interposed between the forming frame 13 and the regulating frame 10, and guides the movement of the forming frame 13 according to the track of the regulating frame 10. More specifically, the guide 12 has bearing bodies 46 pivotally attached to the shaft portion 21b of the forming frame 13 at both ends of the bifurcated main body, a roller holder 47 extends inward from the central portion of the main body, and a rotating shaft 49 with rollers 48 attached to both sides is rotatably held by the roller holder 47. And this roller 48 is inserted into the groove 45 of the regulating frame 10 and moves along its inner wall.

[0024] Auxiliary roller mechanism T (See FIGS. 2 and 3) Furthermore, an auxiliary roller mechanism T is added to the lining construction device S via the regulating frame 10. That is, the auxiliary roller mechanism T is provided at four corner portions of the rectangular regulation frame 10, extends rearward in the pipe axis direction via the frame portion 58, and presses the inner surface of the lining pipe R immediately after being wound against the outer side by the roller 59 rotatably attached to the rear end of the frame portion 58.

[0025] With the above configuration, the pipe manufacturing apparatus S constructs the lining pipe as follows. That is, the forming frame 13 with the guide roller 11 and the joining mechanism portion 19 assembled thereon advances circumferentially along the shape of the regulation frame 10 that maintains the same phase with respect to the pipe cross-section by the drive of the drive portion 17. At this time, the plastic deformable belt-like member 100 is wound in a spiral shape by the joining mechanism portion 19 to manufacture the rectangular lining pipe R, and the feed roller 18 abuts against the pipe wall of the pipe conduit P and smoothly propels the construction apparatus S by its rotation. Further, as the forming frame 13 advances, the regulation frame 10 obtains the extrusion force from the forming frame 13 via the guide 12 and advances together with the forming frame 13. In the auxiliary roller mechanism T, the contact roller 58 is strongly pressed against the inner surface of the lining pipe R, and the shape of the initial lining pipe is maintained at a position near the rear of the forming frame 13. As a result, the regulation frame 10 is self-supportingly held and does not cause co-rotation with the forming frame 13, and advances smoothly.

[0026] Lining construction The lining construction work in the pipe conduit with a heaving process using the in-pipe lining pipe manufacturing apparatus S will be described. The essentials of the construction work in the sewer pipe conduit are shown based on FIGS. 14 to 19. This construction work shows an application example to a sewer pipe conduit P having a rectangular cross-section. FIG. 19 shows the longitudinal cross-sectional structure of the sewer pipe conduit P after the completion of the work, that is, after the backfill material is filled. 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 conduit P is buried. In this construction work, the construction is carried out from the upstream manhole Q1 side toward the downstream manhole Q2 side. In the above-ground part, a feeding device (not shown) for the strip-shaped member 100 is installed on the upstream side, and the strip-shaped member 100 is continuously supplied by this feeding device into the pipe manufacturing device S installed in the manhole Q1 from the opening O1 of the manhole. Also, a hydraulic power source (not shown) is arranged on the downstream side.

[0027] The lining construction in the pipe channel is carried out based on the following procedure. (1) Preparation and initial operation process (1a) Preparation process This lining pipe manufacturing device S is carried into the manhole through the opening O1 of the upstream manhole Q1 of the rectangular cross-section pipe channel P to be regenerated in a disassembled state, and the pipe manufacturing device S is assembled in the manhole Q1. The forming frame 13 of the pipe manufacturing device S can be disassembled and assembled, and the regulating frame 10 is also composed of divided bodies, making it easy to carry into the manhole. Furthermore, the joining mechanism part 19 can be attached to this forming frame 13, and it is also easy to install on-site. The feed roller 18 and the feed mechanism U are incorporated into this joining mechanism part 19, and the installation of the feed roller 18 and the feed mechanism U is carried out together with the assembly of the joining mechanism part 19. The forming frame 13 is constrained by the regulating frame 10 via the guide 12 and is arranged in a rectangular shape around the regulating frame 10. A hydraulic piping system arranged from the downstream side is connected to the joining mechanism part 19. Furthermore, an auxiliary roller mechanism T is attached to the regulating frame 10 of the pipe manufacturing device S, and at each corner of the regulating frame 10, the contact roller 59 of the auxiliary roller mechanism T is pulled inward. At this time, the pipe manufacturing device S is selected to occupy as much as possible of the pipe channel cross-section within the range that satisfies the design conditions. And also, the members and construction equipment (lifting members K, jacks, etc.) used in the lifting process (described later) are carried into the pipe channel P. (1b) Initial operation process The strip member 100 incorporated with the plastic deformation material 120 is drawn into the conduit P from the manhole and introduced into the joining mechanism portion 19 of the lining construction device S. By driving the joining mechanism portion 19, the strip member 100 is wound around the forming frame 13 having a rectangular shape. At each corner of the regulating frame 10 and thus at each corner of the forming frame 13, the strip member 100 is bent at a right angle by the plastic function of the plastic deformation material 120. The strip members 100 that abut on each other during the second winding of the strip member 100 are joined by their joints. The strip 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 strongly pressed against the inner surface of the initial lining pipe Ro and fixed to hold the cross-sectional shape of the initial lining pipe Ro in the initial state of the forming frame 13. Subsequent to this initial operation step, the following (2) steady state step, (3) lifting step, and (3a) initial work are performed. In some cases, the lifting member K is not installed in this step. That is, it is also possible to lift the lining pipe end facing the pipe opening of the initial lining pipe Ro from the bottom of the conduit P and insert and install the lifting member K from the pipe opening.

[0028] (2) Steady state step By the rotational drive of the inner and outer surface rollers 15 and 16 of the joining mechanism portion 19, with the clamping action between the inner surface roller 15 and the outer surface roller 16, at the closing portion of the strip member 100, the strip member 100 newly supplied in continuation with the starting lining pipe Ro by its joint structure is joined. Furthermore, due to the driving of the joining mechanism portion 19 of the construction device S, the forming frame 13 assembled with the guide roller 11 and the joining mechanism portion 19 advances along the shape of the regulating frame 10 via the guide element 12. At the corners of the regulating frame 10, the joining roller portions 15, 16 of the joining mechanism portion 19 fold the strip-shaped member 100 inward. The strip-shaped member 100 has plastic deformability and retains the bent state as it is. Also, the feed roller 18 rotates in a direction opposite to that of the outer surface roller 16 in conjunction with the joining mechanism portion 19, abuts against the pipe wall of the pipe channel P, and rotates the device S by receiving the reaction force from the pipe wall. Then, the entire pipe manufacturing device S rotates and moves in the circumferential direction (A direction) of the pipe and advances in the pipe axis direction (B direction). As a result, the strip-shaped member 100 is wound in a spiral shape, and a rectangular lining pipe R is manufactured.

[0029] (2a) In this process, the feed roller 18 and the feed mechanism U perform the following actions. That is, the feed mechanism U incorporated in the joining mechanism portion 19 causes the feed roller 18 to rotate in a direction opposite to the rotation of the outer surface roller 16 due to the meshing of its gears (inner gear 37, outer gear 38). When the joining mechanism portion 19 of the forming frame 13 that moves around the regulating frame 10 reaches the pipe bottom (the pipe bottom of the pipe channel P), the feed roller 18 abuts against the pipe bottom surface of the pipe channel P, and by its rotation, receives the reaction force from the pipe bottom surface and moves (in the A direction) the forming frame 13 and thus the entire device S along the pipe channel bottom surface. At this time, the circumferential rotation speed of the feed roller 18 is synchronized with the moving speed of the joining mechanism portion 19 (in other words, the forming speed of the lining pipe R), and the bottom (and side portions) of the lining pipe R are formed smoothly.

[0030] (2b) Furthermore, in this step, the regulation frame 10 and the forming frame 13 maintain their relative positions (phases) independently of each other by means of the auxiliary roller mechanism T attached to the regulation frame 10, without mutual interference or rotation between the two frames 10 and 13, and the movement of the guide 12 interlocked with the forming frame 13 is smoothly performed. That is, there is no rubbing or single-sided contact during the circumferential movement of the main body of the guide 12 in the groove 45 of the regulation frame 10, and the circumferential movement is smoothly carried out.

[0031] (3) Lifting step In the steady step following the above-described starting step, a lifting member K is installed between the bottom surface of the lining pipe R and the bottom surface of the pipe channel P for each unit length of the lining pipe R (in the case of construction in a large cross-section pipe channel, for example, 1m to 1.2m), that is, the lifting step is carried out. (Lifting member K) The detailed structure of the lifting member K is shown in FIGS. 14 to 16. This lifting member K is composed of a mesh plate 70 and a holding base 72, and as a whole, it has a predetermined length in width (in the case of construction in a large cross-section pipe channel (the same hereinafter), for example, 1500 mm), length in the longitudinal direction (for example, 500 mm), and height (for example, 30 mm), and is installed side by side in the front-rear direction (pipe axis direction) on the bottom surface of the pipe channel P. However, there is a mode in which the holding base 72 is removed and the height is low (for example, 10 mm). (Mesh plate 70) (see FIG. 14) The mesh plate 70 is formed by vertically arranging thin round steel bars in a lattice pattern. Vertical bars 70a are arranged at the upper part, and horizontal bars 70b are arranged at the lower part, and the joints are welded to maintain overall rigidity. Now, by adopting thin round steel bars with a diameter of 5 mm, the thickness (height) of the mesh plate 70 becomes 10 mm. If the round steel bars have a diameter of 7 mm, the thickness of the mesh plate 70 is 14 mm, and if the round steel bars have a diameter of 10 mm, the thickness is 20 mm. Also, when the round steel bars with a diameter of 5 mm are arranged in three layers, a mesh plate 70 with a thickness of 15 mm can be obtained, and these correspond to a backfill layer thickness of 10 mm to 20 mm.

[0032] (Holding base 72) (see FIGS. 14, 15, and 16) The retaining base 72 is assembled by reinforcing bar processing, fitted and assembled to the mesh plate 70, and fixedly supports the mesh plate 70 from below. An example embodiment of the retaining base 72A is shown in Fig. 14 (and Fig. 16), and the retaining base 72B is shown in Fig. 15. The retaining base 72B shown in Fig. 15 is formed by bending two thin-diameter round steel bars into an Ω (omega) shape, and includes support members 72a arranged in parallel with a predetermined interval, and reinforcing bar receiving members 72b of a predetermined length that are welded and fixed in parallel on the upper surfaces of the support members 72a. The two support members 72a take an interval of, for example, 50 mm, and the two reinforcing bar receiving members 72b take a length of, for example, 70 mm. More specifically, the support member 72a formed by bending the round steel bar into an Ω shape includes horizontal leg portions 721 on both sides, column portions 722 rising from the horizontal leg portions 721, and upper beam portions 723 connecting the upper ends of the column portions 722. The horizontal leg portions 721 abut on the bottom surface of the conduit P, and the above-described reinforcing bar receiving member 72b is placed and fixed on the upper beam portion 723. The support member 72a has a height h (Fig. 15(a)), and the thickness of the lifting member K can be freely determined. The reinforcing bar receiving member 72b forms a groove, that is, a reinforcing bar receiving portion 73, according to the interval between two straight reinforcing bars arranged in parallel, and the vertical bars 70a of the reinforcing bar, that is, the mesh plate 70, are fitted and held in the reinforcing bar receiving portion 73. Fig. 16 shows the details of the retaining base 72A (the same reference numerals are given to the members equivalent to those in Fig. 15 in the figure). The retaining base 72A adopts an embodiment in which a square frame-shaped restraint frame 74 made of round steel is welded and fixed around the column portion 722 at the lower part of the column portion 722 of the retaining base 72B, whereby the retaining base 72 obtains high rigidity.

[0033] (Assembly of the mesh plate 70 and the retaining base 72) The retaining base 72 (72A, 72B) sandwiches the vertical bars 70a of the mesh plate 70 by its reinforcing bar receiving portion 73, and holds the mesh plate 70 from below. A number of retaining bases 72 are attached to the mesh plate 70 to stably support the lifting member K. (Mode of use) This lifting member K is used with its usage mode changed according to the thickness of the backfill layer at the bottom of the applied or designed lining pipe R and also in accordance with the design conditions. That is, 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 (more than 20 mm), the holding base 72 is attached to the mesh plate 70 for use. Further, a support member 72a of the holding base 72 with an appropriate height (h) is used, corresponding to the thickness of the backfill layer.

[0034] (3a) Initial work In the initial operation of pipe production (see (1b)), after producing an initial lining pipe Ro of a predetermined length, the pipe production operation is temporarily stopped. Then, in accordance with the lifting operation described in (3c) below, the lining pipe Ro is lifted together with the pipe production device S, and the lifting member K is inserted and installed up to the rear end of the lining pipe Ro (that is, the pipe orifice part of the pipe channel P). Thereafter, by lowering the pipe production device S and the lining pipe Ro, the pipe production device S (when its joining mechanism part 19 is downward) is placed on the bottom surface of the pipe channel P, and the lining pipe Ro is placed on the upper surface of the lifting member K. Note that this operation can be substituted for the installation operation of the lifting member K described in the previous initial operation (1b).

[0035] (3b) Pipe production operation Following the initial operation in (3a) above, the steady process described in (2) above is carried out over a predetermined length (about 1.0 m to 1.2 m). That is, initially, the bottom surface part at the tip of the lining pipe R produced by the pipe production device S takes the same height as the upper surface of the lifting member K. However, when the joining mechanism part 19 of the pipe production device S is separated from the bottom surface of the pipe channel P (that is, when it is on the side and above the pipe channel P), as the pipe production device S advances, that is, as the lining pipe R is formed, the tip part of the lining pipe R gradually hangs downward, and when it exceeds a certain length, the tip part comes into contact with the bottom surface of the pipe channel P (Figure 16(a) shows this state).

[0036] (3c) Lifting and lowering operations and installation operation of the lifting member K After that, lift the pipe manufacturing device S and insert and install the lifting member K. A predetermined device or tool (member) is used for the insertion and installation of the lifting member K. (1) As shown in FIGS. 17(a) and 17(b), a lifting device 75, a lifting member K, and its (shown in FIG. 18) are prepared facing the pipe manufacturing device S. First, the lifting device 75 is installed on the lower surfaces on both sides of the pipe manufacturing device S. The contact of the lifting device 75 with the pipe manufacturing device S is made to contact the straight portion at the bottom of the lining pipe R, avoiding the circular curved portion (rounded portion) at the corner of the lining pipe R. Pusher (rod) 80 (As shown in FIG. 18), the lifting device 75 is installed on the lower surfaces on both sides of the pipe manufacturing device S. The contact of the lifting device 75 with the pipe manufacturing device S is made to contact the straight portion at the bottom of the lining pipe R, avoiding the circular curved portion (rounded portion) at the corner of the lining pipe R. In this embodiment, an air jack is used for the lifting device 75 (75a is an air bag, and 75b is a pneumatic pipe 75b), but hydraulic jacks and other lifting devices with a jacking function are not excluded. These are installed in a narrow working space and exhibit sufficient lifting capacity. (2) Next, as shown in FIGS. 18(a) and 18(b), operate (jack up) the lifting device 75 to lift the tip of the lining pipe R to the upper surface (ceiling surface) of the pipe channel P or the vicinity thereof. In this state, using the lifting member K as an insertion tool, Pusher (rod body) 80 insert it manually below the lining pipe R. Then, push the lifting member K in the direction of H (FIG. 18(a)) until it contacts the previously installed lifting member K using. The newly pushed-in and installed lifting member K has a slight gap space with the lower surface of the lining pipe R in this state. Pusher 80 push it in the H direction (FIG. 18(a)) using until it contacts the previously installed lifting member K. The newly pushed-in and installed lifting member K has a slight gap space with the lower surface of the lining pipe R in this state. (3) After that, lower the lifting device 75 to lower the pipe manufacturing device S, remove the lifting device 75, and place the entire lining pipe R except for the pipe manufacturing device S part on the lifting member K. Then, perform pipe manufacturing again over a slightly longer length (about 500 mm) to extend the lining pipe R. This extension operation leads to the step of (3b). Note that this extension operation may be omitted and directly connected to the step of (3b).

[0037] (3d) Repetition step Repeat the operations / steps (3b) and (3c) to install the lining pipe R until it reaches a predetermined position (usually the pipe opening of the manhole on the downstream side).

[0038] (4) When the lining pipe R reaches the manhole on the downstream side, stop the drive of the lining pipe manufacturing device S, and disassemble and remove the pipe manufacturing device S through the downstream manhole Q2.

[0039] (5) As shown in Fig. 19, install a support H for imparting rigidity to the lining pipe R inside the lining pipe R, and further install a reaction member I for pushing down the lining pipe R against the buoyancy caused by the injection of the consolidation backfill material M to be carried out in the next process. Note that the support H forms a frame and has its own rigidity, is installed in close contact with the inner surface of the lining pipe R, and prevents the deformation of the lining pipe R showing flexibility. The reaction member I is an extensible rod-shaped body, the lower end abuts against the bottom of the lining pipe R, the upper end penetrates the ceiling of the lining pipe R, the upper end surface abuts against the ceiling surface of the pipe channel P, the rod-shaped body is extended, and the lining pipe R is pushed down with the pushing force.

[0040] (6) At each manhole Q1, Q2, as further shown in Fig. 19, seal V between the pipe channel P and the lining pipe R, inject a consolidation backfill material (so-called cement milk) M into the gap around the circumference of the pipe channel P and the lining pipe R over the entire length of the pipe channel P, wait for its consolidation, remove the support H, the reaction member I, etc., and the lining construction work is completed.

[0041] (Aspects of the Embodiment) In the above-described embodiment, the feed rollers 18 and the feed mechanism U are adopted for the feed function of the pipe manufacturing device S, but it does not prevent the adoption of other known feed mechanisms. For example, those disclosed in the applicant's Japanese Patent Application Laid-Open Nos. 2015-112834, 2003-175547, 2003-33969, etc. may also be used. In the present invention, the feed rollers 18 and the feed mechanism U are not essential matters. In addition, in the pipe manufacturing apparatus S of the present embodiment, the auxiliary roller mechanism T is added, but it may be omitted. In the present invention, the auxiliary roller mechanism T is not an essential matter.

[0042] (Effect of the embodiment) According to the lining construction form in the existing pipe channel with the heaving process of this embodiment, the pipe manufacturing operation by the pipe manufacturing apparatus S is carried out in the original space while maintaining the cross-sectional space of the existing pipe channel P, without being forced to reduce the size of the pipe manufacturing apparatus S brought in as in the conventional method (i.e., pre-casting). Therefore, the maximum molding of the lining pipe can be achieved, and a backfill layer with a predetermined thickness can be ensured. Thereby, an increase in the flow rate of sewage can be achieved, and further, a reduction in the amount of concrete used for the backfill layer can be achieved, enabling economical construction. In addition, the heaving member K allows for good inflow and filling of the backfill cement milk at the bottom of the pipe channel P, and also exhibits a reinforcing effect, ensuring the construction of the backfill layer at the bottom of the pipe channel P. Furthermore, the heaving member K can be adapted to backfill layers of any thickness by using only the mesh plate 70, using a combination of the mesh plate 70 and the holding base 72, or further using the holding base 72 with an appropriate height h.

[0043] The present invention is not limited only to the above-described embodiment, and various design changes are possible within the scope of the basic technical idea of the present invention. That is, the following aspects are included within the technical scope of the present invention. 1) In the previous embodiment, the construction mode for a pipe channel with a rectangular cross-sectional shape was shown, but it can also be applied to pipe channels with other cross-sectional shapes, such as a horseshoe shape, an oval shape, or even a circular shape. Figure 21 shows the application to a pipe channel P with a horseshoe-shaped cross-section. In the figure, the same members as those in the previous embodiment are given the same reference numerals. Also, in the following description, the same reference numerals are used for members equivalent to those in the previous embodiment. In this embodiment, the regulating frame 10 (not shown) in the pipe manufacturing apparatus S (not shown) has a shape similar to that of the pipe channel P, and the lining pipe R made of the plastic strip member 100 is formed along this regulating frame 10. The figure shows a state where the joining mechanism portion 19 in the pipe manufacturing apparatus S is on the side surface of the pipe channel P having a horseshoe-shaped cross section (therefore, the tip of the lining pipe R abuts on the bottom surface of the pipe channel P). A raising member K (not shown) is laid between the bottom surface of the pipe channel P and the bottom surface of the lining pipe R. When the lining pipe R is lifted during the laying operation, the top of the lining pipe R abuts on the top of the pipe channel P or has a slight gap. 2) Regarding the drive source, in this embodiment, a hydraulic type is adopted, but it may be driven by pneumatic pressure or electric power.

Explanation of reference numerals

[0044] S... Pipe channel lining pipe manufacturing apparatus, P... Pipe channel, R... Tubular body (lining pipe), K... Raising member 10... Regulating frame, 11... Guide roller, 12... Guide, 13... Forming frame, 15... Inner surface roller, 16... Outer surface roller, 17... Drive mechanism, 18... Feed roller, 19... Joining mechanism portion, 24... Gear mechanism, 25... Box body, 29, 30, 31... Shaft portions, 32, 32, 33... Gears, 36... Feed roller drive shaft, 37... Internal gear, 38... External gear, 70... Mesh plate, 72(72A, 72B)... Holding table, 100... Strip member, 100A, 100B... Joint portion (joint), 120... Plastic deformation material

Claims

1. A lining construction method performed by a pipe manufacturing apparatus that forms a lining pipe with a rectangular cross section similar to the cross section of a conduit by spirally winding a strip-shaped member continuously fed out in a conduit having a rectangular cross section, In the lining construction method in the conduit, after forming the lining pipe to a predetermined length, a backfill layer is formed by injecting cement milk into the four-week gap including the bottom of the inner wall surface of the conduit and the outer surface of the lining pipe. As the unit length at the tip of the lining pipe is formed, the pipe manufacturing apparatus and the tip of the lining pipe are lifted, and a lifting member mainly composed of a lattice-shaped reinforcing bar group is inserted and installed on the bottom surface of the conduit between the lower surface of the tip of the lining pipe and the bottom surface of the conduit. Thereafter, the tip of the lining pipe is lowered together with the pipe manufacturing apparatus, and the unit length of the lining pipe is formed again. A lining construction method in a conduit, characterized by the above.

2. A lining construction method performed by a pipe manufacturing apparatus that forms a lining pipe with a horseshoe-shaped cross section similar to the cross section of a conduit by spirally winding a strip-shaped member continuously fed out in a conduit having a horseshoe-shaped cross section, In the lining construction method in the conduit, after forming the lining pipe to a predetermined length, a backfill layer is formed by injecting cement milk into the four-week gap including the bottom of the inner wall surface of the conduit and the outer surface of the lining pipe. As the unit length at the tip of the lining pipe is formed, the pipe manufacturing apparatus and the tip of the lining pipe are lifted, and a lifting member mainly composed of a lattice-shaped reinforcing bar group is inserted and installed on the bottom surface of the conduit between the lower surface of the tip of the lining pipe and the bottom surface of the conduit. Thereafter, the tip of the lining pipe is lowered together with the pipe manufacturing apparatus, and the unit length of the lining pipe is formed again. A lining construction method in a conduit, characterized by the above.

3. The lining construction method in a conduit according to claim 1 or 2, wherein the lifting member is a mesh plate formed of a lattice-shaped reinforcing bar group.

4. The lining construction method in a conduit according to claim 1 or 2, wherein the lifting member is formed by attaching a holding base for supporting the mesh plate to a mesh plate formed of a lattice-shaped reinforcing bar group.

5. The lifting member is a mesh plate formed of a lattice-shaped reinforcing bar group. A lifting member used in the lining construction method in a conduit according to claim 1 or 2, characterized by the above.

6. The raised member is formed by attaching a holding base for supporting a mesh plate to a mesh plate forming a reinforcing bar assembly assembled in a lattice shape. The raised member used in the lining construction method in a conduit according to claim 1 or 2, characterized in that.

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