JP7367953B2 - Repair formwork for slab type track and filling layer repair method for slab type track using the same - Google Patents

Description

The present invention relates to a repair formwork for a slab type track and a filling layer repair method for a slab type track using the same, and more specifically, to a repair method for defining a space into which filler material is loaded when repairing a filling layer. Formwork and its repair This article relates to a filling layer repair method for slab type track using the formwork.

A slab type track for railways in which a filling layer of CA mortar (cement asphalt mortar) is provided between the concrete roadbed and a concrete track slab placed above it, and the rails are fastened to the track slab. is known (for example, Patent Document 1).

The outer peripheral part where the filling layer made of CA mortar is exposed to the outside deteriorates over time, and also deteriorates quickly due to freeze damage caused by repeated freezing and thawing of moisture that has seeped into the filling layer, so the outer peripheral part is exposed to the outside in a relatively short period of time. Repairs are required. Repairs to the outer periphery of the filling layer are carried out using the formwork injection method, in which repair material is poured into the erected formwork. The filling material used for repair is mainly resin, and the formwork is generally made of wood.

However, when using wooden formwork, there are problems such as poor transportability and construction efficiency, cumbersome handling, and lack of safety. As a construction method that can solve such problems, the applicant has proposed a bag body made of a flexible material that is installed around the outer periphery of the gap created between the subgrade concrete and the track slab, and defines an airtight chamber inside. A filler injection cylinder made of a flexible material defines a filler loading passage that passes through the bag in the lateral direction, and is elastically deformed in a diametrical direction by fluid pressure in an airtight chamber to close the filler loading passage. proposes a repair formwork having the following (Patent Document 2).

Japanese Patent Application Publication No. 2002-167421 Japanese Patent Application Publication No. 2015-168969

However, in the repair formwork described in Patent Document 2, in order to fix the bag made of a flexible material placed between the roadbed concrete and the track slab, the bag is inflated and its lower surface is attached to the upper surface of the roadbed concrete. It is necessary to press the top surface of the bag against the bottom surface of the track slab. Therefore, the work of installing and removing the formwork is complicated. Furthermore, a space for placing the formwork is required at the outer periphery of the gap created between the roadbed concrete and the track slab, and this area cannot be filled with repair material.

In view of this background, it is an object of the present invention to repair the filling layer more quickly and easily, and to repair the filling layer with good appearance.

In order to solve such problems, an embodiment of the present invention provides a filling layer (3) between the roadbed concrete (1) and the track slab (5), and a rail (9) on the track slab. A repair formwork (30) for repairing a gap (S) formed to open laterally in the outer peripheral part of the filling layer of the slab type track to which the , a tape formwork (32 (32A to 32E)) having a sheet-like tape base material (34, 36) and an adhesive layer (38) provided on at least one surface of the tape base material; An injection mold (50, 70, 90) defining a communicating filler injection passage (62) is provided, and the tape mold closes the open side of the gap to form a filler loading space ( 21), it is pasted to span the upper surface (1A) of the roadbed concrete and the side surface (5A) of the track slab, forming an L-shape.

According to this configuration, the open side of the gap can be closed by attaching the tape form so as to span the upper surface of the roadbed concrete and the side surface of the track slab. Therefore, the work of installing the formwork can be done quickly and easily. Further, since the tape formwork can be removed by peeling it off, the work of removing the formwork can be done quickly and easily. Note that if the tape formwork is not removed, the filling layer will be easier to repair. In addition, since the tape formwork is attached to the top surface of the subgrade concrete and the side surface of the track slab so that it spans in an L-shape, there is no need for space for placing the formwork around the outer periphery of the gap. Can load the entire filler. Therefore, the filling layer can be repaired with good appearance. In addition, since tape formwork can be handled in roll form, storage and transportation of formwork material becomes easier.

In the repair formwork (30) for a slab type track having the above configuration, it is preferable that the tape formwork (32) is transparent or translucent.

According to this configuration, the loading state of the filler in the filler loading space can be visually confirmed. Therefore, the filler can be reliably loaded into the filler loading space. This eliminates the need for re-repair work in which filler is reinjected into voids found after demolding, which is required when conventional molds are used.

In the repair formwork (30) for a slab-type track having the above configuration, the tape base material (34, 36) preferably includes a nonwoven fabric (36) or a woven fabric.

According to this configuration, the shear strength of the tape formwork can be increased while suppressing the tape formwork from becoming thicker. Thereby, the filling layer can be repaired more quickly and easily. Specifically, the tape formwork is difficult to tear due to its high shear strength, making it easier to remove the formwork, and because it is not thick, the tape formwork is easily deformed, making it easier to install the formwork. become.

In the repair formwork (30) for a slab type track having the above configuration, the adhesive layer (38) is provided on one surface of the tape base material (34), and the tape formwork (32A) It may be bent to the outside of the track slab (5) and attached to the upper surface (1A) of the roadbed concrete (1).

According to this configuration, the tape formwork can be easily installed (attached) because it can be attached to the roadbed concrete outside the track slab.

In the above configuration, the tape formwork (32C) is a double-sided tape in which the adhesive layer (38) is provided on both sides of the tape base material (34, 36), and It is preferable that it is bent inward and attached to the upper surface of the roadbed concrete (1).

According to this configuration, a general-purpose double-sided tape can be used for the tape formwork, and the tape formwork swells outward due to the pressure of the filler loaded in the filler loading space (i.e., This prevents the tape formwork from loosening and expanding due to outward retreat of the adhesive surface of the tape formwork.

Alternatively, in the repair formwork (30) for a slab type track having the above configuration, the adhesive layer (38) is attached to one surface of the tape base material (34) at the top of the tape formwork (32D, 32E). The tape form is provided on the other side of the tape base material at the lower part of the tape form, and the tape form is bent inward of the track slab (5) to form the base concrete (1). It may be attached to the upper surface (1A).

According to this configuration, the tape formwork swells outward due to the pressure of the filler loaded in the filler loading space (in other words, the tape formwork bulges outward due to the outward retreat of the adhesive surface of the tape formwork to the roadbed concrete). This prevents the skin from loosening and swelling.

In the above configuration, a loading opening (40) for loading the filler is formed on the side surface of the track slab (5) in the filler loading space (21), and the injection mold (50, 70, 90) is disposed on the side of the track slab so as to surround the loading opening in plan view, and forms a filler injection port (60) at a position higher than the lower surface (5B) of the track slab. A formwork (50) may be included.

According to this configuration, the box-shaped formwork can be easily installed on the side of the track slab.

When a loading opening is formed, the loading opening (40) is preferably an opening formed in the tape mold (32A).

According to this configuration, after the tape formwork is installed over the entire length of the track slab, a loading opening consisting of an opening can be formed at a desired position.

Alternatively, when a loading opening is formed, the loading opening (40) may be formed by the two tape forms (32A) that are spaced apart from each other.

According to this configuration, the extension of the tape formwork can be shortened.

In the above configuration, the tape formwork (32B) is attached to span the side surfaces of the two track slabs (5) so as to close the sides of the gap between the two track slabs (5) adjacent to each other. , the filler injection channel (62) is arranged such that the injection mold (50, 70, 90) is disposed between the two track slabs without a gap and cooperates with the tape mold to open upward. ) and forming a filler inlet (60) at a position higher than the lower surface (5B) of the track slab.

According to this configuration, a filler injection passage can be easily formed between two adjacent track slabs using the tape formwork and the bag-like formwork.

Further, in the above configuration, the injection mold (50, 70, 90) includes an injection pipe (92) and an injection hose (94) that are integrally provided with the tape mold (32) so as to extend outward. It is preferable to include a tubular formwork (90) containing at least one of the above.

According to this configuration, the injection nozzle is connected to the injection pipe or the injection hose, and the filling material can be injected into the filling material loading space by pressure feeding. Therefore, the injection efficiency of the filler can be improved.

Moreover, in order to solve the above-mentioned problem, an embodiment of the present invention is a method for repairing a filling layer of a slab type track using a repair formwork (30) having the above-mentioned configuration, in which the filling layer (3) is removed. In order to define the filler loading space (21), the removal step removes the material between the roadbed concrete (1) and the track slab (5) in the horizontal direction from the surrounding area. a formwork installation step of installing a repair formwork (30) for the slab track so as to close the open side of the gap (S); 62) and loading the filling material into the filling material loading space.

According to this configuration, the repair formwork can be quickly and easily installed after the removal process. Therefore, the filler injection step can be performed early after the removal step. Alternatively, since a large amount of tape formwork can be brought to the site, after the removal process, repair formwork can be installed over a relatively long stretch, and the filler injection process can be carried out continuously over a relatively long stretch. .

In the filling layer repair method having the above configuration, an air vent hole drilling step of drilling an air vent hole (74) at a position corresponding to the upper part of the filler material loading space (21) in the tape formwork (32); an air vent hole closing step of affixing a tape (76) to the tape mold to close the air vent hole after air is released from the air vent hole by loading the filler material into the filler material loading space; It would be good to include more.

According to this configuration, the air vent hole can be easily formed at a desired position, and after the air vent hole is finished, the air vent hole can be easily closed by pasting the tape. Therefore, the filler can be reliably loaded into the filler loading space.

In the filling layer repair method having the above configuration, there is a step of removing the injection form (50, 70, 90) after the filling material has hardened, and a step of removing the injection form (50, 70, 90) after the filling material has hardened in the filling material injection path (62). It is preferable to further include an unnecessary filling material removal step of removing unnecessary filling material.

According to this configuration, the filling layer can be repaired with good appearance by removing unnecessary injection formwork and unnecessary filling material.

In the filling layer repair method having the above configuration, after the filling material is loaded into the filling material loading space (21), a weir plate (78 ) may further include a step of inserting a weir plate.

According to this configuration, the filler material that has accumulated and hardened in the filler injection channel can be easily removed without requiring cutting work.

Further, in order to solve the above problems, an embodiment of the present invention provides that the adhesive layer (38) is formed on one side of the tape base material (34) at the upper part of the tape formwork (32D, 32E). A filling layer repair method for a slab type track using a repair formwork (30) configured to be provided on the other side of the tape base material at the lower part of the tape formwork, the filling layer being (3) to a predetermined depth in the horizontal direction from the outer periphery, and the removal process removes the roadbed concrete (1) and the track slab (5) in order to define the filler loading space (21). a formwork installation step of installing the repair formwork (30) for the slab type track so as to close the open side of the gap (S) formed between the and a filler injection step of injecting the filler into the filler injection passage (62) and loading the filler into the filler loading space, and the tape formwork is configured to have one surface on the upper side of the tape base material in a pre-use state. an inner release paper (110) for the upper side that covers the adhesive layer provided on the tape substrate; and an outer release paper (110) for the lower side that covers the adhesive layer provided on the other surface of the lower side of the tape base material. (112), the outer release paper is provided with a plurality of score lines (114) extending along the longitudinal direction of the tape and spaced apart in the tape width direction, and the formwork installation step includes: A positioning step of marking (118) on the upper surface of the roadbed concrete directly below the side surface of the track slab, and a step of making a cut according to the height (H) from the upper surface of the roadbed concrete to the lower surface of the track slab. Remove the lower end of the outer release paper along the entry line, align the lower edge of the outer release paper with the mark with the lower part of the tape form facing inside the track slab, and place the tape form on the roadbed. A roadbed side attachment step in which the inner release paper is removed, the tape formwork is bent into an L-shape, and the upper part of the tape formwork is attached to the side surface of the track slab. process.

According to this configuration, the repair formwork can be quickly and easily installed after the removal process. Therefore, the filler injection step can be performed early after the removal step. In addition, by removing the lower end of the outer release paper at a position corresponding to the height from the top surface of the subgrade concrete to the lower surface of the track slab, and aligning the lower edge of the outer release paper with the mark, you can easily attach the tape formwork to the appropriate position. It can be installed in any position. That is, the tape formwork adhered to the upper surface of the roadbed concrete does not adhere to the roadbed concrete over an unnecessarily wide area, and the tape formwork can be easily bent into an L shape and attached to the side of the track slab. can. Further, it is possible to prevent the adhesive layer provided on the side surface side of the track slab in the upper part of the tape formwork from facing an unnecessarily large gap. Thereby, when the tape form is removed after the filler is injected and cured, it is possible to prevent the tape form from adhering to the filler and becoming difficult to remove.

As described above, according to the present invention, the filling layer can be repaired more quickly and easily, and the filling layer can be repaired with good appearance.

A perspective view showing an outline of a slab type track in which the repair formwork according to the present invention is used and the filling layer repair method according to the present invention is applied. A perspective view showing the installation state of the repair formwork according to the first embodiment A perspective view showing the assembled state of the repair formwork shown in Figure 2 IV-IV sectional view in Figure 2 V-V sectional view in Figure 2 An explanatory diagram of the assembly procedure of the repair formwork according to this embodiment An explanatory diagram of the assembly procedure of the repair formwork according to this embodiment An explanatory diagram of the assembly procedure of the repair formwork according to this embodiment A perspective view showing an assembled state of a repair formwork according to a modification of the present embodiment A perspective view showing the repair formwork according to the second embodiment A perspective view showing a repair formwork according to a third embodiment A sectional view corresponding to FIG. 4 showing the repair formwork according to the fourth embodiment Schematic sectional views showing three examples of detailed configurations of the tape formwork shown in FIG. 12 A sectional view showing the repair formwork according to the fifth embodiment A perspective view showing a state before use of the tape formwork according to the sixth embodiment An explanatory diagram of the assembly procedure of the tape formwork according to the sixth embodiment An explanatory diagram of the assembly procedure of the tape formwork according to the sixth embodiment

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

First, an outline of a slab type track using the repair formwork 30 according to the present invention and to which the filling layer repair method according to the present invention is applied will be explained with reference to FIG.

The slab type track has a filling layer 3 made of CA mortar (cement asphalt mortar) formed on a concrete road base 1, and a track slab 5 made of concrete installed on the filling layer 3. A rail 9 is fastened by a fastener 7. The track slab 5 is a precast product having a rectangular plate shape (rectangular parallelepiped shape). The thickness (height) of the filling layer 3 is approximately 50 mm (approximately 30 mm to 100 mm). In the slab type track, a plurality of track slabs 5 are arranged side by side in the rail installation direction.

Positioning recesses 11 are formed at both ends of the track slab 5 in the longitudinal direction. A cylindrical or semi-cylindrical positioning protrusion 13 that engages with the recess 11 is protrudingly formed on the roadbed concrete 1 .

The protrusion 13 has a cylindrical or semi-cylindrical shape. The recess 11 is approximately semicircular in plan view and has an inner diameter that is approximately 50 mm larger than the outer diameter of the protrusion 13 . The recess 11 and the protrusion 13 engage concentrically with a gap therebetween. This gap is a space formed between the inner circumferential surface of the recess 11 and the outer circumferential surface of the protrusion 13 due to the difference between the inner diameter and the outer diameter, and is an annular or approximately semicircular space in a plan view. It is filled with an arc-shaped filling layer 19, leaving a drainage passage section 17 at the bottom (bottom). Thereby, the recess 11 and the protrusion 13 work together with the arcuate filling layer 19 to act as a positioning part that restrains (regulates) the lateral movement of the track slab 5 on the roadbed concrete 1.

Next, the configuration of a first embodiment of the repair formwork 30 according to the present invention will be described with reference to FIGS. 2 to 5.

As shown in FIG. 2, when the repair formwork 30 repairs the outer periphery of the filling layer 3, a gap S (see FIG. 4) is formed in the outer periphery of the filling layer 3 so as to open laterally. It is used to inject liquid filler into. The repair formwork 30 includes a tape formwork 32 (32A, 32B), a box-like formwork 50 for injecting a filler, and a bag-like formwork 70 for injecting a filler. The tape formwork 32 is installed as a lower tape formwork 32A arranged at the height of the filling layer 3 and an upper tape formwork 32B arranged at a higher position.

The filler used is a two-component synthetic resin mixed with aggregate and a hardening agent. The synthetic resin may be vinyl ester resin, urethane resin, epoxy resin, or the like. The filler is supplied by a dedicated filler supply device mounted on a cart movably provided on the rails 9. Specifically, the filler supply device mixes the first liquid and the second liquid separately with aggregate and hardening agent, pumps them by separate pumps, and then mixes them by a mixer installed in front of the injection nozzle. Then, supply it from the injection nozzle. In other embodiments, the filler may be CA mortar or other materials.

As shown in FIG. 4, the tape formwork 32 includes a sheet-shaped resin film 34, a sheet-shaped nonwoven fabric 36 (nonwoven fabric layer), and an adhesive such as an acrylic adhesive coated on the surface of the resin film 34 on the nonwoven fabric 36 side. It has a three-layer structure including an adhesive layer 38 formed by an adhesive. The resin film 34 and the nonwoven fabric 36 form a tape base material for applying the adhesive in the tape form 32. The tape formwork 32 has a width (approximately 100 mm to 150 mm) larger than the thickness of the filling layer 3 (approximately 40 mm to 80 mm) and an appropriate thickness (approximately 0.1 mm to 1 mm), and is in a state before use. It is said to be in the form of a roll wrapped around a core material.

The resin film 34 is made of a polyester resin (polyester film). The resin film 34 has flexibility, which gives the tape formwork 32 excellent shape followability, and has a high elastic modulus, which gives the tape the characteristics of being hard to stretch and hard to loosen. It is applied to the formwork 32.

The nonwoven fabric 36 is formed by compressing fibers with high shear strength into a thin sheet shape, and is integrally bonded to the resin film 34 with an adhesive to impart high shear strength to the tape formwork 32. There is. Furthermore, the nonwoven fabric 36 has higher heat resistance than the resin film 34, and suppresses elongation of the tape form 32 even if the filler generates heat during curing and reaches a high temperature.

The adhesive layer 38 is formed of an acrylic adhesive or the like, and has a predetermined 180 degree peeling adhesive strength to the concrete surface. Specifically, the adhesive layer 38 provides the tape formwork 32 with such adhesive strength that it does not peel off when the loading pressure (lateral pressure) of the filler is applied, but can be peeled off by human force. The adhesive layer 38 is applied in the form of a sheet over the entire surface of the tape base material (34, 36), and has the function of preventing the filler from permeating by itself.

The tape formwork 32 is transparent or semitransparent with a colorless or pale white color, and the back side of the tape formwork 32 is visible from the outside when the tape formwork 32 is installed at a predetermined position. Here, being able to see the back side does not mean that a part remote from the back side can be seen, but it means that the liquid level of the filler material loaded on the back side of the tape form 32 can be seen.

As such a tape formwork 32, for example, an adhesive tape manufactured by Nitto Denko Corporation (product name: HF-105P) can be used.

The tape formwork 32A is attached so as to span the upper surface 1A of the roadbed concrete 1 and the side surface 5A of the track slab 5, forming an L-shape, and closes the open side of the gap S, thereby forming a filling layer. A filler loading space 21 is defined on the outer periphery of 3. Since the adhesive layer 38 is provided on one side of the resin film 34 and the nonwoven fabric 36 that are tape base materials, the tape formwork 32 has a lower end that is not in a track with respect to the part that defines the filler loading space 21. It is bent to the outside of the slab 5 and attached to the upper surface 1A of the roadbed concrete 1. The tape formwork 32 has upper and lower parts so that the part defining the filler loading space 21 hangs vertically without slack from the upper part attached to the side surface 5A of the track slab 5, and is bent with the smallest possible radius of curvature. The position has been adjusted and pasted.

As shown in FIG. 2, the tape formwork 32A straddles the two track slabs 5 adjacent to each other in the front-rear direction so as to collectively close the open side of the gap S between the two track slabs 5. installed continuously. In other words, the tape formwork 32A is attached so as to span the side surfaces 5A of the two track slabs 5 adjacent to each other.

The upper tape formwork 32B is shorter than the lower tape formwork 32A, and is provided so as to span the side surfaces 5A of the two track slabs 5 along the side surface 5A of the track slab 5, so that these track slabs 5. Close the sides of the gap.

As shown in FIG. 3, the lower tape formwork 32A has an opening that serves as a loading opening 40 for loading filler material at an appropriate position corresponding to the track slab 5 in the front-rear direction. . In the illustrated example, three loading openings 40 are formed for one track slab 5. The loading opening 40 is formed at a position corresponding to the height of the filling layer 3, that is, on the side surface 5A side of the track slab 5 in the filling material loading space 21.

As shown in FIGS. 2, 3, and 5, the box-shaped formwork 50 is made of foamed resin such as styrofoam or urethane foam, and rises from three sides of the bottom wall 52 and the bottom wall 52, which are rectangular in plan view. It has a side wall 54. The box-shaped formwork 50 is arranged on the side of the track slab 5 so as to surround the loading opening 40 in a plan view. An elastic sealing member 56 is provided on the surface of the box-shaped formwork 50 on the track slab 5 side.

The box-shaped formwork 50 is fixed in pressure contact with the track slab 5 by a stopper 58 that is engaged with the rail 9 (not shown in FIGS. 2, 3, etc.). In the installed state in which the box-shaped formwork 50 is fixed by the fasteners 58, the sealing member 56 deforms to follow the shapes of the track slab 5 and tape formwork 32A, thereby coming into close contact with them.

The box-shaped formwork 50 in the installed state forms an upward filler injection port 60 at a position higher than the lower surface 5B of the track slab 5, and a first filler material is formed between the filler injection port 60 and the loading opening 40. An injection passage 62A is defined. That is, the box-shaped formwork 50 is an injection formwork that forms a filler injection passage 62. The first filler injection passage 62A communicates with the filler loading space 21 through the loading opening 40 and opens upwardly through the filler injection port 60.

As shown in FIG. 2, the bag-like formwork 70 is a flexible and elastic airtight bag made of a resin sheet made of a flexible material such as a polyurethane film. The bag-shaped formwork 70 has a circular cross-sectional shape with a diameter of about 50 mm and defines an airtight chamber inside, and is a linear formwork with a balloon structure that is inflated by gas such as air injected into the airtight chamber. be.

The bag-like formwork 70 is inserted between two track slabs 5 adjacent to each other, and is arranged between these track slabs 5 without any gaps. The bag-like formwork 70 is fixed by friction by coming into elastic contact with the front and rear track slabs 5 by air pressure. Alternatively, a support member may be provided between the bag-like formwork 70 and the projection 13 to fix the bag-like formwork 70. The bag-like formwork 70 is disposed at a position apart from the tape formwork 32, thereby cooperating with the tape formwork 32 to define a second filler injection passage 62B between the bag-like formwork 70 and the tape formwork 32. That is, the bag-like formwork 70 is an injection formwork that cooperates with the tape formwork 32 to form the filler injection passage 62.

The second filler injection passage 62B has a filler inlet 60 formed at its upper end at a position higher than the lower surface 5B of the track slab 5, and a loading opening 40 formed at its lower end in the filler loading space 21 of the track slab 5. Formed on the front or rear side.

Next, the procedure of the filling layer repair method using the repair formwork 30 according to the first embodiment will be explained mainly with reference to FIGS. 6 to 8. In the filling layer repair method, the work steps described below are executed in this order.

In the filling layer repair method, first, a removal step is performed in which the filling layer 3 is removed horizontally from the outer periphery to a predetermined depth. The removal process is carried out along the entire length of the filling layer 3 along the side edges, and this removal process creates a gap S (see Fig. 4 and FIG. 5) are formed.

Next, as shown in FIG. 6(A), a primer application step is performed in which a primer 72 is applied to an area of the upper surface 1A of the concrete road base 1 and the side surface 5A of the track slab 5 where the tape formwork 32 is to be pasted. conduct. The primer application step is optional and may not be performed. The primer 72 may be made of a material suitable for the adhesive of the tape formwork 32. As the primer 72, for example, Bond G7700N (trade name) or Bond G17 spray (trade name) manufactured by Konishi Co., Ltd. can be used.

As shown in FIG. 6(B), a first tape formwork is attached to form an L-shape and span the lower tape formwork 32A over the upper surface 1A of the roadbed concrete 1 and the side surface 5A of the track slab 5. Perform the installation process. By the first tape form installation step, the open side of the gap S is closed, and a filler loading space 21 is defined at the outer periphery of the filler layer 3. Further, in parallel with this, a second tape form installation step is performed in which the upper tape form 32B is pasted so as to span the side surfaces 5A of two mutually adjacent track slabs 5. By the second tape form installation step, the sides of the gap between the two track slabs 5 are closed.

As shown in FIGS. 6(C) and 3, a first tape form cutting step is performed in which the lower tape form 32A is cut with a cutter or the like to form an opening. By the tape form cutting process, a loading opening 40 for loading a filler material is formed on the side surface 5A side of the track slab 5 in the filler loading space 21. Since the loading opening 40 is an opening formed in the tape formwork 32A, it is possible to form the loading opening 40 by creating an opening at a desired position after installing the tape formwork 32A over the entire length of the track slab 5. can.

As shown in FIG. 2, the box-like formwork 50 is arranged on the side of the track slab 5 so as to surround the loading opening 40 in plan view, and the bag-like formwork 70 is placed on the side of the track slab 5. Carry out the process of installing molds for injection, placing them without any gaps between them. As shown in FIGS. 2 and 5, the filling material injection port 60 that opens upward at a position higher than the lower surface 5B of the track slab 5 is formed by the injection form installation process, and the filling material loading space 21 is A communicating filler injection passage 62 is defined.

The box-shaped formwork 50 can be easily installed by arranging it on the side of the track slab 5 so as to surround the loading opening 40 in a plan view. The bag-like formwork 70 cooperates with the tape formwork 32 by being arranged without any gap between the track slabs 5 to define the second filler injection passage 62B. Therefore, the second filler injection passage 62B can be easily formed.

As shown in FIGS. 5 and 7 ((D) to (F)), the filler supplied by the filler supply device is injected into the filler injection passage 62 from the filler injection port 60, and the filler is filled. A filling material loading step is performed to load the material into the material loading space 21. Injection of the filler material is performed by gravity, and is performed sequentially from one side to the other in the front-back direction. When the filler loading space 21 is formed on both the left and right outer peripheral portions of the filler layer 3, the filler is preferably injected into the left and right filler injection ports 60 at the same time. Since the tape formwork 32 is transparent or translucent, the loading state of the filler in the filler loading space 21 can be visually confirmed, and the filler is injected while checking the loading condition. 60 moves can be made. Therefore, the filler can be reliably loaded into the filler loading space 21. This eliminates the need for re-repair work in which filler is reinjected into voids found after demolding, which is required when conventional molds are used.

In the filler loading step, as shown in FIG. 7(D), air may accumulate in the upper part of the filler loading space 21. In this case, as shown in FIG. 7(E), an air bleed hole forming process is performed in which an air bleed hole 74 is formed at a position corresponding to the upper part of the filler loading space 21 in the tape formwork 32A. Through the air vent hole drilling step, the air accumulated on the back side of the tape formwork 32A is discharged to the outside from the air vent hole 74, and the filler material is also loaded into the upper part of the filler material loading space 21. The air vent hole 74 is preferably made as small as possible within a size range that allows air to escape at a desired speed. When the filler is loaded into the upper part of the filler loading space 21, the filler leaks to the outside from the air vent hole 74.

Therefore, after the air bleed is completed, as shown in FIG. 7(F), an air bleed hole closing step is performed in which the tape 76 is attached to the tape mold 32A to close the air bleed hole 74. The tape 76 can be made by cutting the tape formwork 32 into small pieces. Before applying the tape 76, it is preferable to wipe off the filler material leaking from the air vent hole 74. The air bleed hole closing process stops the leakage of the filling material. Note that the step of closing the air vent hole is optional. That is, the filler is mixed with aggregate as described above, and the tape formwork 32A has the nonwoven fabric 36. Therefore, if the filler continues to leak for a while, the aggregate will become entangled with the nonwoven fabric 36 and the air vent hole 74 will become clogged. This will eventually stop the filler from leaking.

As described above, by performing the air vent hole drilling process and the air vent hole closing process, the air vent hole 74 can be easily bored at a desired position, and after the air vent hole is finished, it can be easily made by pasting the tape 76. The air vent hole 74 can be closed. Therefore, the filler can be reliably loaded into the filler loading space 21.

After the injection of the filler from one filler injection port 60 into the filler loading space 21 is completed, as shown in FIG. A weir plate insertion step of inserting the plate 78 is performed. By the weir plate insertion step, when removing the box-like formwork 50 after the filler has hardened, it is possible to easily remove the filler that has hardened and accumulated in the filler injection passage 62 in the box-like formwork 50. can. Although the box-shaped formwork 50 and the first filler injection passage 62A are shown in FIG. 8, the second filler injection passage 62B and the filler injection passage formed between the bag-like formwork 70 and the tape formwork 32 are A dam plate 78 is similarly inserted into the communication portion with the loading space 21.

After the filling material hardens, an injection mold removal process is performed in which the box-shaped mold 50 and the bag-shaped mold 70 are removed. Simultaneously with this, or after the injection mold removal process, an unnecessary filler removal process is performed to remove the unnecessary filler that has hardened in the filler injection passage 62. By removing the unnecessary bag-like formwork 70 for injection and the unnecessary filling material in the injection mold removal process and the unnecessary filling material removal process, the filling layer 3 can be repaired with a good appearance.

Thereafter, a tape formwork removal process is performed in which the tape formwork 32 is removed. Note that the tape formwork removal process is optional. That is, since the tape formwork 32 does not protrude from the upper surface 1A of the roadbed concrete 1, the side surface 5A of the track slab 5, or the side edge of the filling layer 3 repaired by hardening of the filling material, it is left as is without being removed. Good too. Through the above steps, the filling layer repair method is completed.

As described above, the filling layer repair method for slab type track includes a removal step of removing the filling layer 3 from the outer periphery, a formwork installation step of installing the repair formwork 30 (FIGS. 6, 3, and 2), and A filler injection step (FIG. 7) is performed in which the filler is loaded into the filler loading space 21. These steps allow the repair formwork 30 to be installed quickly and easily after the removal step. Therefore, the filler injection step can be performed early after the removal step. Alternatively, since a large amount of tape formwork 32 can be brought to the site, after the removal process, repair formwork 30 can be installed over a relatively long length, and the filler injection process can be performed continuously over a relatively long length. I can do it.

In the repair formwork 30 for slab-type track according to the present embodiment, as shown in FIG. By this, the open side of the gap S can be closed. Therefore, the work of installing the formwork can be done quickly and easily. Furthermore, since the tape formwork 32 can be removed by peeling it off, the work of removing the formwork can be done quickly and easily. Note that if the tape formwork 32 is not removed, the filling layer 3 can be repaired even more easily. In addition, since the tape formwork 32 is attached to the top surface 1A of the concrete road base 1 and the side surface 5A of the track slab 5 so as to form an L-shape and span the bridge, no space for formwork placement is required on the outer periphery of the gap S. , the entire gap S can be filled with the filler material. Therefore, the filling layer 3 can be repaired with good appearance. Furthermore, since the tape formwork 32 can be handled in the form of a roll, the formwork material can be easily stored and transported.

In addition, since the tape base material of the tape formwork 32 has the nonwoven fabric 36 on the side of the resin film 34 on which the adhesive layer 38 is provided, the tape formwork 32 can be formed into a tape form while suppressing the tape formwork 32 from becoming thick. The shear strength of the frame 32 can be increased. As a result, the tape formwork 32 is difficult to tear due to its high shear strength, making it easier to remove the formwork, and because it is not thick, the tape formwork 32 is easily deformed, making it easier to install the formwork. become. Furthermore, since the nonwoven fabric 36 suppresses the elongation of the tape formwork 32 due to the heat of curing of the filler material, the tape formwork 32 will bulge outward after the filler is loaded, and a space will be created in the filler loading space 21. is suppressed.

An adhesive layer 38 is provided on one surface of a tape base material made of a resin film 34 and a nonwoven fabric 36. Since the tape formwork 32 is bent to the outside of the track slab 5 and attached to the upper surface 1A of the roadbed concrete 1, it can be attached to the roadbed concrete 1 outside the track slab 5. Therefore, the installation work (pasting work) of the tape formwork 32 is easy.

Next, a modification of the first embodiment will be described with reference to FIG. 9. Note that the same members and parts as in the first embodiment are denoted by the same reference numerals, and overlapping explanations will be omitted. In this modification, as illustrated, the loading opening 40 is formed by two tape forms 32A spaced apart from each other. In this configuration, although the tape formwork 32A cannot be continuously installed over the entire length of the track slab 5 as in the first tape formwork installation step (FIG. 6(B)) of the first embodiment, the tape formwork 32A extension can be shortened.

FIG. 10 is a perspective view showing a repair formwork 30 according to the second embodiment. Here, the same members and parts as in the first embodiment are denoted by the same reference numerals, and redundant explanations will be omitted. The same applies to other embodiments described below. As shown in the figure, in this embodiment, the second filler injection passage 62B is not formed between the track slabs 5 adjacent to each other, and the second filler injection passage 62B is not formed between the track slabs 5 adjacent to each other. The open front and rear parts are closed by a bag body 80. The tape formwork 32 is provided only in the lower tape formwork 32A, and is not provided in the upper case.

Like the bag-like formwork 70, the bag body 80 is made of a flexible and elastic resin sheet, and is airtight and has flexibility and elasticity. This is a formwork with an inflatable balloon structure. The bag body 80 is inserted between the two track slabs 5 in a sideways state, and is inflated by the injected gas and tightly contacts the front and rear parts of the gap S. The bag body 80 is fixed to the roadbed concrete 1 and the track slab 5 by friction, and defines a filler loading space 21 at the outer periphery of the filler layer 3 .

With such a configuration as well, the same effects as in the first embodiment can be obtained.

FIG. 11 is a perspective view showing a repair formwork 30 according to the third embodiment. As illustrated, in this embodiment as well, the second filler injection passage 62B is not formed between the track slabs 5 adjacent to each other. The front and rear parts of the gap S, which is open in the front-rear direction, are closed by the tape formwork 32A. The tape formwork 32A is attached so as to span the front or rear surface of the track slab 5 and the upper surface 1A of the roadbed concrete 1, forming an L-shape, and closing the front or rear part of the gap S.

With such a configuration, the filler loading space 21 can also be defined, and the same effects as in the embodiment described above can be obtained.

FIG. 12 is a sectional view corresponding to FIG. 4 showing a repair formwork 30 according to a fourth embodiment. As shown in the figure, in this embodiment, the lower tape formwork 32 (32C or 32D) placed at the height of the filling layer 3 is bent inside the track slab 5 and attached to the upper surface 1A of the subgrade concrete 1. has been done.

FIG. 13 is a schematic sectional view showing three examples of detailed configurations of the tape formwork 32 shown in FIG. 12. As shown in FIG. 13(A), in this tape formwork 32C, the adhesive layer 38 is applied to the entire surface of both surfaces of the tape base material. The tape base material of the tape formwork 32C does not include the resin film 34 (FIG. 4), but only includes the nonwoven fabric 36. In another form, the tape base material of the tape formwork 32C may be provided with the resin film 34 (FIG. 4). In this case, the nonwoven fabric 36 may be provided on both sides of the resin film 34, or may be provided on both sides. Alternatively, the nonwoven fabric 36 may not be provided.

In this way, the tape formwork 32C is a double-sided tape in which the adhesive layer 38 is provided on both sides of the tape base material. Thereby, as shown in FIG. 12, the tape formwork 32C can be bent inside the track slab 5 and attached to the upper surface 1A of the roadbed concrete 1.

As shown in FIG. 13(B), in this tape formwork 32D, the adhesive layer 38 is provided on one surface in the upper part of the tape base material, and provided in the other surface in the lower part. The tape base material is composed of a resin film 34 provided over the entire width of the tape formwork 32D, and a nonwoven fabric 36 provided on one surface at the top of the resin film 34 and the other surface at the bottom. . The nonwoven fabric 36 and adhesive layer 38 provided on the upper part and the nonwoven fabric 36 and adhesive layer 38 provided on the lower part are spaced apart in the vertical direction so that they do not adhere to each other when in a rolled state before use. There is.

As shown in FIG. 13(C), in this tape formwork 32E, two tape formwork materials narrower in width than those in the above embodiment are made so that their adhesive layers 38 face each other and overlap in the vertical direction. By bringing them into contact with each other in this state, they are bonded to each other by the adhesive layer 38.

In this way, the adhesive layer 38 is provided on one surface of the tape base material at the top of the tape forms 32D, 32E, and is provided on the other surface of the tape base material at the bottom of the tape forms 32D, 32E. It will be done. Thereby, as shown in FIG. 12, the tape forms 32D and 32E can be bent inside the track slab 5 and attached to the upper surface 1A of the roadbed concrete 1.

Then, the tape formworks 32C, 32D, and 32E are bent inside the track slab 5 and attached to the upper surface 1A of the roadbed concrete 1, so that the pressure of the filler loaded in the filler loading space 21 is applied to the tape formwork 32C. , 32D, and 32E can be prevented from expanding outward. That is, it is possible to prevent the tape form 32 from loosening and expanding due to the outward retreat of the adhesive surface of the tape form 32A to the roadbed concrete 1 as shown in FIG.

FIG. 14 is a sectional view showing a repair formwork 30 according to the fifth embodiment. As shown in FIG. 14, the repair formwork 30 includes a tape formwork 32 and a tubular formwork 90 for injecting filler, which is integrally provided with the tape formwork 32 and extends outward. . The tape formwork 32 is a double-sided tape in which an adhesive layer 38 is applied to the entire surface of both surfaces of the tape base material, as shown in FIG. 13(A). In another embodiment, the tape formwork 32 may be a partially double-sided tape in which the adhesive layer 38 is applied to each part of both sides as shown in FIGS. 13(B) and 13(C). It may also be a single-sided tape as shown in 4.

The tubular formwork 90 has an injection pipe 92 and an injection hose 94. The injection pipe 92 has a joint pipe 96 and a flange 98 integrally provided at one end of the joint pipe 96. The injection tube 92 may be made of resin, metal, or other materials. A circular opening 100 is formed in the tape formwork 32 and is large enough to allow the joint pipe 96 to be inserted therethrough. This circular opening 100 is formed at an appropriate position when the tape formwork 32 is assembled. The injection pipe 92 is integrally attached to the tape formwork 32 by inserting the joint pipe 96 into the circular opening 100 from inside the tape formwork 32 and joining the flange 98 to the inner surface of the tape formwork 32.

The flange 98 of the injection tube 92 is adhered to the tape form 32 by an adhesive layer 38 provided on the inner surface of the tape form 32. Further, in this embodiment, in order to more firmly adhere the flange 98 to the tape formwork 32, an annular attachment having an outer diameter larger than the outer diameter of the flange 98 and an inner diameter smaller than the outer diameter of the flange 98 is used. A tape 102 is provided. The mounting tape 102 is adhered to the inner surface of the tape formwork 32 so as to sandwich the flange 98 therebetween. The injection tube 92 is attached to the tape formwork 32 during assembly of the tape formwork 32.

The injection hose 94 is made of a resin sheet made of a flexible material such as polyvinyl chloride or polyolefin, and is flexible but not stretchable. A thread made of polyester or the like may be contained inside the resin material of the injection hose 94. The injection hose 94 has one end attached to the joint pipe 96 of the injection tube 92 by a band 104. The other end of the injection hose 94 is open.

Since the repair formwork 30 is configured in this way, by inserting and connecting the injection nozzle 106 to the injection hose 94, as shown by the imaginary line in FIG. The filler material can be injected into the filler material loading space 21 . Therefore, the injection efficiency of the filler can be improved. Furthermore, a tubular formwork 90 for injecting filler material can be provided at any position during formwork assembly. Note that the tubular formwork 90 only needs to include at least one of an injection pipe 92 and an injection hose 94.

Note that after the filler is injected from the tubular form 90, the injection hose 94 may be tied with a string, rope, etc. to prevent the filler from leaking from the filler injection passage 62 in the tubular form 90. . After the filling material hardens, the tubular formwork 90 is removed together with the tape formwork 32. The filler that has accumulated and solidified in the filler injection passage 62 in the tubular form 90 is cut and removed after the tubular form 90 is removed. Thereby, the filling layer 3 can be repaired with good appearance.

FIG. 15 is a perspective view showing a state before use of the tape formwork 32F according to the sixth embodiment. As shown in FIG. 14, the tape formwork 32F of this embodiment has a tape base material (34, 36) inner release paper 110 for the upper side that covers the adhesive layer 38 provided on one surface of the upper side of the tape base material, and a lower side that covers the adhesive layer 38 provided on the other surface of the lower side of the tape base material. The difference is that it includes an outer release paper 112 for use. In the illustrated example, the inner release paper 110 and the outer release paper 112 are provided only in the portion where the adhesive layer 38 is exposed (the portion where the upper and lower tape form materials do not overlap). In other examples, the inner release paper 110 and the outer release paper 112 may have the same width as the corresponding tape form blanks.

The outer release paper 112 is provided with a plurality of score lines 114 extending along the tape longitudinal direction and spaced apart from each other in the tape width direction. Each cut line 114 may be provided in a form that divides the outer release paper 112 into upper and lower parts, or may be provided in the form of a perforation. Alternatively, each cut line 114 may be provided on one surface of the outer release paper 112 only partially in the thickness direction (with a depth smaller than the thickness of the outer release paper 112). The plurality of score lines 114 may be provided, for example, at 1 cm intervals, 5 mm intervals, or the like. The cut line 114 provided at the lowest end of the outer release paper 112 is provided at a position 3 cm or more away from the lower edge of the outer release paper 112 (W1>3 cm). Further, it is preferable that the dimension of the height H, which will be described later, corresponding to the cut line 114 is printed on the outer release paper 112 at appropriate intervals in the longitudinal direction of the tape. In FIG. 15, the tape form 32F is shown in a linear shape, but before use, the tape form 32F is in the form of a roll wound around a core material.

16 and 17 are explanatory diagrams of the assembly procedure of the tape formwork 32F according to the sixth embodiment. In this embodiment, the tape formwork installation process is different from the above embodiment, and the other steps are the same as in the above embodiment. The tape formwork installation process will be explained below.

As shown in FIG. 16(A), first, a measurement process is performed in which the height H from the upper surface 1A of the concrete road base 1 to the lower surface 5B of the track slab 5 is measured. Next, a positioning step is performed in which a mark 118 is placed directly below the side surface 5A of the track slab 5 on the upper surface 1A of the concrete road base 1 using an appropriate tool 116 such as a finger square (L-shaped ruler), a level, or a plumb bob. conduct. Either of the measurement process and the positioning process may be performed first.

Next, as shown in FIG. 16(C), the lower end of the outer release paper 112 is cut along the cut line 114 corresponding to the height H from the upper surface 1A of the concrete road base 1 to the lower surface 5B of the track slab 5. remove. Subsequently, as shown in FIG. 17(D), the lower part of the tape form 32F is directed inside the track slab 5, the lower edge of the outer release paper 112 is aligned with the mark 118, and the tape form 32F is placed on the roadbed concrete 1. The roadbed side pasting process is carried out to paste on the upper surface 1A of the roadbed. Since the upper part of the outer release paper 112 is not removed, the tape formwork 32F is bonded to the upper surface 1A of the roadbed concrete 1 only on the inner side of the track slab 5 than the mark 118.

Next, as shown in FIG. 17(E), the inner release paper 110 is removed, and as shown in FIG. 17(F), the tape form 32F is bent into an L shape and the upper part of the tape form 32F is raised. A slab side pasting step is performed to pasted the side surface 5A of the track slab 5. As a result, the open side of the gap S is closed, and a filler loading space 21 is defined at the outer periphery of the filler layer 3. In FIG. 16(C), the cut line 114 for removing the lower end of the outer release paper 112 indicates that when the tape formwork 32F is bent and raised, the upper edge of the lower tape formwork material is on the lower surface 5B of the track slab 5. It is provided at a matching position (corresponding to the height H). Therefore, the adhesive layer 38 of the upper tape formwork material adheres to the side surface 4A of the track slab 5 over its entire surface and is not exposed to the filler loading space 21. That is, only the resin film 34 of the lower tape formwork material is exposed to the filler loading space 21.

In this way, in the step shown in FIG. 16(C), the lower end of the outer release paper 112 is removed at a position corresponding to the height H from the upper surface 1A of the roadbed concrete 1 to the lower surface 5B of the track slab 5, and the lower end of the outer release paper 112 is removed as shown in FIG. By aligning the lower edge of the outer release paper 112 with the mark 118 in the roadbed side attachment process of D), the tape formwork 32F can be easily installed at an appropriate position. In other words, the tape formwork 32F adhered to the upper surface 1A of the roadbed concrete 1 does not adhere to the roadbed concrete 1 over an unnecessarily wide area, and the tape formwork 32F is easily attached to the roadbed concrete 1 in the slab-side pasting process shown in FIG. 17(F). The frame 32F can be bent into an L shape and attached to the side surface 5A of the track slab 5.

Moreover, the adhesive layer 38 provided on the side surface 5A side of the track slab 5 at the upper part of the tape formwork 32F is suppressed from facing the gap S unnecessarily large. This prevents the tape form 32F from adhering to the filler and making it difficult to remove when the tape form 32F is removed after the filler is injected and cured.

Although the present invention has been described above with reference to its preferred embodiments, as will be easily understood by those skilled in the art, the present invention is not limited to such embodiments, and there may be no deviation from the spirit of the present invention. It can be changed as appropriate to the extent that it does not.

For example, although the tape formwork 32 described above has a nonwoven fabric 36 as a tape base material, it may have a woven fabric instead of the nonwoven fabric 36, or it may not have a nonwoven fabric 36 or a woven fabric. good. Moreover, the repair formwork 30 may not include the box-like formwork 50 that defines the first filler injection passage 62A, but only the bag-like formwork 70 that defines the second filler injection passage 62B. . Furthermore, a weir plate-like formwork may be used instead of the bag-like formwork 70 as the injection formwork that defines the second filler injection passage 62B.

Further, all of the constituent elements shown in the above embodiments are not necessarily essential, and can be selected as appropriate without departing from the spirit of the present invention.

1 Roadbed concrete 1A Top surface 3 Filling layer 5 Track slab 5A Side surface 5B Bottom surface 21 Filler loading space 30 Repair formwork 32 Tape formwork 32A, 32C, 32D, 32E, 32F Lower tape formwork 32B Upper tape formwork 34 Resin Film (tape base material)
36 Nonwoven fabric (tape base material)
38 Adhesive layer 40 Loading opening 50 Box-shaped formwork (injection formwork)
60 Filler injection port 62 Filler injection passage 62A First filler injection passage 62B Second filler injection passage 70 Bag-shaped formwork (injection formwork)
74 Air vent hole 76 Tape 78 Weir plate 90 Tubular formwork (injection formwork)
92 Injection pipe 94 Injection hose 110 Inner release paper 112 Outer release paper 114 Cut line 118 Mark H Height from upper surface 1A of roadbed concrete 1 to lower surface 5B of track slab 5 S Gap

Claims (14)

A filling layer is provided between the roadbed concrete and the track slab, and a gap formed to open laterally at the outer periphery of the filling layer of a slab type track where a rail is fastened to the track slab is filled with liquid. A repair formwork for repairing by pouring material,
a tape formwork having a sheet-like tape base material and an adhesive layer provided on at least one surface of the tape base material;
and an injection mold defining a filler injection passage communicating with the void,
The tape formwork spans the upper surface of the roadbed concrete and the side surface of the track slab in order to close the open side of the gap and define a filler loading space at the outer periphery of the filler layer. It is pasted like this to form an L shape,
The tape formwork is a double-sided tape in which the adhesive layer is provided on both sides of the tape base material, and is bent inside the track slab and attached to the upper surface of the roadbed concrete. Features: Repair formwork for slab type track. A filling layer is provided between the roadbed concrete and the track slab, and a gap formed to open laterally at the outer periphery of the filling layer of a slab type track where a rail is fastened to the track slab is filled with liquid. A repair formwork for repairing by pouring material,
a tape formwork having a sheet-like tape base material and an adhesive layer provided on at least one surface of the tape base material;
and an injection mold defining a filler injection passage communicating with the void,
The tape formwork spans the upper surface of the roadbed concrete and the side surface of the track slab in order to close the open side of the gap and define a filler loading space at the outer periphery of the filler layer. It is pasted like this to form an L shape,
The adhesive layer is provided on the one surface of the tape base material at the top of the tape form, and is provided on the other surface of the tape base material at the bottom of the tape form, and the adhesive layer is provided on the other surface of the tape base material at the bottom of the tape form. A repair formwork for a slab type track, characterized in that the formwork is bent inside the track slab and attached to the upper surface of the roadbed concrete. The repair formwork for a slab type track according to claim 1 or 2, wherein the tape formwork is transparent or translucent. The repair formwork for a slab type track according to any one of claims 1 to 3, wherein the tape base material includes a nonwoven fabric or a woven fabric. A loading opening for loading the filler material is formed on the side surface side of the track slab in the filler material loading space,
The injection mold is arranged on a side of the track slab so as to surround the loading opening in a plan view, and includes a box-shaped mold forming a filler injection port at a position higher than the lower surface of the track slab. A repair formwork for a slab type track according to any one of claims 1 to 4 , characterized in that it comprises: 6. The repair formwork for a slab type track according to claim 5 , wherein the loading opening is an opening formed in the tape formwork. 6. The repair formwork for a slab track according to claim 5 , wherein the loading opening is formed by two of the tape formworks spaced apart from each other. The tape formwork is attached so as to span the side surfaces of the two track slabs so as to close the sides of the gap between the two track slabs that are adjacent to each other,
The injection formwork is disposed between the two track slabs without any gaps and cooperates with the tape formwork to define the filler injection passage so as to open upwardly, and from the lower surface of the track slab. The repair formwork for a slab type track according to any one of claims 1 to 6 , further comprising a bag-like formwork made of a flexible material and forming a filler injection port at a high position. According to any one of claims 1 to 6 , the injection mold includes at least one of an injection pipe and an injection hose that are integrally provided with the tape mold so as to extend outward. Repair formwork for slab track. A filling layer repair method for a slab type track using the repair formwork according to any one of claims 1 to 9 ,
a removal step of removing the filling layer horizontally from the outer periphery to a predetermined depth;
Formwork installation in which the repair formwork is installed so as to close the open side of the gap created between the roadbed concrete and the track slab by the removal process in order to define the filler loading space. process and
A method for repairing a filling layer of a slab type track, comprising a filling material injection step of injecting the liquid filling material into the filling material injection passage and loading the filling material into the filling material loading space. an air vent hole drilling step of drilling an air vent hole at a position corresponding to the upper part of the filler loading space in the tape form;
The method further includes an air bleed hole closing step of affixing a tape to the tape mold to close the air bleed hole after air is released from the air bleed hole by loading the filler into the filler loading space. The filling layer repair method for a slab type track according to claim 10 . an injection form removal step of removing the injection form after the filling material has hardened;
The filling layer repair method for a slab type track according to claim 10 or 11 , further comprising the step of removing unnecessary filling material that has hardened in the filling material injection passage. A claim further comprising a weir plate insertion step of inserting a weir plate into a communication portion between the filler loading space and the filler injection passage after loading the filler into the filler loading space. 13. The filling layer repair method for a slab type track according to Item 12 . A filling layer repair method for a slab type track using the repair formwork according to claim 2,
a removal step of removing the filling layer horizontally from the outer periphery to a predetermined depth;
Formwork installation in which the repair formwork is installed so as to close the open side of the gap created between the roadbed concrete and the track slab by the removal process in order to define the filler loading space. process and
a filler injection step of injecting the liquid filler into the filler injection passage and loading it into the filler loading space;
In the state before use, the tape formwork includes an inner release paper for the upper side that covers the adhesive layer provided on the one surface on the upper side of the tape base material, and an inner release paper for the upper side that covers the adhesive layer provided on the one surface on the upper side of the tape base material, and and an outer release paper for the lower side that covers the adhesive layer provided on the other surface, and the outer release paper has a plurality of cut lines extending along the longitudinal direction of the tape at intervals in the tape width direction. It is set up as
The formwork installation step is
a positioning step of marking the upper surface of the roadbed concrete directly below the side surface of the track slab;
Remove the lower end of the outer release paper along the cut line corresponding to the height from the upper surface of the roadbed concrete to the lower surface of the track slab, and direct the lower part of the tape formwork toward the inside of the track slab. a roadbed side attaching step of aligning the lower edge of the outer release paper with the mark and attaching the tape formwork to the upper surface of the roadbed concrete;
A slab side attaching step of removing the inner release paper, bending the tape formwork into an L-shape, and adhering the upper part of the tape formwork to the side surface of the track slab. Filling layer repair method.

Images