JP6286234B2 - Slab track formwork and slab track filling layer repair method - Google Patents

Description

  The present invention relates to a slab track repair form and a slab track filling layer repair method, and more particularly, a repair form that defines a space in which a filler is reloaded when the filling layer is repaired. Further, the present invention relates to a filling layer repair method for a slab type track using the form for repair.

  As a railroad track, it has a filling layer of CA mortar (cement asphalt mortar) formed on roadbed concrete, and a concrete track slab installed on the filling layer, and the rail is fastened on the track slab. A slab type track is known (for example, Patent Documents 1 and 2).

  The outer peripheral part where the CA mortar filler layer is exposed to the outside accelerates deterioration due to frost damage caused by repeated freezing and thawing of moisture that has penetrated the filler layer, so that the outer peripheral part needs repair in a relatively short period of time. Become.

  The filling layer is repaired by removing the outer peripheral portion of the filling layer to a predetermined depth in the horizontal direction, and filling the gap formed between the roadbed concrete and the track slab with the new filling material. As a method of repairing the filling layer, a filling bag having flexibility and liquid tightness is pushed into the gap, a filling agent is injected into the filling bag to inflate the filling bag, and the filling bag is used like a sandbag. A method of filling a filler between the roadbed concrete and the track slab is known. Furthermore, a sealed space (filler reloading space) is defined by the filled bag on the back side of the filling bag, a filler injection hole penetrating the track slab in the vertical direction is formed, and liquid is supplied to the sealed space from the filler injection hole. A method of injecting a filler is also known (for example, Patent Document 2).

  As another method of repairing the filling layer, there is a method of closing the opening to the outside of the gap formed between the roadbed concrete and the track slab with a wooden frame and injecting a liquid filler into the closed gap. .

JP 2002-167421 A JP 2012-180634 A

  In the method of injecting the filler into the sealed space defined on the back side of the filling bag, the filler is applied to the track slab so that the liquid filler can be reliably repaired throughout the sealed space. It is necessary to open the injection hole, and the man-hour is increased correspondingly, and the time required for repair becomes longer.

  In the method of injecting the filler into the gap closed by the wooden frame, the liquid filler spreads throughout the sealed space by setting the filler injection hole at an appropriate position, etc., and good repair is performed, A wooden frame must be installed at the repair site, and the wooden frame must be disassembled after the filler has hardened, which requires much time for repair.

  In particular, since the repair work for the filling layer of the railway slab type track must be performed from the last train to the first power generation car, the long time required for repair is a major problem to be solved.

  The problem to be solved by the present invention is to repair the filling layer quickly and reliably.

  In the slab track repair form according to the present invention, a filling layer (3) is provided between a roadbed concrete (1) and a track slab (5), and a rail (9) is provided on the track slab (1). The space (S) formed between the roadbed concrete (1) and the track slab (5) by removing the filling layer (3) of the fastened slab track from the outer periphery to a predetermined depth in the horizontal direction. ) On the open side to the outside, and a repair mold (30, 60) that defines a filler reloading space (21) in which the filler (P) is reloaded on the back side of the gap (S). ), Defining an airtight chamber (34) therein, inflated by the fluid injected into the airtight chamber (34), and pressing the lower surface (32A) against the upper surface (1A) of the roadbed concrete (1), The upper surface (32B) is the lower surface (5A) of the track slab (5). A flexible plastic bag body (32) to be pressed, joined to the bag body (32), penetrates the bag body (32) laterally and opens to the outside at one end, and to the other end. A filler loading passage (52) opened toward the filler reloading space (21) is demarcated and elastically deformed in the diameter-reducing direction by the fluid pressure of the hermetic chamber (34), and the filler loading passage ( 52) and a filler injection cylinder (50) made of a flexible material.

  According to this configuration, the bag (32) can be filled with the filler reload space (21) simply by installing the repair form (30, 60) at an appropriate location and inflating the bag (32) with fluid pressure. Since the repair mold (30, 60) can be removed from the installation part simply by releasing the fluid pressure of the bag (32) and deflating the bag (32), The time required for repairing the filling layer (5) can be shortened as compared with the case where the wooden frame is assembled or the wooden frame is disassembled.

  Filler injection into the filler reloading space (21) is performed by the filler loading passage (52) defined by the filler injection cylinder (50) provided in the repair mold (30, 60). Thus, the filler (P) can be filled evenly throughout the filler reloading space (21) without opening the filler injection hole in the track slab (5). In addition, the filler loading passageway (52) by the filler injection cylinder (50) is closed by elastically deforming the filler injection cylinder (50) in the diameter-reducing direction by the fluid pressure in the hermetic chamber (34). When the filler injection nozzle (100) is inserted into the filler loading passage (52), the filler injection nozzle (100) is expanded and communicated, and the filler injection nozzle (100) is extracted to return to the original closed state. Since it returns, it can be opened and closed without any other work. This also shortens the time required for repairing the filler layer, and does not cause the filler (P) to leak due to forgetting to close the filler loading passage (52).

  The slab track repair mold according to the present invention is preferably further provided with a protruding piece (42) which is joined to the lateral intermediate portion of the upper surface (32B) of the bag body (32) and protrudes upward. Have

  According to this configuration, the insertion of the bag (32) into the gap (S) may be performed until the protruding piece (42) contacts the outer wall surface (5B) of the track slab (5). Positioning) or a stopper, and the insertion amount of the bag body (32) with respect to the gap (S) becomes an appropriate value without excess or deficiency.

  In the repair form of the slab type track according to the present invention, preferably, the protruding piece (42) can be bent with a joint (32A) with the bag body (32) as a folding line.

  According to this configuration, the projecting piece (42) is bent toward the gap (S), whereby the seal between the upper surface (32B) of the bag body (32) and the lower surface (5A) of the track slab (5). Acts as a sealing piece.

  In the slab track repair mold according to the present invention, preferably, the bag body (32) is a flat plate having higher rigidity than the bag body (32) on the side defining the filler reloading space (21). The core material (40) is joined.

  According to this configuration, most of the outer wall surface of the filler (P) filled and cured in the filler reload space (21) becomes a clean flat surface.

  In the slab type track filling layer repair method according to the present invention, a filling layer (3) is provided between the roadbed concrete (1) and the track slab (5), and a rail (9) is provided on the track slab (5). A method of repairing the filling layer (5) of the fastened slab type track, wherein the filling layer (5) is removed from an outer periphery to a predetermined depth in a horizontal direction, and the roadbed is obtained by the removing step. Formwork installation in which the repair formwork (30, 60) according to the above-described invention is installed on the part of the open side to the outside of the gap (S) formed between the concrete (1) and the track slab (5) A step of sealing a fluid into the airtight chamber (34) and pressing the lower surface (32A) of the bag body (32) against the upper surface (1A) of the roadbed concrete (1) by the fluid pressure of the airtight chamber (34) And the upper surface (32B) of the bag (32) Fluid pressure sealing step of pressing the lower surface (5A) of the track slab (5) and defining a filler reloading space (21) on the back side of the bag body (32), and the repair mold (30 60), the filler injection nozzle (100) is inserted into the filler injection cylinder (50), and a liquid filler is inserted into the filler reloading space (21) by the filler injection nozzle (100). (P) is injected, and after the injection is completed, the filler injection nozzle (100) is extracted from the filler injection cylinder (50), and after the hardening of the filler (P), the airtight chamber (34) discharging the fluid and removing the repair mold (30, 60).

  According to this construction method, the bag (32) is filled with the filler reload space (21) simply by installing the repair form (30, 60) at an appropriate location and inflating the bag (32) with fluid pressure. Since the repair mold (30, 60) can be removed simply by removing the fluid pressure of the bag (32) and deflating the bag (32), the wooden mold can be removed at the construction site. The time required for repairing the filling layer (5) can be shortened as compared with the case where a frame is assembled or the wooden frame is disassembled.

  According to the repair form of the slab type track and the filling layer repair method of the slab type track according to the present invention, the bag form is filled simply by installing the repair form at an appropriate location and inflating the bag body by fluid pressure. It acts as a mold that defines the agent reload space, and the repair mold can be removed simply by draining the fluid pressure of the bag and deflating the bag, thereby shortening the time required to repair the filling layer .

  In addition, the filler loading passage by the filler injecting cylinder is closed by elastic deformation of the filler injecting cylinder in the direction of diameter reduction by the fluid pressure in the hermetic chamber, and the filler injecting nozzle is placed in the filler loading passage. By simply inserting it, it expands and communicates, and when the filler injection nozzle is pulled out, it returns to its original closed state and can be opened and closed without any other work. The time required for the repair of the layer can be shortened, and the repair of the filling layer is surely performed.

The perspective view which shows the outline | summary of the slab type | formula track | orbit where the formwork for repair by this invention is used and the filling layer repair method by this invention is applied. 1 is a perspective view showing one embodiment of a repair mold according to the present invention. Sectional drawing which shows the initial state of the mold for repair by this embodiment (sectional drawing along line III-III of FIG. 2). Sectional drawing (cross-sectional view along line III-III of FIG. 2) which shows the air enclosure state (before seal piece bending) of the mold for repair by this embodiment. Sectional drawing which shows the air enclosure state (after a seal piece bending) of the mold for repair by this embodiment The front view of the principal part of the mold for repair by this embodiment. Explanatory drawing which shows the process of the first half of the filling layer repair method of the slab type track | orbit by this invention. Explanatory drawing which shows the process of the latter half of the filling layer repair construction method of the slab type track | orbit by this invention. The perspective view which shows other embodiment of the mold for repair by this invention.

  First, an outline of a slab type track in which a repair form according to the present invention is used and a filling layer repair method according to the present invention is applied will be described with reference to FIG.

  The slab type track has a filling layer 3 of CA mortar (cement asphalt mortar) formed on the roadbed concrete 1 and a concrete track slab 5 installed on the filling layer 3. The rail 9 is fastened by the fastener 7. The track slab 5 is a precast product having a rectangular plate shape (a rectangular shape) having a length of 4900 mm, a width of 2220 mm, and a thickness of 190 mm. In this case, the thickness (height) of the filling layer 3 may be about 50 mm. In the slab type track, a plurality of the above-described track slabs 5 are arranged in the rail laying direction.

  Positioning recesses 11 are formed at both ends of the track slab 5 in the longitudinal direction. On the roadbed concrete 1, a cylindrical or semi-cylindrical positioning projection 13 is formed so as to be engaged with the recess 11.

  The protrusion 13 has a cylindrical or semi-cylindrical shape with an outer diameter of about 450 mm. The recess 11 is substantially semicircular in plan view and has an inner diameter of about 500 mm that is larger than the outer diameter of the protrusion 13. The recess 11 and the protrusion 13 engage concentrically with a gap. This gap is an annular or substantially semi-annular space defined by an inner diameter-outer diameter difference between the inner peripheral surface of the recess 11 and the outer peripheral surface of the protrusion 13, and is on the roadbed concrete 1 side. It is filled with the filling layer 19 leaving the drainage passage 17 at the bottom. Thereby, the recessed part 11 and the projection part 13 act as a positioning part which restrains (regulates) the horizontal movement of the track slab 5 on the roadbed concrete 1 in cooperation with the filling layer 19.

  Next, one embodiment of a repair mold according to the present invention will be described with reference to FIGS.

  The repair mold 30 is used for repairing the filling layer 3 and includes a bag body 32 and a filler injection cylinder 50.

  As shown in FIGS. 2 and 3, the bag body 32 is a flexible and elastic airtight bag body made of a resin film such as a polyurethane film, and has a rectangular cross section of about 50 mm × 50 mm in length and width. It has a planar shape and is an elongated (about 3000 mm) linear shape extending along the side of the filling layer 3. The bag body 32 defines an airtight chamber 34 therein, and forms a form of a balloon structure that is inflated by a gas such as air injected into the airtight chamber 34.

  As shown in FIG. 2, an uneven engagement tool 44 is attached to the end portion 32 </ b> C of the bag body 32 to releasably connect the bag bodies 32 that are abutted in the longitudinal direction of the track slab 5. It has been.

  The bag body 32 is formed with a gas injection part 36 with a valve. The gas injection unit 36 is connected by a vinyl pipe 38 to a high-pressure gas source such as an air compressor (not shown) or a compressed gas cylinder.

  When the filling layer 3 is repaired, the bag body 32 has a gap S formed between the roadbed concrete 1 and the track slab 5 by removing the filling layer 3 horizontally from the outer periphery to a predetermined depth (about 100 mm). It is installed along the extending direction of the outer peripheral edge of the filling layer 3 at a site on the open side to the outside (outward) (see FIG. 7A). And the bag body 32 is pressed against the upper surface 1A of the roadbed concrete 1 as shown in FIG. 4 by inflating with the gas injected into the airtight chamber 34 from the gas injection part 36, and the upper surface 32B is pressed against the lower surface 5A of the track slab 5 to define a filler reload space 21 in which the filler P (see FIG. 8G) is reloaded on the inner side of the gap S, and at the same time, the roadbed concrete 1 and the track. It is fixed to the slab 5 by friction.

  The fixing strength of the bag body 32 with respect to the roadbed concrete 1 and the track slab 5 is a degree that ensures that the bag body 32 does not escape from the gap S due to the pressure of the filler P loaded in the filler reloading space 21. Good. In addition to the increase in the pressure of the gas injected into the hermetic chamber 34, the fixing strength can be increased by forming the lower surface 32A and the upper surface 32B of the bag body 32 into a rough surface pattern.

  On the inner surface of the side where the bag body 32 defines the filler reloading space 21, that is, the inner side of the wall portion where the bag body 32 faces the filler reloading space 21, hard plastic such as polypropylene, in other words, the bag body 32. A core member 40 made of a flat plate-like hard plate having a higher rigidity is joined by heat welding or the like except for the arrangement portion of the filler injection cylinder 50.

  A protruding piece made of a resin film such as a polyurethane film protruding upward from the upper surface 32B is provided at an intermediate portion (1/2 position) of the upper surface 32B of the bag body 32 in the lateral direction (insertion direction with respect to the gap S of the bag body 32). 42 is joined by thermal welding or the like. The protruding piece 42 serves as a guide for the amount of insertion when the bag body 32 is inserted into the gap S, a positioning piece, or a stopper piece. In addition, the protrusion piece 42 has flexibility and elasticity as a whole, and as shown in FIG. 5, the joining portion 42 </ b> A with the bag body 32 can be bent as a folding line. Function.

  As shown in FIG. 3, the filler injection cylinder 50 is a flexible and elastic cylindrical body (initial shape) made of a resin film such as a polyurethane film. It is provided at a plurality of locations in the direction. Each of the filler injection cylinders 50 extends through the inside of the bag body 32 in the lateral direction (in the insertion direction with respect to the gap S of the bag body 32), and both ends thereof are thermally welded to the bag body 32, respectively. Airtightly joined. Thereby, the filler injection cylinder 50 defines a filler loading passage 52 that opens toward the outside (outside) at one end and opens toward the filler reloading space 21 at the other end. Yes. The inner diameter of the filler injection cylinder 50 is slightly larger than the outer diameter of the filler injection nozzle 100 (see FIG. 5), and the length of the filler injection cylinder 50 is equal to the lateral dimension of the bag 32, Alternatively, it may be a little larger than the lateral dimension of the bag body 32.

  As shown in FIGS. 4 and 6, the filler injection cylinder 50 is elastically deformed in the reduced diameter direction by the gas pressure (internal pressure) of the hermetic chamber 34, and is elastically deformed in the reduced diameter direction. The filler loading passage 52 is closed so as to be deflated, that is, the communication of the filler loading passage 52 is blocked. This clogging is caused by the liquid filler P loaded in the filler reloading space 21, preferably the viscous filler P such as urethane resin, from the filler reloading space 21 through the filler loading passage 52 to the outside. Any liquid-tight blockage that does not leak is sufficient.

  Then, as shown in FIG. 5, the filler injection cylinder 50 is expanded by inserting the filler injection nozzle 100 into the filler loading passage 52, and passes through the filler injection nozzle 100. Is acceptable. When the filler injection nozzle 100 is withdrawn from the filler loading passage 52 in the insertion direction, the filler injection cylinder 50 is again reduced in the diameter reduction direction by the gas pressure in the hermetic chamber 34, as shown in FIG. To the original state of closing the filler loading passage 52 by elastic deformation.

  Next, one embodiment of the filling layer repair method using the repair mold 30 according to the present embodiment will be described with reference to FIGS. The filling layer repair method includes the steps shown in the following (1) to (5), and steps (1), (2),.

  (1) A removal step of removing the filling layer 3 from the outer periphery to a predetermined depth in the horizontal direction as shown in FIG.

  The removal step is performed over the entire circumference of the filling layer 3, and by this removal step, a laterally open space S is formed between the roadbed concrete 1 and the track slab 5 over the entire circumference of the filling layer 3.

  (2) As shown in FIG. 7B, the bag body 32 of the repair mold 30 is inserted into the gap S from the open side (outside) to the outside of the gap S, and the gap S is moved to the outside. The mold installation process which installs the repair mold 30 in the part of the open side.

  In the mold installation step of inserting the bag body 32 into the gap S, the gas is not sealed in the airtight chamber 34 and the bag body 32 is not inflated. May be performed until it contacts the outer wall surface 5B of the track slab 5. Thereby, the protruding piece 42 becomes a positioning piece or a stopper piece, and the insertion amount of the bag body 32 with respect to the gap S becomes an appropriate value without excess or deficiency.

  When the insertion of the bag body 32 into the gap S is completed, as shown in FIG. 7C, the protruding piece 42 is bent to the side of the gap S with the joining portion 42A as a folding line. It is located below the track slab 5.

  (3) A fluid pressure sealing step of injecting pressurized air as high-pressure gas into the hermetic chamber 34 of the bag body 32 and sealing the pressurized air into the hermetic chamber 34 as shown in FIG.

  When the pressurized air is sealed in the airtight chamber 34, the bag body 32 expands like a balloon, and the lower surface 32 </ b> A of the bag body 32 is pressed against the upper surface 1 </ b> A of the roadbed concrete 1 by the air pressure of the airtight chamber 34. Is pressed against the lower surface 5A of the track slab 5 in the gap S portion.

  As a result, the bag body 32 is fixed to the roadbed concrete 1 and the track slab 5 by friction, and at the same time, the filler reloading space 21 is defined on the back side of the bag body 32. The wall portion where the bag body 32 faces the filler reloading space 21 has a vertical flat surface due to the core member 40.

  The seal between the lower surface 32A of the bag body 32 and the upper surface 1A of the roadbed concrete 1 is such that the lower surface 32A of the flexible bag body 32 follows the surface shape of the upper surface 1A of the roadbed concrete 1 by the air pressure of the airtight chamber 34. It is appropriately performed over the entire area by being in close contact with 1A. The seal between the upper surface 32B of the bag body 32 and the lower surface 5A of the track slab 5 is such that the upper surface 32B of the flexible bag body 32 follows the surface shape of the lower surface 5A of the track slab 5 by the air pressure in the airtight chamber 34. Thus, it is appropriately performed over the entire area by being in close contact with the lower surface 5A. The protruding piece 42 that is bent and positioned below the track slab 5 is sandwiched between the upper surface 32B of the bag body 32 and the lower surface 5A of the track slab 5 by the air pressure of the airtight chamber 34.

  Further, when pressurized air is sealed in the hermetic chamber 34, the filler-injecting cylinder 50 is elastically deformed so as to be deflated in the reduced diameter direction. Thereby, the filler loading passage 52 is closed and the communication of the filler loading passage 52 is blocked.

  (4) As shown in FIG. 8 (E), the filler injection nozzle 100 is inserted into the filler injection cylinder 50 from the outside, that is, into the filler loading passage 52, and the filler injection nozzle 100 is inserted. By filling the filler reloading space 21 by pressure, a liquid, preferably viscous liquid filler P such as urethane resin is injected under pressure, and after the injection is completed, the filler injection nozzle 100 is extracted from the filler injection cylinder 50. Agent injection process.

  When the filler injection nozzle 100 is inserted into the filler loading passage 52 in the filler injection step, the filler injection cylinder 50 is expanded by elastic deformation, and the filler injection nozzle 100 does not require any other work. Is allowed to pass. Moreover, the inner peripheral surface of the filler injection cylinder 50 is pressed against the outer peripheral surface of the filler injection nozzle 100 by the air pressure of the hermetic chamber 34, and a seal is formed between the filler injection cylinder 50 and the filler injection nozzle 100. Is done naturally.

  If the filler P is uniformly injected into the entire filler reloading space 21, the pressure injection of the filler P by the filler injection nozzle 100 is terminated, and the filler injection nozzle 100 is placed in the filler injection cylinder 50. That is, it is extracted from the filler loading passage 52. When the filler injection nozzle 100 is extracted from the filler loading passage 52, the filler injection cylinder 50 is elastically deformed again in the direction of diameter reduction by the air pressure of the hermetic chamber 34, and closes the filler loading passage 52. Self-return to state. Thereby, the communication of the filler loading passage 52 is inevitably blocked without requiring other work, and the uncured (viscous) filler P filled in the filler reloading space 21 is filled with the filler loading passage. Leakage to the outside through 52 is prevented in advance.

  The protruding piece 42 is bent toward the space S, that is, toward the filler reloading space 21, and is sandwiched between the upper surface 32 </ b> B of the bag body 32 and the lower surface 5 </ b> A of the track slab 5 by the air pressure of the airtight chamber 34. Part of the filler P that is about to leak to the outside from between the upper surface 32B of the bag body 32 and the lower surface 5A of the track slab 5 enters between the bent protruding piece 42 and the upper surface 32B of the bag body 32. Then, the protruding piece 42 acts so as to press more strongly against the lower surface 5A of the track slab 5, and acts as a lip seal member having self-sealing properties. Thereby, the seal between the upper surface 32B of the bag body 32 and the lower surface 5A of the track slab 5 is more reliably performed, and the uncured filler P filled in the filler reloading space 21 leaks to the outside. Is prevented.

  (5) After hardening of the filler P in the filler reloading space 21, as shown in FIG. 8 (F), the air is discharged from the airtight chamber 34, and the bag body 32 is returned to its original state. The mold removing process of removing the repair mold 30 from between the roadbed concrete 1 and the track slab 5.

  By removing the repair form 30 between the roadbed concrete 1 and the track slab 5, the filling layer repair work is completed. Since the wall portion of the bag body 32 facing the filler reloading space 21 has become a vertical flat surface by the core material 40, the outer wall surface of the filler P filled and cured in the filler reloading space 21 is large. The part becomes a beautiful flat surface.

  As described above, according to the filling layer repairing method using the repair mold 30, the bag 32 can be filled only by installing the repair mold 30 at an appropriate location and inflating the bag 32 by air pressure. Since the repair mold 30 can be removed from the installation portion by acting as a mold for defining the reload space 21 and simply removing the air pressure of the bag 32 to deflate the bag 32, the wooden mold can be used at the repair site. There is no need to perform time-consuming work such as assembling or dismantling the wooden formwork. Thereby, the time required for repairing the filling layer 3 can be significantly shortened. Since the repaired formwork 30 that has been removed can be reused, it contributes to resource saving and improves the economic efficiency.

  Since the filler P is injected into the filler reload space 21 by the filler loading passage 52 defined by the filler injection cylinder 50 provided in the repair mold 30, the filler is injected into the track slab 5. The filler P can be filled evenly throughout the filler reloading space 21 without making holes.

  In addition, the filler loading passage 52 formed by the filler injection cylinder 50 has a simple structure, and is closed when the filler injection cylinder 50 is elastically deformed in the reduced diameter direction by the air pressure of the hermetic chamber 34. When the filler injection nozzle 100 is simply inserted into the loading passage 52, the filler injection nozzle 100 is expanded and communicated, and the filler injection nozzle 100 is pulled out to return to the original closed state, so other work is required. It can be opened and closed without any problem. This also shortens the time required for repairing the filler layer 3 and prevents the filler P from leaking to the outside due to forgetting to close the filler loading passage 52.

  For this reason, according to the filling layer repairing method using the repair mold 30 according to the present embodiment, the filling layer 3 can be repaired quickly and reliably. When the repair mold 30 is used, there is a test work example in which the repair work time is shortened to 1/10 as compared with the case where the wooden mold is used.

  In addition, as shown in FIG. 9, one end of the repair mold placed in the portion corresponding to the gap 23 (see FIG. 1) formed between the adjacent track slabs 5 is in the longitudinal direction of the bag body 32. It is only necessary to use a T-shaped repair mold 60 having an extended portion 62 that is connected to the intermediate portion and disposed in the gap 23. The entire repair mold 60 may be configured in the same manner as the repair mold 30 described above.

  Although the present invention has been described above with reference to preferred embodiments thereof, the present invention is not limited to such embodiments and can be deviated from the spirit of the present invention, as will be readily understood by those skilled in the art. It is possible to change appropriately within the range not to be.

  For example, the filler injection cylinder 50 is changed from the end portion toward the middle portion instead of the cylinder body so that the filler loading passage 52 is easily closed by the elastic deformation in the reduced diameter direction due to the gas pressure of the hermetic chamber 34. It may have a drum shape (reverse crown shape) having a small diameter. The filler P may be injected by a method in which the pressurized filler P is injected into the filler loading passage 52 by a hose or the like without using the filler injection nozzle 100 inserted into the filler loading passage 52. In this case, the filler P passes through the filler loading passage 52 while pushing and expanding the filler injection cylinder 50 by its injection pressure.

  The cross-sectional shape of the bag body 32 is not limited to a quadrangle, and may be a circle or the like. A sealing piece equivalent to the protruding piece 42 that acts as a lip seal member may be provided on the lower surface 32 </ b> A of the bag body 32. The airtight chamber 34 may be injected with a gas other than air, such as nitrogen gas, or a fluid such as water that is easily available at the repair site. The connection between the bag bodies 32 that are abutted in the longitudinal direction of the track slab 5 is performed by using the engagement of the uneven portion formed at the end of the bag body 32 or the connection portion of the bag body 32 instead of the uneven engagement tool 44. It may be performed by a band with a hook-and-loop fastener wound around the outer periphery.

  In addition, all the components shown in the above embodiment are not necessarily essential, and can be appropriately selected without departing from the gist of the present invention.

DESCRIPTION OF SYMBOLS 1 Subbase concrete 1A Upper surface 3 Filling layer 5 Track slab 5A Lower surface 5B Outer wall surface 7 Fastener 9 Rail 21 Filler reload space 23 Gap 30 Repair mold 32 Bag body 32A Lower surface 32B Upper surface 34 Airtight chamber 36 Core 40 Material 42 Protruding piece 42A Joint 50 Filler injection cylinder 52 Filler loading passage 60 Repair mold 100 Filler injection nozzle S Gaps

Claims (5)

A filling layer is provided between the roadbed concrete and the track slab, and the filling layer of the slab type track with a rail fastened on the track slab is removed from the outer periphery to a predetermined depth in the horizontal direction. A repair form which is installed on the open side to the outside of a gap formed between concrete and the track slab and defines a filler reloading space in which the filler is reloaded on the back side of the gap. ,
A bag made of a flexible material that defines an airtight chamber therein, is inflated by a fluid injected into the airtight chamber, has a lower surface pressed against the upper surface of the roadbed concrete, and an upper surface pressed against the lower surface of the track slab;
Joined to the bag body, penetrating the bag body in the lateral direction, opening to the outside at one end, defining a filler loading passage opened to the filler reloading space at the other end, A repair form having a filler injecting cylinder made of a flexible material that is elastically deformed in a reduced diameter direction by the pressure of fluid injected into the hermetic chamber and closes the filler loading passage.   The repair mold according to claim 1, further comprising a protruding piece that is bonded to the intermediate portion of the upper surface of the bag body and protrudes upward.   The repair mold according to claim 2, wherein the protruding piece can be bent with a joint portion with the bag body as a folding line.   The repair form according to any one of claims 1 to 3, wherein a flat core material having a rigidity higher than that of the bag body is bonded to a side of the bag body defining the filler reloading space. A filling layer is provided between the roadbed concrete and the track slab, and a method of repairing the filling layer of the slab type track in which a rail is fastened on the track slab,
A removal step of removing the filling layer from the outer periphery to a predetermined depth in a horizontal direction;
The formwork installation which installs the formwork for repair as described in any one of Claim 1 to 4 in the open | release side to the exterior of the space | gap formed between the said roadbed concrete and the said track slab by the said removal process. Process,
Fluid is sealed in an airtight chamber of the repair mold, and the lower surface of the bag of the repair mold is pressed against the upper surface of the roadbed concrete by the fluid pressure of the airtight chamber, and the upper surface of the bag is pressed against the upper surface of the track slab. A fluid pressure sealing step of pressing on the lower surface and defining a filler reloading space on the back side of the bag,
A filler injection nozzle is inserted into the filler injection cylinder of the repair mold, and a liquid filler is injected into the filler reloading space by the filler injection nozzle. After the injection is completed, the filler injection is performed. A filler injection step of extracting the filler injection nozzle from the cylinder for use;
A slab-type track filling layer repairing method comprising: a mold removing step for discharging fluid from the hermetic chamber after the filler is cured and removing the repair mold.

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