JP6452554B2 - Packing layer forming bag - Google Patents

Description

  The present invention relates to a filling layer forming bag body of a slab type track, and more specifically, between a positioning protrusion formed on a roadbed concrete and a positioning recess formed on a slab plate. The present invention relates to a bag body for forming a packed bed at a gap.

  As a railroad track, it has a filler layer made of CA mortar (cement asphalt mortar) formed on roadbed concrete, and a concrete slab plate installed on the filler layer, and the rail is on the slab plate. The fastened slab type track is known (for example, patent documents 1 and 2). The slab plate is a precast product having a rectangular plate shape with a length of 4900 mm, a width of 2220 mm, and a thickness of about 190 mm. In the slab type track, a plurality of slab plates are arranged side by side in the rail laying direction.

  In the slab type track, recesses are formed at both ends in the longitudinal direction of the slab plate, protrusions are formed on the roadbed concrete, and the recesses and protrusions engage with each other to cooperate with the filling layer described later. Thus, the lateral movement of the slab plate on the roadbed concrete is restricted (restricted).

  The projection has a cylindrical or semi-cylindrical shape with an outer diameter of about 450 mm, and the recess has a semicircular shape in plan view and has an inner diameter of about 500 mm larger than the outer diameter of the projection. A semi-circular gap formed between the outer peripheral surface of the recess and the inner peripheral surface of the recess is filled with a filler (filled layer) made of CA mortar, urethane resin, or the like.

  The operation of providing a filling layer at the gap between the projection and the recess (gap filling method) is to use the upper opening bag formed by sewing or bonding the nonwoven fabric as the gap. After the insertion, the bag body is shaped and bonded to the outer peripheral surface of the protrusion and the inner peripheral surface of the recess so that the bag body is substantially in close contact with the outer peripheral surface of the protrusion and the inner peripheral surface of the recess. When the shaping and adhesion of the bag is completed, the filler is poured into the bag from the upper opening, and the construction is completed by curing the filler.

JP 2002-167421 A JP2013-36303A

  Since the bag used in the conventional gap filling method is a bag made of a soft non-woven fabric and does not stand on its own, in the conventional method, after inserting the bag into the gap, the bag The troublesome manual work of shaping and bonding the bag body so as to be in close contact with the outer peripheral surface and the inner peripheral surface of the recess is necessary. If this manual operation is not performed reliably, a gap may be formed between the outer peripheral surface of the protrusion or the inner peripheral surface of the concave portion and the filling layer, and there is a possibility that poor formation of the filling layer may occur.

  The problem to be solved by the present invention is that in the construction of a slab type track, the work of providing a filling layer at the gap formed between the outer peripheral surface of the protrusion of the roadbed concrete and the inner peripheral surface of the concave portion of the slab plate It is to be able to do well and surely.

The present invention is a slab type track in which a slab plate is installed on a packed bed formed on roadbed concrete, and a rail is fastened on the slab plate, and is formed at both ends in the longitudinal direction of the slab plate. A filling layer forming bag used for providing a gap filling layer in a gap between a positioning recess and a positioning projection protrudingly formed on the roadbed concrete,
A bag body having a sealed structure formed of a nonwoven fabric having a filler filling port that is formed so as to constitute a sealed chamber having substantially the same shape as the space of the gap portion, and that communicates with the sealed chamber. A bag body having an outer peripheral surface portion that contacts the inner peripheral surface and an inner peripheral surface portion that contacts the outer peripheral surface of the positioning projection;
An X-shaped core body formed by crossing two belt-shaped members at the respective centers to form an X shape provided along the outer peripheral surface portion;
And a protruding core that is connected to both longitudinal ends of one strip member and both longitudinal ends of the other strip member and projects toward the inner peripheral surface portion. A forming bag.

  Further, in the present invention, the protruding core body is a horizontal core body that linearly extends from both longitudinal end portions of the one band-shaped member and both longitudinal end portions of the other strip-shaped member toward the inner peripheral surface portion. It is characterized by being.

Further, the present invention provides a longitudinal end of one belt-like member and a longitudinal end of the other belt-like member arranged in the vertical direction when arranged in the gap, and one of the longitudinal members. Provided in a straight line between the other longitudinal end of the belt-like member and the other longitudinal end of the other belt-like member arranged in the up-down direction when arranged in the gap. A first vertical core;
And a second vertical core provided in a straight line between the ends on the inner peripheral surface side of the two horizontal cores arranged in the vertical direction when arranged in the gap.

In the present invention, the bag body is
A first end surface portion provided between one end portion in the circumferential direction of the outer peripheral surface portion and one end portion in the circumferential direction of the inner peripheral surface portion;
A second end surface portion provided between the other circumferential end of the outer peripheral surface portion and the other circumferential end of the inner peripheral surface portion;
An upper surface provided between an end located on the upper side of the outer peripheral surface and an end located on the upper side of the inner peripheral surface when disposed in the gap;
A lower bottom surface portion provided between an end portion located on the lower side of the outer peripheral surface portion and an end portion located on the lower side of the inner peripheral surface portion when disposed in the gap portion;
At least one filler filling port is provided at each of both ends in the circumferential direction.

  Moreover, this invention is characterized by the said filler filling port being provided in the said 1st end surface part and the said 2nd end surface part, respectively.

  The present invention also provides the filling from the sealed chamber to the external space when the pressure in the sealed chamber exceeds a predetermined pressure when the filler is filled in the bag body and is filled with the filler in the bag body. It includes a check valve that allows the material to flow out and prevents the external space from flowing into the sealed chamber regardless of the pressure in the sealed chamber.

  In the invention, it is preferable that the bag body has a hollow tubular member made of a foam material provided below the lower bottom surface portion.

  In the invention, it is preferable that the bag main body has a fixed string having one end fixed to both ends in the circumferential direction of the inner peripheral surface portion.

  Further, the present invention is characterized in that a through-hole through which a filler filled in the bag body can flow out is provided in at least one of the outer peripheral surface portion and the inner peripheral surface portion.

  According to the present invention, an X-shaped core body is provided along the outer peripheral surface portion of the bag body, and a protruding core body projecting toward the inner peripheral surface portion is connected to each end portion of the X-shaped core body. Is done. With the X-shaped core body and the protruding core body, the bag body is brought into close contact with the outer peripheral surface of the protrusion and the inner peripheral surface of the recess only by inserting the filling layer forming bag body into the gap. This eliminates the troublesome manual work of shaping and bonding the bag main body so that the bag main body is in close contact with the outer peripheral surface of the protrusion and the inner peripheral surface of the recess, and the filling layer forming bag body is used as the gap portion. The work of fitting becomes easy.

  Moreover, according to this invention, the horizontal core body extended linearly toward each inner peripheral surface part from each edge part can be used as a protruding core body.

  Moreover, according to this invention, a wrinkle generate | occur | produces in an outer peripheral surface part by tensioning an outer peripheral surface part and an inner peripheral surface part to an up-down direction by having the 1st and 2nd vertical core body provided linearly in an up-down direction. To prevent the occurrence of wrinkles on the inner peripheral surface portion and improve the adhesion between the inner peripheral surface portion and the outer peripheral surface of the protrusion. it can.

  According to the invention, at least one filler filling port is provided at each of both ends in the circumferential direction of the bag body. Thereby, when the gap portion is varied in the radial direction, the filler filling port provided at the end surface portion on the wide gap side is selected from the filler filling ports provided at both ends in the circumferential direction. The filler can be filled with a relatively low injection pressure. In addition, when the gap cannot be sufficiently filled on the narrow side, it can be filled by pouring from the filler filling port provided on the narrow side.

  Moreover, according to this invention, a filler filling port can be provided in a 1st end surface part and a 2nd end surface part, respectively.

  Moreover, according to this invention, it has a hollow tubular member which consists of a foam material provided below a lower bottom face part. This tubular member can be used for drainage.

  Moreover, according to this invention, a bag main body has the fixed string by which the one end was fixed to the circumferential direction both ends of an internal peripheral surface part, respectively. When two filling layer forming bags are inserted into the gap around the protrusion, the fixing string provided on one filling layer forming bag and the other filling layer forming bag The fixed string 62 provided is bound on both sides in the circumferential direction. Since the fixed string is fixed to both ends in the circumferential direction of the inner peripheral surface portion, the bag body inner peripheral surface portion is connected to the protruding portion by binding the two packing layer forming bags with the fixed string as described above. It can be made to adhere more closely to the outer peripheral surface.

  According to the present invention, the through hole through which the filler filled in the bag body can flow out is provided in at least one of the outer peripheral surface portion and the inner peripheral surface portion. The bag main body is bonded to the outer peripheral surface of the protrusion and the inner peripheral surface of the recess by the outflow filler, and is firmly fixed.

It is a perspective view which shows the outline | summary of the slab type | formula track | orbit in which the bag body for packed bed formation by this invention is used. It is a perspective view which shows 1st Embodiment of the bag body for filling layer formation of the slab type track | orbit by this invention. It is sectional drawing (sectional drawing along line III-III of FIG. 2) of the filling layer forming bag body by this embodiment. It is a perspective view which shows only the X-shaped core body 48 and the horizontal core body 49. FIG. 4 is a perspective view showing only an X-shaped core body 48, a horizontal core body 49, a first vertical core body 50, and a second vertical core body 51. FIG. 4 is a perspective view showing only an X-shaped core body 48, a horizontal core body 49, a first vertical core body 50, a second vertical core body 51, and an arc-shaped core body 46. FIG. It is a perspective view which shows the first process of the gap part filling layer construction method using the bag body for filling layer formation by this embodiment. It is a perspective view which shows the next process of the gap | interval part filling layer construction method using the bag body for filling layer formation by this embodiment. It is a perspective view which shows the completion state of the gap part filling layer part constructed | assembled by the construction method by this embodiment. It is a perspective view which shows 2nd Embodiment of the bag body for filling layer formation of the slab type | formula track | orbit by this invention. It is a mimetic diagram showing the state where fixed string 62 was bound. It is a perspective view which shows 3rd Embodiment of the filling body formation bag body of the slab type | formula track | orbit by this invention. It is sectional drawing which shows the vicinity in which the non-return valve 70 was provided. It is a schematic diagram which shows the state which has arrange | positioned the lid-shaped jig 80. FIG. It is sectional drawing of the state which has arrange | positioned the tube 90. FIG.

  First, the outline of the slab type track | orbit in which the bag body for packed bed formation by this invention is used is demonstrated with reference to FIG.

  The slab type track has a packed bed 3 made of CA mortar (cement asphalt mortar) formed on the roadbed concrete 1 and a concrete slab plate 5 installed on the packed bed 3. A rail 9 is fastened by a fastener 7 on the top. The slab plate 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 about 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 slab plates 5 are arranged side by side in the rail laying direction.

  Recesses 11 for positioning are formed at both ends in the longitudinal direction of the slab plate 5. 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 15 (see FIG. 7). The gap 15 is a substantially semi-circular space in plan view defined by an inner diameter-outer diameter difference between the inner circumferential surface of the recess 11 and the outer circumferential surface of the protrusion 13.

  The gap 15 is filled with a gap filling layer 19 leaving a drainage passage 17 on the roadbed concrete 1 side (bottom). Thereby, the recessed part 11 and the projection part 13 act as a positioning part which restrains (regulates) the movement of the slab board 5 on the roadbed concrete 1 in cooperation with the filling layer 19 for gaps.

  Next, 1st Embodiment of the bag body for filling layer formation of this invention is described with reference to FIGS.

  As shown in FIGS. 2 and 3, the filling layer forming bag 40 according to this embodiment is a non-woven fabric formed so as to constitute a sealed chamber 41 having substantially the same shape as the space of the gap 15. 43A and non-woven fabric 43B, a bag body 42 having a hermetically sealed structure, and a cylindrical balance made of non-woven fabric that is sewn on the upper surface of the bag body 42 and constitutes a filler filling port 45 communicating with the sealed chamber 41 It has a filler filling port member 44, and an X-shaped core body 48 and a horizontal core body 49A sewn between the two nonwoven fabrics 43A and 43B of the bag body 42. In addition, in FIG. 3, the code | symbol S has shown the stitching | joining part (seam) of nonwoven fabric 43A and 43B.

  The bag body 42 constitutes the sealed chamber 41 having substantially the same shape as the space 15 of the gap portion 15 as described above. The curved inner peripheral surface portion 42E provided between the inner peripheral edge of the upper surface portion 42A and the inner peripheral edge of the lower bottom surface portion 42B, and the outer peripheral edge of the upper surface portion 42A and the outer peripheral edge of the lower bottom surface portion 42B. The curved outer peripheral surface portion 42F, the rectangular end surface portion 42C provided between the one circumferential end portion of the inner peripheral surface portion 42E and the one circumferential end portion of the outer peripheral surface portion 42F, and the other circumferential direction of the inner peripheral surface portion 42E. It consists of six surface portions including a rectangular end surface portion 42D provided between the end portion and the other circumferential end portion of the outer peripheral surface portion 42F.

  A filler filling port member 44 is provided at the end of the upper surface portion 42A on the end surface portion 42C side. The shapes of the inner peripheral surface portion 42E and the outer peripheral surface portion 42F are both semicircular peripheral surface shapes, and the radius of the outer peripheral surface portion 42F is larger than the radius of the inner peripheral surface portion 42E. The inner peripheral surface portion 42E contacts the outer peripheral surface of the protruding portion 13 when the filling layer forming bag body 40 is inserted in the gap portion 15, and the outer peripheral surface portion 42F is the filling layer forming bag in the gap portion 15. When the body 40 is inserted, it contacts the inner peripheral surface of the recess 11. The inner peripheral surface portion 42E and the outer peripheral surface portion 42F have a rectangular shape when the bag body 42 is deployed.

  The upper surface portion 42A, the lower bottom surface portion 42B, the end surface portions 42C and 42D, the inner peripheral surface portion 42E, and the outer peripheral surface portion 42F are each composed of two non-woven fabrics 43A and 43B, and the edges of the respective surface portions are sewn together. Alternatively, the bag body 42 is formed by bonding the edges with an adhesive.

  Non-woven fabrics 43A and 43B are cloth-like materials in which fibers made of synthetic resin or the like are oriented in one direction or randomly, and the fibers are bonded together by entanglement, fusion, adhesion, and the like. What is necessary is just to be comprised with the material which has intensity | strength which is not damaged when the filling filler with which it filled hardens | cures, and does not inhibit hardening of a filler. As the fiber material constituting the nonwoven fabrics 43A and 43B, various synthetic resins such as polyester resin, nylon resin, polypropylene resin, polyethylene resin, polyurethane resin, acrylic resin, PET (polyethylene terephthalate) resin, and melamine resin can be used. These synthetic resins may be used alone or in combination of two or more. The orientation of the fibers and the type of bond between the fibers are not particularly limited.

As nonwoven fabric 43A, 43B used for the bag main body 42 of this invention, although a fabric weight of 100-500 g / m < ² > can be used, for example, it is not limited to this range.

  FIG. 4 is a perspective view showing only the X-shaped core body 48 and the horizontal core body 49. In order to make the configuration of the X-shaped core body 48 and the horizontal core body 49 easier to understand, it is a diagram showing only the X-shaped core body 48 and the horizontal core body 49 through the bag body 42. The X-shaped core body 48 is made of a resin having flexibility, has an X shape in which two flat strips intersect each other at the central portion 48e, and is provided on the outer peripheral surface portion 42F that contacts the inner peripheral surface of the recess 11. ing. In the present embodiment, the X-shaped core body 48 is disposed and sewn between the nonwoven fabrics 43A and 43B of the outer peripheral surface portion 42F, but may be disposed and sewn on the outer surface of the nonwoven fabric 43A. It may be arranged and sewn on the inner surface of 43B. Moreover, you may adhere | attach with the adhesive agent instead of sewing.

  The X-shaped core body 48 is provided so as to follow the curved shape of the outer peripheral surface portion 42 </ b> F, and retains the curved shape of the outer peripheral surface portion 42 </ b> F when the filling layer forming bag body 40 is inserted into the gap portion 15. As described above, the outer peripheral surface portion 42F has a rectangular shape in a state where the bag main body 42 is unfolded, and the X-shaped core body 48 is sewn to the outer peripheral surface portion 42F along the rectangular diagonal line. The X-shaped core body 48 is preferably sized so that the four end portions 48a, 48b, 48c, and 48d reach the four corners of the rectangular outer peripheral surface portion 42F, respectively.

  The shape along the curved shape of the outer peripheral surface portion 42F may be formed by overlapping two flat strips at the central portion and bonding the overlapped portions, or integrally formed in an X shape. It may be. Moreover, in order to make the shape along the curved shape of the outer peripheral surface portion 42F, for example, an uncurved belt-like flat plate may be plastically deformed by a press die or the like, or may be previously formed into a shape along the curved shape.

  By making the shape along the curved shape of the outer peripheral surface portion 42F, the X-shaped core body 48 maintains the curved shape of the outer peripheral surface portion 42F, and when the filling layer forming bag body 40 is inserted in the gap portion 15, The outer peripheral surface portion 42F is in close contact with the inner peripheral surface of the recess 11. The two lower ends of the X-shaped core body 48 serve as legs, support the entire bag body 42, and in cooperation with the outer peripheral surface portion 42F closely contacting the inner peripheral surface of the recess 11, It can stand by itself in the gap 15.

  The horizontal core body 49 is made of a flexible resin and has a wire shape. The horizontal core body 49 extends from the two end portions 48a, 48b; 48c, 48d arranged vertically on the X-shaped core body 48 toward the inner peripheral surface portion 42E. It is four linear cores. These four horizontal cores 49 are projecting cores.

  The outer peripheral surface portion 42F has a semi-cylindrical shape, and the outer peripheral surface portion 42F is inserted when the filling layer forming bag body 40 is inserted in the gap portion 15 while the curved shape of the outer peripheral surface portion 42F is held by the X-shaped core body 48. Both end portions in the circumferential direction are positioned so as to sandwich the center of the protrusion 13. Further, both ends in the circumferential direction of the inner peripheral surface portion 42 </ b> E are pressed against the outer peripheral surface of the projecting portion 13 by the horizontal core body 49 at a position sandwiching the center of the projecting portion 13. Then, the inner peripheral surface portion 42E is pressed against and closely contacts the outer peripheral surface of the protrusion 13 over the entire circumferential direction.

  Thereby, the X-shaped core body 48 is provided on the outer peripheral surface portion 42F, and the horizontal core body 49 extending from the respective end portions 48a, 48b; 48c, 48d of the X-shaped core body 48 is provided. The inner peripheral surface portion 42E of the bag main body 42 is in close contact with the outer peripheral surface of the protruding portion 13 and the outer peripheral surface portion 42F is in close contact with the inner peripheral surface of the concave portion 11 simply by inserting 40 into the gap portion 15. Therefore, the troublesome manual work of adhering to the outer peripheral surface of the protruding portion 13 and the inner peripheral surface of the concave portion 11 becomes unnecessary.

  In the present embodiment, the protruding core body extending from each end portion 48a, 48b, 48c, 48d of the X-shaped core body 48 toward the inner peripheral surface portion 42E is described as a linear horizontal core body 49. As long as both end portions in the circumferential direction of the inner peripheral surface portion 42E can be pressed against the outer peripheral surface of the protruding portion 13, the inner peripheral surface portion 42E is not limited to a linear shape, and may be a curved shape or a broken line shape.

  The bag main body 42 further includes a linear first vertical core 50 and an inner peripheral surface 42E side of the horizontal core 49 provided between two end portions 48a, 48b; 48c, 48d arranged above and below the X-shaped core 48. The second vertical core body 51 is provided between the end portions of the two. FIG. 5 is a perspective view showing only the X-shaped core body 48, the horizontal core body 49, the first vertical core body 50, and the second vertical core body 51. In order to make the configuration of the first vertical core body 50 and the second vertical core body 51 easier to understand, the bag body 42 is transmitted, and the X-shaped core body 48, the horizontal core body 49, the first vertical core body 50, and the second vertical core body 50. It is a figure which shows only the core 51. FIG. The first vertical core body 50 and the second vertical core body 51 are made of a resin having flexibility like the horizontal core body 49, are in a wire shape, and are sewn to the bag body 42. The first vertical core body 50 and the second vertical core body 51 constitute a rectangular core body together with the horizontal core body 49, and are respectively fixed to the four sides of the end face portions 42C and 42D.

  When the filling layer forming bag body 40 is inserted in the gap portion 15, the first vertical core body 50 tensions the outer peripheral surface portion 42F in the vertical direction, and the second vertical core body 51 connects the inner peripheral surface portion 42E. Tension in the vertical direction. This prevents wrinkles from occurring on the outer peripheral surface portion 42F, improves the adhesion between the outer peripheral surface portion 42F and the inner peripheral surface of the concave portion 11, prevents wrinkles from occurring on the inner peripheral surface portion 42E, and prevents the inner peripheral surface portion 42E. And the outer peripheral surface of the protrusion 13 can be improved.

  The bag body 42 is further between two end portions 48a and 48c located at the upper portion of the X-shaped core body 48 and between two end portions 48b and 48d located at the lower portion of the X-shaped core body 48, It has a semicircular arc core 46 in plan view. FIG. 6 is a perspective view showing only the X-shaped core body 48, the horizontal core body 49, the first vertical core body 50, the second vertical core body 51, and the arc-shaped core body 46. In order to make the configuration of the arc-shaped core body 46 easy to understand, the bag-shaped main body 42 is transmitted, and the X-shaped core body 48, the horizontal core body 49, the first vertical core body 50, the second vertical core body 51, and the arc-shaped core body. FIG. The arc-shaped core body 46 is made of a flexible resin, like the horizontal core body 49, the first vertical core body 50, and the second vertical core body 51, has a wire shape, and has an upper surface portion 42A and a lower bottom surface portion 42B. The bag body 42 is sewn and fixed along the outer peripheral edge.

  When the filling layer forming bag 40 is inserted in the gap portion 15, the arc-shaped core body 46 tensions the outer peripheral surface portion 42F in the circumferential direction. Thereby, it can prevent that wrinkles generate | occur | produce in the outer peripheral surface part 42F, and can further improve the adhesiveness of the outer peripheral surface part 42F and the inner peripheral surface of the recessed part 11. FIG.

  The X-shaped core body 48, the horizontal core body 49, the first vertical core body 50, the second vertical core body 51, and the arc-shaped core body 46 can be deformed into a shape along the shape of the bag body 42, and What is necessary is just to be comprised with the material which has mechanical strength which is not damaged at the time of conveyance of the bag body 40 for layer formation. In addition, the X-shaped core body 48, the horizontal core body 49, the first vertical core body 50, the second vertical core body 51, and the arc-shaped core body 46 are deformed when the bag body 42 is deformed due to external force applied during work or transportation. Even so, it is preferable to be made of a material having a spring force that can restore the shape of the bag body 42 when the external force is removed.

  Examples of the material of the X-shaped core body 48, the horizontal core body 49, the first vertical core body 50, the second vertical core body 51, and the arc-shaped core body 46 include polyurethane resin, polyester resin, polyethylene resin, nylon resin, and acrylic. Various synthetic resin materials such as resin and polycarbonate resin can be used.

  The filling layer forming bag 40 of the present invention is further provided with stitches S, X obtained by sewing edges of each surface portion of the bag body 42 when the filling material is filled in the sealed chamber 41 of the bag body 42. A part of the filler flows out from the seam S in which the core body 48, the first vertical core body 50, the second vertical core body 51, and the arc-shaped core body 46 are sewn to the bag body 42. The overflowing filler has hardened between the bag main body 42 and the recess 11 and the protrusion 13 and serves as an adhesive for bonding the bag main body 42 to the recess 11 and the protrusion 13. Here, the seam is a thread inserted through a through hole penetrating the nonwoven fabric in the thickness direction, and the filler flows out from a minute gap between the yarn and the nonwoven fabric.

  In the sewing to the outer peripheral surface portion 42F of the X-shaped core body 48, if at least the four end portions 48a, 48b; 48c, 48d and the central portion of the X-shaped core body 48 are sewn to the outer peripheral surface portion 42F, The outer peripheral surface portion 42 </ b> F can be brought into close contact with the inner peripheral surface of the recess 11. Considering that the seam is an outflow hole for allowing a part of the filler to flow out as an adhesive as described above, by sewing the entire X-shaped core body 48 to the outer peripheral surface portion 42F, the outer peripheral surface portion 42F Since many seams distributed more uniformly, that is, outflow portions of the filler are formed, a filler as an adhesive is placed between the outer peripheral surface portion 42F and the inner peripheral surface of the concave portion 11. It is preferable that it can be discharged in a sufficient amount.

  Since the X-shaped core body 48 is not provided on the inner peripheral surface portion 42E, there is a possibility that no seam is formed and the filler as the adhesive does not flow out sufficiently. Therefore, it is preferable to provide an outflow hole through which the filler can flow out in the inner peripheral surface portion 42E. As the outflow hole, the X-shaped core body 48 is not sewn, but an X-shaped seam may be formed on the inner peripheral surface portion 42E as well as the outer peripheral surface portion 42F. Further, it is possible to simply form a through hole in the nonwoven fabric without inserting the yarn. Such a through-hole is formed by, for example, using a sewing machine without using an upper thread and a lower thread, so-called blank stitching, and by using a sewing needle, the through-holes are continuously spaced at regular intervals in the same manner as the seam (the present invention). Then, it is easy to form a "perforation" on a nonwoven fabric. In addition, since the filler flows out through the gap between the through hole and the thread at the seam, if an appropriate amount can flow out by the seam, if the through hole is formed by the same sewing needle, the diameter is too large and excessively flows out. Therefore, in the case of a perforation, it is preferable to use a thinner perforation needle than a seam and to form a through hole having a diameter smaller than that of the seam.

  The filling material starts a curing reaction after the start of filling, and changes from a highly viscous liquid state to a gel state with the passage of time, and finally becomes a solid state. The outflow of the filler from the seam and perforation occurs in a liquid state, and in the gel state, the outflow stops.

  The perforation may be formed not only on the inner peripheral surface portion 42E but also on the outer peripheral surface portion 42F and other surface portions. The range of suitable diameters of seams and perforations, as well as the position and distribution to be formed vary depending on the composition of the filler used, such as the viscosity in the liquid state and the time required to change to a gel that stops outflow. What is necessary is just to determine beforehand by experiment. In addition, it is possible to use a nonwoven fabric in which the filler naturally oozes in an appropriate amount without forming a perforation, but it is complicated to find and select an appropriate nonwoven fabric from many types. In addition, since the pore diameter for the filler to ooze out from the nonwoven fabric varies and the pore distribution is not uniform, the same amount does not always ooze out even if a nonwoven fabric with the same basis weight is used. . Using a non-woven fabric, woven fabric, or sheet-like material with little or no seeping out of the filler, and forming the perforation by operating the sewing machine, the filler can be reproduced smoothly and appropriately. The effect can be surely achieved by easy work if the setting is made so that it flows well.

As a perforation, for example, a perforation having an opening diameter of 0.1 to 0.5 mm is made using a perforation needle having a count of 9 (needle diameter 0.67 mm) to 16 (needle diameter 1.02 mm). Form. The interval at which the through holes are formed is, for example, 2 to 5 mm, and the positions where the through holes are formed are considered to be more through holes in the upper part of the inner peripheral surface portion 42E and the outer peripheral surface portion 42F in consideration of the flowing out of the filler material by its own weight. May be distributed, or may be uniformly distributed on the inner peripheral surface portion 42E and the outer peripheral surface portion 42F. In the case of uniform distribution, for example, the number of holes per unit area is 3 to 9 / cm ² .

  Of the two-layered nonwoven fabric 43A and nonwoven fabric 43B, the outer nonwoven fabric 43A that is in direct contact with the concave portion 11 and the protrusion 13 is preferably a so-called non-woven fabric with many fibers protruding on the surface. The recess 11 and the protrusion 13 are both made of concrete, and minute holes are widely distributed on the inner peripheral surface and the outer peripheral surface. The outflow filler is stored in the hole, and the tip portion of the fiber protruding from the surface of the nonwoven fabric 43A is embedded in the filler stored in the hole, so that the bag body 42, the recess 11 and the protrusion 13 are formed. Further, the adhesive strength due to the filler is further improved.

  A sponge insertion portion 52 made of a nonwoven fabric is sewn to the lower portion of the bag body 42. The sponge insertion portion 52 has a cylindrical shape with both ends open in a substantially semicircular lateral direction in plan view. A square rod-shaped sponge member 53 having water permeability is inserted into the sponge insertion portion 52 over the entire length of the sponge insertion portion 52 from the end opening. The height of the sponge member 53 may be the same dimension (about 50 mm) as the thickness (height) of the filling layer 3.

  The total height of the filling layer forming bag body 40 is a total value of the height dimension of the bag main body 42 and the height dimension of the sponge insertion portion 52, and is substantially equal to the depth (height dimension) of the gap portion 15. Thereby, the bag main body 42, in other words, the sealed chamber 41, has substantially the same shape and the same size (volume) as the remaining space of the gap portion 15 excluding the volume of the sponge member 53 loaded in the sponge insertion portion 52. become.

  Next, the gap filling layer construction method using the filling layer forming bag 40 will be described with reference to FIGS.

  First, as shown in FIG. 7, the filling layer forming bag body 40 in which the sponge member 53 is inserted into the sponge insertion portion 52 is fitted into the gap portion 15.

  The filling layer forming bag body 40 maintains a sewing shape by the arc-shaped core body 46 and the X-shaped core body 48 sewed to the bag main body 42, and the filling layer forming bag body 40 is held at the gap 15. By simply inserting, the outer peripheral surface portion 42F of the bag main body 42 is in close contact with the inner peripheral surface of the recess 11 and the inner peripheral surface portion 42E of the bag main body 42 is in close contact with the outer peripheral surface of the protrusion 13. This eliminates the troublesome manual work of shaping and bonding the bag main body 42 so that the bag main body 42 is in close contact with the outer peripheral surface of the protrusion 13 and the inner peripheral surface of the recess 11. The work of evenly fitting into the 15 becomes reliable and easy.

  When the installation of the filling layer forming bag 40 is completed, as shown in FIG. 8, the filling material is filled in the sealed chamber 41 through the filling material filling port 45. Pressure filling is performed to fill the sealed chamber 41 with a filling gun (not shown). The bag main body 42 has a sealed structure to constitute the sealed chamber 41, and the filler is filled into the sealed chamber 41 through the filler filler filling port 45, whereby the filler is pressurized and filled without causing splashing. Is possible. By filling the filler in the sealed chamber 41 in this way, the inner peripheral surface portion 42E of the bag main body 42 is brought into close contact with the outer peripheral surface of the protrusion 13, and the outer peripheral surface portion 42F of the bag main body 42 is connected to the inner periphery of the recess 11. Adhere to the surface.

  Further, the filler in the sealed chamber 41 oozes out from the seams S or perforations formed in the inner peripheral surface portion 42E and the outer peripheral surface portion 42F of the bag body 42. By the oozing out filler, the inner peripheral surface portion 42E of the bag main body 42 is bonded to the outer peripheral surface of the protrusion 13, and the outer peripheral surface portion 42F of the bag main body 42 is bonded to the inner peripheral surface of the recess 11. Thereby, the bag main body 42 is firmly fixed to the protruding portion 13 and the slab plate 5, and the arrangement position of the filling layer forming bag body 40 in the gap portion 15 is stabilized. When the filling of the filler is completed, the filler filling port member 44 is deleted by cutting.

  When the hardening of the filler in the sealed chamber 41 is completed, the drainage passage portion 17 is formed at the bottom of the gap portion 15 by the sponge member 53 inserted into the sponge insertion portion 52 as shown in FIG. At the same time, the gap filling layer structure in which the gap filling layer 19 is present is completed by the filling layer forming bag 40.

  Here, an example of the filler will be described. As the filler, for example, by reacting by mixing A material containing a curing catalyst and the like containing a polyol containing an extender for increasing and adjusting the spring constant, and B material containing a curing agent by isocyanate, A polyurethane resin-based filler obtained by curing can be used. Curing time is controlled by the amount of the curing catalyst added, that is, the outflow amount of the filler flowing out from the through hole such as the seam or perforation can be controlled. In the above A material and B material, for example, when the mixing ratio of A material and B material is A material: B material = 4: 1, after mixing of A material and B material at 20 ° C. (before curing) The viscosity is 2.5 Pa · s, and the curing time from mixing at 20 ° C. to the end of curing is 20 minutes.

  Next, 2nd Embodiment of the bag body for filling layer formation of this invention is described with reference to FIG. 10, FIG. In the present embodiment, the cylindrical filler filling port member 60 made of a nonwoven fabric constituting the filler filling port 61 communicating with the sealed chamber 41 is not an upper surface portion 42A but an end surface portion 42C (first end surface portion) and The points described above are different except that they are respectively provided on the end surface part 42D (second end surface part), and have different fixed strings 62 each having one end fixed to both ends in the circumferential direction of the inner peripheral surface part 42E. Since it is the same structure as 1st Embodiment, the same referential mark is attached | subjected to the same site | part and description is abbreviate | omitted.

  The recess 11 and the protrusion 13 of the slab plate are preferably concentric, but are not necessarily concentric and may be provided in a shifted manner. In that case, the radial dimension of the gap 15 varies, and for example, it is narrow on one side in the circumferential direction and wide on the other side. When one filler filling port 45 is provided on the circumferential end portion side of the upper surface portion 42A as in the first embodiment, the gap portion 15 on the side where the filler filling port 45 is provided is provided. If it is narrow, the pressure loss in the vicinity of the entrance of the sealed chamber 41 becomes large. Therefore, it is necessary to increase the injection pressure for injecting the filler.

  If the side on which the filler filling port 45 is provided is wide and the gap 15 on the opposite side is narrow, the vicinity of the entrance of the sealed chamber 41 is easily filled even if the injection pressure is low, but the filling is not necessarily performed on the wide side. The material filling port 45 is not necessarily provided. Moreover, even if the filler filling port 45 is provided on the wide side, there is a possibility that the gap 15 is not sufficiently filled on the opposite side where the gap 15 is narrow. In this case, it is necessary to increase the injection pressure.

  In the present embodiment, the filler filling ports 61 are respectively provided in the end surface portion 42C and the end surface portion 42D. Thereby, for example, when the radial dimension of the gap 15 is not uniform and varies, the filler provided at the end face on the wide gap side of the two filler filling ports 61. The filling port 61 can be selected to fill the filler with a relatively low injection pressure. In addition, when the gap cannot be sufficiently filled on the narrow side, it can be filled by pouring from the filler filling port 61 provided on the narrow side.

  Furthermore, in this embodiment, when the two filling layer forming bags 40 are inserted into the gap 15 around the protrusions 13, the fixed string 62 provided in one filling layer forming bag 40. And the fixed string 62 provided on the other filling layer forming bag 40 are respectively bound on both sides in the circumferential direction. FIG. 11 is a schematic diagram showing a state in which the fixed string 62 is bound. In FIG. 11, the slab plate 5 is omitted so that the bound state is easy to understand, and only the protrusion 13 and the two packed bed forming bags 40 are illustrated.

  Specifically, one circumferential fixing string 62 provided on one filling layer forming bag 40 and the other circumferential fixing string 62 provided on the other filling layer forming bag 40. 62, and the fixing cord 62 on the other circumferential side provided on one filling layer forming bag body 40 and the fixing on one circumferential side provided on the other filling layer forming bag body 40. The string 62 is bound and bound at two locations on the outer periphery of the protrusion 13.

  Since the fixed string 62 is fixed to both end portions in the circumferential direction of the inner peripheral surface portion 42E, the two packing layer forming bag bodies 40 are bound by the fixed string 62 as described above, so that The peripheral surface portion 42 </ b> E can be more closely attached to the outer peripheral surface of the protruding portion 13.

  In the slab track, for example, in the curved portion of the track, the slab plate 5 or the like is not horizontal but has a cant portion inclined in the width direction. In the horizontal portion, as in the first embodiment, by having the X-shaped core body 48 and at least the horizontal core body 49, the outer peripheral surface portion 42F and the inner peripheral surface of the concave portion 11 are in close contact, and the inner peripheral surface portion 42E The outer peripheral surface of the protrusion 13 can be brought into close contact. However, in the cant portion, when the filler is injected, the injected filler flows into the lower side, and the filler is biased in the filler layer forming bag body 40. There exists a possibility that the bag 40 may move to the low side. In filling in such a cant part, by binding with the fixed string 62, the movement of the filling layer forming bag 40 at the time of filling the filling material can be prevented.

  The fixing string 62 is made of any material as long as it has a flexibility that allows an operator to easily tie it by hand and a strength that does not tear even when bound. However, synthetic resin materials such as polyester resin, nylon resin and vinyl chloride, natural fiber materials such as cotton and hemp, and mixtures thereof may be used. Moreover, the width | variety and length of the fixed string 62 are 1-3 cm, for example so that the width | variety of the fixed string 62 can be tied easily by an operator by hand, and length is 10-20 cm. is there.

  Next, a third embodiment of the filling layer forming bag of the present invention will be described with reference to FIGS. The present embodiment is the same as the second embodiment except that the check valve 70 is provided on the upper surface portion 42A of the bag body. A description thereof will be omitted. In the present embodiment, the two check valves 70 are provided at positions close to both ends of the upper surface portion 42A. However, the positions and the number of the check valves 70 are not particularly limited as long as they are provided on the upper surface portion 42A.

  FIG. 13 is a cross-sectional view showing the vicinity where the check valve 70 is provided. FIG. 13A shows a state where the valve is closed, and FIG. 13B shows a state where the valve is opened and the filler can flow out of the sealed chamber 41. The check valve 70 includes a casing 71 having an inlet 71a and an outlet 71b, a plate-like valve main body 72 that closes the inlet 71a when seated on a valve seat around the inlet 71a, and the center of the valve main body 72. And a compression coil spring 74 that applies a spring force that biases the valve rod 73 in a direction in which the valve rod 73 is inserted and seated on the valve seat.

  The check valve 70 is embedded in the upper surface portion 42A so that the inlet 71a of the casing 71 faces the sealed chamber 41 and the outlet 71b faces the external space. The compression coil spring 74 has one end abutting against the central portion of the casing 71 on the outlet 71b side as a spring receiver, and the other end abutting against one main surface opposite to the side on which the valve body 72 is seated. The other main surface of the valve main body 72 is seated on the valve seat of the inlet 71a of the casing 71 by force, and the inlet 71a is closed.

  When the filler is injected into the sealed chamber 41 from the filler filling port 61 of the bag body 42, the filler is sufficiently filled in the sealed chamber 41, and the filler is further injected, the sealed chamber 41 is filled. The filling material filled therein applies a force against the spring force to the valve body 72 from the inflow port 71a. When the force applied to the valve body 72 by the filler exceeds the spring force, that is, when the pressure in the sealed chamber 41 exceeds a predetermined pressure, the valve body 72 moves away from the valve seat, and the valve body 72 and the valve A gap is formed between the seat and the filler near the inlet 71a flows into the casing 71 from the inlet 71a. While the filling of the filler is continued, the amount of filler flowing into the casing 71 is increased, and after the inside of the casing 71 is filled with the filler, the filler is supplied from the outlet 71b to the external space. Leaks. Since the check valve 70 is provided on the upper surface portion 42A, the filler flowing out from the check valve 70 flows out to the surface of the upper surface portion 42A.

  The height positions of the upper surface of the slab plate 5 and the upper surface of the protrusion 13 may vary. When the height positions of the upper surface of the slab plate 5 and the upper surface of the protrusion 13 are lower than the surface of the upper surface portion 42A, the surface of the upper surface portion 42A and the slab plate 5 are reduced by reducing the amount of filler to be filled. It is possible to match the height of the upper surface with the upper surface of the protrusion 13. When the height position of the upper surface of the slab plate 5 and the upper surface of the protrusion 13 is higher than the surface of the upper surface portion 42A, the filler flows out from the check valve 70 provided on the upper surface portion 42A as described above. Let

  When the upper surface of the recess 11 and the upper surface of the protrusion 13 are higher than the surface of the upper surface 42A, the inner surface of the recess 11, the outer periphery of the protrusion 13 and the surface of the upper surface 42A are surrounded, and the upper part is opened. A space is formed. When the filler is continuously discharged from the check valve 70, the discharged filler covers the entire surface of the upper surface portion 42A and fills the space on the upper surface portion 42A. When the filler is sufficiently filled with the space on the upper surface portion 42A, the injection of the filler from the filler filling port 61 into the sealed chamber 41 is terminated. When the filling of the filler is completed and the filler is sufficiently cured, the filler filling port member 60 is cut off.

  By providing the check valve 70 on the upper surface portion 42A in this way, the surface of the upper surface portion 42A is covered with the filler, and the surface of the filler material is aligned with the upper surface of the slab plate 5 and the upper surface of the protrusion 13. it can.

  Furthermore, in the cant portion, it is preferable to inject the filler into the filling layer forming bag body 40 using a lid-shaped jig 80 that covers the surface of the protruding portion 13 and the annular gap portion. FIG. 14 is a schematic diagram showing a state in which the lid-shaped jig 80 is arranged. When the filler is injected into the filling layer forming bag 40 in the cant portion, the liquid level in the sealed chamber 41 tends to be kept horizontal, so that the lower side is filled with a large amount of filler. And unevenness of the filler occurs.

  Even if the injection is continued, it is difficult for the high side to be filled with the filler in the entire sealed chamber 41 while a space is left above the sealed chamber 41. The lid-shaped jig 80 can easily fill the filler in the space on the high side by suppressing the filler that tends to be biased to the low side from above.

  As another embodiment of the present invention, a tube 90, which is a hollow tubular member made of a foam material, is provided for drainage instead of the sponge member 53 described above. FIG. 15 is a cross-sectional view of the tube 90 disposed therein. The tube 90 is provided below the lower bottom surface portion 42B. The diameter of the tube 90 is the same dimension (about 50 mm) as the thickness of the packed bed 3.

  The total height of the filling layer forming bag body 40 is a total value of the height dimension of the bag body 42 and the height dimension of the tube 90, and is substantially equal to the depth (height dimension) of the gap 15. Thereby, the bag main body 42, in other words, the sealed chamber 41 has substantially the same shape and the same size (volume) as the remaining space of the gap portion 15 excluding the tube 90.

  The foam material constituting the tube 90 may be a foam material having a continuous air hole communicating with the outside and having a strength capable of supporting the bag body 42 filled with the filler. As the foam material, for example, foamed urethane resin, foamed polyethylene resin, foamed silicon resin, or the like can be used.

  Next, the gap filling method when the tube 90 is used will be described. First, the tube 90 is disposed at the bottom of the gap 15. The filling layer forming bag body 40 simply inserts the filling layer forming bag body 40 at the gap 15 so that the outer peripheral surface portion 42F of the bag main body 42 is in close contact with the inner peripheral surface of the recess 11 and The inner peripheral surface portion 42E is in close contact with the outer peripheral surface of the protruding portion 13.

  When the installation of the filling layer forming bag 40 is completed, the filling material is filled in the sealed chamber 41 through the filling material filling port. By filling the filler in the sealed chamber 41, the inner peripheral surface portion 42 </ b> E of the bag main body 42 is in close contact with the outer peripheral surface of the protrusion 13, and the outer peripheral surface portion 42 </ b> F of the bag main body 42 is in close contact with the inner peripheral surface of the recess 11. .

  Further, the filler in the sealed chamber 41 oozes out from the seams S or perforations formed in the inner peripheral surface portion 42E and the outer peripheral surface portion 42F of the bag body 42. By the oozing out filler, the inner peripheral surface portion 42E of the bag main body 42 is bonded to the outer peripheral surface of the protrusion 13, and the outer peripheral surface portion 42F of the bag main body 42 is bonded to the inner peripheral surface of the recess 11. Thereby, the bag main body 42 is firmly fixed to the protruding portion 13 and the slab plate 5, and the arrangement position of the filling layer forming bag body 40 in the gap portion 15 is stabilized. At this time, the filler that has flowed out from below enters the communication bubbles of the tube 90, and the filler main body and the tube 90 are firmly fixed as an adhesive. When the filling of the filler is completed, the filler filling port member 44 is deleted by cutting.

  When the hardening of the filler in the sealed chamber 41 is completed, the drainage passage portion 17 is formed at the bottom of the gap portion 15 by the tube 90, and the gap filling layer is formed by the filling layer forming bag body 40 at the upper portion thereof. The gap filling layer structure 19 is completed.

  As described above, fixing the bag body 42 and the tube 90 uses a part of the filler that has flowed out of the sealed chamber 41, so that the filler can easily flow out below the bag body 42. It is preferable to form a seam S or a perforation on the lower bottom surface portion 42B.

  The preferred embodiments of the present invention have been described above. However, as can be easily understood by those skilled in the art, the present invention is not limited to such embodiments and does not depart from the spirit of the present invention. It can be changed as appropriate.

  The material of the bag body 42 is not limited to a nonwoven fabric, and may be a resin film or a laminate of a nonwoven fabric and a resin film. The X-shaped core body 48, the horizontal core body 49, the first vertical core body 50, and the second vertical core body 51 are not limited to resin, and may be formed of an elastic material or the like.

  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 3 Filling layer 5 Slab board 7 Fastener 9 Rail 11 Recessed part 13 Protruding part 15 Gap part 17 Drainage passage part 19 Filling layer for gap 40 Bag body for filling layer formation 41 Sealing chamber 42 Bag main body 42A Upper surface part 42B Lower bottom surface portion 42C, 42D End surface portion 42E Inner peripheral surface portion 42F Outer peripheral surface portion 43A, 43B Nonwoven fabric 44 Filler filling port member 45 Filler filling port 46 Arc-shaped core body 48 X-shaped core body 48a End portion 48b End portion 48e Central portion 49 Horizontal core 49A Horizontal core 50 First vertical core 51 Second vertical core 52 Sponge insertion portion 53 Sponge member 60 Filling material filling port member 61 Filling material filling port 62 Fixed string 70 Check valve 71 Casing 71a Inflow port 71b Outlet port 72 Valve body 73 Valve rod 80 Lid jig 90 Tube

Claims (9)

Positioning recesses formed at both ends in the longitudinal direction of the slab plate in a slab type track in which a slab plate is installed on a packed bed formed on the roadbed concrete and a rail is fastened on the slab plate And a filling layer forming bag body used to provide a gap filling layer in a gap between the positioning protrusions formed on the roadbed concrete,
A bag body having a sealed structure formed of a nonwoven fabric having a filler filling port that is formed so as to constitute a sealed chamber having substantially the same shape as the space of the gap portion, and that communicates with the sealed chamber. A bag body having an outer peripheral surface portion that contacts the inner peripheral surface and an inner peripheral surface portion that contacts the outer peripheral surface of the positioning projection;
An X-shaped core body formed by crossing two belt-shaped members at the respective centers to form an X shape provided along the outer peripheral surface portion;
And a protruding core that is connected to both longitudinal ends of one strip member and both longitudinal ends of the other strip member and projects toward the inner peripheral surface portion. Forming bag.   The protruding core body is a horizontal core body that linearly extends from both longitudinal end portions of the one strip-shaped member and both longitudinal end portions of the other strip-shaped member toward the inner peripheral surface portion. The filling layer forming bag according to claim 1. One longitudinal end of one belt-like member and the longitudinal end of the other belt-like member arranged in the vertical direction when arranged in the gap, and the longitudinal direction of one belt-like member A first vertical core provided in a straight line between the other end portion and the other end portion in the longitudinal direction of the other band-shaped member, which is arranged in the vertical direction when arranged in the gap portion. When,
3. A second vertical core provided in a straight line between the ends on the inner peripheral surface side of the two horizontal cores arranged in the vertical direction when disposed in the gap portion. The bag for forming a packed bed according to the description. The bag body is
A first end surface portion provided between one end portion in the circumferential direction of the outer peripheral surface portion and one end portion in the circumferential direction of the inner peripheral surface portion;
A second end surface portion provided between the other circumferential end of the outer peripheral surface portion and the other circumferential end of the inner peripheral surface portion;
An upper surface provided between an end located on the upper side of the outer peripheral surface and an end located on the upper side of the inner peripheral surface when disposed in the gap;
A lower bottom surface portion provided between an end portion located on the lower side of the outer peripheral surface portion and an end portion located on the lower side of the inner peripheral surface portion when disposed in the gap portion;
The filler filling layer forming bag according to any one of claims 1 to 3, wherein at least one filler filling port is provided at each of both circumferential ends.   5. The filling layer forming bag according to claim 4, wherein the filler filling port is provided in each of the first end surface portion and the second end surface portion.   When the pressure inside the sealed chamber exceeds a predetermined pressure when the filler is filled in the bag body, the filler is allowed to flow from the sealed chamber to the external space. The packed bed forming bag body according to claim 5, further comprising a check valve that prevents inflow from the external space into the sealed chamber regardless of the pressure in the sealed chamber.   The bag body for filling layer according to any one of claims 4 to 6, wherein the bag body has a hollow tubular member made of a foam material provided below the lower bottom surface portion. .   The said bag main body has the fixed string by which the one end was fixed to the circumferential direction both ends of the said internal peripheral surface part, respectively, For the packed bed formation as described in any one of Claims 1-7 characterized by the above-mentioned. Bag body.   The through-hole from which the filler filled in the said bag main body can flow out is provided in at least any one of the said outer peripheral surface part and the said internal peripheral surface part, The any one of Claims 1-8 characterized by the above-mentioned. A filling layer forming bag described in 1.

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