JP6179056B2 - Pavement plate connection structure - Google Patents

Description

  The present invention relates to a pavement plate connection structure when a precast concrete pavement plate or a cast-in-place concrete pavement plate is laid on a roadbed to form a pavement surface such as a road, a port facility, an airport apron, or a runway.

  Conventionally, precast and prestressed concrete paving slabs have been widely used because roads, airport apron, runways, etc. have excellent durability and can be repaired or replaced for settlement, damage, etc. ing. Since the size of these pavement plates is limited in manufacturing and construction, a plurality of pavement plates are connected to form a pavement surface having a predetermined length and area.

  As such a pavement plate connection structure, each pavement plate is formed with a plurality of arc-shaped connection holes with both ends opened at the joint surface and the upper surface at predetermined intervals, and the joint surfaces of the pavement plates on both sides are brought into contact with each other. The connecting holes of both are aligned and communicated, and a connecting rod such as an arcuate steel material is inserted across the connecting hole, and further, grout such as mortar is filled and solidified to embed the connecting rod. A method of fixing and connecting pavement plates on both sides to each other is known (for example, Patent Documents 1 and 2).

  This pavement plate connection structure allows the work to be performed efficiently because operations such as insertion of the connecting rod into the connection hole and filling of the grout can be performed from the upper surface of the pavement plate. However, with the lapse of time after construction, the connection between the connecting rod and the grout in the connecting hole is cut off, and the grout is cracked due to vibration, displacement, etc. of the connecting rod, and this progresses, and the end of the grout is paved from the connecting hole. There is a problem that the protruding portion is worn and damaged by a traveling vehicle or the like and a concave portion is formed on the upper surface.

  As a solution to this problem, a cushioning material was installed at the end of the steel material embedded in the connecting hole, preventing the destruction of grout due to the movement of the steel material when the load fluctuated on the pavement plate surface. The thing is developed (patent document 3).

JP 56-167005 A JP 56-167006 A Japanese Patent Laid-Open No. 10-252008

  This structure uses an arc-shaped connecting hole and an arc-shaped connecting rod embedded in the inside thereof as shown in the above cited reference 3, and prevents the grout from being broken and scattered. However, it is possible to completely prevent damage to the grout due to movement of the connecting rod due to repeated deflection of the connecting part due to repeated load applied by the wheel passing through the paving plate and the influence of temperature change. There wasn't.

  In view of such a conventional problem, the present invention can be constructed easily and at low cost by a small number of on-site work as well as the conventional connection structure using the arc-shaped connection hole and the arc-shaped steel material described above. The present invention has been made for the purpose of providing a pavement plate connection structure that can prevent grout scraps from being scattered on the pavement plate even under the influence of repeated bending of the connection portion due to repeated loading and temperature changes.

  The feature of the invention described in claim 1 for solving the conventional problem as described above is that each pavement plate connected to each other is provided with an upward arc-shaped connection hole that opens to communicate with the upper surface and the joint surface of the pavement plate. The joint holes of the connecting holes are communicated with each other to join the both paving plates, and the connecting holes in communication with each other are connected to the connecting holes, and an upward arc-shaped connecting rod is inserted through the central portion of the connecting holes. In the pavement plate connection structure in which the rod is embedded in the both connection holes by grout, the concave portion having a shape in which the surfaces are recessed at a predetermined distance from each joint surface of the surfaces of the both pavement plates The rising surface on the opposite side to the joint surface in the recessed portion is formed at right angles to the upper surface of the paving plate, and the connection hole is formed on the joint surface and the rising surface on the joint surface side in the recessed portion. The connecting rod is formed with a communication opening. A screw is engraved on the outer periphery of the portion, a nut is screwed into the recess in the recessed portion, a removable post-filling material is fitted into the recessed portion, the post-filling material and the end surface of the nut on the recessed portion side The post-filling material is detachably fixed to the pavement plate with an elastic cushion material interposed therebetween.

  According to a second aspect of the present invention, in addition to the structure of the first aspect, the post-filling material is exposed to the bottom surface of the concave portion and is embedded in the pavement plate with respect to the anchor nut. It exists in being fixed in the recessed part by screwing and fastening the penetrated volt | bolt.

  The feature of the invention described in claim 3 is that, in addition to the structure of claim 1 or 2, the post-filling material is formed with high-strength fiber reinforced mortar.

  According to a fourth aspect of the present invention, in addition to the structure according to any one of the first to third aspects, the connecting rod is provided on the outer periphery of a portion excluding the nut fitting portions at both ends thereof, from one end side to the other end side. An arc-shaped covering material embedded in the central portion of the tape-shaped covering material, and provided with an edge cutting material layer for preventing the covering material and the grout from adhering to the outer periphery of the covering material; The grout is filled in between.

  In the present invention, as described in claim 1, each pavement plate connected to each other includes an upward arc-shaped connection hole that opens to communicate with the upper surface and the bonding surface of the pavement plate, and the bonding surface of the connection hole The side openings are communicated with each other to join the two paving plates, and the connecting holes arranged in communication with each other are connected to each other so that an upward arc-shaped connecting rod is inserted into the central portion thereof, and the connecting rods are inserted into the connecting holes. Because it is a structure embedded in the grout, it is possible to connect the paving slabs only from the surface side of the paving slabs as before, and for repair by removing the arc-shaped connecting rods. A part of the pavement plate is removed, and a new pavement plate can be easily installed.

  In addition, a concave portion having a shape in which the surface is recessed is provided at a position spaced apart from each joint surface of the surfaces of the both paving plates, and a rising surface opposite to the joint surface in the concave portion is provided. The pavement plate is formed at a right angle to the upper surface of the pavement plate, and the connection hole is formed to open to the connection surface and the rising surface on the connection surface side in the recessed portion. The nut is screwed into the recess in the recess, and a removable post-filling material is fitted into the recess, and the post-filling material and the end surface of the nut on the recess side are elastic. With the cushioning material interposed, the backfill material is detachably fixed to the pavement plate, so that the vertical deflection is caused by the wheel load applied when the vehicle or aircraft moves on the connected pavement plate. Even if the is repeated, both ends of the connecting rod Because it is supported by the rear fill material through the nut and the elastic cushion material, axial movement is restricted, generation of deposition out of the connecting rod and grout is suppressed.

In addition, even if the pavement plate and the grout are cut off due to repeated loads on the pavement plate connecting portion and the connecting rod is slightly moved in the axial direction, the shaft is attached to the backfilling material via the nut and the cushioning material. Since the load in the direction is transmitted, the load transmission area is much larger than the cross-sectional area of the connecting rod, the load per unit area is small, and the post-filling material can be prevented from being destroyed.
Further, since the axial load of the connecting rod acts substantially perpendicularly to the rising surface opposite to the joint surface in the recessed portion formed at a right angle to the upper surface of the pavement plate via the backfill material, The material is difficult to protrude on the surface of the pavement plate.

  According to the present invention, as described in claim 2, the post-filling material is screwed with a bolt penetrating the post-filling material to an anchor nut exposed on the bottom surface of the recessed portion and embedded in the paving plate. By fixing in the recessed portion by fitting and fastening, the area for tightening the paving plate surface of the post-filling material becomes a small area limited to the opening of the recessed portion. For this reason, it is possible to prevent the post-filling material from projecting to the surface of the paving plate.

  In the present invention, by forming the post-filling material with high-strength fiber reinforced mortar as described in claim 3, the amount of thermal deformation becomes equal to that of the pavement plate itself, and the gap between the post-fill material and the pavement plate due to temperature change is reduced. There is no fluctuation.

  According to the present invention, the central portion of the arc-shaped covering material having a taper shape from one end side to the other end side on the outer periphery of the portion excluding the nut fitting portions at both ends thereof. The outer periphery of the covering material is provided with an edge cutting material layer for preventing the covering material and the grout from adhering, and the grout is filled between the edge cutting material and the inner surface of the connection hole. When replacing the paving slab for repair, etc., with the nut removed, press the connecting rod from the narrow diameter side of the taper with a hammer, etc. The connecting rod can be extracted to the surface side of the paving plate through the recessed portion.

It is a longitudinal cross-sectional view of the whole structure of an example of implementation of the connection structure of the pavement plate which concerns on this invention. It is a top view same as the above It is the sectional view on the AA line in FIG. It is sectional drawing which shows the connection hole part of the pavement plate before connection. The back filling material is shown, (a) is a front view, (b) is a plan view, and (c) is a right side view. It is a disassembled perspective view of the member which fixes a backfill material to the recessed part of the pavement plate surface. FIG. 2 is an exploded perspective view of a connecting rod fastening member in the connecting structure shown in FIG.

  Next, embodiments of the present invention will be described with reference to the drawings.

  In the figure, reference numeral 1 denotes a pavement plate connected by a pavement plate connection structure according to the present invention. The pavement plate 1 uses a precast concrete plate as an example, but may be a concrete plate by cast-in-place.

  Each of the pavement plates 1 and 1 connected to each other has an upward arc-shaped connection hole 3 that opens to communicate with the upper surface of the pavement plate 1 and the bonding surface 1a. The pavement plates 1 and 1 are connected to each other so as to be joined to each other, and an upward arc-shaped connecting rod 10 is inserted into the central portion of the connecting holes 3 and 3, and the connecting rod 10 and the connecting hole 3. , 3 is filled with a grout 16 in the gap between the inner surfaces, so that the connecting rod 10 is embedded in an arrangement straddling both paving plates 1, 1.

On the upper surface of the edge portion on the joint surface 1a side of the both paving slabs 1 and 1 that are connected to each other, a recess formed by boxing using a boxing mold at a predetermined distance from the edge portion. 2 are formed at predetermined intervals in the arrangement along the edge, and the rising surface 2a and the bonding surface on the bonding surface 1a side, that is, the front side, in each recessed portion 2 are formed. A connecting hole 3 is formed so as to communicate with 1a.
Further, the joint surface 1a side, that is, the rear-side rising surface 2b in each recessed portion 2 is perpendicular to the upper surface 1b of the respective paving plates 1 and 1, that is, when the paving plate is in a horizontal arrangement, it is oriented in the vertical direction. Is formed.

  The connecting hole 3 is formed at a position where the two paving plates 1 and 1 communicate with each other when the two paving plates 1 and 1 are joined to each other. In addition, between the joint surfaces of the pavement plates 1 and 1, an elastic joint material 4 having an opening formed in the connecting hole 3 is interposed, and a communicating hole portion 4a formed in the joint material. The connecting holes 3 and 3 of the both pavement plates 1 and 1 are communicated with each other.

  Each connecting hole 3 is formed by embedding an arcuate steel pipe 5 in the pavement plate 1. On the outer periphery of the end of the steel pipe 5 on the recessed portion 2 side, a flange plate 6 is integrated in a flange-like arrangement.

  This saddle plate 6 is formed on the inner surface of the concave portion 2 on the joint surface side and is exposed on the bottom surface of the concave portion 7 in which a connecting rod fixing nut 12 described later fits rotatably, and the concave portion side opening 3b of the connecting hole 3 is formed. An opening is formed in the recess 7.

  The steel pipes 5 and 5 in the both pavement plates 1 and 1 are formed in an arc shape having the same curvature, and an extension of the arc is recessed as shown by a steel pipe center line a shown by a temporary line in FIG. The curvature of the shape which passes the opening part of the pavement plate surface side of the part 2 is obtained.

  One connecting rod 10 is inserted in a continuous arrangement in the connecting holes 3 and 3 of the both pavement plates 1 and 1 to be connected to each other. The connecting rod 10 is formed with the same curvature as the center line a of the steel pipes 5 and 5, and is inserted at the position of the center line a.

  Threads 11 and 11 are formed on the outer circumferences of both ends of the connecting rod 10, and connecting rod fixing nuts 12 and 12 are screwed into the screw threads 11 and 11, respectively. Ring-shaped elastic cushion members 13, 13 are interposed.

  The connecting rod 10 is embedded in the outer periphery of the portion excluding the nut fitting portions at both ends thereof in the central portion of the arc-shaped covering material 14 that is tapered from one end side to the other end side. Is provided with an edge cutting material layer 15 for preventing the grout 16 and the coating material 14 to be described later from adhering to each other.

  As an example of the covering material 14, mortar can be used, and a cement-type grout material can be used. Moreover, as the edge cutting material layer 15, a bitumen or a synthetic resin film can be used. When bitumen is used, the covering material 14 is formed in advance in an arcuate taper shape and then applied to the outer peripheral surface thereof.

  On the other hand, when using a synthetic resin film, a tape-shaped one may be wound around the outer periphery of the covering material 15 formed in advance, and an arc-shaped tapered cylinder is previously formed using the synthetic resin film, The connecting rod 10 may be inserted therein, and the covering material 14 may be filled between the connecting rod 10 and the tapered cylindrical film.

  The connecting rod 10 with the covering material 15 formed in this way is inserted into the connecting holes 3 and 3, and the nuts 12, The connecting rod 10 is positioned by screwing 12 and tightening the nuts 12 and 12.

  In addition, in a state after the nuts 12 and 12 are tightened, both ends of the connecting rod 10 are formed in advance so as not to protrude from the inner surfaces of the recessed portions 2 of the paving plates 1 and 1.

  The grout 16 is filled in the gap between the connecting rod 10 with the covering 15 positioned in the connecting holes 3 and 3 and the inner surface of the connecting hole. As an example, the grout 16 is made of non-shrinkable cement milk. The grout 16 is filled with one of the grout holes 17 and 17 connected to the upper end of the recessed portion 2 side of each steel pipe 5 and the other grout press-fitting hole. Grout 16 is injected as an air vent hole, and the inside gap is filled without any gaps.

  After the grout 16 is filled in this way and a predetermined strength is developed, the above-described nuts 12 and 12 are fastened to the saddle plate 6 side, thereby connecting the paving plates 1 and 1 so as not to be relatively movable. The nuts 12 and 12 may be fastened before grout filling.

  In addition, in a state after the nuts 12 and 12 are tightened, both ends of the connecting rod 10 are formed in advance so as not to protrude from the inner surfaces of the recessed portions 2 of the paving plates 1 and 1.

  A backfill material 20 is fitted into the recessed portion 2. After this, the filling material 20 is formed so that it fits into the recessed portion 2 and the upper surface is the same height as the surface of the pavement plate 1. The post-filling material 20 is formed with high-strength fiber reinforced mortar. As an example, DAX mortar (PS Mitsubishi trademark) mixed with steel or organic short fiber reinforcing material can be used.

  The post-filling material 20 is provided with a bolt stopper 21 that is embedded through the front and back surfaces. The bolt stopper 21 is formed such that the upper end side is thicker than the lower end side, and a bolt insertion hole 22 is opened through the center. The bolt insertion hole 22 has a bolt head fitting portion 22a having an enlarged diameter on the upper side and a bolt shaft portion through portion 22b on the lower side.

  When the backfill material 20 is fitted in the bottom surface of the recessed portion 2, the anchor nut 23 exposes the opening at a position corresponding to the bolt shaft through portion 22 b of the bolt insertion hole 22. Embedded in the state. The anchor nut 23 and the bolt stopper 21 are made of ceramic or high strength mortar.

  The backfilling material 20 in the recessed portion 2 inserts the head-attached bolt 24 into the bolt insertion hole 22 of the bolt stopper 21 described above, and the shaft portion 24 b is inserted into the bolt shaft portion through portion 22 b of the bolt stopper 21. Insert, screw the tip into the anchor nut 23, and tighten the head 24a in contact with the stepped portion at the boundary between the bolt head fitting portion 22a and the bolt shaft through portion 22b in the bolt insertion hole 22. It is fixed so that it cannot be removed.

  In addition, the bolt 24 with a head uses the thing by which a square hole is formed in the top surface and can be attached or detached with a square rod wrench.

  The opening at the upper end of the bolt stopper 21 is closed by a lid 25. By fitting the lid 25, the hole on the upper surface of the post-filling material 20 is closed and the surface becomes flat. It has become.

  The pavement plate connecting structure configured as described above forms the recessed portion 2 by boxing at the time of manufacturing the cast-in-place or precast concrete pavement plate 1, and forms the connection hole 3 by embedding the steel pipe 5. . As shown in the figure, the pavement plates 1 and 1 are joined with a joint material 4 interposed between the joint surfaces 1a and 1a and the connecting holes 3 and 3 aligned with each other.

  Next, the connecting rod 10 is inserted into the connecting holes 3 and 3 that are in communication with each other, the ring-shaped elastic cushion material 13 is applied to the flange plate 6 of each steel pipe 5, and the nuts 12 are fitted to both ends of the connecting rod 10, After the side nut 12 is screwed to a predetermined position, the multi-end nut 12 is tightened. As a result, the connecting rod 10 is fixed in a state of being straddled between the paving plates 1 and 1.

  After fixing the connecting rod 10 in the connecting holes 3 and 3 in this way, the gaps in the connecting holes 3 and 3 are filled with the grout 16, and the disk-like elastic cushion material 18 is formed on the outer surfaces of the nuts 12 and 12. The disc-shaped elastic cushion material 13 is compressed between the end faces of the nuts 12 and 12 and the back-filling material 20 by fitting the back-filling material 20 into the recessed portion 2 and fixing with the bolts with heads 24. Intervene in the state. Next, the lid 25 is fitted and the connection operation is completed.

  In the pavement plate connection structure configured as described above, even if the upper and lower deflections are repeated by the wheel load applied when the vehicle or aircraft moves on the connected pavement plates 1 and 1, Since both ends are supported by the post-filling material 20 via the nut 12 and the disk-shaped elastic cushion material 18, the movement in the axial direction is restricted, and the occurrence of breakage of the connection between the connecting rod 10 and the grout 16 is suppressed.

  In addition, even if the connecting rod 10 and the grout 16 are cut off due to repeated loads and are slightly moved in the axial direction, the axial direction is applied to the backfill 20 via the nut 12 and the disk-shaped elastic cushion material 18. Therefore, the load transmission area is much larger than the cross-sectional area of the connecting rod 10, the load per unit area is small, and the post-filling material 20 can be prevented from being destroyed. Further, since the axial load of the connecting rod acts substantially perpendicularly on the rising surface 2b on the rear side in the recessed portion formed at right angles to the upper surface 1b of the pavement plates 1 and 1 through the backfill material, The material is difficult to protrude on the surface of the pavement plate.

  After the pavement plates are connected and laid in this way, when replacing some of the pavement plates, the backfill materials 20 and 20 on both ends of the connection rod 10 are removed, and the nut 12 at one end of the connection rod 10 is removed. The connecting rod 10 is removed from the other recessed portion 2 by smashing the exposed end portion of the covering member 15 on the narrow diameter side with a hammer or the like. At this time, since the edge cutting material layer 15 exists between the outer covering material 15 and the grout 16 of the connecting rod 10, the connecting rod 10 is easily extracted together with the covering material 15 to the large diameter end portion side.

  In this way, after breaking the connection between the pavement plate 1 to be replaced and the adjacent pavement plate 1, the pavement plate 1 to be replaced is removed, and the remaining connecting rod 10 of the pavement plate 1 is extracted. Strip the grout 16 adhering to the inside of the steel pipe 5 to finish the inner surface cleanly, insert a new paving plate 1 into the space after the paving plate has been extracted, and make a gap between adjacent paving plates in the same manner as described above. Link.

  In addition, as described above, if the connecting rod 10 is not cut out without being cut, and the connecting rod 10 cannot be removed without being cut for some reason, the connecting rod 10 is jointed between the paving plates. After removing the pavement plate to be replaced by cutting at the portion, the connecting rod 15 may be removed by extruding the connecting rod 10 to the large diameter side of the taper.

a steel pipe center line 1 pavement plate 1a joint surface 1b upper surface 2 recessed portion 2a front side rising surface 2b rear side rising surface 3 connecting hole 3a joint surface side opening 3b concave portion side opening 4 joint material 4a communicating hole portion 5 steel pipe 6鍔 plate 7 recess 10 connecting rod 11 thread 12 connecting rod fixing nut 13 ring-shaped elastic cushion material 14 covering material 15 edge cutting material layer 16 grout 17 grout hole 18 disc-shaped elastic cushioning material 20 backfill material 21 bolt stopper 22 bolt Insertion hole 22a Bolt head fitting part 22b Bolt shaft part through part 23 Anchor nut 24 Bolt with head 24a Head 24b Shaft part 25 Lid

Claims (4)

Each pavement plate connected to each other is provided with an upward arc-shaped connection hole communicating with the upper surface and the joint surface of the pavement plate, and the joint surface side openings of the connection holes are communicated with each other to join the two pavement plates. In the connection structure of the paving slab, the arc-shaped connecting rod is inserted into the central portion of the connecting holes in communication with each other, and the connecting rod is embedded in the connecting holes by grout.
A recessed portion having a shape in which the surface is recessed is provided at a position spaced apart from each joint surface of the surfaces of the both pavement plates, and the rising surface opposite to the joint surface in the recess is provided on the pavement. Forming at right angles to the upper surface of the plate, and forming the connection hole in communication with the joint surface and the rising surface on the joint surface side in the recess,
Screws are engraved on the outer periphery of both ends of the connecting rod, and a nut is screwed into the recess in the recess, and a removable post-filling material is fitted in the recess, and the post-filling material and the A pavement plate connection structure, wherein the backfill material is detachably fixed to the pavement plate in a state where an elastic cushion material is interposed between the end surface of the nut and the recessed portion.   The post-filling material is fixed in the concave portion by screwing and fastening a bolt that penetrates the post-filling material to an anchor nut that is exposed on the bottom surface of the concave portion and is embedded in the pavement plate. The pavement plate connection structure according to claim 1.   The pavement plate connection structure according to claim 1, wherein the post-filling material is formed with high-strength fiber-reinforced mortar.   The connecting rod is embedded in the outer periphery of the portion excluding the nut fitting portion at both ends thereof, embedded in the center portion of the arc-shaped covering material tapered from one end side to the other end side, The connection of the paving plate according to any one of claims 1 to 3, further comprising an edge cutting material layer for preventing the covering material and the grout from adhering, and filling the grout between the edge cutting material and the inner surface of the connection hole. Construction.

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