JP4402148B2 - Telescopic joint device for concrete paving plate - Google Patents

Description

  The present invention relates to an expansion joint device for a concrete paving plate. More particularly, the present invention relates to a concrete pavement expansion and contraction joint device for installation in a play between prestressed concrete pavement plates laid mainly on an airport moving path, an apron or the like.

  Prestressed concrete paving slabs used at airports, that is, prestressed concrete paving slabs pre-stressed by PC steel, etc., allow for installation errors, uneven ground subsidence, In order to absorb the temperature change, a gap is provided between the paving plates, and the gap changes. For this reason, a joint device is installed for allowing such a space to expand and contract and to seal the space opening. Further, conventionally, a method of filling asphalt joint material between the paving plates has been employed. A variety of recent joint devices have been proposed and developed. A typical example of the joint device is a rubber material that elastically expands and contracts.

  This seals the upper surface, and provides a hollow portion in the middle of the cross section to cope with the stretching action. For example, it is a walking deck connecting device for a platform of a station, but a base provided on the outside with an elastic joint material provided with a portion that matches the walking surface in the center in the width direction and a support portion that supports in the bottom direction There is known one that is configured to be detachable by being locked to a locking shape member of a body (see, for example, Patent Document 1).

  Further, although it is a rubber gasket as an expansion joint having a hollow section, this gasket is interposed between opposing prestressed concrete pavement plates in a compressed state, and ridges integrally formed on both sides of the gasket, A stretch joint of a prestressed concrete paving plate that is fitted into a concave groove of a gasket holding metal and is prevented from coming off is known (see, for example, Patent Document 2).

  Furthermore, as an expansion joint for the airport, each end face of the facing prestressed concrete pavement plate is provided with a holding member having a convex section in the upper surface direction, and a fixed section for sandwiching the convex section at both ends is provided. An expandable joint with a configuration in which a joint material is interposed is known (for example, see Patent Document 3).

All of the known conventional expansion joints are detachable.
JP 07-268805 A Japanese Utility Model Publication No. 05-16808 JP 2004-308179 A

  As the conventional expansion joint, a detachable type is known as in Patent Document 1 described above. Since this detachable type is easy to detach at the time of replacement work, it has a certain effect in terms of improving workability. However, with this configuration, the elastic joint material is not a physically fixed configuration, so if an unexpected pressing force is generated from below the concrete pavement plate, it may come off from the fixed concrete pavement plate. Occurs.

  For example, when there is a gap under the concrete paving plate and water etc. is retained, when an aircraft or vehicle travels on the upper surface, the concrete paving plate partially sinks due to its mass pressure, and water etc. It becomes water and gushes to the upper surface side. Along with this eruption, foreign matter such as pebbles and sand is also blown up, and the elastic joint material fitted into the convex portion of the concrete pavement plate is blown off by pressing. In such a situation, in the worst case, these foreign matters may be sucked into the jet engine or the like.

  In particular, joint equipment for airports has a direct impact on passenger safety.If the joint equipment is removed and the concrete paving slab is left open, it may be large when an aircraft or the like travels. It cannot be said that there is no fear of being directly connected to the accident. This must be avoided. Moreover, the concrete pavement slabs used in airport aprons often use large prestressed concrete slabs that are long, and these large prestressed concrete slabs are subject to drying shrinkage and temperature changes after construction. The amount of expansion and contraction is large, and conventional joint materials of asphalt type or rubber cannot follow the expansion and contraction amount. Therefore, it is compatible with large prestressed concrete paving plates, and the joint device must be securely fixed even if it is detachable.

  In the technique of Patent Document 2, a rubber gasket as a joint member is interposed in a holding metal in a compressed state, but it is a detachable configuration and has the same problems as described above. If it exceeds the allowable range of expansion and contraction, it will come off. Moreover, when the amount of compression is increased, it becomes difficult to compress the gasket, resulting in problems in construction. Moreover, although the technique of patent document 3 is the structure which has fixed the holding member to the concrete pavement plate via the reinforcing bar anchor, the cross section M-shaped elastic joint material is a form which fits into a clamping metal fitting from the upper part. In any case, the joint member is not physically fixed to the holding member or the concrete pavement plate.

  Furthermore, many of the conventional joint members have a configuration in which the central portion is recessed when the joint member is in a contracted state. Ideally, the upper surface of the joint device can always maintain a horizontal state even if it has a stretching action. Furthermore, in order to maintain the joint device for a long period of time, it is also necessary to increase the rigidity of the mounting structure as the joint device so that the joint member is not easily detached from the concrete paving plate or damaged.

  In any case, if there is a gap in the free space, there is a problem that the wheel of a traveling vehicle or the like traveling may drop. In addition, when rainwater or groundwater enters the gaps between the prestressed concrete plates and the aircraft or the like travels, water is ejected at a high water pressure. These must be avoided.

  The present invention has been made based on such a technical background, and has been conceived to solve the conventional problems, and achieves the following object. An object of the present invention is to provide an expansion joint device for a concrete pavement plate that has a large amount of expansion and contraction, increases rigidity, is detachable but cannot be easily detached during normal times.

The present invention takes the following means in order to achieve the object.
The expansion / contraction joint device for a concrete pavement plate according to the first aspect of the present invention includes a pair of holding members having a substantially L-shaped cross section that are brought into contact with each end portion of the concrete pavement plate facing each other, and the end portions sandwiched between the pair of holding members. It is composed of a stretchable joint member which is fixed and has a plurality of spaces inside and which is stretchable, and a fixing member which is fixedly held by the concrete pavement plate and couples the holding member.

The expansion / contraction joint device for a concrete pavement plate according to the present invention 2 is characterized in that, in the present invention 1, the concrete pavement plate is a prestressed concrete pavement plate used for an airport.
The expansion joint device for a concrete pavement plate according to the present invention 3 is the joint member according to the first or second aspect, wherein the expansion joint member has a two-layer structure and has a plurality of enclosed space portions in at least one layer and elastically expands and contracts. It is characterized by being.

The expansion / contraction joint device for a concrete pavement plate of the present invention 4 is characterized in that, in the present invention 1 or 2, the fixing member is fixedly held on the concrete pavement plate via an anchor.
The expansion joint device for a concrete pavement plate according to the present invention 5 is characterized in that, in the present invention 1 or 2, the fixing member is a member that has a bending bend between the concrete pavement plate and is buried in mortar. And

  The expansion joint device for concrete pavement plate according to the present invention 6 is characterized in that, in the present invention 1 or 2, the fixing member has a bolt / nut for coupling the holding member in the previous period.

  In the expansion joint device for a concrete pavement plate according to the present invention, the joint member has a two-layer structure, and a plurality of spaces are provided in at least one layer, and the joint member is fixed to the holding member. Further, a through-curved metal was provided on the fixing member to which the holding member was attached. This improved the rigidity. Further, the joint member is fixed to the holding member, and the holding member is fixed to the fixing member with bolts / nuts. Although it is detachable by this, since a physically fixed state can be secured, the possibility that the joint member may be detached from the concrete paving plate even in an unexpected situation has been solved.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 is an embodiment in which the present invention is applied to a prestressed concrete pavement plate used for an airport, and is a cross-sectional view of an expansion joint device for a concrete pavement plate. FIG. 2 is a plan view showing the overall configuration of the expansion joint device for the concrete paving slab. 3 is a cross-sectional view taken along line XX of FIG. In the figure, the expansion joint device 1 for a concrete pavement plate is inserted and arranged in a play section 3 formed between a prestressed concrete pavement plate 2a and a concrete pavement plate (buffer plate) 2b which are installed facing each other.

  A stepped portion 4 for partially installing the expansion joint device 1 is provided at the end of the facing concrete pavement plate 2. In addition, although formation of this level | step-difference part 4 is formed by a cutting operation, formation by this cutting operation is a case where the expansion-contraction joint apparatus 1 is installed in the existing prestressed concrete pavement plate 2a. The cutting depth of the stepped portion 4 reaches the PC cable fixing portion 12 of the PC cable 11 provided for introducing stress. In the specification of the present embodiment that is not existing, the step 4 is provided in advance in the prestressed concrete pavement plate 2a, so this shaving work is not necessary. The expansion joint device 1 is installed in a state of covering the play portion 3 between the concrete paving plates 2 across the step portions 4 of the step portions 4 of the opposing concrete paving plates 2.

  An anchor 5 is embedded in the step portion 4. A fixing member 6 is disposed and fixed on the anchor 5. The fixing member 6 is made of a flat plate 6a and the like, and is a member for fixing the holding member 7 to which the below-described expansion joint device 1 is fixed to the concrete pavement plate 2. The fixing member 6 is composed of a flat plate material 6a as a main member. The flat plate material 6a is a strip-shaped steel plate, and is fixedly disposed along the upper portion of the edge in the longitudinal direction of the rectangular concrete pavement plate 2.

  One end of the fins 6b protrudes outward from the concrete pavement plate 2 and is fixed by welding at regular intervals from the flat plate material 6a. Further, the thread 6c is arranged and fixed along the longitudinal direction of the concrete pavement plate 2 and in parallel with the flat plate 6a across the tips of the plurality of feather bars 6b. The fixing member 6 is fixed to the concrete pavement plate 2 by fixing the thread 6 c to the anchor 5.

  The wings 6b, the thread 6c, and the anchor 5 are fixed by welding. Further, a plurality of nuts 6d are provided at a predetermined interval at a lower portion of the flat plate member 6a so as to be integrally fixed by welding. Further, on the lower part of the flat plate member 6a, through-bending bars 6e bent in a wave shape with a constant cycle are integrally provided on both sides of the nut 6d along the longitudinal direction of the concrete pavement plate 2. The fixing member 6 is configured in this way, and is symmetrically installed on the step portions 4 on both sides in the longitudinal direction of both concrete pavement plates 2.

  On the other hand, the holding member 7 is an L-shaped steel fitting having an L-shaped cross-section, and the back surface of one end (embedding side) 7a is pressed against the end 2c of the concrete pavement plate 2, and the other end (Surface side) 7 b is installed on the upper surface of the flat plate member 6 a of the fixing member 6. The upper surface of the other end portion 7b coincides with the upper surface of the concrete paving plate 2 and forms the surface of the concrete paving plate 2. The back surface of the other end 7b is fixed in contact with the upper surface of the flat plate 6a. The upper end surface of the nut 6d is in contact with the lower surface of the flat plate member 6a and is integrally fixed by welding or the like. In the other end portion 7b of the holding member 7, counterbore holes 7c are arranged at regular intervals in a portion corresponding to the position of the nut 6d. The counterbore hole 7c and the screw hole of the nut 6d have the same center line and can be bolted, so that the holding member 7 can be detachably fixed to the flat plate member 6a.

  The other end 7b is partially provided with a notch 7d (see FIG. 2), and a plurality of exhaust holes 7e are provided near the one end 7a. On the one end portion 7a side of the holding member 7, a rubber-made stretchable joint member 8 is provided in a state of being sandwiched between the opposing holding member 7. The joint member 8 is fixed to the holding member 7. This fixing has a structure in which a rubber joint member 8 is heated and vulcanized and bonded to the holding member 7 side subjected to rust prevention treatment and hot dip galvanization. The other end portion 7b is provided with a plurality of screw holes 7f for mounting work at regular intervals, which are jigs (not shown) for securing a predetermined mounting and fixing space for the joint member 8 during construction. ) Is a screw hole for attaching.

  By adopting such a configuration, the joint member 8 does not come off the holding member 7 and also ensures water-stopping properties. As described above, the joint member 8 is a joint member made of rubber and elastically expanding and contracting. This joint member 8 has an allowable amount capable of following the required amount of expansion and contraction. As shown in FIG. 1, the joint member 8 has a two-layer structure, and has two layers of an upper surface layer member 8a and a lower surface layer member 8b, each extending along the longitudinal direction. The upper surface layer member 8 a has a plurality of void portions 8 c having a hollow cross section along the horizontal direction straddling between both the holding members 7.

  The gap 8c has a space surrounded by a cross-sectional shape. By providing the gap 8c, it is possible to avoid a large step in the upper surface portion even if the upper surface layer member 8a expands or contracts due to the expansion / contraction action. In addition, when the pressure is relatively small, only the upper portion can be deformed. The lower surface layer member 8b is provided with a gap 8d between the lower surface layer member 8a and the lower surface layer member 8b also has a function of always supporting the upper surface layer member 8a during expansion and contraction. . In addition, the thickness of the lower surface layer member 8b is relatively thicker than the thickness of the upper surface layer member 8a, and the rigidity is increased against pressure from the upper surface.

  Both ends of the lower surface layer member 8 b are integrally fixed to the outer surface of the one end portion 7 a of both holding members 7 without being separated. Similarly, both ends of the lower surface layer member 8b are integrally fixed to the outer surfaces of the one end portions 7a of the both holding members 7 without being separated from each other. With this two-layer structure, the rigidity of the joint member 8 is increased, and the load resistance is maintained even when the joint member 8 is extended. That is, the load resistance of the joint member 8 is improved.

  1 shows a standard state (no compression, no extension) of the joint member 8, FIG. 4 shows a state where the joint member 8 is extended and the maximum free space is installed, and FIG. 5 shows a state in which the joint member 8 is contracted. It shows the time of installation of the minimum play. When the maximum clearance is set, the upper upper surface layer member 8a and the lower lower surface layer member 8b are in a substantially horizontal state, and the two upper surface layer members 8a and the lower surface layer member 8b are in contact with each other.

  This improves the load bearing performance. Even if a part of the wheel hits this idle space, the depression can be reduced. When the minimum clearance is installed, the two upper surface layer members 8a and the lower surface layer member 8b are crushed while being separated from each other, and the smoothness of the surface is maintained. Further, since the joint member on the surface is reduced in width, the load of the wheel or the like is supported by the holding members 7 on both sides, and the rigidity is increased.

  Next, the installation method of the expansion joint apparatus 1 is demonstrated. The expansion joint device 1 is carried into the site in a state where the holding member 7 and the fixing member 6 (integrated with the expansion member 8) are assembled with the countersunk screws 9. By using the countersunk screw 9, a flat upper surface can be secured without forming a convex portion on the surface. At this time, the thread 6c is fixed by welding on the feather 6b at a predetermined position. Further, the countersunk screws 9 are not screwed in all places, and a pair of several places (2 to 3) has an angle (temporary fixing jig also used as a spacing member, not shown) longer than both ends of the stepped portion 4 and a nut 6d. Use and install. After these preparations are completed, the expansion joint device 1 is installed on the step portion 4 of the concrete pavement plate 2.

  The interval of the one end portion 7 a of the holding member 7 is adjusted to the width of the concrete paving plate play space 3 using an interval adjusting jig, and abuts against the end portion 2 c of the concrete paving plate 2. When the unevenness of the end portion 2c of the concrete pavement plate is remarkable, a sponge 13 is pasted on the concrete pavement plate end portion 2c side of the one end portion 7a of the holding member in order to prevent mortar leakage. When the position, height, etc. are determined, the anchor 5 is driven and fixed to the through bar 6c by welding. The angle of the temporary fixing jig is removed with the spacing member attached. A non-shrink mortar 10 is poured into the space between the expansion joint device 1 and the stepped portion 4 of the concrete pavement plate 2. In the case of existing repairs, ultra-fast curing type non-shrink mortar. In addition, resin mortar may be used as long as it has equivalent performance instead of non-shrink mortar.

  The air escapes from the exhaust hole 7e provided in the holding member 7 so that the non-shrink mortar 10 flows uniformly to the end. By being able to evacuate, defects during placement of the non-shrink mortar 10 can be avoided. After the non-shrink mortar 10 is cured, the above-mentioned spacing material is removed, and the countersunk screw 9 is screwed in the removed part.

  As a result, the fixing member 6 is completely integrated with the concrete pavement plate 2 so as to be buried in the non-shrink mortar 10. Since the through-bending line 6e bent in a wave shape is also embedded in the non-shrink mortar 10, even if the flat plate 6a receives a force from below through the holding member 7, it does not peel off from the non-shrink mortar 10. Further, when the expansion joint device 1 is replaced, it can be processed by removing the countersunk screw 9 and removing the joint member 8 and the holding member 7 from the fixing member 6. At this time, if the tool is inserted into the notch 7d of the holding member with a tool such as a bar, the replacement work can be easily performed.

  In the replacement work, it is necessary to remove the non-shrink mortar 10 clogged in the exhaust hole 7e. However, this non-shrinking mortar removal work becomes unnecessary by inserting a plug (not shown) into the exhaust hole 7e before hardening of the non-shrinking mortar after the above-described pouring work of the non-shrinking mortar 10. In order to make the replacement work easier, before the expansion joint device 1 is installed, the non-shrink mortar 10 of the holding member 7 performs a mold release process (for example, curing with a mold release tape, etc.) on the contact surface. May be.

  The stretch joint device 1 is not necessarily the same as the length of the concrete pavement plate 2. In the present embodiment, in particular, the joint member 8 and the holding member 7 are configured to be shorter than that, and therefore, in the case of installation, a plurality of parts of the stretch joint device 1 are installed side by side. In this case, for example, it may be connected in advance at the factory by vulcanization adhesion or the like. Moreover, when connecting the some expansion joint apparatus 1 according to a concrete paving plate etc., what is necessary is just to join with a synthetic rubber type adhesive agent on the spot, for example.

Although the embodiment has been described above, it is needless to say that the present invention is not limited to this embodiment. For example, although the present embodiment has been described mainly as an expansion joint device for an airport, it goes without saying that the present invention can also be applied to other concrete paving plates.
In addition, one outer surface of the holding member 7 whose L-shaped cross-sectional shape described above forms an upper surface exposed at the upper surface portion, and the other forms a side surface exposed at the side surface portion. To do. As long as the upper surface and the side surface are formed, a member having a general or specially designed cross-sectional shape such as a rectangle or a triangle may be used even if the cross-sectional shape is not L-shaped.

FIG. 1 is a cross-sectional view illustrating an embodiment of an expansion joint device for a concrete paving plate. FIG. 2 is a plan view showing the overall configuration of the expansion joint device for the concrete paving slab. 3 is a cross-sectional view taken along the line XX of FIG. FIG. 4 is a cross-sectional view for explanation showing the maximum free space installation with the joint member extended. FIG. 5 is a cross-sectional view for explanation showing the minimum free space installation when the joint member is contracted.

Explanation of symbols

1 ... Telescopic joint device
2 ... Concrete paving plate
2a ... Prestressed concrete pavement version
2b ... Concrete paving plate (buffer plate)
2c ... end
3 ... Yuma Club
4 ... Step part
5 ... Anchor
6 ... Fixing member
6a ... Flat plate
6b ... Wings
6c ... Through muscle
6d ... Nut
6e ... through bending muscle
7: Holding member
7a ... One end (buried side)
7b ... the other end (surface side)
7c ... Counterbore
7d ... Notch
7e ... exhaust hole
8 ... Joint material
8a ... Upper surface layer member
8b ... lower surface layer member
8c ... void
8d: gap
9 ... Countersunk screw
10 ... Non-shrink mortar
11 ... PC cable
12 ... PC cable fixing part
13 ... Sponge

Claims (7)

A pair of holding members (7, 7) that are abutted against the ends of the concrete paving plates (2, 2) that face each other and that are disposed on the upper and side surfaces of the ends of the concrete paving plates (2, 2). 7) and
An endlessly stretchable joint member (8) having an end portion sandwiched and fixed between the pair of holding members (7, 7) and having a plurality of spaces therein;
A fixing member (6) fixedly held on the concrete pavement plate (2) and coupling the holding members (7, 7);
Telescopic joint device for concrete paving slab. In the expansion joint device of the concrete pavement plate according to claim 1,
The holding member (7, 7) has a substantially L-shaped cross section, and the L-shaped outer surface forms the upper surface of the upper surface portion and the side surface of the side surface portion. Telescopic joint device for paving plates. In the expansion joint device of the concrete pavement plate according to claim 1 or 2,
The concrete pavement plate (2) is a prestressed concrete pavement plate that is used for airports and is prestressed in advance. In the expansion joint device of the concrete pavement plate according to claim 1 or 2,
The expansion joint member (8) is a joint member for a concrete pavement plate characterized in that it is a joint member that has a two-layer structure and has a plurality of enclosed space portions (8c) in at least one layer and elastically expands and contracts. . In the expansion joint device of the concrete pavement plate according to claim 1 or 2,
The said fixed member (6) is fixedly held by the said concrete pavement plate via an anchor (5), The expansion joint device of the concrete pavement plate characterized by the above-mentioned. In the expansion joint device of the concrete pavement plate according to claim 1 or 2,
The said fixed member (6) has a bending reinforcement (6e) between the said concrete pavement plates, and is a member embedded in the mortar (10), The expansion joint device of a concrete pavement plate characterized by the above-mentioned. In the expansion joint device of the concrete pavement plate according to claim 1 or 2,
The fixing member (6) has a bolt / nut (6d, 9) for joining the holding member (6), and a concrete pavement plate expansion / contraction joint device.

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