JP2012162955A - Expansion device for bridge and construction method thereof - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an expansion device for a bridge, in which first and second face plates for load supporting and a water cutoff sheet can be easily replaced and updated at a construction site, and which is excellent in load bearing ability, durability, and the like.SOLUTION: An expansion device for a bridge comprises: first and second plate pedestals 1a, 1b fixed to a bridge body F or a bridge abutment in a parallel state at a substantially horizontal and equivalent level; first and second face plates 5a, 5b mounted on the plate pedestals, respectively, in a forward-facing and overhanging state; a water cutoff sheet W1 of a bridge expansion spacing S interposed between the plate pedestals and the face plates; and wall pieces 10a, 10b partitioning the face plates and post-cast concrete C or pavement by integrally standing from the plate pedestals respectively. A plurality of stud bolts 4a, 4b scattered and distributed along the bridge expansion spacing from the plate pedestals are upward and projectingly provided integrally, the water cutoff sheet and the first and second face plates are detachably inserted from above to the stud bolts, and fixing nuts 7a, 7b are fastened respectively.

Description

  The present invention relates to a telescopic device for a bridge such as a road bridge and a railway bridge, and a construction method thereof.

  In the expansion joint for road bridge described in Japanese Patent No. 4421647, post-cast concrete (9) is also placed on a trapezoidal bottom plate (10) projecting forward to the road bridge joint (gap). This is a structure that supports the load of the passing vehicle, but it is not necessary to scoop the post-cast concrete (9) when repairing the expansion joint, and the face plate (7) and the sealing plate of rainwater held by the face plate (7) (5) is considered to be a publicly known technique that most closely approximates the present invention in that it can be replaced with a new one.

Japanese Patent No. 4421647

  However, in the structure of the above-mentioned known invention, the flexible seal plate (5) such as rubber is covered with the upper edge of the steel vertical plate (4) and is pressed by the steel face plate (7) from above. Since the seal plate (5) receives the weight of falling earth and sand, pavement peeling pieces and other various solids that have entered and accumulated inside the seal plate (5), the top of the vertical plate (4) There is a risk of breaking as if it is torn off by the edge, drooping, or even dropping off, and it is impossible to maintain a durable water stop effect at the road bridge joint.

  In this case, the seal plate (5) is not only the concave and convex portions forming the corrugated space (joint clearance) (20) between the vertical plates (4), but also both the vertical plates at the inclined portion at the boundary position. (4) Since it is pressed and fixed by the face plate (7) along the upper edge, both vertical plates (4) are separated from each other (bridge axis direction) in which the wave space (joint clearance) (20) expands. When it moves to, an unreasonable twist cutting force acts on the sealing plate (5) and it will be damaged early, and the durable water stop effect cannot be maintained also from the meaning. .

  Further, the steel face plate (7) is directly placed on the base plate (6) without interposing the side portion of the seal plate (5) on the upper surface of the steel base plate (6). Since the nut (23) is configured to be fastened, not only the fixing strength and stability of the seal plate (5) are inferior, but also the base plate (6) fastened by the bolt (22) and the nut (23). ) And the face plate (7) are in metal touch, and there is a problem that vibration and noise occur when the vehicle is passing.

  Further, in the configuration of the known invention, the protective cap (25) is passed from the bolt head receiving stepped hole (29) distributed in the face plate (7) through the nut mounting hole (21) of the base plate (6). Not only rain water, but also fallen earth and sand from pavements, strips of pavements, tire wear pieces, and other various solids infiltrate and accumulate in the box, which may cause bolts (22) and nuts (23) to rust. Together, the internal cleaning of the protective cap (25) and the removal and replacement of the face plate (7) and the seal plate (5) cannot be easily performed, which requires a lot of work time and labor.

  SUMMARY OF THE INVENTION The present invention aims to improve such a problem, and in order to achieve the object, in claim 1, for a bridge constructed so as to straddle a gap between bridge bodies or between a bridge body and an abutment. Telescopic device,

  First and second plate cradles attached to and fixed to the bridge body or abutment in a parallel state facing each other at an almost horizontal equivalent level;

  First and second face plates for load support that are respectively mounted on the first and second plate cradles, as cantilevered states that project forward a certain length forward on the gap,

  In order to partition the rear end surface portion of the first and second face plates from post-cast concrete or pavement, partition wall pieces that stand integrally upward from the first and second plate cradles,

  A flexible waterproof sheet that stops the gap between the first and second face plates and the first and second plate cradles by being installed between the upper and lower sides,

  A plurality of stud bolts scattered respectively along the width direction of the bridge from the first and second plate cradles are integrally projected upward, while the stud bolt receiving through holes are formed as the first and second face plates. And corresponding to each water stop sheet,

  The water stop sheet and the first and second face plates are detachably inserted into the stud bolts on the first and second plate cradle side from above, and the fixing nuts are respectively fastened, thereby extending the first and second face plates. It is characterized in that it is determined so as to exert a resistance force of a load acting on the front end side.

  Further, in claim 2, either one or both of the first and second plate cradles on which the first and second face plates are mounted, and the upper and lower sides of the substantially horizontal deck plate of the steel deck forming the bridge body. In addition to installing each of the road cross slope adjustment plates,

  A plurality of stud bolts scattered and distributed along the bridge width direction from the deck plate of the steel floor slab are integrally projected upward, while the stud bolt receiving through holes are formed in the adjustment plate and the plate cradle. Forming each corresponding,

  The adjusting plate and the plate receiving base are inserted into the stud bolt on the deck plate side from above so as to be freely inserted and removed, and the fixing nuts are respectively fastened.

  According to a third aspect of the present invention, a sheet-like elastic packing is interposed between one or both of the first and second plate cradles and the adjustment plate of the road crossing gradient.

  In claim 4, the bridge expansion and contraction device is constructed so as to straddle the gap between the bridge bodies or between the bridge body and the abutment,

  First and second plate cradles attached to and fixed to the bridge body or abutment in a parallel state facing each other at an almost horizontal equivalent level;

  First and second filler plates respectively mounted on the first and second plate cradle;

  As a cantilever state projecting a certain length forward to the gap, the load supporting first and second face plates respectively mounted on the first and second filler plates;

  In order to separate the rear end surface portion of the first and second face plates and the rear end surface portion of the first and second filler plates from the post-cast concrete or / and the pavement, the first and second plate cradles are integrally and upwardly respectively. A partition wall piece standing up;

  A flexible water-stop sheet that stops water between the first and second filler plates and the first and second plate cradles by being installed between the upper and lower sides,

  A plurality of primary stud bolts scattered from the first and second plate bases along the bridge width direction are integrally projected upward, and the primary stud bolt receiving through holes are formed in the first through-holes. While forming corresponding to 2 filler plate and water stop sheet respectively,

  As a relationship in which a plurality of secondary stud bolts are scattered along the bridge width direction from the first and second filler plates, and are scattered at different positions from the primary stud bolts on the first and second plate cradle sides. While projecting upward integrally, the secondary stud bolt receiving through hole is formed corresponding to each of the first and second face plates,

  The water stop sheet and the first and second filler plates are detachably inserted from above into the primary stud bolts on the first and second plate cradle sides, and after fastening the fixing nuts, the first and second filler plate sides The first and second face plates are inserted into the secondary stud bolts from above so that they can be freely inserted and removed, and the fixing nuts are respectively fastened to counteract the load acting on the front end of the first and second face plates. It is characterized in that it can be demonstrated.

  In claim 5, the bridge expansion and contraction device is constructed so as to straddle the gap between the bridge bodies or between the bridge body and the abutment,

  First and second plate cradles attached to and fixed to the bridge body or abutment in a parallel state facing each other at an almost horizontal equivalent level;

  First and second filler plates respectively mounted on the first and second plate cradle;

  As a cantilever state projecting a certain length forward to the gap, the load supporting first and second face plates respectively mounted on the first and second filler plates;

  In order to separate the rear end surface portion of the first and second face plates and the rear end surface portion of the first and second filler plates from the post-cast concrete or / and the pavement, the first and second plate cradles are integrally and upwardly respectively. A partition wall piece standing up;

  By being installed between the upper and lower sides of the first and second face plates and the first and second filler plates, a flexible water-stop sheet that stops the gap is provided.

  A plurality of primary stud bolts scattered from the first and second plate bases along the bridge width direction are integrally projected upward, and the primary stud bolt receiving through holes are formed in the first through-holes. While corresponding to each of the two filler plates,

  As a relationship in which a plurality of secondary stud bolts are scattered along the bridge width direction from the first and second filler plates, and are scattered at different positions from the primary stud bolts on the first and second plate cradle sides. While projecting upward integrally, the secondary stud bolt receiving through hole is formed corresponding to each of the first and second face plates and the water stop sheet,

  The first and second filler plates are inserted into the primary stud bolts on the first and second plate cradles from above and detachably inserted from the upper side. After fastening nuts, the secondary studs on the first and second filler plates are tightened. By inserting the water-stop sheet and the first and second face plates into the bolts from above and removably inserting them, and fastening the fixing nuts respectively, the counteracting force of the load acting on the projecting front end side of the first and second face plates can be reduced. It is characterized in that it can be demonstrated.

  In claim 6, the bridge expansion and contraction device is constructed so as to straddle the gap between the bridge bodies or between the bridge body and the abutment,

  First and second plate cradles attached to and fixed to the bridge body or abutment in a parallel state facing each other at an almost horizontal equivalent level;

  First and second filler plates respectively mounted on the first and second plate cradle;

  As a cantilever state projecting a certain length forward to the gap, the load supporting first and second face plates respectively mounted on the first and second filler plates;

  In order to separate the rear end surface portion of the first and second face plates and the rear end surface portion of the first and second filler plates from the post-cast concrete or / and the pavement, the first and second plate cradles are integrally and upwardly respectively. A partition wall piece standing up;

  Inserted between the first and second filler plates and the first and second plate cradles or between the first and second face plates and the first and second filler plates. With a flexible water-stop sheet that stops the gap between the play,

  A plurality of stud bolts scattered respectively along the bridge width direction from the first and second plate bases are integrally projected upward, while the stud bolt receiving through holes are formed in the first and second filler plates. And corresponding to each of the first and second face plates and water-stop sheet,

  By inserting the water stop sheet, the first and second filler plates, and the first and second face plates from above into the stud bolts on the first and second plate cradle side so as to be freely detachable and fastening the fixing nuts, 1 and 2 is characterized in that it is determined so as to be able to exert a resistance force of a load acting on the front end side of the face plate.

  In claim 7, the post-cast concrete dam wall legs are integrally suspended from either one or both of the first and second plate cradle,

  A plurality of embedding stud anchors made of deformed steel bars or steel plates are integrally extended and extended in the rearward direction from the first and second plate cradle and / or post-cast concrete dam wall legs.

  In claim 8, the front end surface portions of the first and second face plates that respectively protrude from the first and second plate pedestals to the gap are corrugated, saw-toothed or comb extending correspondingly in plan view along the gap. It is shaped into a shape or a linear shape extending substantially in parallel.

  According to a ninth aspect of the present invention, a plurality of stud bolts integrally projecting upward from the first and second plate cradles are distributed in one or a plurality of rows arranged along the bridge width direction.

  In claim 10, the rear end surface of the first and second face plates and the front and rear of the partition wall pieces of the first and second plate holders, or after the first and second face plates and the first and second filler plates. A sealant for sealing rainwater or solid matter is filled between the end surface portion and the front and rear of the partition wall pieces of the first and second plate cradles.

  According to the eleventh aspect, a rubber coating for anticorrosion and anti-slip is vulcanized and bonded to the surfaces of the first and second face plates.

  According to a twelfth aspect of the present invention, the surfaces of the first and second face plates are roughened to prevent slipping.

  In claim 13, the stud bolt receiving through hole of the first and second face plates is opened in a stepped form with the upper end portion being a recessed groove of the fixing nut, and rainwater or solid matter is sealed inside the groove. It is characterized by being filled with a sealant.

  In claim 14, the waterproof sheet is formed in a U-shaped cross section or a V-shaped cross section that hangs from the first and second plate cradle, and the product length of the first and second plate cradle, the length of one lane, or two on one side. Extend along the width of the bridge by the entire length beyond the lane,

  At least one end cover of the water stop sheet has a low road crossing slope, and an end cover that can be freely bent is attached and integrated,

  A water leakage discharge port is formed on the bottom surface near the one end that is blocked by the end cover, or a water leakage discharge hose is connected in communication.

  In claim 15, the waterproof sheet is formed as a flexible sheet such as rubber or synthetic resin, and is formed into a U-shaped section, a V-shaped section or a corrugated section that hangs from the first and second plate cradles,

  The bend is filled with an elastically deformable filler such as urethane foam, styrofoam, glass wool or the like for preventing damage to the water-stop sheet due to intrusion of various solid materials.

  In claim 16, each post-cast concrete dam wall leg is integrally suspended from the first and second plate cradles, and

  The flexible drainage sheet with a U-shaped section or a V-shaped section suspended from the middle height position or the lower end of both post-cast concrete dam wall legs makes water leaking from the waterstop sheet low in road crossing gradient. It is characterized in that it is determined to discharge downward from a leak water discharge hose communicated with one end.

  In claim 17, the post-cast concrete weir wall legs are integrally suspended from the first and second plate cradles,

  The pair of draining pieces attached and fixed to the lower end portions of the both post-cast concrete dam wall legs are characterized in that the water leaking from the water stop sheet is isolated so as not to be transmitted to the standing inner wall surface.

  According to an eighteenth aspect of the present invention, it is characterized in that the riding-up prevention pieces to the other side facing each other at the time of an earthquake are integrally suspended from the front end portions where the first and second face plates protrude above the gap.

  In claim 19, between the first and second filler plates and the first and second face plates mounted on the first and second filler plates, or between the first and second plate support and the first and second filler plates mounted on the first and second plate plates. A sheet-like elastic packing is inserted and installed between the upper and lower sides.

  In claim 20, the partition wall pieces of the first and second plate cradles are bent and integrally bent from the rear ends of the first and second plate cradles, or are attached and fixed as separate metal plates in a vertical state or an inclined state. It is characterized by that.

  According to a twenty-first aspect of the present invention, rib anchors (guide plates) for preventing pavement flow are integrally projected from the partition wall pieces of the first and second plate bases in the rearward direction.

  According to a twenty-second aspect of the present invention, the partition wall pieces of the first and second plate cradles are extended in a wave shape or other zigzag shape bent in plan view along the bridge width direction.

  In Claim 23, the base end portion of the slide top cover serving as a walking road surface is attached to and integrated with one of the first and second face plates, and the tip end portion of the slide top cover is attached to the first and second face plates. It is mounted so that it can slide along the other side.

  Furthermore, in Claim 24, as a method of constructing the bridge extension device according to Claim 1,

  A plurality of studs are distributed in a dotted manner along the width of the bridge. First and second plate cradles, in which the bolts are integrally protruded upward, and a plurality of embedded stud anchors are integrally extended in the rear direction away from each other,

  First and second angle type steel plates for temporary installation having upright pieces facing the partition wall pieces of the first and second plate holders and stud bolt receiving through holes of the first and second plate holders;

  Prepare a plurality of suspension bars that hold the first and second plate cradle and the first and second angle-shaped steel plates at a time,

  Assemble by inserting the first and second angle-shaped steel plates from above into the stud bolts on the first and second plate cradle side so that they can be freely inserted and removed, and tightening each of the temporary fixing nuts,

  A plurality of suspension bars extending in the direction of the bridge axis perpendicular to the first and second plate cradle and the first and second angle steel plates are parallel to the boxed space for post-cast concrete for the bridge body or the abutment. As you pass,

  While holding the first and second plate cradle and the first and second angle-type steel plates in a suspended state that crawls to the suspension bar by fixing means such as screw fasteners and spot welding,

  After inserting and setting up a backup material such as styrofoam which becomes the weir wall of post-cast concrete into the play space, the post-cast concrete is placed from above into the boxed space of the bridge body or abutment,

  Then, after curing the cast concrete, remove the fixing nut from the stud bolt on the first and second plate cradle side, remove the backup material, and unlock the fixed state of the first and second plate cradle with respect to the suspension bar, By removing the first and second angle-shaped steel plates together with the suspension bars, the water-stopping sheet and the second steel plate are placed from above onto the stud bolts of the first and second plate cradles remaining in the punching recesses of the cast concrete. The first and second face plates are detachably inserted, and the fixing nuts are respectively fastened.

  According to the configuration of claim 1, the water stop sheet and the first and second face plates are sequentially inserted from above into a plurality of stud bolts that integrally protrude upward from the first and second plate bases, and the studs By fastening a fixing nut to the bolt, the water-stop sheet and the first and second face plates that hold it from above are assembled and integrated stably and firmly on the vast horizontal surface of the first and second plate cradle. Can do.

  When the telescopic device is in use, the load supporting first and second face plates that project a certain length from the front ends of the first and second plate cradles to the bridge play have a bending moment (load) that falls forward. The rear part of the first and second face plates is a plurality of stud bolts projecting from the first and second plate cradles in a scattered distribution state, and the screws of the fixing nuts. The fastening force can exert a strong counter force, and it is remarkably excellent in load resistance and durability.

  Further, the first and second faceplates may be supported by the front end surfaces of the first and second faceplates, for example, in the form of a wave shape, a sawtooth shape, and a comb shape in a plan view. Since the front end portion of the plate pedestal extends in parallel along the bridge gap (bridge width direction), it is interposed between the upper and lower sides of the first and second face plates and the first and second plate pedestals. There is no risk that the waterproof sheet will be damaged due to the torsional cutting force as in the known invention described at the beginning, and it is sandwiched between the vast horizontal planes of the first and second face plates and the first and second plate holders. In addition, there is no fear of peeling or dropping off of the water-stopping sheet in combination with the penetration of a large number of stud bolts scattered at both ends of the rear part.

  Furthermore, the water-stop sheet is made of a flexible material such as rubber or synthetic resin, and is in a horizontal state sandwiched between the first and second face plates and the first and second plate cradles, In other words, it functions as a sheet-like elastic packing or elastic mat, and as a result, various effects of long-term stable waterproofing, vibration isolation and soundproofing can be obtained.

  And even if such a water stop sheet deteriorates earlier than the first and second face plates and the first and second plate cradles, it stands up integrally from the rear end of the first and second plate cradles. Since the partition wall piece forms a partition form with post-cast concrete or pavement, the first and second face plates and the water-stop sheet can be replaced with new ones, without the need to strike the post-cast concrete or pavement. The workability at the time of repair is remarkably excellent.

  If the configuration of claim 2 is adopted, the bridge body can be applied not only to a bridge made of a concrete slab but also to a bridge made of a steel slab. It can be done without any problems. In that case, if the structure of Claim 3 is employ | adopted, effects, such as a water stop, vibration proof, and soundproofing, are carried out by the sheet-like elastic packing interposed between the upper and lower sides of the 1st and 2nd plate cradle and the gradient adjustment plate. Can also be obtained.

  In particular, according to the configuration of claim 4, 5 or 6, in addition to obtaining the above-mentioned effect of claim 1, the first and second rocking fulcrums for supporting the load are provided with the first and second pivot plates. The first and second filler plates inserted between the upper and lower sides of the two-plate cradle can be moved forward on the bridge gap, and as a result, it is compatible with the use of the first and second filler plates. As a result, the load carrying capacity and durability are further improved.

  Further, not only the first and second face plates and the water-stop sheet, but also the first and second filler plates can be replaced and renewed. There is an effect that the face plate can be replaced and updated with only one face plate (single unit having a product length), and convenience such as inspection and repair is improved.

  Any of the first, fourth, fifth, and sixth aspects has an effect of obtaining an embedded state of the expansion / contraction device having a high bonding strength with post-cast concrete, particularly when the configuration of the seventh aspect is employed.

  If the structure of Claim 8 is employ | adopted, there exists an effect which can obtain the various expansion-contraction apparatus of the specification according to the allowable expansion-contraction amount, the vehicle traffic amount, etc.

  If the structure of Claim 9 is employ | adopted, there exists an effect which can adjust the strength of the load support force of the 1st and 2nd faceplate and its opposing force by the layout, such as the number and arrangement | sequence of a stud bolt.

  If the structure of Claim 10 is employ | adopted, the raindrops, the fallen earth and sand from a passing vehicle, the wear piece of a tire, and other various solid substances are the rear-end surface part of the 1st, 2nd faceplate, the 1st, 2nd plate Between the front and rear of the partition wall piece of the cradle, and between the front and rear of the rear end surface portion of the first and second face plates and the first and second filler plates and the partition wall piece of the first and second plate cradles, respectively. The possibility of intrusion / deposition can be sealed.

  If the structure of Claim 11 and 12 is employ | adopted, the safety | security in vehicle traffic can be ensured by the rubber coating or uneven rough surface of the 1st and 2nd faceplate which forms a road surface.

  If the structure of Claim 13 is employ | adopted, the above-mentioned various solid substance and rain water intrusion will be sealed with the sealant with which the immersion concave groove of the fixing nut was filled, and the stud bolt and the fixing nut will have rough rust. And prevent deterioration.

  If the structure of Claim 14 is employ | adopted, the leakage dam dam can be formed with the end cover of a water stop sheet | seat, and the road crossing slope is low (downstream) by the water leak outlet or the water leak hose opened in the bottom face. Side) It has the effect of preventing water leakage on the road surface by reliably leaking water to the shoulder side.

  If the structure of Claim 15 is employ | adopted, a water stop sheet | seat will be damaged at an early stage by the fallen earth and sand from a passing vehicle, the wear piece of a tire, the peeling piece of a pavement, and other various solid substance invading and accumulating. There is an effect that can be easily prevented by the elastically deformable filler filled inside.

  If the configuration of claims 16 and 17 is adopted, even if water leaks from now on due to deterioration or breakage of the water stop sheet, the drainage sheet or drain piece provided at the lower stage position, The leaked water flows down the bridge body (concrete floor slab) and the abutment, and can prevent the possibility of rusting the steel main girder and its support (shoe) or causing salt damage.

  If the structure of Claim 18 is employ | adopted, there exists an effect which can prevent the danger that the pair with which the 1st and 2nd faceplates face will climb on the other party side at the time of an earthquake, and will be damaged.

  If the structure of Claim 19 is employ | adopted, effects, such as water stop, vibration proof, and soundproofing, can be acquired by the sheet-like elastic packing similarly to the said effect of Claim 3.

  If the structure of Claim 20 is employ | adopted, the partition wall piece with the post-cast concrete or pavement in the 1st, 2nd plate cradle, the integrated product from the angle type | mold steel plate, welding of a separate metal plate material, screw fastening Pavement asphalt that can be manufactured appropriately as a fixed integration by means of attachment such as tools, especially if the partition wall piece is attached and fixed in an inclined posture. It is also possible to obtain an effect of compacting with high density.

  If the structure of Claim 21 is employ | adopted, the pavement which is lined up on the surface of post-cast concrete by the rib anchor (guide plate) which protrudes back from the partition wall piece of a 1st, 2nd plate cradle is vehicle In addition to being able to prevent the pavement surface from becoming uneven due to frequent traffic, it also helps to protect the snow blades from being damaged in snowfall areas.

  If the configuration according to claim 22 is adopted, the vibration or shock of the vehicle is affected by the fact that the oblique side portion having a wave shape in plan view or other zigzag shape comes into contact with the tire of the passing vehicle in a non-perpendicular crossing state. The effect of vibration proofing, soundproofing and running stability can be obtained.

  If the structure of Claim 23 is employ | adopted, there exists an effect which can be implemented as an expansion-contraction apparatus for the sidewalk of a bridge by attaching the slide top cover used as a walking road surface to the said 1st, 2nd faceplate.

  If the method of claim 24 is adopted in constructing the bridge expansion and contraction device according to claim 1, the first and second plates having a substantially L-shaped cross section provided with a partition wall piece with post-cast concrete or pavement. The cradle becomes a formwork for forming the receiving recesses of the first and second faceplates, and the first and second plate cradles that form the formwork are boxed space after placing and curing post-cast concrete Since it can be used as it is without being lifted off and removed, it is remarkably excellent on site construction and convenience.

1 is a perspective view showing a first embodiment of a bridge extension device according to the present invention. It is sectional drawing of FIG. It is a top view which shows the 1st modification of 1st Embodiment. FIG. 4 is a cross-sectional view taken along line 4-4 of FIG. It is a top view which shows the 2nd modification of 1st Embodiment. FIG. 6 is a sectional view taken along line 6-6 of FIG. It is a top view which shows the 3rd modification (for a sloping bridge) of 1st Embodiment. It is a top view which shows the 4th modification of 1st Embodiment. FIG. 9 is a sectional view taken along line 9-9 in FIG. 8. It is a top view which shows the 5th modification (for a sloping bridge) of 1st Embodiment. It is sectional drawing which shows the 6th modification of 1st Embodiment. It is sectional drawing which shows the 7th modification of 1st Embodiment. It is a top view which shows the 8th modification of 1st Embodiment. FIG. 14 is a cross-sectional view taken along line 14-14 of FIG. It is a fragmentary sectional view showing the 9th modification of a 1st embodiment. It is a top view which shows the 10th modification of 1st Embodiment. FIG. 17 is a cross-sectional view taken along line 17-17 in FIG. 16. It is sectional drawing which shows the 11th modification of 1st Embodiment. It is sectional drawing which shows the 12th modification of 1st Embodiment. It is a top view which shows the 13th modification of 1st Embodiment. It is a 21-21 line sectional view of Drawing 20. It is sectional drawing which shows the 14th modification of 1st Embodiment. It is sectional drawing which shows the 15th modification of 1st Embodiment. It is sectional drawing which shows the 16th modification of 1st Embodiment. It is a side view of FIG. FIG. 25 is a perspective view showing the drainage sheet of FIG. 24 extracted. FIG. 27 is a sectional view taken along line 27-27 in FIG. 26. It is sectional drawing which shows the 17th modification of 1st Embodiment. It is sectional drawing which shows the 18th modification of 1st Embodiment. It is sectional drawing which shows the 19th modification of 1st Embodiment. It is sectional drawing which shows the construction method of 1st Embodiment. It is sectional drawing of the construction process following FIG. It is sectional drawing of the construction completion state following FIG. It is a slope view which shows 2nd Embodiment of the expansion-contraction apparatus for bridges concerning this invention. It is sectional drawing which shows 3rd Embodiment of the expansion-contraction apparatus for bridges concerning this invention. FIG. 36 is a partial perspective view showing only one side of FIG. It is sectional drawing corresponding to FIG. 35 which shows the partial modification of the said 3rd Embodiment. It is sectional drawing which shows 4th Embodiment of the expansion-contraction apparatus for bridges concerning this invention. It is a top view which shows 5th Embodiment of the expansion-contraction apparatus for bridges concerning this invention. FIG. 40 is a cross-sectional view taken along line 40-40 in FIG. 39. It is sectional drawing which shows the 1st modification of 5th Embodiment. It is a partial slope figure which extracts and shows only one side of Drawing 41. It is a top view which shows the 2nd modification of 5th Embodiment. FIG. 44 is a cross-sectional view taken along line 44-44 in FIG. 43. It is sectional drawing corresponding to FIG. 40 which shows the 3rd modification of 5th Embodiment. It is sectional drawing which shows 6th Embodiment of the expansion-contraction apparatus for bridges concerning this invention. It is sectional drawing which shows 7th Embodiment of the expansion-contraction apparatus for bridges concerning this invention.

  Hereinafter, the specific configuration of the present invention will be described in detail with reference to the drawings. In FIGS. 1 to 33 showing the bridge expansion and contraction device (J1) according to the first embodiment of the present invention, (1a) and (1b) are: A pair of substantially horizontal steel plates 1 and 2 that extend a certain length (product length) (for example, about 1000 mm or about 1800 mm) in the width direction of the bridge along the seam (bridge) (S) of the road bridge. It is a plate pedestal, and the front ends facing each other form a substantially parallel straight line along the bridge clearance (S).

  Moreover, the post-concrete concrete weir wall legs (2a) and (2b) having the same height from the front ends of the first and second plate cradles (1a) and (1b) are continuously suspended from each other. Each of the first and second plate cradles (1a) (1b) and the post-cast concrete weir wall legs (2a) (2b) is shaped into an overall inverted L shape. Such almost inverted L-shaped modeling is possible not only by welding them and cutting the H-shaped steel, but also by using angle-shaped steel.

  (3a) and (3b) are a plurality of pieces that are integrally extended and extended in an array distribution state that maintains a required left-right mutual distance from the post-cast concrete dam wall legs (2a) and (2b) in the rearward direction. One embedded stud anchor, which is made of a deformed steel bar in FIGS. 1 and 2, may be replaced by a metal screw bar or a steel plate (flat bar).

  Further, when the first and second plate cradle (1a) (1b) is not provided with vertical post-concrete concrete weir wall legs (2a) (2b) as shown in FIG. 14 and FIGS. The above-described embedding stud anchors (3a) and (3b) may be integrally extended and extended from the substantially horizontal first and second plate cradles (1a) and (1b) themselves in the rear direction. .

  Reference numerals (4a) and (4b) denote a plurality of stud bolts that are integrally projected upward from the first and second plate bases (1a) and (1b). In FIGS. Although it is distributed in a staggered (alternate) arrangement state in a row, the number and arrangement thereof can be appropriately increased or decreased according to the allowable extension / contraction amount of the extension device and other specifications.

  Reference numerals (5a) and (5b) denote first and second face plates for supporting a load made of a processed steel plate product, cast iron product, aluminum alloy casting, and the like. ) And a cantilever state in which a predetermined length (L1) (L2) is projected forward on the bridge gap (S). 1b). Therefore, the front end portions of the first and second plate cradles (1a) and (1b) are used as the swing fulcrums (P1) and (P2) during the use of the pair of first and second faceplates (5a and 5b). ), A load (bending moment) that causes a downwardly inclined state acts.

  The first and second face plates (5a) and (5b) are projected from the first and second plate cradles (1a) and (1b) toward the bridge gap (S). (S) is shaped as a straight line extending substantially parallel to the bridge width direction, but as the planar shape of the front end face portion facing each other, considering the size of the allowable expansion and contraction amount in the expansion device and other specifications, 3 and 4 may be shaped into a correspondingly bent wave shape, a sawtooth shape as in FIGS. 5 to 7, a comb shape as in FIGS.

  In particular, if it is formed as a sawtooth shape or a comb shape as shown in FIGS. 7 and 10, the first and second face plates (5 a, 5 b) along the bridge axis direction (vehicle traveling direction). By keeping the concavo-convex portions parallel to each other at a certain angle (α) that is non-perpendicular (eg, about 60 degrees) with the bridge gap (S) (bridge width direction), the constant angle (α) is reduced to about There is an advantage that it can be implemented not only for a straight bridge as shown in FIGS. 5 and 8 at 90 degrees, but also for a special inclined bridge (skew bridge) or a curved girder bridge. In any case, the mutual gap (joint clearance) (D) between the projecting front end face portions of the first and second face plates (5a) and (5b) opens to the road surface. The first and second face plates (5a) and (5b) of the steel plate are preferably subjected to a surface treatment such as galvanization, zinc spraying, and coating.

  (6a) and (6b) are through holes for receiving the stud bolts (4a) and (4b) on the first and second plate cradle (1a) and (1b) side. ) (5b). Moreover, each of the stud bolt receiving through holes (6a) and (6b) is opened in a stepped form in which the upper end portion thereof becomes the large recessed groove (8a) (8b) of the fixing nut (7a) (7b). The fixing nut (7a) (7b) fastened to the stud bolt (4a) (4b) from above can be inserted from the surface of the first and second face plates (5a) (5b). Yes. Inside the concave grooves (8a) (8b) into which the fixing nuts (7a) (7b) are inserted, sealants (9a) (9b) for sealing the falling earth and sand and other various solids from the passing vehicle and rainwater. Are preferably filled.

  (10a) and (10b) are rear-end concrete (C), which will be described later, on the rear end surface portions of the first and second face plates (5a) and (5b) mounted on the first and second plate bases (1a) and (1b). ) Or pavement (A) is a partition wall piece that stands up integrally from the rear end of the first and second plate cradles (1a) and (1b) and linearly extends along the bridge width direction. Extend to.

  The partition wall pieces (10a) and (10b) of such post-cast concrete (C) or pavement (A) are separated from the first and second plate holders (1a) and (1b) in FIGS. As steel plates (flat bars), they are welded vertically to their respective plate bases (1a) and (1b), but using screw fasteners (11a) and (11b) as shown in FIG. 12 instead of welding. In addition, each of the plate holders (1a) (1a) (1b) may be mounted and fixed in a vertical state. 1b) Even if it bends in a continuous vertical state from the rear end, it does not matter.

  Furthermore, when pavement (A) is covered on the surface of post-cast concrete (C), separate partition wall pieces (10a) and (10b) of separate steel plates (flat bars) as shown in FIG. It is determined that the asphalt that has been piled up is welded to the two-plate cradle (1a) (1b) at a constant angle (β) so that the overlaid asphalt can be compacted with a rolling roller outside the figure. preferable. (12a) (12b) are backing support ribs of the partition wall pieces (10a) (10b) in the inclined state.

  1 to 15, the partition wall pieces (10a) and (10b) rising from the first and second plate cradles (1a) and (1b) extend in a straight line shape in plan view along the bridge width direction. However, it may be extended in the width direction of the bridge as a wave shape that is bent in plan view as shown in FIGS. 16 and 17 or other zigzag shape, so that vibration and noise of the passing vehicle can be suppressed. effective.

  In any case, the partition wall pieces (10a) and (10b) standing up from the first and second plate bases (1a) and (1b), and the plate bases (1a) and (1b) mounted on the plate bases (1a) and (1b). Between the front and rear surfaces of the rear facets of the 1 and 2 face plates (5a) and (5b), the sealant (13a) and (13b) are respectively filled from above, so that rainwater enters the gap and from the passing vehicle. It is preferable to prevent intrusion of falling earth and sand, tire wear pieces, and other various solid materials.

  Further, rough surfaces (14a) (14b) for preventing slippage of a passing vehicle as shown in FIG. 18 by plastic working or casting on the surface (road surface) of the first and second face plates (5a) (5b). Or separate rubber coatings (15a) (15b) that serve as anti-slip and anti-corrosion (corrosion protection) for the passing vehicle, as shown in FIG. 19, the first and second face plates (5a) (5b) It can also be vulcanized and bonded to the surface.

  When the pavement (A) is laid on the surface of the post-cast concrete (C), the rib anchor (guide plate) (16) for preventing the flow of the pavement (A) is formed as shown in FIG. You may project from the any one said partition wall piece (10a) in a 2 plate stand (1a) (1b) integrally in the back direction. Such a rib anchor (guide plate) (16) is also useful for preventing breakage of the blade edge in the snow removal work vehicle.

  Further, the first and second face plates (5a) (5b) projecting forward on the bridge gap (S) are prevented from climbing to the opposite side in the event of an earthquake (17a) ( As shown in FIGS. 20 and 21, it is possible to suspend 17b) from the front end portions of the first and second face plates (5a) and (5b).

  (W1) is a flexible water-stop sheet made of rubber or synthetic resin, and the first and second face plates (5a) and (5b) and the first and second plate bases (1a) and (1b). The rainwater falling from the joint gap (D) to the bridge gap (S) is sealed by hanging in a U-shaped section, V-shaped section, or corrugated section as an insertion state sandwiched between the upper and lower sides. Stop.

  Such a water-stop sheet (W1) extends along the bridge width direction, and the length (product length) of the first and second plate cradles (1a) and (1b) is the fixed length. Not only the same length as the previous example (about 1000mm and about 1800mm), but also a single piece that covers the length of one lane (for example, about 2750mm, about 3250mm, about 3600mm) and the entire length of one lane In particular, if a single continuous piece extending over the entire length of two lanes or more on one side is employed, there is an advantage that water leakage falling from the joint between the water-stop sheets (W1) can be prevented.

  The fixed length extending along the bridge width direction of the water stop sheet (W1) is equal to the product length of the first and second plate cradles (1a) and (1b), the length of one lane, and the one-side lane. In any case, it is possible to bend freely at one end of the road crossing slope (downstream side) as shown in FIGS. A flexible end cover (18) is internally bonded and integrated (adhered or welded) to form a rainwater dam.

  Then, a water leakage outlet (19) is formed in the bottom surface near the one end to be the dam, and the water leakage is dropped from here into the drainage sheet (W2) described later. However, if the drainage sheet (W2) is not installed at the lower position of the waterstop sheet (W1), connect a leakage discharge hose (not shown) to the bottom surface of the waterstop sheet (W1) in a communicating state, What is necessary is just to discharge | emit the said water leak to the downward direction of the road shoulder side with the discharge hose, and to prevent the water on a road surface. Such an end cover (18) can, of course, be integrally attached to the other end portion where the road crossing gradient increases (upstream side).

  In addition, the water-stop sheet (W1) has a U-shaped cross section, a V-shaped cross section, and a corrugated cross section. It is desirable to fill the elastically deformable filler (20) such as urethane foam, styrofoam, glass wool and the like for preventing damage to the waterproof sheet (W1) due to the peeling pieces of the pavement (A) and other various solids.

  (21a) (21b) is a water-stop sheet that is interposed between the first and second face plates (5a) (5b) and the first and second plate cradles (1a) (1b). W1) A plurality of stud bolt receiving through holes that are distributed at both ends of the rear part, and in conformity with the stud bolt receiving through holes (6a) (6b) on the first and second face plates (5a) (5b) side Then, the stud bolts (4a) (4b) rising from the first and second plate cradle (1a) (1b) side are received.

  Furthermore, in the telescopic device in which the post-concrete concrete damming wall legs (2a) and (2b) having the same height from the first and second plate cradles (1a) and (1b) are continuously suspended from each other. From the middle height position or the lower end of the vertical both-end concrete dam wall legs (2a) and (2b), as shown in FIGS. 22 to 27, a U-shaped section or a V-shaped section made of rubber or synthetic resin is used. A flexible drainage sheet (W2) is integrally suspended to receive water leaking from the waterstop sheet (W1) located at the upper position, and this is one end (the shoulder side of the road) where the road crossing gradient is lowered ) May be determined so as to be discharged downward from the water leakage discharge hose (22) connected in communication with the bottom surface or the like. (23) is a water leakage weir that is integrated and adhered to at least one end (downstream side) of the drainage sheet (W2) in the same manner as the end cover (18) on the water-stop sheet (W1) side. It is an end cover for forming a stop dam, and also has flexibility to bend freely.

  That is, the drainage sheet (W2) is a continuous single piece extending over the entire length of the one-side lane, and the opening upper edge formed in the U-shaped section or V-shaped section is used as the vertical post-cast concrete weir described above. Only a plurality of bolts (25a) and (25b) are pressed against the outer wall surface and inner wall surface of the retaining wall legs (2a) and (2b) with a pair of presser plates (steel plates) (24a and 24b), or The bolts (25a) (25b) and nuts (26a) (26b) are attached and fixed, and the water is discharged downward from the water drainage hose (22) on the road shoulder side using the road crossing gradient.

  Then, due to water leakage from the water-stop sheet (W1), the alkaline component melts from the bridge body (concrete floor slab) (F), becomes free lime, hangs down in a so-called ice column, It is possible to completely prevent salt damage caused by water leakage and rusting of the steel main girder (27) and its steel support (shoe), and the durability of the road bridge can be preserved. .

  Separate drainage sheets of the same material and shape in place of or in addition to the structure in which the drainage sheet (W2) is suspended from the mid-height position and the lower end of both post-cast concrete dam walls (2a) (2b) As shown in FIG. 28, the main body of the bridge (F) (remaining concrete floor slab) in which the box opening space (G) for notched concrete (for expansion and contraction device embedding) is cut, or the upper surface of the abutment and the standing inner wall surface The water leaking from the water stop sheet (W1) attached to the telescopic device (J1) is received and collected at the lower position, and again from the water drainage hose (29) on the shoulder side. You may comprise so that it may discharge | emit. (30a) and (30b) are press plates for the drainage sheet (28) to the bridge body (F) or the abutment, and (31a) and (31b) are a plurality of dry bit anchors (concrete nails) for fixing the plate.

  The drainage sheet (W2) suspended from the post-cast concrete dam wall legs (2a) (2b) of the first and second plate cradles (1a) (1b) in the expansion device (J1), and the expansion device burying box Whether it is in the bridge body (F) in which the extraction space (G) is cut out or the drainage sheet (28) suspended from the abutment, the cross section can be guided to the shoulder side of the leaked U-shaped or V-shaped cross section As shown in FIGS. 29 and 30, so-called bottomless draining pieces (32a), (32b), (33a), and (33b) are leaked from the tip portion that projects one by one to the bridge clearance (S). Further, it is possible to prevent the bridge main body (concrete floor slab) (F) or the standing inner wall surface of the abutment from being transmitted (contacted). Each pair of such draining pieces (32a) (32b) (33a) (33b) may be made not only of a flexible material such as rubber or synthetic resin, but also from a metal material that hardly rusts such as aluminum or stainless steel. it can.

  According to the configuration of the telescopic device (J1) according to the first embodiment of the present invention, a plurality of stud bolts (4a) (1a) projecting upward integrally from the first and second plate cradles (1a) (1b) ( 4b) from above, the stud bolt receiving through hole (21a) (21b) of the water blocking sheet (W1) and the stud bolt receiving through hole (6a) (6b) of the first and second face plates (5a) (5b) The first and second face plates that hold the water-stop sheet (W1) and the top from the upper side by fastening the nuts 7a and 7b to the stud bolts 4a and 4b. (5a) and (5b) can be assembled and integrated stably and firmly on the vast flat surface of the first and second plate holders (1a) and (1b), and the fixing nuts (7a) and (7b) can be removed. Should As a result, each of the water-stop sheet (W1) and the first and second face plates (5a) (5b) is extracted from the stud bolts (4a) (4b) on the first and second plate cradle (1a) (1b) side. Each can be replaced with a new one. Even if the joint clearance (D) is so narrow that a repair work hand cannot be inserted, the water stop sheet (W1) can be quickly replaced and renewed with light labor from above, which is remarkably excellent in workability and repairability.

  In addition, the first and second face plates (5a) and (5b) for supporting the load projecting over a certain length (L1) and (L2) toward the bridge clearance (S) during use of the telescopic device (J1) include: Although it has been explained that a forward-lowering load (bending moment) with the front end portions of the first and second plate cradles (1a) and (1b) as swing fulcrums (P1) and (P2) works, The rear portions of the face plates (5a) and (5b) are a plurality of stud bolts (4a) and (4b) projecting from the first and second plate cradles (1a) and (1b) in a scattered distribution state, and fixing nuts (7a ) (7b) and the screw fastening force can exert a strong counter force without fear of rising (backward rise), and has an effect of obtaining an excellent load resistance and durability. The effect of easily obtaining the supporting strength corresponding to the allowable expansion / contraction amount and the amount of vehicle traffic by changing the increase / decrease of the stud bolts (4a) (4b) or changing the thickness of the first and second face plates (5a) (5b). There is also.

  Further, between the upper and lower sides of the first and second plate cradle (1a) (1b) of the expansion / contraction device (J1) and the first and second face plates (5a) (5b) for supporting the load supported by the first and second plate cradle (1b). A water-stop sheet (W1) made of a flexible material such as rubber or synthetic resin for water-stopping the bridge gap (S) is installed, and the water-stop sheet (W1) is elastic in the form of a sheet during use. Since it functions as a packing or an elastic mat, it can exhibit stable waterproofness and soundproof / vibration resistance over a long period of time.

  When constructing the telescopic device (J1) of the first embodiment in the field, the bridge main bodies (concrete floor slabs) (F) are arranged in an almost L-shaped cross-section across the preliminary bridge play (S). Or a plurality of parallel suspension bars (angle-shaped steel members) passed to the inside of the box opening space (G) for embedding the expansion device cut out on the bridge body (F) and the abutment (for post-cast concrete) Using (B), the vertical post-cast concrete dam wall legs (2a) and (2b) of the first and second plate cradles (1a) and (1b) in the telescopic device (J1) are S) Suspended and inserted and set so as to be in a corresponding positional relationship facing up (facing each other).

  And the embedding extended from the 1st, 2nd plate cradle (1a) (1b) of the expansion-contraction apparatus (J1) and its vertical post-cast concrete dam wall leg (2a) (2b) to each back direction. Stud anchors (3a) (3b), horizontal threading bars (34a) (34b) received and supported thereby, and vertical buried bars already installed in the bridge body (F) or abutment or driven in place thereof After the welded bar anchors (hole-in anchors) (35a) and (35b) are assembled and welded in a vertical and horizontal three-dimensional crossover condition, the post-cast concrete (C) is driven into the box-opening space (G) from above. It is only necessary to embed and integrate the bridge body (F) and the abutment. Thereafter, the surface of the cast concrete (C) can be laid as pavement (A) such as dense asphalt or drainage (high function) asphalt.

  In particular, the substantially horizontal first and second plate cradle (1a) (1b) in the parallel state facing each other at the same level is provided with vertical post-cast concrete dam wall legs (2a) (2b) as shown in FIG. In the field construction of the expansion device (J1) which is not provided, as shown in FIGS. 31 to 33, the post-cast concrete (C) or the pavement (A) constituting the expansion device (J1). First and second plate holders (1a) (1b) having partition wall pieces (10a) (10b), a plurality of embedded stud anchors (steel plates) (3a) (3b) and stud bolts (4a) (4b) ), Of course, the upright pieces (36a) (36b) facing the partition wall pieces (10a) (10b) of the first and second plate holders (1a) (1b) and the first and second plate holders ( 1a) (1b) Temporary first and second angle type steel plates (38a) and (38b) having stud bolt receiving through holes (37a) and (37b), first and second angle type steel plates (38a) and (38b), and the telescopic device ( A plurality of suspension bars (angle-shaped steel) (B) capable of holding the first and second plate cradles (1a) and (1b) of J1) at a stroke are also prepared and work as follows.

  That is, the first and second angle steel plates (38a) (38b) for temporary installation are connected to the stud bolts (4a) (4b) on the first and second plate cradle (1a) (1b) side, which are separately arranged in parallel. The stud bolt receiving through-holes (37a) and (37b) are removably inserted from above and assembled by fastening the temporary fixing nuts (39a) and (39b).

  Then, the substantially horizontal first and second plate cradle (1a) (1b) and the partition wall pieces (10a) (10b) at the rear end and the first and second angle steel plates (38a) (38b). The interior defined by the upright pieces (36a) and (36b) is later stamped into the post-cast concrete (C) as a receiving recess for the first and second face plates (5a) and (5b). Reference numerals (40a) and (40b) denote a plurality of post-cast concrete air vent holes distributed in the first and second plate bases (1a) and (1b).

  And by passing over the bridge main body (concrete floor slab) (F) or the box opening space (G) for embedding the expansion and contraction device of the abutment, the first and second plate holders (1a) (1b) and the first and second plates As shown in FIG. 31, each of the connecting pieces (41a) (41b) is connected to a plurality of suspension bars (B) extending in a parallel state in the bridge axis direction so as to be orthogonal to the angle-shaped steel plates (38a) (38b). The first and second plate cradle (1a) (1b) and the first and second angle type steel plates (38a) (38b) are fixed by using the screw fasteners (42a) (42b), and the suspension bar Hold in the suspended state in the direction of (B).

  Instead of using the connecting pieces (41a) (41b) and screw fasteners (42a) (42b), the first and second plate bases (1a) (1b) and the first and second angle steel plates (38a) ( 38b) may be spot welded directly to the suspension bar (B). Further, the embedding stud anchor (steel plate) (3a) (3b) and the suspension bar (B) are bound by the wires (43a) (43b) so as not to swing and the stud anchor (steel plate) (3a ) A wedge (not shown) may be driven into the lower surface of (3b).

  On the other hand, between the facing plates of the first and second plate cradles (1a) and (1b) and between the bridge play spaces (S), foamed polystyrene and other suitable backup materials (44 ) Is inserted and set into the bridge body (concrete floor slab) (F) and the box-opening space (G) of the abutment from the upper side.

  Then, after the cast concrete (C) is cured, the fixing nuts (39a) and (39b) of the first and second angle-type steel plates (38a) and (38b) for temporary installation are attached to the first and second plate bases (1a) ( 1b) The stud bolts (4a) and (4b) on the side are removed, the backup material (44) is pulled out, and the first and second plate holders (1a) and (1b) are fixedly attached to the suspension bar (B). The first and second angle steel plates (38a) and (38b) are lifted from the box opening space (G) and removed together with the suspension bar (B).

  Then, the first and second plate cradle (1a) (1b) has a substantially L-shaped cross section in which the partition wall pieces (10a) (10b) stand up from the rear end as shown in FIG. Stud bolts (4a) projecting upward from the first and second plate cradles (1a) and (1b) as a result of the opening being cut out as receiving recesses of the first and second face plates (5a) and (5b) As shown in FIG. 33, the water stop sheet (W1) and the first and second face plates (5a) and (5b) of the expansion / contraction device (J1) are removably inserted from above into (4b), and the fixing nut (7a ) (7b) may be fastened.

  In short, the first and second plate cradle (1a) (1b) of the telescopic device (J1) is used as a damming form for post-cast concrete (C), and this is used after curing the post-cast concrete (C). Since it can be maintained in the boxed space (G) as it is as a receiving stand for the first and second face plates (5a) (5b) and the water-stop sheet (W1) without being lifted and removed, Remarkably excellent in properties. Although the construction state is as shown in FIG. 33, the backup material (44) such as the above-mentioned expanded polystyrene may be used in its insertion state without removing it from the bridge gap (S).

  From the rear end portion of the first and second plate cradle (1a) (1b) forming the expansion device (J1), the rear end surface portion of the first and second face plates (5a) (5b) is post-cast concrete (C ) Or the partition wall pieces (10a) (10b) for partitioning from the pavement (A) are integrally projected upward, so that each of the first and second face plates (5a) (5b) and the water stop During repair work to replace the sheet (W1) with a new one, it is not necessary to scoop the existing post-cast concrete (C) or pavement (A), and the studs on the first and second plate cradle (1a) (1b) side The bolts (4a) and (4b) can be repaired easily in a short time in combination with the fact that the fixing nuts (7a) and (7b) fastened to the bolts (4a) and (4b) are exposed to the fully open state. In addition, low temperature (about 5 ℃ or less) Under even in snowfall region that can not be pouring the concrete (C) out the back, it can be freely repair work without constraints.

  The fixing nuts (7a) and (7b) are easily removed due to rusting or breakage at the screw fastening portions between the stud bolts (4a) and (4b) and the fixing nuts (7a) and (7b). If this is not possible, forcibly remove the fixing nuts (7a) and (7b) with a power tool such as a torque wrench, and then cut and remove the old stud bolts (4a) and (4b) that have been damaged. Then, the new stud bolts (4a) (4b) are again welded with screws in a state where they are not piled up again on the surfaces of the first and second plate cradles (1a) (1b) which have been smoothly finished with a tool such as a grinder. As a stud, planting can be integrated. At that time, the position (array) and the number of stud bolts (4a) and (4b) that are scattered are not limited to the same as the old one, but the amount of allowable expansion and contraction, the amount of vehicle traffic, etc. In consideration of the above, it can be newly changed.

  Next, FIG. 34 shows, as a second embodiment of the present invention, a telescopic device (J2) fixed in advance to a steel main girder (27), in which the first and second plate cradle (1a) ( A pair of substantially horizontal base plates (45a) and (45b) projecting integrally from the lower ends of the post-cast concrete weir wall legs (2a) and (2b) in 1b) in the backward direction away from each other, These are attached and fixed to the upper flange (48) of the main girder (27) via the bolts (46a) (46b) and the fastening nuts (47a) (47b). Needless to say, post-cast concrete (C) is placed in the fixed state. Since the other configuration is substantially the same as that of the first embodiment, only the corresponding reference numerals to FIGS. 1 to 33 are written in FIG. 34, and the extension device (J2) according to the second embodiment is described. Detailed description is omitted.

  FIGS. 35 to 37 illustrate a third embodiment of the present invention. One of the first and second plate cradles (1a) and (1b) in the parallel state facing each other at a substantially horizontal equivalent level (in FIG. 35). The telescopic device (J3) mounted on the deck plate (49a) (49b) of the steel floor slab in which the second plate cradle) or both form the bridge body (F) is shown.

  That is, in the expansion / contraction device (J3) shown in FIG. 35, the first plate cradle (1a) is used for post-cast concrete (embedded expansion / contraction device) in the same manner as in the first embodiment. Compared to being embedded in the boxing space (G), the second plate cradle (1b) is placed on the deck plate (49b) which is almost horizontal on the bridge body (steel deck) (F). It is fixedly installed via an adjustment plate (50b) for crossing the road, and is parallel to substantially the same level as the first and second plate cradles (1a) and (1b).

  In the telescopic device (J3) shown in FIG. 37, the first and second plate cradles (1a) (1b) are moved onto the substantially horizontal deck plates (49a) (49b) of the bridge body (steel deck) (F). These are fixedly installed in a parallel state via the road crossing slope adjustment plates (50a) and (50b).

  Further, in any of the telescopic devices (J3) shown in FIGS. 35 and 37, a plurality of stud bolts (51a) (51b) scattered along the bridge width direction from the deck plates (49a) (49b). The stud bolts (51a) and (51b) have through holes (52a), (52b), (53a) and (53b), which are integrally protruded upward, and the gradient adjusting plates (50a) and (50b). The first and second plate bases (1a) and (1b) are formed to correspond to the stud bolts (51a) and (51b) on the deck plates (49a) and (49b) side, respectively, and the gradient adjusting plate (50a). (50b) and the first and second plate holders (1a) and (1b) are sequentially inserted from above so that they can be freely inserted and removed, and the fixing nuts (54a) and (54b) are fastened. To have.

  (55a) (55b) is a sheet made of rubber, synthetic resin or the like that is interposed between the first and second plate holders (1a) (1b) and the gradient adjusting plates (50a) (50b). Shaped elastic packing having the same length as the first and second plate cradle (1a) (1b), and also the stud bolt (51a) (51b) on the deck plate (49a) (49b) side ) Through holes (56a) and (56b) are formed correspondingly and perform various functions such as vibration proofing, sound proofing, and water stopping.

  From the first and second plate cradle (1a) (1b) to the plurality of stud bolts (4a) (4b) integrally projecting upward, the stud bolt through holes (21a) (21b) of the waterproof sheet (W1) from above ) And the stud bolt receiving through holes (6a) and (6b) of the first and second face plates (5a) and (5b) are sequentially inserted and removably inserted, and then the fixing nuts (7a) and (7b) are fastened. About is substantially the same as the expansion-contraction apparatus (J1) of the said 1st Embodiment.

  In that case, stud bolts (51a) (51b) on the deck plate (49a) (49b) side and stud bolt receiving through holes (52a) (52b) (53a) (53b) are dotted along the bridge width direction. The distributed positions, the stud bolts (4a) (4b) on the first and second plate cradle (1a) (1b) side, and the stud bolt receiving through holes (6a) (6b) (21a) (21b) are also bridges. It is preferable to make a difference (phase change) from the positions scattered in the width direction as suggested from FIG.

  In addition, since the other structure in 3rd Embodiment of FIGS. 35-37 is substantially the same as the said 1st Embodiment, only the corresponding code | symbol with FIGS. 1-33 is entered in the FIG. 35-37. Detailed description thereof will be omitted.

  Furthermore, FIG. 38 shows a telescopic device (J4) for sidewalks of a road bridge as a fourth embodiment of the present invention. In this case, either one of the first and second face plates (5a) and (5b) (illustration example) is shown. The first face plate (5a) of the slide top cover (striped steel plate or rubber plate) (57) that becomes an uneven road surface on which pedestrians do not slide, It is made to adhere by the fixing means. And the tip part of the slide top cover (57) is mounted in a state in which it can slide in the bridge axis direction along the remaining second face plate (5b).

  (58) is on the upstream side of the road crossing gradient among the two post-cast concrete weir wall legs (2a) (2b) hanging down integrally from the first and second plate cradles (1a) (1b). On the other hand (in the figure, the first plate cradle side) a plurality of water piped in communication between the post-concrete concrete weir wall leg (2a) and the crushed stone roadbed (59) supporting the sidewalk It is a drain pipe, and the permeated water (underflow water) stagnated in the roadbed work (59) on the sidewalk can be made to flow down and discharged by itself to the bridge play space (S).

  38 is substantially the same as that of the first embodiment described above, and only the corresponding reference numerals are entered in FIGS. Omit.

  Next, FIGS. 39 to 45 show, as a fifth embodiment of the present invention, the first and second plate cradles (1a) and (1b) that are in a parallel state facing each other at substantially the same level, and the bridge clearance (S). Steel plate processed product similar to the first and second face plates (5a) and (5b) between the upper and lower sides of the first and second face plates (5a) and (5b) in a cantilever state protruding forward The first and second face plates (5a) and (5b) are lowered forward by inserting and installing separate first and second filler plates (60a) and (60b) made of steel, cast iron, aluminum alloy casting, and the like. In addition to the pair of the first and second face plates (5a) and (5b) facing each other, only one on one side (unit having a product length) can be replaced with a new one. Indicates (J5) There.

  That is, if the length of the first and second faceplates (5a) and (5b) protruding forward on the bridge clearance (S) is increased, it is necessary to enhance the load supporting force and the counteracting force. First and second filler plates (60a) and (60b) are once mounted on the plate holders (1a) and (1b), and then the first and second faces are continuously placed on the first and second filler plates (60a) and (60b). By mounting the plates (5a) and (5b), while preventing the first and second face plates (5a) and (5b) from being thickly thickened, the load supporting strength is improved and the first The swing fulcrums (P1) and (P2) of the two face plates (5a) and (5b) are not the front end portions of the first and second plate holders (1a) and (1b) as in the first embodiment. 1st and 2nd in front By positioning setting the front end of the I color plate (60a) (60b), it is cause reasonably reduce the opposing force of the load acting on the overhanging front section of the first and second face plate (5a) (5b).

  The flexible waterproof sheet (W1) such as rubber or synthetic resin that stops the bridge gap (S) is divided into the first and second filler plates (60a) (60b) and the first and second plates. The cradle (1a) (1b) is inserted and installed between the upper and lower sides.

  In addition, a plurality of primary stud bolts (4a) (4b) scattered from the first and second plate cradles (1a) (1b) are integrally projected upward, and the primary stud bolts are received. The through holes (61a) (61b) (21a) (21b) are formed corresponding to the first and second filler plates (60a) (60b) and the water-stop sheet (W1), respectively, while the first and second filler plates ( A plurality of secondary stud bolts (62a) and (62b) scattered from 60a) and (60b) are integrally projected upward, and the secondary stud bolt receiving through holes (6a) and (6b) are provided. Openings corresponding to the first and second face plates (5a) and (5b) are provided.

  Moreover, the primary stud bolts (4a) (4b) on the first and second plate cradle (1a) (1b) side and the primary stud bolt receiving through holes (61a) (61b) (21a) (21b), The secondary stud bolts (62a) (62b) on the first and second filler plates (60a) (60b) side and the secondary stud bolt receiving through holes (6a) (6b) are points along the bridge width direction. As shown in FIG. 42, the distribution positions are different (phase change), and water is stopped from above on the primary stud bolts (4a) (4b) on the first and second plate cradle (1a) (1b) side. The sheet (W1) and the first and second filler plates (60a) and (60b) are sequentially inserted and removably inserted, and the primary fixing nuts (63a) and (63b) are respectively fastened. The first and second face plates (5a) and (5b) are removably inserted into the secondary stud bolts (62a) and (62b) on the (60a) and (60b) sides from above, so that secondary fixing nuts (64a) and (64b) are inserted. Are each concluded.

  In such a telescopic device (J5) of the fifth embodiment, at the time of repair work, the waterproof sheet (W1) and the pair of first and second filler plates (60a) from the first and second plate cradles (1a) and (1b). ) (60b) can be removed and replaced with a new one, as well as a pair of first and second face plates (5a) and (5b), one on one side (single unit with product length) ) Alone has the advantage that it can be replaced with a new one.

  In that case, a sheet-like elastic packing such as rubber or synthetic resin between the first and second filler plates (60a) (60b) and the first and second face plates (5a) (5b) mounted on the first and second filler plates (60a) (60b). (65a) and (65b) are inserted and installed, and the elastic packing (65a) and (65b) achieve not only the anti-vibration / sound-proofing effect when passing through the vehicle, but also the water-stopping effect and the road crossing slope adjustment effect. Is preferred. It goes without saying that the receiving through holes (66a) and (66b) of the secondary stud bolts (62a) and (62b) are distributed in both elastic packings (65a and 65b).

  In the telescopic device (J5) of the fifth embodiment, the first and second face plates (5a) (5b) and the first and second plate cradles (1a) (1b) are arranged between the upper and lower sides. Due to the interposition of the filler plates (60a) (60b), the partition wall pieces (10a) (10b) of the first and second plate cradles (1a) (1b) stand up tall and tall. Between the front and rear of the partition wall pieces (10a) and (10b) and the rear end surface portions of the first and second filler plates (60a) and (60b) and the first and second face plates (5a) and (5b), The sealant (13a) (13b) for sealing an object is filled.

  Furthermore, in the expansion / contraction device (J5) of the fifth embodiment, when the allowable expansion / contraction amount is large, the filler (20) in the water-stop sheet (W1) is ruptured during contraction to cause a cavity. The flexible tube (67) for generation is preferably embedded as shown in FIG.

  In addition, since the other structure in 5th Embodiment of FIGS. 39-45 is substantially the same as the said 1st Embodiment, only the corresponding code | symbol with FIGS. 1-33 is entered in the FIG. 39-45. , Omit its detailed description

  FIG. 46 shows a telescopic device (J6) according to a sixth embodiment of the present invention, in which the front end of the first and second face plates (5a) and (5b) projects forward on the bridge gap (S). The plane shape of the surface portion is a linear shape extending substantially parallel along the gap (S) (bridge width direction), and a flexible waterproof sheet that stops the gap (S). (W1) is interposed between the upper and lower surfaces of the first and second face plates (5a) (5b) and the first and second filler plates (60a) (60b). 60a) (60b) and its first and second plate cradles (1a) (1b) are arranged in a sheet-like elastic packing (65a) (65b) between the upper and lower sides. Structurally different from the fifth embodiment shown in FIGS.

  As a result, through holes (68a) and (68b) for receiving primary stud bolts (4a) and (4b) on the first and second plate cradles (1a) and (1b) side are formed in the elastic packings (65a and 65b), respectively. Correspondingly formed, the through holes (21a) (21b) for receiving the secondary stud bolts (62a) (62b) on the first and second filler plates (60a) (60b) side correspond to the waterproof sheet (W1). It is open. Other configurations are substantially the same as those of the first embodiment of FIGS. 1 to 33 in addition to the fifth embodiment of FIGS. 39 to 45, and therefore FIGS. The detailed description of the sixth embodiment will be omitted.

  FIG. 47 shows a telescopic device (J7) according to a seventh embodiment of the present invention. Even in this case, as in the fifth embodiment, the first and second face plates (5a) (5b) and the first, The first and second filler plates (1a) and (1b) are interposed between the first and second filler plates (1a) and (1b). The stud bolts (4a) and (4b) standing integrally upward are tall and the fastening nuts (7a) and (7b) are fastened from above the first and second face plates (5a) and (5b), respectively. .

  That is, the through holes (61a) (61b) (6a) (6b) (21a) (21b) (66a) for receiving the stud bolts (4a) (4b) on the first and second plate cradle (1a) (1b) side. ) (66b) matches the first and second filler plates (60a) and (60b), the first and second face plates (5a) and (5b), the waterproof sheet (W1), and the elastic packing (65a and 65b). The openings are distributed as the positional relationship of communication, and the phase change between the primary stud bolt (4a) (4b) side and the secondary stud bolt (62a) (62b) side as shown in the fifth and sixth embodiments. It is not provided in the state.

  In that case, in FIG. 47, the water-stop sheet (W1) is inserted and installed between the first and second filler plates (60a) (60b) and the first and second plate holders (1a) (1b), Sheet-like elastic packing (65a) (65b) is interposed between the upper and lower sides of the first and second filler plates (60a) (60b) and the first and second face plates (5a) (5b). However, the projecting front end surfaces of the first and second face plates (5a) and (5b) and the first and second filler plates (60a) and (60b) have a bridge gap (S) (bridge width direction) as in the sixth embodiment. As long as it forms a linear shape extending substantially in parallel in plan view, the water-stop sheet (W1) is connected to the first and second face plates (5a) (5b) and the first and second filler plates (60a). (60b) up and down Also, the elastic packing (65a) (65b) is inserted between the first and second filler plates (60a) (60b) and the first and second plate holders (1a) (1b). It can be installed.

  The remaining configuration of the seventh embodiment is substantially the same as that of the first embodiment, in addition to the fifth embodiment, so that FIG. 47 corresponds to FIGS. 39 to 45 and FIGS. The detailed explanation is omitted.

(1a) (1b)-1st and 2nd plate cradle (2a) (2b)-Post-cast concrete dam wall leg (3a) (3b)-Stud anchor for embedding (5a) (5b)-1st, 2nd Face plate (6a) (6b) ・ Stud bolt receiving through hole (7a) (7b) ・ Fixing nut (8a) (8b) ・ Nut recessed groove (9a) (9b) ・ Sealant (10a) (10b) ・ Partition Wall piece (11a) (11b), screw fastener (12a) (12b), backing support rib (13a) (13b), sealant (14a) (14b), rough surface (15a) (15b), rubber coating (16) ・ Rib anchor (guide plate)
(17a) (17b) ・ Climbing prevention piece (18) ・ End cover (19) ・ Water leakage outlet (20) ・ Filling material (21a) (21b) ・ Stud bolt receiving through hole (22) ・ Water leakage drain hose (23 End cover (24a) (24b) (30a) (30b) Presser plate (25a) (25b) Bolt (26a) (26b) Nut (27) Main girder (28) Drainage sheet (29)・ Water leakage drain hose (31a) (31b) ・ Dry bit anchor (32a) (32b) (33a) (33b) ・ Draining piece (34a) (34b) ・ Through bar (35a) (35b) ・ Incision anchor (embedded) muscle)
(36a) (36b) Standing piece (37a) (37b) (52a) (52b) (53a) (53b) (56a) (56b) Stud bolt receiving through hole (38a) (38b) Angle type steel plate ( 39a) (39b) ・ Temporary locking nut (40a) (40b) ・ Air vent hole (41a) (41b) ・ Connection piece (42a) (42b) ・ Screw fastener (43a) (43b) ・ Wire (44) ・Pack-up material (45a) (45b), base plate (46a) (46b), bolt (47a) (47b), nut (48), upper flange (49a) (49b), deck plate (50a) (50b), slope Adjustment plate (51a) (51b) Stud bolt (54a) (54b) Fixing nut (55a) (55b) (65a) (65b) Elasticity Kicking (57) · Slide top cover (58) · Drain pipe (59) · Roadbed work (60a) (60b) · First and second filler plates (61a) (61b) (68a) (68b) · Primary studs Bolt receiving through hole (62a) (62b) (66a) (66b) · Secondary stud bolt receiving through hole (63a) (63b) (64a) (64b) · Fixing nut (67) · Flexible tube (A) · Pavement (B), suspension bar (C), post-cast concrete (D), joint play (F), bridge body (G), unboxed space (J1) (J2) (J3) (J4) (J5) (J6) (J7) ・ Extension device (S) ・ Bridge play (seam)
(P1) (P2) • Swing fulcrum (α) • Crossing angle (β) • Inclination angle (W1) • Water stop sheet (W2) • Drainage sheet (L1) (L2) • Overhang length

Claims (24)

A telescopic device for a bridge constructed so as to straddle a gap between bridge bodies or between a bridge body and an abutment,
First and second plate cradles attached to and fixed to the bridge body or abutment in a parallel state facing each other at an almost horizontal equivalent level;
First and second face plates for load support that are respectively mounted on the first and second plate cradles, as cantilevered states that project forward a certain length forward on the gap,
In order to partition the rear end surface portion of the first and second face plates from post-cast concrete or pavement, partition wall pieces that stand integrally upward from the first and second plate cradles,
A flexible waterproof sheet that stops the gap between the first and second face plates and the first and second plate cradles by being installed between the upper and lower sides,
A plurality of stud bolts scattered respectively along the width direction of the bridge from the first and second plate cradles are integrally projected upward, while the stud bolt receiving through holes are formed as the first and second face plates. And corresponding to each water stop sheet,
The water stop sheet and the first and second face plates are detachably inserted into the stud bolts on the first and second plate cradle side from above, and the fixing nuts are respectively fastened, thereby extending the first and second face plates. A bridge expansion and contraction device characterized by being able to exert a resistance force to a load acting on a front end side. Adjusting the road crossing gradient between one or both of the first and second plate cradles on which the first and second face plates are mounted and the substantially horizontal deck plate of the steel deck forming the bridge body While installing each plate,
A plurality of stud bolts scattered and distributed along the bridge width direction from the deck plate of the steel floor slab are integrally projected upward, while the stud bolt receiving through holes are formed in the adjustment plate and the plate cradle. Forming each corresponding,
2. The bridge expansion and contraction device according to claim 1, wherein the adjustment plate and the plate receiving base are inserted into the stud bolt on the deck plate side from above so as to be freely inserted and removed, and the fixing nuts are respectively fastened.   3. The bridge for a bridge according to claim 2, wherein a sheet-like elastic packing is interposed between one or both of the first and second plate cradles and the upper and lower sides of the road transverse slope adjusting plate. Telescopic device. A telescopic device for a bridge constructed so as to straddle a gap between bridge bodies or between a bridge body and an abutment,
First and second plate cradles attached to and fixed to the bridge body or abutment in a parallel state facing each other at an almost horizontal equivalent level;
First and second filler plates respectively mounted on the first and second plate cradle;
As a cantilever state projecting a certain length forward to the gap, the load supporting first and second face plates respectively mounted on the first and second filler plates;
In order to separate the rear end surface portion of the first and second face plates and the rear end surface portion of the first and second filler plates from the post-cast concrete or / and the pavement, the first and second plate cradles are integrally and upwardly respectively. A partition wall piece standing up;
A flexible water-stop sheet that stops water between the first and second filler plates and the first and second plate cradles by being installed between the upper and lower sides,
A plurality of primary stud bolts scattered from the first and second plate bases along the bridge width direction are integrally projected upward, and the primary stud bolt receiving through holes are formed in the first through-holes. While forming corresponding to 2 filler plate and water stop sheet respectively,
As a relationship in which a plurality of secondary stud bolts are scattered along the bridge width direction from the first and second filler plates, and are scattered at different positions from the primary stud bolts on the first and second plate cradle sides. While projecting upward integrally, the secondary stud bolt receiving through hole is formed corresponding to each of the first and second face plates,
The water stop sheet and the first and second filler plates are detachably inserted from above into the primary stud bolts on the first and second plate cradle sides, and after fastening the fixing nuts, the first and second filler plate sides The first and second face plates are inserted into the secondary stud bolts from above so that they can be freely inserted and removed, and the fixing nuts are respectively fastened to counteract the load acting on the front end of the first and second face plates. A bridge expansion and contraction device characterized in that it can be demonstrated. A telescopic device for a bridge constructed so as to straddle a gap between bridge bodies or between a bridge body and an abutment,
First and second plate cradles attached to and fixed to the bridge body or abutment in a parallel state facing each other at an almost horizontal equivalent level;
First and second filler plates respectively mounted on the first and second plate cradle;
As a cantilever state projecting a certain length forward to the gap, the load supporting first and second face plates respectively mounted on the first and second filler plates;
In order to separate the rear end surface portion of the first and second face plates and the rear end surface portion of the first and second filler plates from the post-cast concrete or / and the pavement, the first and second plate cradles are integrally and upwardly respectively. A partition wall piece standing up;
By being installed between the upper and lower sides of the first and second face plates and the first and second filler plates, a flexible water-stop sheet that stops the gap is provided.
A plurality of primary stud bolts scattered from the first and second plate bases along the bridge width direction are integrally projected upward, and the primary stud bolt receiving through holes are formed in the first through-holes. While corresponding to each of the two filler plates,
As a relationship in which a plurality of secondary stud bolts are scattered along the bridge width direction from the first and second filler plates, and are scattered at different positions from the primary stud bolts on the first and second plate cradle sides. While projecting upward integrally, the secondary stud bolt receiving through hole is formed corresponding to each of the first and second face plates and the water stop sheet,
The first and second filler plates are inserted into the primary stud bolts on the first and second plate cradles from above and detachably inserted from the upper side. After fastening nuts, the secondary studs on the first and second filler plates are tightened. By inserting the water-stop sheet and the first and second face plates into the bolts from above and removably inserting them, and fastening the fixing nuts respectively, the counteracting force of the load acting on the projecting front end side of the first and second face plates can be reduced. A bridge expansion and contraction device characterized in that it can be demonstrated. A telescopic device for a bridge constructed so as to straddle a gap between bridge bodies or between a bridge body and an abutment,
First and second plate cradles attached to and fixed to the bridge body or abutment in a parallel state facing each other at an almost horizontal equivalent level;
First and second filler plates respectively mounted on the first and second plate cradle;
As a cantilever state projecting a certain length forward to the gap, the load supporting first and second face plates respectively mounted on the first and second filler plates;
In order to separate the rear end surface portion of the first and second face plates and the rear end surface portion of the first and second filler plates from the post-cast concrete or / and the pavement, the first and second plate cradles are integrally and upwardly respectively. A partition wall piece standing up;
Inserted between the first and second filler plates and the first and second plate cradles or between the first and second face plates and the first and second filler plates. With a flexible water-stop sheet that stops the gap between the play,
A plurality of stud bolts scattered respectively along the bridge width direction from the first and second plate bases are integrally projected upward, while the stud bolt receiving through holes are formed in the first and second filler plates. And corresponding to each of the first and second face plates and water-stop sheet,
By inserting the water stop sheet, the first and second filler plates, and the first and second face plates from above into the stud bolts on the first and second plate cradle side so as to be freely detachable and fastening the fixing nuts, 1. A telescopic device for a bridge characterized in that it is defined so as to be able to exert a counteracting force of a load acting on the front end side of the projecting front face of the face plate. While hanging the post-cast concrete dam wall leg integrally from either one or both of the first and second plate cradle,
A plurality of embedding stud anchors made of deformed bar steel or steel plate are integrally extended and extended in a rearward direction from the first and second plate cradle and / or post-cast concrete dam wall legs. The expansion / contraction device for bridges according to 1, 4, 5 or 6.   A wave shape, a sawtooth shape, a comb shape, or substantially a front end surface portion of each of the first and second face plates extending from the first and second plate bases to the gap is correspondingly bent and extended in a plan view along the gap. The expansion / contraction device for bridges according to claim 1, wherein the expansion / contraction device is shaped into a linear shape extending in parallel.   6. A plurality of stud bolts integrally projecting upward from the first and second plate cradles are distributed in a row or a row arranged along the bridge width direction. Or the expansion-contraction apparatus for bridges of 6.   Between the rear end surface portion of the first and second face plates and the partition wall pieces of the first and second plate holders, or the rear end surface portions of the first and second face plates and the first and second filler plates and the The expansion and contraction device for a bridge according to claim 1, 4, 5 or 6, wherein a sealant for sealing rainwater or solid matter is filled between the front and rear of the partition wall pieces of the first and second plate holders. .   The expansion and contraction device for a bridge according to claim 1, 4, 5 or 6, wherein a rubber coating for anticorrosion and antislip is vulcanized and bonded to the surfaces of the first and second face plates.   The expansion and contraction device for a bridge according to claim 1, 4, 5, or 6, wherein the surfaces of the first and second face plates are roughened to prevent slipping.   Open the stud bolt receiving through hole of the 1st and 2nd faceplate in a stepped form with its upper end part being a recessed recessed groove of the fixing nut, and fill the recessed groove with a sealant for sealing rainwater or solid matter The bridge expansion and contraction device according to claim 1, 4, 5, or 6. The waterproof sheet is suspended from the first and second plate holders in a U-shaped cross section or V-shaped cross section, the product length of the first and second plate holders, the length of one lane, or the whole of two or more lanes on one side Extend along the bridge width direction by the length,
At least one end cover of the water stop sheet has a low road crossing slope, and an end cover that can be freely bent is attached and integrated,
The expansion and contraction for a bridge according to claim 1, 4, 5, 5 or 6, wherein a water leakage outlet is formed on a bottom surface near the one end portion blocked by the end cover, or a water leakage discharge hose is connected in communication. apparatus. While forming a waterproof sheet as a flexible sheet such as rubber or synthetic resin, it is formed into a U-shaped section, V-shaped section or corrugated section hanging from the first and second plate cradles,
7. An elastically deformable filler such as urethane foam, styrofoam, glass wool or the like for preventing breakage of the water-stop sheet due to intrusion of various solid materials into the bent interior. The expansion device for bridges as described. While suspending the post-cast concrete dam wall legs from the first and second plate cradles,
The flexible drainage sheet with a U-shaped section or a V-shaped section suspended from the middle height position or the lower end of both post-cast concrete dam wall legs makes water leaking from the waterstop sheet low in road crossing gradient. The expansion / contraction device for a bridge according to claim 1, 4, 5 or 6, characterized in that it is defined so as to be discharged downward from a water leakage discharge hose communicated with one end. While suspending the post-cast concrete dam wall legs from the first and second plate cradles,
The pair of draining pieces attached to and fixed to the lower ends of both post-cast concrete weir wall stop walls isolates the water leaking from the water stop sheet so as not to be transmitted to the standing inner wall surface. The expansion / contraction device for bridges according to 1, 4, 5 or 6.   7. The climbing prevention piece to the other side facing the other side at the time of an earthquake is integrally suspended from the front end portion where each of the first and second face plates protrudes above the gap. Telescopic device for bridges.   Between the top and bottom of the first and second filler plates and the first and second face plates mounted thereon, or between the top and bottom of the first and second plate holders and the first and second filler plates mounted thereon The bridge expansion and contraction device according to claim 4, wherein a sheet-like elastic packing is inserted and installed.   The partition wall pieces of the first and second plate cradles are bent and integrated continuously from the rear ends of the first and second plate cradles, or are attached and fixed as separate metal plates in a vertical state or an inclined state. The expansion / contraction device for bridges according to claim 1, 4, 5, or 6.   The expansion and contraction for bridges according to claim 1, 4, 5, or 6, wherein rib anchors for preventing pavement flow are integrally extended in a rearward direction from the partition wall pieces of the first and second plate holders. apparatus.   7. The partition wall pieces of the first and second plate cradles are extended into a wave shape bent in a plan view and other zigzag shapes along the bridge width direction. Telescopic device for bridges.   The base end portion of the slide top cover serving as a walking road surface is integrally attached to one of the first and second face plates, and the tip end portion of the slide top cover is along the other remaining of the first and second face plates. The bridge telescopic device according to claim 1, wherein the bridge telescopic device is mounted so as to be slidable. In constructing the bridge extension device according to claim 1,
A plurality of studs are distributed in a dotted manner along the width of the bridge. First and second plate cradles, in which the bolts are integrally protruded upward, and a plurality of embedded stud anchors are integrally extended in the rear direction away from each other,
First and second angle type steel plates for temporary installation having upright pieces facing the partition wall pieces of the first and second plate holders and stud bolt receiving through holes of the first and second plate holders;
Prepare a plurality of suspension bars that hold the first and second plate cradle and the first and second angle-shaped steel plates at a time,
Assemble by inserting the first and second angle-shaped steel plates from above into the stud bolts on the first and second plate cradle side so that they can be freely inserted and removed, and tightening each of the temporary fixing nuts,
A plurality of suspension bars extending in the direction of the bridge axis perpendicular to the first and second plate cradle and the first and second angle steel plates are parallel to the boxed space for post-cast concrete for the bridge body or the abutment. As you pass,
While holding the first and second plate cradle and the first and second angle-type steel plates in a suspended state that crawls to the suspension bar by fixing means such as screw fasteners and spot welding,
After inserting and setting up a backup material such as styrofoam which becomes the weir wall of post-cast concrete into the play space, the post-cast concrete is placed from above into the boxed space of the bridge body or abutment,
Then, after curing the cast concrete, remove the fixing nut from the stud bolt on the first and second plate cradle side, remove the backup material, and unlock the fixed state of the first and second plate cradle with respect to the suspension bar, By removing the first and second angle-shaped steel plates together with the suspension bars, the water-stopping sheet and the second steel plate are placed from above onto the stud bolts of the first and second plate cradles remaining in the punching recesses of the cast concrete. 1. A construction method for a bridge expansion and contraction device, wherein 1 and 2 face plates are removably inserted and fastening nuts are fastened.

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