JP2008121190A - Load bearing-type expansion device of highway bridge - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To prevent a contraction crack in the curing/hardening of post-cast concrete from being produced on the road surface of a highway bridge. <P>SOLUTION: This expansion device of the highway bridge is equipped with a pair of opposed rising face plates (11) which are formed in a meandering shape in a plan view, in which a bottomless recess (11x) and a bottomed protrusion (11y) are alternately provided. Base ends (11x-R) of the adjacent bottomless recesses (11x) of the respective rising face plates (11) are connected and integrated together by a partition wall plate (20) which is linearly exposed on a road surface, so that the contraction crack (C) of the post-cast concrete (17) for embedding and integrating the expansion device in the blockout recess (G) of the road bridge can be inhibited from being produced on the road surface on the basis of the meandering shape. Thus, the bottomed protrusion (11y) of each of the rising face plates (11) and the blockout recess (G) communicating with the rear of the bottomed protrusion (11y) are shut off from each other. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a load-supporting expansion / contraction device for a road bridge, and is devised to improve durability and reliability by suppressing the occurrence of shrinkage cracks in the concrete afterwards, particularly on the road surface.

  On the bottom of the bridge, the gap between the facing face plates made of steel plate meanders into a continuous wave shape in plan view on the gap (seam) of the road bridge, and alternately protrudes from the gap shape with a bottomless recess. Load-supported expansion and contraction of road bridges that are to be buried in the boxed recess by placing post-cast concrete in the boxed recess of the slab and abutment communicating with the convex part As the apparatus, for example, as described in Japanese Patent Publication No. 51-49503 and Japanese Patent Application Laid-Open No. 2000-144614, it is already known.

According to this type of expansion / contraction device, the mutual gap between the two standing face plates is a continuous wave shape in plan view, and the boundary between the bottomless concave portion and the bottomed convex portion is the bridge axis or the transverse line thereof. Since the tire surface of a passing vehicle straddles and touches the ground, and the tire surface absorbs the gap, there is an uncomfortable feeling of riding based on sudden vibration and impact. There is an advantage that noise generation can be suppressed.
Japanese Patent Publication No. 51-49503 JP 2000-144614 A

  However, in the configuration of the expansion and contraction device, as shown in FIGS. 51 to 53, the opposing gaps (D) of the two standing face plates (1) face each other alternately with bottomless concave portions (1x) and bottomed convex portions (1y). A wave-shaped bottomed convex portion (1y) that projects in a continuous wave shape in a plan view and projects above the gap (S), and a boxed recess in the abutment and floor slab (2) that communicates behind it ( Since the post-cast concrete (3) is to be placed at the construction site to G), the post-cast concrete (3) with the base end (1x-R) of the bottomless recess (1x) as a source is particularly generated. Shrinkage cracks (C) then occur unpredictably on the road surface of the cast concrete (3) during curing, and the spillover reduces the durability and reliability.

  In other words, post-cast concrete (3) needs moisture during solidification, but its abutment and floor slab (2) have a large capacity for boxing recess (G). The opening length (L1) from the boundary line (perpendicular to the bridge axis) (XX) to the paved asphalt (4) to the base end (1x-R) of the bottomless recess (1x) having the above-mentioned wave shape ), The opening length (L2) from the boundary line (XX) to the tip (1y-F) of the bottomed convex portion (1y) is also different and changed.

  Also, the opening width (1y) of each bottomed convex portion (1y) having a wave shape in plan view, compared to the opening width (road width) (W1) of the box-shaped recess (G) forming a rectangular shape in plan view ( W2) is remarkably narrow and varies, and the placement capacity of post-cast concrete (3) for each bottomed convex portion (1y) is very small.

  Therefore, the predetermined blending ratio of cement and water in post-cast concrete (3), and the occupation ratio of water to cement, especially between the boxed recess (G) and each bottomed convex part (1y), Combined with the difference in the surface area that receives the temperature conditions of the outside air during the curing, it fluctuates by itself and scrambles moisture during solidification, and the base of each bottomless recess (1x) that forms the scrambled boundary Shrinkage cracks (C) of post-cast concrete (3) due to water shortage occur on the road surface from the corner (1x-R) corner toward the paved asphalt (4). In addition, the shrinkage crack (C) penetrates deeply from the road surface with time and spreads so as to branch off, leading to a decrease in durability and reliability as an expansion device.

  Such a phenomenon is not limited to the corrugated expansion and contraction device shown in FIGS. 51 to 53, and the boundary portion (1z) between the alternately bottomless concave portion (1x) and the bottomed convex portion (1y) This also occurs in a comb-shaped expansion / contraction device (so-called finger joint) that forms a plane parallel to the bridge axis for the same reason.

  The present invention aims to improve such a problem, and in order to achieve the object, in claim 1, a wave shape or sawtooth shape in a plan view in which a bottomless concave portion and a bottomed convex portion of an upright plate surface are alternately arranged. A pair of face-up standing faceplates in the form of combs and other continuous meanders,

  An elastic sealing material filled in the almost parallel meandering gaps of both standing face plates;

  Similarly, with a plurality of distribution anchors that are integrally extended and extended in the rearward direction opposite to each other as an array distribution state at required intervals from the standing plate surfaces of both standing face plates,

  Both standing faceplates are placed between concrete floor slabs of a road bridge or in a boxed recess that is notched in the floor slab and abutment. After inserting and setting

  Load-supported expansion and contraction of the road bridge that is embedded in the boxed recess by post-cast concrete that is cast from above into the boxed recess that communicates with the bottomed convex part of both standing face plates. In the device

  Each standing by a continuous single partition wall plate or a plurality of separate partition wall plates that will be exposed on the road surface as a straight line extending substantially parallel to the boundary line between the boxed recess and the paved asphalt. By connecting and integrating the base ends of adjacent bottomless recesses in the face plate,

  By blocking the bottomed convex part of each standing face plate and the boxed recess communicating behind it, the shrinkage crack of post-cast concrete that occurs on the road surface based on the meandering shape of each standing face plate is suppressed. It is characterized by that.

  Further, in claim 2, the base ends of the adjacent bottomless recesses in each standing face plate are connected and integrated by one row of partition wall plates extending only to the upper position,

  It is characterized in that the bottomed convex portion of each standing face plate and the box-shaped concave portion communicating with the back thereof are partially blocked by a certain depth from the road surface to approaching the uppermost distribution anchor.

  In claim 3, the base ends of adjacent bottomless recesses in each standing face plate are connected and integrated by two substantially parallel partition wall plates extending to the upper position and the lower position,

  On the other hand, the bottomed convex part of each standing face plate and the boxed concave part communicating behind it are partially blocked by a certain depth from the road surface to the uppermost distribution anchor by the upper partition wall plate. The lower partition wall plate is partially blocked by a certain height from the bottom surface of the boxing recess to the lowermost distribution anchor.

  Further, in claim 4, the base ends of the adjacent bottomless recesses in each standing face plate are connected and integrated by a partition wall plate extending as a constant height substantially the same as each standing face plate,

  It is characterized in that the bottomed convex portion of each standing face plate and the boxing recess communicated behind it are totally blocked from the road surface to the bottom surface of the boxing recess.

  According to the said structure of Claim 1, the bottomed convex part of each standing face plate which exhibits the narrow convex shape of the surface area exposed to the temperature conditions of the outside air during the curing of the post-cast concrete, and a simple rectangular shape having the same wide surface area The boxed recess is blocked by a certain depth from the road surface through a partition wall plate that is exposed to the road surface as a straight line extending almost parallel to the boundary line between the boxed recess and the paved asphalt. Therefore, due to the peculiarity of the standing face plate having a continuous meandering shape in plan view, it is possible to reliably suppress shrinkage cracks generated on the road surface during solidification of the cast concrete afterwards. This has the effect of improving the durability and reliability of the seed load support type expansion and contraction device.

  Such an effect can be achieved by the configurations of claims 2 to 4 as well. However, if the configurations of claims 3 and 4 are employed, the partition wall plate effectively deforms the standing face plate. In addition to preventing the noise, the partition wall plate can be attached to the bottom of the boxing recess by using the lower end, and a separate elastic waterproof belt can be attached, or the interior of the elastic waterproof belt can be further soundproofed. Can be filled with dual-purpose water-stopping material, combined with elastic sealant filled in the almost parallel meandering gaps of both standing faceplates, it is a water-stopping and soundproofing state that overlaps the gap between road bridges There is an effect that can be sealed.

  In particular, according to the construction of claim 4, a plurality of reinforcing distribution anchors instead of the distribution anchors of the standing face plate are totally shielded from the bottomed convex part and the box opening recess of the standing face plate. From the partition wall plate, it can be extended and extended under a free left and right interval pitch to the box opening recess, placing various fillers on the bottomed convex part and inserting load supporting pieces Combined with the installation, it can exhibit excellent load-bearing strength, and it is remarkably effective as a telescopic device with a large amount of expansion and contraction and for a long bridge.

  Hereinafter, the specific configuration of the present invention will be described in detail with reference to the drawings. First, FIGS. 1 to 9 show a first embodiment of a load supporting expansion / contraction device according to the present invention, and (G) shows a road bridge. A box for embedding expansion and contraction devices cut into the concrete slabs (10) of the road bridge or between the floor slabs (10) and the abutment as a substantially L-shaped side view across the play (seam) (S) It is a punched recess and has an average depth of about 120 to 250 mm.

  (11) is a pair of steel plate upright face plates facing each other and having a height (h) substantially corresponding to the depth of the above-mentioned box opening recess (G), and has a bottomless recess (11x) on the upright plate surface. The bottom convex portion (11y) is bent and formed in a meandering shape in a plan view alternately from a single steel plate, and the base end (11x-R) of the bottomless concave portion (11x) is the above-mentioned box-shaped concave portion. While projecting from the bottom surface (12) of (G), the bottomed convex portion (11y) projects forward to the play space (S) in a state where it communicates with the unboxing recess (G). It will be. (13) is a bottom plate of the bottomed convex portion (11y), and is welded in an upwardly inclined state.

  Furthermore, as a continuous meandering shape in a plan view, the boundary portion (11z) between the bottomless concave portion (11x) and the bottomed convex portion (11y) is either a bridge axis or a crossing line in a road bridge. Alternating smooth wave shapes in an approximately U shape as shown in FIGS. 5, 16, and 30, which exhibit inclined surfaces that are not orthogonal, and alternating square wave shapes in an approximately trapezoidal shape as shown in FIGS. 46, or a substantially saw-tooth shape with a substantially letter shape, and a boundary portion (11z) between the bottomless concave portion (11x) and the bottomed convex portion (11y) is connected to the bridge axis. An alternating comb shape having a substantially U shape as shown in FIGS. 36 to 40 forming parallel planes may be used.

  In any case, the substantially parallel meandering gap (D) of both standing faceplates (11) facing each other is filled with an elastic sealing material (14) such as rubber or sponge, thereby causing the meandering gap (D). Including rainwater entering the road, falling earth and sand from worn vehicles, worn pieces of tires, and stripped pieces of paved asphalt (15) are captured so that these various obstacles do not fall from the gap (S) on the road bridge. It has become.

  (16) from the base end (11x-R) of the bottomless recess (11x) and the tip (11y-F) of the bottomed projection (11y) forming the upright plate surfaces of the both standing face plates (11). These are distribution anchors that are integrally extended and extended in the opposite backward direction as a plurality of upper and lower steps, and are arranged in parallel while maintaining a constant left-right mutual pitch.

  And a pair of such standing face plates (11) are substantially parallel to each other by the use of a suspension bar (not shown) spanned to the inside of the boxing recess (G) at the construction site. After the meandering gap (D) is inserted and set as the corresponding positional relationship facing the gap (S) of the road bridge, the bottomed convex part (11y) and the boxed concave part (G) communicating behind it are When the post-cast concrete (17) is placed from above, it is embedded and integrated into the inside of the boxed recess (G).

  In addition, (18) is a plurality of through bars for assembly work that are laid in a crossing manner with the above-mentioned distribution anchor (16), and (19) is also preliminarily installed on the concrete floor slab (10) or abutment. Although it is a U-shaped embedded muscle, an incisor anchor (not shown) may be used instead of this when repairing the telescopic device.

  Then, as the distribution anchor (16) of the standing face plate (11) that bites and integrates with the cast concrete (17), the base end (11x-R) of the bottomless recess (11x) and the bottom are shown in FIGS. Although the reinforcing bar stud-welded to the tip (11y-F) of the convex part (11y) is shown, a screw rod or a steel plate (flat bar) may be adopted instead of the reinforcing bar, and the arrangement made of a steel plate in particular. When the force anchor (16) is employed, the bottomed convex portion (11y) is moved to the boundary inclined surface between the bottomed convex portion (11y) and the bottomless concave portion (11x) as shown in FIG. Lap welding can also be performed from the inside. Further, the steel plate may be stud welded to only one of the standing face plates (11) as a guide plate for a snowplow in a cold region.

  Furthermore, (20) is to the upper position of the base end (11x-R) in order to connect and integrate the base ends (11x-R) of the adjacent bottomless recesses (11x) in each standing face plate (11). It is a partition wall plate welded in one row, and is almost parallel to the boundary line (XX) between the boxed recess (G) and the paving asphalt (15) as shown in FIGS. It is exposed on the road surface of post-cast concrete (17) as a straight line extending to

  Moreover, the partition wall plate (20) is a steel plate (flat bar) having a certain band width, and a bottomed convex portion (11y) of each standing face plate (11) and a boxed recess (G) ) Is partially blocked from the road surface by a certain depth (d1) until it approaches the uppermost distribution anchor (16).

  Furthermore, the constant depth (d1) from the road surface is that of the post-placed concrete (17) in the uppermost power distribution anchor (16) and the through-bars (18) for assembly work mounted in the crossing state with this. A dimension that substantially corresponds to the fogging margin is, for example, about 30 to 40 mm.

  In other words, even the uppermost distribution anchor (16) does not interfere with the partition wall plate (20), and the bottomed convex portion (11y) and the bottomless concave portion ( 11x) and projecting and extending in the rearward direction through the lower gap (O1) of the partition wall plate (20).

  In other words, each standing face plate (11) includes the problems of the prior art described based on FIGS. 51 to 53 as a special characteristic that forms a continuous meandering shape in plan view. Each bottomed convex part (11y) that protrudes on the play (S) as a convex shape with a small surface area exposed to the temperature conditions of the outside air during curing, and a boxed recess (G) that also has a simple rectangular shape with a large surface area ) Is blocked by a certain depth (d1) from the road surface by the partition wall plate (20).

  Therefore, at the base end (11x-R) of each bottomless recess (11x) that forms the boundary between each bottomed convex portion (11y) and the box opening recess (G) whose plane shape and size are different, Moisture competing action of the solidified post-cast concrete (17) hardly occurs, and the occupation ratio of water to the cement is kept uniform for each bottomed convex part (11y) and boxed concave part (G). The shrinkage crack (C) of the post-cast concrete (17) from the corner of the base end (11x-R) of the bottomless recess (11x) toward the paving asphalt (15) as shown in FIGS. It is possible to prevent the standing face plate (11) from being deformed by the partition wall plate (20), and to improve the durability and reliability of this type of load-supporting expansion and contraction device. Effect A.

  In such a case, in FIGS. 1 to 7, a long continuous single piece in which the base ends (11x-R) of adjacent bottomless recesses (11x) in each standing face plate (11) are welded to their upper positions. The partition wall plate (20) is connected and integrated. However, as long as the above-mentioned purpose can be achieved, as shown in FIGS. 8 and 9 corresponding to FIGS. 5 and 6, the partition wall plate (20) made of a plurality of short steel plates is used. The inside of each bottomed convex part (11y) is fitted with the base end (11x-R) of the bottomless concave part (11x) and welded, so that the boxed concave part (G) and the paved asphalt are also obtained. You may extend as a straight line substantially parallel to the boundary line (XX) with (15).

  In addition, both standing face plates (11) are provided with a fixed unit length (for example, about 1,000 to 1,800 mm), and a plurality of adjacent ones are connected to each other at a connection angle (welded to the end portion). Needless to say, they are added and integrated in a serial state along the crossing line of the road bridge via 21) and screw fasteners (not shown).

  Next, FIGS. 10 to 13 show a second embodiment of the present invention, in which the base ends (11x-R) of adjacent bottomless recesses (11x) in each standing face plate (11) are connected and integrated. Therefore, the steel plate of the first embodiment welded to the upper stage position of the base end (11x-R) is also used as the upper partition wall plate (20), and is also distinct from the lower stage position of the base end (11x-R). The lower partition wall plate (22) made of a steel plate having a constant band width is welded in a total of two rows extending substantially parallel to the upper partition wall plate (20). The lower partition wall plate (22) may be the same steel plate or flat iron as the upper partition wall plate (22).

  And by the upper partition wall plate (20), as in the first embodiment, the bottomed convex portion (11y) of each standing face plate (11) and the boxed recess (G) communicated behind it, While being partially blocked by a certain depth (d1) from the road surface to approaching the uppermost distribution anchor (16), the bottom partition wall plate (22) has a bottom surface (12 ) To a lower part of the distribution anchor (16) until reaching the lowermost distribution anchor (16).

  In that case, the distribution anchor (16) of each standing face plate (11) is from the base end (11x-R) of the bottomless recess (11x) and the tip (11y-F) of the bottomed projection (11y), Through the mutual gap (O2) between the upper partition wall plate (20) and the lower partition wall plate (22), it can be extended and extended in the rearward direction as in the first embodiment.

  Since the other configurations in the second embodiment are substantially the same as those in the first embodiment, they are driven into the bottomed convex portion (11y) and the boxed recess (G) of each standing face plate (11). Further, the upper partition wall plate (20) can also prevent the shrinkage crack (C) of the post-cast concrete (17) from occurring on the road surface during curing and solidification, and the lower partition wall plate (22). ) Can increase the strength of each of the standing face plates (11) and can stabilize the vertical construction state with respect to the bottom surface (12) of the boxed recess (G).

  In addition, it replaces with a steel plate (flat bar) as said partition wall plate (20) (22) of 1st, 2nd embodiment, and the angle type | mold steel material provided with the processus | protrusion (23) used as the dowel of post-cast concrete (17). If the angle type steel material of the upper partition wall plate (20) is used in an inverted L shape as shown in FIG. 4, there is an advantage that it can be spot-welded with the suspension bar.

  14 to 16 show a third embodiment of the present invention, in which the base ends (11x-R) of adjacent bottomless recesses (11x) in each standing face plate (11) are connected and integrated. Therefore, the partition wall plate (24) made of a steel plate having a constant width that is substantially the same as the height (h) of each of the standing face plates (11) is brought into close contact with the base end (11x-R). Welding.

  By such a partition wall plate (24), the bottomed convex part (11y) of each standing face plate (11) and the boxing recess (G) communicating with the rear thereof are connected to the boxing recess (G ) Until the bottom surface (12) is reached, and unlike the configurations of the first and second embodiments, the post-cast concrete (17) has its bottomed convex portions (11y) and a box. It is designed to be placed separately into the punched recess (G).

  As a result, not only the partition wall plate (24) can reliably prevent shrinkage cracks (C) during solidification of the post-cast concrete (17) from appearing on the road surface, but also each standing face. The durability of the plate (11) and the stability of the vertical construction state with respect to the bottom surface (12) of the unboxing recess (G) will be further improved.

  About the distribution anchor (16) of each standing face plate (11) in 3rd Embodiment, the escape hole (25) for distribution anchors corresponding to this is located in the middle height position of the said partition wall plate (24). It is only necessary to project and extend from the front end (11y-F) of the bottomed convex portion (11y) to the rear direction through the escape hole (25).

  Moreover, about the partition wall plate (24) of 3rd Embodiment, the row | line | column or several processus | protrusion (23) used as the gibber of post-cast concrete (17) to a midway height position, and several communication port (26) It is desirable to provide

  The other configurations in the second and third embodiments are substantially the same as those in the first embodiment, including the configurations shown in FIGS. 8 and 9, so that FIGS. 10 to 16 correspond to FIGS. The detailed description is omitted only by entering the reference numerals.

  In any of the first to third embodiments, the bottomed convex portion (11y) of each standing face plate (11) projecting forward to the gap (S) of the road bridge, and the box opening communicating behind it. When the partition wall plates (20), (22), and (24) with the recess (G) are viewed from above, the box opening recess ( G) extends substantially parallel to the boundary line (XX) between the asphalt (15) and the paved asphalt (15). Therefore, instead of or in addition to the distribution anchor (16) of each standing face plate (11), A plurality of separate reinforcing force distribution anchors (27) can also be extended and extended integrally in the rear direction. As the reinforcing power distribution anchor (27) protruding from the partition wall plates (20), (22), and (24), as with the power distribution anchor (16), reinforcing bars, screw rods, steel plates ( Needless to say, a guide plate for a snowplow in a cold region can be used.

  Then, in view of the relationship between the plurality of force distribution anchors (16) protruding from the standing face plates (11) and the meandering shape in which the bottomless concave portions (11x) and the bottomed convex portions (11y) alternate. Contrary to the restriction that the pitch between the adjacent left and right sides is constant, the reinforcing power distribution anchor (27) is not subject to such restriction, and its partition wall plate (by welding at the production factory or construction site) 20), (22), and (24) can be freely extended and extended, and there is an advantage that the embedding fixing force to the boxing recess (G) can be enhanced.

  In that case, a reinforcing bar or a screw rod is adopted as the reinforcing power distribution anchor (27) of the partition wall plates (20), (22) and (24), and this is used as the partition wall plate (20) ( 22) Insert and remove from the plurality of reinforcing distribution anchor insertion holes (28) having openings formed in a scattered distribution state at required intervals in (24) into the bottomed convex portions (11y) of the standing face plates (11). The partition wall plates (20), (22) (22) (22) (22) (20) (22) () are inserted freely, and the screw shaft portion (27a) carved in the reinforcing power distribution anchor (27) is fixed by the fixing nut (29). If it is detachably attached to 24), there is an advantage that the expansion and contraction device of the present invention can be transported to the construction site in a compact and compact state in which this is preliminarily extracted.

  In particular, in the configuration of the third embodiment, the bottomed convex portion (11y) of each standing face plate (11) and the boxed concave portion (G) behind the whole are arranged through the partition wall plate (24). The reinforcing power distribution anchor (27) instead of the power distribution anchor (16) of each standing face plate (11) is integrally extended and extended from the partition wall plate (24). This is also useful for reducing the size and compactness of the transport.

  In addition, as shown in FIG. 16 as well, a load supporting piece (30) of a separate steel plate is provided between the front end (11y-F) of the bottomed convex portion (11y) and the partition wall plate (24). ) May be finely partitioned into the left and right halves to improve the load bearing strength. However, such a configuration can be adopted not only in the third embodiment, but also in the first and second embodiments, and is effective when the meandering pitch between adjacent left and right sides (so-called wavelength) is large. .

  Further, in the configurations of the second and third embodiments, the partition wall plate (22) (between the bottomed convex portion (11y) of each standing face plate (11) and the boxed recess (G) communicated behind the raised convex plate (11y) 24) is in the lower position of each standing face plate (11) and hangs down to the bottom surface (12) of the unboxing recess (G), so that the partition wall plate (22) as shown in FIG. ) An elastic water-stop belt (32) which is formed into a pre-curved receiving hook shape by using the vertical front or rear surface of the lower end in (24) and a separate presser plate (31) from the front or rear surface. Can be fixed through a plurality of substantially horizontal screw fasteners (33).

  Then, the substantially parallel meandering gap (D) of both standing face plates (11) facing each other is shielded from below by the elastic water stop belt (32), so the elastic seal interposed in the meandering gap (D). Together with the material (14), there is an effect that the gap (S) between the road bridges can be sealed in a superimposed water stop state.

  As a method of attaching the elastic water stop belt (32) to the lower end portions of the partition wall plates (22) and (24), as shown in FIGS. 18 and 11 to 13 and 15 corresponding to FIG. The water stop belt support stay (34) substantially parallel to the bottom plate (13) of the bottomed convex portion (11y) of the plate (11) is directed forward from the lower end portion of the partition wall plate (11) to the play (S). The upper end of the catch-type elastic water stop belt (32) is sandwiched between the upper and lower portions of the bottom plate (13) and the water stop belt support stay (34). It may be fixed by a plurality of screw fasteners (35). As the water stop belt support stay (34) for that purpose, as shown in FIG. 19, a separate angle-shaped steel material may be fixed to the lower end of the partition wall plates (22) and (24) by welding or screw fasteners. .

  Further, the lower end portion of the partition wall plates (22) and (24), which are suspended from the bottom surface (12) of the boxing recess (G), faces the play (S) of the road bridge as shown in FIG. The concrete floor slab (10) or the corner chipping prevention cover (36) of the abutment is continuously suspended deeper than the bottom surface (12) of the box opening recess (G), and the corner chipping prevention cover (36) The upper and lower ends of the elastic water stop belt (32) are sandwiched between the substantially vertical front surface or rear surface and a separate presser plate (37), and are fixed via a plurality of substantially horizontal screw fasteners (38). May be.

  Furthermore, the vertical position of the embedding gantry (M) in which the lower end portions of the partition wall plates (22) and (24) in the second and third embodiments are installed in the boxing recesses (G) as shown in FIGS. In order to be used as the front leg piece (39), it is continuously suspended as it is, and the front leg piece (39), a substantially parallel rear leg piece (40) facing the front leg piece (39), and a plurality of substantially intervening parts between these front and rear parts From the horizontal partition connecting member (41a) or the plurality of vertical partition connecting members (41b), the frame (M) is integrated into a framework in a lattice form in a plan view in which the post-cast concrete (17) is freely distributed.

  A plurality of scattered and distributed bars, such as reinforcing bars and screw rods, which will be the stud anchors for assembly work (42) are integrally erected from the upper surface of the gantry (M) by a certain height, while the partition wall The upper ends of the receiving hook-shaped elastic water-stop belt (32) are also attached to the front leg piece (39) of the gantry (M) that is continuous with the plates (22) and (24) via a presser plate (43) that is separate from this. It can also be clamped and fixed by a plurality of substantially horizontal screw fasteners (44).

  In that case, the stud anchors (42) standing up from the gantry (M) are the distribution anchors (16) of the standing face plates (11) and / or the reinforcing distribution anchors of the partition wall plates (22) (24) ( 27), welding is performed at each crossing point through the assembly reinforcing bar (18) which is laid across the crossing state. The upper end of the stud anchor (42) may be bent as a hook for hooking the line (18).

  Then, when the telescopic device inserted and set in the unboxing recess (G) by the suspension bar (not shown) is detached from the suspension bar and separated, the bottomless recesses (11) in both standing face plates (11) 11x) as the base end (11x-R), which can be said to be a swinging fulcrum, it is possible to reliably prevent the possibility of falling into the forward sloping state to the gap (S). In addition to obtaining effective high load-bearing strength, the depth of scraping of post-cast concrete (17) at the time of repairing is not excessively removed by the frame (M) embedded in the boxed recess (G). It can also be regulated to a certain level, and there is an effect that can prevent the concrete floor slab (10) and the abutment from being weakened.

  In any case, the elastic waterproof belt (32) is dimensioned to a certain unit length (about 3 to 4 mm) substantially corresponding to one lane of a road bridge as shown in FIGS. It is preferable to seal the seam in a partially laminated state by laminating separate elastic waterproof pads (45).

  The above-described repair work of the standing face plate (11) having a certain unit length is carried out in units of one lane in order to prevent traffic congestion, so that the elastic waterproof belt (32) of the partition wall plates (22) (24) is used. ) Is set so as to project from the end of the standing face plate (11) in advance, so that it is lifted once and the elastic water-stop pad ( 45) can be pasted together, and the repair can be performed conveniently at the construction site.

  In addition, based on FIGS. 17-20 and FIGS. 21-25, after pinching the upper both ends of an elastic water-stop belt (32), it fixes with a screw fastener (33) (35) (38) (44). As described above, the upper ends of the upper part are either pasted with an adhesive or vulcanized, or the other end of the remaining upper part is also pasted with an adhesive or vulcanized. It is also worth adopting a method in which only the screw fasteners (33) (35) (38) (44) are detachably fixed.

  If the inside of the elastic waterstop belt (32) formed in the shape of the receiving bowl is filled with a sponge or other soundproofing waterstop material (46), the elastic seal material (14) and the elastic waterstop belt are used. In addition to the synergistic water stop effect with (32), there is an advantage that a soundproof effect of vehicle passing sound emitted as noise from the gap (S) of the road bridge can be obtained.

  Similarly, the lower ends of the partition wall plates (22) and (24) in the second and third embodiments are attached to the vertical legs of the L-shaped mounting plate (A) with respect to the steel main girder (47) as shown in FIGS. As the piece (48), the main plate dropout prevention piece (49) for the substantially horizontal concrete floor slab, which is also continuously suspended and remains on the mounting plate (A), is attached to the main plate by a plurality of vertical screw fasteners (50). It is desirable to fix to the upper flange of the spar (47).

  Then, even if there is a crack in the remaining concrete floor slab (10) due to repeated repair work by scraping off the post-cast concrete (17), the floor slab (10) falls off. This has the effect of preventing fear. In addition, according to the structure of FIG. 17, 20 to the vertical leg piece (48) of such an attachment plate (A), the said elastic water stop belt is carried out by a separate pressing plate (31) and a screw fastener (33). It is also conceivable that (32) is sandwiched and fixed.

  First, as each standing face plate (11) of a certain unit length, a wave shape in a plan view in which bottomless concave portions (11x) and bottomed convex portions (11y) are alternately formed from the continuous single steel plate, The configuration bent into a serrated shape, a comb shape, and other meandering shapes has been described. For this purpose, a large sheet metal press machine and the bottom plate (13) of the bottomed convex portion (11y) are supported. A machine that cuts into a flat shape and its welder are required, and the above-mentioned bottomless concave portion (11x) and bottomed convex portion (11y) alternately meander left and right interval pitch (so-called wavelength) and the amount of expansion and contraction is different. It is difficult to cope with the production of various telescopic devices that have changed.

  Therefore, in order to improve such a problem, it is preferable that the standing face plate (11) is assembled and produced from the following plurality of plate segments in any of the first to third embodiments. .

  That is, in the case of producing each standing face plate (11) in a wave shape in a plan view, the bottomless concave portion (11x) and the bottomed convex portion (11y) are formed in a plan view as shown in FIGS. A plurality of plate segments (11p) folded in a substantially Z shape, a substantially S shape, and / or a substantially L shape are welded in an added state and assembled into a continuous wave shape.

  When each standing face plate (11) is produced as a comb shape in plan view, the bottomless concave portion (11x) and the bottomed convex portion (11y) are substantially L-shaped in plan view as shown in FIG. Alternatively, a plurality of plate segments (11p) bent in a substantially Z shape may be assembled into a continuous comb shape by welding them in an added state.

  Similarly, in producing each standing face plate (11) in the shape of a comb in plan view, the bottomed convex portion (11y) of each standing face plate (11) is replaced with the method shown in FIG. 35 as shown in FIG. One plate segment (11p) is folded into a substantially U-shape in plan view, or from two separate plate segments (11p-1) and (11p-2) as shown in FIG. In any case, the substantially U-shaped plate segments (11p), (11p-1), and (11p-2) are separated from the bases at both ends to the partition wall plates (20), (22), and (24), respectively. By welding in the abutting state, the bottomed convex portions (11y) are partitioned into rectangular shapes in plan view.

  Then, the bottomed convex part (11y) which makes the rectangle, and the relative substantially reverse U-shaped bottomless concave part (11x) which escapes this rectangular plane alternate as shown in FIG. An upright face plate (11) assembled into an overall comb-like shape can be obtained.

  In that case, a special thick wall is formed as shown in FIG. 38 from the single plate segment (11p) into the bottomed convex portion (11y) folded in a substantially U shape in plan view, according to the configuration of FIG. The load supporting piece (30) is welded in a subdivided state, and the bottomed convex portion (11y) is formed into a substantially U shape in plan view from two separate plate segments (11p-1) (11p-2). When welding, either one of them is bent into a substantially L-shape in plan view as a thin first plate segment (11p-1) as shown in FIG. 39, and the remaining one is a thicker straight second plate segment. (11p-2) may be assembled. According to this, the thick second plate segment (11p-2) of the bottomed convex portion (11y) is provided with an effective load supporting function of the passing vehicle. Can do.

  Further, in FIGS. 37 to 39, the substantially U-shaped plate segments (11p), (11p-1), and (11p-2) are separated from the bases at both ends against the partition wall plates (20), (22), and (24), respectively. The bottomed convex portion (11y) is sectioned into a rectangular shape in plan view, and the bottomed convex portion (11y) of each standing face plate (11) is flat as shown in FIG. From the thin first plate segment (11p-1) bent into a substantially L shape as viewed and the straight second plate segment (11p-2) as thicker than the first plate segment (11p-2), welded into a substantially U shape in plan view At the same time, only the separation base end portion of the first plate segment (11p-1) is welded to the partition wall plates (20), (22), and (24) in abutting state, while the remaining second plate segments (11p-2) is used as a distribution anchor (16) of each standing face plate (11), and the lower gap (O1) of the partition wall plate (20) in the first embodiment, or the second embodiment. The upper partition wall plate (20) and the lower partition wall plate (22) may be extended and extended to the boxed recess (G) behind the upper partition wall plate (22).

  In this respect, the partition wall plate (24) of the third embodiment totally blocks the bottomed convex portion (11y) of each standing face plate (11) and the boxed recess (G) behind it. Therefore, as shown in FIGS. 41 and 42, the distribution anchor (16) composed of the thick straight second plate segment (11p-2) is rearwardly divided into the partition wall plate (24) as shown in FIG. The crossover part in the parting-off state is welded and integrated.

  In the comb-shaped standing face plate (11) assembled in this way, the distribution anchor (16) composed of the thick straight second plate segment (11p-2) is connected to the box-shaped recess (G). The tip portion projecting rearward is preferably a low-cut through-strand seat (16r), and a plurality of through-struts for assembly (18) can be placed in a crossed state in an orderly and stable manner. On the other hand, the base end portion of the thick second plate segment (11p-2) projecting forward from the partition wall plate (24) functions as a load supporting piece (16f) of the bottomed convex portion (11y). Therefore, it is remarkably effective particularly as an extension device having a large extension / contraction amount or that for a long-span bridge.

  Further, by assembling from two separate plate segments (11p-1) and (11p-2), the bottomed convex portion (11y) of each standing faceplate (11) partitioned into a rectangular shape in plan view, As an extension device for a sloping bridge instead of the extension device for a straight bridge, it may be divided into a parallelogram in plan view corresponding to the skew angle (θ) as shown in FIG. It can carry out according to the said method of FIGS.

  And it can be said that the standing face plate (11) of such a telescopic device for a sloping bridge has a comb shape in plan view, and a boundary portion between the bottomed convex portion (11y) and the bottomless concave portion (11x). There is no change in that (11z) forms a plane parallel to the bridge axis.

  Therefore, as shown in the schematic plan view of FIG. 44, when the neutral line (NN) of the solid line is set at the standard temperature, when the temperature changes in winter and summer, and expands and contracts like a virtual line, The long sides of the parallelogram that defines the bottom convex portion (11y) move forward and backward in parallel with the bridge axis, and the left and right sides of the bottomed convex portions (11y) in both standing face plates (11) There is no risk of generating a large gap between the motorcycles where the motorcycle is removed.

  In comparison, the boundary portion (11z) between the bottomed convex portion (11y) and the bottomless concave portion (11x) of the standing face plate (11) crosses the bridge axis as shown in the schematic plan view of FIG. In the corrugated shape having the inclined surface, when the temperature is changed from the neutral line (N-N) due to a temperature change, the left and right portions of the bottomed convex portions (11y) in both standing face plates (11) gradually increase. As a result, the motorcycle passing through the widened gap (E) may be removed, and this is also true for the saw-toothed standing face plate (11).

  In particular, when the assembling method of FIGS. 36 to 39 and FIGS. 41 and 42 is applied to the bottomed convex portion (11y) of each standing face plate (11) having the configuration of the third embodiment, its partition Resin concrete or non-reacted concrete with a finer particle size than post-cast concrete (17) into the bottomed convex part (11y) that is totally blocked from the boxed recess (G) through the wall plate (24). It is preferable to place shrinkage mortar, cement mortar, and other various fillers (51).

  Then, since the filler (51) also contributes to the improvement of the load bearing strength, it is remarkably useful as an expansion device having a large expansion / contraction amount or that for a long-span bridge. However, depending on the size of the bottomed convex portion (11y), the same post-cast concrete (17) as the boxed concave portion (G) can be filled therein.

  In that case, from the 1st plate segment (11p-1) or / and 2nd plate segment (11p-2) which divides and forms the bottomed convex part (11y) of each standing face plate (11), the said filling ( 51) and protrusions (52) that serve as gibbles for the post-cast concrete (17) are preferably projected inwardly to give up the biting force.

  Each standing face plate (11) can also be produced as a saw-tooth shape in plan view, in which case the bottomed convex portion (11y) is formed as a single plate segment (11p as shown in FIGS. 28, 46 and 47). ) From the two plate segments (11p-1) and (11p-2) as shown in FIG. 48, or from the two separate plate segments (11p-1) and (11p-2) as shown in FIG. Weld to.

  In any case, the substantially double-shaped or substantially letter-shaped plate segments (11p), (11p-1), and (11p-2) are separated from the bases at both ends to the partition wall plates (20), (22), and (24), respectively. By welding in the abutting state, the bottomed convex portions (11y) are partitioned into triangles in plan view.

  Then, the bottomed convex part (11y) which makes the triangle, and the non-bottom concave part (11x) of the relative substantially reverse square shape or the almost reverse letter shape that escapes the triangle are shown in FIG. Thus, an upright face plate (11) assembled in an overall saw-tooth shape in plan view that alternates as shown in FIG.

  In this case, as shown in FIGS. 46 and 48, a separate load support is provided in the bottomed convex portion (11y) bent or welded in a substantially square shape in plan view according to the above configuration of FIGS. A thick distribution anchor (16) that bisects the piece (30) into the left and right halves or equally bisects from the tip (11y-F) of the bottomed projection (11y) to the left and right. As shown in FIG. 47, the partition wall plates (20), (22), and (24) may be stretched and extended integrally in the rearward direction so as to be split and integrated, and the crossing portions in the split and split state may be integrated by welding. .

  Further, in FIGS. 47 and 48, the bases of the both ends of the substantially rectangular or substantially letter-shaped plate segments (11p) (11p-1) (11p-2) are transferred to the partition wall plates (20), (22) and (24). Each of the bottomed convex portions (11y) is sectioned into a triangular shape in plan view by welding to the abutting state, and the bottomed convex portions (11y) of the standing face plates (11) are shown in FIG. As shown in FIG. 50, a thin straight first plate segment (11p-1) and a thicker second plate segment (11p-2) are welded into a substantially square shape or a substantially letter shape in plan view. At the same time, only the separation base end portion of the first plate segment (11p-1) is welded to the partition wall plates (20), (22), and (24) while being abutted against each other, while the remaining second plate segments (11p-2) is used as a distribution anchor (16) of each standing face plate (11), and the lower gap (O1) of the partition wall plate (20) in the first embodiment, or the second embodiment. In this case, the upper partition wall plate (20) and the lower partition wall plate (22) may be extended and extended to the unboxing recess (G) behind the upper partition wall plate (22).

  Even in the sawtooth-shaped standing faceplate (11) assembled in this way, the distribution anchor (16) composed of the thick second plate segment (11p-2) is directed backward to the unboxing recess (G). The leading end protruding to the bottom is used as a receiving base (16r) for a through bar that is also notched low, and a plurality of through bars (18) for assembly work can be stably mounted on the flat surface in a crossed state. In addition, a base end portion of the same thick second plate segment (11p-2) projecting forward from the partition wall plates (20) (22) to the play gap (S) is formed on the bottomed convex portion (11y). There exists an effect which can be made to function as a load support piece (16f).

  Also, in the sawtooth-shaped standing face plate (11), the bottomed convex portion (11y) and the box-shaped recess (G) are divided into the partition wall plate, similarly to the comb-shaped one explained based on FIGS. (24) applied to the third embodiment, which is totally cut off through the structure, and the post-cast concrete (17) and the aggregate grain size into the triangular bottomed convex portion (11y). Various fillings (51) can be placed.

  In this case as well, from the plate segments (11p) (11p-1) (11p-2) that define the bottomed convex portions (11y) of the standing face plates (11), the filling (51) and the rear It is preferable to project the protrusion (52) which becomes the bevel of the cast concrete (17) inwardly and integrally.

It is a slope view of the construction state which shows 1st Embodiment of this invention. FIG. 2 is an enlarged plan view of FIG. 1. FIG. 3 is an enlarged sectional view taken along line 3-3 in FIG. 2. It is sectional drawing corresponding to FIG. 3 which shows the partition wall plate of an angle type steel material. FIG. 5 is a perspective view showing a smooth wave-shaped standing face plate and a long partition wall plate that is circumscribed on the standing face plate. FIG. 5 is a perspective view showing an upright face plate having an angular wave shape and a distribution anchor protruding from the same. It is a perspective view which shows the reinforcement distribution anchor of the screw rod attached to the partition wall plate. It is a perspective view which shows the short partition wall plate of the state fitted to the standing face plate. It is a perspective view which shows the power distribution anchor of the steel plate which protrudes from a standing face plate. It is sectional drawing corresponding to FIG. 3 which shows 2nd Embodiment of this invention. It is an enlarged slope figure which extracted the standing face plate of FIG. It is a perspective view which shows the construction state of FIG. FIG. 12 is a perspective view corresponding to FIG. 11 showing the short partition wall plate in a state of being fitted to the standing face plate. It is sectional drawing corresponding to FIG. 3, 10 which shows 3rd Embodiment of this invention. FIG. 15 is an enlarged slope view obtained by extracting the standing face plate of FIG. 14. It is a perspective view which shows the partition wall plate attached to the smooth face-shaped standing face plate in the circumscribing state, and the reinforcement distribution anchor which protrudes from this. It is sectional drawing of the state which attached the elastic water stop belt to the partition wall plate of the said 2nd Embodiment. It is sectional drawing corresponding to FIG. 17 which shows another attachment state of an elastic water stop belt. It is sectional drawing of the state which attached the elastic water stop belt to the partition wall plate of the said 3rd Embodiment. It is sectional drawing of the state which attached the elastic water stop belt to the corner chipping prevention cover for floor slabs hanging from the partition wall plate of the said 2nd Embodiment. It is a perspective view which shows the expansion joint embedding mount installed in the inside of a boxing recess. It is sectional drawing of the state which attached the elastic water stop belt to the mount frame of FIG. It is sectional drawing corresponding to FIG. 22 which shows the front end bending state of the stud anchor standing up from a mount. It is a perspective view corresponding to FIG. 21 which shows the deformation | transformation embodiment of the said mounting stand. It is sectional drawing of the state which attached the elastic water stop belt to the mount frame of FIG. It is sectional drawing which shows the bonding state of the elastic water stop pad with respect to the joint line of an elastic water stop belt. It is an expanded sectional view which follows the 27-27 line | wire of FIG. It is a top view which shows the sawtooth-shaped standing face plate and the long partition wall plate of the attachment state circumscribed to this. It is an expanded sectional view which follows the 29-29 line | wire of FIG. FIG. 6 is a perspective view showing a smooth wave-shaped standing face plate welded in an added state from a plurality of plate segments. FIG. 31 is a schematic plan view showing an added state different from FIG. 30. FIG. 5 is a perspective view showing an angular wave-shaped standing face plate welded in an added state from a plurality of plate segments. It is a perspective view corresponding to FIG. 32 which shows the standing face plate with which the short partition wall plate was fitted. FIG. 33 is a schematic plan view of FIG. 32. It is a plane schematic diagram which shows the comb-shaped standing face plate welded in the addition state from the several plate segment. FIG. 36 is a perspective view showing the finished state of FIG. 35. FIG. 6 is a perspective view showing a comb-shaped standing face plate assembled from two separate plate segments. It is a perspective view which shows the comb-shaped standing faceplate by which the separate load support piece was welded in the bottomed convex part. It is a perspective view which shows the comb-shaped standing face plate assembled from two plate segments with different thicknesses. FIG. 6 is a perspective view showing a comb shape in which a thick plate segment extends and extends backward from a partition wall plate as a distribution anchor of a standing face plate. It is a slope view of the construction state which mounted the comb-shaped standing face plate corresponding to FIG. 40 to the mounting stand. It is an expanded sectional view of FIG. It is a slope view which shows the expansion joint for inclined bridges which consists of a comb-shaped standing face plate. FIG. 44 is a schematic plan view showing the expansion / contraction action of FIG. 43. It is a plane schematic diagram which shows the expansion-contraction action of the expansion joint for inclined bridges which consists of a standing face plate of a wave shape or a sawtooth shape. It is a perspective view which shows the assembly state of a sawtooth-shaped standing face plate and a partition wall plate. FIG. 5 is a perspective view showing a sawtooth shape in which a power distribution anchor of a standing face plate is projected backward from a partition wall plate. It is a perspective view which shows the sawtooth-shaped standing face plate welded by the abutting state from the several plate segment. FIG. 6 is a perspective view showing a sawtooth shape in which a thick plate segment is extended from a partition wall plate in the backward direction as a distribution anchor of a standing face plate. It is a perspective view which shows the sawtooth shape of the assembly state different from FIG. It is a perspective view corresponding to FIG. 1 which shows the conventional expansion-contraction apparatus. FIG. 52 is an enlarged plan view of FIG. 51. FIG. 53 is an enlarged sectional view taken along the line 53-53 in FIG. 52.

Explanation of symbols

(10) Concrete floor slab (11) Standing face plate (11x) Bottomless recess (11y) Bottom convex part (11z) Boundary part (11y-F) Tip of bottom convex part (11x- R)-Base end of bottomless recess (11p) (11p-1) (11p-2)-Plate segment (12)-Bottom surface of boxing recess (13)-Bottom plate (14)-Elastic sealing material (15 ) ・ Pavement asphalt (16) ・ Distribution anchor (16f) ・ Load bearing piece (16r) ・ Reception seat (17) ・ Post-cast concrete (18) ・ Through reinforcement (19) ・ Embedded or reinforced reinforcement anchor (20) (22) (24)-Partition wall plate (21)-Connection angle (23)-Protrusion (givel)
(25) ・ Release hole for distribution anchor (26) ・ Communication port (Giber)
(27)-Reinforcement distribution anchor (28)-Reinforcement distribution anchor insertion hole (29)-Fixing nut (30)-Load support piece (31) (37) (43)-Presser plate (32)-Elastic stop Water belt (33) (35) (38) (44) (50), screw fastener (34), water stop belt support stay (36), corner chipping prevention cover (39), front leg piece (40), rear leg Piece (41a) (41b) ·· Partition connecting material (42) · Stud anchor (45) · Elastic water stop pad (46) · Soundproofing water stop material (47) · Main girder (48) · Leg piece (49)・ Falling prevention piece (51) ・ Filling material (52) ・ Protrusion (givel)
(A) ・ Mounting plate (C) ・ Shrinkage crack of post-cast concrete (D) ・ Meandering gap (G) ・ Recessed box (M) ・ Stand (S) ・ Gap (seam)
(XX) ・ Boundary line (d1) ・ Constant depth (d2) ・ Constant height (h) ・ Tall height (O1) ・ Down gap (O2) ・ Upper and lower mutual gap (θ) ・ Skew angle of inclined bridge

Claims (25)

A pair of steel plate standing faces facing each other in the form of a wavy shape, sawtooth shape, comb shape, or other continuous meandering shape in which the bottomless concave portion (11x) and the bottomed convex portion (11y) of the standing plate surface alternate. A plate (11);
An elastic sealing material (14) filled in the substantially parallel meandering gap (D) of the two standing face plates (11) facing each other;
Similarly, a plurality of force distribution anchors (16) extended integrally extending in the rearward direction opposite to each other as an array distribution state at required intervals from the standing plate surfaces of both standing face plates (11),
Both standing faceplates (11) meander between the concrete floor slabs (10) of the road bridge or into the slabs (G) that are notched in the floor slabs (10) and the abutments, facing each other in parallel. After inserting and setting the gap (D) as the corresponding positional relationship facing the gap (S) of the road bridge,
The boxed recesses are formed by the post-cast concrete (17) cast from above into the boxed recesses (G) communicating with the bottomed convex portions (11y) of both standing face plates (11) and the rear thereof. (G) In a load-supporting expansion / contraction device for a road bridge embedded and integrated in
A continuous single-partition partition wall plate that appears on the road surface as a straight line extending substantially parallel to the boundary line (XX) between the boxed recess (G) and the paved asphalt (15) ( 20) (22) (24) or a plurality of separate partition wall plates (20) (22) (24), the base end (11x-R) of the adjacent bottomless recess (11x) in each standing faceplate (11) )
The road surface based on the meandering shape of each standing face plate (11) by blocking the bottomed convex part (11y) of each standing face plate (11) and the box opening recess (G) communicating therewith. A load-supporting expansion / contraction device for a road bridge, characterized in that shrinkage cracks (C) of post-cast concrete (17) occurring in the road are suppressed. The base ends (11x-R) of adjacent bottomless recesses (11x) in each standing face plate (11) are connected and integrated by one row of partition wall plates (20) extending only to the upper stage position,
Constant depth until the bottomed convex part (11y) of each standing face plate (11) and the boxed concave part (G) communicating therewith approach the uppermost distribution anchor (16) from the road surface 2. The load support type expansion / contraction device for a road bridge according to claim 1, wherein only (d1) is partially blocked. Two substantially parallel partition wall plates (20) extending from the base end (11x-R) of adjacent bottomless recesses (11x) in each standing face plate (11) to the upper and lower positions thereof ( 22)
The bottomed convex part (11y) of each standing face plate (11) and the boxed concave part (G) communicating with the rear thereof are connected to the uppermost distribution anchor (16) from the road surface by the upper partition wall plate (20). While being partially blocked by a certain depth (d1) until approaching the bottom, the lower partition wall plate (22) from the bottom surface (12) of the boxing recess (G) to the bottommost distribution anchor (16) The load-supporting telescopic device for a road bridge according to claim 1, wherein the device is partially blocked by a certain height (d2) until it approaches. A partition wall in which the base ends (11x-R) of adjacent bottomless recesses (11x) in each standing face plate (11) extend as the same constant height (h) as each standing face plate (11) Connected and integrated with the plate (24),
From the road surface to the bottom surface (12) of the unboxing recess (G), the bottomed convex portion (11y) of each standing face plate (11) and the unboxing recess (G) communicating therewith are 2. The load-supporting telescopic device for a road bridge according to claim 1, wherein the device is totally blocked. Inside the bottomed convex portion (11y) of each standing face plate (11) blocked from the box opening recess (G) by the partition wall plates (20), (22), (24),
A load supporting piece (30) welded between the front and rear of the tip (11y-F) of the bottomed convex portion (11y) and the partition wall plates (20) (22) (24), or The partition wall plates (20), (22), and (24) are cut off from the tip (11y-F) of the convex portion (11y) so that the partition wall plates (20), (22), and (24) are divided into pieces by the power distribution anchor (16) that extends and extends in the rearward direction. The load-supporting type expansion / contraction device for a road bridge according to claim 1, 2, 3 or 4, characterized by being divided.   A plurality of force distribution anchors (16) and separate reinforcing force distribution anchors (27) of each standing face plate (11) are integrally extended from the partition wall plates (20), (22), and (24) in the rearward direction. 5. A load-supporting telescopic device for a road bridge according to claim 1, 2, 3 or 4. A plurality of reinforcing force distribution anchors (27) made of separate reinforcing bars or screw rods are arranged on the partition wall plates (20), (22), and (24) at required intervals. From the plurality of reinforcing distribution anchor insertion holes (28) correspondingly formed as the scattered distribution state of each of the standing face plate (11) and detachably inserted into the bottomed convex portion (11y),
The screw shaft portion (27a) engraved in each reinforcing distribution anchor (27) is detachably attached to the partition wall plates (20), (22), and (24) by a fixing nut (29). 5. A load-supporting telescopic device for a road bridge according to claim 1, 2, 3 or 4.   A plate segment (11p) in which the bottomless concave portion (11x) and the bottomed convex portion (11y) of each standing face plate (11) are bent into a substantially Z shape, a substantially S shape, and / or a substantially L shape in plan view. 5. The road bridge load-supporting type expansion and contraction device according to claim 1, wherein the road bridge is assembled into a continuous waveform in a plan view by welding a plurality of the above.   The bottomless concave portion (11x) and the bottomed convex portion (11y) of each standing face plate (11) are added from a plurality of plate segments (11p) bent into a substantially L shape and / or a substantially Z shape in plan view. 5. The load support type expansion and contraction device for a road bridge according to claim 1, wherein the load support type expansion and contraction device is assembled into a continuous comb shape in plan view by welding to a state. The bottomed protrusion (11y) of each standing face plate (11) is bent from a single plate segment (11p) into a substantially U-shape in plan view, or two separate plate segments (11p-1) ( 11p-2) and welding in a substantially U shape in plan view.
By cutting the substantially U-shaped plate segments (11p), (11p-1), and (11p-2) at both end base portions to the partition wall plates (20), (22), and (24), respectively, the bottom ends are welded. Each of the convex portions (11y) is partitioned into rectangular shapes in plan view,
The rectangular bottomed convex portion (11y) and the relatively substantially inverted U-shaped bottomless concave portion (11x) that escapes the rectangular bottom convex portion (11x) are assembled into an overall comb shape in plan view that alternates. 5. A load-supporting telescopic device for a road bridge according to claim 1, 2, 3 or 4. The bottomed convex portion (11y) of each standing face plate (11) is bent from a single plate segment (11p) into a substantially square shape or a substantially L shape in plan view, or two separate plate segments (11p) -1) Welding from (11p-2) to a substantially square shape or a substantially letter shape in plan view,
By cutting the substantially square-shaped or substantially letter-shaped plate segments (11p), (11p-1), and (11p-2), the bases at both ends are abutted against the partition wall plates (20) (22) (24), respectively. The bottomed convex portion (11y) is divided into triangles in plan view,
The triangular bottomed convex part (11y) and the relative substantially reverse square shape or the substantially reverse letter-shaped bottomless concave part (11x) which escapes this triangle are alternated as a whole in plan view. The load-supporting type expansion / contraction device for a road bridge according to claim 1, 2, 3, or 4, which is assembled in a sawtooth shape.   Protrusions (23) serving as gibbles for the post-cast concrete (17) from the plate segments (11p) (11p-1) (11p-2) that define the bottomed convex portions (11y) of the standing face plates (11) The load-supporting telescopic device for a road bridge according to claim 10 or 11, wherein   From the bottomed convex portion (11y) of each standing face plate (11) to the lower gap (O1) of the partition wall plate (20) or the mutual gap (O2) between the upper partition wall plate (20) and the lower partition wall plate (22). 4. A load-supporting expansion / contraction device for a road bridge according to claim 1, wherein the distribution anchors (16) made of steel bars or steel plates are integrally extended and extended in the rear direction. A thin first plate segment (11p-1) in which the bottomed convex portion (11y) of each standing face plate (11) is bent into an L shape in plan view, and a thicker straight second plate segment (11p-2) and welding in a substantially U shape in plan view,
While welding the separation base end of the first plate segment (11p-1) to the partition wall plates (20) and (22), respectively,
Using the second plate segment (11p-2) as a distribution anchor (16), the lower gap (O1) of the partition wall plate (20) or the upper partition wall plate (20) and the lower partition wall plate (22) 14. The load-supporting type expansion / contraction device for a road bridge according to claim 13, wherein each of the extension supports extends in the rear direction through the gap (O2). The bottomed convex portion (11y) of each standing face plate (11) is composed of a thin straight first plate segment (11p-1) and a thicker straight second plate segment (11p-2). , Welding to a substantially square shape or a substantially letter shape in plan view,
While welding the separation base end of the first plate segment (11p-1) to the partition wall plates (20) and (22), respectively,
Using the second plate segment (11p-2) as a distribution anchor (16), the lower gap (O1) of the partition wall plate (20) or the upper partition wall plate (20) and the lower partition wall plate (22) 14. The load-supporting type expansion / contraction device for a road bridge according to claim 13, wherein each of the extension supports extends in the rear direction through the gap (O2).   To the midway height position of the partition wall plate (24) that totally blocks the box opening recess (G) and the bottomed convex portion (11y) of each standing face plate (11), the post-cast concrete (17) 5. A load-supporting type expansion / contraction device for a road bridge according to claim 1 or 4, further comprising a protrusion (23) or a communication port (26) serving as a bevel. A thin first plate segment (11p-1) in which the bottomed convex portion (11y) of each standing face plate (11) is bent into an L shape in plan view, and a thicker straight second plate segment (11p-2) and welding in a substantially U shape in plan view,
While welding the cut off proximal end of the first plate segment (11p-1) to the partition wall plate (24), respectively,
The partition wall plate (24) in an overall blocking state between the bottomed convex portion (11y) and the boxed recess (G) using the second plate segment (11p-2) as a distribution anchor (16) Each of the bottomed convex portions (11y) is divided into rectangular or parallelograms in plan view by extending and extending in the back direction.
An overall comb shape in plan view in which the rectangular or parallelogram-shaped bottomed convex portion (11y) and the relatively substantially inverted U-shaped bottomless concave portion (11x) that escapes the rectangular convex shape are alternated. 5. A load-supporting telescopic device for a road bridge according to claim 1 or 4, characterized in that it is assembled.   In the bottomed convex part (11y) sectioned in a rectangular or parallelogram shape in plan view, post-cast concrete (17) and resin concrete with finer particle size than this, non-shrink mortar, cement mortar, etc. The load-supporting type expansion and contraction device for a road bridge according to claim 17, wherein the various fillings (51) are placed.   From the first plate segment (11p-1) and / or the second plate segment (11p-2) that define the bottomed convex portion (11y) of each standing face plate (11), the filling (17) (51) 19. A load-supporting type expansion / contraction device for a road bridge according to claim 18, wherein a projection (52) serving as a bevel is integrally projected inward.   The partition wall plates (22) and (24) are directly bonded and integrated to the front surface or rear surface of the lower end portion, or are sandwiched via a presser plate (31) separate from the partition wall plates (22) and (24). The road bridge according to claim 1, 3 or 4, characterized in that the substantially parallel meandering gap (D) of the two standing face plates (11) facing each other is shielded from below by a fixed elastic water stop belt (32). Load-supporting telescopic device. Continuously deeper than the bottom surface (12) of the unboxing recess (G) as the concrete floor slab (10) facing the play (S) or the corner chipping prevention cover (36) of the abutment. As well as drooping,
An elastic water-stop belt that is directly bonded to and integrated with the front or rear surface of the corner chipping prevention cover (36) or is clamped and fixed via a presser plate (37) separate from the corner chipping prevention cover (36). 5. The load-supporting expansion / contraction device for a road bridge according to claim 1, wherein the substantially parallel meandering gaps (D) of both standing face plates (11) facing each other are shielded from below by (32). A waterproof belt support stay (34) substantially parallel to the bottom plate (13) of the bottomed convex portion (11y) of each standing face plate (11) is moved from the lower end of the partition wall plates (22) (24) to the clearance ( And projecting forward to S)
An elastic water stop belt that is directly bonded to and integrated with the water stop belt support stay (34) or is sandwiched and fixed between the bottom plate (13) and the water stop belt support stay (34). The load-supporting expansion / contraction device for a road bridge according to claim 1, 3 or 4, wherein the substantially parallel meandering gap (D) of both standing face plates (11) facing each other is shielded from below by 32). The lower end of the partition wall plates (22) and (24) is continuously suspended as a vertical front leg piece (39) of an embedding rack (M) installed in the boxing recess (G),
The substantially parallel rear leg piece (40) facing the front leg piece (39) and the substantially horizontal partition connecting material (41a) or the vertical partition connecting material (which is interposed between the front and back of the both leg pieces (39) (40) ( 41b), the frame (M) is integrated into the lattice form in a plan view in which the post-cast concrete (17) is freely distributed,
While the plurality of stud anchors (42) for assembly work scattered from the upper surface of the mount (M) are integrally raised,
Similarly, an elastic waterproofing belt (32) that is directly bonded and integrated with the front leg piece (39) of the gantry (M) or is clamped and fixed via a presser plate (43) that is separate from the front leg piece (39). The road bridge load-supporting expansion / contraction device according to claim 1, 3 or 4, characterized in that the substantially parallel meandering gap (D) of both standing face plates (11) facing each other is shielded from below. The elastic water stop belt (32) is formed into a curved shape having a unit length substantially corresponding to one lane of the road bridge, and the seam between the unit lengths is sealed by bonding the elastic water stop pad (45). As well as
24. A load-supporting expansion / contraction device for a road bridge according to claim 20, 21, 22 or 23, wherein the elastic waterproofing belt (32) is filled with a sponge or other soundproofing / waterproofing material (46). . The lower end of the partition wall plates (22), (24) is continuously suspended as a vertical leg piece (48) of the L-shaped mounting plate (A) with respect to the steel main beam (47), and
The substantially horizontal concrete floor falling-off prevention piece (49) on which the mounting plate (A) remains is fixed to the main girder (47) by a plurality of screw fasteners (50). 3. A load-supporting telescopic device for a road bridge according to 3 or 4.

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