JP2011080281A - Expansion device of joint section of road bridge - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an expansion device of a joint section of a road bridge, which facilitates the attachment and replacement of a seal plate for water-sealing a section between a pair of vertical plates. <P>SOLUTION: In this expansion device 1, a pair of steel joint members 10 and 20 and the rubber seal plate 51 are provided as primary members, respectively. The joint members 10 and 20 include the vertical plates 11 and 21 and road surface members 12 and 22, respectively. The vertical plates 11 and 21 are elongated in the longitudinal direction (the width direction of the road bridge) of the joint section of the road bridge in such a manner as to meander like a wave. The road surface members 12 and 22 are provided at the upper ends of the vertical plates 11 and 21 in such a manner that the plate surface is directed in a lateral direction, respectively. A joint gap 31 is formed between the road surface members 12 and 22. Additionally, the vertical plates 11 and 21 are each provided with a shelf member 13 or 23; and the seal plate 51 is laid between both the shelf members 13 and 23, and fixed by means of a bolt 55. The position of the bolt 55 is located at the position to enable tightening from the joint gap 31. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a telescopic device for a road bridge joint.

  As a telescopic device for a road seam portion, a device comprising a pair of vertical plates extending parallel to the longitudinal direction of the seam at the seam portion of the road bridge and a seal plate for sealing and sealing between the vertical plates is generally used. It is known (for example, refer to Patent Document 1). The seal plate has a bent portion at the center, and both side portions are coupled to the inner surfaces of the vertical plates facing each other by vulcanization adhesion. In addition, it is common practice to use an adhesive or bolt fastening to bond the seal plate to the vertical plate.

Japanese Examined Patent Publication No. 62-53644

  However, the attachment of the seal plate by vulcanization bonding has a high bonding strength with respect to the vertical plate, but it is necessary to perform bonding work at the factory, and skill is required to perform reliable bonding. Also, since the vertical plate and the seal plate are pre-assembled at the factory, the packing form becomes bulky, requiring a large inventory space, and the amount that can be transported at the same time is reduced and the efficiency is poor. In addition, there is a problem that damage is easily caused by collapse of the load.

  Further, in the case of a system in which the seal plate is bonded to the vertical plate with an adhesive at the site, strong adhesion cannot be expected, and the seal plate tends to fall off the vertical plate in a relatively short period of time. In addition, when the distance between the opposing vertical plates is narrow, there is a problem that the workability of the bonding operation for bonding the seal plate to the vertical plate is poor.

  Furthermore, in the system in which the seal plate is coupled to the vertical plate by bolt fastening, the bolt cannot be tightened after the expansion device is installed. For this reason, if the seal plate is replaced during repair after construction, it is necessary to crush and remove the post-cast concrete that fixes the expansion device, and to remove the entire expansion device. In addition, it is necessary to place concrete again after replacing the seal plate. These operations cause large vibrations and noises, and may cause damage such as cracks on the road bridge itself, and further increase the working time and construction costs.

  Therefore, the present invention is intended to enable easy and reliable installation and replacement of the seal plate at the construction site and after construction, thereby improving the firm coupling and workability, and reducing the vibration and noise, and the construction time. .

  In order to solve the above-described problems, the present invention is configured such that the seal plate is bolted to the shelf member protruding from the vertical plate, and the bolt fastening position is arranged at a position where the fastening operation can be performed from the gap between the road surface members. did.

That is, the invention according to claim 1
A pair of vertical plates extending in the longitudinal direction of the seam of the road bridge and facing each other,
Protrusions provided in the upper end portion of each vertical plate with the plate surface sideways, protruding in opposite directions and relatively recessed indentations are alternately formed in the seam longitudinal direction, and the respective protrusions A pair of road surface members that form a wavy gap between them and the recess;
A pair of shelf members projecting toward the mating side facing each vertical plate at a position below the road surface member,
A seal plate that seals between the two shelf members, extending in the joint longitudinal direction, and having both side edges bolted to the two shelf members at intervals in the joint longitudinal direction;
The projecting portion and the recessed portion of the road surface member are formed so that each bolt fastening portion of the seal plate is in a positional relationship to be looked into the corrugated space for fastening work from the corrugated space, and the bolt fastening portion is It is arranged.

  As a result, even after the expansion / contraction device is fixed to the road bridge body, it is easy to replace the sealing plates without reducing the working time and construction costs without removing the expansion / contraction device by rolling the post-cast concrete. And no damage to the road bridge itself. In addition, since the seal plate is fixed by bolting, it can be fixed more securely than by bonding with an adhesive, improving reliability, extending the service life of the seal plate, and improving workability. Can be made.

  Here, the convex part of the said road surface member has trapezoid shape, for example, the position of the front-end | tip part is relatively close to the opposing road surface member, and the position of a front-end | tip part is relative to the opposing road surface member. The bolt fastening portion may be arranged at a position viewed from the corrugated gap formed near the tip portion of the small convex portion.

  Further, each of the pair of road surface members has a large convex portion group in which two large convex portions are provided adjacent to each other in the longitudinal direction of the joint of the road bridge, and a small convex portion provided between the large convex portion sets. Both road surface members are formed such that a repetitive pattern with the convex portions is formed, and the small convex portions on the other road surface member are opposed to the concave portions between the two large convex portions constituting the large convex portion set on one road surface member. May be arranged.

  Further, each of the pair of vertical plates has a vertical plate portion located below the large convex portion set of the road surface member protruding to the opposite vertical plate side, and a portion between the large convex portion sets of the road surface member. The vertical plate portion positioned below may be formed in a corrugated shape that is recessed on the opposite side of the relatively opposing vertical plate side.

  Further, the vertical plate portion protruding to the opposite vertical plate side of the vertical plate may be provided such that the upper portion is offset from the opposite vertical plate side rather than the lower portion.

  Further, one shelf member of the pair of shelf members is joined to a lower end surface of one of the pair of vertical plates, and the other shelf member is the one vertical member of the other vertical plate. You may make it provide so that the position of the up-down direction of a pair of said shelf member may mutually differ, such as providing in the side surface which opposes a board.

  Further, the seal plate may be provided such that each side edge portion is in contact with the upper surface of each shelf member and a central portion bulges downward from between both shelf members.

  The seal plate may be bolted by being sandwiched between the shelf member and a pressing plate extending in the longitudinal direction of the seam of the road bridge. In this case, a bent portion that is bent upward is formed at the edge on the vertical plate side of the holding plate, and the bent portion of the holding plate, the side edge of the seal plate, the upper surface of the shelf member, and the idle side of the vertical plate The space surrounded by the side surfaces may be filled with a sealing agent.

  As a result, the gap formed in the vicinity of the tip of the convex portion having a small protrusion amount is often located near the center of the amplitude in the bridge length direction as compared with the convex portion having a large protrusion amount. Therefore, it becomes easy to install the mounting bolts of the seal plate at short intervals, the seal plate can be securely fixed to the shelf member, and the adhesion of the seal plate to the shelf member is improved, and the water stopping property is improved. Can be increased.

  As described above, according to the present invention, the seal plate is fixed to the shelf member by bolt fastening, and the bolt fastening position is arranged at a position where the fastening work can be performed from the gap between the road surface members. It is possible to easily attach and replace the seal plate after the construction of members other than the seal in the apparatus. In addition, since the seal plate can be fixed by bolting, it can be fixed more securely than by bonding with an adhesive, improving the reliability and extending the service life of the seal plate. Can also be improved.

It is sectional drawing of the expansion-contraction apparatus of the road bridge joint part which concerns on Embodiment 1. FIG. It is a perspective view of the expansion-contraction apparatus which concerns on the same form. It is a perspective view showing joint member 10 concerning the form. It is a perspective view showing joint member 20 concerning the form. It is a top view of the expansion-contraction apparatus which concerns on the same form. FIG. 6 is a view taken along line VI-VI in FIG. 5. It is the VII-VII arrow line view of FIG. It is a VIII-VIII arrow directional view of FIG. It is the IX-IX line arrow directional view of FIG. It is a perspective view of the expansion-contraction apparatus of the road bridge joint part which concerns on the modification 1. FIG. It is a perspective view of the expansion-contraction apparatus of the road bridge joint part which concerns on the modification 2. FIG. It is a longitudinal cross-sectional view of the expansion-contraction apparatus of the road bridge joint part which concerns on the modification 3. FIG. It is a longitudinal cross-sectional view of the expansion-contraction apparatus of the road bridge joint part which concerns on the modification 4. It is a top view of the expansion-contraction apparatus of the road bridge joint part which concerns on the modification 5. FIG.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. In each of the following embodiments and modifications, components having functions similar to those of the other embodiments and the like are denoted by the same reference numerals and description thereof is omitted.

Embodiment 1
(Structure of telescopic device)
FIG. 1 shows a road bridge joint portion where a road bridge joint extension device 1 according to the present invention is installed. In the figure, 2 is a road bridge body (concrete slab or concrete girder), and 3 is pavement. The telescopic device 1 includes a pair of steel joint members 10 and 20 and a rubber seal plate 51 as main members. The telescopic device 1 is fixed to the road bridge main bodies 2 and 2 by placing post-cast concrete 5 and 5 on the notched step portions 4 and 4 formed at the ends of the road bridge main bodies 2 and 2 on both sides thereof. Has been.

  As shown in FIGS. 2 to 4, each of the joint members 10, 20 has a plate surface at the upper end of the vertical plates 11, 21 that bend in a wave shape and extend in the longitudinal direction of the road bridge joint (road bridge width direction). A horizontal road surface member 12, 22 is provided, and a gap 31 is formed between the road surface members 12, 22. Here, FIG. 4 shows a perspective view of the joint member 20 viewed from the posture of FIG.

  The above-mentioned vertical plates 11 and 21 are bent in a wave shape, and projecting walls 11 a (FIG. 3) and 21 a (FIG. 2, FIG. 2) projecting to the gap 31 side (the vertical plate 21 side or the vertical plate 11 side that face each other). 4) and relatively recessed recess walls 11d and 21d are provided. The convex walls 11a and 21a are composed of lower convex walls 11b and 21b and upper convex walls 11c and 21c that are offset from the vertical plates 21 and 11 facing the lower convex walls 11b and 21b. Has been. The lower convex wall 11b, 21b and the upper convex wall 11c, 21c are joined by welding, for example, but may be integrally formed. By adopting such an offset structure, the amount of overhang of the cantilever road surface members 12 and 22 can be kept small, while a space for providing a seal plate 51 described later is secured. A plurality of anchors 41 for fixing the joint members 10, 20 to the road bridge body 2 are provided on the rear surfaces of the vertical plates 11, 21 at intervals in the longitudinal direction of the road bridge joint.

  Although not particularly limited, the road surface members 12 and 22 each have a trapezoidal shape and are formed with large convex portions 12a and 22a and small convex portions 12b and 22b that protrude toward the facing road surface members 22 and 12, respectively. Yes. The large convex portions 12a, 22a are provided at the positions of the convex walls 11a, 21a of the vertical plates 11, 21, while the small convex portions 12b, 22b are at the positions of the concave walls 11d, 21d of the vertical plates 11, 21. Is provided. The large convex portion 12a is formed such that, for example, the protrusion amount with respect to the position of the concave wall 11d is larger than that of the small convex portion 12b. Similarly, the large convex portion 22a is formed such that, for example, the protrusion amount with respect to the position of the concave wall 21d is larger than that of the small convex portion 22b.

  The road surface member 12 is formed with a large concave portion 12c and a small concave portion 12d so as to face the large convex portion 22a and the small convex portion 22b of the road surface member 22, respectively. Similarly, a large concave portion 22c and a small concave portion 22d are formed in the road surface member 22 so as to face the large convex portion 12a and the small convex portion 12b of the road surface member 12, respectively. The gap 31 is formed between these irregularities so as to form a waveform.

  Furthermore, the arrangement pattern of the said uneven | corrugated | grooved part longitudinal direction in each road surface member 12 and 22 is as follows. Here, FIG. 2 and the like show the concavo-convex pattern for one cycle, but in the following description, it is assumed that such a pattern is repeatedly arranged continuously. That is, as for the arrangement pattern of the concavo-convex portions of the joint members 10 and 20, the same pattern is continuously repeated. Specifically, for example, in the joint member 10 (or 20), two large convex portions (for example, large convex portions 12a and 12a) sandwich a small concave portion (for example, small concave portion 12d) in the longitudinal direction of the road bridge joint portion. They are arranged next to each other (hereinafter referred to as “large convex portion group”). Two large concave portions (for example, large concave portions 22c and 22c) are disposed between the two large convex portion sets, that is, between the large convex portions (for example, large convex portions 22a and 22a) closer to each other that constitute each large concave portion set. ) Between the small convex portions (for example, small convex portions 22b).

  Moreover, the large convex part 12a and the small convex part 12b in the road surface member 12 are arrange | positioned in the position facing the large recessed part 22c and the small recessed part 22d in the other road surface member 22, respectively. Similarly, the large convex portion 22a and the small convex portion 22b in the road surface member 22 are disposed at positions facing the large concave portion 12c and the small concave portion 12d in the other road surface member 12, respectively. By such an arrangement of the concavo-convex portions, the clearance 31 between the road surface members 12 and 22 has, for example, a waveform in which a plurality of periodic functions such as substantially sine curves having different periods and amplitudes are combined, In addition, the center position of the amplitude is formed so as to sequentially change along the longitudinal direction of the road bridge joint.

  That is, a bending gap is formed between a pair of road surface members extending in the longitudinal direction of the seam of the road bridge, and as the gap, a first corrugated gap extending and extending in the longitudinal direction of the seam, and a bridge from the first corrugated gap It has a configuration including a second corrugated gap portion that bends at a position shifted in the longitudinal direction and extends in the longitudinal direction of the joint.

  Each of the vertical plates 11 and 21 is provided with a shelf member 13 or a shelf member 23, and a seal plate 51 is spanned between the both shelf members 13 and 23. Specifically, a belt-like shelf member 13 having a constant width is joined to the lower end surface of the vertical plate 11 (see FIG. 3). On the other hand, the vertical plate 21 has a side edge shape along the corrugated shape of the vertical plate 21 at a position higher than the lower end of the side surface on the opposite road surface member 12 side, that is, different from the shelf member 13. Are joined (see FIG. 4). A portion of the shelf member 23 joined to the concave wall 21d of the vertical plate 21 is provided with a hanging portion 23b that hangs along the vertical plate 21 from the side edge of the horizontal portion 23a. It comes to be joined more firmly. That is, the shelf member 23 is formed in a shape obtained by cutting a part of the angle member along the corrugated shape of the vertical plate 21. Although not particularly limited, the shelf member 23 shown in FIG. 4 is formed by joining, for example, a member whose overall length is ½ of the total length of the vertical plate 21 for ease of manufacture. On the lower end surface of the vertical plate 21, a trapezoidal bottom plate 24 is provided only in a portion corresponding to the convex wall 21a.

  Both shelf members 13 and 23 are provided with bolt holes 13a and 23c for attaching a seal plate 51 as will be described later, and nuts 54 (see FIG. 1) are welded to the lower surface side.

  The seal plate 51 is laid so that the central portion of the seal plate 51 bulges downward from between the shelf members 13 and 23 and both side edges are in contact with the upper surfaces of the shelf members 13 and 23 (see FIG. 1). ). The joint members 10 and 20 are provided with a unit length (for example, a length of 1 to 3 m in the longitudinal direction of the seam) of the road bridge joints in the seam longitudinal direction, but the seal plate 51 has a sealing property. For improvement, it is formed by a rubber plate continuous over the entire length in the longitudinal direction of the joint of the road bridge joint. However, a plurality of rubber plates may be joined together. The side edge of the seal plate 51 is sandwiched between the shelf members 13 and 23 and the holding plates 52 and 53, and is fixed by fastening nuts 54 and bolts 55 welded to the lower surfaces of the shelf members 13 and 23. Has been.

  The side edges of the pressing plates 52 and 53 are bent upward to form upright portions 52a and 53a. In the space surrounded by the upright portions 52a and 53a of the holding plates 52 and 53, the side edges of the seal plate 51, the upper surfaces of the shelf members 13 and 23, and the side surfaces of the vertical plates 11 and 21, seal rubber 58, 59 (for example, silicon rubber) is filled. Thereby, the water stop of the whole between joint members 10 and 20 is raised. The standing portions 52a and 53a do not necessarily have to be formed. However, by forming the upright portions 52a and 53a, a large space for filling the seal rubbers 58 and 59 is secured, so that the water stoppage can be more reliably increased. .

  Further, between the vertical plates 11 and 21, there are provided a stuffing 56 supported on both sides of the lower surface of the shelf members 13 and 23, and a stuffing 57 supported by the stuffing 56. The road surface members 12 and 22 are in contact with the lower surfaces of the large convex portions 12a and 22a and the small convex portions 12b and 22b. The stuffing 56 is made of, for example, a relatively hard polystyrene material. The stuffing 57 is formed, for example, by solidifying a liquid rubber sealant. These paddings 56 and 57 are formed to have a width corresponding to the distance between the opposing vertical plates 11 and 21 when the width of the gap 31 is maximum in the free state, and when the width of the gap 31 is narrow, the vertical plates It is compressed to 11 and 21, and is shrunk.

  Next, the relationship between the arrangement of the bolts 55 for attaching the seal plate 51 to the shelf members 13 and 23 and the shape of the gap 31 will be described with reference to FIG. Here, in FIG. 5, for the sake of convenience, the paddings 56 and 57 are omitted, and the bolts 55 and the like are drawn with solid lines.

  The position of the bolt 55 is arranged at a position where a tightening operation can be performed from the gap 31. Note that the bolt 55 does not necessarily need to be completely in the region projected from directly above the gap 31 as long as the tool can be appropriately tightened even if the tool is slightly inclined. Therefore, even after the telescopic device 1 is fixed to the road bridge main bodies 2, 2, it is possible to easily replace the seal plate 51 without scooping the post-cast concrete 5.

  Further, as described above, the gap 31 is not a waveform having a constant amplitude in the longitudinal direction of the road bridge joint portion, but the amplitude of the gap is formed by forming the large and small uneven portions on the road surface members 12 and 22 as described above. The size and the center position of the amplitude are formed so as to change sequentially. For this reason, for example, the gap 31 formed between the small concave portion 12d of the road surface member 12 and the small convex portion 22b of the road surface member 22 may be located near the center of the amplitude in the waveform shape of one cycle or more of the gap 31. Become more. In such a case, the bolts 55 for attaching the seal plate 51 to any of the joint members 10 and 20 can be arranged at a relatively short interval. That is, for example, when the large protrusions 12a and 22a have a trapezoidal shape, when the bolts 55 are arranged so as not to be covered near the roots of the large protrusions 12a and 22a, the distance between the bolts 55 is Although it tends to be long, when the small convex portions 12b and 22b are formed as described above, it can be easily arranged at short intervals in the vicinity of the tip portion, so that as a whole, the seal plate 51 The adhesion to the shelf members 13 and 23 can be improved, and the water stoppage can be increased.

  On the other hand, for example, the large protrusions 12a and 22a are arranged at an appropriate frequency as compared with the case where only the small protrusions 12b and 22b are formed over the entire length in the longitudinal direction of the road seam portion, so that the clearance 31 is a vehicle. It is possible to easily suppress the influence on the running performance.

(Construction method)
Next, the construction method of the expansion / contraction device for the road bridge joint will be described in the order of steps.
(1) The notch step 4 is formed by punching out the box at the end of the road bridge body 2 at the time of placing the concrete, or by excavating it afterwards (see FIG. 1).
(2) The joint members 10 and 20 are installed in a state where the clearance 31 has a predetermined size. In this installation, for example, the joint members 10, 20 are cross-attached to the upper surfaces of the joint members 10, 20. What is necessary is just to suspend 20.
(3) While appropriately connecting the reinforcing bars extending in the longitudinal direction of the road bridge joints to the anchors 41 of the joint members 10 and 20, the anchors 41 and appropriate portions of the reinforcing bars are connected to the existing reinforcing bars (floor arrangement of the road bridge main body 2). To the muscle).
(4) Placing the post-cast concrete 5 to the notch step 4 to the road surface height.
(5) Remove the reed from the joint members 10 and 20.
(6) As shown in FIG. 6 to FIG. 9, the seal plate 51 is bulged downward from between the two shelf members 13 and 23, and the side edges are the upper surfaces of the two shelf members 13 and 23. Is further laid down so as to be in contact with each other, further pressed by the pressing plates 52 and 53, and the bolts 55 are inserted into the bolt holes 13a and 23c, screwed into the nuts 54 welded to the lower surfaces of the shelf members 13 and 23, and fixed. .

  Specifically, for example, the bolt 55 appearing in the VI-VI cross section of FIG. 5 is formed between the small convex portion 12b of the road surface member 12 and the small concave portion 22d of the road surface member 22, as shown in FIG. For example, a box wrench can be inserted in the direction indicated by the arrows A and B from the gap 31 and tightened.

  Further, among the bolts 55 appearing in the section VII-VII in FIG. 5, the bolt 55 to be fastened to the shelf member 13 is, as shown in FIG. 7, from the clearance 31 between the large concave portion 12c and the large convex portion 22a, the arrow C It can be tightened in the direction indicated by. In FIG. 7, the bolt 55 to be fastened to the shelf member 23 is depicted as being covered by the large convex portion 22a of the road surface member 22, but the bolt 55 is actually shown in FIG. Since it is shifted from the cross-sectional position in the longitudinal direction of the road bridge joint, it can be tightened.

  Similarly, one of the bolts 55 appearing in the section VIII-VIII in FIG. 5 can be tightened in the direction indicated by the arrow D from the gap 31 between the large convex portion 12a and the large concave portion 22c, as shown in FIG. . The other bolt 55 can also be tightened at a position shifted in the longitudinal direction of the road bridge joint.

  Further, as shown in FIG. 9, the bolt appearing in the IX-IX cross section of FIG. 5 can be tightened in the direction indicated by the arrows E and F from the gap 31 between the small concave portion 12d and the small convex portion 22b.

In addition, after fixing the expansion-contraction apparatus 1 with the post-cast concrete 5 as mentioned above, the seal plate 51 is not attached, but after the seal plate 51 is first attached with the bolt 55, the post-cast concrete 5 is placed. It may be.
(7) After the seal rubbers 58 and 59 are filled between the side edge of the seal plate 51 and the vertical plates 11 and 21, the fillings 56 and 57 are packed between the vertical plates 11 and 21. Specifically, for example, after filling a filling 56 such as a polystyrene foam material, a liquid rubber sealant is injected and solidified to form the filling 57.
(8) When replacing the seal plate 51 after the construction, first, the fillings 56 and 57 are removed, and then the bolts 55 are loosened in the reverse order of the above (6), so that the old seal plate 51 is entirely or What is necessary is just to attach the new sealing board 51 by the same procedure, after removing partially. That is, the seal plate 51 can be easily replaced without scraping the post-cast concrete 5. Moreover, it can maintain the same water-stopping and reliability as the first construction.

-Modification 1-
In the first embodiment, the upper convex walls 11c and 21c in the convex walls 11a and 21a of the vertical plate 11 are provided at positions offset toward the vertical plates 21 and 11 facing the lower convex walls 11b and 21b. Although an example was shown, it is not restricted to this, For example, as shown in FIG. 10, you may form the upright convex wall 11a, 21a flat up and down. That is, for example, when the conditions such that a sufficient space for attaching the seal plate 51 can be secured and the protruding amount of the road surface members 12 and 22 are within a range where sufficient strength can be maintained are satisfied, the flat protrusion as described above is satisfied. By forming the part walls 11a and 21a, the configuration can be simplified.

-Modification 2-
Further, as shown in FIG. 11, the vertical plates 11 and 21 may be configured by flat straight walls 11 e and 21 e that extend over the entire length of the road bridge joint in the longitudinal direction. That is, the strength and rigidity are reduced as compared with the case where the vertical plates 11 and 21 have a corrugated shape, but if the required specifications are still satisfied, the configuration can be greatly simplified.

  In addition, in order to compensate for the strength decrease due to the increase in the amount of overhang of the road surface members 12, 22, a reinforcing plate 61 extending between the vertical plates 11, 21 and the road surface members 12, 22 may be provided.

-Modification 3-
In the first embodiment, the shelf member 13 is provided on the lower end surface of the vertical plate 11 in order to make the height positions of the shelf members 13 and 23 different from each other, while the shelf member 23 is provided on the lower end surface of the vertical plate 21. However, the present invention is not limited to this, and instead of the bottom plate 24 provided only at the lower end of the portion corresponding to the lower convex wall 21b as shown in FIG. As shown in FIG. 4, a belt-like bottom plate 63 continuous in the longitudinal direction of the road bridge joint portion may be provided, and the shelf member 62 may be provided so as to hang from the lower surface of 63. In the case of such a configuration, it is not necessary to form a part of the angle member into a shape cut out along the corrugated shape of the vertical plate 21 as shown in FIG. Can be formed using an angle member having a uniform cross-sectional shape over the entire length, or a band-shaped member having a uniform width can be integrated by welding, thus simplifying the structure. be able to.

  Further, as a similar configuration, the lower end of the vertical plate 21 may be extended below the lower end of the vertical plate 11, and a shelf member similar to the shelf member 13 of the joint member 10 may be provided on the lower surface thereof.

-Modification 4-
Further, the seal plate 51 is not limited to bulge downward from between the shelf members 13 and 23, and may be provided to be bent in an S shape, for example, as shown in FIG. In this case, when the flat seal plate 51 is attached, it is not necessary to bend it with a small curvature near the bolt fastening position as shown in FIG.

  Further, the shelf member 13 is extended toward the vertical plate 21 so that the seal plate 51 is supported, and an effect of preventing damage such as when a wheel load is applied to the seal plate 51 is provided. Also good.

-Modification 5-
The road surface members 12 and 22 are not limited to projecting from the vertical plates 11 and 21 only to the facing road surface members 22 and 12, respectively, but are also projected on the opposite side to the road surface members 22 and 12, as shown in FIG. The sections 12e and 22e may be overhanged so that the vertical plates 11 and 21 and the road surface members 12 and 22 have a T-shaped cross section. In this way, the road surface members 12 and 22 are projected to the opposite side to the road surface members 22 and 12 to widen the width of the road surface members 12 and 22 so that the large convex portions 12a and 22a are on the road surface members 22 and 12 side. Even if the cantilever-like protrusion amount is increased, it is possible to easily withstand the wheel load applied to the large convex portions 12a and 22a.

  Here, the road surface members 12 and 22 may be projected so that the side edge on the opposite side to the road surface members 22 and 12 is linear, but in the case of projecting like the convex portions 12e and 22e, Post-cast concrete 5 (see FIG. 1) can be placed from both sides of the convex portions 12e and 22e, and a concrete compactor can be applied from both sides of the convex portions 12e and 22e. It is possible to increase the strength of the post-cast concrete 5 by turning the cast concrete 5 to the bottom surfaces of the convex portions 12e and 22e to every corner and sufficiently rotating the cast concrete 5 to the back surfaces of the vertical plates 11 and 21. In addition, even if the upper surface of the post-cast concrete 5 is slightly worn due to crushing, the running performance of the vehicle is not greatly reduced.

1 Telescopic device
2 road bridge body
3 Paving
4 Notch steps
5 Post-cast concrete
10,20 Joint member
11, 21 Vertical plate
11a, 21a Convex wall
11b, 21b Lower convex wall
11c, 21c Upper convex wall
11d, 21d recessed wall
11e, 21e straight wall
12,22 Road surface member
12a, 22a Large convex part
12b, 22b Small convex part
12c, 22c large recess
12d, 22d small recess
12e, 22e Convex part
13,23 Shelf member
13a, 23c Bolt hole
23a Horizontal part
23b hanging part
24 Bottom plate
31 Yuma
41 Anchor
51 Seal plate
52, 53 Presser plate
54 Nut
55 volts
56,57 Stuffing
58, 59 Seal rubber
61 Reinforcing plate
62 Shelf member

Claims (1)

A pair of vertical plates that extend in the longitudinal direction of the seam of the road bridge and face each other;
Protrusions provided in the upper end portion of each vertical plate with the plate surface sideways, protruding in opposite directions and relatively recessed indentations are alternately formed in the seam longitudinal direction, and the respective protrusions A pair of road surface members that form a wavy gap between them and the recess;
A pair of shelf members projecting toward the mating side facing each of the vertical plates at a position below the road surface member;
A seal plate that seals between the two shelf members, extending in the joint longitudinal direction, and having both side edges bolted to the two shelf members at intervals in the joint longitudinal direction;
The projecting portion and the recessed portion of the road surface member are formed so that each bolt fastening portion of the seal plate is in a positional relationship to be looked into the corrugated space for fastening work from the corrugated space, and the bolt fastening portion is A telescopic device for a road bridge joint, which is arranged.

Images