JP3827664B2 - Joint member for road bridge and its construction method - Google Patents

Description

  The present invention relates to a joint member for a road bridge and a construction method thereof.

  FIG. 1 shows post-cast concrete 3 on the outer surface side of a road bridge joint member 7 in which a pair of corrugated plates 8 and 8 extending in the longitudinal direction of the seam while being bent zigzag so as to form a corrugated clearance 9. 3 is a perspective view of a road bridge joint expansion / contraction device that is constructed by placing 3;

  As a construction method of such a road bridge joint expansion / contraction device, for example, the following method is known (see Patent Document 1). Hereinafter, description will be made with reference to FIG. 2 ((1) to (6) indicate the respective steps).

That is,
(1) The notch steps 4 and 4 are formed at the ends of the opposing floor slabs 1 and 1 by a boxing method or the like.

  (2) A temporary assembly of the road bridge joint member 7 including a pair of corrugated plates 8 and 8 is performed beside the notch step portion 4. That is, the corrugated plates 8 and 8 connected by the rubber seal plate 10 are opposed to each other so as to form an appropriate corrugated gap 9 according to the amount of expansion and contraction of the road, and are separated from the corrugated plate 8 of the corrugated plates 8 and 8. The connecting rods 17 and 17 extending in the longitudinal direction of the seam are temporarily attached to the upper ends of the outer surfaces of the projecting protrusions 8a and 8a. Then, the suspension rod 18 is crossed on the corrugated plates 8, 8, and the suspension rod 18 and the connection rods 17, 17 are coupled.

  (3) The road bridge joint member 7 temporarily assembled in the above step (2) is lowered to the center between the notched steps 4 and 4 of the floor slabs 1 and 1, and both ends of the suspension rod 18 are paved 2 and 2. The road bridge joint member 7 is installed so that each part at the upper end thereof has a predetermined height (pavement surface height).

  (4) The anchors 12 protruding from the outer surfaces of the corrugated plates 8 and 8 are connected to the reinforcing connecting bars 5 of the floor slabs 1 and 1 by welding.

  (5) Remove the suspension rod 18 and the coupling rods 17 and 17 from the corrugated plates 8 and 8.

(6) Post-cast concrete 3 and 3 is placed on the outer surface side of each corrugated plate 8 and 8.
JP 2001-123406 A

  However, the connecting rods 17 and 17 that are temporarily attached to the corrugated plates 8 and 8 in the step (2) are welded to the upper ends of the convex portions 8a and 8a protruding to the outer surface side of the corrugated plates 8 and 8. Since the corrugated plates 8 and 8 are supported, the fulcrum at which the suspension rod 18 supports the corrugated plates 8 and 8 through the connecting rods 17 and 17 is shifted outward from the center of gravity of the corrugated plates 8 and 8. become.

  Therefore, when the road bridge joint member 7 is suspended between the notched steps 4 and 4 of the floor slabs 1 and 1 by supporting both ends of the suspension rod 18 on the pavements 2 and 2 in the step (3). A phenomenon occurs in which the distance between the corrugated plates 8 and 8 is larger than expected at the lower portion of the corrugated plates 8 and 8.

  In other words, for example, in a road bridge joint member 7 manufactured on the assumption that the distance between the corrugated plates 8 and 8 is parallel to the longitudinal section, the distance between the corrugated sheets 8 and 8 is It becomes a letter shape (see FIG. 3). When this is seen about the part exposed to the road surface of the joint member 7 for road bridges, compared with the upper end of the convex part 8a and 8a which protruded to the outer surface side of each corrugated sheet 8 and 8, each corrugated sheet 8 and 8 is compared. It means that the upper ends of the recesses 8b, 8b that are recessed toward the wavy gap 9 side are uniformly lowered to form a step (see FIG. 1).

  Therefore, if the post-cast concretes 3 and 3 are placed while this state is left and the road bridge joint member 7 is fixed to the road bridge joint, the vehicle running performance is significantly impaired. Furthermore, it causes wear and damage to the tire, and the load applied when the wheel of the traveling vehicle collides with the step causes damage to the road bridge joint member 7 and the road surface adjacent to the road bridge joint member 7. It will be.

  Therefore, in order to solve this problem, in the step (3), the both ends of the suspension rod 18 are supported by the pavements 2 and 2 so that the road bridge joint member 7 is connected to the notched steps 4 and 4 of the floor slabs 1 and 1. After suspending in the center between the two, before proceeding to the above step (4), the operator manually controls the spread in the lower part between the corrugated plates 8, 8, and then enters the above step (4), It is conceivable to connect the anchors 12 protruding from the outer surfaces of the corrugated plates 8 and 8 to the reinforcing connecting bars 5 of the floor slabs 1 and 1.

  However, with respect to the phenomenon in which the distance between the corrugated plates 8 and 8 is larger than expected at the lower part of the corrugated plates 8 and 8, the worker on the site manually controls the spread, and the anchor 12 and the reinforcing connection are connected. The construction method for connecting the muscle 5 takes time and labor. Further, the accuracy becomes rough in adjusting the distance between the corrugated plates 8 and 8.

  The present invention has been made in view of such problems. The present invention provides a road bridge joint member and a construction method therefor characterized in that the lower interval between the corrugated plates can be easily regulated. At the same time, the present invention provides a road bridge joint member and a method for constructing the same, which can improve the accuracy of adjusting the lower interval between the corrugated plates.

  Therefore, the present inventor has invented the following invention as a joint member for road bridge and its construction method capable of easily and surely regulating the lower interval between the two corrugated plates to a predetermined interval.

That is, the invention according to claim 1
It comprises two corrugated plates that extend in the longitudinal direction of the seam while bending in a zigzag manner at the road bridge seam, and are placed so as to form a corrugated gap,
A suspension rod coupled to each corrugated plate is passed to the road bridge pavement surface so as to intersect with these on both corrugated plates and to take a fulcrum at a position deviating from the center of gravity of each corrugated plate to the outer surface side. The both corrugated plates are suspended from the road bridge joint,
A joint member for a road bridge that is fixed to the main body of the road bridge via an anchor protruding from the outer surface of the both corrugated plates in that state,
In the lower part of each corrugated plate, there is an interval restrictor insertion hole for passing an interval restrictor for restricting the lower interval between the corrugated plates when suspended on the road bridge joint part, across the corrugated gap. The above-mentioned road bridge joint member is formed so as to correspond to each other.

The road bridge joint member according to the present invention has an interval restrictor insertion hole. The interval restrictor inserted through the interval restrictor insertion hole is attached to the corrugated plates in advance at the time of shipment of the road bridge joint member. Alternatively, it may be attached at the stage of temporarily assembling the road bridge joint member on the pavement surface near the road bridge joint where the notch step is formed, separately from the handling.

The invention according to claim 2
A construction method for installing the road bridge joint member according to claim 1 at a road bridge joint,
The two corrugated plates are opposed so that a wave gap is formed,
The phase corresponding space restricting instrument insertion hole of the lower above-wave plate through the space restricting member, together with the lower spacing the both wave plates is regulated to be a predetermined interval by the space restricting member,
The suspension rod is coupled to the upper ends of the corrugated plates so as to intersect the corrugated plates,
The both corrugated plates are suspended from the road bridge joints by the suspension rods, anchors protruding from the outer surfaces of the corrugated plates are fixed to the road bridge body,
The construction method for the joint member for a road bridge is characterized in that the suspension rod and the distance restricting tool are removed from both the corrugated plates thereafter.

That is, in the method of constructing the road bridge for joint member according to the present invention, through the space restricting member to the space restricting member insertion hole of the full-wave plate, the space restricting member while adjusting the lower interval of the both wave plates Between the notch step portions formed on the joint portion of the road bridge at the joint portion of the road bridge, which is temporarily assembled when the two corrugated plates are fastened and the lower space between the corrugated plates is regulated so as to be a predetermined interval. The road bridge joint member is fixed to the road bridge body through anchors protruding from the outer surface of each corrugated sheet.

Here, even if the corrugated plates are not engaged with each other at the lower portion via the spacing restricting tool, the lower spacing of the corrugated plates will not be expanded more than expected. Therefore, since the role of the earliest distance restricting tool is finished, the distance restricting tool is detached from both the corrugated plates in order to ensure expansion and contraction at the road bridge joint, and the engagement at the lower part of the corrugated plates is released.

As described above, the road bridge for joint member according to the present invention the spacing regulating instrument insertion hole into which the space restricting member for restricting the lower interval are provided in the full-wave plates, the space restricting the joint member for the road bridge By adopting the above-described construction method for inserting the tool, the lower interval between the corrugated plates can be easily regulated. At the same time, it is possible to increase the accuracy of adjusting the lower distance between the corrugated plates.

  Embodiments of the present invention will be specifically described below with reference to the drawings.

<Structure>
Hereinafter, the structure of the road bridge joint expansion / contraction device constructed using the road bridge joint member according to the present invention will be described with reference to FIG.

  Reference numeral 1 is a floor slab, and reference numeral 2 is a pavement. At the opposite ends of the floor slabs 1, 1, notched steps 4, 4 for placing the post-cast concrete 3, 3 are provided by a boxing method or the like. In order to connect the floor slabs 1, 1 and the post-cast concrete 3, 3, reinforcing connecting bars 5 of the floor slabs 1, 1 extend vertically to the notch steps 4, 4. Reference numeral 6 denotes a floor slab space.

  Reference numeral 7 denotes a road bridge joint member. The road bridge joint member 7 is configured by arranging a pair of corrugated plates 8 and 8 extending while bending in a zigzag so that corrugated gaps 9 having a predetermined interval are formed between the corrugated plates 8 and 8. The floor slab space 6 is installed along the floor slab space 6. The corrugated plates 8 and 8 are connected to each other by a rubber seal plate 10 having a U-shaped cross section at the upper part thereof. Further, a bottom plate 11 is fixed to the lower surface of the concave portions 8b, 8b that are relatively recessed toward the corrugated plate 8 side of the corrugated plates 8, 8. Further, a rod-shaped anchor 12 protrudes from the outer surface of each corrugated plate 8, 8 toward the road bridge. The anchor 12 is joined to the reinforcing connecting bar 5 by welding via a through bar 13 extending in the longitudinal direction of the seam, and the road bridge joint member 7 and the floor slabs 1 and 1 are fixed. . The road bridge joint member 7 is formed by connecting units having a certain length in the longitudinal direction of the joint. Reference numeral 19 denotes a unit connecting portion for connecting the units of the road bridge joint member 7.

Reference numeral 14 denotes an interval restricting tool for restricting an interval between the corrugated plates 8 and 8, and is constituted by one bolt 14 a and two nuts 14 b and 14 b in this figure, FIGS. 5 and 6. Bolts 14a are inserted from the outer surface of one corrugated plate 8 into an interval restricting tool insertion hole (bolt inserting hole) 15 provided at the lower part of both corrugated plates 8, 8, and are inserted through the other corrugated plate 8, The corrugated plates 8 and 8 are screwed onto the nuts 14b and 14b on the outer surface to fasten the corrugated plates 8 and 8 together, and regulate the interval between the corrugated plates 8 and 8. It is preferable that there are two or more spacing restriction tool insertion holes (bolt insertion holes) 15 in the longitudinal direction of the joint per unit of the road bridge joint member 7.

  Reference numeral 17 is a connecting rod, and reference numeral 18 is a hanging rod. The connecting rods 17 and 17 are temporarily attached (hammer) so as to extend in the longitudinal direction of the seam on the upper end of the outer surface of the convex portion 8a that protrudes relatively away from the corrugated plate 8 of the corrugated plate 8 and 8. It is connected by simply welding so that it will come off when it is tapped with. The suspension rod 18 is coupled to the connection rods 17 and 17 by bolts (or by temporary attachment) so as to intersect the connection rods 17 and 17 on the road bridge joint member 7. Then, both ends of the suspension rod 18 are supported by the pavements 2 and 2, and the road bridge joint member 7 is suspended in the center between the notch step portions 4 and 4.

  Reference numeral 16 denotes a weir plate that closes the gap so that the concrete does not flow down to the floor slab space 6 when the post-cast concrete 3, 3 is placed on both the notched step portions 4, 4.

  The road bridge body described here as the floor slab 1 may be a concrete girder. (The same applies to construction methods below this point.)

<Construction method>
Hereinafter, the construction method of the joint member for road bridges concerning this invention is demonstrated, referring FIG.4 and FIG.5. (A to F represent processes, respectively.)

  A. The end portions of the opposite floor slabs 1 and 1 are cut out by a boxing method or the like to form notched step portions 4 and 4 for placing post-cast concrete 3 and 3.

  Ba. A temporary assembly of the road bridge joint member 7 is performed alongside the notch step portion 4.

That is, first, the bolt 14a and the nuts 14b and 14b as the space restricting tool 14 are attached to the lower portions of the corrugated plates 8 and 8 connected by the rubber seal plate 10. Specifically, a bolt 14 a screwed with one nut 14 b from the outer surface of one corrugated plate 8 is inserted into a distance restricting tool insertion hole (bolt inserting hole) 15, and this is further regulated for the distance between the other corrugated plate 8. It is made to pass through the tool insertion hole (bolt insertion hole) 15. Then, another nut 14b is screwed from the tip of the bolt 14a. Thus, the bolts 14a are screwed onto the two nuts 14b and 14b on the outer surfaces of the corrugated plates 8 and 8, thereby engaging the corrugated plates 8 and 8 with each other.

  Next, the corrugated plates 8 and 8 are opposed so as to form an appropriate corrugated clearance 9 according to the amount of expansion and contraction of the road, and the corrugated plates 8 and 8 protrude away from the corrugated plate 8 of the counterpart. The connecting rods 17 and 17 extending in the seam longitudinal direction are temporarily attached to the upper ends of the outer surfaces of the portions 8a and 8a (welding is easily performed so that they can be displaced if struck with a hammer).

  Then, the suspension rod 18 is crossed on the corrugated plates 8, 8, and the suspension rod 18 and the connection rods 17, 17 are coupled by bolts (or by temporary attachment).

  The bolt 14a and the nuts 14b, 14b may be attached to the corrugated plates 8, 8 in advance at the time of shipment of the road bridge joint member 7, instead of being performed at this stage.

  Bb. In parallel with the temporary assembly work of the road bridge joint member 7, the lower space between the corrugated plates 8, 8 is adjusted and regulated.

  That is, by adjusting the screwing position of the bolt 14a and the nuts 14b and 14b to a position where the lower interval between the corrugated plates 8 and 8 becomes a predetermined interval, the corrugated plates 8 and 8 are interleaved. Regulate the bottom gap.

The regulation of the lower space between the corrugated plates 8 and 8 may be performed when the corrugated plates 8 and 8 are opposed so as to form an appropriate corrugated clearance 9 according to the amount of expansion and contraction of the road. Alternatively, it may be performed when the connecting rods 17 and 17 are temporarily attached to the outer surface upper ends of the convex portions 8a and 8a of the corrugated plates 8 and 8, respectively. Alternatively, the suspension rod 18 may be crossed on the corrugated plates 8 and 8 and the suspension rod 18 and the connecting rods 17 and 17 may be coupled. In short, it may be performed before proceeding to Step C below.

  C. The temporarily assembled road bridge joint member 7 is lowered to the center between the notched step portions 4 and 4 of the floor slabs 1 and 1, and both ends of the suspension rod 18 are supported by the pavements 2 and 2. The plates 8 and 8 are installed so that each part at the upper end has a predetermined height.

  D. A thread 13 is placed on the anchor 12 protruding from the outer surface of each corrugated plate 8, 8, and each intersection of the anchor 12, the thread 13 and the reinforcing connecting bar 5 of the floor slab 1, 1 is welded. The road bridge joint member 7 is fixed to the floor slabs 1, 1.

  E. The bolt 14a and the nuts 14b, 14b are removed from the outer surface side of the corrugated plates 8, 8, and the engagement at the lower part of the corrugated plates 8, 8 is released. At the same time, the suspension rod 18 and the connection rods 17 and 17 are removed from the corrugated plates 8 and 8.

F. The space restricting tool insertion hole (bolt insertion hole) 15 is closed with a seal or tape, and post-cast concrete 3, 3 is placed on the outer surface side of each corrugated plate 8, 8.

Here, in the construction method described above, the predetermined interval between the corrugated plates 8 and 8 refers to an interval in which the interval at the lower part between the corrugated plates 8 and 8 is opposite to the interval at the upper part (see FIG. 6). However, in some cases, the lower interval may be restricted to be wider or narrower than the upper interval.

The head of the bolt 14a is applied to the outer surface of one corrugated plate 8, the nut 14b is applied to the outer surface of the other corrugated plate 8, and the corrugated plates 8, 8 are formed by the head of the bolt 14a and the nut 14b. You may make it regulate the lower space | interval between.

Further, when the bolt 14a is inserted into the interval restricting tool insertion hole (bolt insertion hole) 15 from the outer surface of one corrugated plate 8, the nut 14b that receives the bolt 14a on the outer surface of the other corrugated plate 8 serving as an outlet is It may be welded to the outer surface of the corrugated plate 8 on the outlet side.

<Effect>
As shown in FIG. 6, since the bolt 14a and the nuts 14b and 14b are used for the phenomenon that the distance between the corrugated plates 8 and 8 is larger than expected in the lower portion of the corrugated plates 8 and 8, the corrugated plates are used. The lower interval between 8 and 8 can be finely adjusted, and the interval can be adjusted with high accuracy.

Further, since the bolts 14a are inserted into the space restricting tool insertion holes (bolt insertion holes) 15 provided in the corrugated plates 8 and 8 in advance and are fastened by the nuts 14b and 14b, the work can be easily performed. , 8 increases the work efficiency of regulating the lower interval.

In addition, as a method of regulating the lower space between the corrugated plates 8 and 8 using the spacing regulating tool 14, in addition to the bolt and nut fastening described in the present embodiment, the spacing regulating tool insertion hole of one corrugated board 8 is used. 15 is used as a screw hole, a bolt 14a is inserted from the outer surface of the other corrugated plate 8, the bolt 14a is applied to the screw hole, and the corrugated plate 8 is formed by the screwed portion and the head of the bolt 14a. , 8 may be regulated.

  Further, the rod inserted from the outer surface of one corrugated plate 8 is fastened to the outer surface of the other corrugated plate 8 using a fastener such as a snap ring. You may regulate so that it may become.

In short, the corrugated plates 8 and 8 can be engaged with each other via the spacing restricting tool 14 and the lower space between the corrugated plates 8 and 8 can be regulated. What can be attached and detached from the side may be used as the interval restricting tool 14.

  The above explanation is applicable to the repair of road bridge joints. In this case, the existing road bridge joint member 7 is removed to form the notched step portions 4 and 4. In this case, a reinforcing bar inserted into the floor slabs 1 and 1 on the notched step portions 4 and 4 may be used instead of or together with the reinforcing connecting bar 5.

The perspective view of the road bridge joint expansion-contraction apparatus after post-casting concrete placement. The longitudinal cross-sectional view which shows the structure of a road bridge joint expansion-contraction apparatus. Explanatory drawing which exaggerates and shows the phenomenon which the lower part space | interval between both corrugated sheets spreads rather than schedule. The perspective view which shows the structure of the road bridge joint expansion-contraction apparatus concerning this invention. The longitudinal cross-sectional view which shows the structure of the road bridge joint expansion-contraction apparatus concerning this invention. Explanatory drawing which shows the state which controls the breadth in the lower part between both corrugated plates using a space | interval control tool.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Floor slab 2 Pavement 3 Post-cast concrete 4 Notch step part 5 Reinforcement connecting rod 6 Floor slab free space 7 Joint member for road bridge 8 Corrugated sheet 8a Convex projecting relatively away from the corrugated sheet of each corrugated sheet Portion 8b Recessed portion 9 corrugated relative to the corrugated plate side of each corrugated plate 10 Corrugated gap 10 Rubber seal plate 11 Bottom plate 12 Anchor 13 Feeding line 14 Spacing restrictor 14a Bolt 14b Nut 15 Spacing restrictor insertion hole 16 Weir plate 17 Connection杆 18 Hanging 杆 19 Unit connection part

Claims (2)

It comprises two corrugated plates that extend in the longitudinal direction of the seam while bending in a zigzag manner at the road bridge seam, and are placed so as to form a corrugated gap,
A suspension rod coupled to each corrugated plate is passed to the road bridge pavement surface so as to intersect with these on both corrugated plates and to take a fulcrum at a position deviating from the center of gravity of each corrugated plate to the outer surface side. The both corrugated plates are suspended from the road bridge joint,
A joint member for a road bridge that is fixed to the main body of the road bridge via an anchor protruding from the outer surface of the both corrugated plates in that state,
In the lower part of each corrugated plate, there is an interval restrictor insertion hole for passing an interval restrictor for restricting the lower interval between the corrugated plates when suspended on the road bridge joint part, across the corrugated gap. It is formed so that it may correspond, The above-mentioned joint member for road bridges characterized by things. A construction method for installing the road bridge joint member according to claim 1 at a road bridge joint,
The two corrugated plates are opposed so that a wave gap is formed,
The phase corresponding space restricting instrument insertion hole of the lower above-wave plate through the space restricting member, together with the lower spacing the both wave plates is regulated to be a predetermined interval by the space restricting member,
The suspension rod is coupled to the upper ends of the corrugated plates so as to intersect the corrugated plates,
The both corrugated plates are suspended from the road bridge joints by the suspension rods, anchors protruding from the outer surfaces of the corrugated plates are fixed to the road bridge body,
After that, the construction method of the joint member for a road bridge is characterized in that the suspension rod and the distance regulating tool are removed from the corrugated plates.

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