JP6260098B2 - Water stop device - Google Patents

Description

  The present invention relates to a water stop device arranged below a telescopic device for a road bridge.

A road bridge is a component of a road bridge. It consists of a plurality of bridge girder arranged.
And the joint part of an abutment and a bridge girder and the joint part of bridge girder are comprised including the expansion device for road bridges.
In general, the expansion device for a road bridge is attached to the opposite ends of the elements constituting the road bridge, that is, the end of the abutment and the end of the bridge girder, or the end of the bridge girder opposite to each other. And a water stop member that is disposed between the joint members and can be expanded and contracted in the direction of the bridge axis (see Patent Document 1).
However, in the above prior art, the water-stopping member is damaged due to aging deterioration and the water-stopping function is lowered, and rainwater leaks downward from the water-stopping member through the gaps, and members such as supports and bridge girders constituting the road bridge There is concern about corroding.
Therefore, it has been proposed to install a hook-shaped rubber sheet under the water stop member of the expansion device for the road bridge so as to close the gap and fix the rubber sheet to an anchor bolt or the like of the expansion device for the road bridge. (See Patent Document 2).

JP 2011-12500 A JP 2003-64612 A

However, since the rubber sheet has a thickness of about 2 to 3 mm, it is easily deformed.
Therefore, the operator must hold the rubber sheet by hand so that the rubber sheet does not fall from the gap during the work of placing the rubber sheet on the gap and fixing it to the anchor bolt of the road bridge telescopic device. The work has become difficult.
This invention is made | formed in view of such a situation, and it aims at providing the water stop apparatus advantageous in improving the workability | operativity at the time of installing between play.

In order to achieve the above object, the present invention forms a seam portion of the road bridge together with mutually opposing ends of elements constituting the road bridge, and is orthogonal to the bridge axis direction of the road bridge between the end surfaces of the end portions. A water stop device disposed below a road bridge expansion / contraction device that absorbs expansion / contraction between the play formed to extend in a direction to extend to the opposite end portions of the element, above and to the opposite end portions. An open concrete filling concave portion is formed, and opposing ends of the element include a slab made of reinforced concrete including concrete filled in the concrete filling concave portion and constituting an end surface of the end portion. A V-shaped recess-forming piece that is formed in the longitudinal direction between the play and in the open direction, and that is elastically deformable in the bridge axis direction of the road bridge and is accommodated in the play, and in the bridge axis direction. Facing each other Yes a locking piece portion of a pair that is embedded in the floor slab portion in a state of being engaged with the engaging enable said bottom surface to the bottom surface of the respectively provided on the upper end of the recess forming piece said concrete charging recesses And a plurality of guide plates arranged at intervals in the longitudinal direction between the play and the plurality of guide plates extending over the entire length in the longitudinal direction between the play and exhibiting an open bowl shape in the longitudinal direction and above the play. The pair of latches of the plurality of guide plates provided at the upper ends of the hook-shaped piece portions accommodated inside the concave portion forming piece portion of the guide plate and the hook-shaped piece portions facing each other in the bridge axis direction, respectively. And a rubber sheet having a plurality of pairs of coupling pieces embedded in the floor slab together with the pair of locking pieces.

Before being placed in the play, a plurality of guide plates are attached to the rubber sheet, and the shape of the hook-like piece of the rubber sheet is held in advance by the plurality of guide plates, so the rubber sheet can be easily placed in the play. This is advantageous for reliable operation.
In addition, since the locking pieces of the plurality of guide plates are locked to the ends of the bridge beams facing each other and the rubber sheet is prevented from falling downward by the guide plate, the rubber sheet can be easily arranged in the gap. This is more advantageous for reliable operation.

It is a front view which shows the structure of the water stop apparatus 30 of embodiment. It is the 1st sectional view showing the construction procedure of expansion device 10 for road bridges, and water stop device 30. It is the 2nd sectional view showing the construction procedure of expansion and contraction device 10 for road bridges, and water stop device 30. It is the 3rd sectional view showing the construction procedure of expansion device 10 for road bridges, and water stop device 30.

Next, embodiments of the present invention will be described with reference to the drawings.
In the present embodiment, as shown in FIG. 4, the road bridge is configured such that the bridge girders 2 supported by the piers are arranged in the direction of the bridge axis, and the joint portion 4 of the bridge girders 2 includes the bridge girders 2 facing each other. It is comprised including the edge part 2A, the expansion-contraction apparatus 10 for road bridges, and the water stop apparatus 30 which concerns on this invention, and the code | symbol 2B has shown the pavement surface in FIG.
A gap S extends in the direction orthogonal to the bridge axis direction of the road bridge between the end faces of the end 2A of the bridge girder 2 which is an element constituting the road bridge, and the dimension of the gap S in the bridge axis direction varies with temperature, etc. Increase or decrease according to the expansion and contraction of the bridge girder 2 in the bridge axis direction.
The expansion / contraction device 10 for road bridges is disposed above the gap S and absorbs the expansion / contraction of the gap S.

In the present embodiment, each end 2A of the bridge girder 2 is provided with a recess 2C ( corresponding to a concrete filling recess in the claims) , and the road bridge telescopic device 10 is provided via the recess 2C. It is provided in the play space S.
The expansion device 10 for a road bridge includes a joint member 12, a water stop member 14, and a floor slab portion 16.

The floor slab portion 16 is made of reinforced concrete, and is embedded with an anchor bar 18 embedded in the upper surface of the recess 2C of the end 2A of the facing bridge girder 2 ( corresponding to the bottom surface of the concrete filling recess in the claims) , 18 and the reinforcing bar 20 assembled on the upper surface and the concrete 22 placed in the recess 2 </ b> C so as to cover the anchor bar 18 and the reinforcing bar 20.
The upper surface of the floor slab portion 16 is formed to be flush with the pavement surface 2B.

The joint member 12 is attached to end portions of the floor slab portion 16 facing each other.
The joint member 12 includes a side plate 1202 and a bottom plate 1204, and is integrally formed of a steel material.
The side plate 1202 extends over the entire length in a direction orthogonal to the bridge axis direction of the end 2A of the bridge girder 2 and is flush with the upper surface of the pavement surface 2B formed on the upper surface of the bridge girder 2 (upper surface of the road bridge). It has an end surface, an inner surface 1202A facing each other, and an outer surface 1202B positioned on the opposite side.
On the outer side surface 1202B, reinforcing bars 24 embedded in the floor slab portion 16 project in the horizontal direction.
The bottom plate 1204 extends over the entire length in the longitudinal direction of the side plate 1202, protrudes from the lower end of the side plate 1202 toward each other, and the front end surfaces of the bottom plate 1204 face each other.
The joint member 12 is disposed between the end portions 2A of the bridge girder 2 facing each other so as to face each other with the gap S therebetween.

The water stop member 14 prevents downward flow of rainwater that enters the play space S in the case of rain or the like.
The water stop member 14 extends over the entire length in a direction orthogonal to the bridge axis direction of the joint member 12, and is configured to connect between the inner side surfaces 1202 </ b> A of the opposing side plates 1202 and extend and contract in the bridge axis direction. .
In the present embodiment, the water stop member 14 includes a base portion 1402, two bent portions 1404 that protrude from both sides of the upper end of the base portion 1402, and two leg portions that protrude from the lower end of the base portion 1402. 1406.
The tips of the two bent portions 1404 are attached to the inner side surfaces 1202A of the joint member 12 facing each other.
The lower ends of the two leg portions 1406 are respectively attached to the bottom plates 1204 of the joint member 12 facing each other.
Therefore, when the facing bridge girder 2 expands and contracts in the bridge axis direction due to a temperature change or the like, the bending portion 1404 expands and contracts in the bridge axis direction following the expansion and contraction of the bridge girder 2, and the leg portion 1406 deforms in the bridge axis direction.
The water stop member 14 is made of a conventionally known elastic material such as rubber.

The water stop device 30 is arranged at the position of the play S below the expansion device 10 for the road bridge.
As shown in FIG. 1, the water stop device 30 includes a plurality of guide plates 32, a single rubber sheet 34, and a plurality of pressing plates 36.

The guide plate 32 is made of metal, and the guide plate 32 includes a recess forming piece portion 3202 and a pair of locking piece portions 3204.
The recess forming piece 3202 is formed in such a size that an open recess is formed in the longitudinal direction and above the gap S and is accommodated in the gap S.
The recess forming piece 3202 is formed to be elastically deformable in the direction of the bridge axis of the road bridge.
In this embodiment, the recess forming piece 3202 is configured in a V shape by a bottom 3202A that is bent downward and a pair of upstanding portions 3202B that rises from both sides of the bottom 3202A.
Note that the shape of the concave portion that is open in the longitudinal direction and upward of the gap S formed by the concave portion forming piece portion 3202 is not limited to a V shape or a U shape, and in short, a saddle-shaped piece portion of a rubber sheet 34 described later. What is necessary is just the magnitude | size and shape in which 3402 is accommodated.
The pair of locking pieces 3204 are respectively provided at the upper ends of the recessed portion forming pieces 3202 facing each other in the bridge axis direction, and are provided on the upper surface of the recessed portion 2C of the end portion 2A of the bridge girder 2.
Each locking piece 3204 is provided with a wire W coupled to the anchor bar 18, and each locking piece 3204 and the anchor bar 18 are connected to each other.

The rubber sheet 34 is made of a band-shaped rubber material extending with a constant width, and includes a flange-shaped piece portion 3402 and a plurality of pairs of connecting piece portions 3404.
The hook-shaped piece 3402 extends over the entire length in the longitudinal direction of the gap S, has an open hook shape in the longitudinal direction of the gap S and above, and is accommodated inside the recess-forming pieces 3202 of the plurality of guide plates 32. Are arranged.
The plurality of pairs of coupling pieces 3404 are provided at the upper ends of the hook-shaped pieces 3402 facing each other in the bridge axis direction, and are coupled to the pair of locking pieces 3204 of the plurality of guide plates 32, respectively.
In the present embodiment, since the rubber sheet 34 is made of a band-shaped rubber material extending at a constant width, the plurality of pairs of coupling pieces 3404 are rubber sheets at a plurality of positions spaced in the longitudinal direction of the rubber sheet 34. It is comprised in the location located in the both ends of the width direction of 34, respectively.

In the present embodiment, a plurality of pressing plates 36 are provided, and bolts 38 and nuts 40 are used between the holding pieces 3404 of the rubber sheet 34 and the locking pieces 3204 of the respective guide plates 32 by the holding plates 36. Thus, the coupling piece portion 3404 of the rubber sheet 34 is coupled to the locking piece portion 3204 of each guide plate 32.
The holding plate 36 has an upper portion 3602 that is overlaid on the coupling piece portion 3404 and a lower portion 3604 that is overlaid on the upper portion of the bowl-like piece portion 3402.
The lower portion 3604 holds the shape of the hook-shaped piece portion 3402 of the rubber sheet 34 in a stable state.
The above-described locking piece 3204, bolt 38, nut 40, and upper portion 3602 of the pressing plate 36 are embedded in the floor slab portion 16.

In the present embodiment, as shown in FIG. 4, a belt-like member 42 made of urethane sponge extending over the entire length in the longitudinal direction of the gap S is arranged inside the upper part of the recess forming piece 3202.
The strip-shaped member 42 prevents the concrete 22 from entering the concave portion forming piece 3202 when the concrete 22 is placed on the floor slab 16.

Next, with reference to FIGS. 1-4, the construction procedure of the expansion / contraction apparatus 10 for road bridges and the water stop apparatus 30 is demonstrated.
First, for example, two steel materials such as I-shaped steel are arranged in parallel at a predetermined interval, and the locking piece portions 3204 at both ends are locked between the steel materials, and a plurality of guide plates 32 are fixed to each other. Arrange them in a straight line at intervals.
Next, as shown in FIG. 1, the rubber sheet 34 is bent to form the hook-shaped piece portion 3402 so as to be accommodated inside the recess-forming piece portion 3202 of the guide plate 32, and the hook-shaped piece portion 3402 is formed. The plurality of guide plate 32 is inserted into the inside of the recessed portion forming piece portion 3202, and a plurality of pairs of coupling piece portions 3404 are overlapped with a corresponding pair of locking piece portions 3204.
Next, the upper plate 3602 is overlaid on the plurality of pairs of coupling pieces 3404 and the lower plate 3604 is overlaid on the upper part of the recess forming piece 3202 to place the holding plate 36, and a plurality of pairs of bolts 38 and nuts 40 are used. The coupling piece portion 3404 is coupled by being sandwiched between the pair of locking piece portions 3204 and the upper portion 3602.

When the water stop device 30 including the guide plate 32, the rubber sheet 34, and the pressing plate 36 is assembled in this way, as shown in FIG. 2, the recess forming piece 3202 of the guide plate 32 is stopped downward. The water device 30 is inserted from above into the play S between the ends 2A of the bridge girder 2, and the pair of locking pieces 3204 of the plurality of guide plates 32 are locked to the upper surface of the recess 2C of the end 2A of the bridge girder 2. Let
Next, the belt-like member 42 is pushed into the inside of the upper portion 3602 of the concave portion forming piece 3202 without any gap. Accordingly, since the recess forming piece 3202 receives a force in the direction of opening outward due to the elastic force of the belt-like member 42, the pair of locking pieces 3204 are pressed against the upper surface of the recess 2 </ b> C of the end 2 </ b> A of the bridge girder 2. It is securely locked by the upper surface of 2C.

Next, each locking piece 3204 and the anchor bar 18 are connected via the wire W, and the coupling structure of the guide plate 32 and the rubber sheet 34 to the floor slab portion 16 is further strengthened.
Further, the reinforcing bars 20 of the floor slab portion 16 are arranged, and the reinforcing bars 20 and the anchor bars 18 are connected.
Further, as shown in FIG. 3, the rebar 24 attached to the side plate 1202 of the road bridge expansion and contraction device 10 is coupled to the rebar 20 and the anchor bar 18 of the floor slab portion 16, and the joint of the road bridge expansion and contraction device 10. The member 12 and the water stop member 14 are disposed.
Next, as shown in FIG. 4, concrete 22 is placed on the upper surface of the recess 2 </ b> C to form the floor slab portion 16 of the road bridge telescopic device 10.
By placing the concrete 22, the anchor bars 18, the reinforcing bars 20 and 24, the coupling piece part 3404, the locking piece part 3204, the upper part 3602, the bolt 38 and the nut 40 are covered with the concrete 22.
The road bridge telescopic device 10 and the water stop device 30 are assembled as described above.

According to the present embodiment, the rubber sheet 34 having the hook-shaped piece portion 3402 is disposed in the gap S via the plurality of guide plates 32.
That is, the shape of the hook-shaped piece portion 3402 of the rubber sheet 34 is held in advance before being mounted in the play S by the plurality of guide plates 32, and therefore the rubber sheet 34 is easily and reliably disposed in the play S. This is advantageous.
A plurality of guide plates 32 are arranged by engaging the pair of locking pieces 3204 with the end portions 2 </ b> A of the bridge girder 2 facing each other, and the rubber sheet 34 is integrated into the clearance S together with the plurality of guide plates 32. Therefore, the guide plate 32 prevents the rubber sheet 34 from falling downward, which is more advantageous in easily and reliably arranging the rubber sheet 34 in the gap S.

In addition, since the plurality of pressing plates 36 that sandwich the coupling piece portion 3404 of the rubber sheet 34 with the locking piece portion 3204 of each guide plate 32 are provided, the shape of the hook-like piece portion 3402 of the rubber sheet 34 is stabilized. Therefore, it is more advantageous to easily and reliably arrange the rubber sheet 34 in the gap S.
Further, since the locking piece portion 3204 and the coupling piece portion 3404 are embedded in the floor slab portion 16, it is advantageous for maintaining the shape of the flange-like piece portion 3402 of the rubber sheet 34 over a long period of time.
Even when the rubber sheet 34 is deteriorated due to long-term use, the guide plate 32 is advantageous in preventing the rubber sheet 34 from falling.
Further, since the bolt 38 and the nut 40 are embedded in the floor slab portion 16 together with the locking piece portion 3204, the coupling piece portion 3404, and the upper portion 3602 of the holding plate 36, the support structure of the rubber sheet 34 on the bridge girder 2 side becomes stronger. This is advantageous in maintaining the shape of the hook-shaped piece 3402 of the rubber sheet 34 over a long period of time and preventing the rubber sheet 34 from falling.

  In addition, although embodiment demonstrated the case where the water stop apparatus 30 was attached to the edge part 2A of the bridge girder 2 which mutually opposes, the water stop apparatus 30 is the edge which mutually opposes the element which comprises a road bridge. The water stop device 30 may be attached to the end portion of the abutment and the end portion 2A of the bridge girder 2 that are opposite to each other as long as they constitute the joint portion 4 of the road bridge.

  2 ... Bridge girder, 2A ... End of bridge girder, 4 ... Joint part, 10 ... Telescopic device for road bridge, 16 ... Floor slab part, 18 ... Anchor bar, 30 ... Water stop device, 32 ... ... Guide plate, 3202 ... Concave-forming piece part, 3204 ... Locking piece part, 34 ... Rubber sheet, 3402 ... Ring-like piece part, 3404 ... Coupling piece part, 36 ... Presser plate, 3602 ... Upper part, 3604 ... lower part, 38 ... bolt, 40 ... nut, S ... free space, W ... wire.

Claims (5)

The joints of the road bridge together with the mutually opposing ends of the elements constituting the road bridge, and expansion and contraction between the ends formed in the direction perpendicular to the bridge axis direction of the road bridge are formed between the end faces of the ends. A water stop device disposed below the telescopic device for absorbing the road bridge,
At the opposite ends of the element, an open concrete filling recess is formed upward and toward the opposite ends,
The mutually opposing ends of the element include a floor slab portion made of reinforced concrete including concrete filled in the concrete filling recess and constituting an end surface of the end portion,
A V-shaped recess-forming piece portion that is formed in the longitudinal direction and above the play and has an open recess and is elastically deformable in the bridge axis direction of the road bridge and accommodated in the play is opposed to the bridge axis direction. a locking piece portion of a pair that is embedded in the floor slab portion in locked state to the locking possible the bottom surface to the bottom surface of said concrete charging recesses respectively provided at the upper end of the recess forming piece to A plurality of guide plates arranged at intervals in the longitudinal direction between the play,
A hook-shaped piece portion that extends over the entire length in the longitudinal direction between the play and that has an open hook shape in the longitudinal direction and above the play and is accommodated inside the recess-forming piece portion of the plurality of guide plates; Provided at the upper ends of the hook-shaped piece portions facing each other in the bridge axis direction, respectively coupled to the pair of locking piece portions of the plurality of guide plates, and embedded in the floor slab portion together with the pair of locking piece portions. A rubber sheet having a plurality of pairs of coupling pieces;
A water stopping device comprising: And a plurality of pressing plates that are embedded in the floor slab together with the locking piece and the coupling piece and sandwiching the coupling piece of the rubber sheet with the locking piece of each guide plate. Comprising
The water stop device according to claim 1. The floor slab part is configured to include anchor bars embedded in the bottom surface of the concrete filling recess.
The water stop device according to claim 2. Each presser plate has an upper part superimposed on the coupling piece part, and a lower part superimposed on the upper part of the recess forming piece part,
The locking piece portion, the coupling piece portion and the upper portion are coupled by bolts and nuts,
The bolt and nut are embedded in the floor slab together with the locking piece, the coupling piece, and the upper part.
The water stop device according to claim 3. A wire to be coupled to the anchor muscle is provided on the locking piece.
The water stop device according to claim 3 or 4, characterized in that.

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