JP7192245B2 - Water stoppage device for road bridge expansion and contraction device - Google Patents

Description

TECHNICAL FIELD The present invention relates to a water stop device for a road bridge expansion device.

Road bridges are composed of, for example, abutments arranged at both ends in the axial direction, and one or more floor slabs arranged in the axial direction between the abutments, as elements constituting the road bridge. there is
A joint portion between the abutment and the floor slab and a joint portion between the floor slabs are configured including a road bridge expansion/contraction device.
Road bridge expansion joints are generally installed at the mutually opposing ends of the elements that make up the highway bridge, that is, the mutually opposing abutment and deck slab ends, or the mutually opposing deck slab ends. It comprises a pair of joint members attached to each other.
At the ends of a pair of joint members facing each other, an uneven gap is formed extending in a direction perpendicular to the bridge axis direction, and this uneven gap increases or decreases according to the expansion and contraction of the floor slab in the bridge axis direction. , which absorbs the expansion and contraction of the floor slab.
A water stop device for a road bridge expansion device is arranged below such a pair of joint members, is elastically deformable in a direction perpendicular to the direction of the bridge axis, and is capable of stopping rainwater that has entered through uneven gaps between the pair of joint members. It is intended to prevent the flow down the road bridge.

A water stop device for a road bridge expansion device includes a rubber sheet structure, and the rubber sheet structure includes side plate portions on both sides disposed at mutually opposing ends of elements constituting the road bridge, and side plates on both sides. The side plate portions on both sides of the rubber sheet structure are attached as follows.
That is, the ends of the elements that make up the road bridge are provided with recesses for filling with post-cast concrete for attaching joint members, and a plurality of reinforcing bars protrude from the bottom surface of the recesses. there is
First, mounting metal fittings are assembled for mounting the side plate portions on both sides of the rubber sheet structure to the opposite ends of the elements constituting the road bridge via the plurality of reinforcing bars.
Then, the metal fittings are welded to the plurality of reinforcing bars and attached to the bottom surface of the recess for concrete filling. It is attached using bolts at a plurality of locations.

JP 2018-3315

Therefore, the installation of the water stop device for the expansion and contraction device of the road bridge requires assembly of the mounting hardware, welding of the mounting hardware to the rebar, and attachment of the side plates on both sides of the rubber sheet structure to the mounting hardware using bolts at multiple locations. Installation work was required, and it took time to install the water stop device for the expansion and contraction device of the road bridge, and some improvement was required.
The present invention has been devised in view of the above circumstances, and an object of the present invention is to enable the installation of a water stoppage device for a road bridge expansion and contraction device in a short period of time, and the construction period for installing the water stoppage device for a road bridge expansion and contraction device. To provide a water stop device for a road bridge expansion/contraction device which is advantageous in reducing the cost by shortening the time required for the expansion/contraction device of the road bridge, and in enhancing the degree of freedom in designing the road bridge expansion/contraction device and the road bridge.

In order to achieve the above-mentioned object, the present invention provides a joint portion of the road bridge together with mutually opposed ends of the elements constituting the road bridge, and between the end faces of the mutually opposed ends, the bridge axial direction of the road bridge. A water stop device for a road bridge expansion/contraction device that is arranged below a road bridge expansion/contraction device that absorbs expansion and contraction of a clearance formed extending in a direction orthogonal to the A rubber sheet structure having a width extending in the axial direction of the road bridge and a length extending in a direction orthogonal to the axial direction, the rubber sheet structures being provided at both ends in the width direction. The side plate portions on both sides are contactable with the end surfaces of the mutually opposing ends and are open upward between them, and the side plate portions extend over the entire longitudinal length of the road bridge expansion and contraction device in the direction orthogonal to the bridge axial direction. a lower plate portion extending in the width direction to connect the lower ends of the side plate portions on both sides; and a lower plate portion integrally provided with the side plate portions on both sides and extending in the width direction above the lower plate portion. Then, the vertical intermediate portions of the side plate portions on both sides are connected to form a first shape extending on a plane in a state where no external force is applied to the rubber sheet structure, and the side plate portions on both sides are connected to each other. The side plate portions on both sides are brought into pressure contact with the end surfaces of the mutually opposing end portions by the elastic force of bending deformation from the first shape and returning to the first shape while in contact with the end surfaces of the opposing end portions. and a reaction plate portion that fixes and installs the rubber sheet structure between the opposing ends by a frictional force based on the lower plate portion in a direction perpendicular to the bridge axis direction when viewed from above Projects outward from both ends of the reaction plate portion and the road bridge expansion and contraction device, and erected walls connecting the side plate portions on both sides of the lower plate portion in a direction orthogonal to the bridge axis direction are erected. , a drainage pipe portion for discharging rainwater collected on the lower plate portion is protruded downward at locations near both ends of the lower plate portion in a direction orthogonal to the bridge axis direction, and is connected to the reaction plate portion. In a state where no external force is applied to the rubber sheet structure, the side plate portions on both sides exhibit a convex curved shape toward the center in the width direction of the rubber sheet structure, and the side plate portions on both sides are curved. In a state of being pressed against the end surfaces of the opposite ends of the elements constituting the road bridge, the elastic force of the reaction plate portion forms a flat plate parallel to the end surfaces of the end portions, and the upper and lower portions of the side plate portions on both sides are formed into the shape of a flat plate. It is characterized in that spring steel plates are embedded in the end surfaces of the ends facing each other .
In addition, the present invention forms a joint portion of the road bridge together with the mutually facing ends of the elements constituting the road bridge, and between the end surfaces of the mutually facing ends, a joint is formed in a direction orthogonal to the bridge axis direction of the road bridge. A water stoppage device for a road bridge expansion/contraction device that is arranged below a road bridge expansion/contraction device that absorbs expansion and contraction of an extended gap, wherein the road bridge expansion/contraction device water stoppage device is installed on the bridge axle of the road bridge. a rubber sheet structure having a width extending in the direction of the bridge axis and a length extending in a direction orthogonal to the direction of the bridge axis, wherein the rubber sheet structures are provided at both ends in the width direction and extend at the ends facing each other; The side plate portions on both sides are contactable with the end faces of the bridge and the space between them is open upward, and the road bridge expansion and contraction device is provided integrally with the side plate portions on both sides and extends in the direction perpendicular to the axial direction of the bridge. It extends over the entire length in the longitudinal direction and extends in the width direction to connect the vertical intermediate portions of the side plate portions on both sides, and extends on a plane in a state where no external force is applied to the rubber sheet structure. In a state in which the side plate portions on both sides are in contact with the end surfaces of the end portions facing each other, the elastic force of bending deformation from the third shape and returning to the third shape causes the both side plates to bend. a reaction plate portion for fixing and installing the rubber sheet structure between the mutually opposed end portions by a frictional force based on the pressure contact by pressing the side plate portions against the end surfaces of the mutually opposed end portions, as viewed from above; In this case, both ends of the reaction plate portion protrude outward from both ends of the road bridge expansion and contraction device in the direction perpendicular to the bridge axial direction, and the both ends of the reaction plate portion in the direction perpendicular to the bridge axial direction An upright wall connecting the side plate portions is erected, and a drainage pipe portion for discharging rainwater accumulated on the reaction plate portion is located near both ends of the reaction plate portion in a direction orthogonal to the bridge axis direction. and projecting toward the center in the width direction of the rubber sheet structure in a state where no external force is applied to the rubber sheet structure at the locations of the side plate portions on both sides to which the reaction force plate portions are connected. In a state in which the side plate portions on both sides are in pressure contact with the end faces of the end portions facing each other of the elements constituting the road bridge, the elastic force of the reaction plate portion causes the side plate portions to extend parallel to the end faces of the end portions. Spring steel plates which are in the form of flat plates are embedded so that the upper and lower portions of the side plate portions on both sides are pressed against the end surfaces of the mutually opposing end portions .
Further, the present invention is characterized in that the reaction force plate portion is provided over the entire length of the rubber sheet structure in the length direction.
Further, the present invention is characterized in that a plurality of the reaction force plate portions are provided at intervals in the length direction of the rubber sheet structure.
Further, according to the present invention, a spring steel plate extending in the width direction, which is the bridge axis direction of the reaction plate portion, is embedded in the reaction plate portion, and the spring steel plate prevents external force from being applied to the rubber sheet structure. It assumes a second shape extending along the first shape in a state in which it is not closed, and is bent and deformed from the second shape in a state in which the side plate portions on both sides are in contact with the end faces of the mutually opposing end portions. It is characterized in that the side plate portions on both sides are brought into pressure contact with the end faces of the end portions facing each other in cooperation with the reaction force plate portions due to the elastic force that tends to return to the second shape.
In the present invention, the side plate portions on both sides where the reaction force plate portions are connected are pressed against the end surfaces of the opposite ends of the elements constituting the road bridge. A rigid flat plate parallel to the end surface of the end portion is embedded.
Further , in the present invention, when the side plate portions on both sides are displaced toward each other, the reaction force plate portion is deformed more proactively than the other portions, and the deformation promoting portion determines the bending deformation direction. is provided.
Further, the present invention is characterized in that the outer surfaces of the side plate portions on both sides that are pressed against the end surfaces of the end portions are formed with inclined surfaces that gradually separate from the end surfaces as they go upward.

According to the present invention, the pressure contact portion presses the side plate portions on both sides to the opposite ends of the elements constituting the road bridge, so that the side plate portions on both sides are the elements constituting the road bridge due to the frictional force based on the pressure contact. A rubber sheet structure is secured to opposite ends of the .
Therefore, it is possible to omit the work of assembling the mounting hardware, the work of welding the mounting hardware to the reinforcing bars, and the mounting work of attaching the side plate parts on both sides of the rubber sheet structure to the mounting hardware using bolts at multiple locations, as in the past. This is advantageous in simply and reliably installing the water stoppage device for the expansion and contraction device of the road bridge.
In addition, since there is no need for a connecting structure using bolts or the like for the mutually facing ends of the elements constituting the road bridge or for the road bridge expansion and contraction device, it is possible to vertically connect the mutually facing ends. The installation position of the rubber sheet structure in the direction can be freely selected, which is advantageous in increasing the degree of freedom in the design of the road bridge extension device and the road bridge.
In addition, according to the present invention, which has side plate portions on both sides and a reaction plate portion and does not have a lower plate portion, the structure of the rubber sheet structure can be simplified and reduced in weight, and the This is advantageous in that the water stop device can be easily and reliably installed.
Further, according to the present invention having the reaction plate portion, it is advantageous in reducing the number of parts of the water stop device and simplifying the installation work.
Further, the reaction force plate portion may be provided over the entire length of the rubber sheet structure, or may be provided in plurality at intervals in the length direction of the rubber sheet structure. is appropriately determined according to the required pressure contact force. That is, it is possible to obtain the required pressure contact force depending on the length of the reaction plate portion.
Further, according to the present invention in which the spring steel plate is provided inside the reaction plate portion, a large pressure contact force can be obtained when the side plate portions on both sides are pressed against the mutually facing ends of the elements constituting the road bridge. be advantageous.
Further, the present invention in which flat plates are embedded in the side plate portions on both sides, and the spring in which the side plate portions on both sides exhibit a convex curved shape toward the center in the width direction of the rubber sheet structure in a state where no external force is applied to the side plate portions. According to the invention in which the steel plate is embedded, the adhesion of the side plate portions on both sides to the mutually facing ends of the elements constituting the road bridge is enhanced, and the rubber sheet is inserted between the mutually facing ends of the elements constituting the road bridge. It is advantageous for firmly fixing the structure.
Further, according to the present invention, which is provided with the deformation promoting portion, the direction in which the reaction force plate portion bends and deforms can be determined, which is advantageous in facilitating the installation of the rubber sheet structure. This is advantageous in simply and reliably enhancing the appearance of the water system.
In addition, according to the present invention having inclined surfaces, it is more advantageous to prevent rainwater from falling downward even when the end surfaces of the mutually facing ends of the elements constituting the road bridge have unevenness. becomes.

1 is a cross-sectional view of a state in which the rubber sheet structure of the first embodiment is installed between opposing ends of elements constituting a road bridge; FIG. 1 is a cross-sectional view of a rubber sheet structure according to a first embodiment in a state where no external force is applied; FIG. 1 is a perspective view of a longitudinal intermediate portion of a rubber sheet structure according to a first embodiment; FIG. 1 is a perspective view of a longitudinal end of a rubber sheet structure according to a first embodiment; FIG. FIG. 10 is a perspective view of a longitudinal intermediate portion of the rubber sheet structure of the second embodiment; (A) is a cross-sectional view of the rubber sheet structure of the third embodiment in a state where no external force is applied; FIG. 4 is a cross-sectional view of a state installed between ends facing each other; (A) is a cross-sectional view of the rubber sheet structure of the fourth embodiment in a state where no external force is applied; FIG. 4 is a cross-sectional view of a state installed between ends facing each other; (A) is a sectional view of the rubber sheet structure of the fifth embodiment in a state where no external force is applied; FIG. 4 is a cross-sectional view of a state installed between ends facing each other; (A) to (D) are cross-sectional views of the rubber sheet structure of the sixth embodiment in a state where no external force is applied. (A) to (D) are cross-sectional views of the rubber sheet structure of the sixth embodiment in a state where no external force is applied. (A) is a cross-sectional view of a state in which a rubber sheet structure according to a seventh embodiment is installed between opposing ends of elements constituting a road bridge. (A) is a cross-sectional view of the rubber sheet structure of the eighth embodiment when no external force is applied; FIG. 4 is a cross-sectional view of a state installed between ends facing each other; FIG. 21 is a perspective view of a longitudinal end of a rubber sheet structure according to an eighth embodiment;

Next, this embodiment will be described with reference to the drawings.
(First embodiment)
As shown in FIG. 1, the road bridge expansion/contraction device 10 includes the ends 14 of the elements constituting the road bridge 12 facing each other, that is, the ends 14 of the abutment and the ends of the deck 16 facing each other in the axial direction of the bridge. Alternatively, it includes a pair of joint members 18 respectively attached to the ends 14 of the floor slabs 16 facing each other.
FIG. 1 shows a case where the road bridge extension device 10 is provided between the ends 14 of the floor slabs 16 facing each other.
The ends 14 of the floor slabs 16 facing each other are provided with recesses 14A for filling with post-cast concrete for attaching joint members 18, and a plurality of reinforcing bars 20 protrude from the bottom surfaces of the recesses 14A. there is
The pair of joint members 18 are made of steel, have a length extending in a direction orthogonal to the direction of the bridge axis, and have a side plate portion 22 placed on the bottom surface of the recess 14A and a side plate portion 22 protruding from the upper end of the side plate portion 22. and an upper plate portion 24 .

A plurality of anchor members 26 projecting from the back surface of the side plate portion 22 are embedded in post-cast concrete 28 in a state of being coupled to a plurality of reinforcing bars 20 projecting from the bottom surface of the recess 14A.
The mutually facing surfaces of the side plate portions 22 of the pair of joint members 18 are arranged on the same plane as the end faces 1402 of the mutually facing ends 14 of the floor slabs 16 .
An uneven gap S is formed extending in a direction orthogonal to the bridge axis direction when viewed from above at a location where the upper plate portions 24 of the pair of joint members 18 face each other. It increases or decreases according to the expansion and contraction of the floor slab 16 in the bridge axis direction, and absorbs the expansion and contraction of the floor slab 16 .
In FIG. 1, reference numeral 30 denotes a bridge surface pavement formed on the upper surface of the floor slab 16. As shown in FIG.

The water stop device 32 for the road bridge expansion and contraction device is arranged below the pair of joint members 18, and prevents rainwater that has entered through the uneven gaps S of the pair of joint members 18 from flowing down the road bridge 12. is.
The water stop device 32 for the road bridge expansion device includes a rubber sheet structure 34 that closes the gap between the end faces 1402 of the ends 14 facing each other of the elements constituting the road bridge 12. The rubber sheet structure 34 has a width extending in the axial direction of the road bridge 12 and a length extending in a direction perpendicular to the axial direction.
As shown in FIG. 2 , the rubber sheet structure 34 includes side plate portions 36 on both sides, a lower plate portion 38 and a pressure contact portion 40 .
The side plate portions 36 on both sides are provided at both ends in the width direction of the rubber sheet structure 34, and are formed in a plate shape capable of contacting the end faces 1402 of the end portions 14 facing each other of the elements constituting the road bridge 12, respectively. . That is, the side plate portions 36 on both sides extend from the end faces 1602 of the ends of the floor slabs 16 facing each other in the bridge axis direction, or from the end faces 1602 of the ends of the floor slabs 16 facing each other to the side plate portions of the pair of joint members 18. 22, or the surfaces of the side plate portions 22 of the pair of joint members 18, or the surface of the post-cast concrete 28 formed on the same plane as the end surface 1602 of the end portion of the floor slab 16. It is formed like a plate.
In the present embodiment, the side plate portions 36 on both sides extend over the entire longitudinal length of the road bridge expansion/contraction device 10 in the direction orthogonal to the bridge axis direction, but are spaced apart in the longitudinal direction of the road bridge expansion/contraction device 10. A plurality may be provided every other time.
The lower plate portion 38 is a portion that receives rainwater falling downward from the uneven gaps S of the pair of joint members 18, and extends over the entire longitudinal length of the road bridge expansion and contraction device 10 in a direction orthogonal to the bridge axis direction. doing.
The lower plate portion 38 connects the lower ends of the side plate portions 36 on both sides. The lower plate portion 38 is formed with a uniform thickness except for both ends in the width direction.

The press-contact portions 40 are places where the side plate portions 36 on both sides are press-contacted with the end surfaces 1402 of the end portions 14 facing each other, which constitute the road bridge 12 .
In the present embodiment, the pressure contact portion 40 is formed integrally with the rubber sheet structure 34 and extends in the width direction of the rubber sheet structure 34 above the lower plate portion 38 to connect the side plate portions 36 on both sides. It is composed of a reaction plate portion 42 .
As shown in FIG. 2, the reaction plate portion 42 is in a state in which the side plate portions 36 on both sides are not in contact with the end surfaces 1402 of the opposing end portions 14 of the elements constituting the road bridge 12, that is, the rubber sheet structure. The first shape is assumed when no external force is applied to 34 . In the present embodiment, the first shape is a shape extending on a plane between the side plate portions 36 on both sides, in other words, a flat plate shape.
Then, in a state in which the side plate portions 36 on both sides are in contact with the end surfaces 1402 of the end portions 14 facing each other, the reaction force plate portion 42 is curvedly deformed from the first shape into a downward convex shape as shown in FIG. , the side plate portions 36 on both sides are pressed against the end faces 1402 of the opposite end portions 14 of the elements constituting the road bridge 12 by the elastic force of the reaction plate portion 42 trying to return to the first shape.
The location where both ends of the reaction plate portion 42 in the width direction are connected to the side plate portions 36 on both sides may be the upper end of the side plate portion 36 or the lower end of the side plate portion 36, but in the present embodiment, the reaction force Both ends of the plate portion 42 in the width direction are connected to intermediate portions in the vertical direction (height direction) of the side plate portions 36 on both sides, and the elastic force of the reaction plate portion 42 trying to return to the first shape is applied to the side plates on both sides. It is designed so that it can be efficiently transmitted to the portion 36 .

When the side plate portions 36 on both sides are brought closer to each other while the side plate portions 36 are parallel to each other, it is unclear whether the reaction force plate portion 42 is bent upward or bent downward. When the structure 34 is inserted between the ends 14 facing each other, if the upper ends of the side plate portions 36 on both sides are deformed so as to approach each other, the reaction force plate portion 42 is curved downward.
In this case, the reaction plate portion 42 may be bent upward, but bending and deforming the reaction plate portion 42 downward enhances the appearance of the water stop device 32 for the road bridge expansion and contraction device. is advantageous.
If the first shape is a curved shape that is slightly convex downward in advance, the reaction force plate portion 42 can be reliably bent downward when the side plate portions 36 on both sides are brought closer to each other. can. Although the first shape may be such a shape, if the first shape is a flat plate shape as described above, the side plate portions 36 on both sides are pressed against the end faces 1402 of the end portions 14 facing each other. This is advantageous in obtaining a large pressure contact force.

As shown in FIG. 3, in this embodiment, the reaction plate portion 42 is provided below the pair of joint members 18 over substantially the entire length of the pair of joint members 18 in a direction orthogonal to the bridge axis direction. The reaction force plate portion 42 is formed with a uniform thickness except for both ends in the width direction of the plate portion 42 .
When viewed from above, both ends of the lower plate portion 38 protrude outward from both ends of the pair of joint members 18 and both ends of the reaction plate portion 42 in a direction perpendicular to the direction of the bridge axis. As shown in FIG. 4, upright walls 3802 connecting the side plate portions 36 on both sides are erected at both ends in the direction orthogonal to the direction, and the lower plate portion 38 is provided at a portion near both ends thereof. A drainage pipe portion 3804 for draining rainwater accumulated in the wall is protruded, and a drainage pipe (not shown) is connected to the drainage pipe portion 3804 .

In this embodiment, when installing the water stop device 32 for the road bridge expansion and contraction device, first, when inserting the rubber sheet structure 34 between the mutually facing ends 14 of the elements constituting the road bridge 12, An external force is applied so that the upper ends of the side plate portions 36 on both sides approach each other, and the reaction force plate portion 42 is deformed from the first shape so as to be curved downward, and then the rubber sheet structure is formed in this deformed state. 34 are inserted between the ends 14 of the floor slabs 16 facing each other and the external force is released.
By the operation of inserting the rubber sheet structure 34, the side plate portions 36 on both sides come into contact with the end surfaces 1402 of the end portions 14 facing each other, and the side plate portions 36 on both sides are bent and deformed by the elastic force of the reaction plate portion 42. are pressed against the end surfaces 1402 of the ends 14 facing each other, and the rubber sheet structure 34 is fixed between the ends 14 facing each other of the elements constituting the road bridge 12 .
Therefore, unlike the conventional art, the work of assembling the mounting hardware, the work of welding the mounting hardware to the reinforcing bars, and the mounting work of attaching the side plate portions 36 on both sides of the rubber sheet structure 34 to the mounting hardware using bolts at a plurality of locations are omitted. This is advantageous in simply and reliably installing the water stop device 32 for the road bridge expansion and contraction device.
Therefore, it is advantageous in shortening the construction period for installing the road bridge expansion/contraction device water stop device 32 and reducing the cost of the road bridge expansion/contraction device 10 including the road bridge expansion/contraction device water stop device 32 .
In addition, since a connecting structure using bolts or the like is not required for the ends 14 facing each other of the elements constituting the road bridge 12 or for the road bridge expansion/contraction device 10, the ends 14 facing each other are not required. The installation position of the rubber sheet structure 34 in the vertical direction can be freely selected between them, which is advantageous in increasing the degree of freedom in designing the road bridge expansion and contraction device 10 and the road bridge 12 .
A separate member such as a coil spring may be provided separately from the rubber sheet structure 34 as the pressure contact portion 40 so that the side plate portions 36 on both sides are pressed against the end surfaces 1402 of the end portion 14 facing each other.
Alternatively, a reaction plate portion 42 is provided separately from the rubber sheet structure 34, and both ends in the width direction of the reaction plate portion 42, which is in the direction of the bridge axis, are attached to the side plate portions 36 on both sides by mounting members such as bolts, or Alternatively, they may be attached by being fitted into the grooves of the side plate portions 36 on both sides.
However, if the reaction force plate portion 42 provided integrally with the rubber sheet structure 34 is provided as in the embodiment, the number of parts can be reduced, and the installation work of the water stop device 32 for the road bridge expansion and contraction device can be made more efficient. It is an advantage to do well.

(Second embodiment)
Next, a second embodiment will be described with reference to FIG.
In the following embodiments, the same reference numerals are assigned to the same parts and members as those of the first embodiment, and the explanation thereof is omitted, and the explanation focuses on the parts different from the first embodiment. do.
In the second embodiment, a plurality of reaction plate portions 42 are provided at intervals in the lengthwise direction of the rubber sheet structure 34 . It differs from the first embodiment in that it is separated in multiple directions.
Whether the reaction force plate portion 42 is provided over the entire length of the rubber sheet structure 34 or provided in plurality at intervals in the length direction of the rubber sheet structure 34 depends on the required pressure contact force. determined as appropriate.
According to such a second embodiment, as in the first embodiment, the elastic force of the reaction force plate portion 42 that has been bent and deformed causes the opposite end portions 14 of the elements constituting the road bridge 12 to move. It becomes possible to fix the rubber sheet structure 34 in between, and the same effect as in the first embodiment is exhibited.

(Third Embodiment)
Next, a third embodiment will be described with reference to FIG.
The third embodiment differs from the first embodiment in that a spring steel plate 44 is embedded in the reaction plate portion 42 and extends over substantially the entire length of the reaction plate portion 42 in the width direction, which is the direction of the bridge axis. different from the form.
As shown in FIG. 6A, the spring steel plate 44 extends along the reaction plate portion 42 inside the reaction plate portion 42 while no external force is applied to the rubber sheet structure 34 . In other words, it has a second shape extending along the first shape, and as shown in FIG. In this state, the side plate portions 36 on both sides are pressed against the end faces 1402 of the end portions 14 facing each other in cooperation with the reaction plate portion 42 by the elastic force that bends and deforms from the second shape and tries to return to the second shape. is.
Therefore, in the third embodiment, the pressure contact portion 40 is composed of the reaction plate portion 42 including the spring steel plate 44 .
According to the third embodiment, it is advantageous to press the side plate portions 36 on both sides against the end face 1402 of the end portion 14 with a larger pressure contact force, and the rubber sheet structure 34 is an element constituting the road bridge 12. This is advantageous for a stronger fixation between the ends 14 facing each other.
Further, in the third embodiment, concave portions 3602 recessed toward the reaction plate portion 42 are formed in the outer surfaces of the side plate portions 36 on both sides to which the ends of the reaction plate portion 42 in the width direction are connected. The difference from the first embodiment is that
By providing such recesses 3602, when the rubber sheet structure 34 is installed between the mutually opposing ends 14 of the elements constituting the road bridge 12, the side plate portions on both sides of the end faces 1402 of the ends 14 This is advantageous in increasing the tightness of the outer surface 3604 of 36 and firmly fixing the rubber sheet structure 34 between the opposing ends 14 of the elements making up the road bridge 12 .
The spring steel plates 44 may be embedded over the entire length of the reaction plate portion 42 or may be embedded at intervals in the length direction of the reaction plate portion 42 .

The rubber sheet structure 34 is not provided with the reaction force plate portion 42, but is provided with an upper plate portion extending in the width direction above the lower plate portion 38 and connecting the side plate portions 36 on both sides. A spring steel plate is embedded in the inner wall of the spring, and in a state in which the side plate portions 36 on both sides are in contact with the end faces 1402 of the end portions 14 facing each other, the spring steel plate is curvedly deformed from the second shape and tries to return to the second shape only by the elastic force of the spring steel plate on both sides. The side plate portions 36 may be brought into pressure contact with the end surfaces 1402 of the end portions 14 facing each other.
In this case, the press-contact portions 40 for pressing the side plate portions 36 on both sides to the end faces 1402 of the end portions 14 facing each other of the elements constituting the road bridge 12 are composed of spring steel plates embedded in the upper plate portion. Thus, the reaction plate portion 42 is formed by the upper plate portion in which the spring steel plate is embedded.
In this case, similarly to the third embodiment, recesses 3602 are formed in the outer surfaces 3604 of the side plate portions 36 on both sides, and the adhesion of the outer surfaces 3604 of the side plate portions 36 on both sides to the end surfaces 1402 of the end portion 14 is improved. In addition, the upper plate portion embedded with the spring steel plate may be embedded over the entire length of the lower plate portion 38, or may be spaced apart in the length direction of the lower plate portion 38. It may be buried with

(Fourth embodiment)
Next, a fourth embodiment will be described with reference to FIG.
In the fourth embodiment, the side plate portions 36 on both sides are pressed against the end faces 1402 of the opposite end portions 14 of the elements constituting the road bridge 12 at the locations of the side plate portions 36 on both sides to which the reaction force plate portions 42 are connected. The difference from the first embodiment is that a rigid flat plate 46 parallel to the end surface 1402 of the end portion 14 is embedded in the folded state.
Steel or hard synthetic resin can be used as a material for forming such a flat plate 46 .
The flat plate 46 may be embedded over the entire length of the side plate portion 36 in the longitudinal direction, or may be embedded in plurality at intervals in the longitudinal direction of the side plate portion 36 .
According to the fourth embodiment, the flatness of the side plate portions 36 on both sides is ensured when the side plate portions 36 on both sides are pressed against the end surfaces 1402 of the ends 14 facing each other of the elements constituting the road bridge 12. The adhesion of the outer surfaces 3604 of the side plate portions 36 on both sides to the end surfaces 1402 of the end portions 14 is enhanced, and the rubber sheet structure 34 is firmly fixed between the end portions 14 facing each other of the elements constituting the road bridge 12. advantage over
Further, the configuration in which the flat plates 46 are embedded in the side plate portions 36 on both sides of the fourth embodiment can be applied to all embodiments except the fifth embodiment described below.

(Fifth embodiment)
Next, a fifth embodiment will be described with reference to FIG.
The fifth embodiment differs from the first embodiment in that spring steel plates 48 are embedded in the side plate portions 36 on both sides.
The spring steel plate 48 has a width in the vertical direction and a length along the longitudinal direction of the side plate portion 36, and an intermediate portion in the width direction of the spring steel plate 48 is positioned at a portion of the side plate portion 36 to which the reaction plate portion 42 is connected. doing.
As shown in FIG. 8A, the spring steel plate 48 has a curved shape in which the intermediate portion in the width direction is convex toward the center in the width direction of the rubber sheet structure 34 when no external force is applied to the rubber sheet structure 34 . As shown in FIG. 8B, the side plate portions 36 on both sides are pressed against the end surfaces 1402 of the opposing ends 14 of the elements constituting the road bridge 12, and the reaction plate portion 42 is Due to the elastic force, it becomes a flat plate parallel to the end face 1402 of the end portion 14, and the upper and lower portions of the side plate portions 36 on both sides are pressed against the end faces 1402 of the end portions 14 of the elements constituting the road bridge 12 facing each other.
The vertical positions of the curved top portion of the spring steel plate 48 and the concave portion 3602 are substantially aligned.
According to the fifth embodiment, when the side plate portions 36 on both sides are pressed against the end surfaces 1402 of the ends 14 facing each other of the elements constituting the road bridge 12, the outer surfaces 3604 of the side plate portions 36 on both sides are in close contact. This is advantageous in increasing the strength and rigidly securing the rubber sheet structure 34 between the opposing ends 14 of the elements making up the highway bridge 12 .
The spring steel plates 48 may be embedded over the entire length of the side plate portions 36 on both sides in the longitudinal direction, or may be embedded in plural at intervals in the longitudinal direction of the side plate portions 36 on both sides.
Further, the configuration in which the spring steel plates 48 are embedded in the side plate portions 36 on both sides of the fifth embodiment can be applied to all embodiments except the fourth embodiment.

(Sixth embodiment)
Next, a sixth embodiment will be described with reference to FIGS. 9 and 10. FIG.
In the sixth embodiment, a rubber sheet structure 34 is inserted between the opposing ends 14 of the elements constituting the road bridge 12 in order to improve the appearance of the water stop device 32 for the road bridge expansion device. In other words, when the side plate portions 36 on both sides are displaced toward each other, the reaction plate portion 42 is deformed more proactively than other portions, and the direction in which the reaction plate portion 42 bends and deforms is determined. A deformation promoting portion 50 is provided for determining, in the present embodiment, the direction in which the reaction plate portion 42 bends downward.
That is, the deformation promoting portion 50 is provided in the first embodiment.
The deformation promoting portion 50 is formed by providing a notch in the reaction force plate portion 42, by changing the thickness of the reaction force plate portion 42, or by changing the material of the upper surface portion and the lower surface portion of the reaction force plate portion 42. It can be configured by changing
FIGS. 9A to 9D and 10A to 10C are cross-sectional views of the rubber sheet structure 34 in a state where no external force is applied. That is, the reaction force plate portion 42 is formed with a uniform thickness except for both ends in the width direction.

In the example shown in FIG. 9A, the deformation promoting portion 50 is configured by providing an arc-shaped notch portion 4202 at the center portion of the upper surface of the reaction force plate portion 42 in the width direction.
In the example shown in FIG. 9B, the deformation promoting portion 50 is configured by providing an angular notch portion 4204 in the center portion of the upper surface of the reaction force plate portion 42 in the width direction.
In the example shown in FIG. 9C, the deformation promoting portion 50 is configured by providing a V-shaped notch portion 4206 at the center portion of the upper surface of the reaction plate portion 42 in the width direction.
In the example shown in FIG. 9D, the upper surface of the reaction force plate portion 42 is formed with a flat surface, a bulging portion 4208 is provided at the center of the lower surface of the reaction force plate portion 42 in the width direction, and the reaction force plate portion 42 The thickness of the central part in the width direction of is formed larger than that of the remaining parts.
In the example shown in FIG. 10A, the deformation promoting portion 50 is configured by providing a plurality of arc-shaped notches 4202 at intervals in the width direction of the upper surface of the reaction plate portion 42 .
In the example shown in FIG. 10B, the deformation promoting portion 50 is configured by providing a plurality of arc-shaped notches 4202 at intervals in the width direction of the lower surface of the reaction plate portion 42 .
In the example shown in FIG. 10C, a plurality of arc-shaped cutouts 4202 are provided at intervals in the width direction of the upper surface of the reaction plate portion 42, and adjacent cutouts are provided on the upper surface at intervals in the width direction of the lower surface. A deformation promoting portion 50 is configured by providing a plurality of arcuate cutouts 4202 at intermediate portions of the portion 4202 .
The cutout portions 4202, 4204, 4206 and the bulging portion 4208 may be provided continuously in the longitudinal direction of the reaction plate portion 42, which is the direction orthogonal to the bridge axis direction, or may be provided continuously. 42 may be longitudinally spaced apart.
According to the sixth embodiment, since the direction in which the reaction force plate portion 42 is curved and deformed can be determined by the deformation promoting portion 50, it is advantageous in that the rubber sheet structure 34 can be easily installed, and the road bridge This is advantageous in simply and reliably enhancing the appearance of the expansion device water stop device 32 .
The configuration of this sixth embodiment is applicable to all the embodiments.

(Seventh embodiment)
Next, a seventh embodiment will be described with reference to FIG.
In the seventh embodiment, the outer surfaces 3604 of the side plate portions 36 on both sides that are pressed against the end surfaces 1402 of the ends 14 of the elements that constitute the road bridge 12 are gradually separated from the end surfaces 1402 as they go upward. It differs from the first embodiment in that an inclined surface 3606 is formed.
In the seventh embodiment, after the rubber sheet structures 34 are installed at the ends 14 facing each other of the elements constituting the road bridge 12, the gaps between the inclined surfaces 3606 and the end faces 1402 of the ends 14 are A sealing material 52 is filled and airtightly closed.
According to the seventh embodiment, even if the end faces 1402 of the ends 14 facing each other of the elements constituting the road bridge 12 have irregularities, it is possible to prevent rainwater from falling downward. be advantageous.
The configuration of this seventh embodiment is applicable to all the embodiments.

(Eighth embodiment)
Next, an eighth embodiment will be described with reference to FIGS. 12 and 13. FIG.
The eighth embodiment differs from the first embodiment in that the rubber sheet structure 34A is composed of the side plate portions 36 on both sides and the reaction force plate portion 42A, and does not have the lower plate portion 38. different.
The water stop device 32 for the road bridge expansion joint device of the eighth embodiment has a width extending in the axial direction of the road bridge 12 and a direction perpendicular to the axial direction, as in the first embodiment. and a rubber sheet structure 34A that closes the clearance between the end faces 1402 of the end portions 14 facing each other.
The rubber sheet structure 34A is provided at both ends in the width direction, and extends in the width direction to connect the side plate portions 36 on both sides, which are respectively contactable with the end surfaces 1402 of the end portions 14 facing each other. and a reaction plate portion 42A.
As shown in FIG. 12A, the reaction plate portion 42A assumes the third shape when no external force is applied to the rubber sheet structure 34A. In the present embodiment, the third shape is a shape extending on a plane between the side plate portions 36 on both sides, in other words, a flat plate shape.

Then, in a state in which the side plate portions 36 on both sides are in contact with the end faces 1402 of the end portions 14 facing each other, the reaction plate portion 42A protrudes downward from the third shape as shown in FIG. 12(B). The side plate portions 36 on both sides are pressed against the end faces 1402 of the ends 14 of the elements constituting the road bridge 12 facing each other by the elastic force of the reaction plate portion 42A that is bent and tries to return to the third shape.
Therefore, the pressure contact portion 40 is composed of the reaction plate portion 42A.
The locations where both ends of the reaction force plate portion 42A in the width direction are connected to the side plate portions 36 on both sides may be the upper ends of the side plate portions 36 or the lower ends of the side plate portions 36, but in the present embodiment, the reaction force Both ends of the plate portion 42A in the width direction are connected to intermediate portions in the vertical direction (height direction) of the side plate portions 36 on both sides, and the elastic force of the reaction plate portion 42A trying to return to the third shape is applied to the side plates on both sides. It is designed so that it can be efficiently transmitted to the portion 36 .

The reaction plate portion 42</b>A also functions as a portion that receives rainwater falling downward from the uneven gap S between the pair of joint members 18 . In other words, the reaction plate portion 42A also functions as the lower plate portion 38 of the first embodiment. extends the entire length of the
Both ends of the reaction plate portion 42A in the length direction protrude outward from both ends of the pair of joint members 18 in a plan view in a direction perpendicular to the direction of the bridge axis. As shown in FIG. 13, standing walls 4210 connecting the side plate portions 36 on both sides are erected, and rainwater collecting on the reaction plate portion 42A is drained at locations near both ends of the reaction plate portion 42A. A drain pipe portion 4212 is protruded, and a drain pipe (not shown) is connected to the drain pipe portion 4212 .

According to the eighth embodiment, as in the first embodiment, by inserting the rubber sheet structure 34A between the mutually facing ends 14 of the elements constituting the road bridge 12, the rubber sheet Since the structure 34A is fixed between the ends 14 facing each other, the mounting hardware is assembled, the mounting hardware is welded to the reinforcing bars 20, and the side plate portions on both sides of the rubber sheet structure 34A are used in the conventional manner. It is possible to omit the mounting work of mounting 36 to the mounting hardware using bolts at a plurality of locations, which is advantageous in that the water stop device 32 for the road bridge expansion and contraction device can be easily and reliably installed.
Therefore, it is advantageous in shortening the construction period for installing the road bridge expansion/contraction device water stop device 32 and reducing the cost of the road bridge expansion/contraction device 10 including the road bridge expansion/contraction device water stop device 32 .
In addition, since a connecting structure using bolts or the like is not required for the ends 14 facing each other of the elements constituting the road bridge 12 or for the road bridge expansion/contraction device 10, the ends 14 facing each other are not required. The installation position of the rubber sheet structure 34 in the vertical direction can be freely selected between them, which is advantageous in increasing the degree of freedom in designing the road bridge expansion and contraction device 10 and the road bridge 12 .
In addition, since the lower plate portion 38 is not provided as compared with the first embodiment, the structure of the rubber sheet structure 34A can be simplified and the weight thereof can be reduced, and the cost of the water stop device 32 for the road bridge expansion and contraction device can be reduced. advantage over

It should be noted that the above-described third to seventh embodiments can be applied to the eighth embodiment.
Further, the rubber sheet structure 34A is not provided with the reaction plate portion 42A, but is provided with a connection plate portion having the same shape as the reaction plate portion 42A connecting the vertical intermediate portions of the side plate portions 36 on both sides. A spring steel plate is embedded in the inner wall of the spring, and the side plate portions 36 on both sides contact the end surfaces 1402 of the end portions 14 facing each other. The side plate portions 36 may be brought into pressure contact with the end surfaces 1402 of the end portions 14 facing each other.
In this case, the reaction plate portion 42A is configured by the connection plate portion in which the spring steel plate is embedded.

In this embodiment, the side plate portions 36 on both sides are not in contact with the end surfaces 1402 of the opposing end portions 14 of the elements constituting the road bridge 12, that is, the rubber sheet structure 34 is not subjected to an external force. Although the case where the first and third shapes of the reaction plate portions 42 and 42A and the second shape of the spring steel plate 44 in the absence state are flat plates has been described, the first to third shapes are curved. It may be any shape, and the first to third shapes are not limited to the shapes of the embodiment.
Also, the description has been given of the case where the reaction force plate portion 42 assumes a downward convex curved shape while the side plate portions 36 on both sides are in contact with the end surfaces 1402 of the end portions 14 facing each other. The shape in which the force plate portion 42 is compressed may be a shape in which upwardly convex curved portions and downwardly convex curved portions are alternately arranged in the bridge axis direction. Not limited.

10 road bridge expansion and contraction device 12 road bridge 14 end 1402 end surface 32 water stop device for road bridge expansion and contraction device 34, 34A rubber sheet structure 36 side plate 3604 outer surface 3606 inclined surface 38 lower plate 40 pressure contact portion 42, 42A reaction plate Part 44 Spring steel plate 46 Flat plate 48 Spring steel plate 50 Deformation promotion part

Claims (8)

A clearance formed between the end surfaces of the opposite ends of the road bridge and extending in a direction perpendicular to the axial direction of the road bridge. A water stop device for a road bridge expansion and contraction device that is arranged below the road bridge expansion and contraction device that absorbs the expansion and contraction of
The road bridge expansion and contraction device water stop device comprises a rubber sheet structure having a width extending in the axial direction of the road bridge and a length extending in a direction orthogonal to the axial direction,
The rubber sheet structure is
side plate portions provided at both ends in the width direction and capable of coming into contact with the end surfaces of the mutually opposing ends, and the space therebetween being open upward;
a lower plate portion extending over the entire longitudinal length of the road bridge expansion and contraction device in a direction orthogonal to the bridge axis direction and extending in the width direction to connect the lower ends of the side plate portions on both sides;
The rubber sheet structure is provided integrally with the side plate portions on both sides and extends in the width direction above the lower plate portion to connect the vertical intermediate portions of the side plate portions on both sides so that an external force is applied to the rubber sheet structure. It assumes a first shape extending on a plane in a state in which it is not closed, and is curvedly deformed from the first shape to the first shape while the side plate portions on both sides are in contact with the end faces of the mutually opposing end portions. A reaction force that causes the side plate portions on both sides to be pressed against the end surfaces of the mutually opposing end portions by the elastic force that tends to return, and the rubber sheet structure is fixed and installed between the mutually opposing end portions by the frictional force based on the pressure contact. and a plate portion,
When viewed in plan, both ends of the lower plate portion protrude outward from both ends of the reaction plate portion and the road bridge expansion and contraction device in a direction orthogonal to the bridge axis direction,
Standing walls connecting the side plate portions on both sides are erected at both ends of the lower plate portion in a direction orthogonal to the bridge axis direction,
Drainage pipe portions for discharging rainwater accumulated on the lower plate portion protrude downward at locations near both ends of the lower plate portion in a direction orthogonal to the bridge axis direction ,
In a state where no external force is applied to the rubber sheet structure, the portions of the side plate portions on both sides to which the reaction force plate portion is connected are curved in a convex shape toward the center in the width direction of the rubber sheet structure. In a state in which the side plate portions on both sides are in pressure contact with the end faces of the end portions facing each other of the elements constituting the road bridge, the elastic force of the reaction plate portion forms a flat plate shape parallel to the end faces of the end portions. Spring steel plates are embedded that press the upper and lower portions of the side plate portions of the above to the end faces of the mutually opposing ends,
A water stop device for a road bridge expansion and contraction device characterized by: A clearance formed between the end surfaces of the opposite ends of the road bridge and extending in a direction perpendicular to the axial direction of the road bridge. A water stop device for a road bridge expansion and contraction device that is arranged below the road bridge expansion and contraction device that absorbs the expansion and contraction of
The road bridge expansion and contraction device water stop device comprises a rubber sheet structure having a width extending in the axial direction of the road bridge and a length extending in a direction orthogonal to the axial direction,
The rubber sheet structure is
side plate portions provided at both ends in the width direction and capable of coming into contact with the end surfaces of the mutually opposing ends, and the space therebetween being open upward;
It is provided integrally with the side plate portions on both sides and extends over the entire length in the longitudinal direction of the road bridge expansion and contraction device in the direction orthogonal to the axial direction of the bridge, and extends in the width direction to extend above and below the side plate portions on both sides. A third shape is formed by connecting the intermediate portions in the direction and extending on the plane in a state where no external force is applied to the rubber sheet structure, and the side plate portions on both sides are in contact with the end surfaces of the mutually opposing ends. In this state, the side plate portions on both sides are pressed against the end surfaces of the end portions facing each other by the elastic force that bends and deforms from the third shape and tries to return to the third shape, so that the side plate portions are opposed to each other by the frictional force based on the pressure contact. and a reaction plate portion for fixing and installing the rubber sheet structure between the end portions,
When viewed from above, both ends of the reaction plate portion protrude outward from both ends of the road bridge expansion and contraction device in a direction orthogonal to the bridge axis direction,
Standing walls connecting the side plate portions on both sides are erected at both ends of the reaction plate portion in a direction orthogonal to the bridge axis direction,
Drainage pipe portions for discharging rainwater accumulated on the reaction plate portion protrude downward at locations near both ends of the reaction plate portion in a direction orthogonal to the bridge axis direction ,
In a state where no external force is applied to the rubber sheet structure, the portions of the side plate portions on both sides to which the reaction force plate portion is connected are curved in a convex shape toward the center in the width direction of the rubber sheet structure. In a state in which the side plate portions on both sides are in pressure contact with the end faces of the end portions facing each other of the elements constituting the road bridge, the elastic force of the reaction plate portion forms a flat plate shape parallel to the end faces of the end portions. Spring steel plates are embedded that press the upper and lower portions of the side plate portions of the above to the end faces of the mutually opposing ends,
A water stop device for a road bridge expansion and contraction device characterized by: The reaction force plate portion is provided over the entire length in the length direction of the rubber sheet structure,
The water stop device for a road bridge expansion and contraction device according to claim 1, characterized in that: A plurality of the reaction force plate portions are provided at intervals in the length direction of the rubber sheet structure,
The water stop device for a road bridge expansion and contraction device according to claim 1, characterized in that: A spring steel plate extending in the width direction, which is the bridge axis direction of the reaction plate portion, is embedded in the reaction plate portion,
The spring steel plate assumes a second shape extending along the first shape in a state in which no external force is applied to the rubber sheet structure, and the side plate portions on both sides are arranged on the end faces of the ends facing each other. The side plate portions on both sides are moved to the end faces of the end portions facing each other in cooperation with the reaction force plate portions due to the elastic force that bends and deforms from the second shape in the contact state and tries to return to the second shape. to press
A water stop device for a road bridge expansion joint according to any one of claims 1, 3 and 4 , characterized in that: The side plate portions on both sides are pressed against the end faces of the opposite ends of the elements constituting the road bridge at the locations of the side plate portions on both sides where the reaction plate portions are connected. Parallel rigid flat plates are embedded,
The water stop device for a road bridge expansion and contraction device according to any one of claims 1 to 4, characterized in that: When the side plate portions on both sides are displaced in a direction toward each other, the reaction force plate portion is provided with a deformation promoting portion that deforms more proactively than other portions and determines the direction of bending deformation,
The water stop device for a road bridge expansion and contraction device according to any one of claims 1 to 4, characterized in that: The outer surfaces of the side plate portions on both sides that are in pressure contact with the end surfaces of the end portions are formed with inclined surfaces that gradually move away from the end surfaces as they go upward.
The water stop device for a road bridge expansion and contraction device according to any one of claims 1 to 4, characterized in that:

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