JP2002309507A - Expansion device for highway bridge - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an expansion device for a highway bridge having satisfactory water cut-off property and soundproofing property. SOLUTION: A gutter member 6 is provided below a vertical plate part 15 of each of a pair of joint members 5 having the vertical plate part 15 and a horizontal plate part 16, a lower part of the vertical plate part 15 is inserted into a groove of the gutter member 6, and a section between opposing vertical plate parts 15 of the joint member 5 is blocked by foaming filler 7 produced by pouring and foaming a foaming plastic material.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an extension device for a road bridge applied to a bridge or an elevated road.

[0002]

2. Description of the Related Art A finger joint is known as a telescopic device for a road bridge. This is shown in FIG.
As shown in the figure, opposed vertical plates (web plates) a
And one side comb-shaped horizontal plate (face plate) b welded on each vertical plate a, and the comb teeth are combined so as to mesh with each other with a play c. A gutter d is fixed to one vertical plate a, and a water guide plate e is fixed to the other vertical plate a. Rainwater falling from the play c is received by the gutter d. The water guide plate e functions to guide rainwater to the gutter d.

However, the above-described finger joint drainage structure has a problem that rainwater overflows from the gutter d and falls under the road bridge. This is because sand, pebbles, and other foreign matter on the bridge surface fall from the play c to the gutter d, and the drainage by the gutter d is prevented, or the gutter d becomes shallow due to accumulation of sand or the like on the gutter d. This is because the amount of rainwater exceeds the amount of water that can be drained.

Further, there is a problem that a foreign substance dropped from the play c becomes clogged between the opposed vertical plates a, thereby hindering the expansion and contraction of the expansion and contraction device.

[0005] The running noise of the vehicle is transmitted from the play c to the vertical plates a,
There is a problem that it is easy to be transmitted to the underpass through the space between "a" and the noise under the bridge is large.

In particular, in the case of a long bridge having a long span of the road bridge body, the play c is widened because the expansion and contraction allowance of the expansion and contraction device is required to be large, so that the above-mentioned problems of water leakage, noise, and inhibition of expansion and contraction are increased.

On the other hand, in place of the gutter, the space between the vertical plates is closed with a rubber seal material.
Because the space between the vertical plates is wide, a large amount of rubber is required.
There is a problem that the rubber seal material adhered to the vertical plate is peeled off due to aging or the like, thereby causing water leakage.

[0008]

SUMMARY OF THE INVENTION An object of the present invention is to make it possible to more reliably prevent water leakage between the vertical plates.

Another object of the present invention is to solve the above-mentioned problems of noise and obstruction of elasticity.

Another object of the present invention is to solve the problem without using a large amount of rubber sealing material.

[0011]

SUMMARY OF THE INVENTION According to the present invention, there is provided a vertical plate portion extending in the longitudinal direction of a seam of a road bridge. A pair of joint members having a horizontal plate portion formed in a shape, and a pair of gutter members provided respectively below the vertical plate portion of the joint member, wherein the gutter member has a thickness of the vertical plate portion. The groove has a wider width, and the lower portion of the vertical plate portion is inserted into the groove, and the pair of joint members face each other with the vertical plate portions facing each other and facing the other side of the horizontal plate portion. The protruding inner protrusion is combined so as to form a wavy play space between its tips that allows the road bridge body to expand and contract,
A stretchable device for a road bridge, wherein a space between the opposed vertical plate portions above the gutter member is closed by a sealing material.

Further, the present invention provides a pair of joint members each having a vertical plate portion extending in the longitudinal direction of a joint of a road bridge and a horizontal plate portion extending laterally from an upper end thereof, and a vertical plate portion of the joint member. A pair of gutter members respectively provided below, wherein the gutter member has a groove having a width wider than the thickness of the vertical plate portion, and the lower portion of the vertical plate portion is inserted into the groove, In the pair of joint members, the vertical plate portions face each other, the horizontal plate portions protrude toward the other side, and a play gap is formed between the distal ends thereof to allow the road bridge body to expand and contract. A telescopic device for a road bridge, wherein a space between the opposed vertical plate portions above a member is closed by a sealing material.

In these inventions, even if rainwater leaks from between the sealing material and the vertical plate portion due to aging of the sealing material, such rainwater is received by the gutter member and discharged.

When a foaming filler formed by injecting a foamable plastic material between the vertical plate portions and foaming the sealing material is used as the sealing material, rainwater is blocked by the foaming filler, thereby preventing water leakage under the bridge. You. Further, since the foamed filler prevents entry of sand and other foreign substances from the play gap into the space between the vertical plate portions, it is possible to prevent the elasticity of the expansion device from being reduced by such foreign substances. Further, the running noise of the automobile is absorbed or blocked by the foam filler, and is prevented from leaking under the bridge. Even if rainwater leaks from between the foam filler and the vertical plate due to aging of the foam filler, such rainwater is received by the gutter member and discharged. In addition, foamable plastic materials are less expensive than rubber seal materials.

Further, when the foamed filler is supported by the gutter member, even if the foamed filler is separated from the vertical plate portion, the foamed filler is prevented from falling under the bridge.

[0016]

As described above, according to the present invention, the space between the opposed vertical plate portions is closed by the sealing material, and the gutter member is provided below each vertical plate portion. Since the sealing material and the gutter member are double-sealed, even if rainwater leaks from between the sealing material and the vertical plate portion, the rainwater can be received by the gutter member and discharged.

In addition, according to the foam filler used as the sealing material, water leakage under the bridge, falling of foreign matter, and leakage of running noise are prevented by the foam filler, and the foam filler is separated from the vertical plate portion. Even so, rainwater that falls along the vertical plate is received by the gutter member and drained, which is advantageous for preventing water leakage under the bridge, reducing noise under the bridge, ensuring elasticity, and reducing costs. It will also be advantageous.

According to the foam filler supported by the gutter member, the foam filler can be prevented from falling.

[0019]

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

<Embodiment 1> This embodiment is shown in FIGS. In FIG. 1, 1 is a road bridge main body, 2
Reference numeral 3 denotes a road surface pavement, 3 denotes a play space of the road bridge main body 1, and 4 denotes a road bridge expansion / contraction device provided so as to close the play space 3. The telescopic device 4 for a road bridge includes a pair of joint members 5, 5, a pair of gutter members 6, 6, and a foam filler 7, and further includes an anchor 10
It has. Notch 1 at the end of the road bridge main body 1
1 and 11 are formed. The telescopic device 4 is configured such that the anchor 10 is disposed in the notch steps 11
And is appropriately installed, and is installed by casting a post-cast concrete 14.

The joint member 5 has a vertical plate portion 15 extending in the longitudinal direction of the seam of the road bridge, and a horizontal plate portion 16 projecting from both ends from the upper end of the vertical plate portion 15. As shown in FIG. 2, the horizontal plate portion 16 is formed in an uneven shape in which the tips of the projecting portions 16a and 16b on both sides enter and exit in the bridge length direction. The two joint members 5, 5 are provided such that the vertical plate portions 15, 15 face each other. Inner projecting portions 16a, 16a of the horizontal plate portions 16, 16 of the joint members 5, 5 projecting toward each other.
Are combined so as to form a wavy play space 17 between the ends thereof, which allows the road bridge bodies 1 and 1 to expand and contract.

A straight rod-shaped anchor 10 is provided on the back of the vertical plate portion 15.
Is welded, and the upper end of the L-shaped anchor 10 is welded to the lower surface of the outer projecting portion 16b of the horizontal plate portions 16, 16, and the horizontal portion of the L-shaped anchor 10 projects from the back of the vertical plate portion 15. .

The inner surface of the vertical plate portion 15 and the inner protruding portion 16a are connected by a rib 18. That is, the wheel load of the vehicle applied to the inner overhang portion 16a is transmitted to the vertical plate portion 15 via the rib 18, so that the inner overhang portion 16a
Has increased load-bearing strength.

The gutter member 6 has a groove having a width wider than the thickness of the vertical plate portion 15 formed by the bottom wall and the side walls rising from both sides thereof. The gutter member 6 is installed in the notch step portion 11, and the lower portion of the vertical plate portion 15 is inserted into the groove. The back surface of the vertical plate portion 15 contacts the inner surface of the outer wall of the gutter member 6, and the lower end of the vertical plate portion 15 contacts the bottom surface of the groove. Therefore, the bottom wall and the inner wall of the gutter member 6 have the vertical plate portion 15.
Overhangs from the inside. At the upper end of the inner wall of the gutter member 6, a barb 6a is formed to project toward the outer wall. The gutter member 6 and the vertical plate portion 15 are connected by welding or the like.

The foam filler 7 is formed by filling a foamable plastic material (for example, a foamable urethane material) between the vertical plate portions 15 and 15 and foaming the foamed material. Is provided with a padding 20 described later. The side surface of the foam filler 7 is in contact with (fixed to) the inner surface of the vertical plate 15. The lower part on both sides of the foam filler 7 enters a groove of the gutter member 6, and a drainage gap 6b is formed between the groove and the bottom of the groove.

The telescopic device 4 has a fixed length of, for example, about 1 m to 2 m in the longitudinal direction of the joint, and a plurality of telescopic devices 4 are connected in the longitudinal direction of the joint. FIG. 3 shows a connection structure between the telescopic devices 4 and 4.

That is, the foamed filler 7 is formed with a ridge 7a extending in the bridge length direction on the end face on the high side of the road bridge crossing slope, and a concave groove extending in the bridge length direction on the end face on the low side of the road bridge crossing slope. 7b is formed. The foam fillers 7, 7 adjacent to each other in the seam longitudinal direction are connected by fitting each other with the ridges 7a and the concave grooves 7b. In addition, a concave groove 7b may be formed on the end face of the foam filler 7 on the side of the road bridge with a high gradient, and the ridge 7a may be formed on the end face of the road bridge with a low gradient.

The side of the gutter member 6 where the road bridge crossing slope is higher projects outward than the joint member 5, and this protruding portion is located on the lower side of the road bridge crossing slope of the gutter member 6 of the telescopic device 4.
Is fitted so as to overlap from above. At the lower end of the road bridge crossing slope, a drain port is formed on the bottom surface of the gutter member 6, and a drain pipe 19 is connected to the drain port.

Next, a method for forming the foam filler 7 will be described. As shown in FIG. 4, the joint members 5 and 5 are assembled upside down. The gutter member 6 is connected to the vertical plate portion 15 in advance by welding or the like. The padding 20 is inserted between the vertical plate portions 6 and 6 to close the play space 17. That is, the padding 20 is formed of a sponge material, and as shown in FIG.
A cut 20a is formed in a portion corresponding to. This padding 20 is inserted between the vertical plate portions 6 and 6, and the cut 20
The padding 20 is pushed down so that the rib 18 fits into the inner overhang 16a. In that state, a foamable plastic material is injected between the vertical plate portions 15 and 15,
The foam filler 7 is formed by foaming chemically.

After the joint member 5 is installed at the joint of the road bridge, a foamable plastic material may be injected between the vertical plate portions 15 and 15 to cause foaming. In that case, the gutter member 6,
The injection / foaming is performed by closing the space between the six. In this case, the padding 20 is unnecessary.

Therefore, according to the expansion and contraction device 4, even if the rainwater enters the play gap 17, the rainwater is blocked by the foam filler filling the space between the vertical plates 15. Therefore, water leakage under the bridge is prevented. Sand and other foreign substances are also removed from the play space 17 by the vertical plate portions 15,1.
Penetration between the spaces 5 is prevented by the foam filler 7. Therefore, it is possible to prevent the elasticity of the elastic device 4 from being reduced by such foreign matter. Furthermore, since the vehicle running noise is absorbed or blocked by the foam filler 7, the sound leaking under the bridge becomes small.

When the foam filler 7 separates from the vertical plate portion 17, rainwater falls along the vertical plate portion 15, and the rainwater is received by the gutter member 6 and passes through the gap 6a to cross the road bridge. And is discharged from a drain port at the end through a drain pipe 19.

Since the foam filler 7 is supported by the gutter members 6, 6, even if the foam filler 7 is separated from the vertical plate portion 15,
Falling under the bridge is prevented.

<Embodiment 2> This embodiment is shown in FIG. 6 and FIG. The difference from the first embodiment is that the joint member 5 is not provided with a rib, and the water collecting pipe 21 extending in the seam longitudinal direction is fixed to the inner surface of the vertical plate portion 15. This is basically the same as the first embodiment. The water collecting pipe 21 may be formed by forming a large number of water collecting holes penetrating the pipe wall over the entire pipe, or a coil. A drain pipe is connected to the end of the water collection pipe 21 on the low side of the road bridge.

Therefore, in the case of this embodiment, the vertical plate portion 15
The rainwater flowing down and the rainwater impregnated in the foam filler 7 flows into the water collection pipe 21 and is discharged therefrom, so that the amount of rainwater flowing into the gutter member 6 is reduced, and the overflow of the rainwater from the gutter material 6 is reduced. This is advantageous in avoiding.

Next, a method for forming the foam filler 7 will be described. As shown in FIG. 7, the joint members 5 and 5 are assembled upside down, and a steel plate 22 having a thickness of about 1 mm is inserted between the vertical plate portions 15 and 15. The gutter member 6 is fixed to the vertical plate portion 15 in advance by welding or the like. The steel plate 22 has the inner overhang 16
a, thereby closing the play 17. In that state, a foamable plastic material is
Foaming filler 7 is formed by injecting foam between foams 15. Thereafter, the steel plate 22 is drawn out from between the vertical plate portions 15 in the seam longitudinal direction. A release agent such as oil is applied to the steel plate 22 in advance so that the foamed filler 7 does not adhere.

<Embodiment 3> In this embodiment, only the main parts are shown in FIG. That is, the first embodiment,
2, a water guiding gap 6b is formed between the bottom surface of the gutter member 6 and the foam filling material 7, but in the present embodiment, a water guiding coil 25 extending in the seam longitudinal direction instead of the gap 6b on the bottom surface of the gutter member 6.
The feature is that it is provided.

Accordingly, when rainwater flows down to the gutter member 7 from between the foam filler 7 and the vertical plate portion 15 or from a crack generated in the foam filler 7, the rainwater is transferred to the water guiding coil 25.
This leads to the lower side of the road bridge crossing slope.

Although the joint member 5 of the above embodiment has a concave-convex shape at the tip of the inner protruding portion 16a, it may extend linearly in the longitudinal direction of the joint. Similarly, the tip of the outer protrusion 16b may extend linearly. In some cases, there is no outer overhang.

[Brief description of the drawings]

FIG. 1 is a sectional view of a road bridge joint according to a first embodiment of the present invention.

FIG. 2 is a plan view of the road bridge joint.

FIG. 3 is an exemplary sectional view showing a connection structure between the extension devices according to the embodiment;

FIG. 4 is an exemplary sectional view for explaining the method of manufacturing the extension device of the embodiment;

FIG. 5 is an exemplary perspective view showing a part of the filling according to the embodiment in a partial cross section;

FIG. 6 is a sectional view of a road bridge joint according to a second embodiment of the present invention.

FIG. 7 is an exemplary sectional view for explaining the method of manufacturing the extension device of the embodiment;

FIG. 8 is a cross-sectional view showing a portion where a water guide coil according to Embodiment 3 of the present invention is installed.

FIG. 9 is a perspective view showing a conventional telescopic device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Road bridge main body 2 Bridge surface pavement 3 Play space of a road bridge main body 4 Road bridge expansion and contraction device 5 Joint member 6 Gutter member 7 Foam filler (sealant) 14 Post-cast concrete 15 Vertical plate portion 16 Horizontal plate portion 17 Play space

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 2D051 AA01 AA03 AA06 AC04 AF03 AF12 AG12 AG13 AH01 FA12 FA17 FA19 FA29 2D059 AA14 BB39 GG43 GG45

Claims (4)

[Claims] 1. A vertical plate portion extending in the longitudinal direction of a seam of a road bridge, and a horizontal plate portion projecting on both sides from an upper end thereof, and each of the projecting portions on both sides is formed in an uneven shape with a tip coming and going in the bridge length direction. And a pair of gutter members respectively provided below the vertical plate portion of the joint member, wherein the gutter member has a groove having a width wider than a plate thickness of the vertical plate portion. The lower portion of the vertical plate portion is inserted into the groove, and the pair of joint members are such that the respective vertical plate portions oppose each other, and the inner projecting portion protruding toward the other side of the horizontal plate portion is provided with the same. It is combined so as to form a wavy play space allowing the expansion and contraction of the road bridge body between the tips, and the space between the opposed vertical plate portions above the gutter member is closed by a sealing material. Telescopic device for road bridges. 2. A pair of joint members each having a vertical plate portion extending in the longitudinal direction of the seam of the road bridge and a horizontal plate portion projecting laterally from an upper end thereof, respectively provided below the vertical plate portion of the joint member. A pair of gutter members, wherein the gutter member has a groove having a width wider than a thickness of the vertical plate portion, and a lower portion of the vertical plate portion is inserted into the groove. The vertical plate portions are opposed to each other, the horizontal plate portions project toward the other side, and a play gap is formed between the distal ends thereof to allow expansion and contraction of the road bridge body. A telescopic device for a road bridge, wherein the space between the opposed vertical plate portions is closed by a sealing material. 3. The expansion and contraction device for a road bridge according to claim 1, wherein the sealing material is a foam filler formed by injecting a foamable plastic material between the vertical plate portions and foaming the same. A telescopic device for a road bridge. 4. The telescopic device for a road bridge according to claim 3, wherein the foam filler is supported by the gutter member.