JPH0141762Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a road joint expansion and contraction device constructed at a joint part of a road bridge.

(Prior Art) As an example of a road joint expansion/contraction device, there is a so-called face plate made of a steel face plate with a finger-shaped end face on the play side of the road joint, a web that supports this, and a lower plate fixed to the end of the deck slab. There is something called an inger joint.

Furthermore, as disclosed in Japanese Utility Model Publication No. 57-38407, there is a proposal to provide a road surface protection member on the back of a joint member such as a face plate, and to prevent abrasion of the concrete surface and damage to the joint member with this protection member. There is.

(Problem to be solved by the invention) However, the above-mentioned finger joint requires a lot of time and effort to manufacture, so it has to be relatively expensive, and at the same time, it is difficult to install, and the post-casting method cannot be used. There is. Additionally, if the concrete surface at the back of the face plate is worn out due to rutting, etc., there is a problem in that vehicle drivability is hindered by a linear step that occurs between the face plate and the concrete surface over the entire length of the road width. . Furthermore, in areas with snowfall, when the snowplow passes by, the scraper collides with the face plate due to the above-mentioned step, resulting in damage to the face plate.

On the other hand, when the above road surface protection member is provided,
Since the scraper moves over the protective member, it is possible to prevent the joint member from being damaged by the scraper, but since the protective member is provided separately,
There is a problem in that it takes time and effort to install and increases the cost.

That is, the object of the present invention is to provide an interlocking type road joint expansion and contraction device that can be easily manufactured without the need for comb-shaped processing like conventional face plates, and to provide a road joint expansion and contraction device that has good properties over a long period of time. The objective is to maintain vehicle drivability.

(Means for Solving the Problems) The present invention solves these problems by providing a pair of vertical plates that face each other with a space between them, and making each of these vertical plates intersect so that they protrude back and forth in the longitudinal direction of the road. By combining with a plurality of road surface members, an interlocking type road joint expansion/contraction device can be constructed, and its manufacturability, workability, and vehicle running performance can be improved.

In other words, the specific means for achieving this is as follows: Vertical plates extending in the longitudinal direction of the gap are supported at opposing road edges with a gap between the road joints, and the upper ends of the vertical plates are at the height of the road surface. The upper part of the vertical plate is formed with a plurality of fitting parts opening upward at intervals in the longitudinal direction of the vertical plate, and each fitting part has a horizontal part at the upper end. The front part of the joint member provided with is fitted, the horizontal part approximately corresponds to the road surface height, the front end of the joint member protrudes from the vertical board toward the clearance side, and the rear part of the joint member projects toward the back of the vertical board. , and the front end of each joint member protruding from one vertical plate faces between the front ends of the joint members protruding from the other vertical plate, and concrete is poured on the back of the vertical plate to the road surface height. This is a road joint expansion and contraction device characterized by:

(Function) In this road joint expansion/contraction device, the vertical plate serves as a template that prevents concrete from leaking into the gaps during concrete pouring, and also serves as a support member that supports the joint members, and also protects against impact when vehicles pass by. This serves as a protective plate to prevent the upper corner of the concrete section on the free space side from chipping.

As shown in FIG. 1, each joint member 6 is fitted across the vertical plate 7, so that finger-shaped or wave-shaped unevenness is formed on the play space 3 side. , the unevenness caused by the one joint member 6 and the vertical plate 7 and the unevenness caused by the opposing joint member 6 and the vertical plate 7 mesh with each other with a wave-shaped joint clearance.

On the other hand, the outline of the joint member (consisting of each joint member 6 and vertical plate 7) that appears on the road surface is as shown in Figure 2, and this outline A defines the boundary between the back of the vertical plate and the concrete 5 side. It will be configured. In this case, the rear part of the joint member 6 becomes a convex portion that protrudes from the vertical plate 7 toward the concrete 5, and the space between adjacent joint members 6 becomes a recess that is relatively recessed toward the opposite side. In other words, the boundary between the joint member and the concrete surface becomes uneven like the gap side.

Thus, the tire transition when the vehicle passes the road joint expansion device is as follows.

"Concrete surface → joint member → clearance → joint member → concrete surface" As shown in Fig. 2, the width W of the joint member 6 and the interval between adjacent joint members 6, 6 are determined from the width of the tire T of a general vehicle. If also set narrow, at the rear position of the joint member 6, part of the tire T in the width direction contacts the joint member 6 of the joint member, and at the position of the vertical plate 7, the entire width direction of the tire T contacts the joint member. (In addition, in FIG. 2, the symbol B represents the axis of the tire T.) Therefore, the tire T is connected to the joint member 6.
By passing through the concrete 5, wear on the upper surface of the concrete 5 is reduced, and the occurrence of a step at the boundary between the upper surface of the concrete 5 and the vertical plate 7 is suppressed.

Next, when the upper surface of the concrete 5 wears, a step C is generated at the boundary between the joint member and the concrete 5 side, as shown in FIG. The behavior of the tire T in this case is as follows.

"Concrete surface → joint member" First, a part of the tire T in the width direction rides on the joint member 6 of the joint member from the upper surface of the concrete 5.

That is, as shown in FIG. 4, a portion of the tire T rides on the joint member 6, and the remaining portion remains on the upper surface of the concrete 5.

Therefore, by causing only a portion of the tire T in the width direction to ride on the joint member 6 in this way, sudden upward movement of the entire tire T is prevented, and when the tire T rides on the joint member 6, the vehicle is prevented from receiving it. The impact will be small.

Next, when the tire T comes to the position of the vertical plate 7, the remaining part of the tire T will ride on the vertical plate 7, but since a part of the tire T has already ridden on the joint member 6, this remaining part will ride on the vertical plate 7. The impact when the vehicle runs over is also reduced because there is no sudden upward movement of the entire tire T.

On the other hand, if the joint member does not have the above-mentioned "unevenness" and the joint member extends linearly in the longitudinal direction of the gap, the entire width of the tire rides on the joint member at the same time, causing it to move upward rapidly. Therefore, the impact will be greater.

"Joint member→concrete surface" First, a portion of the tire T in the width direction descends from the joint member 6 of the joint member to the upper surface of the concrete 5.

In other words, a portion of the tire T falls onto the surface of the concrete 5, and the remaining portion remains on the joint member 6.

Therefore, sudden downward movement of the entire tire T is prevented, and part of the width direction of the tire T is covered with concrete 5.
The impact when landing on the top of the plane is small.

Next, when the tire T comes to the rear end of the joint member 6, the remainder of the tire T will fall from the joint member 6 onto the top surface of the concrete 5, but a part of the tire T has already fallen onto the top surface of the concrete 5. Therefore, the impact when the remaining part descends is also small because there is no sudden downward movement of the entire tire T.

(Effects of the invention) As described above, according to the invention, by combining a simple joint member with a horizontal portion at the upper end and a vertical plate, a corrugated joint clearance can be formed, and , the boundary between the joint member and the vertical plate and the concrete part behind it can also be made into a corrugated shape, and the horizontal part of the joint member can prevent abrasion of the road surface. In addition, since the joint member and the vertical plate are separate members, and the vertical plate can be used as a template, manufacturing costs are reduced and workability is improved. An excellent effect is obtained in that materials can be easily transported.

(Example) Hereinafter, an example of the present invention will be described based on the drawings.

In the road joint expansion and contraction device 1 shown in FIG.
2, 2 are floor plates that face each other with a gap 3 at the road joint, and have cutout steps 4, 4 formed therein;
A joint member consisting of a joint member 6 and a vertical plate 7 is fixed to the post-cast concrete portion 5 cast in the notch step portion 4 in a state connected to reinforcing bars such as dowel bars 8 and through bars 9.

As shown in FIG. 6, the joint member 6 has a plate surface 10.
It is a plate-shaped body made substantially vertical and elongated in the bridge length direction, and the upper end 11 is horizontal. A recess 15 is formed in the lower part of the joint member 6 at a predetermined distance l from the front end and opens downward in the center.
The front corner portion 15a of No. 5 is formed at a substantially right angle. Further, anchor bars 16, 16 protrude downward from the recess 15. The material of this joint member 6 is relatively high rigidity such as steel or plastic, the width W is about 15 to 35 mm, the overall length is about 150 to 500 mm, and the wall thickness t above the recess 15 is about 20 to 35 mm. 50
mm, and the length l is about 1/4 to 1/6 of the entire length, and the portion of this length l becomes a protrusion 13 to be described later. In addition, at the front end of the upper end 11 of the joint member 6,
For example, a known front downward slope may be formed on the upper surface of the front end of the face plate at the finger joint.

As shown in FIG. 7, the vertical plate 7 is a plate material with a thickness of about 12 mm made of the same material as the joint member 6.
The height is approximately 150 mm, and it extends in the longitudinal direction of the bridge 3 (in the case of a direct bridge, it will be in the road width direction).
At the top of the vertical board 7, fitting parts 17 that open upward are formed at intervals S in the road width direction, that is, in the longitudinal direction of the vertical board 7. The opening width of the fitting portion 17 is approximately equal to the width W of the joint member 6, that is, the width of the opening of the joint member 6 is approximately the same as the width W of the joint member 6.
The depth of the fitting portion 17 is set to match the thickness t of the joint member 6. Further, the distance S is approximately 15 to 200 mm. moreover,
Anchor bars 18 are attached to the vertical plate 7.

Therefore, at the road joint, a pair of vertical plates 7, 7 are installed opposite each other with a gap between them, with anchor reinforcements 18, 18 buried in the post-cast concrete parts 5, 5, respectively. The upper ends thereof are aligned with the road surface or are slightly lower than the road surface, and the fitting portions 17, 17 of both vertical plates 7, 7 alternately face the gap 3 in the road width direction. Each joint member 6 has a front corner 15a thereof.
is fitted into the fitting part 17 of the standing plate 7, and the front end is connected to the play space 3.
The rear part of each joint member 6 projects to the back of the vertical plate 7, and the anchor bar 16 of the joint member 6 is connected to the anchor bar 18, the through bar 9, and the dowel bar 8 of the vertical plate 7. It is buried in the post-cast concrete part 5 in this state.

In addition, in FIG. 5, 19 is a sealing member whose both sides are fixed to the opposing vertical plates 7, 7, and 20 is a pavement.

In the above structure, the upper end 11 of the joint member 6 is flush with the road surface, and between the protrusions 13 of each joint member 6 that protrude from one vertical plate 7 into the clearance 3, the joint protrudes from the other vertical plate 7. The joint clearance 21, which the protrusion 13 of the member 6 faces and is open to the road surface, has a wavy shape. Further, a joint member consisting of a joint member 6 and a vertical plate 7 and a post-cast concrete portion 5 are also provided.
The boundary line between the two roads also has a wavy shape on the road surface.

At the road joint, the joint clearance 21 is wave-shaped, so that the vehicle can move from the protrusion 13 of the joint member 6 that protrudes from one vertical plate 7 to the protrusion 13 of the joint member 6 that protrudes from the other vertical plate 7. 13 without substantially dropping into the joint clearance 21 with the tire always in contact with the road surface, resulting in good running performance. In addition, since the upper end 11 of the joint member 6 is exposed on the surface of the post-cast concrete part 5, vehicle tires often pass over the joint member 6, which reduces wear on the post-cast concrete part 5. The occurrence of a level difference at the boundary between the post-cast concrete part 5 and the vertical plate 7 is prevented, and even if a level difference occurs, the boundary between the joint member side and the concrete part 5 side by the joint member 6 and the vertical plate 7 is wave-shaped. Because of this, vehicle running performance is less likely to deteriorate. Further, the vertical plate 7 prevents the corner of the upper end of the concrete portion 5 on the side of the gap 3 from being chipped due to an impact when a vehicle passes by, thereby improving the durability of the road joint expansion/contraction device.

During construction, both vertical plates 7 are connected with a pair of vertical plates 7, 7 connected with a sealing member 19 in the center between the cutout steps 4, 4 formed at the ends of the opposing floor slabs 2, 2. , 7 are arranged opposite each other so that their upper ends coincide with the road surface, and anchor bars 18 protruding from each vertical plate 7 are connected to the dowel bars 8 by welding or the like. And vertical board 7
Fit the joint member 6 into the fitting part 17 of the joint member 6.
The joint member 6 is positioned by engaging its front corner 15a with the corner formed by the bottom surface of the fitting portion 17 and the front surface of the vertical plate 7. In this case, the upper end 11 of the joint member 6 simply fits into the fitting portion 17 of the vertical plate 7 so that the upper end 11 matches the road surface height. Next, the anchor bars 16 of the joint member 6 are connected to the through bars 9, the dowel bars 8, and the vertical plates 7.
After connecting to the anchor bars 18 by welding or the like, concrete is poured into each cutout step 4 to form a post-cast concrete section 5.

In the above-mentioned construction, since the vertical plate 7 serves as a formwork during concrete pouring, there is no need to provide a separate formwork, making the construction easy. In addition, with conventional finger joints, etc., concrete tends to be insufficiently placed on the lower surface of the face plate, but in the present invention, since the joint member 6 is vertically long, concrete can be poured from both sides of the joint member 6. The concrete will wrap around the lower surface of the joint member 6, and concrete placement will not be insufficient.

In the above embodiment, the anchor reinforcement 16 of the joint member 6
is directly connected to the dowel muscle 8, but the through bar 9
Alternatively, they may be connected indirectly via other separately provided reinforcing bars. Further, in the above embodiment, the recess 15 is formed in the joint member 6, but the recess 15 may not be provided, and the joint member may simply have a rectangular parallelepiped shape.

Next, modified examples of the joint member will be explained based on FIGS. 8 to 11.

The joint member 22 shown in FIG. 8 has a lower part approximately L.
It has a protruding part 23 formed by cutting it out in the shape of a letter, and the upper end has a horizontal part 24 on the front side and a horizontal part 2 on the rear side.
Continuing from 4, an inclined portion 25 that slopes downward toward the rear is formed. In this example, as shown in Figure 9,
Two joint members 2 are made from one rectangular plate.
2 and 22, it becomes possible to perform board cutting with less remaining material.

In this example, the horizontal portion 24 of the joint member 22 is flush with the road surface. Rutting occurs on the surface of the post-cast concrete section 5 above and behind the slope section 25,
Although this may lead to exposure of the slope 25, since the vehicle tires move smoothly on the slope 25,
There is no adverse effect on vehicle running performance. Also,
In road bridges constructed in snowy regions, snowplows often run, but even if the sloped portion 25 is exposed, the scraper of the snowplow will slide on the sloped portion 25, causing a large impact on the joint member 22. Therefore, the joint member 22 and furthermore the vertical plate 7 are not damaged by the scraper.

The joint member 26 shown in FIG. 10 is provided with a fitting groove 27 opening downward and having the same width as the thickness of the vertical plate 7 in its front part, and the horizontal part 28 and the inclined part 29 are shown in FIG. The configuration is similar to that shown. In this example, by fitting the fitting groove 27 into the vertical plate 7, the joint member 26 and the vertical plate 7 can be integrated.

The joint member 30 shown in FIG. 11 has a horizontal part 31 and an inclined part 32 similar to those shown in FIG. 8, and a recessed part 33 similar to that shown in FIGS. 5 and 6 is formed in the lower part. has been done. In this example, since the joint member 30 is provided with the recess 33 that opens downward, even if the scraper hits the slope 32, the joint member 30 is prevented from shifting forward by the concrete interposed in the recess 33. be done.

The inclined portion of the joint member may be sloped downward in a straight line, or may be sloped downward in a curved line with a predetermined curvature. Further, the distance between each joint member in the road width direction may be narrowed to be approximately the same as the width of the joint member, and preferably not wider than the tire width. When the inclined part is inclined linearly, the angle of inclination with respect to the horizontal part is 10 to 35 degrees, preferably 15 to 20 degrees.

Further, each joint member may be made to protrude alternately from the opposing vertical plates, or a plurality of joint members may be made to protrude alternately from the opposing vertical plates as shown in FIG. That is, in the figure, the vertical plates 40, 40 are arranged in the road width direction with a relatively narrow interval _S1 , and a pair of fitting parts 41, 41 are arranged with a relatively wide interval _S2 . The protrusions 43, 43 of the two joint members 42, 42 are shown alternately.

Incidentally, in the above example, the side surface (rising surface) of the fitting part of the vertical plate is perpendicular to the longitudinal direction of the vertical plate, but in the case of a diagonal bridge, the side surface of the fitting part is diagonal. .

In addition to the steel bridge in which the deck slab 2 is formed on the steel girder, the road bridge on which the road joint expansion/contraction device of the present invention is constructed includes:
Prestressed concrete girder bridges, reinforced concrete girder bridges, and steel slab bridges may also be used.

[Brief explanation of the drawing]

The drawings illustrate embodiments of the present invention, and FIG. 1 is a partially omitted plan view showing a road joint expansion and contraction device, and FIG.
The figure is a plan view showing the relationship between the outline of the joint member and the concrete part, Figure 3 is a perspective view showing the relationship between the joint member and the concrete part with a worn surface, and Figure 4 is a diagram showing the relationship between the joint member when the concrete surface is worn. A sectional view showing the relationship between the joint member and the tire,
Fig. 5 is a perspective view showing a cross section of the road joint part cut in the bridge length direction, Fig. 6 is a perspective view showing the joint member, Fig. 7 is a perspective view showing the vertical plate, and Fig. 8 is a perspective view showing the joint member and other parts. FIG. 9 is a plan view showing an example of cutting out the joint member shown in FIG. 8, FIG.
FIG. 1 is a plan view showing another example of the joint member, and FIG. 12 is a plan view showing another example of the road joint expansion/contraction device. 1... Road joint expansion and contraction device, 2... Floor slab, 3...
Play area, 5... Concrete section, 6, 22, 26...
...Joint member, 7... Vertical plate, 11... Upper end, 13,
23, 43... protruding part, 17, 41... fitting part,
24, 28, 31...Horizontal part.

Claims (1)

[Scope of utility model registration request] A vertical plate extending in the longitudinal direction of the gap is supported at each end of the road facing the gap at the road joint, and the upper end of the vertical plate substantially matches the road surface height. A plurality of fitting parts opening upward are formed in the upper part at intervals in the longitudinal direction of the vertical plate, and a front part of a joint member having a horizontal part at the upper end is fitted into each of the fitting parts. , the horizontal part approximately corresponds to the road surface height, the front end of the joint member protrudes from the vertical plate to the play side, the rear part of the joint member projects to the back of the vertical plate, and each joint protrudes from one of the vertical plates. A road joint expansion/contraction device characterized in that a front end of a joint member protruding from the other vertical plate faces between the front ends of the members, and concrete is cast on the back of the vertical plate up to the height of the road surface.