JP2020180486A - Expansion part for road bridge and expansion device having the expansion part - Google Patents

Abstract

To provide an expansion part having a waterproof function and needing no connection work of a waterproof sheet from a lower part of an expansion device aiming at shortening of a construction period, and the expansion device having the expansion part.SOLUTION: A first expansion part includes: finger joints that each have a prescribed width and engage with each other to absorb the expansion and contraction of a road surface; a first stationary part that supports one of the finger joints; a second stationary part that supports the other of the finger joints; and a waterproof sheet that is provided so as to pass between the first stationary part and the second stationary part. The waterproof sheet is configured to be longer than the prescribed width by a surplus portion, with the surplus portion having a first element in a waterproof fastener.SELECTED DRAWING: Figure 1

Description

The present invention relates to a telescopic portion used for a road bridge and a telescopic device having the telescopic portion.

Many of the bridges in Japan were built during the postwar period of high economic miracle, and 50 years have already passed since the construction. Generally, the life of bridges and the like is said to be 50 years, and it is said that these bridges have already reached their lifespan in recent years.

Therefore, as a result of investigating the condition of those bridges, the bearings placed under the bridge girders deteriorated due to the rainwater flowing under the bridge girders in many bridges 50 years after construction. It turned out that some of them were damaged. It is believed that this was deteriorated and damaged due to rust and the like caused by rainwater flowing under the bridge girder. It is believed that such deterioration is significant, especially when rainwater contains a snow-melting agent.

Generally, in order to connect the bridge girder and the road, a conventional expansion / contraction device 500 for a road bridge called a finger joint is used. This is provided to absorb the expansion and contraction of the bridge girder B and the highway R as shown in FIG. 10, and is used for many bridges and the like. It has been found that the above-mentioned problems occur due to the infiltration of rainwater from the conventional finger joint 500.

Therefore, in order to prevent the ingress of rainwater, in Japanese Patent Application Laid-Open No. 2003-64613, the upper ends of the bridge gutters facing each other with a certain gutter space are connected flexibly via a finger joint. A gutter is arranged in the width direction of the bridge gutter between the steel webs fixed to the opposite end faces of the bridge girder on the lower surface side of the finger joint, and the upper ends of both side walls of the gutter are fixed to the upper end side of the opposite bridge girder web. In the expansion joint portion of the bridge, the structure of the expansion joint portion in the bridge is characterized in that the outer surface of the gutter is layered with a synthetic resin layer having elasticity and water stopping property connected to the facing surface of the web. It is disclosed.

This is to prevent deterioration of the bearing 600 arranged under the bridge girder B by preventing rainwater from seeping into the ground by having a synthetic resin layer having a water-stopping property. .. However, although such a structure can be applied in the case of new construction, it is not suitable for the replacement work of the expansion / contraction device for road bridges. This is due to the following reasons.

That is, for example, in the replacement work of the expansion / contraction device 500 for a road bridge, since the road is already in use, the road cannot be completely closed and the work cannot be performed. For example, overtaking with the traveling lane. On a two-lane road with one lane, replacement work will be carried out for each lane. In that case, if the expansion / contraction device for the overtaking lane is replaced after the expansion / contraction device for the driving lane is replaced, the synthetic resin layer having the water blocking property on the driving lane side and the synthetic resin layer having the water stopping property on the overtaking lane side are used. You need to make a connection. In this case, since the synthetic resin layer is covered with the finger joint, the synthetic resin layer cannot be brought into close contact with the synthetic resin layer from above, and the connection work cannot be performed so as to have waterproof property. Therefore, the synthetic resin layer is adhered from below.

In that case, since the bridge girder B is arranged at a high place from the ground, a high-altitude worker is required, and in the first place, at the connecting portion between the bridge girder B and the road R, such a synthetic resin layer is used. There may be no space below for connection work. That is, as shown in FIG. 10, the skeleton 620 and the pier 630 become obstacles, and the operator cannot go under the conventional telescopic device 500, and the connection work itself cannot be performed. Even if it is possible to dig in, it is not difficult to imagine that the work will be hindered and the work will be difficult.

In that case, it is necessary to arrange a synthetic resin layer having a waterproof function, then bring the seams into close contact with each other, and then install the finger joint body. In such a process, the construction period should be shortened. I can't.

Japanese Unexamined Patent Publication No. 2003-64613

The present invention has been made by paying attention to the above points, and the problem is that the telescopic portion has a waterproof function and does not need to connect the waterproof sheet from the lower part of the telescopic device in order to shorten the construction period. And to provide a telescopic device having the telescopic portion.

In order to solve the above-mentioned problems, the first telescopic portion of the first aspect meshes with each other to absorb the expansion and contraction of the road surface, and has a finger joint having a predetermined width and a first fixed portion that supports one of the finger joints. It has a second fixing portion that supports the other side of the finger joint, a waterproof sheet so as to pass between the first fixing portion and the second fixing portion, and the waterproof sheet has only a surplus portion from a predetermined width. It is long and has a first element in the waterproof fastener in the surplus portion.

Further, in the second aspect, the second expansion / contraction portion connected to the first expansion / contraction portion in the first aspect includes a second finger joint that meshes with each other to absorb the expansion and contraction of the road surface and has a predetermined second width. Then, pass between the third fixed portion that supports one of the second finger joints, the fourth fixed portion that supports the other of the second finger joints, the third fixed portion, and the fourth fixed portion. The other waterproof sheet is configured to be longer than the other predetermined width by a surplus portion, and the other surplus portion has a second element in the waterproof fastener.

Further, the expansion / contraction device of the third viewpoint includes the expansion / contraction portion of the first viewpoint and the second expansion / contraction portion of the second viewpoint, the first element in the first expansion / contraction portion and the second element in the second expansion / contraction portion. And, and further have a third finger joint to be arranged in the surplus portion in the first telescopic portion and the other surplus portion in the second telescopic portion.

Further, in the telescopic device of the fourth viewpoint, the waterproof sheet cradle is further arranged below the waterproof sheet and other waterproof sheets in the third viewpoint.

Since the present invention is configured and acts as described above, it has a waterproof function, and in order to shorten the construction period, it is not necessary to connect the waterproof sheet from the lower part of the telescopic device. And an expansion / contraction device having the expansion / contraction portion thereof can be provided.

It is a perspective view of a telescopic device. It is a perspective view of the state in which the 1st telescopic part, the 2nd telescopic part, and the 3rd finger joint of a telescopic device are separated. It is a perspective view of the state which connects the 1st expansion / contraction part and the 2nd expansion / contraction part in the expansion / contraction apparatus, and is going to arrange the 3rd finger joint. It is an exploded perspective view of the 1st telescopic part. A is a plan view of the first telescopic portion. B is a side view of the first telescopic portion. C is a right side view of the first telescopic portion. It is a state diagram in which a telescopic device is installed in a traveling lane. It is the figure of the state in which the construction of the traveling lane is completed, the other telescopic device is constructed in the overtaking lane, and each element is tightened in the state where the vehicle can pass. It is the figure of the state which arranged the 3rd joint in the surplus part and other surplus part. It is the figure of the state in which the construction for arranging the telescopic device is completed on the highway. It is a conceptual diagram which shows the state of a bridge girder and a road.

Hereinafter, this embodiment will be described with reference to the illustrated embodiment. The expansion / contraction device 10 of this embodiment has a first expansion / contraction portion 11, a second expansion / contraction portion 12, and a third finger joint 14. Here, the first expansion / contraction portion 11 and the second expansion / contraction portion 12 each have a surplus portion 45 and another surplus portion 45'described later, and the surplus portion 45 and the other surplus portion 45'are described later for waterproofing. By connecting with the fastener 50, while preventing water leakage, by arranging the above-mentioned third finger joint 14 in the space S (see FIG. 3) of the surplus portion 45 and the other surplus portion 45', for example, the road surface R It is arranged in the gap between the bridge girder B and the bridge girder B, and constitutes the expansion / contraction device 10 of the present embodiment that absorbs the expansion / contraction of the road surface R and the bridge girder B.

The first expansion / contraction portion 11 in the expansion / contraction device 10 of the present embodiment is a first to support one of a finger joint 20 arranged so as to mesh with each other in a comb-like shape in order to absorb expansion and contraction of the road surface and one of the finger joints 20. The waterproof sheet 40 is arranged so as to pass the fixing portion 30, the second fixing portion 130 for supporting the other side of the finger joint 20, the first fixing portion 30, and the second fixing portion 130. The waterproof sheet 40 is configured to be longer than the width H of the finger joint 20 by a surplus portion 45, and has a first element 51 in the waterproof fastener 50 at an end portion 46 of the surplus portion 45. One and the other will be described later.

The finger joint 20 has a first load support portion 25 that is arranged in a comb-teeth shape at a predetermined interval, and a second load support portion 125 that is arranged in a comb-teeth shape at a predetermined interval. Further, the first load support portion 25 includes a first finger portion 26 for arranging the second finger portion 126, which will be described later, so as to mesh with each other, and a first anchor portion 27 that is buried and fixed in the road surface. is there.

Further, the first fixing portion 30 is for fixing a plurality of the first load supporting portions 25 at regular intervals, and is a plate horizontally arranged to support the plurality of first anchor portions 27 from the lower part. A plurality of plate-shaped first upper fixing portions 31 arranged substantially perpendicular to the first lower fixing portion 31 so as to stand upright from the first lower fixing portion 31. It has a plate-shaped second lower portion fixing portion 33, which is horizontally arranged to support the first finger portion 26 of the above. By the first fixing portion 30, a plurality of first load supporting portions 25 can be arranged and fixed so as to have a plurality of intervals for the two opposing load supporting portions 125 to enter. Here, one of the above refers to the boundary portion K1 of each of the plurality of first finger portions 26 and the plurality of first anchor portions 27 in the plurality of first load support portions 25. The first upper fixing portion 32 in the first fixing portion 30 is arranged so as to penetrate each of the boundary portions K1. Further, the plate-shaped first upper fixing portion 32 prevents rainwater that has entered the plurality of first finger portions 26 from infiltrating into the first anchor portion 27 side.

The second load support portion 125 has a second finger portion 126 arranged so as to mesh with the first finger portion 26, and a second anchor portion 127 that grows and is fixed to the road surface. Further, the second fixing portion 130 is for fixing a plurality of the second load supporting portions 125 at a predetermined interval, and is a plate arranged horizontally to support the plurality of second anchor portions 127 from the lower part. It has a shaped third lower fixed portion 131 and a plate-shaped third upper fixed portion 132 arranged substantially perpendicular to the third lower fixed portion 131 so as to stand upright from the third lower fixed portion 131. It is a thing. By the second fixing portion 130, a plurality of third upper fixing portions 132 can be arranged so as to have a plurality of intervals for the first load supporting portions 25 facing each other to enter. Further, the second fixing portion 130 has a plate-shaped fourth lower fixing portion 133 which is horizontally arranged to support the plurality of second finger portions 126 from the lower part. Here, the other mentioned above refers to the second boundary portion K2 of each of the plurality of second finger portions 126 and the plurality of second anchor portions 127 in the plurality of second load support portions 125. The third upper fixing portion 132 in the second fixing portion 130 is arranged so as to penetrate each of the second boundary portions K2. Further, the plate-shaped third upper fixing portion 132 prevents rainwater that has entered the plurality of second finger portions 126 from infiltrating into the second anchor portion 127 side.

As described above, the finger joint 20 having the above configuration has a first fixing portion 30 and a second fixing portion 130 arranged on one side and the other side so as to face each other. Further, by arranging the waterproof sheet 40 so as to pass the first fixing portion 30 and the second fixing portion 130, rainwater entering through the gap between the first finger portion 26 and the second finger portion 126 can be taken. By storing it on the waterproof sheet 40, water intrusion into the basement is prevented. Further, the waterproof sheet 40 has a bellows portion 41 that allows expansion and contraction near the center thereof. Further, the waterproof sheet 40 is preferably a rubber sheet. Specifically, chloroprene rubber (CR) or ethylene propylene rubber (EPDM) is preferable.

The waterproof sheet 40 has a sufficient length in the vertical direction V so that the first fixing portion 30 and the second fixing portion 130 can be passed through. As described above, the rainwater invades from between the first finger portion 26 and the second finger portion 126, so that the infiltrated rainwater does not permeate underground. Since both the first anchor portion 27 and the second anchor portion 127 are buried and fixed in the road surface, there is no inundation from this portion.

Further, the waterproof sheet 40 is a finger joint in which a first load support portion 25 arranged so as to have a plurality of intervals and a second load support portion 125 arranged so as to have a plurality of intervals are arranged so as to mesh with each other. The surplus portion 45 is longer than the width H of 20. The surplus portion 45 constitutes a part of the waterproof sheet 40, and when connected to the second telescopic portion 12 as described later, a part of the space S for arranging the third finger joint 14 described later is provided. It is for composition.

The first element 51 of the waterproof fastener 50 is provided at the end 46 of the surplus portion 45 of the waterproof sheet 40. Specifically, as the waterproof fastener 50, it is preferable to use a waterproof fastener called Aquaseal manufactured by YKK Corporation. The waterproof fastener 50 also has a second element 52 in the waterproof fastener 50 at the end 46'of another surplus portion 45'in the second telescopic portion 12 described later. Therefore, the first element 51 and the second element 52 in the waterproof fastener 50 are respectively arranged at the end 46 of the surplus portion 45 in the telescopic portion 11, and the end of the other surplus portion 45'in the second telescopic portion 12. It is arranged in the portion 46', and they are integrated to form the waterproof fastener 50.

Further, below the waterproof sheet 40, a waterproof sheet cradle 70 is arranged so as to mesh with each other. It has a pair of meshing portions 71 and 72 as shown in FIG. 4, which are fixed to the first fixing portion 30 and the second fixing portion 130, respectively, via the tarpaulin 40. The waterproof sheet cradle 70 can be provided to prevent the waterproof sheet 40 from sagging due to its weight when rainwater stays on the waterproof sheet 40 and to protect the waterproof sheet 40. ..

Further, the second telescopic portion 12 for connecting to the first telescopic portion 11 has almost the same configuration as the first telescopic portion 11, and the difference is that it is shorter than the width H of the first telescopic portion 11. .. That is, the predetermined second width H'of the second finger joint 20'that constitutes the second telescopic portion 12 is shorter than the width H of the finger joint 20 that constitutes the first telescopic portion 11, and these are The number of the first load support portion 25 and the second load support portion 125 to be configured is smaller than that of the first expansion / contraction portion 11. Therefore, the same components as those of the first telescopic portion 11 may be designated by the same reference numerals and the description thereof may be omitted.

The second expansion / contraction portion 12 connected to the first expansion / contraction portion 11 is engaged with each other in a comb-teeth shape in order to absorb the expansion and contraction of the road surface, and has a predetermined second width H'and a second finger joint 20'. A third fixing portion 30'supporting one of the second finger joints 20', a fourth fixing portion 130'supporting the other of the second finger joint 20', and a third fixing portion 30'. It has another waterproof sheet 40'so as to pass between the fourth fixed portion 130', and the other waterproof sheet 40'is longer than the predetermined second width H'by the surplus portion 45'. It is configured and has a second element 52 in the waterproof fastener 50 in the other surplus portion 45'. As described above, the surplus portion 45 of the waterproof sheet 40 and the other surplus portion 45'of the other waterproof sheet 40'may have the same configuration.

The second finger joint 20'has a third fixing portion 30'on one side and a fourth fixing portion 130' on the other side so as to face each other. Further, another waterproof sheet 40'is arranged so as to pass between the third fixed portion 30'and the fourth fixed portion 130', and the other waterproof sheet 40'is the second finger joint 20'. It is configured to be longer than the predetermined second width H'by the surplus portion 45, and has the second element 52 in the waterproof fastener 50 at the end portion 46'of the other surplus portion 45'. In addition, as described above, one means the boundary portion K1 of each of the plurality of first finger portions 26 and the plurality of first anchor portions 27 in the plurality of first load support portions 25. Further, as described above, the other refers to the second boundary portion K2 of each of the plurality of second finger portions 126 and the plurality of second anchor portions 127 in the plurality of second load support portions 125.

The difference between the finger joint 20 in the expansion / contraction portion 11 and the second finger joint 20'in the second expansion / contraction portion 12 is the difference in the quantity of the first load support portion 25 and the second load support portion 125 as described above. For example, the telescopic portion 11 has a width of the traveling lane R1 of 5 meters, especially on the highway R, and the number of the first load supporting portion 25 and the second load supporting portion 125 at that time is 44, respectively. It is preferable to arrange it. On the other hand, in the second expansion / contraction portion 12, the number of the first load support portion 25 and the number of the second load support portion 125 are 40, respectively. When the second telescopic portion 12 is arranged in the overtaking lane R2, the surplus portion 45 in the telescopic portion 11 and the second telescopic portion in order to construct and open the traveling lane R1 first in the subsequent process, as described later, The width H of the finger joint 20 and the predetermined second width H'of the second finger joint 20'are different from each other in order to arrange the other surplus portion 45'in 12 in the overtaking lane R2. ing. Needless to say, the quantity can be increased or decreased according to the width of the road. Needless to say, the quantity can be increased or decreased in order to improve convenience during transportation.

Further, when the expansion / contraction portion 11 and the second expansion / contraction portion 12 are connected, a third finger joint 14 for arranging the surplus portion 45 and the other surplus portion 45'will be described. The third finger joint 14 has a small number of first load support portions 25 arranged at a predetermined first interval so as to mesh with each other, and a small number of second load support portions 125 arranged at a predetermined second interval. The fifth fixing portion 30 ″ that fixes the first load supporting portion 25 of the above with the predetermined first interval and the small number of the second load supporting portions 125 are fixed at the predetermined second interval. It has 6 fixing portions 130 ″ and. The small number referred to here means a quantity smaller than the above-mentioned plurality, and the surplus portion 45 and the other when the surplus portion 45 in the telescopic portion 11 and the other surplus portion 45'in the second telescopic portion 12 are connected. The number of the first load support portion 25 and the second load support portion 125 required for arranging the third finger joint 14 in the space S with the surplus portion 45'. At this time, the distance between the first load support portion 25 and the second load support portion 125 is the same as the distance between the finger joint 20 and the second finger joint 20'. Therefore, as shown in the figure, the expansion / contraction device 10 uniformly arranges the first load support portion 25, the third finger joint 14, and the second load support portion 125 (see FIG. 1).

In this embodiment, the number of the first load support portion 25 and the second load support portion 125 in the third finger joint 14 is preferably four, respectively. Therefore, four first loads are provided in the space S between the surplus portion 45 in the telescopic portion 11 and the surplus portion 45 in the second telescopic portion 12 and the other surplus portion 45'. The support portion 25 and the four second load support portions 125 can be arranged. The space S between the surplus portion 45 and the other surplus portion 45'is provided by the builder by pulling up a puller (not shown) of the first element 51 and the second element 52 in the waterproof fastener 50 to expand and contract. This is to secure the space S required for the work for connecting the waterproof sheet 40 in the portion 11 and the waterproof sheet 40 in the second telescopic portion 12. The difference between the first fixed portion 30, the third fixed portion 30 ′, and the fifth fixed portion 30 ″ is that the width H, the width H ′, and the width H ″ are different from each other. Similarly, the difference between the second fixed portion 130, the fourth fixed portion 130 ′, and the sixth fixed portion 130 ″ is that the width H, the width H ′, and the width H ″ are different from each other. ..

The construction method of the telescopic device 10 will be described. As shown in the figure, for example, in order to connect the bridge girder B and the highway R on the highway, the telescopic portion 11, the second telescopic portion 12, and the third finger joint 14 are constructed with the following configurations. In this case, for example, when the expressway R is a two-lane road, the traveling lane R1 and the traveling lane B1 of the bridge girder B are closed, and an expansion / contraction portion is formed at a portion connecting the bridge girder B and the expressway R in the traveling lane R1. 11 is placed. At this time, a groove having a predetermined size is provided in each of the traveling lane B1 and the traveling lane R1 of the bridge girder B, the expansion / contraction portion 11 is arranged in the groove portion, and the plurality of first anchor portions 27 in the expansion / contraction portion 11 are provided. It is filled with asphalt and fixed (see FIG. 6). As a result, the traveling lane B1 and the traveling lane R1 of the bridge girder B can travel. In this case, the surplus portion 45 in the telescopic portion 11 is arranged in the overtaking lane B2 and the overtaking lane R2 of the bridge girder B (arrangement step of the telescopic portion 11).

Next, the overtaking lane R2 on the highway R, which is a two-lane road, and the overtaking lane B2 of the bridge girder B are closed, and the second part connects the overtaking lane B2 and the bridge girder B and the highway R on the overtaking lane R2. The telescopic portion 12 is arranged. At this time, a groove having a predetermined size is provided in each of the bridge and the road portion, and the second telescopic portion 12 is arranged in the groove portion (arrangement step of the second telescopic portion 12).

Next, according to the process of arranging the expansion / contraction portion 11, the surplus portion 45 in the expansion / contraction portion 11 arranged in the overtaking lanes R2 and B2 and the second expansion / contraction portion 12 are arranged in the overtaking lanes R2 and B2. The other surplus portion 45'in the second expansion / contraction portion 12 is connected (connection step between the expansion / contraction portion 11 and the second expansion / contraction portion 12). Specifically, the builder places the first element 51 arranged at the end of the surplus portion 45 in the telescopic portion 11 and the second element arranged at the end of the other surplus portion 45'in the second telescopic portion 12. Connect with 52. Since this is a waterproof fastener 50, it can be connected by simply pulling a pull tab (not shown) of the waterproof fastener 50 (see FIG. 7). It is also preferable to attach a seal member 60 as shown in FIG. 3 to further enhance the waterproof property.

Next, the third finger joint 14 is arranged and fixed in the space S between the surplus portion 45 in the telescopic portion 11 arranged in the overtaking lanes B2 and R2 and the surplus portion 45'in the second telescopic portion 12 (third finger). Joint placement and fixing step) (see FIG. 8).

Next, the plurality of first anchor portions 27 and the plurality of second anchor portions 127 in the second telescopic portion 12 and the third finger joint 14 arranged in the overtaking lanes R2 and B2 are filled with asphalt and fixed (the first). 2 Telescopic part fixing step) (see FIG. 9). As the fixing method thereof, a conventional method using bolts can be used.

By performing the work in this way, the work from the upper part of the telescopic device 10 is sufficient, and it is not necessary to dig into the lower part of the waterproof sheet 40 to perform the connection work, so that the replacement work of the telescopic device 10 can be completed in an extremely short time. it can. Further, since it has a waterproof function, rainwater does not flow into the bearings 600 arranged below them.

10 Telescopic device 11 1st telescopic part 12 2nd telescopic part 14 3rd finger joint 20 Finger joint 20'2nd finger joint 25 1st load support part 125 2nd load support part 26 1st finger part 126 2nd finger part 27 1st anchor part 127 2nd anchor part 30 1st fixed part 30'3rd fixed part 130 2nd fixed part 130' 4th fixed part 40 Waterproof sheet 40'Other waterproof sheet 45 Surplus part 45'Other surplus part 50 Waterproof fastener 51 1st element 52 2nd element 70 Tarpaulin cradle S space

Claims (4)

Finger joints that engage with each other to absorb the expansion and contraction of the road surface and have a predetermined width,
A first fixing portion that supports one of the finger joints,
A second fixing portion that supports the other side of the finger joint and
It has a waterproof sheet so as to pass between the first fixing portion and the second fixing portion.
The waterproof sheet is configured to be longer than the predetermined width by a surplus portion.
A first telescopic part having a first element in a waterproof fastener in the surplus part. The second telescopic portion connected to the first telescopic portion according to claim 1 is
A second finger joint that meshes with each other to absorb the expansion and contraction of the road surface and has a predetermined second width is provided.
A third fixing portion that supports one of the second finger joints,
A fourth fixing portion that supports the other of the second finger joints,
It has another waterproof sheet so as to pass between the third fixing portion and the fourth fixing portion.
The other waterproof sheet is configured to be longer than the predetermined second width by the other surplus portion.
A second telescopic portion having a second element in the waterproof fastener in the other surplus portion. It has the first expansion / contraction portion according to claim 1 and the second expansion / contraction portion according to claim 2.
The first element in the first expansion / contraction portion and the second element in the second expansion / contraction portion are connected and arranged in the surplus portion in the first expansion / contraction portion and the other surplus portion in the second expansion / contraction portion. A telescopic device further having a third finger joint. The telescopic device according to claim 3, wherein a waterproof sheet cradle is further arranged below the waterproof sheet and other waterproof sheets.

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