JP6920176B2 - Reinforcement structure of station platform and reinforcement method of station platform - Google Patents

Description

The present invention relates to a reinforcement structure and a reinforcement method of an embankment type station platform, and relates to a technique for reinforcing a station platform having a structure in which an embankment is supported by a masonry wall in which masonry blocks are stacked.

The embankment-type station platform, which supports the embankment with a masonry-type masonry wall in which masonry blocks are stacked, is in service. Some of the existing station platforms have been in service for a long time, and some of them no longer meet the recent earthquake resistance standards.
There is concern that the masonry walls of such embankment-type station platforms will collapse due to external forces during a large-scale earthquake, causing the masonry to collapse or slip.
In order to reinforce such a masonry type masonry wall, a technique of fixing an elastic reinforcing net to the front surface of the masonry wall is known (see, for example, Patent Document 1).

Japanese Unexamined Patent Publication No. 2013-221371

However, the technique of Patent Document 1 is for preventing the masonry block from spreading when the masonry wall collapses, so that the collapsed masonry block does not spread from the station platform to the track side. However, there was a problem that it was not possible to prevent the masonry wall from collapsing and damaging the station platform itself.

An object of the present invention is to provide a station platform reinforcement structure and a station platform reinforcement method capable of preventing the station platform from being damaged.

In order to achieve the above object, one invention according to the present application is
It is a reinforcement structure of the station platform that reinforces the station platform in which the masonry walls on which the masonry blocks are stacked extend along the extending direction of the station platform on both sides of the station platform.
A plurality of core materials arranged so as to vertically penetrate a plurality of the masonry blocks in the masonry wall at predetermined intervals along the extending direction of the masonry wall.
At a predetermined height position of the masonry wall, annexes are provided over a plurality of the masonry blocks arranged along the extending direction of the masonry wall, and the annexes are fixed to the plurality of masonry blocks. Members and
A support member that holds the splicing member to the station platform so as to maintain a distance between the splicing members arranged on the masonry walls on both sides of the station platform.
I tried to prepare.

In the reinforced structure of the station platform having such a configuration, the masonry wall composed of a plurality of masonry blocks is integrated by a plurality of core materials and a pair of splicing members, and the masonry walls on both sides of the station platform sandwich the embankment. Since the space between the masonry walls is maintained by being restrained by the support member in the state, even if the earth pressure that causes the embankment to collapse on both sides of the platform acts on the masonry wall, the masonry wall should resist the earth pressure. Can be done.
In other words, with this station platform reinforcement structure, for example, even if a large-scale earthquake occurs, the embankment can be maintained in a state of being supported by the masonry walls on both sides of the platform, thus preventing the station platform from being damaged. Can be done.

Also, preferably
The support member is arranged in a direction orthogonal to the extending direction of the station platform.
Both ends of the support member are connected to the splicing member arranged on the masonry wall on both sides of the station platform.

By doing so, the distance between the masonry walls on both sides of the platform can be more preferably maintained, and the state in which the embankment is supported by the masonry walls can be more preferably maintained.

Also, preferably
The core material is made to penetrate a plurality of the masonry blocks up and down in a posture in which the lower end portion thereof is inclined toward the center side of the station platform.

If the core material that penetrates multiple masonry blocks up and down is installed with its lower end tilted toward the embankment area on the center side of the station platform, the earth will collapse on both sides of the platform. When pressure acts on the masonry wall, the pull-out resistance of the core material becomes suitably resistant to earth pressure.
If the pull-out resistance of the core material arranged in an inclined posture can appropriately resist the earth pressure, the state in which the masonry walls on both sides of the station platform support the embankment can be preferably maintained. ..

Also, preferably
On the outer surface of the masonry wall, a long holding member attached over a plurality of masonry blocks arranged along the extending direction of the masonry wall is fixedly attached to each step on which the masonry block is stacked. To do.

By fixing a long holding member on the outer surface of the masonry wall, it is possible to prevent the masonry block of the masonry wall from protruding, and it is possible to firmly integrate the masonry wall composed of a plurality of masonry blocks. , The state where the masonry walls on both sides of the station platform support the embankment can be preferably maintained.

In addition, other inventions according to this application
The existing masonry wall on which masonry blocks are piled up extends along the extending direction of the station platform, and the masonry wall is a method of reinforcing the station platform to reinforce the station platform supporting the embankment.
A step of arranging a plurality of core materials that vertically penetrate a plurality of the masonry blocks in the masonry wall at predetermined intervals along the extending direction of the masonry wall.
At a predetermined height position of the masonry wall, a splicing member is spliced over a plurality of the masonry blocks arranged along the extending direction of the masonry wall, and a plurality of masonry blocks are attached to the splicing plate, respectively. The process of sticking and
A step of connecting the splicing member arranged on the masonry wall to a stable portion of the embankment so that the masonry wall maintains the state of supporting the embankment.
I tried to prepare.

According to the method for reinforcing a station platform having such a configuration, a masonry wall composed of a plurality of masonry blocks is integrated by a plurality of core materials and a pair of splicing members, and a state in which the embankment is supported by the masonry wall is suitably maintained. Therefore, even if a large-scale earthquake occurs, it is possible to prevent the station platform from being damaged.

According to the present invention, it is possible to prevent the station platform from being damaged.

It is sectional drawing (a) and top view (b) which show the reinforcement structure of the station platform of Embodiment 1. FIG. It is sectional drawing (a) and top view (b) which show the modification of the reinforcement structure of the station platform of Embodiment 1. FIG. 2 is a cross-sectional view (a) and a top view (b) showing a reinforcing structure of the station platform of the second embodiment. It is sectional drawing (a) and top view (b) which show the modification of the reinforcement structure of the station platform of Embodiment 2. It is sectional drawing (a) and top view (b) which show the reinforcement structure of the station platform of Embodiment 3. FIG. It is sectional drawing (a) and top view (b) which show the reinforcement structure of the station platform of Embodiment 4. FIG. 5A is a cross-sectional view (a), a top view (b), and a side view (c) showing a reinforcing structure of the station platform of the fifth embodiment. It is sectional drawing (a), top view (b), and side view (c) which show the modification of the reinforcement structure of the station platform of Embodiment 5.

Hereinafter, embodiments of the station platform reinforcement structure and the station platform reinforcement method according to the present invention will be described in detail with reference to the drawings. However, although the embodiments described below are provided with various technically preferable limitations for carrying out the present invention, the scope of the present invention is not limited to the following embodiments and illustrated examples.

In the present embodiment, the existing masonry wall 2 in which a plurality of masonry blocks 1 are stacked is an embankment type station platform having a structure in which the embankment 3 is supported, and the extension direction of the station platform is on both sides of the station platform. A case of reinforcing a station platform on which a masonry wall 2 is extended along the above will be described as an example.
The station platform here is an island-style station platform where trains arrive and depart on both sides of the platform with the masonry wall 2, and the masonry wall 2 of the station platform has a plurality of masonry blocks 1 so that its outer surface faces a vertical surface. It is piled up and formed.

(Embodiment 1)
As shown in FIGS. 1A and 1B, for example, the station platform reinforcement structure 100 of the present embodiment has a plurality of masonry blocks on the masonry wall 2 at predetermined intervals along the extending direction of the masonry wall 2. A plurality of core members 10 arranged so as to penetrate 1 vertically, and a plurality of masonry blocks 1 arranged along the extending direction of the masonry wall 2 at a predetermined height position of the masonry wall 2. The distance between the splicing member 20 which is spliced and fixed to each of the plurality of masonry blocks 1 and the splicing member 20 arranged on the masonry walls 2 on both sides of the station platform is maintained. It is provided with a support member 30 or the like that connects the splicing member 20 to the station platform.
The uppermost masonry block 1 in the masonry wall 2 is called "Kasaishi" and is piled up so as to project from the station platform to the track side.

The core material 10 is, for example, a steel rod, and the lower end portion penetrating the masonry block 1 is embedded in the ground.
In the present embodiment, the core materials 10 are arranged at intervals of every other masonry block 1 along the extending direction of the masonry wall 2.
Even if the core material 10 is inserted and arranged in a through hole formed in the masonry wall 2 (masonry block 1), the core material 10 is screwed into the masonry wall 2 (masonry block 1) while forming the through hole. It may be arranged in.

The splicing member 20 is, for example, a steel angle member having an L-shaped cross section, and is fixed to the inner wall surface of the uppermost masonry block 1 in the masonry wall 2 by using an anchor 21.
In particular, the splicing member 20 is fixed to each of the plurality of masonry blocks 1 on the uppermost stage by anchors 21. That is, all of the plurality of masonry blocks 1 at the uppermost stage of the masonry wall 2 are fixed to the splicing member 20.

The support member 30 is, for example, a tie rod, and both ends thereof are connected to the splicing members 20 on both sides of the station platform.
In particular, the support member 30 is arranged in a direction orthogonal to the extending direction of the station platform, and both ends thereof are connected to the splicing members 20 arranged on the masonry walls 2 on both sides of the station platform. There is.
The support member 30 supports the paired splicing members 20 so as to maintain a constant distance from each other, and holds the splicing members 20 so that the distance between the splicing members 20 does not change. In other words, the support member 30 maintains a state in which the masonry wall 2 supports the embankment 3 by connecting the splicing member 20 arranged on the masonry wall 2 to the station platform.

In the station platform reinforcement structure 100 having the above configuration, for example, after arranging a plurality of core members 10 that vertically penetrate a plurality of masonry blocks 1 in the masonry wall 2, a part of the embankment 3 on the upper surface side of the platform is formed. By digging up, a splicing member 20 having a length extending over a plurality of masonry blocks 1 on the uppermost stage is fixed to the masonry wall 2, and perpendicular to the splicing members 20 arranged on the masonry walls 2 on both sides of the station platform. It can be constructed by connecting both ends of the support member 30.
Here, after installing the splicing member 20 and the support member 30, the embankment 3 is backfilled, and the asphalt pavement surface 4 covering the embankment 3 is formed on the upper surface of the platform.

In such a station platform reinforcement structure 100, a masonry wall 2 composed of a plurality of masonry blocks 1 is integrated by a plurality of core members 10 and a pair of splicing members 20, and masonry walls 2 on both sides of the station platform are integrated. Since the wall 2 is restrained by the support member 30 with the embankment 3 sandwiched between them, even if the earth pressure such that the embankment 3 collapses on both sides of the platform acts on the masonry wall 2, the masonry wall 2 resists the earth pressure. can do.
That is, if the reinforcement structure 100 of the station platform of the first embodiment is constructed in the existing station platform, for example, even if a large-scale earthquake occurs, the masonry walls 2 on both sides of the platform will not collapse and the station platform will be damaged. It won't happen.
As described above, the reinforcement structure 100 of the station platform of the present embodiment can prevent the station platform from being damaged.

Further, the reinforcement structure 100 of the station platform of the first embodiment does not require the work of entering the track under the platform and can be constructed by the construction on the upper surface of the platform. Not limited to nighttime.
As a result, the construction period can be shortened and the construction cost can be reduced.

If the embankment 3, which is the foundation of the station platform, is highly stable, the support member 30 may not be installed, for example, as shown in FIGS. 2 (a) and 2 (b).
Even with such a station platform reinforcement structure 100, it is possible to prevent the station platform from being damaged.

(Embodiment 2)
Next, the second embodiment of the station platform reinforcement structure and the station platform reinforcement method according to the present invention will be described. The same parts as those in the first embodiment are designated by the same reference numerals, and only different parts will be described.

As shown in FIGS. 3A and 3B, for example, the station platform reinforcement structure 100 of the second embodiment moves a plurality of masonry blocks 1 up and down in an inclined posture with its lower end toward the center side of the station platform. It is provided with a core material 10 penetrating the platform.

If the core material 10 was installed with its lower end inclined toward the area of the embankment 3 on the center side of the station platform, earth pressure such that the embankment 3 collapsed on both sides of the platform acted on the masonry wall 2. In this case, the pull-out resistance force of the core material 10 becomes suitable for resisting earth pressure.
If the pull-out resistance force of the core material 10 arranged in the inclined posture can appropriately resist the earth pressure, the masonry wall 2 will not collapse and the station platform will not be damaged.

That is, if the station platform reinforcement structure 100 of the second embodiment is used, for example, even if a large-scale earthquake occurs, the masonry walls 2 on both sides of the platform will not collapse, so that the station platform can be prevented from being damaged. can.

Further, the reinforcement structure 100 of the station platform of the second embodiment does not require the work of entering the track under the platform, but the work of installing the core material 10 in an inclined posture toward the center side of the station platform. As for the above, since a part of the core material 10 may protrude from the station platform to the track side, it is preferable to perform it at night when there is no train operation.

If the embankment 3, which is the foundation of the station platform, is highly stable, the support member 30 may not be installed, for example, as shown in FIGS. 4A and 4B.
Even with such a station platform reinforcement structure 100, it is possible to prevent the station platform from being damaged.

(Embodiment 3)
Next, the third embodiment of the station platform reinforcement structure and the station platform reinforcement method according to the present invention will be described. The same parts as those in the first embodiment are designated by the same reference numerals, and only different parts will be described.

In the station platform reinforcement structure 100 of the third embodiment, for example, as shown in FIGS. 5A and 5B, the splicing members 20 arranged on the masonry walls 2 on both sides of the station platform are connected to the station platform. It includes a first support member 31 and a second support member 32 that are stopped.

The first support member 31 is, for example, a tie rod, one end of which is connected to the splicing member 20 and the other end of which is connected to the second support member 32.
The first support member 31 is arranged in a direction orthogonal to the extending direction of the station platform, and is connected perpendicularly to the splicing member 20.

The second support member 32 is, for example, a weight member such as a large concrete block, and the other end of the first support member 31 is connected and embedded in the embankment 3.
The second support member 32 is not limited to a weight member, but may be a pile member driven into the embankment 3.

Even with such a station platform reinforcement structure 100, for example, in the event of a large-scale earthquake, the masonry walls 2 on both sides of the platform will not collapse and the station platform will not be damaged.
That is, even with the reinforcement structure 100 of the station platform of the third embodiment, it is possible to prevent the station platform from being damaged.

Further, the reinforcement structure 100 of the station platform of the third embodiment does not require the work of entering the track under the platform and can be constructed by the construction on the upper surface of the platform. Not limited to nighttime.
As a result, the construction period can be shortened and the construction cost can be reduced.

(Embodiment 4)
Next, the fourth embodiment of the station platform reinforcement structure and the station platform reinforcement method according to the present invention will be described. The same parts as those in the first embodiment are designated by the same reference numerals, and only different parts will be described.

In the station platform reinforcement structure 100 of the fourth embodiment, for example, as shown in FIGS. 6A and 6B, the splicing members 20 arranged on the masonry walls 2 on both sides of the station platform are connected to the station platform. The support member 30 for stopping is embedded in the embankment 3 in an inclined posture with the lower end thereof facing the center side of the station platform.
The support member 30 here is, for example, a steel rod, and the lower end portion thereof is installed in an inclined posture toward the area of the embankment 3 on the center side of the platform, and the upper end portion thereof is connected to the splicing member 20.

In this way, if the support member 30 whose lower end is inclined toward the center side of the station platform is embedded in the embankment 3 and the upper end thereof is connected to the splicing member 20, the embankment 3 is on both sides of the platform. When a collapsing earth pressure acts on the masonry wall 2, the pull-out resistance force of the support member 30 becomes suitably resistant to the earth pressure.
If the pull-out resistance of the support member 30 that connects the splicing member 20 arranged on the masonry wall 2 to the station platform can appropriately resist the earth pressure, the masonry walls 2 on both sides of the station platform 2 It becomes easier to maintain the state of supporting the embankment 3.

Even with such a station platform reinforcement structure 100, for example, in the event of a large-scale earthquake, the masonry walls 2 on both sides of the platform will not collapse and the station platform will not be damaged.
That is, even with the reinforcement structure 100 of the station platform of the fourth embodiment, it is possible to prevent the station platform from being damaged.

Further, the station platform reinforcement structure 100 of the fourth embodiment does not require the work of entering the track under the platform, but the work of installing the support member 30 in an inclined posture toward the center side of the station platform. Since a part of the support member 30 may protrude from the station platform to the track side, it is preferable to perform the support member 30 at night when there is no train operation.

(Embodiment 5)
Next, the fifth embodiment of the station platform reinforcement structure and the station platform reinforcement method according to the present invention will be described. The same parts as those in the first embodiment are designated by the same reference numerals, and only different parts will be described.

In the reinforcement structure 100 of the station platform of the fifth embodiment, for example, as shown in FIGS. A long holding member 40 is fixedly attached over a plurality of masonry blocks 1 arranged along the extending direction of the above.
In the present embodiment, since the splicing member 20 is fixedly attached to the uppermost masonry block 1 corresponding to the fifth step from the bottom, the long holding member 40 is attached to the masonry block 1 from the lower to the fourth step. I tried to fix it.

The long pressing member 40 is, for example, a steel angle member having an L-shaped cross section, and is fixed to the outer surface of the masonry wall 2 (masonry block 1) by using an anchor 41.
The long holding member 40 has a function of preventing the masonry block 1 of the masonry wall 2 from protruding, and also has a function of firmly integrating the masonry wall 2 composed of a plurality of masonry blocks 1. ing.
The long holding member 40 is of a size that the uppermost masonry block 1 (caps stone) of the masonry wall 2 does not protrude to the track side from the portion protruding from the station platform to the track side.

Even with such a station platform reinforcement structure 100, for example, in the event of a large-scale earthquake, the masonry walls 2 on both sides of the platform will not collapse and the station platform will not be damaged.
That is, even with the reinforcement structure 100 of the station platform of the fifth embodiment, it is possible to prevent the station platform from being damaged.

If the embankment 3, which is the foundation of the station platform, is highly stable, the support member 30 may not be installed, for example, as shown in FIGS. 8A and 8B.
In the present embodiment, the long holding member 40 is fixed to the outer surface of the masonry block 1 from the bottom to the third step by using an anchor 41, and the masonry block 1 on the fourth step from the bottom and the masonry block 1 on the top step ( Anchor 21 was used to firmly fix the splicing member 20 to the jaw-shaped portion between the capstone).
Even with such a station platform reinforcement structure 100, the masonry wall 2 composed of a plurality of masonry blocks 1 can be firmly integrated, and the station platform can be prevented from being damaged.

As described above, if the station platform reinforcement structure 100 of the first to fifth embodiments is constructed on the existing station platform, the station platform can be prevented from being damaged, so that even if a large-scale earthquake occurs, the station platform can be prevented from being damaged. The station platform can be reinforced so that the masonry walls 2 on both sides of the platform do not collapse.

In the above embodiment, the case of reinforcing an island-type station platform on which trains arrive and depart on both sides of the platform having the masonry wall 2 has been described as an example, but the present invention is not limited to this. For example, the present invention may be applied to reinforce a one-sided platform having a masonry wall 2 in a relative platform where trains arrive and depart on one side of the platform.

When the present invention is applied to reinforce a single-sided platform having a masonry wall 2, the techniques of the above-described third embodiment (see FIG. 5) and the fourth embodiment (see FIG. 6) may be used.
When reinforcing a single-sided platform, for example, after arranging a plurality of core members 10 that vertically penetrate a plurality of masonry blocks 1 in the masonry wall 2, a part of the embankment 3 on the upper surface side of the platform is dug up to form the uppermost stage. A splicing member 20 having a length extending over a plurality of masonry blocks 1 is fixed to the masonry wall 2 and arranged on the masonry wall 2 so as to maintain a state in which the masonry wall 2 supports the embankment 3. By installing the first support member 31 and the second support member 32 in order to connect the splicing member 20 to the stable portion of the embankment 3 of the station platform, the station shown in FIGS. 5 (a) and 5 (b). The reinforcement structure 100 of the platform can be constructed.

In addition, it goes without saying that the specific detailed structure and the like can be changed as appropriate.

1 Masonry block 2 Masonry wall 3 Embankment 4 Asphalt pavement surface 10 Core material 20 Splicing member 21 Anchor 30 Support member 31 First support member 32 Second support member 40 Long holding member 41 Anchor 100 Station platform reinforcement structure

Claims (5)

It is a reinforcement structure of the station platform that reinforces the station platform in which the masonry walls on which the masonry blocks are stacked extend along the extending direction of the station platform on both sides of the station platform.
A plurality of core materials arranged so as to vertically penetrate a plurality of the masonry blocks in the masonry wall at predetermined intervals along the extending direction of the masonry wall.
At a predetermined height position of the masonry wall, annexes are provided over a plurality of the masonry blocks arranged along the extending direction of the masonry wall, and the annexes are fixed to the plurality of masonry blocks. Members and
A support member that holds the splicing member to the station platform so as to maintain a distance between the splicing members arranged on the masonry walls on both sides of the station platform.
Reinforcement structure of the station platform, which is characterized by being equipped with. The support member is arranged in a direction orthogonal to the extending direction of the station platform.
The reinforcing structure for a station platform according to claim 1, wherein both ends of the support member are connected to the splicing members arranged on the masonry walls on both sides of the station platform. The station platform according to claim 1 or 2, wherein the core material penetrates a plurality of the masonry blocks up and down in a posture in which the lower end portion thereof is inclined toward the center side of the station platform. Reinforced structure. On the outer surface of the masonry wall, a long holding member attached over a plurality of masonry blocks arranged along the extending direction of the masonry wall is fixedly attached to each step on which the masonry block is stacked. The reinforcing structure of the station platform according to any one of claims 1 to 3, wherein the station platform is reinforced. The existing masonry wall on which masonry blocks are piled up extends along the extending direction of the station platform, and the masonry wall is a method of reinforcing the station platform to reinforce the station platform supporting the embankment.
A step of arranging a plurality of core materials that vertically penetrate a plurality of the masonry blocks in the masonry wall at predetermined intervals along the extending direction of the masonry wall.
At a predetermined height position of the masonry wall, a splicing member is spliced over a plurality of the masonry blocks arranged along the extending direction of the masonry wall, and a plurality of masonry blocks are attached to the splicing plate, respectively. The process of sticking and
A step of connecting the splicing member arranged on the masonry wall to a stable portion of the embankment so that the masonry wall maintains the state of supporting the embankment.
A method of reinforcing a station platform, which is characterized by being equipped with.

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