Reinforcement structure of station platform

Abstract

To provide a reinforcement structure for a station platform capable of suitably reinforcing the station platform when there is a structure on a masonry wall of the station platform.SOLUTION: In a reinforcement structure 100 for a station platform, the rigidity of a masonry wall 2 supporting embankment 3 is enhanced by integrating stacked masonry blocks 1 using reinforcement coating 5 made of resin and anchor members 4 and integrating the stacked masonry blocks 1 through pressure welding with weight of platform door facilities D. Thereby, earthquake resistance of the station platform is improved by enhancing the rigidity of the masonry wall 2 supporting the embankment 3. Thus, the reinforcement structure 100 for the station platform can suitably reinforce a station platform even where the platform door facilities D have been installed.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present invention relates to a reinforcing structure for 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 formed by stacking masonry blocks.

Background Art

[0002] There is in use an embankment-type station platform in which an embankment is supported by an assembled masonry wall formed by stacking masonry blocks. Some of the existing station platforms have been in service for a long time, and some do not meet the recent earthquake resistance standards. There is concern that such a masonry wall of an embankment-type station platform may collapse due to external forces during a large-scale earthquake, causing rockfall or sliding collapse. To reinforce such an assembled masonry wall, a technique is known in which a core material penetrating from the uppermost masonry block to the lowermost masonry block in the masonry wall is disposed to integrate a plurality of masonry blocks (see, for example, Patent Document 1).

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] However, when reinforcing a station platform on which a platform door is installed on a masonry wall, it is not possible to dispose a core material penetrating a plurality of masonry blocks vertically unless the platform door is removed once. Therefore, it has been difficult to reinforce such a station platform by the technique of Patent Document 1. In addition, since the work of reinforcing the station platform is restricted, such as being carried out within a limited time from the last train to the first train, construction including the complicated work of removing and installing the platform door is not preferable.

[0005] The object of the present invention is to provide a station platform reinforcement structure that can suitably reinforce a station platform when there is a structure on top of the stone wall of the station platform. [Means for solving the problem]

[0006] To achieve the above objective, this invention is: A stone wall, constructed by stacking multiple stone blocks, extends along the direction of the station platform, and this stone wall supports the inner embankment, providing a reinforcement structure for the station platform. A certain heavy object is installed on the aforementioned station platform. At least the lowest layer of stone blocks in the aforementioned stone wall are buried below ground level. In the aforementioned stone wall, an anchor member is provided in the stone blocks that are exposed above ground level, penetrating from that stone block to the lowest stone block. The outer surface of the aforementioned stone wall above ground level is provided with a reinforcing resin coating that adheres closely to the stone blocks above ground level. The predetermined heavy object is configured to press the uppermost stone block in the stone wall toward the lowermost stone block. To elaborate, the stone wall of the station platform is composed of multiple stone blocks, and anchor members are driven from the stone blocks that are exposed above ground level towards the lowest layer of stone blocks. Furthermore, in the case of stone blocks that are exposed above ground level, a portion of those blocks is visible above the ground.

[0007] In this type of station platform reinforcement structure, the stone blocks above ground level are integrated with a resin-based reinforcing coating, and the stone blocks exposed above ground level in the stone wall and the lowest layer of stone blocks are fixed together by anchor members, resulting in a configuration where all layers of stone blocks are integrated. Furthermore, certain heavy objects installed on the station platform (such as platform door equipment) press the uppermost stone blocks of the stone wall toward the lowermost stone blocks, resulting in a higher degree of contact between the stone blocks compared to station platform structures without such heavy objects. In this way, the stacked stone blocks are integrated by a resin reinforcing coating and anchor members, and the stacked stone blocks are also pressed together and integrated by a predetermined heavy object, thereby increasing the rigidity of the stone wall. In this way, the rigidity of the stone masonry wall supporting the embankment is increased, thereby improving the earthquake resistance of the station platform. In particular, this station platform reinforcement structure can effectively reinforce the station platform when there is a structure (a certain heavy object) on top of the stone wall of the station platform.

[0008] Furthermore, preferably, The anchor member is positioned so as to be inclined from the front surface of the stone blocks exposed above ground level in the stone wall toward the lowest stone block. By doing this, the angled anchor members can be used to secure the stone blocks in the stone wall that are exposed above ground level to the lowest layer of stone blocks.

[0009] Furthermore, preferably, The anchor member is positioned so as to be located near the boundary between the stone wall and the ground, and extending toward the lowest stone block. This allows for the installation of anchor members that penetrate the lowest layer of stone blocks underground from a relatively low position.

[0010] Furthermore, preferably, The stone blocks in the aforementioned stone wall that are exposed above ground are arranged in such a manner that a portion of their upper surface is exposed. The anchor member is positioned vertically from the upper surface of the stone blocks exposed above ground level in the stone wall toward the lowest stone block. By doing so, it is possible to fix the stacked blocks at the portion exposed from the ground in the masonry wall and the lowermost stacked block with a vertically oriented anchor member.

[0011] Also, preferably, at least one of the anchor members is arranged for the stacked blocks at the portion exposed from the ground arranged side by side along the extending direction of the masonry wall. By doing so, it is possible to fix the stacked blocks at the portion exposed from the ground in the masonry wall and the lowermost stacked block with the anchor member over the entire area of the masonry wall along the extending direction of the masonry wall.

Effect of the Invention

[0012] According to the present invention, when there is a structure on the masonry wall of the station platform, the station platform can be suitably reinforced.

Brief Description of the Drawings

[0013] [Figure 1] It is a cross-sectional view (a) and a front view (b) showing the reinforcement structure of the station platform of the present embodiment. [Figure 2] It is a cross-sectional view (a) and a front view (b) showing a modified example of the reinforcement structure of the station platform of the present embodiment.

Mode for Carrying Out the Invention

[0014] Hereinafter, referring to the drawings, an embodiment of the reinforcement structure of the station platform according to the present invention will be described in detail. However, the embodiments described below are subject to various technically preferable limitations for carrying out the present invention, but the scope of the present invention is not limited to the following embodiments and illustrated examples.

[0015] In the present embodiment, a cut-and-fill type station platform having a structure in which an existing masonry wall 2 formed by stacking a plurality of stacked blocks 1 supports the inner embankment 3, and a reinforcement structure for reinforcing the station platform in which the masonry wall 2 extends along the extending direction of the station platform will be described. Particularly, a reinforced structure for reinforcing a platform of an embankment type where a stone masonry wall 2 supports an inner embankment 3 and the platform already has platform door equipment D installed thereon will be described.

[0016] The stone masonry wall 2 of the platform is formed by stacking a plurality of stone masonry blocks 1 such that most of its outer surface forms a vertical plane. In this embodiment, the stone masonry wall 2 is formed by stacking five layers of stone masonry blocks 1, for example, as shown in FIGS. 1(a) and 1(b), and is buried in the ground up to the middle of the second layer from the bottom. Specifically, the lowermost stone masonry block 1 in the stone masonry wall 2 is buried below the ground G, and a part of the stone masonry block 1 in the second layer from the bottom is exposed from the ground G. Here, the ground G shown in the figure is the ballast surface in the railway track. However, it is assumed that the lowermost stone masonry block 1 and a part of the stone masonry block 1 in the second layer from the bottom are buried in the ground below the ballast of the ballast surface. The lowermost stone masonry block 1 buried in the ground functions as the foundation stone of the stone masonry wall 2. Note that the stone masonry block 1 referred to in this embodiment may be either a block made of stone or a block made of concrete.

[0017] Platform door equipment D is installed on the platform. The platform door equipment D is installed so as to be located above the stone masonry wall 2. Specifically, as shown in FIGS. 1(a) and 1(b), an H-shaped steel 60 is arranged on the uppermost stone masonry block 1 in the stone masonry wall 2, and the platform door equipment D is installed on an upper plate member 40 arranged on the H-shaped steel 60. An L-shaped steel 61 is arranged on the side of the embankment 3 rather than the H-shaped steel 60 at the same height position as the H-shaped steel 60.

[0018] The H-shaped steel 60 is fixed to the uppermost stone masonry block 1 using fastening members B such as long screws and anchors in order to provide a predetermined space 62 above the stone masonry wall 2 (stone masonry block 1). The fastening member B that secures the H-shaped steel 60 to the stone block 1 has a length that extends up to the second row of stone blocks 1 from the top. Since the H-shaped steel 60 is made of rigid steel, it has sufficient strength to adequately support the platform door equipment D, which is installed on the upper plate member 40 and above the H-shaped steel 60. The L-shaped steel beam 61 has the function of widening the space 62 above the stone wall 2 and the function of retaining the earth to prevent the embankment 3 from encroaching on the space 62. In particular, this L-shaped steel beam 61 is installed in a state where the embankment 3 on the back side of the stone wall 2 has been pressed and compacted. In this embodiment, the H-shaped steel beam 60 and the L-shaped steel beam 61 form a space 62 for passing cables and the like of the platform door equipment D installed on the station platform.

[0019] The upper plate member 40 is, for example, a concrete plate-shaped member (RC plate) and is fixed to the H-shaped steel 60. Furthermore, a reinforced embankment layer 50, for example using geotextile, is formed between the upper plate member 40 and the embankment 3. This reinforced embankment layer 50 has the function of preventing the upper plate member 40 from settling. Furthermore, shear keys 45 are provided to prevent displacement between the upper plate member 40 and the embankment reinforcement layer 50.

[0020] Next, the station platform reinforcement structure 100 of this embodiment will be described. The station platform reinforcement structure 100 of this embodiment is a reinforcement structure for a station platform in which a predetermined heavy object is installed on the station platform that presses the uppermost stone block 1 of the stone wall 2 toward the lowermost stone block 1. In this embodiment, the platform door equipment D functions as a predetermined heavy object, and the platform door equipment D installed on the station platform presses the uppermost stone block 1 of the stone wall 2 toward the lowermost stone block 1.

[0021] The station platform reinforcement structure 100 includes, for example, as shown in Figures 1(a) and (b), an anchor member 4 that penetrates from the second-to-last stone block 1 (the second-to-last stone block 1) in the stone wall 2 at a location exposed from the ground G, to the lowest stone block 1, and a resin reinforcing coating 5 provided on the outer surface of the stone wall 2 above the ground G and in close contact with the stone blocks 1 above the ground G. In other words, in the station platform reinforcement structure 100 of this embodiment, an anchor member 4 is provided on the stone masonry block 1 (the second stone masonry block 1 from the bottom) at the portion of the stone masonry wall 2 that is exposed from the ground G, and a resin reinforcing coating 5 is provided on the outer surface of the stone masonry wall 2 above the ground G, which is in close contact with the stone masonry block 1 above the ground G and becomes one with the stone masonry block 1 above the ground G.

[0022] The anchor member 4 is positioned in an inclined position from the front of the stone block 1 (the second stone block 1 from the bottom) at the point exposed from the ground G in the stone wall 2 toward the lowest stone block 1. This anchor member 4 secures the second-to-last stone block 1 from the bottom to the bottommost stone block 1. Furthermore, as shown in Figure 1(b), at least one anchor member 4 is provided for each portion of the masonry block 1 that is exposed from the ground and aligned along the extension direction of the masonry wall 2. Here, the anchor members 4 are provided at intervals of two per masonry block 1. In particular, the anchor member 4 is positioned from near the boundary between the stone wall 2 and the ground G toward the lowest stone block 1. If the anchor member 4 is installed by embedding it from the boundary between the stone wall 2 (stone block 1) and the ground G, the anchor member 4 can be installed by penetrating the lowest stone block 1 from a relatively low position without having to dig out or put back ballast in order to install the anchor member 4. The procedure for installing the anchor member 4 is the same as that known conventionally; a hole for installing the anchor is formed in the stone wall 2 (stone block 1), mortar is injected into the hole, and then the anchor member 4 is inserted into the hole.

[0023] The resin-based reinforcing coating 5 is a resin layer formed on the outer surface of the stone wall 2 by spraying a predetermined resin liquid onto the outer surface of the stone wall 2 above the ground G. For example, a reinforcing coating 5 can be formed on the outer surface of the stone wall 2 by spraying polyurea resin onto it using a spray gun. This resin-based reinforcing coating 5 is formed to a thickness of approximately 2.0 mm. Furthermore, the resin-based reinforcing coating 5 penetrates into the uneven surface of the stone wall 2 (stone block 1) and adheres tightly to the stone wall 2 (stone block 1). If such a resin-based reinforcing coating 5 is provided on the outer surface of the stone wall 2, the stone blocks 1 above ground level G can be integrated by the reinforcing coating 5.

[0024] Furthermore, when constructing the station platform reinforcement structure 100 of this embodiment, the procedure may be to first form a resin-based reinforcing coating 5 on the outer surface of the stone wall 2 and then install the anchor member 4 at the lower part of the stone wall 2, or to install the anchor member 4 at the lower part of the stone wall 2 and then form the resin-based reinforcing coating 5 on the outer surface of the stone wall 2.

[0025] Thus, in the station platform reinforcement structure 100 of this embodiment, the stone blocks 1 above ground level G are integrated by a resin reinforcing coating 5, and the stone blocks 1 exposed from ground level G in the stone wall 2 and the lowest stone block 1 are fixed by anchor members 4, so that all the stone blocks 1 of all levels are integrated.

[0026] Furthermore, the platform door equipment D installed on the station platform presses the uppermost stone block 1 of the stone wall 2 toward the lowermost stone block 1, causing the stacked stone blocks 1 to be pressed together and thus become tightly packed and integrated. Specifically, the weight of the platform door equipment D installed on the station platform causes the stacked stone blocks 1 to press together, making it difficult for the stone blocks 1 to slip, and thus the stone blocks 1 become integrated with each other. Furthermore, the platform door equipment D installed on the station platform presses the uppermost stone block 1 of the stone wall 2 toward the lowest stone block 1 via the upper plate member 40 and the H-shaped steel 60, so the upper plate member 40 and the H-shaped steel 60 are also integrated with the stone block 1 (stone wall 2) by the pressure action of the platform door equipment D.

[0027] In this way, the stacked stone blocks 1 are integrated by a resin reinforcing coating 5 and anchor members 4, and the stacked stone blocks 1 are pressed together and integrated by the weight of the platform door equipment D, thereby increasing the rigidity of the stone wall 2. In this way, the rigidity of the stone wall 2 supporting the embankment 3 is increased, thereby improving the earthquake resistance of the station platform.

[0028] For example, in the station platform reinforcement structure disclosed in Embodiment 2 of Japanese Patent Publication No. 2020-165098 (see Figures 3(a) and 3(b) of the said publication), there is no structure (heavy object) that presses the uppermost stone blocks in the stone wall toward the lowermost stone blocks. As a result, sliding is relatively likely to occur between the stacked stone blocks in the stone wall, and in the event of a large earthquake, for example, the stone wall may collapse due to the sliding of the stone blocks caused by the earth pressure of the embankment. To prevent the stone wall from collapsing due to the sliding of such stone blocks, rod-shaped members (anchors) are installed on the upper side of the stone wall to resist the earth pressure of the embankment. In contrast, in the station platform reinforcement structure 100 of this embodiment, the inventors have found that it is effective to install anchor members 4 on the lower side of the stone wall 2 and fix the upper stone blocks 1 to the lowest stone block 1 which serves as the base stone, in order to prevent the stone wall 2, which is formed by integrating stacked stone blocks 1, from collapsing, and have come to the present invention.

[0029] As described above, if the station platform reinforcement structure 100 of this embodiment is constructed on an existing station platform, the stone wall 2 will not collapse and the station platform will not be damaged, even in the event of a large-scale earthquake. Thus, with the station platform reinforcement structure 100 of this embodiment, it is possible to prevent damage to the station platform. In particular, the station platform reinforcement structure 100 of this embodiment can be suitably used to reinforce the station platform when there are structures (heavy objects) such as platform door equipment D on the stone wall 2 of the station platform.

[0030] However, the present invention is not limited to the embodiments described above. For example, as shown in Figures 2(a) and 2(b), if the stone blocks 1 (the second-to-last stone block 1) in the stone wall 2 that are exposed from the ground G are stacked in such a manner that a portion of their upper surfaces is exposed, the anchor member 4 may be arranged vertically from the upper surface of that stone block 1 (the second-to-last stone block 1) toward the lowest stone block 1. Even with such a station platform reinforcement structure 100, the station platform can be effectively reinforced when there are structures (heavy objects) such as platform door equipment D on the stone wall 2 of the station platform.

[0031] As described above, the station platform reinforcement structure 100 of this embodiment can suitably reinforce station platforms even if platform door equipment D has already been installed. In particular, with the station platform reinforcement structure 100 of this embodiment, the station platform can be suitably reinforced without having to temporarily remove the platform door equipment D.

[0032] In the above embodiment, the stone wall 2 was assumed to consist of five layers of stone blocks 1, but the number of layers of stone blocks 1 is arbitrary, and the stone wall 2 may consist of four layers, six layers, or other configurations.

[0033] Furthermore, in the above embodiments, the stone blocks 1 in the stone wall 2 are buried in the ground up to the middle of the second row from the bottom. However, the present invention is not limited to this, and for example, the stone wall 2 may also have a portion of the third row of stone blocks 1 from the bottom exposed above the ground G. In that case, an anchor member 4 is installed that penetrates from the third stone block 1 from the bottom, through the second stone block 1 from the bottom, and into the bottommost stone block 1.

[0034] Furthermore, it goes without saying that other specific structural details can be modified as needed. [Explanation of symbols]

[0035] 1 stone block 2. Stone wall 3. Embankment 4 Anchor members 5. Reinforcement coating 40 Upper plate member 45 Shear Key 50 Embankment reinforcement layer 60 H-beam 61 L-shaped steel 62 Space 100 Reinforcement structures for station platforms D. Platform screen door equipment (specified weight item) G ground

Claims

1. A stone wall, constructed by stacking multiple stone blocks, extends along the direction of the station platform, and this stone wall supports the inner embankment, providing a reinforcement structure for the station platform. A certain heavy object is installed on the aforementioned station platform. At least the lowest layer of stone blocks in the aforementioned stone wall are buried below ground level. In the aforementioned stone wall, an anchor member is provided in the stone blocks that are exposed above ground level, penetrating from that stone block to the lowest stone block. The outer surface of the aforementioned stone wall above ground level is provided with a reinforcing resin coating that adheres closely to the stone blocks above ground level. A station platform reinforcement structure characterized in that the predetermined heavy object is configured to press the uppermost stone block in the stone wall toward the lowermost stone block.

2. The station platform reinforcement structure according to claim 1, characterized in that the anchor member is arranged in an inclined position from the front surface of the stone blocks in the stone wall that are exposed from the ground toward the lowest stone block.

3. The station platform reinforcement structure according to claim 2, characterized in that the anchor member is arranged from near the boundary between the stone wall and the ground toward the lowest stone block.

4. The stone blocks in the aforementioned stone wall that are exposed above ground are arranged in such a manner that a portion of their upper surface is exposed. The station platform reinforcement structure according to claim 1, characterized in that the anchor member is arranged vertically from the upper surface of the stone blocks in the stone wall that are exposed from the ground toward the lowest stone block.

5. The station platform reinforcing structure according to any one of claims 1 to 4, characterized in that at least one anchor member is provided for the stone blocks of the portion exposed from the ground that is aligned along the extending direction of the stone wall.

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