Foundation structure for platform fence and foundation construction method

Abstract

To install a platform fence without performing civil engineering work for reinforcing a platform, and to shorten the whole construction period, and to compress a business cost, by avoiding duplication of a preliminary survey and a survey, and process adjustment of a tie-in part between traders, by allowing an installation trader of the platform fence to consistently contract the work.SOLUTION: A foundation structure for installing a platform fence (2) on a platform (1) having an overhanging platform upper portion (3) and a vacant space (4) below the platform upper portion (3) includes a through hole (5) formed in the platform upper portion (3) at a position where the platform fence (2) is to be installed, and a foundation support (6) standing on a bottom of the vacant space (4) immediately below the through hole (5) and having a top reaching an upper surface of the platform (1).SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a foundation structure of a platform fence and a foundation construction method. [Background technology]

[0002] In recent years, railway companies have been installing platform fences on station platforms to prevent station users from falling onto the tracks, with the aim of improving safety for all station users, including the visually impaired (see, for example, Patent Documents 1, 2, and 3 below).

[0003] When installing this type of platform fence on a platform, it is common for the platform to bear the fence's own weight and all horizontal loads, but since platform fences are large installations weighing over 400 kg per fence, it becomes necessary to reinforce the platform side. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Laid-Open No. 2012-158879 [Patent Document 2] Japanese Patent Application Laid-Open No. 2019-143449 [Patent Document 3] Japanese Patent Application Laid-Open No. 2015-054572 Summary of the Invention [Problem to be solved by the invention]

[0005] However, there are a wide variety of platform types, and when it comes to installing platform fences, it takes a lot of time and money to investigate the structure of the existing platform, the design conditions of surrounding structures, and the structural conditions for placement, so there is a need to reduce these costs and shorten the construction period.

[0006] Furthermore, because platform reinforcement work is generally undertaken by civil engineering companies, the platform reinforcement work and the platform fence installation work are ordered from different contractors. This means that preliminary surveys and measurements are carried out for both the platform reinforcement work and the platform fence installation work, resulting in unnecessary work. It also takes time to coordinate the work schedules between contractors, which lengthens the overall construction period and increases project costs.

[0007] The present invention was made in consideration of the above-mentioned circumstances, and aims to make it possible to install platform fences without carrying out civil engineering work to reinforce the platform, and to have the platform fence installation contractor undertake the entire construction work, thereby avoiding duplication of preliminary investigations and surveying, etc., and schedule adjustments between contractors, thereby shortening the overall construction period and reducing project costs. [Means for solving the problem]

[0008] The present invention is a foundation structure for installing a platform fence on a platform where the upper part of the platform is overhanging and there is free space below it, This relates to a foundation structure for a platform fence, which comprises a through hole drilled at the installation position of the platform fence above the platform, and a foundation support pillar erected at the bottom of the empty space directly below the through hole and with a top that passes through the through hole and reaches the top surface of the platform, with the platform fence installed on the top of the foundation support pillar and supported so as not to place a load on the platform side.

[0009] Furthermore, in the foundation structure of the platform fence of the present invention, it is preferable that the foundation support is divided into a lower pillar that is fixed to the bottom of the empty space and stands upright, and an upper pillar that is inserted from above into a through hole in the top of the platform and fitted into the lower pillar, and that the two be connected by fine-tuning the vertical and horizontal positions of the upper pillar relative to the lower pillar.

[0010] In the case of a platform with an embankment specification, the open space may be secured by removing the embankment so that the top of the platform has an overhanging shape.

[0011] Furthermore, the present invention provides a foundation construction method for installing platform fences on a platform having an overhanging upper part and an open space below the platform, The present invention also relates to a foundation construction method for a platform fence, which comprises drilling a through hole at the installation position of the platform fence above the platform, erecting a foundation support pillar at the bottom of the empty space directly below the through hole, passing the top of the foundation support pillar through the through hole and exposing it on the top surface of the platform, and assembling the platform fence to the top of the foundation support pillar exposed on the top surface of the platform so as to support it without placing a load on the platform side.

[0012] Furthermore, in the foundation construction method for platform fences of the present invention, it is preferable to use a foundation support that is divided into a lower post and an upper post, and after fixing the lower post to the bottom of the empty space and standing it up, insert the upper post from above into a through hole in the top of the platform and fit it into the lower post, and then fine-tune the vertical and horizontal positions of the upper post relative to the lower post to connect the two.

[0013] In the case of a platform with an embankment specification, the process may include a step of removing the embankment to create an open space so that the top of the platform has an overhanging shape. [Effects of the Invention]

[0014] According to the platform fence foundation structure and foundation construction method of the present invention, the platform fence can be supported in a way that does not place a load on the platform side, making it possible to install the platform fence without carrying out civil engineering work to reinforce the platform.In addition, by having the platform fence installation contractor undertake the entire construction work, it is possible to avoid duplication of pre-inspections and surveying, etc., and the need to coordinate schedules between contractors, which can achieve a variety of excellent effects, such as significantly shortening the overall construction period and significantly reducing project costs. [Brief explanation of the drawings]

[0015] [Figure 1] 1 is an overall configuration diagram showing an embodiment of the present invention; [Figure 2] FIG. 10 is a side cross-sectional view illustrating the marking step in this embodiment. [Figure 3] 10A to 10C are side cross-sectional views illustrating a process of drilling a through hole in this embodiment. [Figure 4] FIG. 10 is a side cross-sectional view showing the installation process of the base mortar and anchor bolts in this embodiment. [Figure 5] FIG. 10 is a side cross-sectional view showing the installation process of the lower column in this embodiment. [Figure 6] 10 is a side cross-sectional view showing the process of inserting the upper post into the lower post in this embodiment. FIG. [Figure 7] 10 is a side cross-sectional view showing the process of connecting the upper column and the lower column in this embodiment. FIG. [Figure 8] FIG. 10 is a cross-sectional plan view showing details of the adjustment bolt of the lower pillar in this embodiment. [Figure 9] FIG. 10 is a cross-sectional plan view showing a temporary assembly process with an adjustment jig in this embodiment. [Figure 10] A cross-sectional plan view showing the process of injecting grout into a cavity in a lower column in this embodiment. [Figure 11] This is a cross-sectional plan view showing the process of injecting grout into the gap under the base plate at the lower end of the lower column and the gap between the through hole and the upper column in this embodiment. [Figure 12] This is a side cross-sectional view showing the installation process of the platform fence in this embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0016] Hereinafter, an embodiment of the present invention will be described with reference to the accompanying drawings.

[0017] Figures 1 to 12 show one embodiment of the present invention, and Figure 1 shows the completed state of this embodiment, explaining the basic structure for installing platform fences 2 on a platform 1 of a railway company station to prevent station users from falling onto the tracks.

[0018] First, the foundation structure of the platform fence 2 in this embodiment is intended for application to a platform 1 in which the upper part 3 of the platform has an overhanging shape (see the side cross-sectional view of Figure 2) and there is an empty space 4 below it, and is characterized by comprising a through hole 5 drilled at the installation position of the platform fence 2 in the upper part 3 of the platform, and a foundation support 6 erected at the bottom of the empty space 4 directly below the through hole 5 and with a top that passes through the through hole 5 and reaches the top surface of the platform 1, and the platform fence 2 is installed on the top of the foundation support 6 and supported so as not to place a load on the platform 1 side.

[0019] More specifically, the foundation support 6 is divided into a lower pillar 7 that is fixed to the bottom of the empty space 4 and stands upright, and an upper pillar 8 that is inserted from above into the through-hole 5 in the top of the platform 3 and fitted into the lower pillar 7, and the two can be connected by fine-tuning the vertical and horizontal positions of the upper pillar 8 relative to the lower pillar 7.

[0020] The platform fence 2 in this embodiment is itself a conventionally well-known type, and is composed of a movable fence 9 that opens and closes left and right in conjunction with the opening and closing of the train's boarding and alighting doors, and a fixed fence 10 that forms a door pocket structure to house the movable fence 9 and incorporates the drive mechanism and control mechanism for the movable fence 9, and the platform fence 2 is installed by supporting the fixed fence 10 with the foundation support 6.

[0021] The process of installing platform fence 2 as shown in Figure 1 will be explained in order below using Figures 2 to 12. As mentioned above, the platform 1 shown in Figures 2 to 12 has a structure in which the upper part of the platform 3 has an overhanging shape, and below this there is secured an empty space 4. In the case of a platform 1 with an embankment specification, it is possible to secure the empty space 4 by removing the embankment so that the upper part of the platform 3 has an overhanging shape.

[0022] First, in installing the platform fence 2 on the platform 1 in this embodiment, the first step is to determine the installation position of the platform fence 2 on the upper part of the platform 3 by surveying and marking it out, as shown in Figure 2, and then, based on the marked out positions, drill a plurality of through holes 5 aligned in the longitudinal direction of the platform 1 (the direction perpendicular to the drawing in Figure 4), as shown in Figure 3. Of course, these through holes 5 are closed with core caps 11 or the like to ensure safety during the construction period.

[0023] After drilling the through holes 5 in this manner, as shown in Figure 4, base mortar 13 is piled on the lower part of the platform 12 at the bottom of the empty space 4 directly below the through holes 5, and the heights of the base mortar 13 that will be lined up in the longitudinal direction of the platform 1 (the direction perpendicular to the drawing in Figure 4) are adjusted so that they are all at the same level and allowed to cure, while adhesive anchors are applied around the periphery of each base mortar 13 to fix anchor bolts 14 (fully threaded, etc.).

[0024] Next, as shown in Figure 5, the lower columns 7 are installed upright on each of the base mortar 13, and the periphery of the base plate 7a at the lower end of the lower columns 7 is temporarily tightened using the anchor bolts 14. Thereafter, as shown in Figure 6, the upper columns 8 are inserted from above into the through holes 5 in the upper part of the platform 3 and fitted into the lower columns 7. Next, as shown in Figure 7, the upper columns 8 are temporarily tightened using the adjustment bolts 15 provided in the middle of the lower columns 7 to connect the two, and the lower columns 7 and upper columns 8 form the foundation support 6.

[0025] As shown in the plan view of Figure 8, the adjustment bolts 15 are screwed into each of the four side surfaces of the middle part of the lower pillar 7, and by tightening these adjustment bolts 15, the upper end of the upper pillar 8 (the top of the foundation support 6) is fixed so that it is flush with the top surface of the platform 1, while by increasing or decreasing the degree of tightening of the opposing pairs of adjustment bolts 15, the horizontal position of the upper pillar 8 relative to the lower pillar 7 can be fine-tuned.

[0026] Here, when inserting the upper pillar 8 from above into the through-hole 5 in the top of the platform 3 and fitting it into the lower pillar 7, this is done using a removable temporary handle 16 attached to the top end of the upper pillar 8, and the temporary handle 16 is removed after the adjustment bolt 15 has been temporarily tightened. Before the adjustment bolt 15 is temporarily tightened, the verticality of the foundation pillar 6 is confirmed using a spirit level 17 (see Figure 7) or the like.

[0027] 9, an adjustment jig 18 that imitates the mounting portion at the lower end of the platform fence 2 is used to temporarily assemble the top of the foundation support pillar 6 exposed on the top surface of the platform 1 from the through-hole 5 to the adjustment jig 18, and the vertical and horizontal positions of the upper pillar 8 relative to the lower pillar 7 are finely adjusted so that the mounting points of both are properly aligned, and once the position is determined, the adjustment bolts 15 are finally tightened. At this time, the foundation support pillar 6 stands with its top loosely fitted into the through-hole 5, and stands on its own in a state completely separated from the platform 1 side.

[0028] After that, as shown in Figure 10, grout is injected into the cavity inside the lower column 7 through the hole on the side of the upper column 8 as a rust prevention measure, and once the injection of this grout is completed, the anchor bolt 14 is tightened and the adjustment jig 18 is removed, and then, as shown in Figure 11, grout is injected into the gap below the base plate 7a at the lower end of the lower column 7, and grout is also injected into the gap between the through hole 5 and the upper column 8.

[0029] Once the foundation support 6 has been erected as described above, as shown in Figure 12, the fixed fence 10 of the platform fence 2 is attached to the top of the foundation support 6 exposed on the top surface of the platform 1 by bolting or the like, so that it is supported so as not to place a load on the platform 1 side, and the installation of the platform fence 2 is completed.

[0030] In this way, the platform fence 2 can be attached to the top of the foundation support pillar 6, which stands on its own while being completely separated from the platform 1, and the platform fence 2 can be supported so that no load is transmitted to the platform 1. This eliminates the need to reinforce the platform 1 when installing the platform fence 2, and enables the installer of the platform fence 2 to undertake the entire work. As a result, there is no longer any need to waste time on the duplicate preliminary investigations and surveys, etc., that were previously required for the platform 1 reinforcement work and the platform fence 2 installation work, and there is also no need to coordinate processes between contractors.

[0031] Therefore, according to the above embodiment, the platform fence 2 can be supported so as not to place a load on the platform 1 side, so that the platform fence 2 can be installed without carrying out civil engineering work to reinforce the platform 1, and by having the platform fence 2 installation contractor undertake the entire construction work, it is possible to avoid duplication of preliminary investigations and surveying, etc., and schedule adjustments between contractors, so that the overall construction period can be significantly shortened and project costs can be significantly reduced.

[0032] Furthermore, the foundation structure and foundation construction method of the platform fence of the present invention are not limited to the above-mentioned embodiments, and it goes without saying that various modifications can be made within the scope that does not deviate from the gist of the present invention. [Explanation of symbols]

[0033] 1 Platform 2 Platform fence 3 Top of the platform 4. Free Space 5 through holes 6 Foundation support 7 Lower pillar 8 Upper pillar 12 Under the platform (bottom of the empty space)

Claims

1. A foundation structure for installing a platform fence on a platform where the top of the platform is overhanging and there is free space below it. A foundation structure for a platform fence comprises a through hole drilled at the installation position of the platform fence above the platform, and a foundation support pillar erected at the bottom of the empty space directly below the through hole and having a top that passes through the through hole and reaches the top surface of the platform, with the platform fence installed on the top of the foundation support pillar so as not to place a load on the platform side.

2. The foundation support pillar is divided into a lower pillar that is fixed to the bottom of the empty space and stands upright, and an upper pillar that is inserted from above into a through hole in the upper part of the platform and fitted into the lower pillar, and is configured so that the vertical and horizontal positions of the upper pillar relative to the lower pillar can be fine-tuned to connect the two.

3. 3. The platform fence foundation structure according to claim 1 or 2, wherein in the case of a platform with an embankment, an open space is secured by removing the embankment so that the top of the platform has an overhanging shape.

4. A foundation construction method for installing platform fences on a platform where the top of the platform is overhanging and there is free space below it, A foundation construction method for a platform fence, which comprises drilling a through hole at the installation position of the platform fence above the platform, erecting a foundation support pillar at the bottom of the empty space directly below the through hole, passing the top of the foundation support pillar through the through hole and exposing it on the top surface of the platform, and assembling the platform fence to the top of the foundation support pillar exposed on the top surface of the platform so as to support it without placing a load on the platform side.

5. A foundation construction method for platform fences as described in claim 4, in which a foundation support divided into a lower post and an upper post is used, the lower post is fixed to the bottom of the empty space and erected, the upper post is inserted from above into a through hole in the top of the platform and fitted into the lower post, and the vertical and horizontal positions of the upper post relative to the lower post are fine-tuned to connect the two.

6. 6. A method for constructing the foundation of a platform fence as claimed in claim 4 or 5, which includes, in the case of a platform with an embankment specification, a step of removing the embankment to ensure an open space so that the top of the platform has an overhanging shape.

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