JP3230177U - Precast foundation block for orbit - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a precast foundation block for a track capable of reducing the cost required for laying a block including transportation and improving the workability of rail construction. SOLUTION: A track precast foundation block 10 has a groove shape toward the upper surface side length direction of a block body so as to accommodate a block body 100 having a thickness in the vertical direction and one of a pair of rails. A recessed rail installation portion 101a, a plurality of rod-shaped bodies L arranged so as to project from the side surface at a predetermined interval toward the length direction of one side surface of the block body, and a recessed rail. It has a notch 101b formed in at least the first upper surface region on the side where the rod-shaped body protrudes from the two upper surface regions of the block body separated by the installation portion. [Selection diagram] Fig. 1

Description

The present invention relates to a precast foundation block for fixedly arranging a tram or a rail for LRT (Light Rail Transit) laid on a road.

Many trams and LRTs that run on tracks laid on the road run on rails that are fixed on the rails that are laid with sleepers on the roadbed created by crushed stone or the like.

However, the conventional rail support structure has a problem that a great deal of labor must be spent on the construction of the roadbed. In addition, there is also a problem that the stability of the track is insufficient and maintenance cannot be performed efficiently. Furthermore, since the crushed stones and sleepers that support the rails are located under the lithograph and asphalt pavement, there is also a problem that maintenance of the track including the rails becomes difficult.

Therefore, a method has been proposed in which a pair of rail accommodating grooves are formed in a track slab made of precast concrete, and rails are fixedly arranged in the rail accommodating grooves.
For example, the orbital slab version disclosed in Patent Document 1 can be easily and quickly replaced after the useful life has elapsed.
Further, the concrete track slab disclosed in Patent Document 2 is easy to construct and can improve the compatibility with sharp curves.

Japanese Unexamined Patent Publication No. 2005-232922 Japanese Unexamined Patent Publication No. 2008-127900

However, in the configuration such as the track slab plate disclosed in Patent Document 1 and the concrete track plate disclosed in Patent Document 2, the block has a pair of rail accommodating grooves according to the width (rail width) of the track. There remains the problem that it is large and the cost required for laying including transportation becomes large. In addition, the workability of rail construction such as installing rails of a predetermined length in the rail accommodating groove and connecting (welding) each rail, or connecting rails installed in parallel with a short-circuit wire is possible. There is a problem that it will decrease.

The main object of the present invention is to provide a precast foundation block for a track that can reduce the cost required for laying a block including transportation and improve the workability of rail construction.

The present invention has a length on the upper surface side of the block body so as to accommodate a block body having a thickness in the vertical direction and one of a pair of rails constituting a tram or LRT (Light Rail Transit) track. A rail installation portion recessed in a groove shape in the direction, and a plurality of rail installation portions arranged so as to project from the side surface at a predetermined interval in the length direction of one side surface of the block body. A precast foundation block for tracks that has a rod-shaped body, is installed facing a uniform width, and concrete is placed between them to construct a track, and is provided by the recessed rail installation portion. Of the two upper surface regions of the separated block body, the notch portion is formed at least in the first upper surface region on the side where the rod-shaped body protrudes, and the notch portion is the first upper surface region. The rod-shaped body is formed by being recessed with a predetermined length based on the substantially center of the region and the width of the first upper surface region, and the rod-shaped body is the rod-shaped body in the region of the side surface connected to the notch. It is characterized in that the protrusion intervals of the concrete are arranged so as to be relatively narrow as compared with the protrusion intervals in the regions on the other side surfaces.

According to the present invention, it is possible to reduce the cost required for block laying including transportation and improve the workability of rail construction.

The front view for demonstrating an example of the structure of the orbital precast foundation block which concerns on this embodiment. (A) is a right side view for explaining an example of the configuration of a precast foundation block for an orbit, and (b) is a bottom view. (A) and (b) are diagrams for explaining the laying of precast foundation blocks for tracks. (A) and (b) are diagrams for explaining the state of the precast foundation block for tracks after rail construction. The front view for demonstrating an example of the structure of the orbital precast foundation block which has the notch part different from FIG. (A) is a right side view for explaining an example of the configuration of a precast foundation block for an orbit, and (b) is a bottom view. The figure for demonstrating an example of the structure of a cover block. FIG. 5 is a front view for explaining an example of the configuration of a precast foundation block for an orbit having a notch portion different from that of FIGS. 1, 5, and 7. (A) is a right side view for explaining an example of the configuration of a precast foundation block for an orbit, and (b) is a bottom view. The figure for demonstrating an example of use of a notch part.

Hereinafter, the present invention will be carried out with reference to the drawings, taking as an example the case where the present invention is applied to a tram or a precast foundation block for a track for fixedly arranging rails for LRT (Light Rail Transit) laid on a road. The form will be described.
For example, there is a track block manufactured by Hokukon Co., Ltd. as a track block for constructing a tram track, and the track is constructed by installing the track blocks facing each other in a uniform width and placing concrete between them. There is something to build. The track block manufactured by Hokukon Co., Ltd. has been devised such as protruding reinforcing bars and recesses to prevent displacement from the concrete placed due to the train load acting concentrated on the groove.
The present invention provides a precast foundation block for a track that further improves the workability of rail construction.

[Example of Embodiment]
FIG. 1 is a front view for explaining an example of the configuration of the orbital precast foundation block according to the present embodiment. 2 (a) is a right side view for explaining an example of the configuration of the orbital precast foundation block according to the present embodiment, and FIG. 2 (b) is a bottom view thereof.
Hereinafter, the main configuration of the orbital precast foundation block according to the present embodiment will be described with reference to FIGS. 1 and 2.

The track precast foundation block 10 shown in FIGS. 1 and 2 is used for fixedly installing a pair of rails constituting a tram or LRT (Light Rail Transit) track.
The track precast foundation block 10 includes a block main body 100, a rail installation portion 101a, a notch portion 101b, a cotter portion 101c, an anti-slip portion 102, and a rod-shaped body L.

The block body 100 is a rectangular parallelepiped formed of, for example, concrete, having a predetermined thickness and a predetermined length in the vertical direction. Further, the block body 100 has a groove toward the upper surface side length direction of the block body 100 so as to accommodate one of the pair of rails constituting the tram or LRT (Light Rail Transit) track. A rail installation portion 101a recessed in a shape is formed. The rail R is accommodated in the rail installation portion 101a as shown in FIG. 4 described later. The depth of the rail installation portion 101a can be arbitrarily adjusted according to the rail R to be accommodated.

Further, the block main body 100 has two upper surface regions (see FIG. 2) of the block main body 100 separated in the width direction by a recessed rail installation portion 101a. A notch 101b is formed in at least the first upper surface region S on the side where the rod-shaped body L protrudes from the two upper surface regions.
The cutout portion 101b is formed, for example, with a predetermined length based on a substantially center of the first upper surface region S and a width size of the first upper surface region S. The length and depth of the cutout portion 101b can be set arbitrarily.
For example, in consideration of the workability of rail laying, the position of the cutout portion 101b may be determined with reference to the substantially center of the length of the block body 100, or the notch portion 101b may be displaced from the reference by an arbitrary distance in the end direction. It may be positioned. Further, the depth of the cutout portion 101b may be approximately the same as the depth of the rail installation portion 101a, or may be relatively shallower than the depth of the rail installation portion 101a. The cutout portion 101b may be formed in a shape and size so as not to impair the workability of rail laying.

The rod-shaped body L is, for example, a reinforcing bar, and is arranged so as to project from the side surface at a predetermined interval toward the length direction of one side surface of the block body 100. For example, a part of the total length of the rod-shaped body L is embedded inside the block body 100, and the remaining part protrudes from the side surface of the block body 100.
Further, the rod-shaped body L has a side surface region (B shown in FIG. 1) in which the protrusion interval of the rod-shaped body L in the side surface region (range of A shown in FIG. 1) of the block body 100 connected to the cutout portion 101b is other than that. The spacing is arranged so as to be relatively narrower than the protrusion spacing in (range).

Here, one of the purposes of arranging the rod-shaped body L as described above is to reinforce the region where the thickness of the block body 100 in the vertical direction becomes thin by forming the cutout portion 101b. For example, the rod-shaped body L is arranged by halving the interval of the range of B as compared with the interval of the range of A.
Here, the outline of how to use the orbital precast foundation block 10 will be described with reference to FIGS. 3 and 4.

FIG. 3 is a diagram for explaining the laying of the orbital precast foundation block 10. FIG. 3A is a top view, and FIG. 3B is a side view thereof.
A pair of track precast foundation blocks 10 are used to fix and install a pair of rails constituting a tram or LRT (Light Rail Transit) track. Specifically, as shown in FIGS. 3A and 3B, the side surfaces on which the rod-shaped body L protrudes are laid so as to face each other, and the pair of rails are fixedly installed. That is, one (one) rail can be accommodated in one track precast foundation block 10. In this respect, the rod-shaped body L also defines the "direction" of the orbital precast foundation block 10 when laying the orbital precast foundation block 10. Further, by setting the length of the rod-shaped body L (the length of the protruding portion) to a length corresponding to the distance between the pair of orbital precast foundation blocks 10, the large position of the orbital precast foundation block 10 after placement is obtained. It is possible to prevent the occurrence of correction.

FIG. 4 is a diagram for explaining a state of the track precast foundation block 10 after rail construction.
As shown in FIGS. 4A and 4B, after excavating the ground (road surface) G according to the track width, a pair of track precast foundation blocks 10 are opposed to the side surfaces on which the rod-shaped body L protrudes. Arrange. Then, cast-in-place concrete or the like is allocated to the space including the rod-shaped body L of each of the track precast foundation blocks 10 to lay the track precast foundation block 10. Further, a pair of rails R are accommodated in each rail installation portion 101a, and the rails R are fixed. Rail construction is performed in this way.

Returning to the description of FIGS. 1 and 2, the cotter portion 101c is for preventing the shearing of the cast-in-place concrete applied as described above.

The anti-slip portion 102 is a convex portion having a predetermined shape formed for so-called anti-slip. The configuration of the anti-slip portion 102 shown in FIG. 1 is an example, and the shape, the height of the convex portion, and the like can be arbitrarily set as long as the anti-slip effect can be expected.

The track precast foundation block 10 according to the present embodiment has approximately half the size (width size) as compared with a conventional block having a pair of rail accommodating grooves according to the track width (rail width). Therefore, it is possible to greatly reduce the work cost required for laying including transportation.
Further, since the cutout portion 101b is formed in the track precast foundation block 10, rails having a predetermined length are installed in series on the rail installation portion 101a of the track precast foundation block 10 laid, and each rail is installed. It is possible to improve the workability of rail construction, such as the work of connecting (welding) rails and the work of connecting a pair of rails installed in parallel with a short-circuit wire.

As described above, the track precast foundation block according to the present embodiment can reduce the cost required for block laying including transportation and improve the workability of rail construction.
In addition, it is possible to improve workability by reducing the weight and size of the block. In addition, by making it a factory product by precasting it, it is possible to shorten the construction period of on-site construction.
The length and depth of the cutout portion 101b can be arbitrarily set according to the work content of the rail construction described above.

Further, the configuration of the notch portion in the track precast foundation block according to the present embodiment can be variously set according to the work content of rail construction and the like. Hereinafter, a specific configuration example of the notch portion will be described. The same configurations as those already described are designated by the same reference numerals and the description thereof will be omitted.

[First modification]
FIG. 5 is a front view for explaining an example of the configuration of a precast foundation block for an orbit having a notch portion different from that of FIG. Further, FIG. 6A is a right side view for explaining an example of the configuration of the orbital precast foundation block according to this example, and FIG. 5B is a bottom view thereof.

The track precast foundation block 20 shown in FIG. 5 includes a block main body 200, a rail installation portion 101a, a notch portion 201b, a cotter portion 101c, an anti-slip portion 102, and a rod-shaped body L.
The main difference from the orbital precast foundation block 10 shown in FIG. 1 is the configuration of the notch 201b. The explanation will focus on this point.

The block body 200 has two upper surface regions (see FIG. 5) of the block body 200 separated in the width direction by a recessed rail installation portion 101a. The notch 201b is a notch formed in the first upper surface region S on the side where the rod-shaped body L protrudes, and a notch formed in the second upper surface region P on the side where the rod-shaped body L does not protrude. It consists of a part (see FIG. 6 (b)).
The cutout portion 201b has, for example, a predetermined length with reference to the substantially center of each of the first upper surface region S and the second upper surface region P, and is of the first upper surface region S and the second upper surface region P. Formed in width size. The length and depth of the cutout portion 201b can be arbitrarily set according to the work content of the rail construction described above.

In the track precast foundation block 20 having such a notch portion 201b, the rail can be approached from either the left or right side surface. Therefore, in rail construction, the work of connecting (welding) the rails becomes easier, the work efficiency can be improved, and the reliability of the work such as welding can be further improved.
After connecting the rails, a cover block 400 (see FIG. 9), which will be described later, is placed on each of the cutouts 201b, and the cover block 400 and the block body 200 are attached and detached using a connector such as a bolt. It can also be configured so that it can be fixed freely.

After installing the storage box and connecting the rails, a cover block 400 (see FIG. 7), which will be described later, is placed in each of the cutouts 201b, and a connector such as a bolt is attached to the cover block 400 and the block body 200. It can also be configured so that it can be detachably fixed by using it. The details of the cover block 400 will be described below.

FIG. 7 is a diagram for explaining an example of the configuration of the cover block 400.
The cover block 400 shown in FIGS. 7 (c) and 7 (d) has a convex portion having a predetermined shape formed on the upper surface thereof for so-called anti-slip.
Further, as shown in FIG. 7A, the cover block 400 is placed in the notch 101b in, for example, the track precast foundation block 10, and the cover block 400 and the block body 100 are connected by bolts or the like. It is detachably fixed using a tool. As described above, the cover block 400 is configured to be mounted on the notch 101b, and is formed in a shape and size corresponding to the shape and size of the notch 101b.

Further, as shown in FIG. 7B, the cover block 400 is placed in each of the first upper surface region S and the second upper surface region P in the cutout portion 201b of the orbital precast foundation block 20, for example. The cover block 400 and the block body 200 are detachably fixed using a connector such as a bolt. The same applies to the orbital precast foundation block 30.

In this way, the cover block 400 can make the upper surface (first upper surface region S, second upper surface region P) of the track precast foundation block after rail construction a flat surface. Therefore, it is possible to ensure the safety of pedestrians and the like after the rail construction. Further, since the cover block 400 is removable, future maintenance can be easily performed.

[Second modification]
FIG. 8 is a front view for explaining an example of the configuration of a precast foundation block for a track having a notch portion different from that of FIGS. 1 and 5. Further, FIG. 9A is a right side view for explaining an example of the configuration of the orbital precast foundation block according to this example, and FIG. 9B is a bottom view thereof.

The track precast foundation block 50 shown in FIG. 8 includes a block main body 500, a rail installation portion 101a, a notch portion 501b, a cotter portion 101c, an anti-slip portion 102, and a rod-shaped body L.
The main difference from the orbital precast foundation block 10 shown in FIG. 1 is the configuration of the notch 501b. The explanation will focus on this point.

The block body 500 has two upper surface regions (see FIG. 10) of the block body 500 separated in the width direction by a recessed rail installation portion 101a. Of the two upper surface regions, a notch 501b formed in at least the first upper surface region S on the side where the rod-shaped body L protrudes is formed.
The cutout portion 501b is formed, for example, with a predetermined length based on a substantially center of the first upper surface region S and a width size of the first upper surface region S. The details of setting the length and depth of the cutout portion 501b will be described later.

FIG. 10 is a diagram for explaining an example of use of the cutout portion 501b.
The cutout portion 501b has, for example, a length corresponding to the width of the grating (lid body) 600 shown in FIG. 10A with reference to the substantially center of the first upper surface region S, and the first It is formed with the width size of the upper surface region S. The depth of the cutout portion is a depth corresponding to the thickness of the grating (lid body) 600.

Further, the cutout portion 501b is formed in the above-mentioned region with a length relatively shorter than the width of the grating (lid body) 600 and with a width size of the first upper surface region S. It includes 2 notches. The depth of the second cutout portion can be arbitrarily set.
As described above, the cutout portion 501b has a configuration having a relatively wide region and a narrow region in the length direction of the upper surface region S.

As shown in FIG. 10A, a pair of orbital precast foundation blocks 50 are laid so that the side surfaces on which the rod-shaped bodies L protrude are opposed to each other, and grating (glazing) is performed on both notches 501b. The lid) 600 is placed and hung.

In this way, the orbital precast foundation blocks 50 are installed facing each other, and the receiving frame and the grating (lid body) 600 are embedded in the notch 501b. This makes it possible to collect rainwater from the slab surface (including the cast-in-place concrete portion) and the inside of the rail from the upper part and the side surface of the grating. In this way, the notch 501b functions as a water collecting port and a drainage port.

The above description is for more specific explanation of the present invention, and the scope of the present invention is not limited to these examples. Various embodiments within the scope of the present invention are also included in the present invention, and for example, some of the above-described embodiments may be appropriately combined.

10, 20, 50 ... Precast foundation block for track, 100, 200, 500 ... Block body, 101a ... Rail installation part, 101b, 201b, 501b ... Notch part, 101c ... Cotter Part, 102: Anti-slip part, 400: Cover block, 600: Grating (lid), L: Rod-shaped body (reinforcing bar), R: Rail, G: Ground (road) Surface), S ... First upper surface area, P ... Second upper surface area.

Claims (6)

To accommodate the block body having a thickness in the vertical direction and one of the pair of rails constituting the tram or LRT (Light Rail Transit) track, toward the upper surface side length direction of the block body. A rail installation portion recessed in a groove shape, and a plurality of rod-shaped bodies arranged so as to project from the side surface at a predetermined interval toward the length direction of one side surface of the block body. It is a precast foundation block for rails that constructs rails by installing them facing each other in a uniform width and placing concrete between them.
It has a notch formed in at least the first upper surface region on the side where the rod-shaped body protrudes from the two upper surface regions of the block body separated by the recessed rail installation portion.
The notch is formed to have a predetermined length and a width size of the first upper surface region.
The rod-shaped body is arranged so that the protrusion interval of the rod-shaped body in the region of the side surface connected to the cutout portion is relatively narrow as compared with the protrusion interval of the other side surface region. Characterized by,
Precast foundation block for orbit. The cutout portion is formed to have a predetermined length based on a substantially center of the length of the block body and a width size of the first upper surface region.
The orbital precast foundation block according to claim 1. The cutout portion is a first upper surface region which is two upper surface regions of the block body separated by the recessed rail installation portion and a second upper surface region on the side where the rod-shaped body does not protrude, respectively. It is characterized in that it is formed in a predetermined length based on a substantially center of the length of the block body and in the width size of each upper surface region.
The orbital precast foundation block according to claims 1 and 2. The cutout portion is formed at a depth substantially the same as the depth of the rail installation portion recessed in the groove shape.
The orbital precast foundation block according to claim 1, 2 or 3. It is characterized by having a cover block that is configured to be mounted on the notch and is formed in a shape and size corresponding to the shape and size of the notch.
The orbital precast foundation block according to claim 1. The notch is further formed to include a second notch formed in a length relatively shorter than the predetermined length and in the width size of the first upper surface region. Characteristic,
The orbital precast foundation block according to claim 1.

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