PREFABRICATED WIRE MESH ASSEMBLY FOR BALLAST AND METHOD OF CONSTRUCTING GRAVEL-BALLASTED TRACK USING THE SAME

Description

CROSS-REFERENCE TO RELATED APPLICATION

This application claims priority to and the benefit of Korean Patent Application No. 10-2023-0134345, filed on Oct. 10, 2004, the disclosure of which is incorporated herein by reference in its entirety.

BACKGROUND

Technical Field

The present disclosure relates to a prefabricated wire mesh assembly for a ballast, and more specifically, to a prefabricated wire mesh assembly for a ballast, which can increase injection efficiency by additionally installing an internal partition wall on a wire mesh assembly to effectively support loads without a separate ballast shoulder and injecting a filling material through injection pipes installed on the internal partition wall when the box-shaped fabricated wire mesh assembly, which is filled with crushed stone (including gravel) and injected with the filling material, is used as a gravel-ballast, and a method of constructing a gravel-ballasted track using the same.

Description of Related Art

FIG. 1A is an exemplary diagram showing construction of a conventional gravel-ballasted track and a filling material.

The gravel-ballasted track is formed by installing sleepers 5 on an upper surface of a gravel ballast 3 formed on a roadbed 1 and fastening rails 7 to the sleepers 5.

When a train operates on the rails 7, a problem of the overall deformation of the gravel-ballast occurs because the gravel (crushed stones) in the gravel ballast 3 may break or the gravel (crushed stones) may move toward the ballast shoulders due to the continuously applied train loads, and a problem of the settlement of the gravel-ballasted track due to water accumulation caused by infiltrating groundwater, rainwater, and the like into the roadbed 1 through the gravel ballast 3.

To reinforce the gravel ballast, in the case of FIG. 1A, vertical boreholes h are formed downward from an upper surface of the gravel ballast 3 around the sleepers 5.

Injection pipes 15 with discharge holes 13 are inserted into the vertical boreholes h, and a ballast stabilizing material 9 is injected through head parts 11 of the injection pipes 15.

The ballast stabilizing material 9 is injected into gaps within the gravel ballast 3 and solidified.

Therefore, while there is the advantage of reinforcing the gravel ballast without separately replacing the existing gravel ballast, there is a limitation in constructability and difficult maintenance after construction because the injection pipes 15 should be individually installed through the vertical boreholes h.

FIG. 1B is an exemplary diagram showing construction of rebar meshes 31, 32 for ballast reinforcement used in the conventional gravel-ballasted track.

In the gravel ballast 3, gravel particles 2 constructed on the roadbed 1 naturally form the sloped ballast shoulder. However, deformation of the ballast shoulder gravel (crushed stones) may occur due to the train load transmitted through the sleepers and rails, which are not shown. Therefore, the gravel ballast 3 may need reinforcement.

FIG. 1B shows that, to reinforce the ballast shoulder, the rebar meshes 31, 32 for ballast reinforcement are manufactured in a rectangular cuboid shape, are filled with the gravel 2 (crushed stones), are stacked on each other in an inclined manner to be in contact with the ballast shoulder, and are fixed by a vertical fixing bracket 35 and angle brackets 39, 41.

FIG. 1C is another exemplary diagram of a rebar mesh 40 for ballast reinforcement using an injection pipe 20 in the conventional gravel-ballasted track.

That is, the rebar mesh 40 for ballast reinforcement is filled with gravel particles (crushed stones), an injection material is injected through the injection pipe 20, and the gravel particles 2 are bound together through the solidification of the injection material.

The rebar mesh 40 for ballast reinforcement, filled with the gravel particles 2 solidified by the injected injection material, may be positioned under the sleepers, or may be used as the gravel ballast 30 itself.

Therefore, it is shown that the injection material is injected into the rebar mesh 40 for ballast reinforcement through the injection pipe 20, and a plurality of injection ports 41 are formed separately in the rebar mesh 40 for ballast reinforcement.

The injection pipes 20 are set into the rebar mesh 40 for ballast reinforcement and the injection material may be injected into gaps between the previously filled gravel particles (crushed stones) inside the rebar mesh 40 for ballast reinforcement at a high pressure.

However, as insertion resistance from the gravel particles 2 is unavoidable during the process of inserting the injection pipe 20 in the rebar mesh 40 for ballast reinforcement into the gravel particles 2, the injection quality of the injection material may vary significantly depending on construction.

Therefore, defects may occur when using a method of inserting a pipe-shaped injection pipe 20 into the gravel particles 2. As the rebar mesh 40 for ballast reinforcement should be manufactured in a usable bag-shape when the plurality of injection ports 41 are installed, costs can inevitably increase.

FIG. 1D is an exemplary diagram showing construction of a drainage plate 50 installed on a ballast shoulder of the conventional gravel-ballasted track.

Generally, when a gravel shoulder is used, rainwater, groundwater, and the like inevitably infiltrate into gaps between gravel particles (crushed stones). To prevent deformation of ballast shoulder of the gravel-ballast, a fence 60 is additionally installed to confine the gravel particles (crushed stones).

In this case, the drainage plate 50 is formed at a lower end of the fence 60 to be exposed to filter fine particles when surrounding rainwater and the like infiltrates into gaps between the gravel particles (crushed stones). However, this can only be applied when the drainage plate 50 is installed on the fence.

PATENT DOCUMENTS

• (Patent Document 1) Japanese Patent No. 3473998 (Title of Invention: Method of Reinforcing Track Foundation, Publication Date: Mar. 19, 1996)
• (Patent Document 2) Korean Laid-open Patent No. 10-2010-0017217 (Title of Invention: Ballast Retainer and Guideway Track, Publication Date: Feb. 16, 2010)
• (Patent Document 3) Japanese Laid-open Patent No. 8-189002 (Title of Invention: Structure for Ballast Reinforcement and Method of Reinforcing Ballast, Publication Date: Jul. 23, 1996)
• (Patent Document 4) Korean Laid-open Patent No. 10-2018-0065444 (Title of Invention: Method of Stabilizing Gravel Ballast for Railways, Publication Date: Jun. 18, 2018)
• (Patent Document 5) Korean Laid-open Patent No. 10-2014-0143570 (Title of Invention: Fence Structure for Preventing Lateral Movement of Ballast Gravel on Guideway Tracks and Method Therefor, Publication Date: Dec. 17, 2014)

SUMMARY

The present disclosure is directed to providing a prefabricated wire mesh assembly for a ballast, which is capable of facilitating maintenance for subsidence due to water accumulation on the roadbed and facilitating drainage pipe installation by being assembled into a box-shape directly on-site in a prefabricated manner and having a drainage pipe, which is pre-installed at the bottom of the wire mesh assembly, to prevent rainwater and the like from infiltrating into the gravel ballast and from being introduced into the roadbed, and a method of constructing a gravel-ballasted track using the same.

The present disclosure is also directing to providing a prefabricated wire mesh assembly for a ballast with further improved injection efficiency by additionally installing an internal partition wall in an internal space(S) and allowing a filling material to be injected through injection pipes, which is installed on the internal partition wall, so that no additional installation of separate injection pipes is necessary, and a method of constructing a gravel-ballasted track using the same.

Furthermore, the present disclosure is directing to providing a prefabricated wire mesh assembly for a ballast, which is capable of facilitating construction of a gravel-ballasted track without forming a separate ballast shoulder by preventing the outflow of gravel by controlling the movement of gravel through the internal partition wall on which the injection pipes are installed, and a method of constructing a gravel-ballasted track using the same.

According to an aspect of the present disclosure, there is provided a prefabricated wire mesh assembly for a ballast of the present disclosure including a lower mesh including a bottom mesh, which is a horizontal mesh to form a bottom portion of a box-shaped prefabricated wire mesh assembly for a ballast, and side-wall meshes, which are horizontal meshes to form side portions of the box-shaped prefabricated wire mesh assembly for a ballast on edges of the bottom mesh, and an injection pipe which is horizontally disposed on each of the side wall meshes and is erected and installed along with the side-wall meshes when the side-wall meshes are erected and installed, wherein the injection pipe installed on the side-wall meshes is installed before an internal space of the prefabricated wire mesh assembly for a ballast is filled with gravel particles (crushed stones) to be installed.

According to another aspect of the present disclosure, there is provided a method of constructing a gravel-ballasted track using a prefabricated wire mesh assembly for a ballast including an operation (a) of manufacturing a lower mesh including a bottom mesh and a side-wall mesh and bringing the lower mesh to a site, an operation (b) of installing a drainage pipe on the bottom mesh and horizontally installing an injection pipe on the side-wall mesh, forming an internal space by erecting the injection pipe and the side-wall mesh, which are horizontally set, together, and assembling the lower mesh into a box shape with an open top, an operation (c) of manufacturing a prefabricated wire mesh assembly for a ballast in a box shape with an open top by installing an internal partition wall, on which the injection pipe is installed, in the internal space and fixing the internal partition wall to the lower mesh to allow the internal partition wall to partition the internal space, an operation (d) of installing the box-shaped prefabricated wire mesh assembly with an open top on a roadbed, and an operation (e) of filling the partitioned internal space of the box-shaped prefabricated wire mesh assembly for a ballast with an open top, which is installed on the roadbed, with the gravel particles (crushed stones) and injecting the filling material through the injection pipe so that the filling material fills gaps between the gravel particles (crushed stones) and is solidified.

BRIEF DESCRIPTION OF THE DRAWINGS

The above and other objects, features and advantages of the present disclosure will become more apparent to those of ordinary skill in the art by describing exemplary embodiments thereof in detail with reference to the accompanying drawings, in which: FIG. 1A is an exemplary diagram showing construction of a conventional gravel-ballasted track and an injection material;

FIG. 1B is an exemplary diagram showing construction of rebar meshes for ballast reinforcement used in the conventional gravel-ballasted track;

FIG. 1C is another exemplary diagram of a rebar mesh for ballast reinforcement using an injection pipe in the conventional gravel-ballasted track;

FIG. 1D is an exemplary diagram showing construction of a drainage plate installed on a ballast shoulder of the conventional gravel-ballasted track;

FIGS. 2A, 2B, 2C, 2D, and 2E are exemplary diagrams showing the assembly sequence of the prefabricated wire mesh assembly for a ballast of the present disclosure; and

FIG. 3 is an exemplary diagram of a gravel-ballasted track (A) constructed by a method of constructing the gravel-ballasted track (A) using the prefabricated wire mesh assembly for a ballast of the present disclosure.

DESCRIPTION OF THE EMBODIMENTS

Hereinafter, the embodiments of the present disclosure will be described in detail with reference to the accompanying drawings so that those skilled in the art can easily carry out the disclosure. However, the present disclosure can be implemented in various forms and is not limited to the embodiments described herein. In the drawings, parts irrelevant to the description will be omitted to clearly explain the embodiments of the present disclosure, and similar reference numerals are used for similar parts throughout the specification.

Throughout the specification, when a part is referred to as “comprising” a component, it means that the part may further include other components without excluding another component, unless specifically stated otherwise.

[Prefabricated Wire Mesh Assembly 100 for a Ballast of the Present Disclosure]

FIGS. 2A, 2B, 2C, 2D, and 2E are exemplary diagrams showing the assembly sequence of a prefabricated wire mesh assembly 100 for a ballast of the present disclosure.

The prefabricated wire mesh assembly 100 for a ballast, for example, allows for a lower mesh 110 to be brought to a site and assembled into a rectangular parallelepiped-shaped rebar box in a prefabricated manner.

Referring to FIG. 2D, injection pipes 120 are pre-installed on side-wall meshes 112 of the lower mesh 110 so that the injection pipes 120 are positioned upright on side portions of the prefabricated wire mesh assembly 100 for a ballast in the completed state.

An internal partition wall 130 is then additionally erected in the lower mesh 110 set to be erected along with the injection pipes 120.

Gravel particles 210 (crushed stones) are filled and partitioned by the internal partition wall 130 to prevent the gravel particles 210 (crushed stones) from moving toward sides due to applied loads, so there is no need to construct a separate ballast shoulder A2 in the prefabricated wire mesh assembly 100 for a ballast.

When the internal partition wall 130, on which the injection pipes 120 are pre-installed, is installed, the internal partition wall 130 is installed together with the injection pipes 120, and thus separate injection pipes 120 may not be installed, and a plurality of injection pipes 120 may not be installed in the prefabricated wire mesh assembly 100 for a ballast.

Since the required number of injection pipes 120 may be installed without additional installation of the injection pipes 120, a filling material 220 can be effectively injected into the gaps between the gravel particles 210 (crushed stones). Since the gravel particles 210 (crushed stones) can be stabilized though the internal partition wall 130, the injection efficiency of the filling material 220 can be maximized.

Since an upper portion of the box-shaped prefabricated wire mesh assembly 100 for a ballast is open, sleepers 230 and rails 240 are installed after the upper portion is finished with a top mesh 140, and thus a gravel-ballasted track A can be constructed and maintained.

The drainage pipes 150 are additionally installed on the side-wall meshes 112 of the lower mesh 110 to prevent rainwater and the like from infiltrating into the gravel ballast and being introduced into the roadbed, thereby preventing roadbed settlement due to water accumulation.

Referring to FIG. 2D, the prefabricated wire mesh assembly 100 for a ballast is formed in a box shape and includes the lower mesh 110, the injection pipes 120, the internal partition wall 130, the top mesh 140, and the drainage pipe 150. The manufacturing sequence is as follows.

First, as shown in FIG. 2A, the lower mesh 110 is prepared. The injection pipes 120 are installed horizontally on the side-wall meshes 112 of the lower mesh 110.

Since the lower mesh 110 is previously manufactured in a factory and the like and laid out flat, the lower mesh 110 can be easily transported while stacked and can be assembled into a box shape on-site in a prefabricated manner. For instance, a bottom mesh 111 and the side-wall meshes 112, which are horizontal rebar meshes, may be included.

Referring to FIGS. 2A and 2D, the bottom mesh 111 is a rectangular horizontal mesh to form a bottom portion of the prefabricated wire mesh assembly 100 for a ballast.

Next, referring to FIGS. 2A and 2D, the side-wall meshes 112 are rectangular horizontal meshes to form side portions of the prefabricated wire mesh assembly 100 for a ballast on edges of the bottom mesh 111.

Referring to FIG. 2A, the four side-wall meshes 112 are integrally formed with the bottom mesh 111. The bottom mesh 111 and the side-wall meshes 112 are integrally formed, and the side-wall meshes 112 may be bent and vertically erected for installation.

To facilitate vertical installation, the bottom mesh 111 and the side-wall meshes 112 may be separately manufactured and connected by thin wires or the like.

Furthermore, referring to FIG. 2A, the drainage pipe 150 is additionally disposed horizontally on the bottom mesh 111 so as not to interfere with the injection pipes 120.

Referring to FIG. 2D, the top mesh 140 of the prefabricated wire mesh assembly 100 for a ballast allows rainwater and the like, introduced into the gravel-ballast, to be introduced along an upper surface of the roadbed without directly infiltrating into the roadbed under the gravel ballast.

The drainage pipe 150 includes a non-woven fabric covering a perforated pipe to filter foreign materials to guide rainwater and the like to be drained to the outside of the gravel ballast along an upper surface of the roadbed.

Also, referring to FIG. 2A, for example, both side-wall meshes 112, facing each other, are disposed horizontally so that the injection pipes 20 are also erected while the side-wall meshes 112 are erected.

The injection pipes 120 are installed before an internal space S is filled with the gravel particles 210 (crushed stones) so that the gravel particles 210 (crushed stones) are inserted without insertion resistance, and the filling material 220 may be injected into the injection pipes 120.

Since the injection pipes 120 have pipe shapes and are set vertically to be inserted into gaps between the gravel particles 210 (crushed stones) without insertion resistance, the insertion pipes 120 may have discharge holes 121 spaced apart from each other.

Next, as shown in FIG. 2B, the injection pipes 120 installed on the side-wall meshes 12 of the lower mesh 110 are installed along with the side-wall meshes 112, so the top of the prefabricated wire mesh assembly 100 for a ballast is open, and the internal space S of the prefabricated wire mesh assembly 100 for a ballast is formed.

The bottom mesh 111 and the side-wall meshes 112 are integrally manufactured, and then the side-wall meshes 112 are bent, and the prefabricated wire mesh assembly 100 for a ballast may be installed to be erected vertically. The bottom mesh 111 and the side-wall meshes 112 may be connected by thin steel wires to easily erect the prefabricated wire mesh assembly 100 for a ballast vertically.

When only the side-wall meshes 112 are erected vertically, the internal space S, which is formed by the bottom mesh 111 and the four side-wall meshes 112, are filled with gravel particles 210 (crushed stones), and the top of the prefabricated wire mesh assembly 100 for a ballast may be open.

In this case, since the injection pipes 120 are pre-installed on the side-wall meshes, when only the side wall meshes 112 are erected vertically, the injection pipes 120 are also naturally erected, the injection is performed without installation of separate injection pipes, and thus the injection efficiency of the filling material 220 can be increased.

Although it is illustrated that the injection pipes 120 are installed on the two opposing side-wall meshes 112 as a reference, it is naturally possible to install the injection pipes 120 on at least one of the side-wall meshes 112. Also, the injection pipes 120 may be further installed using the internal partition wall 130 that will be described below.

As shown in FIG. 2C, the internal partition wall 130 is further installed in the internal space S to be erected with the injection pipes 120 to partition the internal space S.

While the injection pipes 120 are installed by arranging the side-wall meshes 112 of the lower mesh 110 along the edges of the bottom mesh 111, the internal partition wall 130 allows the injection pipes 120 to be additionally installed within the internal space S and partitions the internal space S filled with the gravel particles 210 (crushed stones).

Referring to FIG. 2C, the internal partition wall 130 is, for example, a vertical mesh having the same height as the side-wall mesh 112. A lower portion of the internal partition wall 130 is connected with the bottom mesh 111, and side portions of the internal partition wall 130 are connected with the side-wall meshes 112, and thus the internal space S may be naturally partitioned.

Also, similar to the injection pipes 120 pre-installed on the side-wall meshes 112, the injection pipes 120 may be additionally installed vertically to the internal partition wall 130 before the internal space S is filled with the gravel particles 210 (crushed stones), thus allowing the injection of the filling material 220.

Since the deformation of gravel ballast occurs toward the ballast shoulder A2 due to loads applied to the gravel particles 210 (crushed stones) filling the internal space S of the prefabricated wire mesh assembly 100 for a ballast, as shown in FIG. 1B, the rebar meshes filled with the gravel may be stacked to reinforce the ballast shoulder A2.

However, in the case of the present disclosure, the internal space S is partitioned by the internal partition wall 130, and the gravel particles 210 (crushed stones) filling the partitioned internal space S may be reinforced by the internal partition wall 130 against deformation due to the applied loads.

Therefore, when the prefabricated wire mesh assembly 100 for a ballast of the present disclosure is used, the internal partition wall 130 controls movement of the gravel particles to prevent the outflow of the gravel particles (crushed stones), and thus the gravel-ballasted track can be constructed without forming a separate ballast shoulder A2.

As shown in FIG. 2D, the partitioned internal space S of the prefabricated wire mesh assembly 100 for a ballast is filled with the gravel particles 210 (crushed stones), and the filling material 220 is injected into the gaps between the gravel particles 210 (crushed stones) through the injection pipes 120.

The partitioned internal space S is formed by the internal partition wall 130, and the injection pipes 120 formed on the internal partition wall 130 and the side-wall meshes 112 of the lower mesh 110 have a plurality of discharge holes 121.

A head part of the injection pipe 120 is formed to be exposed at an upper surface of the prefabricated wire mesh assembly 100 for a ballast, and the internal space S is filled with the gravel particles 210 (crushed stones) in a state in which the injection pipes 120 are installed, and thus the filling material 220 can be effectively injected into the gaps between the gravel particles 210 (crushed stones) filling the internal space S through the head part of the injection pipe 120.

The filling material 220 includes various solidifying materials and is injected into the gaps between the gravel particles 210 (crushed stones) through the discharge holes 121 at high pressure. When the filling material 220 is solidified, the filling material 220 integrates with the gravel particles 210 (crushed stones), thereby ensuring load resistance performance against the applied loads.

As shown in FIG. 2E, after the filling material 220 is injected into the gaps between the gravel particles 210 (crushed stones), the top mesh 140 is installed on the open upper surface of the prefabricated wire mesh assembly 100 for a ballast to complete construction of the prefabricated wire mesh assembly 100 for a ballast.

Since the top mesh 140 is, for example, a horizontal rebar mesh, corresponding to the bottom mesh 111 of the lower mesh 110, and the internal space S is filled with the gravel particles 210 (crushed stones), the head part of the injection pipe 120 is installed to be exposed to the outside.

That is, the top mesh 140 is a horizontal mesh corresponding to the bottom mesh 111 of the lower mesh 110, the internal space S is filled with the gravel particles 210 (crushed stones), the head part of the injection pipe 120 is installed to be exposed to the outside, and sleepers 230 and rails 240 are disposed on an upper surface of the top mesh 140. Thus, the prefabricated wire mesh assembly 100 for a ballast may be used as a gravel ballast A1.

[Method of Constructing Gravel-Ballasted Track a Using the Prefabricated Wire Mesh Assembly 100 for a Ballast of the Present Disclosure]

FIG. 3 is an exemplary diagram showing a gravel-ballasted track A constructed by a method of constructing a gravel-ballasted track A using the prefabricated wire mesh assembly 100 for a ballast of the present disclosure.

As described above, in the gravel-ballasted track A, the lower mesh 110, which includes the bottom mesh 111 and the side-wall meshes 112, is manufactured and brought to the site.

The drainage pipe 150 is installed on the bottom mesh 111, the injection pipes 120 are horizontally installed on the side-wall meshes 112, and the injection pipes 120 and the side-wall meshes 112 are erected together, thereby forming the internal space S and assembling the box-shaped lower mesh 110 with an open top.

The internal partition wall 130 installed with the injection pipes 120 is inserted into the internal space S and is fixed to the lower mesh 110 to partition the internal space S, and thus the box-shaped prefabricated wire mesh assembly 100 with an open top is formed.

The box-shaped prefabricated wire mesh assembly 100 with an open top is installed on the roadbed.

After the partitioned internal space S of the box-shaped prefabricated wire mesh assembly 100 with an open top installed on the roadbed is filled with the gravel particles 210 (crushed stones), the filling material 220 is injected into the gaps between the gravel particles 210 (crushed stones) through the injection pipes 120 and is solidified.

After the top mesh 140 is installed on upper surfaces of the side-wall meshes 112 and the internal partition wall 130 so that the head part of the injection pipe 120 is exposed, the sleepers 230 and the rails may be constructed on the upper surface of the top mesh 140 to complete the assembly.

Furthermore, the gravel-ballasted track A can be maintained even in a method in which the gravel-ballasted track A is reconstructed after the gravel track of the existing gravel-ballasted track A is disassembled.

In an operation in which the lower mesh 110, which includes the bottom mesh 111 and the side-wall meshes 112, is formed and brought to the site,

the bottom mesh 111 is a rectangular horizontal mesh to form the bottom of the box-shaped prefabricated wire mesh assembly 100.

The side-wall meshes 112 are rectangular horizontal meshes to form side portions of the box-shaped prefabricated wire mesh assembly 100 along the four edges of the bottom mesh 111. The lower mesh 110, which includes the bottom mesh 111 and the side-wall meshes 112, is formed horizontally. The lower mesh 110 is highly effective for being loaded onto vehicles in large quantities and transported to the site by the vehicles, and thus it is advantageous for both manufacturing and transporting.

In an operation of installing the drainage pipe 150 on the bottom mesh 111, horizontally installing the injection pipes 120 on the side-wall meshes 112, erecting the horizontally set injection pipes 120 and the side-wall meshes 112 together to form the internal space S, and assembling the lower mesh 110 into a box shape with an open top, the drainage pipe 150 is formed by covering the perforated pipe with non-woven fabric to filter foreign materials, allowing the rainwater and the like to be directed outside the gravel ballast along the upper surface of the roadbed. The drainage pipe 150 may be disposed horizontally on the bottom mesh 111 so as not to interfere with the internal partition wall 130.

Also, the injection pipe 120 has a pipe shape with a plurality of discharge holes 121. The injection pipes 120 are initially horizontally set on the side-wall meshes 112, but are erected vertically when the side-wall meshes 112 are erected. Since the injection pipes 120 are installed before the filling of the gravel particles 210 (crushed stones), the injection pipes 120 may be installed without insertion resistance.

When the side-wall meshes 112 on which the injection pipes 120 are horizontally installed are erected, the lower mesh 110 is assembled into the box shape with an open top by arranging the side-wall meshes 112 along the bottom mesh 111, and thus the internal space S is naturally formed.

In the operation of inserting the internal partition wall 130, in which the injection pipes 120 are installed, into the internal space S, fixing the internal partition wall 130 to the lower mesh 110 to allow the internal partition wall 130 to partition the internal space S, and completing the box-shaped prefabricated wire mesh assembly 100 with an open top, the internal partition wall 130 may allow the injection pipes 120 to be further installed in the internal space S, and may be, for example, a vertical rebar mesh to partition the gravel particles 210 (crushed stones) in the internal space S.

In this case, the internal partition wall 130 has the same vertical height as the bottom mesh 111. A lower portion of the internal partition wall 130 is connected with the bottom mesh 111, and the side portions of the internal partition wall 130 are connected with the side-wall meshes 12, and thus the internal space S is naturally formed.

Also, the injection pipes 120 are further set on the internal partition wall 130 vertically to allow the filling material 220 to be injected into the partitioned internal space S.

Therefore, the plurality of internal partition walls 130, on which the injection pipes 120 are further installed, are installed in the internal space S of the box-shaped prefabricated wire mesh assembly 100 with an open top, and the drainage pipe 150 is installed on the bottom of the internal space S.

Next, in an operation of installing the box-shaped prefabricated wire mesh assembly 100 with an open top on a roadbed, typically, the gravel ballast track is formed by installing and compacting gravel on the roadbed to form ballast shoulder A2 and installing sleepers and rails on an upper portion of the roadbed, wherein the roadbed 250 is constructed by compacting soil and the like in a gravel ballast track.

In the present disclosure, the box-shaped prefabricated wire mesh assembly 100 with an open top can be reinforced by being filled with the gravel particles 210 (crushed stones) and injected with the filling material 220.

The roadbed 250 is in contact with the drainage pipe 150 of the box-shaped prefabricated wire mesh assembly 100 with an open top to guide rainwater and the like, infiltrating into the gravel ballast A1 from the upper surface of the roadbed 250, to be drained through the drainage pipe 150 without water accumulation.

In an operation of filling the partitioned internal space S of the box-shaped prefabricated wire mesh assembly 100 with an open top installed on the roadbed with the gravel particles 210 (crushed stones), injecting the filling material 220 through the injection pipes 120, and filling the gaps between the gravel particles 210 (crushed stones) with the filling material 220 and solidifying the filling material 220, the injection pipes 120 are set up first before the partitioned internal space S of the prefabricated wire mesh assembly 100 for a ballast is not previously filled with the gravel particles 210 (crushed stones).

Therefore, compared to the case in which the injection pipes 120 are inserted after the internal space S is filled with the gravel particles 210 (crushed stones), the injection efficiency of the filling material 220 can be maximized without installation resistance of the injection pipes 120.

Washed gravel, crushed stones, and the like may be used as the gravel particles 210 (crushed stones). The partitioned internal space S of the box-shaped prefabricated wire mesh assembly 100 with an open top installed on the roadbed is filled with the gravel particles 210.

In this case, the side-wall meshes 112 of the lower mesh 110 and the internal partition wall 130, on which the injection pipes are installed, allow the movement of the gravel particles 210 (crushed stones) to be controlled, thereby preventing the outflow of the gravel particles 210 (crushed stones), and thus the gravel-ballasted track can be constructed without forming a separate ballast shoulder A2.

Also, the filling material 220 includes various solidifying materials, the filling material 220 is injected into the gaps between the gravel particles 210 (crushed stones) through the discharge holes 121 of the injection pipes 120 of the internal partition wall 130 and the side-wall meshes 112 of the lower mesh 110 at high pressure, and is solidified to integrate with the gravel particles 210 (crushed stones), thereby ensuring load resistance performance for the applied loads.

Next, in an operation of installing the top mesh 140 on the upper surfaces of the side-wall meshes 112 and the internal partition wall 130 so that the head parts of the injection pipes 120 are exposed, and constructing the sleepers 230 and the rails 240 on the upper surface of the top mesh 140 to complete construction, the top mesh 140, which is a horizontal mesh corresponding the bottom mesh 111 of the lower mesh 110, the head parts of the injection pipes 120 in the internal space S, filled with the gravel particles 210 (crushed stones), are installed to be exposed to the outside, and the sleepers 230 and the rails 240 are disposed on the upper surface of the top mesh 140, and thus the prefabricated wire mesh assembly 100 for a ballast can be used as a gravel ballast A1.

Since the prefabricated wire mesh assembly for a ballast of the present disclosure can be brought to the site in an unfolded state and can be set up on-site by being assembled into a box shape, the prefabricated wire mesh assembly for a ballast can be easily transported and brought to the site. Therefore, provided are the prefabricated wire mesh assembly for a ballast, which can be more economically and efficiently manufactured and transported, and the method of constructing the gravel-ballasted track using the same.

Also, since the prefabricated wire mesh assembly for a ballast of the present disclosure can be installed along with the injection pipes and assembled using the lower mesh and the internal partition wall, the filling material can be injected without installation of a plurality of separate injection pipes. Since the plurality of injection pipes are installed, the injection efficiency of the filling material can be increased. Therefore, provided are the prefabricated wire mesh assembly for a ballast, which can be advantageous for securing construction quality, and the method of constructing the gravel-ballasted track using the same.

Also, since a drainage pipe is previously set vertically on the bottom, the prefabricated wire mesh assembly for a ballast of the present disclosure prevents rainwater and the like from infiltrating into the gravel ballast and being introduced into the roadbed. Therefore, provided are the prefabricated wire mesh assembly for a ballast, which can be easily maintained and allow the drainage pipe to be easily installed by preventing subsidence due to water accumulation on the roadbed, and the method of constructing the gravel-ballasted track using the same.

Also, in the prefabricated wire mesh assembly for a ballast of the present disclosure, the internal partition wall controls movement of gravel to prevent the outflow of gravel. Therefore, provided are the prefabricated wire mesh assembly for a ballast, which allows a gravel-ballasted track to be constructed without forming a separate ballast shoulder, and the method of constructing the gravel-ballasted track using the same.

The above description of the present disclosure is intended to be illustrative, and those of ordinary skill in the art to which the present disclosure pertains will understand that various modifications can be made without departing from the technical spirit or essential features of the present disclosure. Therefore, the above-described embodiments should be considered only as examples in all aspects and not for purposes of limitation. For example, each component described as singular may be implemented in a distributed manner, and similarly, components described as being distributed may be implemented in a combined form.

The scope of the present disclosure is defined by the following claims rather than the detailed description above, and all modifications or variations derived from the meaning and scope of the claims and their equivalents should be interpreted as being included within the scope of the present disclosure.