Prefabricated wire mesh assembly for ballast and method of constructing gravel-ballasted track using the same

Patent metadata

Field	Value
Publication number	US-2025116071-A1
Application number	US-202418908833-A
Country	US
Kind code	A1
Filing date	Oct 8, 2024
Priority date	Oct 10, 2023
Publication date	Apr 10, 2025
Grant date	—

Abstract

Disclosed are a prefabricated wire mesh assembly for a ballast and a method of constructing a gravel-ballasted track using the same. When a gravel ballast is used by filling a box-shaped rebar mesh with crushed stones and injecting a filling material, the prefabricated wire mesh assembly increases injection efficiency by further installing an internal partition wall to effectively support loads without forming a separate ballast shoulder and injecting a filling material through injection pipes installed on an internal partition wall, and prevents water accumulation on a roadbed by a drainage pipe. The prefabricated wire mesh assembly for a ballast is assembled by installing the injection pipe along with the lower mesh and the internal partition wall, thereby allowing the filling material to be injected without installation of a plurality of separate injection pipes, and securing construction quality by increasing injection efficiency of the filling material through the installed injection pipes.

First claim

What is claimed is:

1 . A prefabricated wire mesh assembly for a ballast, the assembly comprising:
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 to be installed in the gravel particles without insertion resistance.

2 . The assembly of claim 1 , wherein a drainage pipe is further disposed horizontally on the bottom mesh without interference with the injection pipe to guide rainwater introduced into a gravel ballast to be drained on an upper surface of a roadbed without directly infiltrating into the roadbed under the gravel ballast.

3 . The assembly of claim 1 , further comprising an internal partition wall which is a vertical mesh having the same vertical height as the side-wall mesh,
wherein a lower portion of the internal partition wall is connected with the bottom mesh, and side portions of the internal partition wall are connected with the side-wall meshes to partition the internal space.

4 . The assembly of claim 3 , wherein the injection pipe is further pre-set vertically on the internal partition wall for the injection pipe to be inserted into the gravel particles and installed in the partitioned internal space without insertion resistance.

5 . The assembly of claim 4 , wherein the internal partition wall controls movement of the gravel particles filling the internal space to prevent outflow of the gravel particles for a gravel-ballasted track to be constructed without forming a ballast shoulder of the prefabricated wire mesh assembly for a ballast.

6 . The assembly of claim 1 , wherein the injection pipe includes a pipe in which the discharge holes are formed,
a filling material injected into the injection pipe is solidified by including the solidifying material filling gaps between the gravel particles through the discharge holes, and the drainage pipe includes non-woven fabric that covers a perforated pipe to filter a foreign material.

7 . The assembly of claim 6 , further comprising a top mesh which is a horizontal mesh installed so that a head part of the injection pipe installed on the internal partition wall and the lower mesh is exposed to an outside,
wherein a sleeper and a rail are disposed on an upper surface of the top mesh for the prefabricated wire mesh assembly for a ballast to be used as a gravel ballast.

8 . A method of constructing a gravel-ballasted track using a prefabricated wire mesh assembly for a ballast, the method comprising:
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 and injecting the filling material through the injection pipe so that the filling material fills gaps between the gravel particles and is solidified.

9 . The method of claim 8 , wherein the bottom mesh in the operation (a) is a rectangular horizontal mesh to form a bottom portion of the box-shaped prefabricated wire mesh assembly for a ballast, and
the side-wall meshes in the operation (a) are rectangular horizontal meshes to form side portions of the box-shaped prefabricated wire mesh assembly for a ballast and are formed on edges of the bottom mesh.

10 . The method of claim 8 , wherein the drainage pipe in the operation (b) allows rainwater and the like to be drained to the outside of the gravel ballast along an upper surface of the roadbed by filtering foreign materials by covering a perforated pipe with non-woven fabric and is horizontally disposed on the bottom mesh to prevent interference with the internal partition wall.

11 . The method of claim 10 , wherein the injection pipe in the operation (b) has a pipe shape with a plurality of discharge holes, is initially set horizontally on the side-wall mesh and then is vertically erected when the side-wall mesh is erected, and is installed before the internal space is filled with the gravel particles so that the injection pipe is installed without insertion resistance due to the gravel, and
the side-wall mesh, on which the injection pipe is horizontally installed, is erected to form the internal space using the side-wall mesh around the bottom mesh so that the lower mesh is assembled into a box shape with an open top.

12 . The method of claim 8 , wherein the roadbed in the operation (d) is in contact with the drainage pipe of the box-shaped prefabricated wire mesh assembly for a ballast with an open top, and
the drainage pipe guides rainwater, which infiltrates into the gravel ballast from an upper surface of the roadbed, to be drained without water accumulation.

13 . The method of claim 8 , wherein the gravel particles in the operation (e) include washed gravel and crushed stones, and fill the partitioned internal space of the box-shaped prefabricated wire mesh assembly for a ballast with an open top installed on the roadbed to allow the side-wall mesh of the lower mesh and the internal partition wall, on which the injection pipe is installed, to control movement of the gravel to prevent outflow of the gravel so that the gravel-ballasted track is constructed without forming a separate ballast shoulder.

14 . The method of claim 8 , further comprising an operation (f) of installing a top mesh on an upper surface of the internal partition wall and the side-wall mesh so that a head part of the injection pipe is exposed, and constructing sleepers and rails on an upper surface of the top mesh for completion,
wherein the top mesh, which is a horizontal mesh corresponding to the bottom mesh of the lower mesh, is a horizontal mesh installed so that the head part of the injection pipe is exposed to an outside because the internal space is filled with the gravel particles, and the sleepers and the rails are disposed on an upper surface of the top mesh so that the prefabricated wire mesh assembly for a ballast is used as a gravel ballast.

Assignees

• Korea Railroad Res Institute

Inventors

• LEE Seong-Hyeok
• Bae Young Hoon
• Kim Hyun Ki
• Choi Chan Yong

Classifications

• E01B2204/07

  Drainage · CPC title

• E01B2203/06

  Placing ballast · CPC title

• E01B1/008 Primary

  Drainage of track · CPC title

• E01B37/00

  Making, maintaining, renewing, or taking-up the ballastway or the track, not provided for in a single one of groups E01B27/00 - E01B35/00 · CPC title

• E01B27/00

  Placing, renewing, working, cleaning, or taking-up the ballast, with or without concurrent work on the track; Devices therefor; Packing sleepers · CPC title