CN114411454A - Grid structure for remedying sinking of ballast of existing operation railway and construction method - Google Patents
Grid structure for remedying sinking of ballast of existing operation railway and construction method Download PDFInfo
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- CN114411454A CN114411454A CN202210097392.2A CN202210097392A CN114411454A CN 114411454 A CN114411454 A CN 114411454A CN 202210097392 A CN202210097392 A CN 202210097392A CN 114411454 A CN114411454 A CN 114411454A
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- 238000010276 construction Methods 0.000 title claims description 15
- 239000004746 geotextile Substances 0.000 claims abstract description 25
- 239000010410 layer Substances 0.000 claims abstract description 14
- 239000002245 particle Substances 0.000 claims abstract description 8
- 239000002344 surface layer Substances 0.000 claims abstract description 5
- 239000004743 Polypropylene Substances 0.000 claims description 12
- -1 polypropylene Polymers 0.000 claims description 12
- 229920001155 polypropylene Polymers 0.000 claims description 12
- 229920000642 polymer Polymers 0.000 claims description 11
- 238000004080 punching Methods 0.000 claims description 11
- 239000004576 sand Substances 0.000 claims description 10
- 244000025254 Cannabis sativa Species 0.000 claims description 7
- 229910000831 Steel Inorganic materials 0.000 claims description 7
- 239000010959 steel Substances 0.000 claims description 7
- 238000005507 spraying Methods 0.000 claims description 6
- 238000005520 cutting process Methods 0.000 claims description 4
- 238000012216 screening Methods 0.000 claims description 2
- 238000010438 heat treatment Methods 0.000 claims 1
- 238000012423 maintenance Methods 0.000 description 7
- 238000000034 method Methods 0.000 description 6
- 201000010099 disease Diseases 0.000 description 4
- 208000037265 diseases, disorders, signs and symptoms Diseases 0.000 description 4
- 230000009471 action Effects 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000010008 shearing Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 238000009412 basement excavation Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 239000002657 fibrous material Substances 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
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- 238000012986 modification Methods 0.000 description 1
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- 238000005096 rolling process Methods 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 208000024891 symptom Diseases 0.000 description 1
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01B—PERMANENT WAY; PERMANENT-WAY TOOLS; MACHINES FOR MAKING RAILWAYS OF ALL KINDS
- E01B1/00—Ballastway; Other means for supporting the sleepers or the track; Drainage of the ballastway
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01G—HORTICULTURE; CULTIVATION OF VEGETABLES, FLOWERS, RICE, FRUIT, VINES, HOPS OR SEAWEED; FORESTRY; WATERING
- A01G20/00—Cultivation of turf, lawn or the like; Apparatus or methods therefor
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01B—PERMANENT WAY; PERMANENT-WAY TOOLS; MACHINES FOR MAKING RAILWAYS OF ALL KINDS
- E01B2/00—General structure of permanent way
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
- E01C11/00—Details of pavings
- E01C11/22—Gutters; Kerbs ; Surface drainage of streets, roads or like traffic areas
- E01C11/221—Kerbs or like edging members, e.g. flush kerbs, shoulder retaining means ; Joint members, connecting or load-transfer means specially for kerbs
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D17/00—Excavations; Bordering of excavations; Making embankments
- E02D17/20—Securing of slopes or inclines
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A30/00—Adapting or protecting infrastructure or their operation
- Y02A30/60—Planning or developing urban green infrastructure
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- Structural Engineering (AREA)
- Architecture (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
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- General Engineering & Computer Science (AREA)
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Abstract
The invention provides a grid structure for remedying the sinking of railway ballasts of an existing operating railway, wherein a foundation bed grid is laid between the bottom layer of the railway ballast and the surface layer of a foundation bed of a roadbed; the foundation bed grid is connected with the foundation bed grid through a connecting rod, thermal bonding geotextile is laid under the foundation bed grid, and the thermal bonding geotextile is connected with the foundation bed grid; the road shoulder grids are arranged on two sides of the foundation bed grids in the direction perpendicular to the line direction, and the road shoulder grids are connected with the foundation bed grids through connecting rods; the side slope grids are arranged on two sides of the road shoulder grids perpendicular to the line direction, and the side slope grids are connected with the road shoulder grids through connecting rods. The invention solves the problem of the existing operation railway caused by the sinking of the railway ballast, improves the bearing capacity of the foundation bed, prolongs the service cycle of the railway bed, effectively ensures the quality and stability of the railway ballast particles and eliminates the potential safety hazard of railway driving.
Description
Technical Field
The invention belongs to the technical field of railway tracks, and particularly relates to a grid structure for remedying sinking of railway ballasts of an existing operation railway and a construction method.
Background
The railway ballast sinking is one of four diseases of the existing railway in China, and as the old railway is long-term and has different technical standards, the roadbed filling in contact with the ballast bottom layer has the characteristics of insufficient bearing capacity, poor water permeability, unsmooth transverse drainage and the like. After the railway roadbed bed is softened by water to a certain degree, railway ballast can be squeezed below the roadbed bed surface under the repeated action of train load to form a railway ballast bag or a railway ballast groove, the railway roadbed can generate lateral shearing and sliding along with the crossing and deepening of the railway ballast, so that the phenomena of sinking of the railway bed, bulging of road shoulders or outward squeezing of side ditches and the like occur, and the railway ballast sinks to ensure that the railway driving safety has potential safety hazards.
At present, the method of longitudinal railway slope lifting, foundation bed replacement and filling, pipe pile treatment and the like is adopted for the sinking of the railway ballast of the existing railway in China, but the existing railway cannot be interrupted in operation and can only be constructed in skylight time, the skylight time is very short, and the skylight time of most of the operating railways is not more than 2 hours. Because the construction time of the skylight is short, the construction can be completed in time by the prior treatment technology, the symptoms and the root causes are treated but not treated after partial treatment, and after the railway resumes operation, the railway ballast sinks again under the action of repeated train load. The current processing scheme can not fundamentally solve the problem of sinking of railway ballast under the condition that railway operation can not be interrupted for a long time.
Disclosure of Invention
In order to solve the technical problems, the invention provides a grid structure for controlling the sinking of railway ballasts of the existing operation railway and a construction method thereof, which decompose the concentrated stress at the sinking position of the railway ballasts from point to surface, thoroughly solve the problems of diseases and various potential safety hazards caused by the sinking of the railway ballasts, improve the bearing capacity of a foundation bed, prolong the service life of the railway bed and eliminate the potential safety hazards of railway driving.
In order to achieve the purpose, the technical scheme adopted by the invention is as follows:
in a first aspect, the invention provides a grid structure for remedying sinking of ballast of an existing operation railway, which comprises a foundation bed grid, a road shoulder grid, a side slope grid and a connecting rod; the foundation bed grating is laid between the ballast bottom layer and the roadbed surface layer; the foundation bed grid is connected with the foundation bed grid through a connecting rod, thermal bonding geotextile is laid under the foundation bed grid, and the thermal bonding geotextile is connected with the foundation bed grid; the road shoulder grids are arranged on two sides of the foundation bed grids in the direction perpendicular to the line direction, and the road shoulder grids are connected with the foundation bed grids through connecting rods; the side slope grids are arranged on two sides of the road shoulder grids perpendicular to the line direction, and the side slope grids are connected with the road shoulder grids through connecting rods.
Preferably, the base bed grating is a square structure formed by punching and drawing a whole high polymer polypropylene plate, the side length of the square is 3.0-3.3 m, and the thickness of the square is 0.2-0.4 cm.
Preferably, a plurality of triangular mesh structures are arranged in the foundation bed grid, the side length of each triangular mesh structure is 3-5 cm, a sunken rectangular rib structure is arranged in each side length mesh, the triangular mesh and the mesh internal rectangular rib structures enable the triangular mesh and the mesh internal rectangular rib structures to inlay and restrain ballast particles, and concentrated stress of ballast sinking positions is decomposed from points to the surface.
Preferably, the curb grid is a rectangular structure formed by integrally punching and stretching a high polymer polypropylene plate, the length of the curb grid is matched with that of the foundation bed grid to be 3.0-3.3 m, the width of the curb grid is 0.8-1.0 m, and the thickness of the curb grid is 0.2-0.4 cm; a plurality of triangular mesh structures are arranged inside the road shoulder grating, the side length of each triangular mesh structure is 3-5 cm, and the insides of the side length meshes are of concave rectangular rib structures; and the roadbed grating is filled with broken stones.
Preferably, a cable trough is arranged below the shoulder grids.
Preferably, the side slope grating is a rectangular structure formed by integrally punching and stretching a high polymer polypropylene plate, the length of the side slope grating is matched with that of the curb grating to be 3.0-3.3 m, the width of the side slope grating is 0.6-0.9 m, and the thickness of the side slope grating is 0.2-0.4 cm; a plurality of triangular mesh structures are arranged inside the slope grating, the side length of each triangular mesh structure is 3-5 cm, and the insides of the side length meshes are of sunken rectangular rib structures.
Preferably, the connecting rod is made by cutting a finished steel bar with the diameter of 6-8 mm, and the length of the steel bar is 3.0-3.3 m.
Preferably, the thermally bonded geotextile is heated by a high-power hot air blower to be connected with the foundation grid.
In a second aspect, an embodiment of the present invention further provides a construction method for renovating a grid structure in which existing operation railway ballast sinks, where the method includes the following steps:
step S1, dismantling the railway track and removing ballast;
step S2, cleaning and leveling a roadbed at the sinking position of the railway ballast;
step S3, paving a sand cushion layer above the roadbed bed;
step S4, laying thermal bonding geotextile above the sand cushion layer;
step S5, paving a foundation bed grid on the thermal bonding geotextile, wherein the foundation bed grid is connected with the foundation bed grid through a connecting rod;
step S6, paving road shoulder grids on two sides of the foundation bed grid perpendicular to the line direction, connecting the foundation bed grid and the road shoulder grids through connecting rods, and filling broken stones in the road shoulder grids;
step S7, paving side slope grids on two sides of the road shoulder grids perpendicular to the line direction, connecting the road shoulder grids and the side slope grids through connecting rods, and spraying and planting grass in holes of the side slope grids;
and step S8, backfilling the railway ballast, tamping, compacting and re-paving the railway track.
The invention has the following beneficial effects:
according to the grid structure and the construction method for remedying the ballast subsidence of the existing operation railway, the foundation bed grid is laid between the foundation bed of the roadbed and the bottom layer of the ballast, and the concentrated stress at the diseased part of the roadbed is decomposed from point to surface, so that the concentrated stress is eliminated, and the settlement rate of the ballast is reduced. The foundation bed grating, the road shoulder grating and the side slope grating are connected to form a grating structure, the grating structure reinforces the road shoulder and the side slope of the roadbed, prevents potential safety hazards such as road shoulder external arch and side slope slippage caused by ballast sinking, and integrally solves various potential hazards caused by foundation bed sinking. Maintenance of the roadbed foundation bed (below the foundation bed grids), the cable trough (below the curb grids) and the side slope (below the side slope grids) can be completed respectively through disassembling of the grids in the maintenance stage, and maintenance efficiency is improved.
The invention also provides a construction and pavement method, the pavement time has obvious advantages, and the whole construction process can be completed by utilizing the skylight time. The invention thoroughly solves the problem of the diseases caused by the sinking of the railway ballast of the existing operation railway, improves the bearing capacity of the foundation bed, prolongs the service cycle of the railway bed, effectively ensures the quality and stability of the railway ballast particles and eliminates the hidden trouble of railway running.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below, and it is apparent that the drawings in the following description are only some embodiments of the present invention.
Fig. 1 is a cross-sectional view of a grid structure for remedying sinking of existing railway ballast according to an embodiment of the invention;
fig. 2 is a top view of a grid structure for remedying sinking of existing railway ballast according to an embodiment of the present invention.
Description of reference numerals:
1. a foundation bed grid; 2. a road shoulder grille; 3. a side slope grating; 4. a connecting rod; 5. thermally bonding the geotextile; 6. a sand cushion layer; 7. ballast; 8. a roadbed foundation bed; 9. and (4) a cable groove.
Detailed Description
In order to make the technical solutions of the present invention better understood, the present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.
The embodiment provides a grid structure for remedying the sinking of ballast of an existing operating railway, which comprises a foundation bed grid 1, a road shoulder grid 2, a side slope grid 3 and a connecting rod 4, as shown in fig. 1 and 2; the foundation bed grating is laid between the bottom layer of the ballast 7 and the surface layer of the roadbed 8; the foundation bed grid 1 is connected with the foundation bed grid 1 through a connecting rod 4, the thermal bonding geotextile 5 is laid under the foundation bed grid, and the thermal bonding geotextile 5 is heated through a high-power hot air blower to connect the thermal bonding geotextile 5 with the foundation bed grid 1; the road shoulder grids 2 are arranged on two sides of the foundation bed grid 1 perpendicular to the line direction, and the road shoulder grids 2 are connected with the foundation bed grid 1 through connecting rods 4; the side slope grids 3 are arranged on two sides of the road shoulder grids 2 perpendicular to the line direction, and the side slope grids 3 are connected with the road shoulder grids 2 through connecting rods 4.
The foundation bed grid 1 is a square structure formed by punching and stretching a high polymer polypropylene plate integrally, the side length of the square is 3.0-3.3 m, and the thickness of the square is 0.2-0.4 cm. A plurality of triangular mesh structures are arranged inside the foundation bed grid 1, the side length of each triangular mesh structure is 3-5 cm, a sunken rectangular rib structure is arranged inside each side length mesh, the triangular mesh and the rectangular rib structures in the meshes enable the triangular mesh and the rectangular rib structures in the meshes to inlay and restrain particles of the ballast 7, and the concentrated stress of the sinking position of the ballast 7 is decomposed from point to surface.
The road shoulder grating 2 is a rectangular structure formed by integrally punching and stretching a high polymer polypropylene plate, the length of the road shoulder grating 2 is matched with that of the foundation bed grating 1 to be 3.0-3.3 m, the width is 0.8-1.0 m, and the thickness is 0.2-0.4 cm; a plurality of triangular mesh structures are arranged inside the road shoulder grating 2, the side length of each triangular mesh structure is 3-5 cm, and the insides of the side length meshes are of concave rectangular rib structures; the roadbed grating 2 is filled with gravels with the particle size of 6 mm. The road shoulder grating 2 can improve the integral stability of grating combination, can improve the stability of the railway road shoulder and prevent the road shoulder from slipping; the lower side of the road shoulder grating 2 is provided with a cable groove 9, and the road shoulder grating 2 can be detached independently by drawing out the connecting rod 4 for maintaining and repairing cables in the cable groove 9.
The side slope grating 3 is a rectangular structure formed by integrally punching and stretching a high polymer polypropylene plate, the length of the side slope grating 3 is matched with that of the road shoulder grating to be 3.0-3.3 m, the width of the side slope grating is 0.6-0.9 m of the thick bottom of the roadbed, and the thickness of the side slope grating is 0.2-0.4 cm; a plurality of triangular mesh structures are arranged inside the slope grating 3, the side length of each triangular mesh structure is 3-5 cm, and the insides of the side length meshes are of sunken rectangular rib structures; and spraying and planting grass in the holes 3 of the side slope grating. The side slope grating 3 can improve the integral stability of grating combination, can prevent the shear slope of the railway from sliding, and the 3 holes of the side slope grating are sprayed with grass to improve the stability of the side slope and improve the attractiveness.
The connecting rod 4 is generally formed by cutting a finished product of Q235 smooth steel bar with the diameter of 6-8 mm, and the length of the steel bar is 3.0-3.3 m.
The embodiment also provides a construction method for renovating the grid structure sinking of the ballast of the existing operation railway, which comprises the following steps:
and step S1, dismantling the railway track and removing the ballast 7.
And (4) opening the railway skylight at a certain time, sinking the railway ballast to a section, dismantling the railway track, removing the railway ballast 7, and clearing the removed railway ballast 7.
And step S2, screening and leveling the roadbed 8 at the sinking position of the ballast 7.
And excavating the roadbed 8 at the position of the sunken ballast, backfilling the surface layer of the roadbed after the excavation, wherein the backfilling adopts qualified soil filling materials, and rolling and compacting are carried out.
Step S3, a sand cushion 6 is laid over the roadbed 8.
And paving a sand cushion 6 on the surface of the leveled roadbed 8, wherein the paving thickness of the sand cushion 6 is 10cm, and leveling after paving.
And step S4, laying thermal bonding geotextile 5 above the sand cushion layer 6.
And hot-sticking geotextile 5 is laid on the leveling sand cushion layer 6, the hot-sticking geotextile 5 is made of a short-fiber polypropylene fiber material, and the tensile strength is increased to more than 5 KN/m. And leveling after the thermal bonding geotextile 5 is laid.
Step S5, paving the foundation grid 1 on the thermal bonding geotextile 5, and connecting the foundation grid 1 and the foundation grid 1 through the connecting rod 4.
The length of the foundation bed grid 1 is 3.0 m-3.3 m, and the thickness is 0.2 cm-0.4 cm. A plurality of triangular net structures are arranged inside the foundation bed grid 1, the side length of each triangular net structure is 3 cm-5 cm, and the inside of each side mesh is of a sunken rectangular rib structure. The connecting rod 4 is formed by cutting a finished product of Q235 smooth steel bar with the diameter of 6-8 mm. The foundation bed grating 1 is laid on the thermal bonding geotextile 5 and connected by the connecting rod 4, the thermal bonding geotextile 5 is blown by a large-scale fan, and the thermal bonding geotextile 5 is bonded with the foundation bed grating 1 after being heated. The foundation bed grating 1 enables the concentrated stress borne by the foundation bed 8 to be dispersed to the surface from points, and the integrity of the stress 8 of the foundation bed is improved.
Step S6, paving road shoulder grids 2 on two sides of the foundation bed grid 1 perpendicular to the line direction, connecting the foundation bed grid 1 and the road shoulder grids 2 through connecting rods 4, and filling broken stones in the road shoulder grids 2.
The road shoulder grating 2 is arranged on two sides of the foundation bed grating 1 perpendicular to the line direction and connected by the connecting rods 4, the road shoulder grating 2 is of a rectangular structure formed by integrally punching and stretching a high polymer polypropylene plate, the length of the road shoulder grating is 3.0-3.3 m matched with the foundation bed grating 1, the width of the road shoulder grating is 0.8-1.0 m, and the thickness of the road shoulder grating is 0.2-0.4 cm. A plurality of triangular net structures are arranged inside the road shoulder grating 2, the side length of each triangular net structure is 3 cm-5 cm, a concave rectangular rib structure is arranged inside each side length mesh, broken stones are filled inside the road shoulder grating, and the particle size of the broken stones is 6 mm. The curb grid 2 can improve grid combination overall stability, can improve the stability of railway curb itself, prevents that the curb swift current from stepping on, and the curb grid can be dismantled alone through taking connecting rod 4 out for cable maintenance in cable duct 9.
And step S7, paving side slope grids 3 on two sides of the road shoulder grids 2 perpendicular to the line direction, connecting the road shoulder grids 2 and the side slope grids 3 through connecting rods 4, and spraying and planting grass in holes of the side slope grids 3.
The side slope grids 3 are arranged on two sides of the road shoulder grids 2 perpendicular to the line direction and connected through connecting rods 4, the side slope grids 3 are of a rectangular structure formed by integrally punching and stretching a high polymer polypropylene plate, the length of the side slope grids is 3.0-3.3 m, the width of the side slope grids is 0.6-0.9 m, and the thickness of the side slope grids is 0.2-0.4 cm. A plurality of triangular net structures are arranged inside the slope grating 3, the side length of each triangular net structure is 3-5 cm, and a sunken rectangular rib structure is formed inside each side mesh. And spraying and planting grass in the side slope grating holes for stabilizing the side slope. The side slope grating 3 can improve the integral stability of grating combination, can prevent the railway side slope from shearing and sliding, and the stability of the side slope can be improved by spraying and planting grass in the side slope grating holes, so that the attractiveness is improved.
And step S8, backfilling the railway ballast 7, tamping and compacting, and re-paving the railway track.
And backfilling the ballast after the screen is removed and cleaned, compacting by using a tamping drum of a small-sized tamping machine, and re-paving the railway track.
According to the technical scheme, the grid structure for controlling the ballast settlement of the existing operation railway and the construction method are provided, the foundation bed grid is laid between the foundation bed of the roadbed and the bottom layer of the ballast, and the concentrated stress at the diseased part of the roadbed is decomposed from point to surface, so that the concentrated stress is eliminated, and the settlement rate of the ballast is reduced. The foundation bed grating, the road shoulder grating and the side slope grating are connected to form a grating structure, the grating structure reinforces the road shoulder and the side slope of the roadbed, prevents potential safety hazards such as road shoulder external arch and side slope slippage caused by ballast sinking, and integrally solves various potential hazards caused by foundation bed sinking. Maintenance of the roadbed foundation bed (below the foundation bed grids), the cable trough (below the curb grids) and the side slope (below the side slope grids) can be completed respectively through disassembling of the grids in the maintenance stage, and maintenance efficiency is improved. The embodiment also provides a construction and pavement method, the pavement time has obvious advantages, and the whole construction process can be completed by utilizing the skylight time. The embodiment thoroughly solves the problem that the railway ballast sinks to generate the diseases of the existing operation railway, improves the bearing capacity of the foundation bed, prolongs the service cycle of the railway bed, effectively ensures the quality and stability of the railway ballast particles, and eliminates the hidden danger of railway travelling.
The embodiments of the present invention have been described in detail through the embodiments, but the description is only exemplary of the embodiments of the present invention and should not be construed as limiting the scope of the embodiments of the present invention. The scope of protection of the embodiments of the invention is defined by the claims. In the present invention, the technical solutions described in the embodiments of the present invention or those skilled in the art, based on the teachings of the embodiments of the present invention, design similar technical solutions to achieve the above technical effects within the spirit and the protection scope of the embodiments of the present invention, or equivalent changes and modifications made to the application scope, etc., should still fall within the protection scope covered by the patent of the embodiments of the present invention.
Claims (9)
1. A grid structure for remedying the sinking of ballast of an existing operation railway is characterized by comprising a foundation bed grid (1), a road shoulder grid (2), a side slope grid (3) and a connecting rod (4); the foundation bed grating is laid between the bottom layer of the ballast (7) and the surface layer of the roadbed foundation bed (8); the foundation bed grid (1) is connected with the foundation bed grid (1) through a connecting rod (4), the thermal bonding geotextile (5) is laid under the foundation bed grid, and the thermal bonding geotextile (5) is connected with the foundation bed grid (1); the road shoulder grids (2) are arranged on two sides of the foundation bed grid (1) perpendicular to the line direction, and the road shoulder grids (2) are connected with the foundation bed grid (1) through connecting rods (4); the side slope grids (3) are arranged on two sides of the road shoulder grids (2) perpendicular to the line direction, and the side slope grids (3) are connected with the road shoulder grids (2) through connecting rods (4).
2. The grid structure for remedying the sinking of the ballast of the existing operation railway according to claim 1, wherein the foundation bed grid (1) is a square structure formed by integrally punching and stretching a high polymer polypropylene plate, the side length of the square is 3.0-3.3 m, and the thickness of the square is 0.2-0.4 cm.
3. The grid structure for remedying the ballast sinking of the existing operating railway according to claim 2, wherein a plurality of triangular mesh structures are arranged inside the foundation bed grid (1), the side length of each triangular mesh structure is 3 cm-5 cm, the insides of the side length meshes are of concave rectangular rib structures, the triangular meshes and the mesh internal rectangular rib structures enable the triangular mesh structures and the mesh internal rectangular rib structures to inlay and restrain particles of the ballast (7), and the concentrated stress of the sinking position of the ballast (7) is decomposed from point to surface.
4. The grid structure for remedying the ballast sinking of the existing operation railway according to claim 1, wherein the curb grid (2) is a rectangular structure formed by integrally punching and stretching a high polymer polypropylene plate, the length of the curb grid (2) is matched with that of the foundation grid (1) and is 3.0-3.3 m, the width is 0.8-1.0 m, and the thickness is 0.2-0.4 cm; a plurality of triangular mesh structures are arranged inside the road shoulder grating (2), the side length of each triangular mesh structure is 3-5 cm, and the insides of the side length meshes are of concave rectangular rib structures; the roadbed grating (2) is filled with gravels.
5. The grid structure for remedying the sinking of the ballast of the existing operation railway according to claim 4, wherein a cable trough (9) is arranged below the shoulder grid (2).
6. The grid structure for remedying the sinking of the ballast of the existing operation railway according to claim 1, wherein the side slope grid (3) is a rectangular structure formed by integrally punching and stretching a high polymer polypropylene plate, the length of the side slope grid (3) is matched with that of a road shoulder grid and is 3.0-3.3 m, the width of the side slope grid is 0.6-0.9 m, and the thickness of the side slope grid is 0.2-0.4 cm; a plurality of triangular mesh structures are arranged inside the slope grating (3), the side length of each triangular mesh structure is 3-5 cm, and a sunken rectangular rib structure is arranged inside each side length mesh.
7. The grid structure for remedying the sinking of the railway ballast of the existing operation railway according to claim 1, wherein the connecting rod (4) is made by cutting a finished steel bar with the diameter of 6-8 mm, and the length of the steel bar is 3.0-3.3 m.
8. The grid structure for remedying the ballast sinking of the existing operating railway according to claim 1, wherein the thermally bonded geotextile (5) is connected with the foundation grid (1) by heating the thermally bonded geotextile (5) by a high-power hot air blower.
9. A construction method for renovating a grid structure for sinking of railway ballast of an existing operation railway is characterized by comprising the following steps:
s1, dismantling the railway track and removing the ballast (7);
s2, screening and leveling a roadbed (8) at the sinking position of the ballast (7);
step S3, paving a sand cushion layer (6) above the roadbed bed (8);
step S4, laying thermal bonding geotextile (5) above the sand cushion layer (6);
step S5, paving a foundation bed grid (1) on the thermal bonding geotextile (5), wherein the foundation bed grid (1) is connected with the foundation bed grid (1) through a connecting rod (4);
step S6, paving road shoulder grids (2) on two sides of the foundation bed grid (1) perpendicular to the line direction, connecting the foundation bed grid (1) and the road shoulder grids (2) through connecting rods (4), and filling broken stones in the road shoulder grids (2);
step S7, paving side slope grids (3) on two sides of the road shoulder grids (2) perpendicular to the line direction, connecting the road shoulder grids (2) with the side slope grids (3) through connecting rods (4), and spraying grass in holes of the side slope grids (3);
and step S8, backfilling the railway ballast (7), tamping and compacting, and re-paving the railway track.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210097392.2A CN114411454A (en) | 2022-01-27 | 2022-01-27 | Grid structure for remedying sinking of ballast of existing operation railway and construction method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114717885A (en) * | 2022-06-07 | 2022-07-08 | 浙江大学 | Construction method for controlling railway ballast bed settlement based on geogrids |
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