CN114960302B - High-speed railway assembled ballastless track structure and construction method - Google Patents
High-speed railway assembled ballastless track structure and construction method Download PDFInfo
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- CN114960302B CN114960302B CN202210421450.2A CN202210421450A CN114960302B CN 114960302 B CN114960302 B CN 114960302B CN 202210421450 A CN202210421450 A CN 202210421450A CN 114960302 B CN114960302 B CN 114960302B
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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
- E01B1/002—Ballastless track, e.g. concrete slab trackway, or with asphalt layers
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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
- E01B9/00—Fastening rails on sleepers, or the like
- E01B9/68—Pads or the like, e.g. of wood, rubber, placed under the rail, tie-plate, or chair
- E01B9/681—Pads or the like, e.g. of wood, rubber, placed under the rail, tie-plate, or chair characterised by the material
- E01B9/683—Pads or the like, e.g. of wood, rubber, placed under the rail, tie-plate, or chair characterised by the material layered or composite
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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
- Y02A30/30—Adapting or protecting infrastructure or their operation in transportation, e.g. on roads, waterways or railways
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Mechanical Engineering (AREA)
- Railway Tracks (AREA)
- Vibration Prevention Devices (AREA)
Abstract
A high-speed railway assembled ballastless track structure and a construction method thereof comprise ballastless track unit modules, a vibration reduction leveling layer and limit connecting rods; the ballastless track unit module is of a prefabricated structure, the ballastless track unit module is connected with the vibration reduction leveling layer in an end-to-end mode, and the ballastless track unit module is fixed on the supporting structure through the limiting connection rod. The prefabricated module is miniaturized, standardized in design, industrialized in production, simple in installation and leveling and mechanized, and has the characteristics of high precision, few diseases, good vibration damping performance, long service life, energy conservation, environmental protection, easiness in maintenance and the like.
Description
Technical Field
The invention relates to the technical field of rail transit, in particular to a high-speed railway assembled ballastless track structure and a construction method.
Background
The rail structure is used as a material carrier for train operation, the service safety of the rail structure directly influences the operation safety of the train, the stress of the rail structure is very complex in the service process, and the rail structure is important in railway safety operation.
The ballastless track structure has become a main track structure type of a high-speed railway because of the advantages of high smoothness, high stability, less maintenance and the like. The ballastless track types which are applied in China at present mainly comprise double-block type, CRTS I type plate type, CRTS II type plate type, CRTS III type plate type and other structural forms, and commonly used structures comprise a track plate, a filling layer, a concrete base or a supporting layer. The vertical multi-layer and longitudinal heterogeneous strip-shaped structure system has the characteristics of large difference of building material properties, multiple structure layers, complex service environment and building process and the like. Different diseases such as component damage, interface joint grouting, track slab arch and the like appear under the long-term repeated actions of multi-environment and multi-action coupling, and the diseases show characteristics of mass-emission, burst, relapse and the like along with the lengthening of the operation time, so that the safe service, the driving comfort and the maintenance and repair difficulty of the track structure are affected. High-speed railway practice shows that the defect problem of the ballastless track is closely related to factors such as the form of track structure, the construction process of the reverse construction method, a large number of wet operations on site and the like. Therefore, a need exists to explore the basic mechanism and rule of the ballastless track structure in the whole life cycle, and to invent a novel ballastless track structure with high precision, few diseases, long service life, energy conservation, environmental protection and easy maintenance.
Disclosure of Invention
The invention solves the defects of the prior art and provides the high-speed railway assembled ballastless track structure and the construction method, which are quick in construction, simple and convenient in construction, convenient to maintain, high in quality and long in service life.
In order to achieve the aim, the invention firstly provides a high-speed railway assembled ballastless track structure, which comprises ballastless track unit modules, a vibration reduction leveling layer and limit connecting rods; the ballastless track unit module is of a prefabricated structure, the ballastless track unit module is connected with the vibration reduction leveling layer in an end-to-end mode, and the ballastless track unit module is fixed on the supporting structure through the limiting connection rod.
By adopting the structure, the vibration reduction leveling layer is paved on the track supporting structure to control the smoothness of the top surface of the ballastless track unit module during paving, so that the secondary leveling of the track on the ballastless track unit module is realized; the ballastless track unit module realizes primary leveling of the track during factory prefabrication, realizes secondary fine leveling through a pre-pressing vibration reduction leveling layer on site, has higher construction efficiency, and avoids the problem of interlayer interface diseases caused by reverse construction.
In addition, the assembly of the ballastless track structure is realized through the assembly combination of the prefabricated ballastless track unit modules, on one hand, the applicability is high, the ballastless track unit modules are convenient to transport, the assembly method is simple and efficient, on the other hand, when the track structure is damaged, the ballastless track unit modules are only required to be replaced or damaged during maintenance and replacement, the rapid repair can be realized, the replacement is simple, the maintenance cost is low, the maintenance period is short, the labor intensity of workers is low, and the requirement of maintenance in a skylight period of a high-speed railway is met.
In this embodiment, the vibration-damping leveling layer is a cement blanket. The cement blanket in the embodiment is a three-dimensional spacer fabric reinforced cement-based composite material; the cement blanket is soft in material, can be paved into any shape, does not need stirring and molding by a mold, and is filled with dry powder and hardened by sprinkling water. The vibration reduction leveling layer is used for supporting the ballastless track unit modules and is used for realizing fine leveling of the ballastless track by applying pre-compression to the upper ballastless track unit modules in the process from hydration to hardening.
In this embodiment, the ballastless track unit module includes a track plate and a track-bearing table fixed on the track plate. In the embodiment, the ballastless track unit module is prefabricated and formed by a factory, and is simple in processing and high in manufacturing precision.
In this embodiment, the limit connection rod includes a built-in limit boss;
the built-in limit boss comprises an elastic connecting ring, a limit pressing ring, a damping connecting column and a connecting rod piece, wherein a limit step protruding outwards is arranged on the outer wall of the limit pressing ring along the circumferential direction, the inner diameter of the limit pressing ring is matched with the outer diameter of the connecting rod piece, the connecting rod piece is fixedly connected with an embedded part in the track supporting structure, a through hole is formed in the position, corresponding to the connecting rod piece, of the damping leveling layer, the connecting rod piece extends out of the top surface of the damping leveling layer through the through hole, the limit pressing ring is sleeved on the connecting rod piece, and concrete is poured in a gap between the limit pressing ring and the connecting rod piece to form the damping connecting column;
the centers of the connecting ends of two adjacent track plates are respectively provided with a containing groove with the same structure and arranged oppositely, after the adjacent track plates are spliced, the space formed by surrounding the two containing grooves is matched with the size of the limiting compression ring, the inner wall of each containing groove is provided with a positioning block, the positioning blocks correspond to the limiting steps on the limiting compression ring, and the positioning blocks are matched with the limiting steps through the positioning blocks; after the adjacent track plates are spliced, elastic materials are poured into gaps between the limiting compression rings and the accommodating grooves to form elastic connecting rings.
In the embodiment, the concrete for pouring the damping connecting column adopts self-leveling high-damping concrete.
In this embodiment, the elastic material is polyurethane, epoxy-modified polyurethane or polyurethane-modified epoxy.
In this embodiment, the internal limiting boss is cylindrical, elliptical, polygonal or kidney-shaped.
In this embodiment, the spacing clamping ring is fixed by upper and lower two rings that coaxial laid and forms, the height of spacing clamping ring and the thickness phase-match of track board, the last ring external diameter of spacing clamping ring is greater than lower ring external diameter, makes the outside of spacing clamping ring, last ring and lower ring junction form a spacing step.
In this embodiment, the limit connection rod further includes an external limit fastener, where the external limit fastener includes a limit side baffle column; the external limit fasteners are arranged on two sides of the track plate, the bottoms of the limit side baffle columns are fixed on the supporting structure through the anchor studs, the middle parts of the limit side baffle columns are propped against the side surfaces of the track plate, and the tops of the limit side baffle columns are buckled on the top surfaces of the track plate. In the embodiment, the limit side baffle column is formed by preparing prefabricated steel materials, materials are convenient to obtain, design is standardized, production is industrialized, and the assembly method and efficiency are simple and efficient and easy to replace. The structure shape of the external limiting fastener can be specifically set according to the specific installation environment and load bearing condition of the track, and the external limiting fastener is L-shaped or Z-shaped in the embodiment.
According to the structure, the built-in limiting boss and the external limiting fastener are adopted to limit the ballastless track unit module in the horizontal direction and the vertical direction, specifically, the built-in limiting boss is adopted in each two adjacent unit composite boards, the external limiting fastener is adopted outside, and the built-in limiting boss and the external limiting fastener are combined, so that the adjacent ballastless track unit module is guaranteed to be fixedly and stably connected, the external limiting fastener is only required to be removed when the ballastless track unit module is disassembled and maintained, the damping connecting column is damaged, and the ballastless track unit module can be replaced by taking out the limiting pressing ring.
The invention also discloses a construction method of the high-speed railway assembled ballastless track, which is used for constructing the assembled ballastless track structure and specifically comprises the following steps:
a. firstly, prefabricating ballastless track unit modules in a factory according to track design, embedding embedded parts in a supporting structure of a track, and vertically fixing connecting rod pieces on the embedded parts;
b. then paving a vibration reduction leveling layer, wherein the vibration reduction leveling layer adopts a cement blanket, the cement blanket is paved on a supporting structure along the track design direction, the upper end of a connecting rod piece extends out of a through hole of the vibration reduction leveling layer, and then watering is performed on the surface of the cement blanket to soften the cement blanket;
c. paving cement carpets in an end-to-end connection mode on the ballastless track unit modules, enabling the connecting rod pieces to be placed in a containing groove formed by connecting adjacent ballastless track unit modules, and applying a pre-pressing example to the ballastless track unit modules according to design requirements before the cement carpets harden so as to level the ballastless track unit modules;
d. after the cement blanket is hardened, sleeving the limiting pressing ring on a connecting rod piece of the accommodating cavity, pouring self-leveling high-damping concrete in a gap between the limiting pressing ring and the connecting rod piece to form a damping connecting column, and pouring and filling one of polyurethane, epoxy modified polyurethane and polyurethane modified epoxy materials in the gap between the limiting pressing ring and the inner wall of the accommodating cavity to form an elastic connecting ring;
e. external limiting fasteners are arranged on two sides of the ballastless track unit module,
the bottom of the limit side baffle column is fixed on the supporting structure through the anchor stud, the middle part of the limit side baffle column is propped against the side surface of the track plate, and the top of the limit side baffle column is buckled on the top surface of the track plate.
By adopting the method, the ballastless track is modularized, and the construction site only needs to be assembled; the cement blanket is used as a vibration reduction leveling layer of the assembled ballastless track structure, the cement blanket is directly paved on a supporting structure when in use, then the surface of the supporting structure is watered, cement powder in the cement blanket and water are hydrated to react to form semi-solid, ballastless track unit modules are paved on the cement blanket before the cement blanket is hardened, and a certain pre-pressure is applied, so that the ballastless track unit modules can be conveniently and finely leveled; the built-in limiting boss and the external limiting fastener are adopted to limit the ballastless track unit module in the horizontal direction and the vertical direction, and particularly, the built-in limiting boss is adopted in each of the two adjacent unit composite boards, the external limiting fastener is adopted outside, and the built-in limiting boss and the external limiting fastener are combined, so that the adjacent ballastless track unit module is guaranteed to be fixedly and stably connected, the external limiting fastener is only required to be removed when the ballastless track unit module is disassembled and maintained, the damping connecting column is damaged, and the ballastless track unit module can be replaced by taking out the limiting compression ring.
By adopting the method, the invention has the following advantages;
1. the assembly type ballastless track structure, the vibration reduction leveling layer and the limit connecting rod piece are all designed in a standardized manner, produced in a standardized factory and installed on site mechanically, so that the defect of large-scale concrete wet operation on site is avoided, and the accuracy of the track structure is greatly improved as a whole;
2. the problems of more diseases, difficult quality control and the like of cast-in-place concrete are solved by adopting the processes of factory prefabrication, field assembly, forward construction and the like, the problems of gap, breakage and the like of an interlayer interface caused by reverse construction are avoided, and the diseases of a track structure are greatly reduced as a whole;
3. the cement blanket is used as a vibration reduction leveling layer, has the advantages of high strength, good tensile property, good seepage resistance, good durability, convenient construction, environmental friendliness, economy and the like, and can realize deformation coordination with the ballastless track unit module, so that the vibration reduction effect of the track structure is achieved;
4. the process of standardized production, standardized assembly, forward construction and the like is adopted, so that the damage of the track structure is greatly reduced, the service life of the track is prolonged, and the maintenance cost is reduced;
5. factory prefabrication and field assembly are adopted, so that a large amount of concrete wet operation on the field is avoided, the concrete waste is reduced, and the pollution of the concrete field construction to the environment is reduced;
6. the prefabricated components are constructed in an on-site assembly mode, the whole track structure and parts are lighter, and the easy-to-detach components are easy to detach and replace.
In conclusion, the prefabricated module is miniaturized, standardized in design, industrialized in production, simple and mechanized in installation and leveling, and has the characteristics of high precision, less diseases, good vibration damping performance, long service life, energy conservation, environmental protection, easiness in maintenance and the like.
Drawings
FIG. 1 is a schematic three-dimensional structure of the present invention;
FIG. 2 is an exploded view of FIG. 1;
FIG. 3 is an exploded schematic view of the ballastless track unit module and the vibration reduction leveling layer of FIG. 1;
FIG. 4 is a partially exploded view of the present invention with an internal stop boss and an external stop fastener;
FIG. 5 is a schematic view of a three-dimensional structure constructed on a roadbed in accordance with the present invention;
FIG. 6 is a schematic view of a three-dimensional structure constructed on a bridge according to the present invention;
in the drawing, 1, a steel rail; 2. a fastener system; 3. ballastless track unit modules; 301. a rail bearing table; 302. a track plate; 5. damping leveling layer; 6. door-shaped steel bars; 7. a limit boss is arranged in the inner part; 701. an elastic connection ring; 702. limiting compression rings; 703. damping connecting columns; 704. a connecting rod piece; 8. an external limiting fastener; 801. limit side baffle posts; 802. an anchor peg; 9. roadbed; 10. a box girder; 11. a support; 12. and (3) pier.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
In addition, the technical solutions of the embodiments of the present invention may be combined with each other, but it is necessary to be based on the fact that those skilled in the art can implement the technical solutions, and when the technical solutions are contradictory or cannot be implemented, the combination of the technical solutions should be considered as not existing, and not falling within the scope of protection claimed by the present invention.
As shown in fig. 1, the present example provides a high-speed railway assembled ballastless track structure, which comprises a ballastless track unit module 3, a vibration reduction leveling layer 5 and a limit connection rod piece;
the limiting connection rod piece is fixed on a track supporting structure along the extending direction of the track design, the vibration reduction leveling layer 5 is paved on the track supporting structure, the ballastless track unit module 3 is of a prefabricated structure, two rows of door-type steel bars 6 are arranged below the bottom of the ballastless track unit module 3, the ballastless track unit module 3 is paved on the vibration reduction leveling layer 5 in a head-to-tail connection mode, the door-type steel bars connect the ballastless track unit module 3 and the vibration reduction leveling layer 5 to form an integral structure, the ballastless track unit module 3 is fixed on the supporting structure through the limiting connection rod piece, and the vibration reduction leveling layer 5 is further fixed;
the support structure in this embodiment may be a roadbed 9 (when the track is laid on the ground) or a box girder 10 of a bridge (when the track is laid on the deck).
The vibration reduction leveling layer 5 adopts a cement blanket, and the cement blanket in the embodiment is a three-dimensional spacer fabric reinforced cement-based composite material; the cement blanket is soft in material, after being laid, the cement blanket is hardened into a firm building member through hydration reaction by sprinkling water within a few hours, and the cement blanket has the advantages of high strength, good deformation performance, good seepage-proofing performance, good durability, convenient construction, environmental friendliness, economy and the like, avoids a great deal of wet operation on site, reduces diseases of the prior track base plate, and improves the construction speed and vibration damping performance of the track structure. The vibration reduction leveling layer 5 is used for supporting the ballastless track unit modules 3 and is used for realizing fine leveling of the ballastless track by applying pre-compression to the upper ballastless track unit modules 3 in the process from hydration to hardening.
The ballastless track unit module 3 comprises a track plate 302 and a track bearing platform 301 fixed on the track plate 302, after the ballastless track unit module 3 is paved, the steel rail 1 is supported on the track bearing platform 301, and the steel rail 1 is locked and fixed on the track bearing platform 301 through a fastener system 2. In the embodiment, the ballastless track unit module 3 is prefabricated and formed by a factory, and is simple in processing and high in manufacturing precision. The fastening system 2 comprises two sets of fasteners which are arranged on both sides of the rail 1, and which are not described here, since they belong to the prior art.
The limit connecting rod piece comprises an internal limit boss 7 and an external limit fastener 8;
the built-in limit boss 7 comprises an elastic connecting ring 701, a limit pressing ring 702, a damping connecting column 703 and a connecting rod 704, wherein the limit pressing ring 702 is formed by fixing an upper annular ring and a lower annular ring which are coaxially arranged, the height of the limit pressing ring 702 is matched with the thickness of the track plate 302, the outer diameter of the upper annular ring of the limit pressing ring 702 is larger than that of the lower annular ring, so that a limit step is formed at the joint of the upper annular ring and the lower annular ring outside of the limit pressing ring 702, the inner diameter of the limit pressing ring 702 is matched with the outer diameter of the connecting rod 704, the connecting rod 704 is fixedly connected with an embedded part in a track supporting structure, a through hole is formed in a position, corresponding to the connecting rod 704, of the damping leveling layer 5, the connecting rod 704 extends out of the top surface of the damping leveling layer 5 through the through hole, the limit pressing ring 702 is sleeved on the connecting rod 704, and high-damping concrete is poured in a gap between the limit pressing ring 702 and the connecting rod 704 to form the damping connecting column 703;
the centers of the connecting ends of the two adjacent track plates 302 are respectively provided with a containing groove with the same structure and arranged oppositely, after the adjacent track plates 302 are spliced, the space formed by surrounding the two opposite containing grooves is matched with the size of the limiting compression ring 702, the inner wall of each containing groove is provided with a positioning block, the positioning blocks correspond to the limiting steps on the limiting compression ring 702, and the positioning blocks are matched with the limiting steps, so that when the two adjacent track plates 302 are spliced, the positioning blocks are clamped below the limiting steps and limit the track plates 302 in the vertical direction, and the two adjacent track plates 302 are ensured to be positioned on the same horizontal plane;
after the adjacent track plates 302 are spliced, polyurethane, epoxy modified polyurethane or polyurethane modified epoxy are poured into a gap between the limiting compression ring 702 and the accommodating groove to form an elastic connection ring 701;
in the embodiment, the connecting rod 704 is I-steel made of rigid materials, so that the materials are convenient to obtain, the preparation is easy, and the connection strength is reliable; the limiting press ring 702 is prefabricated and molded by ultra-high performance concrete (UHPC) in a factory, and has the compressive strength of more than 150MPa, good cracking resistance and durability;
during actual construction, the lower end of the connecting rod 704 is fixed with an embedded part in a supporting structure, then a vibration reduction leveling layer 5 is paved, the upper end of the connecting rod 704 extends out of a through hole of the vibration reduction leveling layer 5, then a ballastless track unit module 3 is paved, and the connecting rod 704 is placed in a containing groove of the ballastless track unit module 3; then the limiting compression ring 702 is sleeved in the accommodating cavity, so that the vertical direction of the track slab 302 is positioned, self-leveling high-damping concrete is poured in a gap between the limiting compression ring 702 and the connecting rod 704 to form a damping connecting column 703, the damping connecting column 703 fixes the limiting compression ring 702 and the connecting rod 704, and meanwhile, the upper structure of the built-in limiting boss 7 is subjected to vibration reduction, the self-leveling performance ensures the construction performance and quality of the concrete, and the high damping performance ensures the vibration reduction effect of the concrete; and then pouring and filling a gap between the limiting compression ring 702 and the inner wall of the accommodating cavity by one of polyurethane, epoxy modified polyurethane and polyurethane modified epoxy materials to form an elastic connecting ring 701, so that the ballastless track unit module 3 can carry out adaptive fine adjustment on paving positions according to temperature and load conditions.
Alternatively, the structural shape of the built-in limit boss 7 may be specifically set according to the specific installation environment of the rail, the load bearing condition, the stress condition, and the like. The built-in limit boss 7 can be one of a cylinder type, an elliptic cylinder type, a polygonal cylinder type or a waist-shaped cylinder type. The shape of the accommodating cavity is matched with the shape of the built-in limit boss 7,
the external limiting fastener 8 comprises a limiting side baffle column 801; the external limit fasteners 8 are arranged on two sides of the track plate 302, the bottoms of the limit side baffle columns 801 are fixed on a supporting structure through the anchor studs 802, the middle parts of the limit side baffle columns 801 are propped against the side surfaces of the track plate 302, the tops of the limit side baffle columns 801 are buckled on the top surfaces of the track plate 302, in the embodiment, the limit side baffle columns 801 are made of prefabricated steel materials, the materials are available, the design is standardized, the production is industrialized, and the assembly method and the efficiency are simple and efficient and easy to replace. The structural shape of the external limiting fastener 8 can be specifically set according to the specific installation environment and load bearing condition of the track, and in the embodiment, the external limiting fastener 8 is in an L shape or a Z shape.
The invention also discloses a construction method of the high-speed railway assembled ballastless track, which is used for constructing the assembled ballastless track structure and specifically comprises the following steps:
a. firstly, prefabricating ballastless track unit modules in a factory according to track design, embedding embedded parts in a supporting structure of a track, and vertically fixing connecting rod pieces on the embedded parts;
b. then paving a vibration reduction leveling layer, wherein the vibration reduction leveling layer adopts a cement blanket, the cement blanket is paved on a supporting structure along the track design direction, the upper end of a connecting rod piece extends out of a through hole of the vibration reduction leveling layer, and then watering is performed on the surface of the cement blanket to soften the cement blanket;
c. paving cement carpets in an end-to-end connection mode on the ballastless track unit modules, enabling the connecting rod pieces to be placed in a containing groove formed by connecting adjacent ballastless track unit modules, and applying a pre-pressing example to the ballastless track unit modules according to design requirements before the cement carpets harden so as to level the ballastless track unit modules;
in the actual fine leveling construction, the elevation and settlement of the base layer are controlled by adopting machine vision measurement, in order to reduce errors and calculation workload of elevation and thickness control, an electronic computer is adopted to measure a plurality of measuring points which are sequentially arranged on each section at intervals, the setting elevation of the ballastless track unit module obtained by observation and the measured elevation of each measuring point are made into a data file, the difference value between the elevation of each measuring point and the design elevation is obtained through data analysis, the thickness of each measuring point, the average value, the mean square error and the representative value of the thickness of each section are obtained, and the next adjustment and control are guided.
d. After the cement blanket is hardened, sleeving the limiting pressing ring on a connecting rod piece of the accommodating cavity, pouring self-leveling high-damping concrete in a gap between the limiting pressing ring and the connecting rod piece to form a damping connecting column, and pouring and filling one of polyurethane, epoxy modified polyurethane and polyurethane modified epoxy materials in the gap between the limiting pressing ring and the inner wall of the accommodating cavity to form an elastic connecting ring;
e. external limiting fasteners are arranged on two sides of the ballastless track unit module,
the bottom of the limit side baffle column is fixed on the supporting structure through the anchor stud, the middle part of the limit side baffle column is propped against the side surface of the track plate, and the top of the limit side baffle column is buckled on the top surface of the track plate.
In the step a, the prefabrication process of the ballastless track unit module comprises the following steps: the prefabricated module is adopted, so that the bonding strength of an interlayer interface is greatly improved, the problem that the interlayer interface is easy to leave seams caused by the construction of a reverse construction method in the prior track technology is avoided, the damage of the track structure interface is reduced, and the service life of the track structure is prolonged.
Through the method, when the ballastless track unit module is disassembled and maintained, only the external limiting fasteners are required to be removed, the damping connecting columns are damaged, and the limiting compression rings are taken out to replace the ballastless track unit module.
Example 1:
as shown in fig. 5, the vibration-damping leveling layer 5 is directly paved on the roadbed 9 of the railway, and the ballastless track unit modules are paved on the vibration-damping leveling layer 5.
Example 2:
as shown in fig. 6, the difference from embodiment 1 is that the vibration damping leveling layer 5 is directly laid on the box girder 10 of the abutment 11 on the pier 12.
The foregoing description of the preferred embodiments of the present invention should not be construed as limiting the scope of the invention, but rather utilizing equivalent structural changes made in the present invention description and drawings or directly/indirectly applied to other related technical fields are included in the scope of the present invention.
Claims (6)
1. The high-speed railway assembled ballastless track structure is characterized by comprising ballastless track unit modules (3), a vibration reduction leveling layer (5) and limiting connectors; the ballastless track unit module (3) is of a prefabricated structure, two rows of door-shaped steel bars (6) are arranged below the bottom of the ballastless track unit module (3), the ballastless track unit module (3) is paved on the vibration reduction leveling layer (5) in a head-to-tail connection mode, the door-shaped steel bars (6) connect the ballastless track unit module (3) with the vibration reduction leveling layer (5) to form an integral structure, the ballastless track unit module (3) is fixed on the supporting structure through the limiting connection piece, and the vibration reduction leveling layer (5) adopts a cement blanket;
the ballastless track unit module (3) comprises a track plate (302) and a track bearing table (301) fixed on the track plate (302), and the limit connecting piece comprises a built-in limit boss (7);
the built-in limit boss (7) comprises an elastic connecting ring (701), a limit pressing ring (702), a damping connecting column (703) and a connecting rod piece (704), wherein an outwards protruding limit step is arranged on the outer wall of the limit pressing ring (702) along the circumferential direction, the inner diameter of the limit pressing ring (702) is matched with the outer diameter of the connecting rod piece (704), the connecting rod piece (704) is fixedly connected with an embedded part in a track supporting structure, a through hole is formed in a position, corresponding to the connecting rod piece (704), of the damping leveling layer (5), the connecting rod piece (704) extends out of the top surface of the damping leveling layer (5) through the through hole, the limit pressing ring (702) is sleeved on the connecting rod piece (704), and concrete is poured in a gap between the limit pressing ring (702) and the connecting rod piece (704) to form the damping connecting column (703);
the centers of the connecting ends of two adjacent track plates (302) are respectively provided with accommodating grooves which have the same structure and are oppositely arranged, after the adjacent track plates (302) are spliced, the space formed by encircling the two opposite accommodating grooves is matched with the size of the limiting compression ring (702), the inner wall of each accommodating groove is provided with a positioning block, the positioning blocks correspond to the limiting steps on the limiting compression ring (702), and the positioning blocks are matched with the limiting steps through the positioning blocks, when the two adjacent track plates (302) are spliced, the positioning blocks are clamped below the limiting steps to limit the track plates (302) in the vertical direction; after the adjacent track plates (302) are spliced, an elastic material is poured into a gap between the limiting compression ring (702) and the accommodating groove to form an elastic connecting ring (701);
the limiting connecting piece further comprises an external limiting fastener (8), and the external limiting fastener (8) comprises a limiting side baffle column (801); the external limit fasteners (8) are arranged on two sides of the track plate (302), the bottoms of the limit side baffle columns (801) are fixed on the supporting structure through anchor bolts (802), the middle parts of the limit side baffle columns (801) are propped against the side surfaces of the track plate (302), and the tops of the limit side baffle columns (801) are buckled on the top surfaces of the track plate (302).
2. The high-speed railway assembled ballastless track structure of claim 1, wherein: and the concrete for pouring the damping connecting column (703) adopts self-leveling high-damping concrete.
3. The high-speed railway assembled ballastless track structure of claim 1, wherein: the elastic material is polyurethane, epoxy modified polyurethane or polyurethane modified epoxy.
4. The high-speed railway assembled ballastless track structure of claim 1, wherein: the built-in limit boss (7) is of a cylindrical shape, an elliptic cylindrical shape, a polygonal cylindrical shape or a waist-shaped cylindrical shape.
5. The high-speed railway assembled ballastless track structure of claim 1, wherein: the limiting press ring (702) is formed by fixing an upper ring and a lower ring which are coaxially arranged, the height of the limiting press ring (702) is matched with the thickness of the track plate (302), and the outer diameter of the upper ring of the limiting press ring (702) is larger than that of the lower ring, so that a limiting step is formed at the joint of the upper ring and the lower ring and the outer side of the limiting press ring (702).
6. The construction method of the assembled ballastless track of the high-speed railway is used for constructing the assembled ballastless track structure of claim 1, and is characterized by comprising the following steps:
a. firstly, prefabricating ballastless track unit modules (3) in a factory according to track design, embedding embedded parts in a supporting structure of a track, and vertically fixing connecting rod pieces (704) on the embedded parts;
b. then paving a vibration reduction leveling layer (5), paving the vibration reduction leveling layer (5) on a supporting structure along the track design direction by adopting a cement blanket, enabling the upper end of a connecting rod piece (704) to extend out of a through hole of the vibration reduction leveling layer (5), and then watering on the surface of the cement blanket to soften the cement blanket;
c. paving cement carpets in an end-to-end connection mode on the ballastless track unit modules (3) so that connecting rods (704) are placed in accommodating grooves formed by connecting adjacent ballastless track unit modules (3), and applying pre-pressing examples to the ballastless track unit modules (3) according to design requirements before the cement carpets harden to realize leveling of the ballastless track unit modules (3);
d. after the cement blanket is hardened, sleeving a limiting press ring (702) on a connecting rod piece (704) of the accommodating cavity, pouring self-leveling high-damping concrete in a gap between the limiting press ring (702) and the connecting rod piece (704) to form a damping connecting column (703), and pouring one of polyurethane, epoxy modified polyurethane and polyurethane modified epoxy materials to fill the gap between the limiting press ring (702) and the inner wall of the accommodating cavity to form an elastic connecting ring (701);
e. external limit fasteners (8) are arranged on two sides of the ballastless track unit module (3),
the bottom of the limit side baffle column (801) is fixed on a supporting structure through an anchoring bolt (802), the middle part of the limit side baffle column (801) is propped against the side surface of the track plate (302), and the top of the limit side baffle column (801) is buckled on the top surface of the track plate (302).
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| CN106316291A (en) * | 2016-08-22 | 2017-01-11 | 北京中德新亚建筑技术有限公司 | Ballastless track bed concrete defect repairing material |
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| JP2008303567A (en) * | 2007-06-06 | 2008-12-18 | Kyushu Railway Co | Vibration-isolating ballast track |
| CN104389249B (en) * | 2014-10-29 | 2016-08-24 | 中国铁道科学研究院铁道建筑研究所 | Track plates in a kind of railway ballastless track withholds stopping means |
| AT517573A1 (en) * | 2015-07-21 | 2017-02-15 | Steinhauser Consulting Eng Zt Gmbh | Bahngleisauflagerung |
| FR3073868B1 (en) * | 2017-11-21 | 2019-11-29 | Sateba Systeme Vagneux | PREFABRICATED SLAB FOR RAILWAYS, ASSOCIATED CROSSBAR AND INSTALLATION METHOD |
| CN110761119A (en) * | 2019-09-19 | 2020-02-07 | 中铁第四勘察设计院集团有限公司 | Cold-pressed longitudinal-connection-containing assembly type ballastless track structure of vibration reduction section and assembly method |
| CN113584956B (en) * | 2021-07-07 | 2022-06-07 | 高速铁路建造技术国家工程实验室 | Built-in limiting module pin-connected panel track structure |
| CN113550176B (en) * | 2021-07-07 | 2022-09-23 | 高速铁路建造技术国家工程实验室 | External spacing module pin-connected panel track structure |
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| CN106316291A (en) * | 2016-08-22 | 2017-01-11 | 北京中德新亚建筑技术有限公司 | Ballastless track bed concrete defect repairing material |
| CN113481763A (en) * | 2021-07-07 | 2021-10-08 | 高速铁路建造技术国家工程实验室 | Self-leveling assembled steel-concrete combined track structure |
| CN113969526A (en) * | 2021-11-30 | 2022-01-25 | 中铁二院工程集团有限责任公司 | Temporary construction road pavement structure and construction method thereof |
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Address after: Yuelu District City, Hunan province 410083 Changsha Lushan Road No. 932 Applicant after: CENTRAL SOUTH University Applicant after: National Engineering Research Center of high speed railway construction technology Address before: Yuelu District City, Hunan province 410083 Changsha Lushan Road No. 932 Applicant before: CENTRAL SOUTH University Applicant before: NATIONAL ENGINEERING LABORATORY FOR CONSTRUCTION TECHNOLOGY OF HIGH SPEED RAILWAY |
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