CN214992702U - Light railway track plate structure - Google Patents
Light railway track plate structure Download PDFInfo
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- CN214992702U CN214992702U CN202120575073.9U CN202120575073U CN214992702U CN 214992702 U CN214992702 U CN 214992702U CN 202120575073 U CN202120575073 U CN 202120575073U CN 214992702 U CN214992702 U CN 214992702U
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Abstract
The utility model relates to a light-duty railway track slab structure relates to railway track construction technical field, and light-duty railway track slab structure includes: the supporting longitudinal ribs are arranged at intervals and are arranged along the direction of a railway track, and at least one circulation hole is formed in each supporting longitudinal rib; steel panels transversely arranged on the two supporting longitudinal ribs; the ultra-high performance concrete layer is paved on the steel panel and is connected with the steel panel through a connecting component fixedly arranged on the steel panel, at least one filling hole is formed in the ultra-high performance concrete layer, and meanwhile, the filling hole is communicated with the circulation hole to form a channel. The self-weight of the track slab is small, cracking is relieved, a prestressed steel beam is not needed, and the service life of the track slab is prolonged.
Description
Technical Field
The application relates to the technical field of railway track construction, in particular to a light railway track plate structure.
Background
In order to respond to the development call of the high-speed railway, a ballastless track is adopted in the industry to replace a traditional structure of 'steel rail + sleeper + railway ballast', wherein the ballastless track mainly adopts a structure of 'steel rail + track plate + closed concrete + groove type concrete base'.
However, in such ballastless track, the track slab is a precast concrete slab, and both the stress performance and the durability can not directly meet the requirements, so a prestressed steel beam needs to be provided, and the track slab adopts the combination of the concrete slab and the prestressed steel beam, and has the disadvantages of great weight and easy cracking. And when the track slab is used for a long time, the problem of loosening of the prestressed steel bundles may occur, and the potential safety hazard of construction to a certain extent also exists.
Disclosure of Invention
The embodiment of the application provides a light railway track plate structure to solve the big, easy cracked defect of dead weight that the track board exists among the correlation technique.
In a first aspect, there is provided a lightweight railway track slab structure comprising:
the supporting longitudinal ribs are arranged at intervals and are arranged along the direction of a railway track, and at least one circulation hole is formed in each supporting longitudinal rib;
steel panels transversely arranged on the two supporting longitudinal ribs;
the ultra-high performance concrete layer is paved on the steel panel and is connected with the steel panel through a connecting component fixedly arranged on the steel panel, at least one filling hole is formed in the ultra-high performance concrete layer, and meanwhile, the filling hole is communicated with the circulation hole to form a channel.
In some embodiments, the connection assembly comprises:
the steel plate groups are distributed at intervals and comprise a plurality of steel plates distributed at intervals along the direction of a railway track, the bottoms of the steel plates are fixedly connected to the steel panel, and the tops of the steel plates are provided with a plurality of open grooves distributed at intervals;
the shear nails are vertically arranged on the steel panel;
the steel bar mesh of individual layer, including a plurality of horizontal reinforcing bars and a plurality of longitudinal reinforcement, horizontal reinforcing bar with longitudinal reinforcement vertically and horizontally staggered arranges, the logical length has been placed in the open slot horizontal reinforcing bar.
In some embodiments, the steel plate is located directly above the supporting longitudinal ribs.
In some embodiments, the opening groove includes a circular through hole and an opening above the circular through hole, the opening is communicated with the circular through hole, and a diameter of the opening is smaller than a diameter of the circular through hole.
In some embodiments, the ultra-high performance concrete layer comprises steel fibers, and the length of the steel fibers is no more than 12 mm; meanwhile, the caliber of the opening is larger than the diameter of the transverse steel bar by 2-4 mm, and the aperture of the circular through hole is 25-35 mm.
In some embodiments, the supporting longitudinal rib is further provided with a plurality of shear-resisting holes, and the diameter of each shear-resisting hole is smaller than that of the corresponding flow through hole.
In some embodiments, the number of the flow holes is plural, and the number of the shear holes in one of the supporting longitudinal ribs is higher than the number of the flow holes, and the plural flow holes and the plural shear holes are uniformly distributed in the direction of the railway track on the supporting longitudinal rib.
In some embodiments, the diameter of the shear holes is 20-40 mm, and the distance between the shear holes along the railway track direction is 150-300 mm; the aperture of the circulation hole is 45-90 mm, and the distance along the railway track direction is 500-1500 mm.
In some embodiments, further comprising:
the track supporting platform set comprises a plurality of track supporting platforms which are distributed at intervals along the direction of a railway track, and the track supporting platforms are located right above the supporting longitudinal ribs.
The beneficial effect that technical scheme that this application provided brought includes: the track slab has small self weight, relieves cracking, does not need to use prestressed steel beams, and prolongs the service life of the track slab.
The embodiment of the application provides a light-duty railway track slab structure, it indulges the rib including supporting, the steel decking, ultra high performance concrete layer, the upper and lower side at the steel decking is equipped with ultra high performance concrete layer respectively and supports indulges the rib, the steel decking with support indulge the rib and form a steel construction, and form the track slab structure with ultra high performance concrete combination, improve atress performance and durability, reduce the probability of later stage disease, compare in the track slab that conventional concrete structure made, ultra high performance concrete layer's thickness is thinner, so the dead weight is littleer, tensile strength is high, also can effectively alleviate the problem of fracture.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
Fig. 1 is a schematic view of a lightweight railway track slab structure (ultra-high performance concrete slab partial construction) provided in an embodiment of the present application;
FIG. 2 is a schematic view of a lightweight railway track slab construction provided in accordance with an embodiment of the present application;
in the figure: 1. supporting longitudinal ribs; 11. a flow-through hole; 12. a shear hole; 2. a steel panel; 3. an ultra-high performance concrete layer; 31. a perfusion hole; 41. a steel plate; 42. an open slot; 421. a circular through hole; 422. an opening; 43. shear nails; 44. a reinforcing mesh; 441. transverse reinforcing steel bars; 442. longitudinal reinforcing steel bars; 5. a rail bearing platform.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
The embodiment of the application provides a light-duty railway track plate structure, and its dead weight is little, can alleviate fatigue fracture and need not to use the prestressing steel bundle, effectively improves the life of track board.
As shown in fig. 1, an embodiment of the present application provides a lightweight railway track slab structure, including:
the supporting longitudinal ribs 1 are arranged at intervals, the supporting longitudinal ribs 1 are arranged along the direction of a railway track, and at least one circulation hole 11 is formed in each supporting longitudinal rib 1;
the steel panels 2 are transversely arranged on the two supporting longitudinal ribs 1;
the concrete layer 3 with the ultrahigh performance is laid on the steel panel 2, the concrete layer 3 with the ultrahigh performance is connected with the steel panel 2 through a connecting assembly fixedly arranged on the steel panel 2, at least one filling hole 31 is formed in the concrete layer 3 with the ultrahigh performance, and meanwhile, the filling hole 31 is communicated with the circulation hole 11 to form a channel.
The conventional railway track plate structure is characterized in that the bottom of the concrete layer is provided with a plurality of convex parts, the thickness of the convex parts is small, the thickness of the concrete layer can be regarded as the thickness of the whole railway track plate structure, the tensile property of common concrete is poor, and the phenomenon of concrete cracking is easy to occur, so that the conventional railway track plate structure also needs to embed prestressed steel bundles in advance, and after the conventional track plate is used for a long time, the prestressed steel bundles can also cause the relaxation of prestress to reduce the stress performance, such as the tensile property.
In the embodiment of the application, the light railway track slab structure comprises supporting longitudinal ribs 1, a steel panel 2 and an ultrahigh-performance concrete layer 3, the ultrahigh-performance concrete layer 3 and the supporting longitudinal ribs 1 are respectively arranged on the upper side and the lower side of the steel panel 2, the steel panel 2 and the supporting longitudinal ribs 1 form a steel structure, and the steel structure is combined with the ultrahigh-performance concrete to form the track slab structure, so that the stress performance, namely the tensile performance, can be improved firstly, the problem of cracking can be effectively relieved, a prestressed steel beam does not need to be additionally arranged, and the construction consumable is reduced; secondly, the surface of the ultra-high performance concrete is compact, and some corrosive factors are difficult to enter the structure, so that the durability is good, and the probability of diseases in the later period is reduced; and compared with the track slab made of the conventional concrete structure, the ultra-high performance concrete layer is thinner in thickness and smaller in self weight, the requirement on hoisting facilities in the construction process is reduced, and the labor is saved.
Further, the connection assembly includes:
the steel plate groups are distributed at intervals and comprise a plurality of steel plates 41 distributed at intervals along the direction of a railway track, the bottoms of the steel plates 41 are fixedly connected to the steel panel 2, and the tops of the steel plates are provided with a plurality of open grooves 42 distributed at intervals;
the shear nails 43 are vertically arranged on the steel panel 2;
the single-layer mesh reinforcement 44 includes a plurality of transverse bars 441 and a plurality of longitudinal bars 442, the transverse bars 441 and the longitudinal bars 442 are arranged in a criss-cross manner, and the transverse bars are placed in the open slots 42 throughout.
In this embodiment, two steel plate groups and a plurality of shear nails 43 are arranged on a steel panel 2, the thickness of the steel panel 2 is 8-16 mm, a plurality of open slots 42 are formed in a plurality of steel plates 41 distributed at intervals in the direction of a railway track, a transverse steel bar 441 can be placed in each open slot 42, the transverse steel bar 441 and the steel plates 41 form a PBL shear key structure, the steel panel 2 and the ultrahigh-performance concrete layer 3 are effectively and reliably connected, a shear force generated by the overall stress of the track plate structure can be borne, the overall rigidity of the track plate structure is improved, the overall stress performance of the track plate structure is improved, and the shear nails 43 on the steel panel 2 can improve the local rigidity of the track plate structure; meanwhile, the ultrahigh-performance concrete is adopted as the paving part on the steel panel 2, the single-layer reinforcing mesh 44 can be arranged, the thickness of the ultrahigh-performance concrete layer 3 can be thinner, and the stress performance of the track plate structure can meet the requirement, so that the track plate structure has lighter self weight, and the requirement on hoisting facilities in the construction process is reduced. When the track slab structure is constructed, the track slab structure is lifted by adopting the lifting equipment, and if the track slab structure is heavy, the lifting equipment with larger specification needs to be adapted, so that the construction cost is increased.
In this embodiment, each of the plurality of steel plates in the steel plate group adopts the steel plate 41 with the open slot 42, so that the problem of difficulty in drilling when the reinforcing mesh 44 is laid can be solved, and meanwhile, the plurality of steel plates 41 distributed at intervals along the railway track direction can effectively avoid the position deviation of the open slot 42 caused by welding, fixing and deformation of the long steel plates, so that the reinforcing mesh 44 can be conveniently arranged in the full length, and the construction is more convenient.
In this embodiment, the transverse bars 441 and the longitudinal bars 442 are arranged in a criss-cross manner, and only one layer of the reinforcing mesh 44 is disposed in the ultra-high performance concrete layer 3 to meet the design requirement, and the structure is simple and the laying efficiency is high. If the common steel fiber concrete is adopted, the strength is low, the reinforcement content has to be increased to increase the crack resistance and the prestressed steel beam, and then the prestressed steel beam needs to be cut after the concrete in the track slab structure is solidified, so that the cost is increased.
Meanwhile, the transverse steel bars 441 comprise steel bars penetrating through the steel plate 41 and transversely arranged steel bars between the steel bars, the distance between every two adjacent transverse steel bars 441 is 150-250 mm, the diameter of every two adjacent transverse steel bars 441 is 8-12 mm, the distance between every two adjacent longitudinal steel bars 442 is 150-250 mm, and the diameter of every two adjacent longitudinal steel bars 442 is 8-12 mm.
Furthermore, the shear nails 43 are distributed between the two steel plate groups in an array mode, the distance between every two steel plate groups in the railway track direction is 100-500 mm, the shear nails 43 are cylindrical head welding nails and are flexible shear keys, the shear force is weak, the local mechanical property of the track plate structure is mainly improved, and the shear nails 43 are distributed in a vertically and horizontally ordered mode, so that on one hand, rapid construction can be achieved, and on the other hand, local stress can be improved in an ordered mode.
Still further, the shear pins 43 are the same height as the steel plates 41. In the embodiment, the height of the shear nails 43 is 45-60 mm, and the diameter thereof can be selected from 13 mm, 16mm and 19 mm.
And the shear nails 43 are arranged between the two steel plate groups, so that the stress performance of the track plate structure is excellent on the whole and the part, the design requirement can be met without closely designing the internal structure of the ultra-high performance concrete layer, the construction material consumption is reduced, and the economic benefit is improved.
Further, the steel plate 41 is positioned right above the supporting longitudinal ribs 1, so that the overall supporting capacity of the track slab structure is improved.
Further, the opening groove 42 includes a circular through hole 421 and an opening 422 above the circular through hole 421, the opening 422 is communicated with the circular through hole 421, and a diameter of the opening 422 is smaller than a diameter of the circular through hole 421.
In this embodiment, the circular through hole 421 is further provided with an opening 422, so that the transverse steel bars 441 can be conveniently arranged on the plurality of steel plates 41 arranged along the transverse bridge direction in a penetrating manner, and the steel plates 41 and the transverse steel bars 441 can form a PBL shear key through rapid construction, so that the overall force transmission performance is more reliable.
Preferably, the ultra high performance concrete layer 3 comprises steel fibers, and the length of the steel fibers does not exceed 12 mm; meanwhile, the caliber of the opening 422 is larger than the diameter of the transverse steel bar 441 by 2-4 mm, and the diameter of the circular through hole 421 is 25-35 mm.
Further, the thickness of the steel plate 41 is 8-12 mm, the height is 45-60 mm, and the length is 250-450 mm.
In this embodiment, when steel fibre length in the ultra high performance concrete is no longer than 12mm, steel fibre can with horizontal reinforcing bar 441 with open slot 42's on the steel sheet 41 size matching, simultaneously, the aperture of circular through-hole 421 is 25 ~ 35mm, and the bore of opening 422 is greater than the diameter 2 ~ 4mm of horizontal reinforcing bar 441, and the hole interval of circular through-hole 421 is 150 ~ 250mm to make ultra high performance concrete layer 3 satisfy the closely knit nature of track plate structure, confirm that track plate structure possesses good mechanical properties.
Further, the thickness of the ultra-high performance concrete layer 3 is 60-100 mm, and under the thickness, the track plate structure can meet the design requirement. In order to ensure that the quality of the ultra-high performance concrete layer 3 in the track slab structure meets the requirement of the structure stress performance, the ultra-high performance concrete with expansibility of more than 600mm, compressive strength of more than 100MPa, flexural strength of more than 20MPa and steam curing-free property is adopted.
Preferably, the supporting longitudinal rib 1 is further provided with a plurality of shear-resistant holes 12, and the diameter of each shear-resistant hole 12 is smaller than that of the circulation hole 11. In the present embodiment, the shear holes 12 allow the concrete mortar flowing from the pouring holes 31 to pass through, so as to improve the connection reliability between the supporting longitudinal ribs 1 and the concrete mortar outside the supporting longitudinal ribs 1, and the flow holes 11 having a larger diameter can allow the concrete mortar between the two supporting longitudinal ribs 1 to flow out of the two supporting longitudinal ribs 1 normally.
Further, the number of the flow holes 11 is plural, and the number of the shear holes 12 in one of the supporting longitudinal ribs 1 is higher than the number of the flow holes 11, and the plural flow holes 11 and the plural shear holes 12 are uniformly distributed on the supporting longitudinal rib 1 in the direction of the railway track.
Furthermore, the aperture of the shear holes 12 is 20-40 mm, and the distance between the shear holes in the railway track direction is 150-300 mm; the aperture of the circulation holes 11 is 45-90 mm, and the distance between the circulation holes along the direction of the railway track is 500-1500 mm. And the pouring hole 31, the circulating hole 11 and the shear resisting hole 12 can be used for concrete mortar solidification in subsequent processes to form a concrete mortar column so as to strengthen the reliable connection of the light railway track slab.
As shown in fig. 2, further, the method further includes:
the track supporting platform comprises two track supporting platform groups arranged at intervals, the track supporting platform groups are arranged on the ultrahigh-performance concrete layer 3, each track supporting platform group comprises a plurality of track supporting platforms 5 distributed at intervals in the railway track direction, and the track supporting platforms 5 are located right above the longitudinal supporting ribs 1.
In the embodiment, the rail bearing platform 5, the steel plate 41 and the supporting longitudinal ribs 1 are approximately on the same vertical surface, and the thickness of the supporting longitudinal ribs 1 is 8-12 mm, the height is 50-100 mm, and the supporting longitudinal ribs are generally arranged.
For better illustration of the application, the embodiment of the application also provides a construction method of the light railway track, and the construction method comprises the following steps:
prefabricating at least one lightweight railway track slab structure as described above;
hoisting the light railway track plate structure on a base of a railway track;
installing a steel template on the periphery of the light railway track slab structure so that the steel template, the base and the light railway track slab structure form a space for filling concrete mortar together;
and the concrete mortar is cast in the space from the pouring hole 31 and is distributed in the space through the circulation hole 11 to form a concrete mortar layer.
In the embodiment, the method is easy to implement, the requirement of equipment for lifting the track slab structure is lowered, the overall construction efficiency is improved, the adverse effect of bubbles in mortar on the railway track is reduced, and the service life of the railway track is effectively prolonged.
Further, in the process of pouring the ultrahigh-performance concrete, vibration leveling operation is also carried out, the ultrahigh-performance concrete layer 3 is guaranteed to be compact and free of holes, the surface is collected and leveled in time, a health-preserving film is covered, and moisture preservation and maintenance are carried out.
Compared with the conventional track slab structure, the track slab structure manufactured by the construction method does not need to be provided with prestressed steel beams, reduces the construction difficulty, also adopts the combination of the ultra-high performance concrete and the steel structure, can greatly reduce the self weight of the structure, can also improve the stress performance and improve the structural durability.
In the description of the present application, it should be noted that the terms "upper", "lower", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, which are only for convenience in describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and operate, and thus, should not be construed as limiting the present application. Unless expressly stated or limited otherwise, the terms "mounted," "connected," and "connected" are intended to be inclusive and mean, for example, that they may be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.
It is noted that, in the present application, relational terms such as "first" and "second", and the like, are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
The above description is merely exemplary of the present application and is presented to enable those skilled in the art to understand and practice the present application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the application. Thus, the present application is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (9)
1. A lightweight railway track slab structure comprising:
the supporting device comprises two supporting longitudinal ribs (1) arranged at intervals, wherein the supporting longitudinal ribs (1) are arranged along the direction of a railway track, and at least one circulation hole (11) is formed in each supporting longitudinal rib (1);
the steel panels (2) are transversely arranged on the two supporting longitudinal ribs (1);
lay in ultra high performance concrete layer (3) on steel face plate (2), ultra high performance concrete layer (3) through set firmly connect the coupling assembling on steel face plate (2) with steel face plate (2) link to each other, at least one perfusion hole (31) has been seted up on ultra high performance concrete layer (3), simultaneously, perfusion hole (31) with opening (11) intercommunication and form a passageway.
2. The light weight railway track slab structure of claim 1, wherein the connection assembly comprises:
the steel plate sets are distributed at intervals and comprise a plurality of steel plates (41) distributed at intervals along the direction of a railway track, the bottoms of the steel plates (41) are fixedly connected to the steel panel (2), and the tops of the steel plates are provided with a plurality of open grooves (42) distributed at intervals;
a plurality of shear nails (43), wherein the shear nails (43) are vertically arranged on the steel panel (2);
the single-layer steel bar mesh (44) comprises a plurality of transverse steel bars (441) and a plurality of longitudinal steel bars (442), wherein the transverse steel bars (441) and the longitudinal steel bars (442) are arranged in a criss-cross mode, and the transverse steel bars are placed in the open grooves (42) in a full-length mode.
3. A light weight railway track slab structure as claimed in claim 2, characterized in that the steel plate (41) is located directly above the supporting longitudinal ribs (1).
4. The light-weight railway track slab structure as claimed in claim 2, wherein the open groove (42) comprises a circular through hole (421) and an opening (422) above the circular through hole (421), the opening (422) is communicated with the circular through hole (421), and the caliber of the opening (422) is smaller than the diameter of the circular through hole (421).
5. A light weight railway track slab structure as claimed in claim 4, characterized in that the ultra high performance concrete layer (3) comprises steel fibres and the length of the steel fibres does not exceed 12 mm; meanwhile, the caliber of the opening (422) is larger than the diameter of the transverse steel bar (441) by 2-4 mm, and the aperture of the circular through hole (421) is 25-35 mm.
6. A light railway track slab structure as claimed in claim 1, wherein the supporting longitudinal rib (1) is further provided with a plurality of shear-resistant holes (12), and the diameter of the shear-resistant holes (12) is smaller than that of the flow through holes (11).
7. A light-weight railway track plate structure as claimed in claim 6, wherein the number of the flow holes (11) is plural, and the number of the shear holes (12) on one supporting longitudinal rib (1) is higher than the number of the flow holes (11), and the plural flow holes (11) and the plural shear holes (12) are uniformly distributed in the railway track direction on the supporting longitudinal rib (1).
8. The light-weight railway track slab structure as claimed in claim 7, wherein the shear holes (12) have a hole diameter of 20 to 40mm and a pitch in the railway track direction of 150 to 300 mm; the aperture of the circulation holes (11) is 45-90 mm, and the distance between the circulation holes along the direction of the railway track is 500-1500 mm.
9. The light weight railway track slab structure of claim 1, further comprising:
the track supporting platform comprises two track supporting platform groups arranged at intervals, the track supporting platform groups are arranged on the ultrahigh-performance concrete layer (3), the track supporting platform groups comprise a plurality of track supporting platforms (5) distributed at intervals in the railway track direction, and the track supporting platforms (5) are located right above the supporting longitudinal ribs (1).
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| CN202120575073.9U CN214992702U (en) | 2021-03-19 | 2021-03-19 | Light railway track plate structure |
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| CN202120575073.9U CN214992702U (en) | 2021-03-19 | 2021-03-19 | Light railway track plate structure |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115233501A (en) * | 2022-09-15 | 2022-10-25 | 成都工业职业技术学院 | Prefabricated railway track base and railway track construction method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115233501A (en) * | 2022-09-15 | 2022-10-25 | 成都工业职业技术学院 | Prefabricated railway track base and railway track construction method |
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