CN215800693U - Disconnect-type road bed ballastless track changeover portion pile slab structure - Google Patents
Disconnect-type road bed ballastless track changeover portion pile slab structure Download PDFInfo
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- CN215800693U CN215800693U CN202121989501.9U CN202121989501U CN215800693U CN 215800693 U CN215800693 U CN 215800693U CN 202121989501 U CN202121989501 U CN 202121989501U CN 215800693 U CN215800693 U CN 215800693U
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Abstract
The utility model relates to the technical field of railway engineering, in particular to a separated type roadbed ballastless track transition section pile plate structure; the structure has the advantages of high rigidity, strong integrity, small deformation, simple construction process and the like, can effectively reduce the construction cost, meets the environmental protection requirement, and has wide popularization and application prospect.
Description
Technical Field
The utility model relates to the technical field of railway engineering, in particular to a separated type roadbed ballastless track transition section pile plate structure.
Background
The railway is taken as an important national traffic facility, is a main artery of national economic development, is an important infrastructure of the national economic development, and the ballastless track is produced along with the rapid development of the construction of the high-speed railway. The separated subgrade transition section is used as an engineering connection form under the influence of tunnel separation and repair, engineering geology and the like, and the safety and stability of the separated subgrade transition section are related to the safety of railway transportation.
In the transition of the separated subgrade and the ballastless track, the uneven settlement seriously affects the running speed of the train and the overall stability of the subgrade, in order to meet the requirements of the running safety and the comfort of the train and ensure the high smoothness of the line, the ballastless track railway strictly requires the total settlement, the post-construction settlement and the differential settlement of the subgrade in the transition section, pursues the zero settlement, adopts the traditional composite foundation treatment, although the settlement can be controlled, the larger the treatment width is, the more difficult the settlement of the roadbed is to be controlled, the higher the treatment cost is and the influence on the surrounding environment and surrounding structures is large due to the limited treatment depth, the increase of embankment filling height and separation distance, and when there is high compressibility soil such as thick soft soil, silty clay in the base, it is comparatively difficult to adopt compound foundation to handle subside, if adopt the bridge to pass through, the bridge is the gradual change abnormal shape structure, designs comparatively difficultly and the cost is higher.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a separated type roadbed ballastless track transition section pile plate structure, and aims to solve the technical problems that the separated type roadbed ballastless track transition section is difficult in roadbed settlement treatment and high in manufacturing cost in the prior art.
In order to achieve the purpose, the separated roadbed ballastless track transition section pile plate structure adopted by the utility model comprises foundation piles, transverse connecting beams, longitudinal connecting beams, joists, bearing plates and tracks, wherein the number of the foundation piles is multiple, the foundation piles are distributed in an array manner, the transverse connecting beams are rigidly connected with the foundation piles which are transversely arranged in rows at intervals, the longitudinal connecting beams are rigidly connected with the foundation piles which are longitudinally arranged in rows at intervals, the foundation piles are positioned at the connecting positions of the transverse connecting beams and the longitudinal connecting beams, the joists are rigidly connected with the foundation piles which are transversely arranged in rows at intervals and positioned at the pile tops of the foundation piles which are transversely arranged in rows at intervals, the bearing plates are rigidly connected with the joists and positioned above the joists, and the tracks are rigidly connected with the bearing plates, and is located above the bearing plate.
The pile diameter of the foundation piles is 1.5m, and the longitudinal distance between every two adjacent foundation piles which are arranged in a line at intervals in the longitudinal direction is 9.1 m.
And the length of the two end edges of the transverse connecting beam and the longitudinal connecting beam exceeding the foundation pile is 2-3 m respectively.
The pile plate structure of the transition section of the separated roadbed ballastless track further comprises four stop blocks, and the four stop blocks are arranged above the joist.
Wherein, a plurality of expansion joints are arranged on the bearing plate.
The separated roadbed ballastless track transition section pile plate structure further comprises a gravel-clip two-layer geogrid and embankment filling soil, the transverse connecting beam and the upper portion of the longitudinal connecting beam are provided with the gravel-clip two-layer geogrid, and the upper portion of the gravel-clip two-layer geogrid is provided with the embankment filling soil.
The separated roadbed ballastless track transition section pile plate structure further comprises a plurality of layers of high-strength geogrids, wherein each layer of the high-strength geogrids is vertically arranged, each layer of the high-strength geogrids is arranged in embankment filling soil, and each layer of the high-strength geogrids is adjacent to each other, and the distance between the high-strength geogrids is 3 m.
The utility model has the beneficial effects that: the foundation pile, the transverse connecting beam, the longitudinal connecting beam, the joist and the bearing platform plate are cast in place by adopting reinforced concrete, a soil layer with a better bearing layer is embedded in the pile bottom, the transverse connecting beam and the longitudinal connecting beam are arranged at the ground, the joist and the foundation pile are connected to form a whole, the bearing platform plate is of a separated type and takes three spans as a standard connection.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a schematic cross-sectional view of a pile plate structure of a transition section of a separated subgrade ballastless track of the utility model.
Fig. 2 is a schematic longitudinal section view of a pile plate structure of a transition section of a separated subgrade ballastless track of the utility model.
Fig. 3 is a cross-sectional view of the a-a line structure of fig. 1 of the present invention.
Fig. 4 is a schematic structural view of the rock-sandwiched geogrid of the present invention.
1-foundation pile, 2-transverse connecting beam, 3-longitudinal connecting beam, 4-joist, 5-block, 6-bearing platform plate, 7-track, 8-gravel-sandwiched two-layer geogrid, 9-embankment filling, 10-high-strength geogrid, 11-expansion joint, 801-geogrid and 802-gravel.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the utility model and are not to be construed as limiting the utility model.
In the description of the present invention, it is to be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships illustrated in the drawings, and are used merely for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, are not to be construed as limiting the present invention. Further, in the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.
Referring to fig. 1 to 4, the utility model provides a separated roadbed ballastless track transition section pile slab structure, which comprises foundation piles 1, transverse coupling beams 2, longitudinal coupling beams 3, joists 4, a bearing platform plate 6 and a track 7, wherein the number of the foundation piles 1 is multiple, the foundation piles 1 are distributed in an array, the transverse coupling beams 2 are rigidly connected with the foundation piles 1 which are arranged in rows and in rows transversely and at intervals, the longitudinal coupling beams 3 are rigidly connected with the foundation piles 1 which are arranged in columns and in rows longitudinally, the foundation piles 1 are positioned at the connection position of the transverse coupling beams 2 and the longitudinal coupling beams 3, the joists 4 are rigidly connected with the foundation piles 1 which are arranged in rows and in rows transversely and at intervals, the bearing platform plate 6 is rigidly connected with the joists 4 and positioned above the joists 4, the track 7 is rigidly connected with the bearing plate 6 and is positioned above the bearing plate 6.
In this embodiment, the foundation pile 1, the transverse connecting beam 2, the longitudinal connecting beam 3, the joist 4 and the bearing platform plate 6 are cast in place by reinforced concrete, a soil layer with a better bearing layer is embedded at the bottom of the pile, the transverse connecting beam 2 and the longitudinal connecting beam 3 are arranged on the ground, the joist 4 and the foundation pile 1 are connected to form a whole, the bearing platform plate 6 is of a separated type and is connected by taking three spans as a standard, compared with the prior art, the problems of strict settlement control and stability of the transition section of the separated roadbed ballastless track 7 are solved, the structure has the advantages of high rigidity, strong integrity, small deformation, simple construction process and the like, and the separated bearing platform plate 6 is adopted, so that the length of the foundation pile 1 and the number of the bearing platform plates 6 can be reduced, the construction cost can be effectively reduced, the environmental protection requirement is met, and the popularization and application prospect is wide.
Further, the pile diameter of the foundation piles 1 is 1.5m, and the longitudinal distance between every two adjacent foundation piles 1 arranged at intervals in a line in the longitudinal direction is 9.1 m.
In this embodiment, the foundation pile 1 is cast in situ by using reinforced concrete, a soil layer with a good bearing layer is embedded in the pile bottom of the foundation pile 1, the pile diameter of the foundation pile 1 is 1.5m, the transverse distance of the foundation pile 1 is half of the distance between the left line and the right line of the separated roadbed, the longitudinal distance of the foundation pile 1 is 9.1m, the foundation piles 1 on two sides are respectively positioned below the central line of the left line and the right line, and the foundation pile 1 in the middle is positioned below the center of the joist 4.
Furthermore, the length of the two end edges of the transverse connecting beam 2 and the longitudinal connecting beam 3 respectively exceeding the foundation pile 1 is 2-3 m.
In the embodiment, the transverse connecting beam 2 and the longitudinal connecting beam 3 are cast in place by reinforced concrete, the cross-sectional dimensions of the transverse connecting beam 2 and the longitudinal connecting beam 3 are 2.5m × 1.0m, the transverse connecting beam 2 and the longitudinal connecting beam 3 are both connected with the foundation pile 1, the rigidity is improved by arranging bent reinforcing steel bars at the joints, the length of the two end edges of the transverse connecting beam 2 and the longitudinal connecting beam 3 respectively exceeding the foundation pile 1 is 2-3 m, the integrity and the stability of all the foundation piles 1 are improved under the combined action of the transverse connecting beam 2 and the longitudinal connecting beam 3, under the action of upper load, a structural system consisting of the transverse connecting beam 2, the longitudinal connecting beam 3 and the foundation pile 1 can increase the stress area, the stress of the foundation pile 1 is reduced, the embankment settlement can be effectively controlled, and meanwhile, the transverse connecting beam 2 and the longitudinal connecting beam 3 improve the transverse and longitudinal stability and the rigidity of a pile plate structure, even if the local soil mass below the transverse connecting beam 2 and the longitudinal connecting beam 3 is subjected to uneven settlement, the foundation piles 1 cannot be subjected to lateral deformation to cause overlarge settlement of a roadbed surface, and the overall stability of the embankment is ensured.
Furthermore, disconnect-type road bed ballastless track changeover portion pile slab structure still includes dog 5, the top of joist 4 is provided with four dog 5.
In the embodiment, the joist 4 is cast in place by reinforced concrete, the joist 4 and the foundation pile 1 form a whole, and four stoppers 5 are arranged above the joist 4.
Furthermore, a plurality of expansion joints 11 are arranged on the bearing platform plate 6.
In this embodiment, the bearing platform plate 6 is a separate type, and three spans are used as a standard connection, the expansion joint 11 is disposed between each standard connection plate, and the expansion joint 11 is filled with asphalt.
Further, disconnect-type road bed ballastless track changeover portion pile slab structure still includes two layers of geogrid 8 of rubble clamp and embankment banket 9, horizontal even roof beam 2 with the top of vertical even roof beam 3 is provided with two layers of geogrid 8 of rubble clamp, the top of two layers of geogrid 8 of rubble clamp is provided with embankment banket 9.
In the embodiment, the two-layer geogrid 8 with the gravel clamp with the thickness of 0.6m is arranged above the transverse connecting beam 2 and the longitudinal connecting beam 3, so that the problem of overlarge differential settlement of the embankment caused by uneven rigidity and flexibility in filled soil is solved.
Further, disconnect-type road bed ballastless track changeover portion pile slab structure still includes multilayer high-strength geogrid 10, every layer the vertical setting of high-strength geogrid 10, every layer high-strength geogrid 10 set up respectively in embankment banket 9, and every adjacent distance between the high-strength geogrid 10 is 3 m.
In the embodiment, the embankment filling 9 is filled and compacted by adopting qualified fillers in a layered mode, a layer of high-strength geogrid 10 is paved on every 3m of the full section in the vertical direction, and the tensile strength of the high-strength geogrid 10 is not less than 80 kN/m.
Further, the gravel-sandwiched double-layer geogrid 8 comprises a geogrid 801 and gravel 802, the geogrid 801 is arranged above the transverse connecting beam 2 and the longitudinal connecting beam 3, and the gravel 802 is filled in the geogrid 801.
In the embodiment, the two-layer geogrid 8 with the thickness of 0.6m is arranged above the transverse connecting beam 2 and the longitudinal connecting beam 3, wherein the gravels 802 are filled between the upper geogrid 801 and the lower geogrid, the fluidity of the gravels 802 is utilized to improve the filling stress above the connecting beam, and the overlarge differential settlement of the embankment caused by uneven rigidity and flexibility in the filling is improved.
While the utility model has been described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and detail may be made therein without departing from the spirit and scope of the utility model.
Claims (7)
1. A separated type roadbed ballastless track transition section pile plate structure is characterized in that,
the separated type roadbed ballastless track transition section pile plate structure comprises foundation piles, transverse connecting beams, longitudinal connecting beams, joists, a bearing plate and a track, wherein the number of the foundation piles is multiple, the foundation piles are distributed in an array mode, the transverse connecting beams and the transverse rows of the foundation piles are rigidly connected, the longitudinal connecting beams and the longitudinal rows of the foundation piles are rigidly connected, the foundation piles are located at the connecting positions of the transverse connecting beams and the longitudinal connecting beams, the joists and the transverse rows of the foundation piles are rigidly connected and located at the pile tops of the foundation piles, the bearing plate is rigidly connected with the joists and located above the joists, and the track is rigidly connected with the bearing plate and located above the bearing plate.
2. The separated type roadbed ballastless track transition section pile plate structure of claim 1,
the pile diameter of the foundation piles is 1.5m, and the longitudinal distance between every two adjacent foundation piles which are arranged in a line at intervals in the longitudinal direction is 9.1 m.
3. The separated type roadbed ballastless track transition section pile plate structure of claim 1,
the length of the two end edges of the transverse connecting beam and the longitudinal connecting beam exceeding the foundation piles is 2-3 m.
4. The separated type roadbed ballastless track transition section pile plate structure of claim 1,
the separated roadbed ballastless track transition section pile plate structure further comprises four stop blocks, and the four stop blocks are arranged above the joist.
5. The separated type roadbed ballastless track transition section pile plate structure of claim 1,
a plurality of expansion joints are arranged on the bearing plate.
6. The separated type roadbed ballastless track transition section pile plate structure of claim 1,
the separated type roadbed ballastless track transition section pile plate structure further comprises a gravel-clip two-layer geogrid and embankment filling soil, the transverse connecting beam and the vertical connecting beam are arranged above the gravel-clip two-layer geogrid, and the embankment filling soil is arranged above the gravel-clip two-layer geogrid.
7. The separated type roadbed ballastless track transition section pile plate structure of claim 6,
disconnect-type road bed ballastless track changeover portion pile slab structure still includes multilayer high-strength geogrid, every layer the vertical setting of high-strength geogrid, every layer the high-strength geogrid set up respectively in the embankment is filled up, and every adjacent distance between the high-strength geogrid is 3 m.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121989501.9U CN215800693U (en) | 2021-08-23 | 2021-08-23 | Disconnect-type road bed ballastless track changeover portion pile slab structure |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121989501.9U CN215800693U (en) | 2021-08-23 | 2021-08-23 | Disconnect-type road bed ballastless track changeover portion pile slab structure |
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| CN215800693U true CN215800693U (en) | 2022-02-11 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113502695A (en) * | 2021-08-23 | 2021-10-15 | 中铁二院贵阳勘察设计研究院有限责任公司 | Disconnect-type road bed ballastless track changeover portion pile slab structure |
| CN117626721A (en) * | 2024-01-24 | 2024-03-01 | 中国铁道科学研究院集团有限公司铁道建筑研究所 | Ballastless track system for isolating foundation deformation |
-
2021
- 2021-08-23 CN CN202121989501.9U patent/CN215800693U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113502695A (en) * | 2021-08-23 | 2021-10-15 | 中铁二院贵阳勘察设计研究院有限责任公司 | Disconnect-type road bed ballastless track changeover portion pile slab structure |
| CN117626721A (en) * | 2024-01-24 | 2024-03-01 | 中国铁道科学研究院集团有限公司铁道建筑研究所 | Ballastless track system for isolating foundation deformation |
| CN117626721B (en) * | 2024-01-24 | 2024-04-12 | 中国铁道科学研究院集团有限公司铁道建筑研究所 | Construction method of ballastless track system for isolating foundation deformation |
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