CN108914725B - Magnetic levitation traffic low-structure section rail Liang Jiejian limit force transmission structure - Google Patents
Magnetic levitation traffic low-structure section rail Liang Jiejian limit force transmission structure Download PDFInfo
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- CN108914725B CN108914725B CN201810965738.XA CN201810965738A CN108914725B CN 108914725 B CN108914725 B CN 108914725B CN 201810965738 A CN201810965738 A CN 201810965738A CN 108914725 B CN108914725 B CN 108914725B
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- jiejian
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- 238000005339 levitation Methods 0.000 title claims abstract description 24
- 238000004873 anchoring Methods 0.000 claims abstract description 11
- 230000000670 limiting effect Effects 0.000 claims description 15
- 239000012791 sliding layer Substances 0.000 claims description 12
- 239000010426 asphalt Substances 0.000 claims description 7
- 239000011499 joint compound Substances 0.000 claims description 3
- 230000000694 effects Effects 0.000 description 9
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- 229910000831 Steel Inorganic materials 0.000 description 4
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- 230000002829 reductive effect Effects 0.000 description 4
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- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
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- 238000007596 consolidation process Methods 0.000 description 1
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- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
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Classifications
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01B—PERMANENT WAY; PERMANENT-WAY TOOLS; MACHINES FOR MAKING RAILWAYS OF ALL KINDS
- E01B25/00—Tracks for special kinds of railways
- E01B25/30—Tracks for magnetic suspension or levitation vehicles
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01B—PERMANENT WAY; PERMANENT-WAY TOOLS; MACHINES FOR MAKING RAILWAYS OF ALL KINDS
- E01B25/00—Tracks for special kinds of railways
- E01B25/30—Tracks for magnetic suspension or levitation vehicles
- E01B25/305—Rails or supporting constructions
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Control Of Vehicles With Linear Motors And Vehicles That Are Magnetically Levitated (AREA)
- Road Paving Structures (AREA)
Abstract
The invention discloses a limit force transmission structure of a section rail Liang Jiejian of a magnetic levitation transportation low-lying structure, which is arranged between rail beams (4) at two sides of an expansion joint and comprises a plurality of connecting rods (1) and a sleeve cap (2), wherein the connecting rods (1) are horizontally arranged side by side at a certain distance and perpendicular to the expansion joint, the limit force transmission structure comprises an anchoring section (101) fixed at the middle part of a bottom plate of the rail beam (4) at one side of the expansion joint and a free section (102) which is arranged at the middle part of the bottom plate of the rail beam (4) at the other side of the expansion joint and is in clearance fit with the rail beam (4), the anchoring section (101) and the free section (102) are of an integrated structure, and the sleeve cap (2) is sleeved at the end part of the free section (102) and is provided with a gap with the end part of the free section (102). The magnetic levitation traffic low-lying structure section rail Liang Jiejian limit force transmission structure can effectively avoid differential settlement and bulge and prevent stress concentration or dislocation.
Description
Technical Field
The invention belongs to the technical field of limit force transmission of a rail Liang Jiejian, and particularly relates to a limit force transmission structure of a rail Liang Jiejian of a low-lying structure of magnetic levitation traffic.
Background
The magnetic levitation track traffic engineering has very strict requirements on deformation control, in order to ensure that the track beam in the low-lying structure section does not have excessive temperature stress and uneven settlement, the traditional track beam structure is generally provided with an expansion joint every 10-30 m, the foundation under the track beam is a geotechnical structure formed by rock and soil, and the quality is relatively difficult to control under the influence of factors such as topography, geological conditions and the like. The track beams of the low-structure section are designed according to the elastic foundation beams, under the action of dead weight and train dynamic load, the bottom stress distribution of a single-section track beam is of saddle type with large two sides and small middle, and various adverse natural factors act, the track beams are easy to produce uneven sedimentation, and the adjacent track beams are inevitably different sedimentation, so that the track beams are staggered, the smoothness of a magnetic levitation track is affected, and the normal operation of a magnetic levitation vehicle is affected in severe cases.
In the prior art, a limit plate is arranged at the bottom of a track beam section of a middle-low speed magnetic levitation low-arranged structure so as to solve the problems. Patent CN204455725 discloses a low-level line structure for a filling section of a medium-low speed magnetic levitation traffic engineering, which adopts an internode misplacement bedplate, namely, the same structure as a limiting plate. However, as the limiting plate is in lap joint with the track beam, and the size of the limiting plate is larger, the rigidity mutation occurs at the limiting plate of the elastic foundation, the phenomenon of larger stress concentration occurs at the lap joint of the beam end and the limiting plate, and the lap joint is repeatedly worn under the action of dynamic load, so that the durability of the structure is adversely affected; the frequency of the track Liang Zizhen is inconsistent with the self-vibration frequency of the limiting plate, so that the influence of the dynamic load on the limiting plate is large in the running process of the maglev train, the stress is uneven, repeated bending moment acts on the limiting plate, and fatigue damage and unfavorable deformation are easy to occur. The limit plate changes the boundary condition of the elastic foundation beam of the track beam, and has adverse effect on the vibration resistance of the track beam. In addition, the limiting plate can only control the differential settlement deformation of the roadbed, and the limiting plate can fail in the face of differential rising deformation of the roadbed.
Disclosure of Invention
Aiming at the defects or improvement demands of the prior art, the invention provides a limit force transmission structure of a section rail Liang Jiejian of a maglev traffic low-lying structure, wherein a plurality of connecting rods are arranged between two adjacent sections of rail beams, one end of each connecting rod is an anchoring section and is fixed in the rail beam at one side of an expansion joint, the other end of each connecting rod is a free section, a sleeve cap at the tail end of the free section is sleeved in the rail beam at the other side of the corresponding expansion joint, a gap is arranged between the tail end of the free section and the sleeve cap, so that the free section has the function of freely stretching along the direction of a line, but plays a limiting and restraining role in other directions of the connecting rods, plays a role of transmitting force while limiting, ensures that the foundation stress under the rail beams is relatively uniform, avoids the phenomenon of sudden change of rigidity and stress concentration of the foundation, ensures that differential settlement and differential uplift do not occur between the rail beams, avoids the occurrence of dislocation of the rail beams, and meanwhile, and the force transmitting effect greatly improves the vibration resistance of the rail beams.
The invention provides a limit force transmission structure of a section rail Liang Jiejian of a magnetic levitation traffic low-lying structure, which is arranged between rail beams at two sides of an expansion joint and comprises a connecting rod and a sleeve cap;
the connecting rod is a plurality of, and the interval certain distance level sets up side by side and with the expansion joint is perpendicular, and it is including being fixed in the anchor section at the bottom plate middle part of the track roof beam of expansion joint one side and locating the bottom plate middle part of the track roof beam of expansion joint opposite side with track roof beam clearance fit's free section, anchor section and free section structure as an organic whole, the cover cap cover is established the tip of free section, and with be equipped with the gap between the tip of free section, be used for making the connecting rod has along the free flexible function of circuit direction and the spacing of other directions, in order to release track roof beam shrink deformation and the stress that temperature rise temperature fall produced, through spacing and the transfer effect of power, avoid differential settlement and uplift to prevent stress concentration or the dislocation, improve the vibration resistance of track roof beam simultaneously.
Further, a sliding layer is arranged on the outer side of the free section, and the sliding layer is filled in a gap between the free section and the track beam.
Further, a filling yarn head is arranged between the end part of the free section and the sleeve cap.
Further, the length of the cap is not less than 100mm.
Further, the diameter of the cap is 1-3 mm larger than the diameter of the free section.
Further, the length of the connecting rod is greater than or equal to 0.8m.
Further, the diameter of the connecting rod is larger than or equal to 20mm.
Further, the distance between the adjacent connecting rods is 20 cm-50 cm.
Further, an asphalt film is arranged between the cap and the sliding layer.
Further, the expansion joint is filled with joint compound.
In general, the above technical solutions conceived by the present invention, compared with the prior art, enable the following beneficial effects to be obtained:
(1) According to the invention, the track Liang Jiejian of the low-lying structure of the magnetic levitation traffic is provided with the limit force transmission structure, a plurality of connecting rods are arranged between two adjacent sections of track beams, one ends of the connecting rods are anchor sections fixed in the track beams at one side of the expansion joint, the other ends of the connecting rods are free sections, the corresponding track beams at the other side of the expansion joint are sleeved with caps at the tail ends of the free sections, gaps are arranged between the tail ends of the free sections and the caps, so that the track beams have the function of freely stretching along the line direction, but play the limit constraint of the other directions of the connecting rods, play the role of transmitting force while limiting, enable the foundation stress under the track beams to be uniform, avoid the phenomena of rigidity mutation and stress concentration of the foundation, ensure that differential settlement and differential uplift are not generated between the track beams, avoid the occurrence of dislocation of the track beams, and improve the vibration resistance of the track beams.
(2) According to the magnetic levitation traffic low-position structure section rail Liang Jiejian limit force transmission structure, the sliding layer is arranged on the outer side of the free section, the sliding layer is arranged between the free section and the rail beam, and the filling yarn heads are arranged in gaps between the tail ends of the free section and the sleeve caps, so that the free section is limited to freely stretch and retract along the line direction, and meanwhile, the free section is protected, and excessive abrasion caused by direct contact between the tail ends of the free section and the rail beam when the free section freely stretches and contracts along the line direction is prevented.
(3) The invention relates to a limit force transmission structure of a section rail Liang Jiejian of a magnetic levitation transportation low-lying structure, wherein the length of a connecting rod is not suitable to be smaller than 0.8m, the diameter of a connecting rod 1 is larger than or equal to 25mm, the connecting rod is used for guaranteeing connection and force transmission between two adjacent sections of rail beams, the distance is small when a small-diameter dowel bar is adopted, and the distance is large when a large-diameter dowel bar is adopted, so that the phenomenon of dislocation caused by differential settlement and differential bulge can be better prevented.
Drawings
FIG. 1 is a schematic vertical section view of a limit force transmission structure of a section rail Liang Jiejian of a low-level structure of magnetic levitation transportation according to an embodiment of the present invention;
fig. 2 is a schematic cross-sectional view of a limit force transmission structure of a section rail Liang Jiejian of a low-level structure of magnetic levitation transportation according to an embodiment of the present invention.
In all the figures, like numerals designate like structures or elements, wherein: 1-connecting rod, 2-cap, 3-joint filling material, 4-track beam, 5-sliding layer and 6-filling yarn head; 101-anchor segment, 102-free segment.
Detailed Description
The present invention will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present invention more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention. In addition, the technical features of the embodiments of the present invention described below may be combined with each other as long as they do not collide with each other.
Fig. 1 is a schematic vertical section view of a limit force transmission structure of a section rail Liang Jiejian of a low-level structure of magnetic levitation transportation according to an embodiment of the present invention. Fig. 2 is a schematic cross-sectional view of a limit force transmission structure of a section rail Liang Jiejian of a low-level structure of magnetic levitation transportation according to an embodiment of the present invention. As shown in fig. 1 and 2, the track beam is in the form of a box beam with a convex cross section, and the track beam can also be in the form of a solid beam, a frame column beam, a portal frame beam, and the like. As shown in fig. 1 and 2, the spacing force transmission structure comprises a connecting rod 1 and a sleeve cap 2, the track beams 4 are arranged along the running direction of the train, the track beams 4 are provided with expansion joints of the track Liang Jiejian at equal intervals along the running direction of the train, and the expansion joints divide the track beams 4 into a plurality of sections so as to adapt to the temperature effect and the deformation of the track beams under load.
Preferably, the expansion joint between the track beam bottom plate joints is preferably 2-3 cm, and the joint mixture 3 is adopted for filling the joint mixture; further, the joint compound 3 is preferably waterproof materials such as asphalt wood boards, asphalt hemp ribs, asphalt mastic, polyurethane and the like.
A plurality of connecting rods 1 are arranged between two adjacent sections of track beams, the connecting rods 1 are arranged at the bottom plate of the track beam 4 and are connected with the two adjacent sections of track beams, the connecting rods 1 are arranged at a certain distance, the connecting rods 1 are horizontally arranged and are vertical to the expansion joint, the connecting rods 1 are used for forming connection between the two adjacent sections of track beams 4, so that force transmission between the track beams 4 at two sides of the expansion joint is facilitated, and a foundation is provided for solving the problem that under the action of dead weight, train dynamic load and various adverse natural factors of a single section of track beam, the stress distribution of the bottom of the track beam is uneven and the dislocation is generated by differential settlement; the distance between two adjacent connecting rods 1 is too large, the effect can be weakened sharply, if too small, the effect increase is not obvious any more, and the method is uneconomical, and in the scheme, the distance between the adjacent connecting rods 1 is 20 cm-50 cm, so that the best effect is obtained.
Preferably, the connecting rod 1 is made of steel, aluminum or other high-strength rigid materials, wherein when the steel is used, the free section of the connecting rod is subjected to rust prevention treatment by adopting measures such as galvanization so as to ensure that the connecting rod has enough durability.
Further, the cross section of the light source is round with a light surface; further, the length of the connecting rod 1 is not preferably less than 0.8m for ensuring the connection and force transmission between two adjacent track beams 4; the diameter of the connecting rod 1 is larger than or equal to 20mm, in addition, the distance between the adjacent connecting rods 1 is selected according to the diameter of the connecting rod, when the small-diameter dowel steel is adopted in the range of the distance, the distance is a small value, and when the large-diameter dowel steel is adopted, the distance is a large value.
The connecting rod 1 comprises an anchoring section 101 and a free section 102, wherein the anchoring section 101 is arranged in the middle of the bottom plate of the track beam 4 at one side of the expansion joint, and the anchoring section 101 is fixedly connected with the track beam 4; the free section 102 is arranged in the middle of the bottom plate of the track beam 4 at the other side of the expansion joint, the middle of the bottom plate of the track beam 4 at the other side of the expansion joint is provided with the sleeve cap 2, the sleeve cap 2 is fixed in the track beam 4, the sleeve cap 2 is sleeved at the end part of the free section 102, and a gap is arranged between the end part of the free section 102 and the sleeve cap 2, so that the free section has the function of freely stretching along the direction of a line, and the stress generated by the shrinkage deformation of the track beam and the temperature rise and temperature drop can be released.
The free section 102 is arranged in the track beam 4, so that the limitation constraint of the free end 102 except the reverse direction of a line is ensured, the fixed connection of the anchoring section 101 is realized, namely, the connecting rod 1 can only stretch out and draw back along the direction of the line, the other directions are consolidation constraint, the differential settlement and differential uplift of the track beams on two sides are effectively reduced through the limiting and force transmission effects, the dislocation at the expansion joint between the track beam sections is avoided, meanwhile, the bending angle of the track beam end under the action of dynamic load of a train can be effectively reduced, the beam end cracking and the transverse cracking near the beam end are reduced or avoided, and meanwhile, the vibration resistance of the track beam can be effectively enhanced through the force transmission effects.
Namely, the anchoring section 101 of the connecting rod 1 is fixedly connected with the track beam 4, and the free section 102 of the connecting rod 1 is joggled with the track beam 4, so that the track beams 4 at two sides of the expansion joint are connected through the connecting rod 1; the anchoring section 101 and the free section 102 are connected to form an integral structure, so that the stress of the foundation under the beam becomes more uniform, the saddle-shaped stress distribution under the beam becomes approximately rectangular, and the phenomenon of large stress concentration of the foundation is avoided.
Preferably, the outer surface of the free section 102 is coated with an asphalt film, a sliding layer 5 is arranged on the outer side of the asphalt film, the sliding layer 5 is filled between the free section 102 and the track beams 4 and used for reducing friction between the free section 102 and the track beams 4, and meanwhile, forces between two adjacent sections of track beams 4 are balanced, and differential settlement and differential uplift of the track beams on two sides are effectively reduced.
Further, the sliding layer 5 is made of polyethylene or other materials.
Preferably, the length of the cap 2 is not less than 100mm, and the diameter of the cap 2 is 2-3 cm larger than the diameter of the free section 102, so as to ensure that the telescopic same pair of connecting rods 1 in the line direction of the connecting rods 1 has a due protection effect on the end parts of the connecting rods 1.
The gap between the end of the free section 102 and the cap 2 is 2 cm-3 cm to limit the free expansion and contraction amount of the free section 102 along the line direction, preferably, a filling yarn head 6 is arranged in the gap to play a role in protecting the free section 102 and prevent excessive abrasion caused by direct contact between the end of the free section 102 and the cap 2 when the end of the free section 102 expands and contracts freely along the line direction.
Further, the filling yarn head 6 is made of flexible materials; the cap is made of PVC, but is not limited to PVC.
A gap of not less than 2cm is provided between the end of the cap 2 and the end of the free section 102 in the track beam 4 to accommodate the telescoping of the free section 102.
It will be readily appreciated by those skilled in the art that the foregoing description is merely a preferred embodiment of the invention and is not intended to limit the invention, but any modifications, equivalents, improvements or alternatives falling within the spirit and principles of the invention are intended to be included within the scope of the invention.
Claims (6)
1. The utility model provides a spacing biography power structure of low structure section track Liang Jiejian of magnetic levitation traffic, locates between track roof beam (4) of expansion joint both sides, characterized by that includes connecting rod (1) and cover cap (2);
the connecting rods (1) are arranged side by side at a certain distance horizontally and perpendicular to the expansion joint, each connecting rod comprises an anchoring section (101) fixed at the middle part of a bottom plate of a track beam (4) on one side of the expansion joint and a free section (102) which is arranged at the middle part of the bottom plate of the track beam (4) on the other side of the expansion joint and is in clearance fit with the track beam (4), the anchoring section (101) and the free section (102) are of an integrated structure, the cap (2) is sleeved at the end part of the free section (102) and a gap is arranged between the cap and the end part of the free section (102), and the connecting rods (1) are used for enabling the connecting rods to have the functions of freely stretching along the direction of a line so as to release stress generated by shrinkage deformation of the track beam and temperature rise and temperature drop, and have the transmission functions of limiting forces in other directions so as to avoid differential settlement and uplift and stress concentration or error tables;
a sliding layer (5) is arranged on the outer side of the free section (102), and the sliding layer (5) is filled in a gap between the free section (102) and the track beam (4);
the length of the connecting rods (1) is larger than or equal to 0.8m, the diameter of each connecting rod (1) is larger than or equal to 20mm, and the distance between every two adjacent connecting rods (1) is 20 cm-50 cm.
2. The spacing force transmission structure of the section rail Liang Jiejian of the low-level structure of the magnetic levitation traffic according to claim 1, wherein a filling yarn head (6) is arranged between the end of the free section (102) and the cap (2).
3. A magnetic levitation transportation low-structure section rail Liang Jiejian limit force transmission structure according to claim 1 or 2, wherein the length of the cap (2) is not less than 100mm.
4. A magnetic levitation transportation low-structure section rail Liang Jiejian limit force transmission structure according to claim 3, wherein the diameter of the cap (2) is 1-3 mm larger than the diameter of the free section (102).
5. The magnetic levitation traffic low-structure section rail Liang Jiejian limit force transmission structure according to claim 1, wherein an asphalt film is arranged between the sleeve cap (2) and the sliding layer (5).
6. The limit force transmission structure of the section rail Liang Jiejian of the low-level structure of the magnetic levitation transportation according to claim 1, wherein the expansion joint is filled with joint compound (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810965738.XA CN108914725B (en) | 2018-08-23 | 2018-08-23 | Magnetic levitation traffic low-structure section rail Liang Jiejian limit force transmission structure |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810965738.XA CN108914725B (en) | 2018-08-23 | 2018-08-23 | Magnetic levitation traffic low-structure section rail Liang Jiejian limit force transmission structure |
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| Publication Number | Publication Date |
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| CN108914725A CN108914725A (en) | 2018-11-30 |
| CN108914725B true CN108914725B (en) | 2024-04-02 |
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| CN201810965738.XA Active CN108914725B (en) | 2018-08-23 | 2018-08-23 | Magnetic levitation traffic low-structure section rail Liang Jiejian limit force transmission structure |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113373785B (en) * | 2021-06-30 | 2022-10-18 | 中铁第四勘察设计院集团有限公司 | Beam seam dispersion structure of large-span high-speed magnetic levitation bridge |
| CN113931018B (en) * | 2021-10-27 | 2024-02-20 | 中铁第四勘察设计院集团有限公司 | Straddle type monorail track beam transition buffer device |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105821725A (en) * | 2016-04-29 | 2016-08-03 | 中铁第四勘察设计院集团有限公司 | Intra-segment limit structure for bearing-trail beams at double-line section of middle-low speed magnetic levitation traffic engineering low-laying line |
| CN105887586A (en) * | 2016-04-29 | 2016-08-24 | 中铁第四勘察设计院集团有限公司 | Low implantation line double-wire section terminal spine type bearing rail beam limiting structure in medium and low speed magnetic levitation transportation engineering |
| CN105951535A (en) * | 2016-04-29 | 2016-09-21 | 中铁第四勘察设计院集团有限公司 | Inter-bearing rail beam limit structure of single-line section of middle-low speed magnetic levitation traffic engineering low-arranged line |
| DE102016001953A1 (en) * | 2016-02-19 | 2017-08-24 | Karl Gerhards | Fixed carriageways for railway bridges, their storage on and their connection to the bridge structures |
| CN208844373U (en) * | 2018-08-23 | 2019-05-10 | 中铁磁浮交通投资建设有限公司 | A kind of magnetic floating traffic is low to set structure location track girder internode limit force transfer structure |
-
2018
- 2018-08-23 CN CN201810965738.XA patent/CN108914725B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102016001953A1 (en) * | 2016-02-19 | 2017-08-24 | Karl Gerhards | Fixed carriageways for railway bridges, their storage on and their connection to the bridge structures |
| CN105821725A (en) * | 2016-04-29 | 2016-08-03 | 中铁第四勘察设计院集团有限公司 | Intra-segment limit structure for bearing-trail beams at double-line section of middle-low speed magnetic levitation traffic engineering low-laying line |
| CN105887586A (en) * | 2016-04-29 | 2016-08-24 | 中铁第四勘察设计院集团有限公司 | Low implantation line double-wire section terminal spine type bearing rail beam limiting structure in medium and low speed magnetic levitation transportation engineering |
| CN105951535A (en) * | 2016-04-29 | 2016-09-21 | 中铁第四勘察设计院集团有限公司 | Inter-bearing rail beam limit structure of single-line section of middle-low speed magnetic levitation traffic engineering low-arranged line |
| CN208844373U (en) * | 2018-08-23 | 2019-05-10 | 中铁磁浮交通投资建设有限公司 | A kind of magnetic floating traffic is low to set structure location track girder internode limit force transfer structure |
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| CN108914725A (en) | 2018-11-30 |
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