Seamless combination device for exterior line rails of ground upper cover development field section library
By designing a seamless combination device for external rails in the ground upper cover development site section in urban rail transit, the track bed and joint types are optimized, the vibration and noise problems of rail joints are solved, and the vibration reduction effect of about 3dB is achieved, and the upper cover is improved. The quality of the property also reduces operation and maintenance costs.
Patent Information
- Application Number
- CN202420565285.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-03-22
- Publication Date
- 2024-12-06
- Estimated Expiration
- 2034-03-22
AI Technical Summary
In the existing technology, rail joints on the outside of the warehouse cause vibration and noise problems, affecting the development quality of the upper cover property, and traditional vibration-absorbing pads cannot completely eliminate the impact of vibration.
Design a seamless combination device for external tracks of the upper floor development site section library, including first-level bolt beds, new III bridge pillows, interlinear filling bolts, shoulder piles, road bed slopes and basin blocks , by optimizing the track bed design and joint type, eliminating the vibration source of the rail joint to achieve seamless small radius curves.
It effectively reduces the vibration and noise generated by train operation, achieves a vibration reduction effect of about 3dB, reduces the impact on the upper-covered building from the source, improves the development quality of the upper-covered property in the field section, and reduces the operation and maintenance costs.
Smart Images
Figure CN222119807U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of vibration reduction and noise reduction in urban rail transit, and in particular to a seamless assembly device for outer track of a ground cover development field section depot. Background Art
[0002] As the scale of subway construction continues to expand, the development of the above-covered property in the yard section is gradually increasing. There are many small-radius curves in the throat area of the outer line of the yard section. The minimum curve radius is generally 150m. The turnouts and rail joints are densely distributed. The driving speed of the outer line is 15km / h~20km / h. The vibration generated by the train under the cover can be transmitted to the above-covered buildings, thereby affecting the quality of the above-covered development. The vibration impact mainly comes from the impact vibration of the turnout and the rail joint of the jointed line. There is wheel-rail noise and whistling noise in the small-radius curve section. When the train passes through the "harmful space" of the turnout and the rail joint, it will generate impact noise. According to the domestic vibration test of the above-covered property of the yard section outer line, the vibration of the above-covered property exceeds the standard by 3~8dB. Therefore, for the vibration reduction problem of the above-covered property development of the yard section, it is necessary to focus on the impact vibration of the turnout in the throat area and the small-radius curve section.
[0003] At present, most of the external lines of the domestic covered property sections use vibration-damping pads. Laying vibration-damping pads under the roadbed can reduce the transmission of vibration to the lower foundation, and has a good vibration reduction effect (vibration reduction effect 5-8dB). However, vibration still exists at the rail joints of the external line, and the vibration influence of the external line has not been completely eliminated from the source. The vibration and noise generated by the train passing through the line directly affect the development quality of the covered property.
[0004] In summary, there is still vibration on the external lines of the depot due to the rail joints, which in turn affects the development quality of the properties above. Summary of the invention
[0005] The utility model aims to provide a seamless assembly device for the outer line track of a ground cover development field section, so as to at least solve the problem that the outer line of the depot generates vibration due to the rail joint.
[0006] In order to achieve the above purpose, the technical solution adopted by the utility model is:
[0007] A seamless assembly device for outer track of a ground-cover development section, the device comprising rails, joints, new III-type bridge sleepers, a first-class ballast roadbed, inter-line filling ballast, ballast shoulder pile, roadbed slope and ballast retaining blocks;
[0008] The first-level ballast track is laid on the lower foundation of the section, the new type III bridge sleeper is laid on the first-level ballast track, the rails are fixed on the new type III bridge sleepers, and the rails are fixedly connected by the joints;
[0009] The inter-line filling ballast is filled between the first-level ballast roadbeds of the two lines, the ballast shoulder is piled up outside the small radius curve, the roadbed slopes are arranged inside and outside the small radius curve, and the ballast retaining blocks are arranged at the slope feet on both sides of the first-level ballast roadbed and connected to the roadbed slopes.
[0010] Furthermore, the thickness of the primary ballast bed is not less than 250 mm.
[0011] Furthermore, the primary ballast roadbed outside the small radius curve is widened by 200 mm inside the small radius curve.
[0012] Furthermore, the slope of the roadbed side slope outside the small radius curve is 1:1.75.
[0013] Furthermore, the slope of the roadbed side slope inside the small radius curve is 1:1.5.
[0014] Furthermore, the height of the ballast pile is 150 mm.
[0015] Furthermore, the inter-line filling ballast is used to fill the first-level ballast roadbed between two lines with a spacing of no more than 5m.
[0016] Furthermore, the sleeper spacing of the new III type bridge sleeper is 650mm.
[0017] Furthermore, the rails in the turnout area are fixedly connected by frozen joints, and the rails outside the depot are fixedly connected by flash welding joints.
[0018] Furthermore, the rails are seamless rails, and the rails are fixed to the new III-type bridge sleepers by fasteners.
[0019] Compared with the prior art, the beneficial effects of the utility model are as follows:
[0020] The utility model designs a seamless combination device for the outer line track of the ground cover development section, which is suitable for the ground cover development section of urban rail transit. By adjusting the design of the first-level ballast roadbed 4, adopting the new III-type bridge sleeper 3 and the dense sleeper arrangement, optimizing the slope of the ballast shoulder and the roadbed side slope 7 of the outer side of the curve, using the frozen joint connection of the rail joints in the turnout area, using the flash welding joints for the rail joints in the other sections, and filling the ballast between the lines, the small radius curve of the outer line is realized, and the rail joint is eliminated.
[0021] For areas with low temperatures of around 0°C and high temperatures of around 40°C, due to the small temperature difference under the yard cover and the small variation in rail temperature, it is possible to lay seamless lines outside the yard depot for ground cover development, eliminate rail joints in the switch area and small radius curve sections, eliminate vibration sources, reduce vibration and noise generated by train operation, and achieve a vibration reduction effect of about 3dB, thereby reducing the impact of train operation vibration on the covered buildings from the source, thereby improving the quality of property development on the yard cover, reducing the workload of track structure maintenance, and reducing operation and maintenance costs. BRIEF DESCRIPTION OF THE DRAWINGS
[0022] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, drawings of other embodiments can be obtained based on these drawings without paying creative work.
[0023] Figure 1 2 is a schematic diagram of the cross-sectional structure of the present embodiment;
[0024] Figure 2 Schematic diagram of the planar structure of this embodiment;
[0025] The symbols in the figure are:
[0026] 1-rail, 2-joint, 3-new type III bridge sleeper, 4-first-class ballast track bed, 5-ballast filling between lines, 6-ballast shoulder pile, 7-track bed slope, 8-ballast retaining block. DETAILED DESCRIPTION
[0027] In order to facilitate the understanding of the present invention, the present invention will be described more comprehensively with reference to the relevant drawings. The drawings provide preferred embodiments of the present invention. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present invention more thoroughly and comprehensively understood.
[0028] In the description of the present invention, it should be understood that the terms "up", "down", "left", "right", "vertical", "horizontal", "bottom", "inside", "outside", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present invention.
[0029] In the description of the present utility model, it should be noted that, unless otherwise clearly stipulated and limited, the terms "installed", "connected", "connected" and "set" should be understood in a broad sense. For example, it can be fixedly connected or set, or it can be detachably connected or set, or integrally connected or set. For ordinary technicians in this field, the specific meanings of the above terms in the utility model can be understood according to the specific circumstances.
[0030] Example:
[0031] like Figure 1-Figure 2 As shown, the utility model provides a seamless combination device for the outer line track of the ground cover development section, which is suitable for the ground cover development section of urban rail transit. By adjusting the design of the first-level ballast roadbed 4, adopting the new III-type bridge sleeper 3 and encrypting the sleeper arrangement, optimizing the slope of the ballast shoulder and the roadbed side slope 7 on the outer side of the curve, using frozen joints to connect the rail joints in the turnout area, using flash welding joints to connect the rail joints in other sections and filling the ballast between lines, the small radius curve of the outer line is realized seamlessly, and the rail joints are eliminated. The device includes rails 1, joints 2, new III-type bridge sleepers 3, a first-level ballast roadbed 4, inter-line filling ballast 5, ballast shoulder pile 6, roadbed side slope 7 and ballast retaining blocks 8.
[0032] The primary ballast bed 4 is laid on the lower foundation of the section, and the new type III bridge sleeper 3 is laid on the primary ballast bed 4. When laying the new type III bridge sleeper 3, the primary ballast bed 4 should be rammed in time to meet the relevant requirements. The rails 1 are fixed on the new type III bridge sleeper 3, and the rails 1 are fixedly connected by the joints 2.
[0033] The thickness of the primary ballast track bed 4 is not less than 250 mm, and the primary ballast track bed 4 on the outside of the small radius curve is widened by 200 mm on the inside of the small radius curve.
[0034] The sleeper spacing of the new III-type bridge sleeper 3 is optimized to 650mm to meet the requirements of seamless line stability. The new III-type bridge sleeper 3 has a larger cross-sectional area than the type II sleeper currently used in the domestic outer line, has a greater lateral resistance, and can better maintain the stability of the seamless line in small radius curve sections.
[0035] The rails in the turnout area are fixedly connected by frozen joints, and the rails outside the depot are fixedly connected by flash welding joints. The welding quality of the joints meets the relevant requirements.
[0036] The rail 1 is a seamless rail, and the rail 1 is fixed to the new III-type bridge sleeper 3 by fasteners.
[0037] The inter-line filling ballast 5 is filled between the two-line primary ballast roadbed 4, the ballast shoulder pile 6 is arranged on the outside of the small radius curve, the roadbed slope 7 is arranged on the inside and outside of the small radius curve, and the ballast retaining block 8 is arranged at the slope foot on both sides of the primary ballast roadbed 4 and connected to the roadbed slope 7.
[0038] The slope of the ballast bed side slope 7 outside the small radius curve is 1:1.75, and the slope of the ballast bed side slope 7 inside the small radius curve is 1:1.5. The optimized slope of the ballast bed side slope 7 outside the small radius curve provides favorable protection for the small radius seamless line.
[0039] The height of the ballast shoulder pile 6 is 150 mm. For the outside of the small radius curve, on the one hand, the first-level ballast bed 4 is widened, and on the other hand, the ballast shoulder pile 6 is set, which can provide a larger lateral roadbed resistance on the outside of the small radius curve, providing favorable protection for the laying of seamless lines.
[0040] The inter-line filling ballast 5 is used to fill the first-level ballast roadbed 4 between two lines with a spacing of no more than 5m, so as to further enhance the lateral resistance of the first-level ballast roadbed 4 and ensure the stability of the seamless line in a small radius section.
[0041] The installation process of this embodiment is as follows:
[0042] Firstly, the primary ballast track bed 4 is laid on the lower foundation of the section, the track bed slope 7 of 1:1.75 is adopted on the outer side of the small radius curve, and the ballast shoulder pile 6 is set, the track bed slope 7 of 1:1.5 is adopted on the inner side of the small radius curve, the ballast retaining blocks 8 are set at the slope feet on both sides of the primary ballast track bed 4, the line spacing between the two lines of the primary ballast track bed 4 is less than 5m. The line filling ballast 5 is used to fill the space between the line filling ballast 5, and then the new III type sleeper 3 is laid on the primary ballast track bed 4. The primary ballast track bed 4 should be tamped in time after laying the new III type sleeper 3 to meet the relevant requirements, and finally the rail 1 is fixed to the new III type sleeper 3 by fasteners, the joint 2 of the rail 1 in the turnout area is a frozen joint, and the joint 2 of the rail 1 in other sections is a flash welded joint, and the joint welding quality should meet the relevant requirements.
[0043] The above specific examples are used to illustrate the present invention, which are only used to help understand the present invention and are not intended to limit the present invention. For those skilled in the art of the present invention, some simple deductions, deformations or substitutions can be made based on the idea of the present invention.
Claims
1. A seamless assembly device for outer track of a ground cover development field section depot, characterized in that: The device comprises a rail (1), a joint (2), a new III-type bridge sleeper (3), a first-level ballast track bed (4), inter-line filling ballast (5), a ballast shoulder pile (6), a track bed slope (7) and a ballast retaining block (8); The first-level ballast track bed (4) is laid on the lower foundation of the section, the new type III bridge sleeper (3) is laid on the first-level ballast track bed (4), the steel rails (1) are fixed on the new type III bridge sleeper (3), and the steel rails (1) are fixedly connected by the joints (2); The inter-line filling ballast (5) is filled between the first-level ballast roadbeds (4) of the two lines, the ballast shoulder pile (6) is arranged outside the small radius curve, the roadbed side slopes (7) are arranged inside and outside the small radius curve, and the ballast retaining blocks (8) are arranged at the slope feet on both sides of the first-level ballast roadbed (4) and connected to the roadbed side slopes (7).
2. According to claim 1, a ground cover development field section depot outer track seamless assembly device is characterized by: The thickness of the primary ballast bed (4) is not less than 250 mm.
3. According to claim 1, a ground cover development field section depot outer track seamless assembly device is characterized by: The first-level ballast roadbed (4) outside the small radius curve is widened by 200 mm inside the small radius curve.
4. According to claim 1, a ground cover development field section depot outer track seamless assembly device is characterized by: The slope of the ballast side slope (7) outside the small radius curve is 1:1.
75.
5. According to claim 1, a seamless assembly device for outer track of a ground cover development field section depot, characterized in that: The slope of the ballast side slope (7) on the inner side of the small radius curve is 1:1.
5.
6. According to claim 1, a seamless assembly device for outer track of a ground cover development field section depot, characterized in that: The height of the ballast pile (6) is 150 mm.
7. The seamless assembly device for outer track of a ground cover development field section depot according to claim 1 is characterized by: The inter-line filling ballast (5) is used to fill the space between the first-level ballast roadbeds (4) of two lines with a spacing of no more than 5m.
8. The seamless assembly device for outer track of a ground cover development field section depot according to claim 1 is characterized by: The sleeper spacing of the new III type bridge sleeper (3) is 650mm.
9. The seamless assembly device for outer track of a ground cover development field section depot according to claim 1 is characterized by: The steel rails (1) in the turnout area are fixedly connected by frozen joints, and the steel rails (1) in the outer line of the depot are fixedly connected by flash welding joints.
10. The seamless assembly device for outer track of a ground cover development field section depot according to claim 1 is characterized by: The steel rail (1) is a seamless steel rail, and the steel rail (1) is fixed to the new III-type bridge sleeper (3) via fasteners.