A sleeper plate track structure with an isolation buffer pad on a steel truss

Abstract

The present invention provides a sleeper plate type track structure with an isolation buffer pad on a steel truss, which is arranged on a steel truss (1), and comprises a sleeper plate (3), and also comprises an isolation buffer pad (2) arranged between the sleeper plate (3) and the main longitudinal beam of the steel truss (1); the steel truss (1) is provided with a plurality of welding limiters (12), a sleeve (6) is arranged between the welding limiter (12) and the limit hole (31) of the sleeper plate, the sleeve (6) and the welding limiter (12) are directly fixedly connected by a T-bolt (4), and the top of the sleeve (6) is pressed on the sleeper plate (3); the isolation buffer pad (2) absorbs part of the vibration energy of the vehicle track system under the fixation of the sleeve (6) and the T-bolt (4), thereby realizing the isolation and buffering function between the sleeper plate (3) and the steel truss (1), thereby ensuring the stability and safety of the track structure.

Description

Technical Field

[0001] The embodiments of the present invention belong to the technical field of railway track structures, and more specifically, to a sleeper plate track structure with an isolation buffer pad on a steel truss. Background Art

[0002] Steel truss structure is the main structural type commonly used in modern railway bridges. It has outstanding advantages such as simple structure, convenient construction, and strong bearing capacity. It is widely used in the construction of conventional railways, high-speed railways, and intercity railways. At present, the track structures commonly used for railway steel trusses at home and abroad include wooden sleeper open bridge deck track, ballasted track, synthetic resin sleeper track, and sleeper plate track. The traditional open bridge deck railway steel truss bridge adopts a longitudinal and transverse beam system. The rails are connected to the sleepers through fasteners and spikes, and the sleepers are connected to the steel beams through bolts. It has the advantage of a small structural deadweight, but because the pressure of the wooden sleeper spikes is relatively small, it is generally only suitable for railways with speeds not exceeding 120km / h. In addition, wooden sleepers are prone to decay, wear and cracking, and the structural life is short. For ballasted tracks, for high-speed railway steel truss cable-stayed bridges, concrete combined beam decks or orthotropic plate steel decks are often used. A reinforced concrete ballast trough is set on the bridge deck, and ballast tracks are laid in the trough. However, since the bridge deck is covered by the ballast trough, the bridge deck system is not easy to inspect and maintain. In addition, ballasted track has a large deadweight; synthetic resin sleeper track uses resin synthetic sleepers with good corrosion resistance, weather resistance and fatigue resistance to replace wooden sleepers, which effectively solves the service life problem of wooden sleepers. However, synthetic resin sleepers are too expensive and are not suitable for large-scale laying applications.

[0003] In comparison, the sleeper slab track can improve the stability and durability of the track structure, reduce the workload of maintenance and repair, while reducing the track construction height and the second phase constant load of the bridge, and reducing the cost of the main bridge project.

[0004] However, on the one hand, the existing track plate and the steel truss bridge deck are isolated by a concrete cushion layer, such as patent ZL2018200516339 discloses a plate-type ballastless track for a track line on a steel truss bridge. In the plate-type ballastless track structure on a steel truss in the above patent, the track plate and the steel truss bridge deck are isolated by a concrete cushion layer. When the train load passes through, there is no good isolation and buffering measure between the track plate and the steel truss, which is not conducive to the mutual adaptation of the deformation of the track plate and the steel truss. The steel truss vibrates greatly, and there is a possibility of vibration cracking of the concrete cushion layer between the track plate and the steel truss, which affects the safety and stability of train operation and the structural stability of the steel truss bridge.

[0005] On the other hand, ordinary bridges are fully supported structures, and the deadweight of the steel truss above the buffer layer can achieve the compression of each layer of the structure. However, in the track with sleeper plates laid on the steel trusses, high-strength bolts are required to connect the track structure to the bridge. Therefore, in the plate track structure, the setting of high-strength bolts to achieve the compression function is a major problem. Summary of the invention

[0006] In view of the above defects or improvement needs of the prior art, the present invention provides a sleeper plate type track structure with an isolation buffer pad on a steel truss, which adopts an isolation buffer pad to absorb part of the energy of the vehicle track system vibration, and realizes the isolation and buffering function between the sleeper plate and the steel truss when fixed with a sleeve and a T-bolt.

[0007] To achieve the above object, a sleeper plate type track structure with an isolation buffer pad on a steel truss is provided, which is arranged on the steel truss, and includes a sleeper plate and an isolation buffer pad arranged between the sleeper plate and the main longitudinal beam of the steel truss; and,

[0008] A plurality of welding limiters are arranged on the steel truss, and a sleeve is arranged between the welding limiter and the limit hole of the sleeper plate. The sleeve and the welding limiter are directly fixedly connected by T-bolts, and the top of the sleeve is pressed on the sleeper plate; the isolation and buffer pad is fixed by the sleeve and the T-bolts, thereby realizing the isolation and buffering function between the sleeper plate and the steel truss.

[0009] Furthermore, the welding limiter corresponds to the through hole of the isolation buffer pad and the limit hole of the sleeper plate respectively.

[0010] Furthermore, the sleeve includes a sleeve cover, a sleeve bolt hole and a sleeve positioning boss.

[0011] Furthermore, the welding limiter is provided with a T-bolt hole and a limit slot.

[0012] Furthermore, the sleeve positioning boss is arranged at the bottom of the sleeve cover and matches with the limiting slot.

[0013] Furthermore, the sleeve bolt hole matches the T-bolt.

[0014] Furthermore, a prefabricated kit is provided between the sleeve and the limiting hole of the sleeper plate.

[0015] Furthermore, a high-strength washer, a nut and a cap are sequentially arranged on the top of the T-bolt from bottom to top.

[0016] Furthermore, the sleeper plate is also provided with an embedded sleeve for installing the rail and fastener system.

[0017] Furthermore, the transverse span of the isolation buffer pad is the same as the transverse width of the main longitudinal beam of the steel truss; the longitudinal span of the isolation buffer pad is consistent with the longitudinal length of the sleeper plate.

[0018] In general, the above technical solutions conceived by the present invention can achieve the following beneficial effects compared with the prior art:

[0019] (1) The sleeper plate type track structure with an isolation buffer pad on the steel truss of the present invention realizes better isolation and buffering between the sleeper plate and the steel truss by means of the isolation buffer pad provided between the sleeper plate and the steel truss; under the limiting action of the sleeve and the T-bolt, the isolation buffer pad absorbs part of the energy of the vehicle track system vibration, realizes the isolation and buffering function between the sleeper plate and the steel truss, and ensures the stability and safety of the track structure.

[0020] (2) The sleeper plate track structure with an isolation buffer pad on the steel truss of the present invention adopts a method of arranging a welded limiter on the steel truss to make the high-strength bolts directly contact with the welded limiter, thereby avoiding the problem of tightening the high-strength bolts due to direct contact between the high-strength bolts and the isolation buffer pad, and can ensure the elasticity of the isolation buffer pad, further enhancing the stability of the track and bridge structure.

[0021] (3) In the sleeper plate track structure with an isolation buffer pad on a steel truss beam of the present invention, the sleeper plate can be quickly positioned by matching the sleeper plate limiting hole with the welded limiting piece. At the same time, the vertical position of the sleeper plate can be fixed, which simplifies the structure of the traditional sleeper plate and improves the strength of the sleeper plate.

[0022] (4) In the sleeper-plate track structure with an isolation buffer pad on the steel truss of the present invention, a prefabricated kit is provided between the sleeve and the limiting hole of the sleeper plate. The prefabricated kit is an elastic structure for filling the gap between the sleeve and the limiting hole of the sleeper plate, and also for filling the defect that the gap cannot be filled with elastic resin or other materials, so that the overall bridge structure has a buffering effect in the lateral direction.

[0023] (5) The sleeper plate track structure with an isolation buffer pad on the steel truss of the present invention has welded limiters directly welded on the steel truss for installation and fixation of the track structure. This avoids the traditional sleeper plate track structure of drilling holes on the steel truss, improves the flexibility of sleeper plate construction, and reduces the strength design requirements of steel truss bridges. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is an overall structural diagram of a sleeper slab track structure with an isolation buffer pad on a steel truss according to an embodiment of the present invention;

[0025] Figure 2This is a transverse cross-sectional view of a sleeper plate track structure with an isolation buffer pad on a steel truss according to an embodiment of the present invention;

[0026] Figure 3 This is a front view of a sleeper plate track structure with an isolation buffer pad on a steel truss according to an embodiment of the present invention;

[0027] Figure 4 This is an exploded view of a sleeper plate track structure with an isolation buffer pad on a steel truss according to an embodiment of the present invention;

[0028] Figure 5 It is an exploded side view of a sleeper plate track structure with an isolation buffer pad on a steel truss according to an embodiment of the present invention;

[0029] Figure 6 This is a schematic diagram of a steel truss structure involved in an embodiment of the present invention;

[0030] Figure 7 A three-dimensional diagram of a sleeve according to an embodiment of the present invention;

[0031] Figure 8 A top view of a sleeve according to an embodiment of the present invention;

[0032] Fig. 9 A schematic diagram of a T-bolt according to an embodiment of the present invention;

[0033] Fig.10 A schematic diagram of an isolation buffer pad according to an embodiment of the present invention;

[0034] Fig.11 It is a schematic diagram of the sleeper plate structure involved in an embodiment of the present invention.

[0035] In all the drawings, the same reference numerals represent the same technical features, specifically:

[0036] In the figure: 1-steel truss, 2-isolation buffer pad, 3-sleeper plate, 4-T-bolt, 5-prefabricated kit, 6-casing, 7-high-strength washer, 8-nut, 9-cap, 10-rail, 11-fastener system, 12-welding limiter, 13-T-bolt hole, 14-welding limiter slot; 31-sleeper plate limiter hole, 32-embedded casing; 41-T-bolt rod; 61-casing cover, 62-casing bolt hole, 63-casing positioning boss. DETAILED DESCRIPTION

[0037] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention. In addition, the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0038] Combination Figure 1 to Figure 5 The sleeper plate track structure with an isolation buffer pad laid on the steel truss of the present invention is arranged on the steel truss 1, and includes an isolation buffer pad 2, a sleeper plate 3, a T-bolt 4, a prefabricated kit 5, a sleeve 6, a high-strength washer 7, a nut 8, a cap 9, a rail 10, a fastener system 11, a welding limiter 12, a T-bolt hole 13, and a welding limiter slot 14.

[0039] Specifically, an isolation buffer pad 2 is provided between the sleeper plate 3 and the steel truss 1. Figure 6 The steel truss structure diagram of the embodiment of the present invention is shown in FIG. Figure 6 A plurality of welding stoppers 12 are welded on the steel truss 1, which correspond to the through holes of the isolation buffer pad 2 and the sleeper plate stopper holes 31 provided on the sleeper plate 3, respectively, for the passage of the welding stoppers 12. A sleeve 6 is also provided between the sleeper plate stopper holes 31 and the welding stoppers 12. The hollow sleeve 6 is sleeved on the outside of the welding stopper 12, and the bottom of the sleeve 6 passes through the isolation buffer pad 2, and the sleeve cover 61 at the top is pressed on the sleeper plate 3. The sleeper plate 3 can quickly locate the position of the sleeper plate 3 by matching the sleeper plate stopper holes 31 with the welding stoppers 12.

[0040] Further, Figure 6 Schematic diagram of the steel truss structure involved in the embodiment of the present invention, such as Figure 6 As shown, a T-bolt hole 13 and a limiting slot 14 are provided in the welding limiting member 12; wherein, the T-bolt hole 13 corresponds to the T-bolt hole 13, and the limiting slot 14 is avoided from the T-bolt hole 13. Preferably, the limiting slot 14 and the T-bolt hole 13 are at a right angle.

[0041] Figure 7 is a three-dimensional diagram of a sleeve according to an embodiment of the present invention, Figure 8 FIG. 1 is a top view of a sleeve according to an embodiment of the present invention. Figure 6 , Figure 7 and Figure 8The sleeve 6 includes a sleeve cover 61, a sleeve bolt hole 62 and a sleeve positioning boss 63. Among them, the sleeve bolt hole 62 corresponds to the T-bolt 4 and is used for the T-bolt 4 to pass through; the sleeve positioning boss 63 is arranged at the bottom of the sleeve cover 61, and matches with the limiting card slot 14, that is, the sleeve positioning boss 63 has the same shape and size as the limiting card slot 14. The sleeve bolt hole 62 and the sleeve positioning boss 63 are staggered. Preferably, the sleeve bolt hole 62 is arranged at the center of the sleeve cover 61. The sleeve cover 61 is pressed on the top of the sleeper plate 3, and the cross-sectional area of ​​the sleeve cover 61 is larger than the cross-sectional area of ​​the sleeve 6 tank body.

[0042] The sleeve 6 is fixedly connected to the steel truss (i.e., the welding stopper 12) through the T-bolt 4 provided in the T-bolt hole 13. The vertical position of the sleeper plate can be fixed by the vertical stopper of the sleeve cover 61 and the steel truss 1, which simplifies the structure of the traditional sleeper plate and improves the strength of the sleeper plate.

[0043] In addition, a prefabricated kit 5 is provided between the sleeve 6 and the sleeper plate limiting hole 31. The prefabricated kit 5 is sleeved on the outside of the sleeve 6, and the size of the prefabricated kit 5 is determined according to the size of the sleeve 6 and the space between the sleeve 6 and the sleeper plate limiting hole 31. The prefabricated kit 5 is an elastic structure, which is used to fill the gap between the sleeve 6 and the sleeper plate limiting hole 31, and also makes up for the defect that the gap cannot be filled with elastic resin and other materials, so that the overall bridge structure has a buffering effect in the lateral direction.

[0044] The T-bolt rod 41 of the T-bolt 4 is rotatably installed in the welding stopper 12 along the T-bolt hole 14, and a high-strength washer 7, a nut 8 and a cap 9 are arranged on the top of the T-bolt rod 41 from bottom to top. The installation sequence is: the T-bolt rod 41 is rotatably installed in the welding stopper 13, and the prefabricated kit 5 is continuously installed, and then the sleeve 6 is installed; the T-bolt rod 41 passes through the sleeve bolt hole 62, and the sleeve positioning boss 63 is matched and positioned with the slot 15; finally, the high-strength washer 7, the nut 8, and the cap 9 are installed on the T-bolt rod 41 in sequence, and the T-bolt is tightened to fix the sleeve 6 and the welding stopper 13.

[0045] in addition, Fig.11 FIG. 1 is a schematic diagram of the sleeper plate structure according to an embodiment of the present invention. Fig.11 As shown, the sleeper plate 3 is also provided with an embedded sleeve 32 , which is used to install the rail 10 and the fastener system 11 .

[0046] Preferably, the transverse span of the isolation buffer pad 2 is the same as the transverse width of the main longitudinal beam of the steel truss 1 ; the longitudinal span of the isolation buffer pad 2 is consistent with the longitudinal length of the prefabricated sleeper plate 3 .

[0047] Preferably, the sleeve 6 and the welding stopper 12 are both prefabricated parts and have a good matching relationship.

[0048] In the track structure of the present invention, the isolation buffer pad 2 is arranged between the sleeper plate 3 and the steel truss 1. A certain amount of pre-compression is set during installation to fix the isolation buffer pad 2, achieve better isolation and buffering between the sleeper plate and the steel truss, and adapt to the deformation between the sleeper plate and the steel truss, thereby ensuring the safety and stability of the vehicle-track-bridge system. The fixing structure between the sleeve and the steel truss realizes the vertical limit of the sleeper plate. The sleeve and the truss jointly constrain the position of the sleeper plate. When the train passes through the track structure, due to the effect of the train load, the sleeper plate 3 compresses the isolation buffer pad 2 downward. The isolation buffer pad absorbs part of the energy of the vehicle track system vibration, realizes the isolation and buffering function between the sleeper plate and the steel truss, and adapts to the deformation between the sleeper plate and the steel truss; after the train passes through the track structure, the sleeper plate 3 returns to its initial position upward. At the same time, due to the limiting effect of the sleeve 6, the geometric position of the sleeper plate 3 can be maintained, thereby improving the safety and stability of the line. The present invention also optimizes the working environment of the steel truss bridge and the track structure, and improves the overall durability of the steel truss and the track structure.

[0049] The existing plate track structure uses bolts to pass through the sleeper plate, concrete layer and steel truss in sequence, but uses an isolation buffer pad instead of the concrete layer. If the traditional method is used, when the bolt passes through the isolation buffer pad, there will be a tightness problem due to the material difference between the metal bolt and the isolation buffer pad. If the bolt is tightened too much, the isolation buffer pad will be crushed and cannot play an elastic role. If it is tightened too loose, the bolt will not play a role in fixing the sleeper plate and the steel truss. The sleeper plate track structure with an isolation buffer pad laid on the steel truss of the present invention adopts the method of setting a welding limiter on the steel truss to make the bolt directly contact with the welding limiter, thereby avoiding the problem of bolt tightening caused by direct contact between the bolt and the isolation buffer pad, and can ensure the elasticity of the isolation buffer pad, further enhancing the stability of the track and bridge structure.

[0050] In the sleeper plate track structure with an isolation buffer pad laid on the steel truss of the present invention, under the limiting action of the sleeve on the steel truss and the welded limiting piece, the sleeper plate can compress the isolation buffer pad downward under the action of the train load, and has no space for upward movement, thereby ensuring the stability and safety of the track structure. At the same time, the lateral displacement and longitudinal displacement of the sleeper plate are limited by the prefabricated kit, realizing the buffering effect of the track structure in the vertical and horizontal directions.

[0051] The welding stopper of the present invention is directly welded on the steel truss for installation and fixation of the track structure, avoiding the solution of drilling holes on the steel truss in the traditional sleeper plate track structure, improving the flexibility of sleeper plate construction, and reducing the strength design requirements of the steel truss bridge.

[0052] The present invention proposes a sleeper plate track structure with an isolation buffer pad on a steel truss, which can safely, quickly and accurately lay the sleeper plate track on a steel truss bridge deck, while having an effective isolation buffer effect and adapting to the deformation between the sleeper plate and the steel truss.

[0053] It will be easily understood by those skilled in the art that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A sleeper plate type track structure with an isolation buffer pad on a steel truss, arranged on a steel truss (1), comprising a sleeper plate (3), characterized in that: It also includes an isolation buffer pad (2) arranged between the sleeper plate (3) and the main longitudinal beam of the steel truss (1); and, The steel truss (1) is provided with a plurality of welding stoppers (12), a sleeve (6) is provided between the welding stoppers (12) and the stopper holes (31) of the sleeper plates, the sleeve (6) and the welding stoppers (12) are directly fixedly connected via T-bolts (4), and the top of the sleeve (6) is pressed onto the sleeper plates (3); the isolation buffer pad (2) is fixed by the sleeve (6) and the T-bolts (4), thereby realizing the isolation and buffering function between the sleeper plates (3) and the steel truss (1).

2. The sleeper plate track structure with isolation buffer pads on steel trusses according to claim 1, characterized in that: The welding stopper (12) corresponds to the through hole of the isolation buffer plate (2) and the stopper hole (31) of the sleeper plate respectively.

3. A sleeper plate track structure with an isolation buffer pad on a steel truss according to claim 1 or 2, characterized in that: The sleeve (6) comprises a sleeve cover (61), a sleeve bolt hole (62) and a sleeve positioning boss (63).

4. The sleeper plate track structure with isolation buffer pads on steel trusses according to claim 3, characterized in that: The welding limiter (12) is provided with a T-shaped bolt hole (13) and a limiter slot (14).

5. The sleeper plate track structure with isolation buffer pads on steel trusses according to claim 4, characterized in that: The sleeve positioning boss (63) is arranged at the bottom of the sleeve cover (61) and matches the limiting slot (14).

6. The sleeper plate track structure with isolation buffer pads on steel trusses according to claim 3, characterized in that: The sleeve bolt hole (62) matches the T-bolt (4).

7. A sleeper plate track structure with an isolation buffer pad on a steel truss according to any one of claims 1-2 and 4-6, characterized in that: A prefabricated kit (5) is also provided between the sleeve (6) and the sleeper plate limiting hole (31).

8. A sleeper plate track structure with an isolation buffer pad on a steel truss according to any one of claims 1-2 and 4-6, characterized in that: The top of the T-bolt (4) is provided with a high-strength washer (7), a nut (8) and a cap (9) in sequence from bottom to top.

9. A sleeper slab track structure with an isolation buffer pad on a steel truss according to any one of claims 1-2 and 4-6, characterized in that: The sleeper plate (3) is also provided with an embedded sleeve (32) for installing the rail (10) and the fastener system (11).

10. A sleeper slab track structure with an isolation buffer pad on a steel truss according to any one of claims 1-2 and 4-6, characterized in that: The transverse span of the isolation buffer pad (2) is the same as the transverse width of the main longitudinal beam of the steel truss (1); and the longitudinal span of the isolation buffer pad (2) is consistent with the longitudinal length of the sleeper plate (3).

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