A steel-concrete composite sleeper ballastless track with vibration reduction function and its construction method

Abstract

The application discloses a steel pipe concrete sleeper type ballastless track with a damping function and a construction method, and belongs to the technical field of ballastless tracks. The ballastless track comprises two steel rails, a plurality of fasteners, a plurality of steel pipe concrete sleepers, a plurality of track bed plates and a plurality of steel bottom plates. The plurality of steel pipe concrete sleepers are parallel and spaced apart and are inserted into the track bed plates. Each track bed plate is provided with a plurality of upper steel pipes and a plurality of steel springs, the plurality of upper steel pipes are arranged in two rows, each steel spring is inserted into a corresponding upper steel pipe, and the upper steel pipes and the steel springs are arranged to protrude from the track bed plates. The top surface of each steel bottom plate is fixedly provided with a plurality of lower steel pipes, the bottom end of each upper steel pipe is coaxially and slidably inserted into a corresponding lower steel pipe, and the bottom end of each steel spring is inserted into a corresponding lower steel pipe. The steel pipe concrete sleeper type ballastless track with the damping function provided by the application can not only improve the geometric position keeping capacity of the sleepers, but also effectively buffers and damps the sleepers.

Description

Technical Field

[0001] This invention belongs to the field of ballastless track technology, and more specifically, relates to a steel-concrete composite sleeper ballastless track with vibration reduction function and its construction method. Background Technology

[0002] Track systems are classified into two types according to the form of the track bed: ballasted track and ballastless track. The track bed of ballasted track is constructed from ballast, while the track bed of ballastless track is constructed from reinforced concrete. Compared with ballasted track, ballastless track has significant advantages such as better overall integrity, better stability, better track assembly retention, and less maintenance workload.

[0003] Currently, the application of concrete-filled steel tube sleepers in ballastless tracks is becoming increasingly common. Concrete-filled steel tube sleepers are formed by integrally molding concrete-filled steel tubes and sleeper blocks, that is, the concrete-filled steel tubes are formed at the same time as the sleeper blocks are poured. The concrete-filled steel tubes are designed to be composed of multiple hollow steel tubes, which effectively increases the sleeper's geometric position retention capability, reduces the amount of steel tubes used, improves workability, and can be directly constructed on site, meeting the requirements for sleeper bending and torsional resistance.

[0004] However, although the aforementioned ballastless track improves the sleeper's ability to maintain geometric position, the sleeper's vibration reduction function is often difficult to achieve, leading to noise pollution from the ballastless track. Furthermore, the sleeper's longitudinal and lateral limiting capabilities are weak during vibration reduction, making it impossible to guarantee the safety of the ballastless track. Summary of the Invention

[0005] In view of the above-mentioned defects or improvement needs of the existing technology, the present invention provides a steel tube concrete sleeper ballastless track with vibration reduction function and a construction method thereof. The purpose is not only to improve the sleeper's geometric position retention ability, but also to effectively buffer and reduce vibration of the sleeper, avoid noise pollution, and effectively limit longitudinal and lateral movement during the vibration reduction process to ensure the safety of the ballastless track.

[0006] In a first aspect, the present invention provides a steel-concrete composite sleeper-type ballastless track with vibration reduction function, the ballastless track comprising two rails, multiple fasteners, multiple steel-concrete composite sleepers, multiple track bed slabs and multiple steel base plates arranged sequentially from top to bottom;

[0007] Multiple steel-concrete composite sleepers are inserted in parallel and spaced apart into each of the track slabs;

[0008] Multiple track slabs are arranged sequentially along the length of the rail, and each track slab is a concrete casting structure. Multiple upper steel pipes and multiple steel springs are fixedly inserted into the bottom of each track slab. The multiple upper steel pipes are arranged in two rows at intervals. Each steel spring is inserted into the corresponding upper steel pipe, and both the upper steel pipe and the steel spring protrude from the corresponding track slab.

[0009] Multiple steel base plates are arranged sequentially along the length of the rail. Multiple lower steel pipes are fixedly arranged on the top surface of each steel base plate. The bottom end of each upper steel pipe is slidably and coaxially inserted into the corresponding lower steel pipe. The bottom end of each steel spring is inserted into the corresponding lower steel pipe and abuts against the corresponding steel base plate. Connecting bolts are inserted into each steel base plate to connect to the bottom foundation of the rail.

[0010] Optionally, the ballastless track further includes a plurality of steel pads, which are stacked in parallel, and each of the connecting bolts passes through the plurality of steel pads.

[0011] Optionally, the number of steel pads is 2-5.

[0012] Optionally, the thickness of the steel base plate is 20-50mm.

[0013] Optionally, the steel base plate is welded to a plurality of the lower steel pipes.

[0014] Optionally, the outer diameter of each of the upper steel pipes is 150 mm, and the inner diameter of each of the lower steel pipes is 150.5 mm.

[0015] Secondly, the present invention provides a construction method for a steel-concrete composite sleeper-type ballastless track with vibration reduction function, the construction method being based on the ballastless track described in the first aspect, the construction method comprising:

[0016] Steel pipes are arranged inside the mold and reinforced concrete is poured in, and the steel pipe concrete sleeper is integrally cast.

[0017] Multiple steel-concrete composite sleepers, multiple upper steel pipes, and multiple steel springs are placed at intervals in the track bed slab reinforcement cage, and formwork is erected around the track bed slab reinforcement cage to pour concrete into the track bed slab reinforcement cage, thereby forming the track bed slab and curing it.

[0018] Multiple spiral sleeves are pre-embedded in the foundation at the bottom of the track, and each spiral sleeve is matched with the corresponding connecting bolt.

[0019] According to the setting requirements, multiple steel base plates and multiple track bed plates are arranged sequentially on the bottom of the track, so that each upper steel pipe and each steel spring are inserted into the corresponding lower steel pipe;

[0020] The corresponding spiral sleeves are connected by the connecting bolts, and the fasteners and rails are arranged sequentially on the steel pipe concrete sleeper.

[0021] Optionally, the step of arranging steel pipes in a mold and pouring reinforced concrete to integrally cast the steel-concrete sleeper includes:

[0022] Steel pipes and two connecting ribs are arranged inside the mold, and reinforced concrete is poured in to integrally form the steel pipe concrete sleeper. Each of the connecting ribs protrudes from the bottom of the steel pipe concrete sleeper.

[0023] Optionally, the step of placing multiple steel-concrete composite sleepers, multiple upper steel pipes, and multiple steel springs at intervals into the track slab reinforcement cage, and erecting formwork around the track slab reinforcement cage to pour concrete into the track slab reinforcement cage, thereby forming the track slab and curing it, includes:

[0024] Each of the connecting ribs and the corresponding upper steel pipe and steel spring are welded together.

[0025] Multiple steel-concrete composite sleepers are placed at intervals in the track bed slab reinforcement cage, and formwork is erected around the track bed slab reinforcement cage to pour concrete into the track bed slab reinforcement cage, thereby forming the track bed slab and curing it.

[0026] Optionally, the connecting rib is a door rib.

[0027] The beneficial effects of the technical solution provided by the embodiments of the present invention are as follows:

[0028] For the steel-concrete composite sleeper ballastless track with vibration reduction function provided in the embodiments of the present invention, since multiple steel-concrete composite sleepers are inserted in parallel and spaced intervals into multiple track slabs, and each track slab is a concrete casting structure, the geometric position retention capability of the sleepers is improved through the steel-concrete composite sleepers and the casting of the track slabs.

[0029] Furthermore, since each steel spring is inserted into a corresponding upper steel pipe, and both the upper steel pipe and the steel spring protrude from the track bed slab, the bottom end of each upper steel pipe is slidably and coaxially inserted into a corresponding lower steel pipe, and the bottom end of each steel spring is inserted into a corresponding lower steel pipe and abuts against a corresponding steel base plate. At this point, the steel springs act on the track bed slab and the steel base plate respectively, effectively buffering and reducing vibration of the track bed slab and sleepers, thus avoiding noise pollution. In addition, through the sliding cooperation of the upper and lower steel pipes, longitudinal and lateral limiting can be effectively performed during vibration reduction, ensuring the safety of the ballastless track.

[0030] In other words, the steel-concrete composite sleeper ballastless track with vibration reduction function provided by the embodiments of the present invention can not only improve the sleeper's geometric position retention capability, but also effectively buffer and reduce vibration of the sleeper, avoid noise pollution, and effectively limit longitudinal and lateral movement during the vibration reduction process to ensure the safety of the ballastless track. Attached Figure Description

[0031] Figure 1This is a transverse sectional view of a steel-concrete composite sleeper ballastless track with vibration reduction function provided in an embodiment of the present invention;

[0032] Figure 2 This is a longitudinal sectional view of a steel-concrete composite sleeper ballastless track with vibration reduction function provided in an embodiment of the present invention;

[0033] Figure 3 This is a flowchart of a construction method for a steel-concrete composite sleeper ballastless track with vibration reduction function, provided in an embodiment of the present invention.

[0034] Figure 4 This is a flowchart of a construction method for another type of steel-concrete composite sleeper ballastless track with vibration reduction function, provided by an embodiment of the present invention.

[0035] The symbols in the diagram represent the following meanings:

[0036] 1. Rail; 2. Fastener; 3. Steel pipe concrete sleeper; 31. Steel pipe; 32. Sleeper block; 4. Track slab; 41. Upper steel pipe; 42. Steel spring; 43. Connecting rib; 5. Steel base plate; 51. Lower steel pipe; 52. Connecting bolt; 6. Steel pad. Detailed Implementation

[0037] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention. Furthermore, the technical features involved in the various embodiments of this invention described below can be combined with each other as long as they do not conflict with each other.

[0038] Figure 1 This is a transverse sectional view of a steel-concrete composite sleeper-type ballastless track with vibration reduction function provided in an embodiment of the present invention. Figure 2 This is a longitudinal sectional view of a steel-concrete composite sleeper-type ballastless track with vibration reduction function provided in an embodiment of the present invention, combined with... Figure 1 and Figure 2 As shown, the ballastless track includes two rails 1, multiple fasteners 2, multiple steel pipe concrete sleepers 3, multiple track bed slabs 4, and multiple steel base plates 5 arranged from top to bottom.

[0039] Multiple steel-concrete composite sleepers 3 are inserted in parallel at intervals into each track bed slab 4.

[0040] Multiple track slabs 4 are arranged sequentially along the length of the rail 1, and each track slab 4 is a concrete casting structure. Multiple upper steel pipes 41 and multiple steel springs 42 are fixedly inserted into the bottom of each track slab 4. The multiple upper steel pipes 41 are arranged in two rows at intervals, and each steel spring 42 is inserted into the corresponding upper steel pipe 41. Both the upper steel pipe 41 and the steel spring 42 protrude from the corresponding track slab 4.

[0041] Multiple steel base plates 5 are arranged sequentially along the length of the rail 1. Multiple lower steel pipes 51 are fixedly arranged on the top surface of each steel base plate 5. The bottom end of each upper steel pipe 41 is slidably and coaxially inserted into the corresponding lower steel pipe 51. The bottom end of each steel spring 42 is inserted into the corresponding lower steel pipe 51 and abuts against the corresponding steel base plate 5. Each steel base plate 5 is fitted with connecting bolts 52 to connect to the bottom foundation of the rail.

[0042] For the steel-concrete composite sleeper ballastless track with vibration reduction function provided in the embodiments of the present invention, since multiple steel-concrete composite sleepers 3 are inserted in parallel and spaced intervals into multiple track slabs 4, and each track slab 4 is a concrete casting structure, the geometric position retention capability of the sleepers is improved through the steel-concrete composite sleepers 3 and the casting of the track slabs 4.

[0043] Furthermore, since each steel spring 42 is inserted into the corresponding upper steel pipe 41, and both the upper steel pipe 41 and the steel spring 42 protrude from the track bed 4, the bottom end of each upper steel pipe 41 is slidably coaxially inserted into the corresponding lower steel pipe 51, and the bottom end of each steel spring 42 is inserted into the corresponding lower steel pipe 51 and abuts against the corresponding steel base plate 5. At this time, the steel springs 42 act on the track bed 4 and the steel base plate 5 respectively, which can effectively buffer and reduce vibration of the track bed 4 and the sleepers, avoiding noise pollution. In addition, through the sliding cooperation of the upper steel pipe 41 and the lower steel pipe 51, longitudinal and lateral limits can be effectively set during vibration reduction, ensuring the safety of the ballastless track.

[0044] In other words, the steel-concrete composite sleeper ballastless track with vibration reduction function provided by the embodiments of the present invention can not only improve the sleeper's geometric position retention capability, but also effectively buffer and reduce vibration of the sleeper, avoid noise pollution, and effectively limit longitudinal and lateral movement during the vibration reduction process to ensure the safety of the ballastless track.

[0045] It should be noted that the steel-concrete composite sleeper 3 includes at least one steel pipe 31 and two sleeper blocks 32. The two ends of each steel pipe 31 are respectively inserted into the two sleeper blocks 32. The steel pipe 31 is filled with concrete filler. The two sleeper blocks 32 and the concrete filler are integrally cast by concrete pouring.

[0046] See also Figure 1The ballastless track also includes multiple steel pads 6, which are stacked in parallel, and each connecting bolt 52 passes through multiple steel pads 6.

[0047] In the above embodiment, the steel pad 6 can adjust the height of the track bed slab 4, thereby adjusting the height of the rail 1 to accommodate height errors that occur during construction.

[0048] For example, the number of steel pads 6 can be 2-5.

[0049] In this embodiment, the thickness of the steel base plate 5 is 20-50mm.

[0050] It should be noted that the steel pad 6 and the track bed 4 have the same length and width, thus achieving uniform support for the track bed 4.

[0051] For example, the steel base plate 5 is welded to a plurality of lower steel pipes 51 to increase the connection strength between the steel base plate 5 and the lower steel pipes 51.

[0052] For example, the outer diameter of each upper steel pipe 41 is 150mm, and the inner diameter of each lower steel pipe 51 is 150.5mm. The 0.5mm gap ensures the vertical movement function when the vibration reduction function is realized, while limiting the minimal longitudinal and lateral displacement of the sleeper and track slab 4, thus ensuring the safety and stability of the structure.

[0053] The ballastless track provided by this invention has good vibration reduction and noise reduction functions through two rows of cooperating upper steel pipes 41, lower steel pipes 51 and corresponding steel springs 42. Actual tests show that it can achieve a noise reduction capability of 15-20dB, which greatly improves the vibration reduction efficiency.

[0054] Figure 3 This is a flowchart illustrating a construction method for a steel-concrete composite sleeper-type ballastless track with vibration reduction function, as provided in an embodiment of the present invention. Figure 3 As shown, this construction method is based on the aforementioned ballastless track, and the construction method includes:

[0055] S301. Arrange steel pipes 31 in the mold and pour reinforced concrete to form a steel pipe concrete sleeper 3 in one piece.

[0056] S302. Multiple steel pipe concrete sleepers 3, multiple upper steel pipes 41 and multiple steel springs 42 are placed at intervals in the track bed slab reinforcement cage, and formwork is erected around the track bed slab reinforcement cage to pour concrete into the track bed slab reinforcement cage, thereby forming multiple track bed slabs 4 and curing them.

[0057] S303. Multiple spiral sleeves are pre-embedded in the foundation at the bottom of the track, and each spiral sleeve is matched with the corresponding connecting bolt 52.

[0058] S304. According to the setting requirements, multiple steel base plates 5 and multiple track bed plates 4 are arranged sequentially on the bottom of the track, so that each upper steel pipe 41 and each steel spring 42 are inserted into the corresponding lower steel pipe 51.

[0059] S305. Connect the corresponding spiral sleeves through each connecting bolt 52, and arrange the fasteners 2 and rails 1 in sequence on the steel pipe concrete sleeper 3.

[0060] This invention provides a construction method for a steel-concrete composite sleeper ballastless track with vibration reduction function. The ballastless track obtained through construction can not only improve the sleeper's geometric position retention ability, but also effectively buffer and reduce vibration of the sleeper, avoid noise pollution, and effectively limit longitudinal and lateral movement during the vibration reduction process to ensure the safety of the ballastless track.

[0061] It should be noted that the concrete-filled steel pipe sleepers 3 and track slabs 4 are prefabricated in the factory in advance, thereby improving the efficiency of on-site construction.

[0062] Figure 4 This is a flowchart illustrating a construction method for another type of steel-concrete composite sleeper ballastless track with vibration reduction function, as provided in an embodiment of the present invention. Figure 4 As shown, this construction method is based on the aforementioned ballastless track, and the construction method includes:

[0063] S401. Arrange steel pipes 31 and two connecting ribs 43 in the mold and pour reinforced concrete to form a steel pipe concrete sleeper 3 in one piece. Each connecting rib 43 protrudes from the bottom of the steel pipe concrete sleeper 3.

[0064] In the above embodiment, on the one hand, by arranging the connecting ribs 43, the connection strength between the steel-concrete composite sleeper 3 and the track slab 4 can be increased during the subsequent pouring of the track slab 4. On the other hand, by arranging the connecting ribs 43, it is convenient to support and position the upper steel pipe 41 and the steel spring 42 during the subsequent pouring of the track slab 4, which also makes it convenient to pour the top of the upper steel pipe 41 and the steel spring 42 together into the track slab 4 during pouring.

[0065] For example, each sleeper block 32 is provided with a corresponding connecting rib 43.

[0066] S402. Weld and connect each connecting rib 43 and the corresponding upper steel pipe 41 and steel spring 42 respectively.

[0067] S403. Multiple steel pipe concrete sleepers 3 are placed at intervals in the track bed slab reinforcement cage, and formwork is erected around the track bed slab reinforcement cage to pour concrete into the track bed slab reinforcement cage, thereby forming the track bed slab 4 and curing it.

[0068] S404. Multiple spiral sleeves are pre-embedded in the foundation at the bottom of the track, and each spiral sleeve is matched with the corresponding connecting bolt 52.

[0069] S405. According to the setting requirements, multiple steel base plates 5 and multiple track bed plates 4 are arranged sequentially on the bottom of the track, so that each upper steel pipe 41 and each steel spring 42 are inserted into the corresponding lower steel pipe 51.

[0070] S406. Connect the corresponding spiral sleeves through each connecting bolt 52, and arrange the fasteners 2 and rails 1 in sequence on the steel pipe concrete sleeper 3.

[0071] For example, the connecting rib 43 can be a door rib.

[0072] Those skilled in the art will readily understand that the above description is merely 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 within the scope of protection of the present invention.

Claims

1. A construction method for a steel-concrete composite sleeper-type ballastless track with vibration reduction function, characterized in that, The construction method is based on ballastless track. The ballastless track includes two rails (1), multiple fasteners (2), multiple steel pipe concrete sleepers (3), multiple track slabs (4), and multiple steel base plates (5) arranged from top to bottom. Multiple steel-concrete composite sleepers (3) are inserted in parallel at intervals into each of the track bed slabs (4); Multiple track slabs (4) are arranged sequentially along the length of the rail (1), and each track slab (4) is a concrete casting structure. Multiple upper steel pipes (41) and multiple steel springs (42) are fixedly inserted into the bottom of each track slab (4). The multiple upper steel pipes (41) are arranged in two rows at intervals. Each steel spring (42) is inserted into the corresponding upper steel pipe (41), and both the upper steel pipe (41) and the steel spring (42) protrude from the corresponding track slab (4). Multiple steel base plates (5) are arranged sequentially along the length of the rail (1). Multiple lower steel pipes (51) are fixedly arranged on the top surface of each steel base plate (5). The bottom end of each upper steel pipe (41) is slidably and coaxially inserted into the corresponding lower steel pipe (51). The bottom end of each steel spring (42) is inserted into the corresponding lower steel pipe (51) and abuts against the corresponding steel base plate (5). Each steel base plate (5) is fitted with connecting bolts (52) to connect to the bottom foundation of the rail. The construction method includes: Steel pipes (31) are arranged in the mold and reinforced concrete is poured in, and the steel pipe concrete sleeper (3) is integrally cast. Multiple steel pipe concrete sleepers (3), multiple upper steel pipes (41) and multiple steel springs (42) are placed at intervals in the track bed slab reinforcement cage, and formwork is erected around the track bed slab reinforcement cage to pour concrete into the track bed slab reinforcement cage, thereby forming the track bed slab (4) and curing it. Multiple spiral sleeves are pre-embedded in the foundation at the bottom of the track, and each spiral sleeve is matched with the corresponding connecting bolt (52); According to the setting requirements, multiple steel base plates (5) and multiple track bed plates (4) are arranged sequentially on the bottom of the track, so that each upper steel pipe (41) and each steel spring (42) are inserted into the corresponding lower steel pipe (51); The corresponding spiral sleeves are connected by the connecting bolts (52), and the fasteners (2) and the rails (1) are arranged in sequence on the steel pipe concrete sleeper (3).

2. The construction method of a steel-concrete composite sleeper-type ballastless track with vibration reduction function according to claim 1, characterized in that, The process of arranging steel pipes (31) in a mold and pouring reinforced concrete to integrally cast the steel pipe concrete sleeper (3) includes: Steel pipes (31) and two connecting ribs (43) are arranged in the mold and reinforced concrete is poured in, and the steel pipe concrete sleeper (3) is integrally cast. Each of the connecting ribs (43) protrudes from the bottom of the steel pipe concrete sleeper (3).

3. The construction method of a steel-concrete composite sleeper-type ballastless track with vibration reduction function according to claim 2, characterized in that, The process of placing multiple steel-concrete composite sleepers (3), multiple upper steel pipes (41), and multiple steel springs (42) at intervals into the track bed slab reinforcement cage, erecting formwork around the track bed slab reinforcement cage, pouring concrete into the track bed slab reinforcement cage to form the track bed slab (4), and then curing it includes: Each of the connecting ribs (43) and the corresponding upper steel pipe (41) and steel spring (42) are welded and connected respectively. Multiple steel pipe concrete sleepers (3) are placed at intervals in the track bed slab reinforcement cage, and formwork is erected around the track bed slab reinforcement cage to pour concrete into the track bed slab reinforcement cage, thereby forming the track bed slab (4) and curing it.

4. The construction method of a steel-concrete composite sleeper-type ballastless track with vibration reduction function according to claim 2, characterized in that, The connecting bar (43) is a door bar.

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