CN-115787366-B - Steel pipe concrete sleeper for ballastless track

Abstract

The invention discloses a concrete filled steel tube sleeper for a ballastless track, and belongs to the technical field of ballastless tracks. The steel pipe concrete sleeper comprises a plurality of adjusting pipes and two sleeper units which are arranged at intervals. Each sleeper unit comprises a plurality of steel pipes and sleeper blocks, for any sleeper unit, the plurality of adjusting pipes correspond to the plurality of steel pipes one by one, one end of each steel pipe is inserted into each sleeper block, concrete filling materials are filled in each steel pipe, and each sleeper block and the corresponding concrete filling materials are integrally cast and formed through concrete. The other ends of the two opposite steel pipes are respectively movably and coaxially inserted into the two ends of the corresponding adjusting pipes so as to adjust the distance between the two sleeper blocks. According to the concrete filled steel tube sleeper for the ballastless track, the sleeper unit can be prepared in advance through pouring, the construction efficiency of the whole ballastless track is improved, and the track gauges of two steel rails can be adjusted, so that the track gauge meets the field installation requirement.

Inventors

• ZHU BIN
• YE SONG
• LIN CHAO
• REN XICHONG
• LIU JIE
• LIU YU
• GE CHENGBAO
• SUN LI
• LI QIHANG
• LI QIUYI
• ZHANG PENG
• ZHU JIANG
• YANG YANLI
• ZHANG ZHENG
• ZHANG SHIJIE

Assignees

• 中铁第四勘察设计院集团有限公司

Dates

Publication Date

20260505

Application Date

20221110

Claims (6)

1. 1. A concrete filled steel tube sleeper for ballastless tracks, characterized in that the concrete filled steel tube sleeper comprises a plurality of adjusting pipes (1) and two sleeper units (2) which are arranged at intervals; Each sleeper unit (2) comprises a plurality of steel pipes (21) and sleeper blocks (22), for any sleeper unit (2), the plurality of adjusting pipes (1) and the plurality of steel pipes (21) are in one-to-one correspondence, one end of each steel pipe (21) is inserted into each sleeper block (22), concrete filling materials are filled in each steel pipe (21), and each sleeper block (22) and the corresponding concrete filling materials are integrally cast and formed through concrete; The other ends of the two opposite steel pipes (21) are respectively and movably coaxially inserted into the two ends of the corresponding adjusting pipes (1) so as to adjust the distance between the two sleeper blocks (22); locking bolts (11) are respectively inserted into two ends of the adjusting pipe (1), each locking bolt (11) extends along the radial direction of the adjusting pipe (1), and each locking bolt (11) abuts against the corresponding steel pipe (21) after penetrating through the pipe wall of the adjusting pipe (1); The steel tube concrete sleeper further comprises an adjusting piece (3), the adjusting piece (3) comprises a spring (31) and two pushing plates (32), the outer peripheral wall of each pushing plate (32) is in sliding fit with the inner peripheral wall of the adjusting tube (1), two ends of the spring (31) are respectively connected with the two pushing plates (32), and the two pushing plates (32) are positioned between the two steel tubes (21); The two ends of the adjusting pipe (1) are respectively provided with a plurality of positioning holes (12), the positioning holes (12) extend along the axial direction of the adjusting pipe (1), at least one positioning pin (13) is respectively inserted into the two ends of the adjusting pipe (1), each positioning pin (13) is movably inserted into the positioning holes (12), and one end of each positioning pin (13) penetrates through the corresponding positioning hole (12) and then extends into the adjusting pipe (1) to limit the sliding of the push plate (32).
2. 2. A concrete filled steel tube sleeper for ballastless tracks according to claim 1, characterized in that the interval between any adjacent two of the positioning holes (12) at each end of the adjusting pipe (1) is 5-10mm.
3. 3. A concrete filled steel tube sleeper for ballastless tracks according to claim 1, characterized in that the stiffness coefficient of the spring (31) is 100000N/m-200000N/m and the material of the spring (31) is 60Si2Mn.
4. 4. A concrete filled steel tube sleeper for ballastless tracks according to any one of claims 1 to 3, characterized in that both end inner circumferential walls of the adjustment tube (1) are respectively provided with an inner flange (14), the inner circumferential wall of the inner flange (14) is slidably fitted with the outer circumferential wall of the corresponding steel tube (21), the other end outer circumferential walls of the corresponding steel tube (21) are respectively provided with an outer flange (211), and the outer circumferential wall of the outer flange (211) is slidably fitted with the inner circumferential wall of the corresponding adjustment tube (1), and each corresponding outer flange (211) is located between two inner flanges (14).
5. 5. A concrete filled steel tube sleeper for ballastless track according to claim 4, characterized in that both ends of the adjusting pipe (1) are respectively provided with a limit joint (15), each limit joint (15) comprises a threaded sleeve (151) and annular protrusions (152), two threaded sleeves (151) are respectively in threaded fit with outer peripheral walls at both ends of the adjusting pipe (1), each annular protrusion (152) is coaxially located at one end of the corresponding threaded sleeve (151) and abuts against an end face of the adjusting pipe (1), each annular protrusion (152) is fixedly connected with the corresponding inner flange (14), the outer peripheral wall of the inner flange (14) is in sliding fit with the inner peripheral wall of the adjusting pipe (1), and the inner peripheral wall of the inner flange (14) is in sliding fit with the outer peripheral wall of the steel pipe (21).
6. 6. A concrete filled steel tube sleeper for ballastless tracks according to claim 5, characterized in that the threaded sleeve (151), the annular projection (152) and the corresponding inner flange (14) are integrally formed.

Description

Steel pipe concrete sleeper for ballastless track Technical Field The invention belongs to the technical field of ballastless tracks, and particularly relates to a concrete filled steel tube sleeper for a ballastless track. Background In railway ballastless track systems, there is a prefabricated sleeper which is installed in the track bed or is cast integrally with the track bed with concrete. At present, the application of the steel pipe concrete sleeper in ballastless tracks is more and more widespread, the steel pipe concrete sleeper is formed by integrally forming steel pipe concrete and a sleeper block, namely, the steel pipe concrete is formed by casting the sleeper block and simultaneously designing the steel pipe concrete to be composed of a plurality of hollow steel pipes, so that the geometric shape and position retaining capacity of the sleeper is effectively improved, the consumption of the steel pipes is reduced, the constructability is improved, the construction can be directly performed on site, and the requirement of the sleeper on bending and twisting resistance is met. However, the concrete filled steel tube sleeper adopts a structural form of fixed track gauge, namely, the intervals of sleeper blocks at two ends are fixed, and when track gauge change is encountered (for example, when track gauge length size is gradually changed gradually when structures such as turnout installation are encountered), the ballastless track cannot meet the field installation requirement. Disclosure of Invention Aiming at the defects or improvement demands of the prior art, the invention provides a concrete filled steel tube sleeper for a ballastless track, which aims to not only finish the preparation of sleeper units by pouring in advance and improve the construction efficiency of the whole ballastless track, but also adjust the track gauges of two steel rails so that the track gauges meet the field installation demands. The invention provides a concrete filled steel tube sleeper for ballastless tracks, which comprises a plurality of adjusting pipes and two sleeper units which are arranged at intervals; Each sleeper unit comprises a plurality of steel pipes and sleeper blocks, for any sleeper unit, the plurality of adjusting pipes correspond to the plurality of steel pipes one by one, one end of each steel pipe is inserted into each sleeper block, concrete filling materials are filled in each steel pipe, and each sleeper block and the corresponding concrete filling materials are integrally cast through concrete; the other ends of the two opposite steel pipes are respectively movably and coaxially inserted into the two ends of the corresponding adjusting pipes so as to adjust the distance between the two sleeper blocks. Optionally, the other end of each steel tube is provided with an external thread, and the inner peripheral walls of the two ends of the adjusting tube are respectively provided with an internal thread, and the internal thread is matched with the external thread. Optionally, locking bolts are respectively inserted at two ends of the adjusting pipe, each locking bolt extends along the radial direction of the adjusting pipe, and each locking bolt abuts against the corresponding steel pipe after penetrating through the pipe wall of the adjusting pipe. Optionally, the steel pipe concrete sleeper further comprises an adjusting piece, the adjusting piece comprises a spring and two pushing plates, the outer peripheral wall of each pushing plate is in sliding fit with the inner peripheral wall of the adjusting pipe, two pushing plates are respectively arranged at two ends of the spring, and the two pushing plates are located between the two steel pipes. Optionally, the two ends of the adjusting tube are respectively provided with a plurality of positioning holes, the positioning holes extend along the axial direction of the adjusting tube, the two ends of the adjusting tube are respectively inserted with at least one positioning pin, each positioning pin is movably inserted into the positioning holes, and one end of each positioning pin penetrates through the corresponding positioning hole and then extends into the adjusting tube so as to limit the sliding of the push plate. Optionally, the interval between any two adjacent positioning holes at each end of the adjusting tube is 5-10mm. Optionally, the stiffness coefficient of the spring is 100000N/m-200000N/m, and the material of the spring is 60Si2Mn. Optionally, the inner peripheral walls at two ends of the adjusting tube are respectively provided with an inner flange, the inner peripheral walls of the inner flanges are in sliding fit with the outer peripheral walls of the corresponding steel tubes, the outer peripheral walls of the other ends of the corresponding steel tubes are respectively provided with an outer flange, the outer peripheral walls of the outer flanges are in sliding fit with the inner peripheral walls of the corresponding adjusti