Trapezoidal sleeper with auxiliary sleeper and construction method thereof

Abstract

The invention discloses a trapezoidal sleeper with an auxiliary sleeper and a construction method of the trapezoidal sleeper. The trapezoidal sleeper comprises two longitudinal beams, limiting bosses and the auxiliary sleeper, and anti-vibration pads are arranged at the contact positions of the auxiliary sleeper and the longitudinal beams; wherein the auxiliary sleeper is transversely arranged below the two longitudinal beams and is used for supporting the longitudinal beams. According to the trapezoidal sleeper with the auxiliary sleeper and the construction method of the trapezoidal sleeper, the phenomena of'empty hoisting 'and'hard-to-hard' are effectively reduced, the occupied width of a track bed is reduced, the working time of a pouring working face is shortened, and rapid construction of a trapezoidal sleeper track is facilitated.

Description

Technical Field

[0001] The present invention relates to a trapezoidal sleeper with an auxiliary pillow and a construction method thereof, belonging to the technical field of railways. Background Art

[0002] In the construction of traditional trapezoidal sleepers, the rail arrangement needs to be erected above the steel reinforcement cage first, and then the concrete support is poured. In this process, isolation materials and wrapping sleeves are required to isolate the trapezoidal sleeper from the surrounding concrete to prevent the trapezoidal sleeper from adhering to the cast-in-place concrete. However, during the construction process, it is inevitable that the on-site workers' operations are not delicate enough to ensure full compliance with relevant specification requirements. When the wrapping sleeve or isolation material is damaged, missing or not installed properly, it is easy for the trapezoidal sleeper to adhere to the bottom support of the trapezoidal sleeper during the pouring of the bottom support of the trapezoidal sleeper, forming a "hard collision", resulting in the failure of the vibration damping pad to function. On the other hand, in some adverse situations, due to too small concrete slump or large curve exceeding value positions, on-site vibration is not in place, which is likely to cause voids under the vibration damping pad. In addition, the on-site installation of the wrapping sleeve will also increase the laying cost.

[0003] Therefore, it is necessary to conduct in-depth research on the existing trapezoidal sleepers and their construction methods to solve the above problems. Summary of the Invention

[0004] In order to overcome the above problems, in-depth research has been carried out to design a trapezoidal sleeper with an auxiliary pillow. The trapezoidal sleeper includes two longitudinal beams 1, a limit boss 2 and an auxiliary pillow 3, and a vibration damping pad 4 is arranged at the contact position between the auxiliary pillow 3 and the longitudinal beam 1;

[0005] Among them, the auxiliary pillow 3 is horizontally arranged below the two longitudinal beams 1 and is used to support the longitudinal beams 1.

[0006] In a preferred embodiment, the auxiliary pillow 3 is integrally cast with the roadbed, and the top of the auxiliary pillow 3 is higher than the top of the roadbed.

[0007] In a preferred embodiment, the limit boss 2 is arranged inside the two longitudinal beams 1.

[0008] In a preferred embodiment, the auxiliary pillow 3 is a concrete structure, and truss steel bars are arranged inside it.

[0009] In a preferred embodiment, bolt holes 301 are arranged on the auxiliary pillow 3 for connecting the limit boss or temporarily fixing the auxiliary pillow to facilitate the pouring of the roadbed.

[0010] In a preferred embodiment, the auxiliary pillow 3 includes a first auxiliary pillow 31 and a second auxiliary pillow 32. The first auxiliary pillow 31 is arranged at the end of the longitudinal beam, and the second auxiliary pillow 32 is arranged in the middle of the longitudinal beam. The limit boss 2 is arranged at the corresponding position of the second auxiliary pillow 32.

[0011] In a preferred embodiment, a steel bar 302 extending downward is provided at the lower end of the auxiliary pillow 3.

[0012] In a preferred embodiment, the trapezoidal sleeper further has a support 5 for fixing the limit boss on the second auxiliary pillow 32. One end of the support 5 is fixedly connected to the limit boss 2, and the other end is fixedly connected to the second auxiliary pillow 32.

[0013] In a preferred embodiment, the transverse length of the second auxiliary pillow 32 is greater than the distance between the two longitudinal beams, so that the limit bosses at corresponding positions on the two longitudinal beams can be fixed on the same second auxiliary pillow 32.

[0014] In a preferred embodiment, a stop 311 is provided at one end of the second auxiliary pillow 32. The transverse length of the second auxiliary pillow 32 is greater than the transverse length of a single longitudinal beam. Each second auxiliary pillow 32 is arranged at the lower end of a single longitudinal beam, so that the second auxiliary pillow 32 can support the longitudinal beam, and the stop 311 can abut against the limit boss 2.

[0015] The present invention also provides a construction method for a trapezoidal sleeper, which is carried out by using the above-mentioned trapezoidal sleeper and includes:

[0016] S1. Suspending the longitudinal beam, installing the auxiliary pillow at the lower end of the longitudinal beam, and arranging a vibration damping pad at the contact position between the longitudinal beam and the auxiliary pillow;

[0017] S2. Wrapping isolation materials at the positions on the longitudinal beam where the vibration damping pads are not arranged;

[0018] S3. Lowering the longitudinal beam, assembling the track panel, and tying the bed steel bars;

[0019] S4. Pouring the bed concrete.

[0020] The beneficial effects of the present invention include:

[0021] 1. The vibration damping pads of the trapezoidal sleeper are closely attached to the auxiliary pillow throughout the construction process, avoiding the problem of "hanging in the air". The top surface of the auxiliary pillow concrete block is higher than the bottom bed, increasing the space under the pillow and making it less likely to cause concrete adhesion, effectively reducing the occurrence of the phenomenon of "hard hitting hard";

[0022] 2. Reducing the occupied width of the bed;

[0023] 3. Reducing the amount of concrete used;

[0024] 4. Reducing the dependence on the wrapping sleeve. There is no need to set a concrete retaining wall outside the longitudinal beam of the longitudinal sleeper, which is convenient for the inspection, maintenance and replacement of the vibration damping elements;

[0025] 5. Reducing the working time at the pouring operation surface, which is beneficial to the rapid construction of the trapezoidal sleeper track. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 A schematic top view of a trapezoidal sleeper with an auxiliary pillow according to a preferred embodiment of the present invention is shown;

[0027] Figure 2 A schematic diagram of partial hanging of a traditional trapezoidal sleeper is shown;

[0028] Figure 3 A schematic diagram of full hanging of a traditional trapezoidal sleeper is shown;

[0029] Figure 4 A schematic diagram of hard contact at the end of a traditional trapezoidal sleeper is shown;

[0030] Figure 5 A schematic diagram of hard contact at the bottom of a traditional trapezoidal sleeper is shown;

[0031] Figure 6 A schematic top view of a traditional trapezoidal sleeper is shown;

[0032] Figure 7 A schematic diagram of the auxiliary pillow structure in a trapezoidal sleeper with an auxiliary pillow according to a preferred embodiment of the present invention is shown;

[0033] Figure 8 A schematic diagram of the connection between the second auxiliary pillow and the longitudinal beam in a trapezoidal sleeper with an auxiliary pillow according to a preferred embodiment of the present invention is shown;

[0034] Figure 9 A schematic diagram of the connection between the support, the second auxiliary pillow and the longitudinal beam in a trapezoidal sleeper with an auxiliary pillow according to a preferred embodiment of the present invention is shown;

[0035] Figure 10 A schematic diagram of the second auxiliary pillow structure in a trapezoidal sleeper with an auxiliary pillow according to a preferred embodiment of the present invention is shown;

[0036] Figure 11 A schematic diagram of the connection between the second auxiliary pillow and the longitudinal beam in a trapezoidal sleeper with an auxiliary pillow according to a preferred embodiment of the present invention is shown;

[0037] Figure 12 A schematic diagram of the structure of the buffer pad between the retaining block and the longitudinal beam in a trapezoidal sleeper with an auxiliary pillow according to a preferred embodiment of the present invention is shown;

[0038] Figure 13 A schematic diagram of installing an auxiliary pillow in the construction method of a trapezoidal sleeper with an auxiliary pillow according to a preferred embodiment of the present invention is shown;

[0039] Figure 14Schematic diagram of installing an auxiliary sleeper in the construction method of a trapezoidal sleeper with an auxiliary sleeper according to a preferred embodiment of the present invention.

[0040] Description of the reference numerals in the attached drawings:

[0041] 1 - Longitudinal beam

[0042] 2 - Limit boss

[0043] 3 - Auxiliary sleeper

[0044] 4 - Vibration damping pad

[0045] 5 - Support

[0046] 6 - Temporary angle steel

[0047] 7 - Connecting steel pipe

[0048] 31 - First auxiliary sleeper

[0049] 32 - Second auxiliary sleeper

[0050] 301 - Bolt hole

[0051] 302 - Reinforcement bars under the auxiliary sleeper

[0052] 311 - Retaining platform

[0053] 312 - Transverse buffer pad

[0054] 313 - Longitudinal buffer pad

[0055] 91 - Ballast bed

[0056] 92 - Partial suspension

[0057] 93 - Full suspension

[0058] 94 - Exposed concrete Detailed implementation manners

[0059] The present invention will be further described in detail below with reference to the drawings and embodiments. Through these descriptions, the features and advantages of the present invention will become more clear and definite.

[0060] The special term "exemplary" here means "serving as an example, embodiment or illustration". Any embodiment described as "exemplary" here does not necessarily have to be construed as superior to or better than other embodiments. Although various aspects of the embodiments are shown in the drawings, the drawings do not have to be drawn to scale unless otherwise specified.

[0061] The trapezoidal sleeper with an auxiliary sleeper provided according to the present invention, as Figure 1 , Figures 7 - 14As shown, it includes two longitudinal beams 1, a limit boss 2 and an auxiliary sleeper 3, and a vibration damping pad 4 is arranged at the contact position between the auxiliary sleeper 3 and the longitudinal beam 1.

[0062] The auxiliary sleeper 3 is horizontally arranged below the two longitudinal beams 1 and is used to support the longitudinal beam 1. Preferably, the auxiliary sleeper 3 has a square structure.

[0063] For traditional trapezoidal sleepers, quality problems such as "hanging in the air" and "hard contact" are likely to occur during the construction of the ballast bed. "Hanging in the air" means that the vibration damping pad of the trapezoidal sleeper cannot be fully in contact with the concrete ballast bed, and there is a hanging-in-the-air part, which affects the conduction of the upper load of the trapezoidal sleeper track. As Figure 2 、 3 shown, where Figure 2 is a schematic diagram of partial hanging in the air. There is a partial hanging in the air 92 between the vibration damping pad 4 and the ballast bed 91. Figure 3 is a schematic diagram of full hanging in the air. A full hanging in the air 93 appears between the vibration damping pad 4 and the ballast bed 91. The hanging-in-the-air phenomenon is caused by reasons such as poor fluidity of the concrete, insufficient vibration, and loose binding of the wrapping sleeve, resulting in an uncontacted area between the vibration damping pad of the trapezoidal sleeper and the bottom ballast bed, and it is particularly likely to occur at locations with a large superelevation on small-radius curves. "Hard contact" means that the concrete part of the trapezoidal sleeper directly contacts the ballast bed, affecting the vibration damping effect of the trapezoidal sleeper. As Figure 4 、 5 shown, where Figure 4 is a schematic diagram of hard contact at the end of the sleeper. The exposed concrete 94 of the trapezoidal sleeper directly contacts the ballast bed 91 and the trapezoidal sleeper, resulting in a poor vibration damping effect of the vibration damping pad 4. Figure 5 is a schematic diagram of hard contact at the bottom of the sleeper. The exposed concrete 94 of the trapezoidal sleeper directly contacts the ballast bed 91, resulting in a poor vibration damping effect of the vibration damping pad 4. The reason for the "hard contact" problem is mainly that the packaging of the isolation material does not meet the requirements or is damaged during the construction process, resulting in the adhesion of the concrete to the main part of the trapezoidal sleeper during the pouring of the ballast bed, thereby weakening the vibration damping effect of the trapezoidal sleeper track.

[0064] According to the present invention, during construction, the auxiliary sleeper 3 is cast integrally with the ballast bed. By setting the auxiliary sleeper to replace the direct contact between the upper surface of the traditional cast ballast bed and the vibration damping pad, since the auxiliary sleeper is prefabricated, there is no problem of uneven upper surface, and it can be fully in contact with the vibration damping pad, thus eliminating the hanging-in-the-air problem.

[0065] Further preferably, the top of the auxiliary sleeper 3 is higher than the top of the ballast bed.

[0066] The above setting makes the space between the cast-in-place concrete and the trapezoidal sleeper larger than that of the traditional trapezoidal sleeper, thereby avoiding the adhesion of the concrete to the main part of the trapezoidal sleeper during the pouring of the ballast bed and eliminating the generation of the "hard contact" problem.

[0067] The limiting boss is used to limit the longitudinal movement of the trapezoidal sleeper. In the traditional installation of the trapezoidal sleeper, since the longitudinal beam 1 needs to be fixed before pouring the roadbed, the limiting boss can only be arranged on the outer sides of the two longitudinal beams, as Figure 6 shown, which results in a wider roadbed width. Correspondingly, the cross-section of the traditional trapezoidal sleeper roadbed is designed as an L shape, that is, discontinuous protrusions are arranged on the outer sides of the longitudinal beams to fix the limiting boss.

[0068] According to a preferred embodiment of the present invention, the limiting boss 2 is arranged on the inner sides of the two longitudinal beams 1.

[0069] In the present invention, based on the provided auxiliary sleeper, the limiting boss can be arranged on the inner side of the longitudinal beam and fixed on the auxiliary sleeper, thereby reducing the occupied width of the roadbed. At the same time, the cross-section of the roadbed does not need to be designed as an L shape and only needs to be designed as a plane, reducing the amount of roadbed concrete used.

[0070] Preferably, there are 6 - 10 limiting bosses 2, for example, 8. Since the limiting boss is adjusted from the outer side of the longitudinal beam to the inner side of the longitudinal beam, the volume of a single limiting boss is reduced. By increasing the number of limiting bosses, the fixing stability is ensured.

[0071] In a preferred embodiment, the auxiliary sleeper 3 is of a concrete structure, and truss steel bars are arranged inside it to improve the support strength of the auxiliary sleeper.

[0072] Further preferably, bolt holes 301 are arranged on the auxiliary sleeper 3 for connecting the limiting boss or temporarily fixing the auxiliary sleeper to facilitate the pouring of the roadbed.

[0073] In a preferred embodiment, the auxiliary sleeper 3 includes a first auxiliary sleeper 31 and a second auxiliary sleeper 32. The first auxiliary sleeper 31 is arranged at the end of the longitudinal beam, and the second auxiliary sleeper 32 is arranged in the middle of the longitudinal beam. The limiting boss 2 is arranged at the corresponding position of the second auxiliary sleeper 32 to facilitate fixing the limiting boss 2 to the second auxiliary sleeper 32, thereby realizing the fixing of the longitudinal beam 1.

[0074] In a preferred embodiment, reinforcing bars 302 extending downward are arranged at the lower end of the auxiliary sleeper 3 to improve the connection strength between the auxiliary sleeper 3 and the roadbed. More preferably, the reinforcing bars 302 are of a steel structure, such as angle steel, as Figure 7 shown.

[0075] More preferably, there are multiple reinforcing bars 302, and angles are formed between the multiple reinforcing bars to further improve the connection strength.

[0076] In an embodiment, as Figure 8As shown, the transverse length of the second auxiliary pillow 32 is greater than the distance between the two longitudinal beams, so that the limiting bosses at corresponding positions on the two longitudinal beams can be fixed on the same second auxiliary pillow 32, thereby realizing the transverse limitation of the two longitudinal beams.

[0077] More preferably, the trapezoidal sleeper further has a support 5 for fixing the limiting boss on the second auxiliary pillow 32. One end of the support 5 is fixedly connected to the limiting boss 2, and the other end is fixedly connected to the second auxiliary pillow 32. The setting of the support 5 provides a tolerance for installation, avoiding the misalignment of the reserved installation holes between the limiting boss 2 and the second auxiliary pillow 32. At the same time, the connection strength between the limiting boss 2 and the second auxiliary pillow 32 is improved.

[0078] More preferably, one end of the support 5 is bolted to the second auxiliary pillow 32, and the other end is wrapped around the limiting boss 2 to achieve a fixed connection, as Figure 9 shown.

[0079] Preferably, the support 5 is a cast iron support.

[0080] In another embodiment, there are multiple second auxiliary pillows 32, and a stop 311 is provided at one end of the second auxiliary pillow 32, as Figure 10 shown. The transverse length of the second auxiliary pillow 32 is greater than the transverse length of a single longitudinal beam. Each second auxiliary pillow 32 is arranged at the lower end of a single longitudinal beam, so that the second auxiliary pillow 32 can support the longitudinal beam, and the stop 311 can abut against the limiting boss 2, thereby realizing the fixed connection between the limiting boss and the second auxiliary pillow 32, as Figure 11 shown.

[0081] More preferably, a screw hole is provided on the stop 311, and a screw hole is provided at the corresponding position on the limiting boss 2. The stop 311 and the limiting boss 2 are fixedly connected by bolts.

[0082] Preferably, as Figure 12 shown, there is also a transverse buffer pad 312 between the stop 311 and the longitudinal beam, and a longitudinal buffer pad 313 is also provided between the stop 311 and the limiting boss 2. More preferably, holes are provided in the centers of the transverse buffer pad 312 and the longitudinal buffer pad 313 for the fixation of temporary tooling, ensuring the close fit of the buffer pads and the limiting boss.

[0083] Preferably, a vertical embedded sleeve is provided at each end of the second auxiliary pillow 32 for its temporary assembly and fixation.

[0084] In the present invention, the setting method of the screw holes is not limited. For example, the screw holes can be set by means of embedded sleeves.

[0085] Preferably, similar to the traditional trapezoidal sleeper, a connecting steel pipe 7 is also arranged between the two longitudinal beams.

[0086] The present invention also discloses a construction method for trapezoidal sleepers, which is carried out by using the above trapezoidal sleepers and includes:

[0087] S1. Suspending the longitudinal beams, installing auxiliary sleepers at the lower ends of the longitudinal beams, and arranging vibration damping pads at the contact positions between the longitudinal beams and the auxiliary sleepers;

[0088] S2. Wrapping isolation materials at the positions on the longitudinal beams where the vibration damping pads are not arranged;

[0089] S3. Lowering the longitudinal beams, assembling the track panel, and tying the reinforcement bars of the roadbed;

[0090] S4. Pouring the concrete of the roadbed.

[0091] In S1, the specific method for suspending the longitudinal beams is not limited, and those skilled in the art can freely set it according to actual needs. For example, a crane can be used for suspension, or the method of using a stool support in the construction of conventional trapezoidal sleepers can be adopted.

[0092] Different from the installation of traditional trapezoidal sleepers, auxiliary sleepers need to be installed after suspending the longitudinal beams.

[0093] Preferably, when the transverse length of the second auxiliary sleeper is greater than the distance between the two longitudinal beams, a temporary angle steel 6 is set. The temporary angle steel 6 is placed at the upper end of the longitudinal beam, and the second auxiliary sleeper is placed at the lower end of the longitudinal beam. The temporary angle steel and the second auxiliary sleeper are connected by bolts to realize the relative fixation between the second auxiliary sleeper and the longitudinal beam; a support is installed on the second auxiliary sleeper by bolts, and the support is wrapped on the limit boss, as Figure 13 shown.

[0094] Preferably, when there is a retaining platform on the second auxiliary sleeper, the retaining platform and the limit boss are fixedly connected by bolts. Preferably, a temporary angle steel is placed at the upper end of the longitudinal beam, the second auxiliary sleeper is placed at the lower end of the longitudinal beam, and the temporary angle steel and the second auxiliary sleeper are connected by bolts to realize the relative fixation between the second auxiliary sleeper and the longitudinal beam, as Figure 14 shown.

[0095] In the present invention, preferably, the installation method of the first auxiliary sleeper is similar to that of the second auxiliary sleeper, that is, a temporary angle steel 6 is set at the upper end of the longitudinal beam, the first auxiliary sleeper is placed at the lower end of the longitudinal beam, and the temporary angle steel and the first auxiliary sleeper are connected by bolts.

[0096] In S2, different from the construction method of traditional trapezoidal sleepers, during the process of wrapping isolation materials on the longitudinal beams, there is no need to wrap with a sleeve. This is because the auxiliary sleepers are provided, which increases the distance between the longitudinal beams and the concrete poured for the roadbed, greatly reducing the probability of hard contact between the roadbed and the longitudinal beams.

[0097] In the construction method of trapezoidal sleepers, the isolation material is generally pearl cotton. In the traditional construction method, limited by the distance between the longitudinal beam and the cast concrete of the ballast bed, in the existing standard construction method, the thickness of the pearl cotton is set to 25 mm. Preferably, in the present invention, the thickness of the pearl cotton is set to 50 mm, thereby further reducing the probability of hard-on-hard problems.

[0098] In the present invention, the process of step S3 is the same as the conventional trapezoidal sleeper construction method, and will not be described in detail here.

[0099] In S4, unlike the traditional construction in which the roadbed section is cast into an L-shape, in the present invention, it only needs to be cast into a flat surface, which reduces the amount of roadbed concrete and the casting time.

[0100] Further, after the poured concrete solidifies, the temporary angle steel is removed.

[0101] In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "front", "rear", etc. indicate positions or positional relationships based on the working state of the present invention, 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 orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", "third", and "fourth" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0102] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected" and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0103] The present invention has been described above in conjunction with preferred embodiments, but these embodiments are only exemplary and serve only as an illustration. On this basis, the present invention may be subjected to a variety of substitutions and improvements, all of which fall within the scope of protection of the present invention.

Claims

1. A trapezoidal sleeper with an auxiliary pillow, characterized in that, The trapezoidal sleeper comprises two longitudinal beams (1), limiting bosses (2) and auxiliary sleepers (3), and damping pads (4) are arranged at the contact positions between the auxiliary sleepers (3) and the longitudinal beams (1); Wherein, the auxiliary sleepers (3) are transversely arranged below the two longitudinal beams (1) and are used for supporting the longitudinal beams (1); The limiting bosses (2) are arranged on the inner sides of the two longitudinal beams (1).

2. The trapezoidal sleeper with auxiliary sleepers according to claim 1, characterized in that The auxiliary sleepers (3) are integrally cast with the roadbed, and the tops of the auxiliary sleepers (3) are higher than the top of the roadbed.

3. The trapezoidal sleeper with auxiliary sleepers according to claim 1, characterized in that The auxiliary sleepers (3) are of a concrete structure, and truss steel bars are arranged inside.

4. The trapezoidal sleeper with auxiliary sleepers according to claim 1, characterized in that Bolt holes (301) are arranged on the auxiliary sleepers (3) for connecting the limiting bosses or temporarily fixing the auxiliary sleepers to facilitate the casting of the roadbed.

5. The trapezoidal sleeper with auxiliary sleepers according to claim 1, characterized in that The auxiliary sleepers (3) include a first auxiliary sleeper (31) and a second auxiliary sleeper (32). The first auxiliary sleeper (31) is arranged at the end of the longitudinal beam, the second auxiliary sleeper (32) is arranged in the middle of the longitudinal beam, and the limiting bosses (2) are arranged at the corresponding positions of the second auxiliary sleeper (32).

6. The trapezoidal sleeper with auxiliary sleepers according to claim 1, characterized in that Steel bars (302) extending downward are arranged at the lower ends of the auxiliary sleepers (3).

7. The trapezoidal sleeper with auxiliary sleepers according to claim 1, characterized in that The trapezoidal sleeper further has a support (5) for fixing the limiting bosses on the second auxiliary sleeper (32). One end of the support (5) is fixedly connected to the limiting boss (2), and the other end is fixedly connected to the second auxiliary sleeper (32).

8. The trapezoidal sleeper with auxiliary sleepers according to any one of claims 1-7, characterized in that The transverse length of the second auxiliary sleeper (32) is greater than the distance between the two longitudinal beams, so that the limiting bosses at the corresponding positions on the two longitudinal beams can be fixed on the same second auxiliary sleeper (32).

9. The trapezoidal sleeper with auxiliary sleepers according to any one of claims 1-7, characterized in that A retaining platform (311) is arranged at one end of the second auxiliary sleeper (32). The transverse length of the second auxiliary sleeper (32) is greater than the transverse length of a single longitudinal beam. Each second auxiliary sleeper (32) is arranged at the lower end of a single longitudinal beam, so that the second auxiliary sleeper (32) can support the longitudinal beam, and the retaining platform (311) can abut against the limiting boss (2).

10. A construction method for trapezoidal sleepers, which is carried out by using the trapezoidal sleeper as described in any one of claims 1-9, characterized in that, Including: S1. Suspending the longitudinal beam, installing auxiliary sleepers at the lower end of the longitudinal beam, and arranging damping pads at the contact positions between the longitudinal beam and the auxiliary sleepers; S2. Wrapping isolation materials at the positions where no damping pads are arranged on the longitudinal beam; S3. Lowering the longitudinal beam, assembling the track panel, and tying the steel bars of the roadbed; S4. Pouring the concrete of the roadbed.

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