Pin rod anchoring device and method suitable for multi-layer structure of ballastless track

Abstract

The invention discloses a pin rod anchoring device and method suitable for a multi-layer structure of a ballastless track, and particularly relates to the field of ballastless track vertical reinforcement. The pin rod anchoring device comprises a pin shaft, connecting studs are arranged at the upper end and the lower end of the pin shaft correspondingly, the two connecting studs are in threaded connection with internal thread sleeves correspondingly, each internal thread sleeve is provided with a plurality of anchor holes, and an anchor capable of freely extending out is arranged in each anchor hole; all the ground anchors are jointly provided with a driving assembly, and the driving assembly can enable the ground anchors to stretch out and fix the inner threaded sleeve to the reinforcing position. By the adoption of the technical scheme, the problems that an existing embedded steel bar reinforcing method is low in reinforcing efficiency and difficult to meet the construction requirement of the skylight period are solved, and the reinforcing efficiency and stability are improved.

Description

Technical Field

[0001] The invention relates to the field of vertical reinforcement of ballastless track, and in particular to a pin rod anchoring device and method suitable for a multi-layer structure of ballastless track. Background Art

[0002] With the rapid development of my country's economy, the construction of rail transit infrastructure has also accelerated. Among them, the mileage of high-speed railways has ranked first in the world. Although both ballasted track and ballastless track are the laying methods of high-speed railway track structures, compared with ballasted track, ballastless track structure has been widely used in the construction of high-speed railway track structure due to its excellent performance. Ballastless track structure is a multi-layer composite structure. The joints of different structural layers are prone to separation and even arching under the action of train braking force and temperature load.

[0003] The existing reinforcement measures mainly involve grouting and vertical rebar planting at the gaps. However, after grouting, the problem of bonding failure still occurs easily under the action of external loads. In comparison, the treatment effect of vertical rebar planting is more significant. However, the existing rebar planting treatment method is relatively simple, the material is single, and the interface pull-out performance is weak. The rebar is easy to break under the action of external loads, the reinforcement effect is gradually weakened, and the stability of the track structure is difficult to ensure; if the number of rebars is large, it is easy to destroy the original integrity of the track structure; the reinforcement efficiency is low, and it is difficult to meet the construction requirements during the skylight period.

[0004] How to further anchor and reinforce different structural layers based on the existing rebar treatment, increase the interface bonding performance to resist interface debonding and shearing, increase the life of the rebar, avoid repeated repairs and reinforcements, and enable rapid construction. The difficulty lies in: the rebar itself is a simple material, and what form and method of use is the best. Summary of the invention

[0005] The present invention aims to provide a pin rod anchoring device and method suitable for a ballastless track multi-layer structure, which solves the problem that the existing rebar reinforcement method has low reinforcement efficiency and is difficult to meet the construction requirements during the skylight period.

[0006] In order to achieve the above-mentioned purpose, the technical solution of the present invention is as follows: a pin rod anchoring device suitable for a multi-layer structure of a ballastless track, comprising a pin shaft, wherein connecting studs are provided at both upper and lower ends of the pin shaft, and internal threaded sleeves are respectively threadedly connected to the two connecting studs, and each of the internal threaded sleeves is provided with a plurality of anchor holes, and each of the anchor holes is provided with an anchor that can be freely extended, and all the anchors are provided with a driving assembly, which can extend the anchor and fix the internal threaded sleeve at the reinforcement.

[0007] Furthermore, a square knurling structure is engraved on the surface of the pin shaft.

[0008] Through the above arrangement, the square knurled surface forms relatively regular and obvious edges and corners, which can provide stronger friction and anti-slip effect, which is particularly effective in the case of high friction contact. Therefore, the knurled structure is used to resist the shear resistance of the track structure and increase the bonding ability.

[0009] Furthermore, the anchor is in a conical shape.

[0010] Furthermore, a sealing ring located in the internal threaded sleeve is provided at the end of the anchor, and the size of the sealing ring is larger than the size of the anchor hole.

[0011] Furthermore, the drive assembly includes a compressor, which is connected to a seal through an air intake pipe. Multiple air ducts are longitudinally provided on the side walls of the two internally threaded sleeves and the pin shaft. The number of the air ducts is the same as the number of longitudinally distributed anchor holes, and the air ducts are arranged opposite to the anchor holes. The seal is connected to the air duct of the internally threaded sleeve located on the upper side.

[0012] Furthermore, the sealing member includes a high-pressure gas sealing cover and a porous connector, the high-pressure gas sealing cover is provided with a high-pressure gas port, the high-pressure gas port is connected to the air inlet pipe, the porous connector is threadedly connected to the high-pressure gas sealing cover, a pressurized channel connected to the air duct is provided on the side wall of the porous connector, the number of the pressurized channels is the same as the number of the air ducts, and the porous connector is threadedly connected to the connecting stud.

[0013] Furthermore, the method of using the anchoring device is as follows:

[0014] S1. Drill holes at the reinforcement position of the track structure. The hole diameter is slightly larger than the diameter of the pin shaft. The outer surface of the pin shaft is 1 cm away from the hole wall. Blow air to remove dust at the drilling position.

[0015] S2. Place the pin at the drill hole and adjust the position of the pin so that the pin is at the center of the drill hole and fixed;

[0016] S3, start the compressor, high-pressure gas is ejected from the high-pressure gas port, and acts on the anchor through the air duct and the pressurized channel, and the high-pressure gas gives the anchor a huge pushing pressure, so that the anchor rushes out of the anchor hole, and the end of the anchor is embedded in the track structure;

[0017] S4. After the anchor bolts are embedded in the track structure, the high-pressure gas sealing cover is opened, and high-pressure grouting is performed on the pressurized channel and the gaps in the hole wall, and edge sealing is performed.

[0018] Compared with the prior art, this solution has the following beneficial effects:

[0019] 1. This solution solves the problem of low reinforcement efficiency and difficulty in meeting the construction requirements during the window period of existing rebar reinforcement methods through a multi-layer pin anchor device; it improves the integrity of the interlayer interface of the track structure, extends the service life of the ballastless track structure, and ensures the safety of high-speed train operations, which has important engineering significance.

[0020] 2. This scheme optimizes the existing reinforcement measures, which include simple rebar treatment, single material and weak interface pull-out performance. The rebar is easy to break under external loads, the reinforcement effect is gradually weakened, and the stability of the track structure is difficult to ensure; and the large number of rebars can easily destroy the original integrity of the track structure. Finally, the reinforcement efficiency can be significantly improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a structural schematic diagram of a pin rod anchoring device of a multi-layer structure suitable for ballastless track of the present invention when in use;

[0022] Figure 2 It is a structural schematic diagram of a pin shaft in a pin rod anchoring device adapted to a multi-layer structure of a ballastless track according to the present invention;

[0023] Figure 3 is a schematic structural diagram of the internal threaded sleeve located on the upper side in this embodiment;

[0024] Figure 4 is a schematic structural diagram of the internal threaded sleeve located at the lower side in this embodiment;

[0025] Figure 5 is a schematic diagram of the structure of the anchor in this embodiment;

[0026] Figure 6 Schematic diagram of the structure of the sealing member in this embodiment. DETAILED DESCRIPTION

[0027] The present invention is further described in detail below through specific embodiments:

[0028] The figure marks in the drawings of the specification include: pin 1, knurled structure 2, connecting stud 3, internal threaded sleeve 4, anchor 5, sealing ring 6, compressor 7, mobile vehicle 8, control panel 9, pressure gauge 10, air intake pipe 11, high-pressure gas sealing cover 12, porous connector 13, pressurized channel 14, and vent 15.

[0029] Example

[0030] like Figures 1 to 6As shown, a pin rod anchoring device adapted to a multi-layer structure of a ballastless track includes a pin shaft 1, and a square knurling structure 2 is engraved on the outer surface of the pin shaft 1. After hardening and forming, the roughness of the surface of the structure is greatly increased by the knurling structure 2, and the interface bonding performance is further improved. At the same time, the length of the pin shaft 1 can be replaced according to the needs to adapt to the structural anchoring of different depths. The upper and lower ends of the pin shaft 1 are fixedly connected with connecting studs 3, and the two connecting studs 3 are respectively threaded with internal threaded sleeves 4. Each internal threaded sleeve 4 is provided with a plurality of annular anchor holes distributed longitudinally at intervals, and each anchor hole is slidably connected with an anchor 5 that can be freely extended. In this embodiment, the shape of the anchor 5 is conical, and the end of the anchor 5 is adhered with a sealing ring 6 located in the internal threaded sleeve 4. The size of the sealing ring 6 is larger than the size of the anchor hole, and the sealing ring 6 can be used to achieve the sealing of the anchor hole. All anchors 5 are provided with a driving assembly, which can make the anchor 5 extend and fix the internal threaded sleeve 4 at the reinforcement.

[0031] In this embodiment, the driving assembly includes a compressor 7, and a mobile vehicle 8 is screwed to the compressor 7. With the help of the mobile vehicle 8, the anchoring device can be more convenient and efficient. The compressor 7 is electrically connected to a control panel 9 and a barometer 10 electrically connected to the control panel 9. The compressor 7 is connected to an air intake pipe 11, and the free end of the air intake pipe 11 is connected to a seal. In this embodiment, the seal includes a high-pressure gas sealing cover 12 and a porous connector 13. A high-pressure gas port is provided at the center of the high-pressure gas sealing cover 12, and the high-pressure gas port is connected to the air intake pipe 11. The porous connector 13 is threadedly connected to the high-pressure gas sealing cover 12, and a plurality of pressurized channels 14 connected to the corresponding air ducts 15 are provided on the inner wall of the porous connector 13 in a circumferential direction. The number of pressurized channels 14 is the same as the number of air ducts 15, and the hardened grouting material in the pressurized channels 14 can ensure the stability of the anchor 5 after embedding. The interior of the porous connector 13 is provided with an internal thread threadedly connected to the connecting stud 3. Multiple air passages 15 are longitudinally provided on the side walls of the two internally threaded sleeves 4 and the pin shaft 1. The number of the air passages 15 is the same as the number of the anchor holes longitudinally distributed. The air passages 15 are arranged opposite to the anchor holes. The air passages 15 located on the lower internally threaded sleeve 4 are flush with the lowermost anchor hole. The internally threaded sleeve 4 located on the upper side is also provided with external threads, and the internally threaded sleeve 4 is threadedly connected with the internal threads of the porous connector 13 through the external threads.

[0032] The anchoring device of this embodiment is not easy to be pulled out or broken, which can significantly improve the mechanical properties and service life of the structural reinforcement and greatly reduce the number and frequency of reinforcements.

[0033] The method of using the anchoring device is as follows:

[0034] S1. After installing all the components of the anchoring device, drill holes at the reinforced position of the track structure. The hole diameter is slightly larger than the diameter of the pin 1. The outer surface of the pin 1 is 1 cm away from the hole wall. The drilling position is blown to remove dust.

[0035] S2. Place the pin 1 at the drill hole and adjust the position of the pin 1 so that the pin 1 is at the center of the drill hole and fixed to ensure the anchoring effect.

[0036] S3, start the compressor 7, and wait until the internal pressure value of the compressor 7 reaches the high pressure value, the high pressure gas is ejected from the high pressure gas port, and the high pressure gas acts on the corresponding anchor 5 through the air passage 15 and the pressurized channel 14, and the anchor 5 is given a huge pushing pressure by means of the high pressure gas, so that the end of the anchor 5 rushes out from the anchor hole, and the end position of the anchor 5 outside the internal threaded sleeve 4 is embedded in the track structure. The high pressure gas in this embodiment can ensure that all anchors 5 are fully embedded in the track structure. The sealing ring 6 can minimize the leakage of gas after the high pressure gas is ejected, and ensure that the pressure of the high pressure gas can be such that the anchor 5 located at the bottom can also be embedded in the track structure; at the same time, the conical structure of the anchor 5 can also make the anchor 5 fit the anchor hole as much as possible, reducing the leakage of high pressure gas.

[0037] S4. After the anchor 5 is embedded in the track structure, the high-pressure gas sealing cover 12 is opened, and high-pressure grouting is performed on the pressurized channel 14 and the gap in the hole wall (the grout enters from the gap between the outer surface of the anchor 5 and the anchor hole), and edge sealing is performed to ensure the surface flatness and aesthetics of the track structure. After this operation is completed, when the next position is reinforced, the compressor 7 is moved to the corresponding position by the mobile vehicle 8, and steps S1 to S5 are repeated again to complete the reinforcement work.

[0038] The above are only embodiments of the present invention, and the common knowledge such as the known specific structures and / or characteristics in the scheme are not described in detail here. It should be pointed out that for those skilled in the art, several deformations and improvements can be made without departing from the structure of the present invention, which should also be regarded as the protection scope of the present invention, and these will not affect the effect of the implementation of the present invention and the practicality of the patent. The scope of protection required by this application shall be based on the content of its claims, and the specific implementation methods and other records in the specification can be used to interpret the content of the claims.

Claims

1. A pin rod anchoring device adapted to a multi-layer structure of ballastless track, characterized in that: The invention comprises a pin shaft (1), wherein the upper and lower ends of the pin shaft (1) are both provided with connecting studs (3), two connecting studs (3) are respectively threadedly connected with internal thread sleeves (4), each of the internal thread sleeves (4) is provided with a plurality of anchor holes, each of the anchor holes is provided with an anchor (5) that can be freely extended, and all the anchors (5) are provided with a driving assembly, which can make the anchor (5) extend and fix the internal thread sleeve (4) at the reinforcement position.

2. The pin rod anchoring device for multi-layer structure of ballastless track according to claim 1, characterized in that: The surface of the pin shaft (1) is engraved with a square knurled structure (2).

3. The pin rod anchoring device for multi-layer structure of ballastless track according to claim 1, characterized in that: The anchor (5) is in a conical shape.

4. The pin rod anchoring device for multi-layer structure of ballastless track according to claim 3 is characterized in that: The end of the anchor (5) is provided with a sealing ring (6) located in the internal threaded sleeve (4), and the size of the sealing ring (6) is larger than the size of the anchor hole.

5. A pin rod anchoring device adapted to a ballastless track multi-layer structure according to any one of claims 2 to 4, characterized in that: The drive assembly comprises a compressor (7), the compressor (7) is connected to a seal through an air intake pipe (11), a plurality of air passages (15) are longitudinally arranged on the side walls of the two internally threaded sleeves (4) and the pin shaft (1), the number of the air passages (15) is the same as the number of anchor holes distributed longitudinally, and the air passages (15) are arranged opposite to the anchor holes, and the seal is connected to the air passage (15) of the internally threaded sleeve (4) located on the upper side.

6. The pin rod anchoring device for multi-layer structure of ballastless track according to claim 5, characterized in that: The sealing component comprises a high-pressure gas sealing cover (12) and a porous connector (13); the high-pressure gas sealing cover (12) is provided with a high-pressure gas port, the high-pressure gas port is connected to the air inlet pipe (11); the porous connector (13) is threadedly connected to the high-pressure gas sealing cover (12); a pressurizing channel (14) connected to the air duct (15) is provided on the side wall of the porous connector (13); the number of the pressurizing channels (14) is the same as the number of the air ducts (15); and the porous connector (13) is threadedly connected to the connecting stud (3).

7. The pin rod anchoring device for multi-layer structure of ballastless track according to claim 6, characterized in that: The method of using the anchoring device is as follows: S1. Drill a hole at a reinforced position of the track structure, with the hole diameter slightly larger than the diameter of the pin shaft (1), and the outer surface of the pin shaft (1) is 1 cm away from the hole wall. Blow air to remove dust at the drilling position; S2, place the pin (1) at the drill hole and adjust the position of the pin (1) so that the pin (1) is at the center of the drill hole and fixed; S3, starting the compressor (7), the high-pressure gas is ejected from the high-pressure gas port, and acts on the anchor (5) through the air passage (15) and the pressurized passage (14), and the high-pressure gas is used to give the anchor (5) a huge pushing pressure, so that the anchor (5) is pushed out from the anchor hole, and the end of the anchor (5) is embedded in the track structure; S4. After the anchor bolt (5) is embedded in the track structure, the high-pressure gas sealing cover (12) is opened, and high-pressure grouting is performed on the pressurized channel (14) and the gaps in the hole wall, and edge sealing is performed.

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