Floating ballast with easy-to-maintain center-mounted shear hinge

Abstract

The present invention belongs to the field of railway track bed, and discloses a floating track bed provided with an easy-to-maintain center-mounted shear hinge, which includes a floating plate and an elastic vibration isolation device, the floating plate is elastically supported by the elastic vibration isolation device, and adjacent floating plates are connected by a center-mounted shear hinge structure, the center-mounted shear hinge structure includes a shear-resistant load-bearing member, assembly grooves are respectively arranged on both sides of the end of the floating plate, and the assembly grooves are arranged in the middle of the thickness direction of the floating plate body, and the two ends of the shear-resistant load-bearing member are respectively embedded in the assembly grooves correspondingly arranged on the adjacent floating plates, so as to connect the adjacent floating plates together. The floating track bed provided with an easy-to-maintain center-mounted shear hinge of the present invention has high construction efficiency, and the center-mounted shear hinge structure is convenient for later maintenance. The floating plate in the floating track bed structure is subjected to more reasonable force and has a longer service life, and can be widely used in various rail transit forms such as subways, urban railways, elevated light rails, and high-speed railways.

Description

Technical Field

[0001] The present invention relates to a railway track bed, and in particular to a railway track structure, which may specifically be a track bed of a railway, a subway, an urban railway, an elevated light rail, a high-speed railway, or the like. Background Art

[0002] With the development of society and the progress of science and technology, the importance of rail transit is becoming increasingly prominent. In the construction of rail transit, the vibration and noise problems generated by vehicle operation must be solved, otherwise it will seriously affect the quality of life of surrounding residents and endanger the safety of surrounding buildings. At the same time, the stability, safety and service life of the rail transit itself will also be affected.

[0003] A large number of engineering practices in the field of rail transit have proved that floating slab track bed technology is one of the most effective track vibration and noise reduction technologies available, especially in subways and urban light rails, where this technology has been widely used. In the existing floating track bed structure, the shear hinge is an important component of the structure that transmits shear force between adjacent floating slabs. It can share the shear force borne by the rails when crossing the slab seams, so that the slabs deform in a coordinated manner. At present, the floating slab shear hinges widely used at home and abroad are divided into two types: central type and upper type. The central type shear hinge currently used includes a shear core rod and a guide contact sleeve. When in use, the central type shear hinge is located in the center of the slab section. The shear core rod and the guide contact sleeve are respectively fixed in the adjacent floating slabs, and one end of the shear core rod is inserted into the guide contact sleeve. This type of shear hinge has low cost. During construction, the shear hinge is first tied together with the steel frame of the floating slab, and then fixedly connected to the floating slab after pouring concrete. The force is reasonable and no additional fixed structure is required. However, this type of shear hinge cannot be replaced after the concrete is poured. After the line is put into operation, it is difficult to observe the working condition, damage and corrosion of the material from above the floating slab, making maintenance and replacement very difficult. Although the top-mounted shear hinge can be installed on the surface of the floating slab, it is convenient for construction and easy to adjust and replace, but because a special fixing device is required, the structure is more complicated and the cost is higher. In addition, it is easy to cause damage to the concrete structure of the relevant connection parts of the floating slab during use.

[0004] In summary, the market urgently needs a new floating slab track bed, which can not only easily achieve reliable connection with adjacent floating slabs, smoothly transmit shear force and improve the stress of the floating slab body, but also is easy to maintain and replace shear-resistant components. Summary of the invention

[0005] The object of the present invention is to solve the above-mentioned problem and to provide a floating ballast with a centrally mounted shear hinge structure and in which the shear-resistant components are easy to repair and replace and which is easy to maintain.

[0006] The floating ballast provided with an easy-to-maintain center-mounted shear hinge of the present invention is realized as follows: the floating ballast comprises a floating plate and an elastic vibration isolation device, the floating plate is elastically supported by the elastic vibration isolation device, adjacent floating plates are connected via a center-mounted shear hinge structure, the center-mounted shear hinge structure comprises a shear bearing member, both sides of the end of the floating plate are respectively provided with assembly grooves, and the assembly grooves are arranged in the middle of the thickness direction of the floating plate body, the two ends of the shear bearing member are respectively embedded in the assembly grooves correspondingly arranged on the adjacent floating plates, and the adjacent floating plates are connected together, the floating plates are further provided with installation channels corresponding to the assembly grooves, the assembly grooves are respectively provided with open openings corresponding to the installation channels and the end faces of the floating plates, a locking device, a limiting boss and an anchoring connector are arranged at the opening of the assembly groove at the bottom of the installation channel, the limiting boss and the anchoring connector are integrated with the floating plate, the locking device comprises a wedge block and a locking member, the wedge block is located between the limiting boss and the shear bearing member, and the wedge block is fixed to the floating plate by the cooperation of the locking member and the anchoring connector.

[0007] Preferably, the cross-sectional profile of the assembly groove is wedge-shaped with a large opening and a small interior. Correspondingly, the cross-sectional profile of the shear-resistant load-bearing member is wedge-shaped corresponding to the cross-sectional profile of the assembly groove.

[0008] In the floating ballast provided with an easy-to-maintain center-mounted shear hinge of the present invention, the structure of the shear bearing member can be various, for example, the shear bearing member can be made of metal materials such as round steel bars, square steel bars, round steel pipes, square steel pipes, channel steels, I-beams, etc.; in addition, the shear bearing member can also be composed of a shear core rod made of metal material and an elastic material layer arranged on its surface. The elastic material layer can specifically be composed of elastic materials such as rubber materials and elastic polyurethane materials. By adding the elastic material layer, the tightness of the fit between the shear bearing member and the assembly groove can be effectively improved, and the collision noise generated when there is a fit gap between the two can be prevented. At the same time, the accidental damage to the floating plate body structure caused by direct contact and collision between the shear bearing member and the assembly groove during use can be avoided, which is beneficial to improving the service life of the floating plate. In addition, two or more shear bearing members can be arranged in one assembly groove. By using multiple shear bearing members to work together, the size of the assembly groove and a single shear bearing member can be reduced, avoiding or greatly reducing the adverse effect of the large space occupied by the assembly groove on the local strength of the floating slab body, which is conducive to facilitating the unified reinforcement of the floating slab and improving the service life. In addition, in order to prevent the assembly groove and the shear bearing member from directly contacting and colliding with each other during the assembly process or use, causing accidental damage to the floating slab body structure, a reinforcement frame can also be arranged on the side wall of the assembly groove, and the reinforcement frame is pre-cast into one piece with the floating slab.

[0009] Compared with the prior art, the floating ballast provided with an easy-to-maintain central shear hinge has the following advantages:

[0010] (1) The shear bearing member is arranged in the middle of the end of the floating slab, which can not only conveniently realize reliable connection with the adjacent floating slabs and smoothly transmit the shear force, but also effectively improve the stress of the floating slab body during operation, which is beneficial to prolonging the service life of the floating slab;

[0011] (2) The shear bearing member can be conveniently installed into or removed from the assembly groove from the side of the floating plate through the installation channel on the floating plate. Therefore, the maintenance and replacement of the shear bearing member is very fast and convenient, which solves the industry problem that the central shear hinge cannot be replaced in the traditional technology;

[0012] (3) In the central shear hinge structure adopted by the present invention, the assembly groove occupies a small space inside the floating plate. In particular, when two or more shear bearing members are arranged in the assembly groove, the vertical or horizontal reinforcement of the floating plate is basically not affected. Therefore, the influence on the strength of the floating plate body is very small, which is conducive to improving the service life of the floating plate.

[0013] (4) Due to the provision of a special installation channel, when installing and removing the shear bearing parts from the assembly groove, it is not necessary to occupy the space outside the floating plate. Less space is occupied during operation, the space utilization rate is higher, the system structure is more compact, and the practicality of the system is effectively improved.

[0014] In summary, the present invention is provided with a floating ballast bed with an easy-to-maintain center-mounted shear hinge, with high construction efficiency. The center-mounted shear hinge structure is convenient for later maintenance, the floating plate in the floating ballast bed structure is more reasonably stressed, and has a longer service life. It can be widely used in various rail transit forms such as subways, urban railways, elevated light rails, and high-speed railways. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is one of the structural schematic diagrams of the floating ballast bed provided with an easy-to-maintain centrally located shear hinge according to the present invention.

[0016] Figure 2 for Figure 1 AA section view.

[0017] Figure 3 This is the second structural schematic diagram of the floating ballast bed provided with an easy-to-maintain center-mounted shear hinge according to the present invention.

[0018] Figure 4 for Figure 3 DD section view.

[0019] Figure 5 This is the third structural schematic diagram of the floating ballast bed provided with an easy-to-maintain center-mounted shear hinge according to the present invention. DETAILED DESCRIPTION

[0020] Embodiment 1

[0021] like Figure 1 and Figure 2 The present invention is provided with a floating ballast with an easy-to-maintain center-mounted shear hinge, including a floating plate 1 and an elastic vibration isolation device 2. The elastic vibration isolation device 2 is arranged in a built-in structure in the floating ballast. The floating plate 1 is elastically supported by the elastic vibration isolation device 2 and is separated from the surface of the foundation 11. Adjacent floating plates 1 are connected by a center-mounted shear hinge structure. The center-mounted shear hinge structure includes a shear bearing member 3. Specifically, the shear bearing member 3 is a round steel bar. Both sides of the end of the floating plate 1 are respectively provided with assembly grooves 4, and the assembly grooves 4 are arranged in the middle of the thickness direction of the floating plate 1. The two ends of the shear bearing member 3 are respectively embedded in the corresponding assembly grooves 4 on the adjacent floating plates 1. The adjacent floating plates 1 are connected. Connected together, a mounting channel 8 is also provided at the side C of the notch 12 on the floating plate 1 corresponding to the assembly groove 4, and open openings are respectively provided at the assembly groove 4 corresponding to the mounting channel 8 and the end surface B of the floating plate, and a locking device, a limiting boss 6 and an anchoring connector 7 are provided at the opening of the mounting groove 4 at the bottom of the mounting channel 8. The limiting boss 6 and the anchoring connector 7 are integrated with the floating plate 1, and the locking device includes a wedge block 5 and a locking member 9. The locking member 9 is specifically a bolt, and a screw hole is provided on the corresponding anchoring connector 7. The wedge block 5 is located between the limiting boss 6 and the shear bearing member 3, and the wedge block 5 is fixed to the floating plate 1 by cooperating with the screw hole on the locking member 9 and the anchoring connector 7.

[0022] When in use, the floating plate is first raised and leveled, and then the shear bearing member 3 is placed into the assembly groove 4 from the opening of the assembly groove 4 corresponding to the installation channel 8 through the installation channel 8 set on the adjacent floating plate, and then the wedge block 5 is placed and the locking member 9 is used to cooperate with the anchor connector 7 to fix the wedge block 5 on the floating plate 1, and the shear bearing member 3 is locked in the assembly groove 4 by the wedge block 5. In this way, during operation, the shear force can be smoothly transmitted between adjacent floating plates 1 through the shear bearing member 3 during the passage of the rail vehicle.

[0023] Compared with the prior art, the floating ballast provided with an easy-to-maintain central shear hinge has the following advantages:

[0024] (1) The shear bearing member is arranged in the middle of the end of the floating slab, which can not only conveniently realize reliable connection with the adjacent floating slabs and smoothly transmit the shear force, but also effectively improve the stress of the floating slab body during operation, which is beneficial to prolonging the service life of the floating slab;

[0025] (2) The shear bearing member can be conveniently installed into or removed from the assembly groove from the side of the floating plate through the installation channel on the floating plate. Therefore, the maintenance and replacement of the shear bearing member is very fast and convenient, which solves the industry problem that the central shear hinge cannot be replaced in the traditional technology;

[0026] (3) In the central shear hinge structure adopted by the present invention, the assembly groove occupies a small space inside the floating plate. In particular, when two or more shear bearing members are arranged in the assembly groove, the vertical or horizontal reinforcement of the floating plate is basically not affected. Therefore, the influence on the strength of the floating plate body is very small, which is conducive to improving the service life of the floating plate.

[0027] (4) Due to the provision of a special installation channel, when installing and removing the shear bearing parts from the assembly groove, it is not necessary to occupy the space outside the floating plate. Less space is occupied during operation, the space utilization rate is higher, the system structure is more compact, and the practicality of the system is effectively improved.

[0028] In summary, the present invention is provided with a floating ballast bed with an easy-to-maintain center-mounted shear hinge, with high construction efficiency. The center-mounted shear hinge structure is convenient for later maintenance, the floating plate in the floating ballast bed structure is more reasonably stressed, and has a longer service life. It can be widely used in various rail transit forms such as subways, urban railways, elevated light rails, and high-speed railways.

[0029] It should be pointed out that in the floating ballast provided with an easy-to-maintain center-mounted shear hinge of the present invention, the structure of the shear-bearing parts can be varied. For example, in addition to round steel bars, the shear-bearing parts can also be made of square steel bars, round steel pipes, square steel pipes, channel steels, I-beams and other forms of metal profiles. As long as the strength is sufficient, they can be applied to the present invention and achieve good technical effects. In addition, in this example, the fixing of the wedge block by the universal thread cooperation between the locking member and the anchoring connector is explained as an example. In practice, the locking member and the anchoring connector can also be fixed by other connection methods such as snap-fit, hanging, etc. to achieve the fixing of the wedge block, which can also achieve good technical effects. These are simple changes based on the technical principles of the present invention and are all within the protection scope required by the present invention.

[0030] Embodiment 2

[0031] like Figure 3 and Figure 4 The present invention shown in the figure is provided with a floating ballast bed with an easy-to-maintain central shear hinge. The difference from the technical solution described in Example 1 is that the elastic vibration isolation device 2 adopts a side-mounted structure arrangement in the floating ballast bed; in addition, the installation channels 8 are respectively arranged on both sides of the end of the floating plate 1; in addition, the cross-sectional profile of the assembly groove 4 is wedge-shaped, and two shear bearing members are arranged in each assembly groove 4, and the shear bearing members include a first shear bearing member 13 and a second shear bearing member 14, and the first shear bearing member 13 and the second shear bearing member 14 are respectively composed of a round steel bar and a rubber elastic material layer 15 arranged on the surface thereof.

[0032] Compared with the first embodiment, the floating plate in the technical solution described in this example has a more regular shape, is more convenient to manufacture and arrange reinforcement, and can effectively provide vibration mass; in addition, by adding an elastic material layer made of rubber in the shear bearing member, the tightness of the fit between the shear bearing member and the assembly groove can be effectively improved, and the collision noise generated when there is a fit gap between the two can be prevented, while avoiding accidental damage to the floating plate body structure caused by direct contact and collision between the shear bearing member and the assembly groove during use, which is beneficial to improving the service life of the floating plate; in addition, in this example, two shear bearing members are arranged in each assembly groove. Under the condition that the overall design transmission shear force remains unchanged, the diameter size of each round steel bar used can be smaller than when only one shear bearing member is arranged. The use of this technical solution is beneficial to further compressing the internal space of the floating plate occupied by the assembly groove and the central shear hinge structure, facilitating the reinforcement and manufacture of the floating plate, avoiding excessive weakening of the local strength of the floating plate body, and helping to improve the service life of the floating plate.

[0033] It should be pointed out that, based on the technical principles of this example, the number of shear-bearing members arranged in each assembly groove may be two, or one, three or more, and may be designed according to engineering needs when applied; in addition, the elastic material layer arranged in the shear-bearing member may be made of other materials such as elastic polyurethane in addition to rubber material, which can also achieve good technical effects and are within the protection scope required by the present invention.

[0034] Embodiment 3

[0035] like Figure 5 The floating ballast of the present invention shown in the figure is provided with an easy-to-maintain mid-mounted shear hinge. The difference from the second embodiment is that the shear bearing member includes a first shear bearing member 13 and a second shear bearing member 14. The first shear bearing member 13 and the second shear bearing member 14 are respectively composed of a square steel bar and a polyurethane elastic material layer 15 arranged on the surface thereof. The cross-sectional profile of the first shear bearing member 13 and the second shear bearing member 14 is wedge-shaped corresponding to the cross-sectional profile of the assembly groove 4; the side wall of the assembly groove 4 is provided with a frame 16, which is welded by steel plates and pre-cast into one piece with the floating plate 1.

[0036] Compared with the second embodiment, in the technical scheme described in this embodiment, the cross-sectional profiles of the first shear bearing member 13 and the second shear bearing member 14 are wedge-shaped corresponding to the cross-sectional profile of the assembly groove 4, and the shear bearing member and the assembly groove fit more tightly, which can better prevent the collision noise generated when there is a fitting gap between the two. In addition, after the shear bearing member adopts a square steel bar, when subjected to shear force, the contact and fitting area between the shear bearing member and the assembly groove is larger, and the local pressure generated on the floating plate structure of the side wall of the assembly groove is smaller, which can effectively prevent the floating plate structure of the side wall of the assembly groove from being crushed, which is beneficial to improve the service life of the floating plate. In particular, in this embodiment, a reinforcement frame 16 is added to the side wall of the assembly groove 4, which can effectively protect the concrete structure of the side wall of the assembly groove from accidental collision damage or fatigue damage, and significantly improve the service life of the floating plate. Of course, in addition to using steel plates to make reinforcement frames, frames can also be made of other materials such as stainless steel and engineering plastics. In actual applications, they can be selected according to engineering needs and can all achieve good technical effects. They are all simple changes based on the technical principles of the present invention. They are only explained in words here and are all within the protection scope required by the present invention.

[0037] The embodiments of the present invention are only for better illustrating the technical solutions of the present invention and should not be regarded as limitations of the present invention. The technical features in many embodiments may also be used interchangeably. Based on the technical principles of the present invention, those skilled in the art may re-combine the technical solutions described in the above embodiments or simply replace some of the components therein with similar technologies. As long as they are based on the technical principles of the present invention, they are all within the protection scope required by the present invention.

Claims

1. A floating ballast with an easy-to-maintain center-mounted shear hinge, comprising a floating plate and an elastic vibration isolation device, wherein the floating plate is elastically supported by the elastic vibration isolation device, and adjacent floating plates are connected via a center-mounted shear hinge structure, characterized in that: The central shear hinge structure comprises a shear bearing member, and mounting grooves are respectively arranged on both sides of the end of the floating plate, and the mounting grooves are arranged in the middle of the thickness direction of the floating plate body, and the two ends of the shear bearing member are respectively embedded in the mounting grooves correspondingly arranged on the adjacent floating plates to connect the adjacent floating plates, and the floating plates are also provided with a mounting channel corresponding to the mounting groove, and the mounting grooves are respectively provided with open openings corresponding to the mounting channel and the end surface of the floating plate, and a locking device, a limiting boss and an anchoring connector are arranged at the opening of the mounting groove at the bottom of the mounting channel corresponding to the bottom of the mounting channel, and the limiting boss and the anchoring connector are integrated with the floating plate, and the locking device comprises a wedge block and a locking member, and the wedge block is located between the limiting boss and the shear bearing member, and the locking member and the anchoring connector are used to fix the wedge block on the floating plate; the cross-sectional profile of the mounting groove is a wedge-shaped with a large opening and a small inside; the cross-sectional profile of the shear bearing member is wedge-shaped corresponding to the cross-sectional profile of the mounting groove; a reinforcing frame is provided on the side wall of the mounting groove, and the reinforcing frame is pre-cast into one body with the floating plate.

2. The floating ballast with an easy-to-maintain mid-mounted shear hinge according to claim 1, characterized in that: The shear-resistant load-bearing member is composed of a shear-resistant core rod made of a metal material and an elastic material layer arranged on the surface thereof.

3. The floating ballast with an easy-to-maintain center-mounted shear hinge according to claim 1, characterized in that: Two or more shear bearing members are arranged in one assembly groove.

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