Prefabricated track plate limiting boss and arrangement structure thereof

Abstract

The utility model relates to the technical field of prefabricated track plates, in particular to a prefabricated track plate limiting boss and an arrangement structure thereof, the prefabricated track plate limiting boss comprises a steel plate base, a reinforced concrete stand column is arranged on the steel plate base, and a buffer base plate is pasted on the periphery of the reinforced concrete stand column. A groove is formed in the bottom face of the steel plate base. The utility model has the advantages that: (1) factory prefabrication is adopted, so that the appearance quality of the limiting boss, the quality of concrete and the pasting quality of the rubber buffer base plate are ensured to be better; positioning installation of the prefabricated limiting boss is achieved through the positioning pin, the structure is simple, and the construction efficiency is high; and (3) a preset hoisting ring structure is adopted, so that on-site hoisting construction is facilitated, and the requirement of convenient replacement in an operation period is met.

Description

Technical Field

[0001] The utility model relates to the technical field of precast track slabs, in particular to a limiting boss of a precast track slab and its layout structure. Background Art

[0002] For cast-in-place ballast beds and precast slab ballast beds, limiting bosses are often used to limit the ballast bed. At present, most of the limiting bosses adopt the on-site cast-in-place process. The on-site binding of steel bars and pouring of concrete are likely to lead to slow progress and poor implementation effects. The currently common defects are as follows: 1) Not meeting the design requirements: Due to construction errors, the design is based on square bosses as the standard, but the actual construction is diamond-shaped; 2) Not meeting the construction requirements: The buffer rubber pads wrapped by some limiting bosses are not closely attached, and it is difficult to replace the limiting bosses after damage. Summary of the Invention

[0003] The purpose of the utility model is to provide a limiting boss of a precast track slab and its layout structure according to the deficiencies of the above-mentioned prior art. By using the limiting boss of the precast track slab to limit the cast-in-place ballast bed or the precast slab ballast bed, the construction problems of slow construction progress and difficult construction quality control in the on-site binding of steel bars, pouring of concrete, and pasting of rubber buffer pads for the cast-in-place limiting boss are solved, as well as the maintenance problem that it is difficult to replace the cast-in-place limiting boss during the operation period.

[0004] The purpose of the utility model is achieved by the following technical solutions:

[0005] A limiting boss of a precast track slab, characterized in that: the limiting boss of the precast track slab includes a steel plate base, a reinforced concrete column is arranged on the steel plate base, a buffer pad is pasted on the periphery of the reinforced concrete column, and a groove is arranged on the bottom surface of the steel plate base.

[0006] Vertical steel bars and circular steel bars are arranged inside the reinforced concrete column, wherein several of the vertical steel bars are evenly spaced circumferentially, the bottom ends of the vertical steel bars are respectively welded to the steel plate base, and the circular steel bars tie and connect the several vertical steel bars to form an integral structure.

[0007] A groove is arranged at the top position of the reinforced concrete column, and a pre-embedded lifting ring is arranged in the groove, and the pre-embedded lifting ring does not exceed the surface of the reinforced concrete column.

[0008] The pre-embedded lifting ring is welded to the steel bars of the reinforced concrete column.

[0009] A layout structure of the precast track slab limiting boss mentioned above is characterized in that: the precast track slab limiting boss is installed on the base concrete, positioning pins are arranged on the base concrete, the positioning pins are matched with the grooves arranged on the steel plate base, and the precast track slab limiting boss is in limit cooperation with the base concrete through the positioning pins.

[0010] The embedded lifting ring of the precast track slab limiting boss is used to realize its lifting, and the groove where the embedded lifting ring is located is sealed by polyurethane sealant after being lifted in place.

[0011] The advantages of the present utility model are as follows:

[0012] (1) Prefabricated in the factory to ensure good appearance quality of the limiting boss, concrete quality, and pasting quality of the rubber buffer pad;

[0013] (2) The positioning and installation of the precast limiting boss are realized by using positioning pins, with a simple structure and high construction efficiency;

[0014] (3) The preset lifting ring structure is adopted, which is convenient for on-site lifting construction and meets the requirement of being convenient for replacement during the operation period. Description of the Drawings

[0015] Figure 1 It is a schematic diagram of the layout structure of the present utility model;

[0016] Figure 2 is Figure 1 the sectional view taken along the line A-A in

[0017] Figure 3 is Figure 1 the sectional view taken along the line B-B in

[0018] Figure 4 It is a schematic diagram of the structure of the precast track limiting boss of the present utility model;

[0019] Figure 5 is Figure 4 the top view of

[0020] Figure 6 It is the reinforcement drawing of the precast track limiting boss of the present utility model. Detailed Embodiment

[0021] The features of the present utility model and other related features are further described in detail below with reference to the drawings through embodiments for the understanding of those skilled in the same industry:

[0022] As Figures 1-6As shown in the figure, the markings 1-15 in the figure respectively represent: precast track slab 1, limit boss hole 2, fastener 3, rail support 4, vibration damping pad 5, reinforced concrete foundation structure 6, reinforced concrete column 7, buffer pad 8, steel plate base 9, positioning pin 10, polyurethane sealant 11, reserved slot for lifting ring 12, lifting ring 13, vertical reinforcement 14, and circumferential reinforcement 15.

[0023] Example: As Figures 1 to 3 shown, in this embodiment, the limit boss of the precast track slab is used to limit the track slab to ensure its position accuracy on the reinforced concrete foundation structure 6. In this embodiment, the track slab is the precast track slab 1, and a limit boss hole 2 matching the limit boss of the precast track slab is reserved during prefabrication, so that the limit boss of the precast track slab can be installed in the limit boss hole 2. However, when the track adopts a cast-in-place ballast bed, first install the limit boss of the precast track slab in this embodiment at the designed position, and then perform cast-in-place outside it, which can also achieve the limit of the cast-in-place ballast bed.

[0024] As Figure 2 shown, the rail is installed on the rail support 4 provided on the surface of the precast track slab 1 through the fastener 3, and a vibration damping pad 5 is provided between the precast track slab 1 and the reinforced concrete foundation structure 6.

[0025] Specifically, as Figures 4 to 6 shown, the limit boss of the precast track slab in this embodiment uses the steel plate base 9 as the foundation. An inward concave groove is provided at the lower center of the steel plate base 9, and this groove is used to match the positioning pin 10. Vertical reinforcements 14 are spacedly distributed on the surface of the steel plate base 9 as the reinforcements of the concrete column. After arranging a number of vertical reinforcements 14 through a number of binding circumferential reinforcements 15 arranged at intervals in the height direction to form the reinforcement structure of the boss, then pour concrete to complete the prefabrication of the reinforced concrete column 7, and then paste the buffer pad 8 around the reinforced concrete column 7 with glue. The buffer pad 8 can adopt a rubber buffer pad.

[0026] In this embodiment, as Figures 4 to 6 shown, a reserved slot for lifting ring 12 is provided at the top of the reinforced concrete column 7 and a lifting ring 13 is provided inside its slot body. The lifting ring 13 can be used for the overall lifting of the limit boss of the precast track slab, which is convenient for construction. In some cases, in order to ensure the mechanical properties of the lifting ring 13, the lifting ring 13 is welded to the structural reinforcements of the reinforced concrete column 7, that is, welded to the vertical reinforcement 14 or the circumferential reinforcement 15, so as to ensure its mechanical properties.

[0027] Combined with Figures 1 to 3As shown, after the base concrete of the reinforced concrete foundation structure 6 is constructed, positioning pins 10 are driven into the designed positions of the limit bosses. The whole limit boss is hoisted through the hoisting ring 13 and placed on the positioning pins 10 to complete the positioning and installation. After hoisting in place, the reserved groove 12 of the hoisting ring and the hoisting ring 13 are sealed with polyurethane sealant 11. Then, the cast-in-place track bed or precast slab track bed outside the limit boss is implemented.

[0028] At this time, since the steel plate base 9 of the limit boss is limited and cooperatively connected with the reinforced concrete foundation structure 6 through the positioning pins 10, the limit boss body is firm and stable, and thus it can ensure the limiting effect on the precast track slab 1 (or cast-in-place track bed).

[0029] When it is necessary to replace the limit boss during the operation period, the polyurethane sealant 11 can be dug out and the hoisting ring 13 can be reused for hoisting and replacement.

[0030] Although the above embodiments have detailed the concept and implementation of the purpose of the present utility model with reference to the drawings, those of ordinary skill in the art can recognize that various improvements and transformations can still be made to the present utility model without departing from the scope defined by the claims, so they will not be elaborated one by one here.

Claims

1. A prefabricated track plate limiting boss, characterized in that: The prefabricated track plate limiting boss comprises a steel plate base, a reinforced concrete column is arranged on the steel plate base, a buffer pad is pasted on the periphery of the reinforced concrete column, and a groove is arranged on the bottom surface of the steel plate base.

2. The prefabricated track plate limiting boss according to claim 1, characterized in that: The reinforced concrete column is provided with vertical steel bars and annular steel bars, wherein several of the vertical steel bars are evenly spaced in annular arrangement, the bottom end of each vertical steel bar is welded to the steel plate base respectively, and the annular steel bars bind and connect several of the vertical steel bars to form an integral structure.

3. The prefabricated track plate limiting boss according to claim 1, characterized in that: A groove is arranged at the top of the reinforced concrete column, and a pre-embedded lifting ring is arranged in the groove. The pre-embedded lifting ring does not exceed the surface of the reinforced concrete column.

4. The prefabricated track plate limiting boss according to claim 3, characterized in that: The embedded lifting ring is welded to the steel bars of the reinforced concrete column.

5. An arrangement structure of the limiting boss of the prefabricated track slab according to any one of claims 1 to 4, characterized in that: The prefabricated track plate limiting boss is installed on the base concrete, a positioning pin is arranged on the base concrete, the positioning pin matches the groove arranged on the steel plate base, and the prefabricated track plate limiting boss is limitedly matched with the base concrete through the positioning pin.

6. The arrangement structure of the limiting boss of the prefabricated track plate according to claim 5 is characterized in that: The embedded hoisting ring of the limiting boss of the prefabricated track plate is used to realize its hoisting, and the groove where the embedded hoisting ring is located is sealed by polyurethane sealant after being hoisted into place.

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