Ballast railway bridge deck assembly type ballast blocking telescopic device

Abstract

An assembly type ballast blocking telescopic device for a ballast railway bridge floor is characterized by comprising a ballast blocking steel plate, a cushion layer, a telescopic water stop belt and a fixing assembly. By adopting the assembly type telescopic structure, the working efficiency during disassembly, assembly, replacement, maintenance and reinforcement is improved, the use performance of the telescopic structure is improved, the working environment of operators is improved, the working efficiency is improved, the influence of structural operation on line operation is reduced, and the high-quality development of railway line operation is promoted.

Description

Technical Field

[0001] This utility model relates to the field of bridge operation and maintenance technology, and in particular to a prefabricated ballast expansion joint for ballast railway bridge decks. Background Technology

[0002] Currently, after the existing railway ballast bridge deck is installed, ballast-retaining steel plates need to be placed between the beam ends and between the beam ends and the abutments, i.e., at the expansion joints of adjacent beams. At the same time, expansion joints need to be installed in the gaps between the beams under the ballast-retaining steel plates. Expansion joints made of elastic materials, such as rubber, are used to ensure that there is sufficient displacement and deformation allowance between the beams while preventing ballast and bridge deck mud and water from falling onto the supporting piers between the beams.

[0003] The existing technology involves installing the expansion joint under a cast-in-place fine aggregate concrete cushion layer. The fine aggregate concrete cushion layer is then cast between the expansion joint's fixing components (angle steel brackets, pressure plates, and bolts) and the beam, ensuring complete bonding between the expansion joint's transverse edges and the beam. However, due to the installation structure and material characteristics of the expansion joint, it must be replaced periodically. The existing concrete pouring method requires a significant amount of time for installation, maintenance, reinforcement, and replacement of the expansion joint, occupying considerable space, equipment, and personnel. This not only results in low work efficiency and high costs but also significantly impacts railway line operation. Summary of the Invention

[0004] This utility model proposes a prefabricated ballast retaining expansion joint for ballasted railway bridge decks. It adopts a prefabricated structure, which is convenient for disassembly, assembly, and maintenance. It requires less space, personnel, and equipment and has little impact on railway line operation.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A prefabricated ballast expansion joint for a ballast railway bridge deck, characterized by including ballast steel plates, a pad layer, an expansion waterstop, and fixing components;

[0007] The ballast retaining steel plate is laid on the expansion joint between two adjacent beams. The ballast retaining steel plate includes a long rectangular bridge deck ballast retaining plate with the same slope and width as the bridge deck and two opposing inverted L-shaped ballast retaining plates. The bridge deck ballast retaining plate is laid on the bridge deck expansion joint between two adjacent beams. Each end of the bridge deck ballast retaining plate is provided with an opposing inverted L-shaped ballast retaining plate. The upper horizontal plate and lower vertical plate of the inverted L-shaped ballast retaining plate are each provided with a connecting pin. The inverted L-shaped ballast retaining plate is fastened to the expansion joint between the ballast retaining walls of two adjacent beam sections by connecting pins through the upper horizontal plate and lower vertical plate with inverted L-shaped openings.

[0008] The bridge deck ballast plate has a pad layer on each side of the expansion joint. Under the pad layer, there is an expansion waterstop that connects the two sides of the expansion joint. The expansion waterstop is pressed under the pad layer on both sides of the horizontal direction. The expansion waterstop is provided with opposite fixing components on both sides of the horizontal direction. The fixing components detachably fix the expansion waterstop between two adjacent beams.

[0009] A further solution is as follows: the fixing components include waterstop pressure plates, waterstop brackets, several bolts embedded in the beam body, and matching nuts. The waterstop brackets are strip angle steel of the same length as the bridge deck width. The upper side plate of the angle steel of the waterstop bracket is parallel to the bridge deck, and the lower side plate is perpendicular to the bridge deck. The two transverse ends of the waterstop are respectively laid on the upper side plates of the two waterstop brackets. At the same time, the upper surfaces of the two transverse ends of the waterstop are respectively covered with the waterstop pressure plates. The upper side plate of the waterstop bracket, the two transverse ends of the waterstop, and the waterstop pressure plate are provided with bolt holes corresponding to the positions of the bolts. The bolts pass through the corresponding bolt holes of the upper side plate of the waterstop bracket, the two transverse ends of the waterstop, and the waterstop pressure plate from bottom to top, and then the protruding ends of the bolts are screwed with nuts, thus fixing the waterstop to the beams on both sides.

[0010] A further solution is: in order to increase the connection stability of the device, the lower end face of the pad is provided with a strip groove that is consistent with the shape of the waterstop pressure plate, and the strip groove of the pad is provided with a number of concave holes that are consistent with the shape of the protruding end of the bolt and the nut, corresponding to the position of the fixing bolt.

[0011] A further solution is: In the prior art, to prevent excessive displacement of the ballast steel plate, several straight steel bars are usually set under the ballast steel plate for limiting. In order to avoid the danger of the protruding part of the straight steel bar being easily poked or bumped during transportation and installation, several longitudinally distributed rounded quadrilateral steel bar rings are fixed on the bottom surface of the ballast steel plate.

[0012] The beneficial effects of this utility model are: the use of a prefabricated telescopic structure improves the work efficiency during disassembly, assembly, replacement, maintenance and reinforcement, enhances the performance of the telescopic structure, improves the working environment for operators, increases work efficiency, reduces the impact of structural operations on line operation, and promotes the high-quality development of railway line operation. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the horizontal structure of an embodiment of the present utility model;

[0014] Figure 2 This is a longitudinal structural diagram of an embodiment of the present utility model;

[0015] Figure 3 This is a schematic diagram of the ballast steel plate structure according to an embodiment of the present utility model;

[0016] Figure 4This is a schematic diagram of the cushion layer structure in an embodiment of the present invention. Detailed Implementation

[0017] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Example

[0018] Reference Figure 1-4 As shown, a prefabricated ballast expansion joint for a ballast railway bridge deck includes a ballast steel plate 1, a pad layer 2, an expansion waterstop 3, and a fixing component.

[0019] The ballast steel plate 1 is laid on the expansion joint between two adjacent beams 4. The ballast steel plate 1 includes a long rectangular bridge deck ballast plate 11 with the same slope and width as the bridge deck and two opposing inverted L-shaped ballast plates 12. The bridge deck ballast plate 11 is laid on the bridge deck expansion joint between two adjacent beams 4. Each end of the bridge deck ballast plate 11 is provided with an opposing inverted L-shaped ballast plate. The upper horizontal plate and lower vertical plate of the inverted L-shaped ballast plate 12 are each provided with a connecting pin 121. The inverted L-shaped ballast plate 12 is fastened to the expansion joint between the ballast walls of two adjacent beams 4 through the upper horizontal plate and lower vertical plate with inverted L-shaped openings by the connecting pin 121.

[0020] The bridge deck ballast plate 11 has a pad layer 2 on each side of the expansion joint. Under the pad layer 2, there is an expansion waterstop 3 connecting the two sides of the expansion joint. The expansion waterstop 3 is pressed under the pad layer 2 on both sides of the lateral side. The expansion waterstop 3 has a corresponding fixing component on each side of the lateral side. The fixing component detachably fixes the expansion waterstop 3 between two adjacent beams 4.

[0021] The fixing components include a waterstop pressure plate 5, a waterstop bracket 6, several bolts 7 embedded in the beam 4, and matching nuts 8. The waterstop bracket 6 is a strip angle steel of the same length as the width of the bridge deck. The upper side plate of the angle steel of the waterstop bracket 6 is parallel to the bridge deck, and the lower side plate is perpendicular to the bridge deck. The two transverse ends of the telescopic waterstop 3 are respectively laid on the upper side plates of the two waterstop brackets 6. At the same time, the upper surfaces of the two transverse ends of the telescopic waterstop 3 are respectively covered with the waterstop pressure plate 5. The upper side plate of the waterstop bracket 6, the two transverse ends of the telescopic waterstop 3, and the waterstop pressure plate 5 are provided with bolt holes 9 corresponding to the positions of the bolts 7. The bolts 7 pass through the corresponding bolt holes on the upper side plate of the waterstop bracket 6, the two transverse ends of the telescopic waterstop 3, and the waterstop pressure plate 5 from bottom to top, and then the protruding ends of the bolts 7 are screwed with nuts 8, that is, the telescopic waterstop 3 is fixed to the two beams 5.

[0022] To increase the connection stability of the device, the lower end face of the pad 2 is provided with a strip groove that is consistent with the shape of the waterstop pressure plate 5, and the strip groove of the pad 5 is provided with a number of concave holes that are consistent with the shape of the protruding end of the bolt 7 and the nut 8 at the corresponding position of the bolt 7.

[0023] In the prior art, to prevent excessive displacement of the ballast retaining steel plate 1, several straight steel bars are usually set under the ballast retaining steel plate 1 for limiting. In order to avoid the danger of the protruding part of the straight steel bar being easily poked or bumped during transportation and installation, several longitudinally distributed rounded quadrilateral steel bar rings 13 are fixed on the bottom surface of the ballast retaining steel plate 1.

[0024] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A prefabricated ballast expansion joint for a ballast railway bridge deck, characterized by comprising a ballast steel plate, a cushion layer, an expansion waterstop, and a fixing assembly; The ballast retaining steel plate is laid on the expansion joint between two adjacent beams. The ballast retaining steel plate includes a long rectangular bridge deck ballast retaining plate with the same slope and width as the bridge deck and two opposing inverted L-shaped ballast retaining plates. The bridge deck ballast retaining plate is laid on the bridge deck expansion joint between two adjacent beams. Each end of the bridge deck ballast retaining plate is provided with the opposing inverted L-shaped ballast retaining plates. The upper horizontal plate and lower vertical plate of the inverted L-shaped ballast retaining plates are each provided with connecting pins. The inverted L-shaped ballast retaining plates are directly fastened to the expansion joint between the ballast retaining walls of two adjacent beam sections through the upper horizontal plate and lower vertical plate with inverted L-shaped openings. The bridge deck ballast plate has a pad layer on each side of the expansion joint. Under the pad layer, there is an expansion waterstop that connects the two sides of the expansion joint. The expansion waterstop is pressed under the pad layer on both sides of the horizontal direction. The expansion waterstop is provided with opposite fixing components on both sides of the horizontal direction. The fixing components detachably fix the expansion waterstop between two adjacent beams.

2. The prefabricated ballast retaining expansion joint of a ballasted railway bridge deck as described in claim 1, characterized in that: The fixing components include waterstop pressure plates, waterstop brackets, several bolts embedded in the beam body, and matching nuts. The waterstop brackets are strip angle steel of the same length as the bridge deck width. The upper side plate of the angle steel of the waterstop bracket is parallel to the bridge deck, and the lower side plate is perpendicular to the bridge deck. The two transverse ends of the waterstop are respectively laid on the upper side plates of the two waterstop brackets. At the same time, the upper surfaces of the two transverse ends of the waterstop are respectively covered with the waterstop pressure plates. The upper side plate of the waterstop bracket, the two transverse ends of the waterstop, and the waterstop pressure plate are provided with bolt holes corresponding to the positions of the bolts. The bolts pass through the corresponding bolt holes of the upper side plate of the waterstop bracket, the two transverse ends of the waterstop, and the waterstop pressure plate from bottom to top, and then the protruding ends of the bolts are screwed with nuts, thus fixing the waterstop to the beam body on both sides.

3. The prefabricated ballast retaining expansion joint for ballasted railway bridge decks as described in claim 2, characterized in that... The lower end face of the pad layer is provided with a strip groove that is consistent with the shape of the waterstop pressure plate. The strip groove of the pad layer is provided with several concave holes that are consistent with the shape of the protruding end of the bolt and the nut, corresponding to the position of the fixing bolt.

4. A prefabricated ballast retaining expansion joint for ballasted railway bridge decks as described in claim 1, 2, or 3, characterized in that... Several longitudinally distributed rounded quadrilateral steel bar rings are fixed to the bottom surface of the ballast steel plate.

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