Plate type track structure of large-span steel truss girder bridge

Abstract

The utility model provides a plate type track structure of a large-span steel truss girder bridge, which belongs to the technical field of engineering construction and comprises a steel rail, a fastener, a sleeper plate, a high-strength anchor bolt component, geotechnical cloth, an under-plate cushion layer, a limiting component and a steel truss girder open bridge floor. The steel rail is installed on the sleeper plate through a fastener, the lower surface of the sleeper plate is attached to the geotechnical cloth, the lower surface of the under-plate cushion layer is attached to the surface of a longitudinal beam of a steel truss girder open bridge floor, and the high-strength anchor bolt assembly sequentially penetrates through the longitudinal beam of the steel truss girder open bridge floor, the under-plate cushion layer, the geotechnical cloth and the sleeper plate from bottom to top and is anchored to the upper surface of the sleeper plate. Limiting grooves are formed in the concrete cushion layer below the sleeper slab and the four corners of the sleeper slab, and the limiting assemblies are located in the limiting grooves for limiting. The sleeper slabs are connected with the open bridge floor longitudinal beams through the high-strength bolt assemblies, so that the stability of connection with the steel truss girder open bridge floor under the cyclic load effect of a train can be kept.

Description

TECHNICAL FIELD

[0001] The utility model relates to engineering construction technical field especially relates to a large -span steel truss girder bridge's plate type track structure. BACKGROUND

[0002] Large-span steel trutt girder bridge has the advantages of fast construction speed, strong bearing capacity, etc., and is widely used in general speed railway, passenger and freight common line railway and urban rail transit construction.

[0003] The wood sleeper open bridge deck track laid on the traditional steel truss girder is limited by the easy decay of wood sleeper, and the structure service life is short, the ballast track bridge deck system is not easy to check and maintain and has large dead weight, and the synthetic resin sleeper track cost is too high and is not suitable for large-scale laying application. In summary, the existing sleeper structure for open bridge deck has poor limiting ability under long-term operation state, and it is difficult to maintain geometric shape, and the maintenance cost is high and difficult to manage, and the requirements of track structure stability and line operation and maintenance economy cannot be met. UTILITY MODEL CONTENTS

[0004] The utility model provides a large -span steel truss girder bridge's plate type track structure to solve the defects of sleeper structure in the prior art, improve the stability and durability of structure.

[0005] The utility model provides a large -span steel trutt girder bridge's plate type track structure, include: rail, fastener, sleeper plate, high -strength anchoring bolt subassembly, geotextile, under -plate cushion, limiting assembly and steel truss girder open bridge deck, the rail is installed on the sleeper plate through the fastener, the sleeper plate lower surface is pasted with geotextile, the under -plate cushion lower surface is pasted with the longitudinal beam surface of steel truss girder open bridge deck, high -strength anchoring bolt subassembly passes in proper order through steel truss girder open bridge deck longitudinal beam, under -plate cushion, geotextile, sleeper plate from bottom to top, and is anchored on the sleeper plate upper surface, the sleeper plate lower concrete cushion and the sleeper plate four corner position are equipped with limiting recess, and the limiting assembly is located limiting recess and is positioned.

[0006] According to the utility model provides a large -span steel trutt girder bridge's plate type track structure, high -strength anchoring bolt subassembly includes: screw rod, bolt cover cap, nut, upper washer, bolt cover plate and lower washer, after the screw rod installs lower washer, passes in proper order through steel truss girder open bridge deck longitudinal beam, under -plate cushion, geotextile, sleeper plate from bottom to top, and then is fixed through installing bolt cover plate, upper washer, nut and bolt cover cap in proper order again.

[0007] According to the utility model provides a large -span steel trutt girder bridge's plate type track structure, sleeper plate and under -plate cushion all are provided with two through bolt holes for installing screw rod.

[0008] According to the present invention, a plate track structure for a long-span steel truss bridge is provided, wherein the limiting component includes a limiting block and a connecting pin, and the limiting block is welded to the longitudinal beam of the open bridge deck of the steel truss bridge via the connecting pin.

[0009] According to the present invention, a plate track structure for a large-span steel truss bridge is provided, wherein the limiting block is directly cast onto the longitudinal beam of the open bridge deck of the steel truss.

[0010] According to the present invention, a slab track structure for a large-span steel truss bridge is provided, wherein the limiting block is provided with an elastic buffer pad layer.

[0011] According to the present invention, a slab track structure for a long-span steel truss bridge is provided, wherein the width of the under-slab pad layer is consistent with and aligned with the width of the longitudinal beams of the exposed bridge deck of the steel truss, and the dimensions of the sleeper plate and the four corner grooves of the pad layer are consistent with and aligned.

[0012] According to the present invention, a slab track structure for a long-span steel truss bridge is provided, wherein the center position of the bolt holes in the under-slab pad layer is consistent with the hole diameter and hole spacing of the bolts on the sleeper plate and the open bridge surface of the steel truss.

[0013] According to the present invention, a slab track structure for a long-span steel truss bridge is provided, wherein threaded posts are provided in the bolt holes of the sleeper plate, and the shape of the threaded posts matches that of the screw rod.

[0014] According to the slab track structure of a long-span steel truss bridge provided by this utility model, the shape of the limiting groove matches the limiting block, and the shape can be square, semi-circular, polygonal, etc.

[0015] The slab track structure for long-span steel truss bridges provided by this utility model connects sleeper plates to the longitudinal beams of the exposed bridge deck via high-strength bolt assemblies, maintaining stability of the connection with the steel truss bridge deck under cyclic train loads. The sleeper plates, in conjunction with limiting components, restrict longitudinal movement of the sleeper plates. The sleeper plate track structure is a detachable assembly structure, offering advantages such as high construction efficiency and convenient operation and maintenance. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the overall structure of the slab track structure for a large-span steel truss bridge provided by this utility model.

[0018] Figure 2 This is an exploded view of the slab track structure of the large-span steel truss bridge provided by this utility model.

[0019] Figure 3 This is a structural schematic diagram of the high-strength anchor bolt assembly provided by this utility model;

[0020] Figure 4 This is a schematic diagram of the concrete limiting block and the elastic buffer pad layer provided by this utility model;

[0021] Figure 5 This is a schematic diagram of the connecting pin provided by this utility model;

[0022] Figure 6 This is a schematic diagram of the sleeper plate provided by the utility model;

[0023] Figure 7 This is a schematic diagram of the concrete pad layer under the slab provided by the utility model.

[0024] Figure 8 This is a flowchart of the assembly process for the slab track structure of a large-span steel truss bridge provided by the utility model.

[0025] Figure label:

[0026] 100. Steel rails;

[0027] 200. Fasteners;

[0028] 300. Rail sleeper slab;

[0029] 310. Limiting groove; 320. Bolt hole;

[0030] 400. High-strength anchor bolt assembly;

[0031] 410. Screw; 420. Bolt cap; 430. Nut; 440. Upper washer; 450. Bolt cover plate; 460. Lower washer;

[0032] 500. Geotextile;

[0033] 600. Subfloor layer;

[0034] 610. Bolt hole; 620. Limiting groove;

[0035] 700, Limiting components;

[0036] 710. Limiting block; 711. Elastic buffer pad; 720. Connecting pin;

[0037] 800. Steel truss open bridge deck. Detailed Implementation

[0038] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0039] In the description of this utility model, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, features defined with "first" and "second" may explicitly or implicitly include one or more of the stated features. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0040] In the description of this utility model, it should be understood that the directional terms such as "front, back, up, down, left, right", "horizontal, vertical, perpendicular, horizontal" and "top, bottom" indicate the orientation or positional relationship, which is usually based on Figure 1 The orientation and position of the slab track structure of the large-span steel truss bridge shown are for the convenience of describing this utility model and simplifying the description. Unless otherwise stated, these directional terms do not indicate or imply that the device or component referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the scope of protection of this utility model. The directional terms "inner" and "outer" refer to the inner and outer contours of each component itself.

[0041] It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0042] This utility model provides a slab track structure for a long-span steel truss bridge, comprising: a steel rail 100, fasteners 200, a sleeper plate 300, a high-strength anchor bolt assembly 400, geotextile 500, a sub-slab pad 600, a limiting assembly 700, and a steel truss open bridge deck 800; the steel rail 100 is installed on the sleeper plate 300 via the fasteners 200, the lower surface of the sleeper plate 300 is in contact with the geotextile 500, and the lower surface of the sub-slab pad 600 is in contact with the geotextile 500. The longitudinal beams of the steel truss bridge deck 800 are attached to each other. The high-strength anchor bolt assembly 400 passes through the longitudinal beams of the steel truss bridge deck 800, the under-slab pad 600, the geotextile 500, and the sleeper plate 300 from bottom to top, and is anchored to the upper surface of the sleeper plate 300. The concrete pad under the sleeper plate 300 and the four corners of the sleeper plate 300 are provided with limiting grooves 310. The limiting assembly 700 is located at the limiting grooves 310 for limiting.

[0043] The sleeper plate 300 is connected to the longitudinal beams of the open bridge deck via high-strength bolt assemblies, maintaining stability in the connection with the steel truss open bridge deck 800 under train cyclic loads. The sleeper plate 300, in conjunction with the limiting assembly 700, restricts longitudinal movement of the sleeper plate 300. The sleeper plate 300 type track structure is a detachable assembly structure, offering advantages such as high construction efficiency and convenient operation and maintenance.

[0044] For example, the upper surface of the sleeper plate 300 is connected to the fastener 200 system through a pre-embedded sleeve and anchor bolts, thereby fixing the fastener 200 system and the rail 100 to the sleeper.

[0045] In one embodiment, the high-strength anchor bolt assembly 400 includes: a bolt 410, a bolt cap 420, a nut 430, an upper washer 440, a bolt cover plate 450, and a lower washer 460; after the lower washer 460 is installed, the bolt 410 passes through the longitudinal beam of the steel truss bridge deck 800, the under-slab pad 600, the geotextile 500, and the sleeper plate 300 from bottom to top, and is then fixed by sequentially installing the bolt cover plate 450, the upper washer 440, the nut 430, and the bolt cap 420.

[0046] The upper washer 440 of the bolt is located between the nut 430 and the bolt cover plate 450, and the bolt cover plate 450 is in close contact with the upper surface of the sleeper plate 300. The lower washer 460 of the bolt is located between the bolt 410 and the lower surface of the longitudinal beam of the open bridge deck 800 of the steel truss, and a semi-circular bolt cap 420 is provided on the nut 430.

[0047] In one embodiment, both the sleeper plate 300 and the under-plate pad 600 are provided with two through bolt holes 320 for installing the screw 410.

[0048] In one embodiment, the limiting component 700 includes a limiting block 710 and a connecting pin 720. The limiting block 710 is welded to the longitudinal beam of the open bridge deck 800 of the steel truss bridge via the connecting pin 720, serving as a fixing device for the limiting block 710. The limiting block 710 is directly cast into the longitudinal beam of the open bridge deck 800 of the steel truss bridge. The limiting block 710 is provided with an elastic buffer pad 711, which can buffer and reduce vibration, and protect the limiting block 710.

[0049] For example, in this instance, the length and width of the concrete limiting block 7107 are 360mm and 310mm, respectively.

[0050] In one embodiment, the width of the under-slab pad 600 is the same as and aligned with the width of the longitudinal beam of the steel truss bridge deck 800, and the dimensions of the four corner grooves of the sleeper plate 300 are the same as and aligned with the dimensions of the under-slab pad. The center position of the bolt holes 320 of the under-slab pad 600 is consistent with the hole diameter and hole spacing of the bolts on the sleeper plate 300 and the steel truss bridge deck 800.

[0051] The sleeper plate 300 has a threaded post in the bolt hole 320, and the shape of the threaded post matches that of the screw 410.

[0052] In one embodiment, the shape of the limiting groove 310 matches that of the limiting block 710, and the shape can be square, semi-circular, polygonal, etc.

[0053] In one embodiment, the standard gap between the two sleeper plates 300 is 20mm, and the gap can be specially designed according to the design fastener 200 spacing.

[0054] For example, in this example, the sleeper plate 300 has dimensions of 1200mm × 2720mm × 240mm. L-shaped grooves are provided at the four corners of the sleeper plate 300, with a length of 360mm and a width of 145mm. Symmetrically, bolt holes 320 with a radius of 40mm are provided on the sleeper plate 300 at a position 1210mm from the track centerline for installing high-strength anchor bolt assemblies 400.

[0055] The assembly process and the height adjustment process for the sleeper slab 300 are as follows: The sleeper slab 300 is prefabricated in the factory using a continuous assembly line method. The construction and assembly method of the structure is as follows: 1. Install the under-slab pad 600 and geotextile 500; 2. Roughly lay the sleeper slab 300, and finely adjust the sleeper slab 300 according to the geometric positioning adjustment information of the sleeper slab 300 obtained from monitoring; 3. Erect the formwork and pour the concrete pad under the slab; 4. Weld the connecting pins 720 and pour the limiting blocks 710; 5. After the concrete has cured, install the elastic buffer pad 711 of the blocks, the high-strength bolt assembly, the fasteners 200 and the rails 100 in sequence.

[0056] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A slab track structure for a long-span steel truss bridge, characterized in that, include: Rails, fasteners, sleeper plates, high-strength anchor bolt assemblies, geotextiles, underlayment, limiting components, and open bridge deck of steel truss girder; The rail is installed on the sleeper plate by the fastener. The lower surface of the sleeper plate is in contact with the geotextile. The lower surface of the pad under the plate is in contact with the surface of the longitudinal beam of the open bridge deck of the steel truss. The high-strength anchor bolt assembly passes through the longitudinal beam of the open bridge deck of the steel truss, the pad under the plate, the geotextile, and the sleeper plate from bottom to top, and is anchored to the upper surface of the sleeper plate. The concrete pad under the sleeper slab and the four corners of the sleeper slab are provided with limiting grooves, and the limiting component is located at the limiting groove to limit the movement.

2. The slab track structure for a long-span steel truss bridge according to claim 1, characterized in that, The high-strength anchor bolt assembly includes: a bolt, a bolt cap, a nut, an upper washer, a bolt cover plate, and a lower washer; after the lower washer is installed, the bolt passes through the longitudinal beam of the open bridge deck of the steel truss in sequence from bottom to top, the under-slab pad, the geotextile, and the sleeper plate, and is then fixed by sequentially installing the bolt cover plate, the upper washer, the nut, and the bolt cap.

3. The slab track structure for a long-span steel truss bridge according to claim 2, characterized in that, Both the sleeper plate and the under-plate pad are provided with two through bolt holes for installing the bolts.

4. The slab track structure for a long-span steel truss bridge according to claim 1, characterized in that, The limiting component includes a limiting block and a connecting pin, wherein the limiting block is welded to the longitudinal beam of the open deck of the steel truss bridge via the connecting pin.

5. The slab track structure for a long-span steel truss bridge according to claim 4, characterized in that, The limiting block is directly cast into the longitudinal beam of the open bridge deck of the steel truss.

6. The slab track structure for a long-span steel truss bridge according to claim 5, characterized in that, The limiting block is equipped with an elastic buffer pad layer.

7. The slab track structure for a long-span steel truss bridge according to claim 1, characterized in that, The width of the underlayment is consistent with and aligned with the width of the longitudinal beam of the steel truss bridge deck, and the dimensions of the four corner grooves of the sleeper plate are consistent with and aligned with those of the underlayment.

8. The slab track structure for a long-span steel truss bridge according to claim 3, characterized in that, The center position of the bolt holes in the under-slab pad layer is consistent with the hole diameter and hole spacing of the bolts on the sleeper plate and the open bridge surface of the steel truss girder.

9. The slab track structure for a long-span steel truss bridge according to claim 8, characterized in that, The bolt holes of the sleeper plate are provided with threaded posts, the shape of which matches the screw.

10. The slab track structure for a long-span steel truss bridge according to claim 4, characterized in that, The shape of the limiting groove matches the shape of the limiting block, and the shape can be semi-circular or polygonal.

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