An assembled steel bridge and a method for erecting the same

Abstract

This invention discloses a prefabricated steel bridge and its construction method, belonging to the field of steel bridges. The bridge comprises an assembly mechanism consisting of a sleeve, a positioning tube, and a fixing structure. The fixing structure is arranged inside the positioning tube. The fixing structure includes a connecting component, a movable component A, a limiting ring, a moving component, and a movable component B. The connecting component is located at the bottom of the inner cavity of the positioning tube. The movable component A is located in the gap between the connecting component and the inner cavity of the positioning tube. The movable component B is located above the inner cavity of the positioning tube. The limiting ring is fixed within the inner cavity of the positioning tube. The moving component passes through the limiting ring. The bottom end of the moving component contacts the movable component A, and the top end of the moving component contacts the movable component B. This invention has the advantages of the positioning tube being inserted into the sleeve, the movable component A being compressed, and the movable component B being pushed out by the moving component, thus fixing the positioning tube and the sleeve and maintaining longitudinal stability between them.

Description

Technical Field

[0001] This invention relates to the field of steel bridges, and more specifically, to a prefabricated steel bridge and its construction method. Background Technology

[0002] Prefabricated steel bridges are characterized by simple structure, lightweight components, convenient transportation, flexible combination, rapid erection, convenient disassembly and assembly, and reusable components. They also have advantages such as high load-bearing capacity, strong structural rigidity, and long fatigue life. They can be combined into bridges of different spans, types, and uses according to engineering design needs. They play an important role in military transportation, disaster relief, national defense construction, water conservancy projects, and road transportation at home and abroad, and are widely used.

[0003] Prefabricated steel bridges consist of a base, bridge columns, and a bridge body. The base is pre-fixed on the ground, the bridge columns are erected on the base, and finally the bridge body is erected on the bridge columns. The connection between the bottom of the bridge column and the base, and the connection between the top of the bridge column and the bottom of the bridge body, is generally achieved by inserting steel columns for assembly and positioning. For example, steel columns set on the base are inserted into the openings at the bottom of the bridge columns, and steel columns set at the top of the bridge columns are inserted into the openings at the bottom connection points of the bridge body. This method of steel bridge assembly is highly efficient.

[0004] While the aforementioned prefabricated steel bridge boasts high assembly efficiency, it suffers from the following drawbacks: the assembly and positioning of the base, bridge piers, and bridge body rely on the insertion of multiple steel columns, and the fixation is entirely dependent on a rectangular array of steel columns, resulting in less than ideal longitudinal positioning of the steel bridge. Therefore, we propose a prefabricated steel bridge and its construction method. Summary of the Invention

[0005] 1. Technical problems to be solved

[0006] The purpose of this invention is to provide a prefabricated steel bridge and its construction method to solve the problems mentioned in the background art.

[0007] 2. Technical Solution

[0008] An assembly-type steel bridge includes an assembly mechanism consisting of a sleeve, a positioning tube, and a fixing structure; wherein the fixing structure is arranged inside the positioning tube; the fixing structure includes a connecting component, a movable component A, a limiting ring, a moving component, and a movable component B; the connecting component is arranged at the bottom of the inner cavity of the positioning tube; the movable component A is arranged in the gap between the connecting component and the inner cavity of the positioning tube; the movable component B is arranged above the inner cavity of the positioning tube; the limiting ring is fixed in the inner cavity of the positioning tube; the moving component passes through the limiting ring; wherein the bottom end of the moving component contacts the movable component A, and the top end of the moving component contacts the movable component B.

[0009] Preferably, the connecting assembly includes: a connecting post arranged in the middle of the bottom of the inner cavity of the positioning tube; and a plurality of connecting plates arranged in a ring array and fixed to the outer wall of the connecting post; wherein the end of the connecting plate opposite to the connecting post is fixedly connected to the inner wall of the positioning tube.

[0010] Preferably, the movable component A includes: a plurality of movable blocks A, which are arranged in a circular array and slidably disposed within the through hole A opened at the bottom of the positioning tube;

[0011] The movable block A has an outer arc-shaped inclined surface facing upwards, and an inner vertical plane. A spring A is positioned between the inner side of the movable block A and the outer wall of the connecting column; both ends of the spring A are fixedly connected to the inner side of the movable block A and the outer wall of the connecting column, respectively. A pressing block is fixed to the top of the movable block A; the outer side of the pressing block has an arc-shaped surface that matches the inner wall of the positioning tube, and the inner side of the pressing block has an inclined surface.

[0012] Preferably, the movable component B includes: a plurality of movable blocks B, arranged in a circular array and slidably disposed within a through hole B at the top of the positioning tube; wherein the outer side of each movable block B is provided with an arc-shaped inclined surface facing downwards, and the inner side of each movable block B is provided with a downward-facing inclined surface; a vertical plate, fixedly disposed at the top of the movable blocks B; and a spring B, disposed between one side of the vertical plate and the inner wall of the positioning tube; wherein the two ends of the spring B are respectively fixedly connected to one side of the vertical plate and the inner wall of the positioning tube.

[0013] Preferably, the moving component includes: a plurality of moving strips slidably disposed in a groove opened inside the limiting ring; wherein, the outer sides of the bottom end and the top end of the moving strip are respectively provided as inclined surfaces, the inclined surface on the outer side of the bottom end of the moving strip is adapted to the inclined surface on the inner side of the extrusion block, and the inclined surface on the outer side of the top end of the moving strip is adapted to the inclined surface on the inner side of the movable block B.

[0014] Preferably, the moving component further includes: a limiting strip fixed to the side of the moving strip; wherein the limiting strip passes through a limiting groove opened on the side of the slide; wherein the outer end of the limiting strip is provided as an arc surface, and the limiting strip is adapted to the limiting groove.

[0015] A method for assembling prefabricated steel bridges, the assembly process of which is as follows:

[0016] S1. Prepare an assembly mechanism for steel bridge construction, with the sleeve and positioning tube separated, and the fixing structure assembled inside the positioning tube.

[0017] S2. Several positioning tubes are arranged in a rectangular array on the steel bridge foundation. At this time, the movable block A extends out of the positioning tube, and the movable block B retracts into the positioning tube; the sleeve is embedded in the pre-reserved opening at the bottom of the bridge column for fixation.

[0018] S3. Several positioning tubes are arranged in a rectangular array at the top of the bridge column. At this time, the outer side of the movable block A extends out of the positioning tube, and the movable block B retracts into the positioning tube; the sleeve is embedded in the opening at the bottom connection of the bridge body for fixation.

[0019] S4. During assembly, the base is fixed to the ground, the bridge column is vertical, the bottom end of the bridge column is connected to the base, the positioning tube is inserted into the sleeve, the sleeve moves down with the bridge column until the inner side wall of the bottom of the sleeve presses the outer side of the movable block A, causing the movable block A to retract into the positioning tube, the spring A is compressed, the pressing block retracts with the movable block A, the inner inclined surface of the pressing block presses the outer inclined surface of the bottom end of the moving strip, causing the moving strip to move upward. Under the limit of the limiting ring, the moving strip moves stably, the outer inclined surface of the top end of the moving strip presses the inner inclined surface of the movable block B, causing the movable block B to move out of the positioning tube, the spring B is compressed, the outer arc-shaped inclined surface of the movable block B is inserted into the matching opening above the inner side wall of the sleeve, thereby fixing the sleeve and the positioning tube.

[0020] S5. When connecting the top of the bridge pier to the bottom of the bridge body, refer to the operating steps in S4 above.

[0021] 3. Beneficial effects

[0022] Compared with the prior art, the advantages of this invention are:

[0023] 1. This invention utilizes a sleeve, a positioning tube, and a fixing structure. The sleeve is embedded at the bottom of the bridge body and the connection point at the bottom of the bridge. The positioning tube is positioned at the base and the top of the bridge body. When the positioning tube is inserted into the sleeve, movable component A is compressed, and movable component B is pushed out by the moving component. The positioning tube is then fixed to the sleeve, ensuring longitudinal stability between the two components. This solves the problem that relying on multiple rectangular arrays of steel columns for fixing results in less than ideal longitudinal positioning of the steel bridge.

[0024] 2. This invention, by setting movable block A and movable block B, and the outer arc-shaped inclined surface of movable block A, allows movable block A to retract better into the positioning tube when squeezed by the bottom of the inner wall of the sleeve. The vertical plane on the inner side of movable block A facilitates the connection of spring A. The outer arc-shaped inclined surface of movable block B increases the contact surface inside the opening of the inner wall of the sleeve, resulting in better positioning. Furthermore, the top plane of movable block B abuts against the top wall inside the opening of the inner wall of the sleeve, making the positioning more secure and preventing loosening.

[0025] 3. By setting a limiting strip and a limiting groove, the present invention ensures the stability of the moving strip during its movement, and the setting of the arc-shaped surface at the outer end of the limiting strip makes the limiting strip slide more smoothly in the limiting groove. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the assembly structure of the present invention;

[0027] Figure 2 This is a cross-sectional schematic diagram of the positioning tube and fixing structure of the present invention;

[0028] Figure 3 This is an exploded cross-sectional view of the positioning tube and fixing structure of the present invention;

[0029] Figure 4 This is a top view of the limiting ring structure of the present invention;

[0030] Figure 5 This is a schematic diagram of the assembled cross-sectional structure of the present invention;

[0031] Explanation of the labels in the diagram:

[0032] 1. Sleeve; 2. Positioning tube; 3. Fixing structure;

[0033] 201. Through hole A; 202. Through hole B;

[0034] 301. Connecting component; 302. Movable component A; 303. Limiting ring; 304. Moving component; 305. Movable component B;

[0035] 3011. Connecting column; 3012. Connecting plate;

[0036] 3021. Movable block A; 3022. Compression block; 3023. Spring A;

[0037] 3031, Slide groove; 3032, Limiting groove;

[0038] 3041, Moving bar; 3042, Limiting bar;

[0039] 3051, Movable block B; 3052, Spring B; 3053, Vertical plate. Detailed Implementation

[0040] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0041] In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0042] Example 1

[0043] Please see Figures 1-5 The present invention provides a technical solution:

[0044] An assembly-type steel bridge includes an assembly mechanism consisting of a sleeve 1, a positioning tube 2, and a fixing structure 3. The sleeve 1 is embedded in the bottom of the bridge body and the connection between the bottom of the bridge and the bottom of the bridge. The positioning tube 2 is set in the base and the top of the bridge body.

[0045] The fixed structure 3 is arranged inside the positioning tube 2. The fixed structure 3 includes a connecting component 301, a movable component A 302, a limiting ring 303, a moving component 304, and a movable component B 305. The connecting component 301 is arranged at the bottom of the inner cavity of the positioning tube 2. The movable component A 302 is arranged in the gap between the connecting component 301 and the inner cavity of the positioning tube 2. The movable component B 305 is arranged above the inner cavity of the positioning tube 2. The limiting ring 303 is fixed in the inner cavity of the positioning tube 2. The moving component 304 passes through the limiting ring 303, with the bottom end of the moving component 304 contacting the movable component A 302 and the top end of the moving component 304 contacting the movable component B 305.

[0046] This invention utilizes a sleeve 1, a positioning tube 2, and a fixing structure 3. The sleeve 1 is embedded at the bottom of the bridge body and the connection point at the bottom of the bridge. The positioning tube 2 is positioned at the base and the top of the bridge body. When the positioning tube 2 is inserted into the sleeve 1, the movable component A302 is compressed, and the movable component B305 is pushed out by the moving component 304. The positioning tube 2 is then fixed to the sleeve 1, ensuring longitudinal stability between them. This solves the problem of relying on multiple rectangular arrayed steel columns for fixing, which is ineffective in longitudinal positioning of the steel bridge.

[0047] The connecting assembly 301 includes a connecting post 3011, disposed at the bottom center of the inner cavity of the positioning tube 2; and a plurality of connecting plates 3012, arranged in a circular array and fixed to the outer wall of the connecting post 3011; wherein, one end of the connecting plate 3012 facing away from the connecting post 3011 is fixedly connected to the inner wall of the positioning tube 2. This invention, by providing the connecting assembly 301, positions the movable component A302 at the bottom of the inner cavity of the positioning tube 2, thereby ensuring stability when the movable component A302 moves.

[0048] The movable component A302 includes several movable blocks A3021, which are arranged in a circular array and slidably disposed within the through hole A201 at the bottom of the positioning tube 2. The outer side of each movable block A3021 is formed by an arc-shaped inclined surface facing upwards, while the inner side of each movable block A3021 is formed by a vertical plane. A spring A3023 is arranged between the inner side of the movable block A3021 and the outer wall of the connecting column 3011. Both ends of the spring A3023 are fixedly connected to the inner side of the movable block A3021 and the outer wall of the connecting column 3011, respectively. The elastic coefficient of the spring A3023 is selected and used by technical personnel in this field according to the actual situation. A pressing block 3022 is fixed to the top of the movable block A3021. The outer side of the pressing block 3022 is formed by an arc-shaped surface that fits the inner wall of the positioning tube 2, while the inner side of the pressing block 3022 is formed by an inclined surface. The present invention provides a movable block A3021. The outer arc-shaped inclined surface of the movable block A3021 allows it to retract better into the positioning tube 2 when the outer side of the movable block A3021 is squeezed by the bottom of the inner wall of the sleeve 1. The vertical plane on the inner side of the movable block A3021 facilitates the connection of the spring A3023.

[0049] The movable component B305 includes several movable blocks B3051, which are arranged in a circular array and slidably disposed within the through hole B202 at the top of the positioning tube 2. Each movable block B3051 has an outer arc-shaped slope facing downwards, and an inner slope also facing downwards. A vertical plate 3053 is fixed to the top of the movable blocks B3051. A spring B3052 is arranged between one side of the vertical plate 3053 and the inner wall of the positioning tube 2. Both ends of the spring B3052 are fixedly connected to one side of the vertical plate 3053 and the inner wall of the positioning tube 2, respectively. By setting the movable blocks B3051, the arc-shaped slope on the outer side of the movable blocks B3051 increases the contact surface inside the opening of the inner wall of the insertion sleeve 1, resulting in better positioning. Furthermore, the flat surface at the top of the movable blocks B3051 abuts against the top wall inside the opening of the inner wall of the sleeve 1, making the positioning more secure and preventing loosening.

[0050] The movable component 304 includes several movable strips 3041, which are slidably disposed within a groove 3031 formed inside the limiting ring 303. The bottom and top outer sides of each movable strip 3041 are respectively formed with inclined surfaces. The inclined surface at the bottom outer side of the movable strip 3041 matches the inclined surface inside the pressing block 3022, and the inclined surface at the top outer side of the movable strip 3041 matches the inclined surface inside the movable block B3051. By setting the movable strips 3041 with inclined surfaces at both ends, the present invention allows the movable strips 3041 to better align with the inclined surfaces inside the movable blocks A3021 and B3051 during movement, resulting in smoother positioning.

[0051] The moving component 304 also includes a limiting strip 3042, fixed to the side of the moving strip 3041; wherein the limiting strip 3042 passes through a limiting groove 3032 opened on the side of the slide groove 3031; wherein the outer end of the limiting strip 3042 is provided with an arc-shaped surface, and the limiting strip 3042 is adapted to the limiting groove 3032. By providing the limiting strip 3042 and the limiting groove 3032, the present invention ensures the stability of the moving strip 3041 during its movement, and the arc-shaped surface at the outer end of the limiting strip 3042 makes the sliding of the limiting strip 3042 within the limiting groove 3032 smoother.

[0052] Example 2

[0053] A method for assembling prefabricated steel bridges, the assembly process of which is as follows:

[0054] S1. Prepare an assembly mechanism for steel bridge construction, with sleeve 1 and positioning tube 2 separated, and fixing structure 3 assembled inside the positioning tube 2.

[0055] S2. Several positioning tubes 2 are arranged in a rectangular array on the steel bridge base. At this time, the movable block A3021 extends out of the positioning tube 2, and the movable block B3051 retracts into the positioning tube 2; the sleeve 1 is embedded in the pre-reserved opening at the bottom of the bridge column for fixation.

[0056] S3. Several positioning tubes 2 are arranged in a rectangular array at the top of the bridge column. At this time, the movable block A3021 extends out of the positioning tube 2, and the movable block B3051 retracts into the positioning tube 2; the sleeve 1 is embedded in the opening at the bottom connection of the bridge body for fixation.

[0057] S4. During assembly, the base is fixed to the ground, the bridge column is vertical, and the bottom end of the bridge column is connected to the base. The positioning tube 2 is inserted into the sleeve 1. The sleeve 1 moves down with the bridge column until the inner side wall of the bottom of the sleeve 1 presses against the outer side of the movable block A3021, causing the movable block A3021 to retract into the positioning tube 2. The spring A3023 is compressed, and the pressing block 3022 retracts with the movable block A3021. The inner inclined surface of the pressing block 3022 presses against the outer inclined surface of the bottom end of the moving strip 3041, causing the moving strip 3041 to move upward. Under the limit of the limiting ring 303, the moving strip 3041 moves stably. The outer inclined surface of the top end of the moving strip 3041 presses against the inner inclined surface of the movable block B3051, causing the movable block B3051 to move out of the positioning tube 2. The spring B3052 is compressed, and the outer arc-shaped inclined surface of the movable block B3051 is inserted into the suitable opening above the inner side wall of the sleeve 1, thereby fixing the sleeve 1 and the positioning tube 2.

[0058] S5. When connecting the top of the bridge pier to the bottom of the bridge body, refer to the operating steps in S4 above.

[0059] The positioning tube 2 and the sleeve 1 are fixed together by the fixing structure 3, which makes the positioning tube 2 and the sleeve 1 stable in the longitudinal direction.

[0060] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A prefabricated steel bridge, characterized in that, include: An assembly mechanism consisting of a sleeve (1), a positioning tube (2), and a fixing structure (3); The fixing structure (3) is arranged inside the positioning tube (2); The fixed structure (3) includes a connecting component (301), a movable component A (302), a limiting ring (303), a moving component (304), and a movable component B (305); A connecting component (301) is arranged at the bottom of the inner cavity of the positioning tube (2); The active component A (302) is arranged in the gap between the connecting component (301) and the inner cavity of the positioning tube (2); The active component B (305) is arranged above the inner cavity of the positioning tube (2); A limiting ring (303) is fixed in the inner cavity of the positioning tube (2); The movable component (304) is inserted into the limiting ring (303); The bottom end of the moving component (304) contacts the active component A (302), and the top end of the moving component (304) contacts the active component B (305); The sleeve (1) is embedded at the bottom of the bridge body and the connection between the bottom of the bridge, and the positioning tube (2) is set at the base and the top of the bridge body; The connection component (301) includes: A connecting column (3011) is arranged in the middle of the bottom of the inner cavity of the positioning tube (2); The active component A (302) includes: Several movable blocks A (3021) are arranged in a ring array and slidably disposed in the through hole A (201) opened at the bottom of the positioning tube (2); Spring A (3023) is arranged between the inner side of the movable block A (3021) and the outer wall of the connecting column (3011); The compression block (3022) is fixed to the top of the movable block A (3021); The inner side of the extrusion block (3022) is provided as an inclined surface; The active component B (305) includes: Several movable blocks B (3051) are arranged in a ring array and slidably disposed in the through hole B (202) opened at the top of the positioning tube (2); The inner side of the movable block B (3051) is set as a downward inclined surface, and the outer arc-shaped inclined surface of the movable block B (3051) is inserted into the adapted opening above the inner wall of the sleeve (1); A vertical plate (3053) is fixed to the top of the movable block B (3051); Spring B (3052) is arranged between one side of the vertical plate (3053) and the inner wall of the positioning tube (2); The moving component (304) includes: Several movable bars (3041) are slidably disposed in the grooves (3031) opened inside the limiting ring (303); The bottom and top outer sides of the moving strip (3041) are respectively set as inclined surfaces; the inclined surface on the bottom outer side of the moving strip (3041) is adapted to the inclined surface on the inner side of the extrusion block (3022), and the inclined surface on the top outer side of the moving strip (3041) is adapted to the inclined surface on the inner side of the movable block B (3051).

2. The prefabricated steel bridge according to claim 1, characterized in that, The connection component (301) further includes: Several connecting plates (3012) are fixed in a ring array on the outer wall of the connecting column (3011); The end of the connecting plate (3012) facing away from the connecting column (3011) is fixedly connected to the inner wall of the positioning tube (2).

3. A prefabricated steel bridge according to claim 2, characterized in that, The outer side of the movable block A (3021) is provided as an arc-shaped inclined surface, the arc-shaped inclined surface faces upward, and the inner side of the movable block A (3021) is provided as a vertical plane; Wherein, the two ends of the spring A (3023) are respectively fixedly connected to the inner side of the movable block A (3021) and the outer wall of the connecting column (3011); The outer side of the extrusion block (3022) is provided with an arc-shaped surface, which is adapted to the inner wall of the positioning tube (2).

4. A prefabricated steel bridge according to claim 3, characterized in that, The outer side of the movable block B (3051) is provided with an arc-shaped inclined surface, and the arc-shaped inclined surface faces downward; The two ends of the spring B (3052) are fixedly connected to one side of the vertical plate (3053) and the inner wall of the positioning tube (2), respectively.

5. A prefabricated steel bridge according to claim 4, characterized in that, Several movable bars (3041) are slidably disposed in the grooves (3031) opened inside the limiting ring (303).

6. A prefabricated steel bridge according to claim 5, characterized in that, The moving component (304) further includes: A limiting strip (3042) is fixed to the side of the movable strip (3041); The limiting strip (3042) passes through the limiting groove (3032) opened on the side of the slide (3031); The outer end of the limiting strip (3042) is provided as an arc-shaped surface, and the limiting strip (3042) is adapted to the limiting groove (3032).

7. A method for assembling a prefabricated steel bridge according to any one of claims 1-6, characterized in that, The setup process is as follows: S1. Prepare an assembly mechanism for steel bridge construction. The sleeve (1) and the positioning tube (2) are separated, and the fixing structure (3) is assembled in the inner cavity of the positioning tube (2). S2. Several positioning tubes (2) are arranged in a rectangular array on the steel bridge base. At this time, the movable block A (3021) extends out of the positioning tube (2), and the movable block B (3051) retracts into the positioning tube (2); the sleeve (1) is embedded in the pre-reserved opening at the bottom of the bridge column for fixation. S3. Several positioning tubes (2) are arranged in a rectangular array at the top of the bridge column. At this time, the movable block A (3021) extends out of the positioning tube (2) and the movable block B (3051) retracts into the positioning tube (2); the sleeve (1) is embedded in the opening at the bottom connection of the bridge body for fixation. S4. During assembly, the base is fixed to the ground, the bridge column is vertical, and the bottom end of the bridge column is connected to the base. The positioning tube (2) is inserted into the sleeve (1). As the bridge column moves down, the sleeve (1) until the inner wall of the bottom of the sleeve (1) presses against the outer side of the movable block A (3021), causing the movable block A (3021) to retract into the positioning tube (2). The spring A (3023) is compressed, and the pressing block (3022) retracts along with the movable block A (3021). The inner inclined surface of the pressing block (3022) presses against the moving strip (304). 1) The outer slope of the bottom end causes the moving strip (3041) to move upward. Under the limit of the limiting ring (303), the moving strip (3041) moves stably. The outer slope of the top of the moving strip (3041) presses the inner slope of the movable block B (3051), causing the movable block B (3051) to move out of the positioning tube (2). The spring B (3052) is compressed, and the outer arc-shaped slope of the movable block B (3051) is inserted into the suitable opening above the inner wall of the sleeve (1), thereby fixing the sleeve (1) and the positioning tube (2). S5. When connecting the top of the bridge pier to the bottom of the bridge body, refer to the operating steps in S4 above.

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