Corrugated steel web prestressed composite box girder bridge

Abstract

The application provides a corrugated steel web prestressed composite box girder bridge, which comprises a concrete bottom plate, a fixing frame and a concrete top plate, and further comprises a supporting assembly, wherein the supporting assembly comprises adjusting components slidingly connected to the outer wall of the fixing frame, adjusting screws rotatably connected to the inner wall of the fixing frame and web plates clamped between the concrete bottom plate and the concrete top plate, the web plate comprises supporting frames rotatably connected to the supporting ends of the two groups of adjusting components, corrugated webs detachably connected to the supporting ends of the supporting frames and auxiliary webs detachably connected to the side walls of the corrugated webs through two groups of connecting portions; the application does not need to fix the web plate through an external scaffold, thereby increasing the convenience of construction, improving the stability of the structure and being applicable to the assembly of composite box girder bridges with different widths, so as to provide effective support for the concrete top plate and the concrete bottom plate, the combined corrugated web is convenient to install and transport, and the construction efficiency is improved.

Description

Technical Field

[0001] This invention relates to the field of bridge engineering technology, and more specifically, to a corrugated steel web prestressed composite box girder bridge. Background Technology

[0002] Corrugated steel web PC composite box girder bridges are a new type of composite beam bridge that uses corrugated steel webs instead of ordinary concrete webs. Replacing ordinary concrete webs with corrugated steel webs effectively solves the common problem of web cracking in traditional PC box girder bridges, improving the shear resistance and structural durability of the webs. The accordion effect of the corrugated steel plates improves prestressing efficiency, and the self-weight of the box girder is reduced by about 20%. However, as the span increases, the shear force on the web increases, and the thickness of the corrugated steel web also increases accordingly, but thick steel plates are usually difficult to press into shape.

[0003] According to the search, the box girder proposed in Chinese patent (application number: 202210591502.0) includes a concrete top slab, at least one corrugated steel web, at least one steel-concrete composite main chord, and at least one steel-concrete composite support chord. One end of the corrugated steel web is fixed to the steel-concrete composite main chord, and the other end is fixed to the concrete top slab. Both ends of the steel-concrete composite support chord are fixed to the steel-concrete composite main chord to form a structural skeleton. The steel-concrete composite main chord is configured to include a steel pipe and an inner lining concrete body filled inside the steel pipe.

[0004] However, the above-mentioned device still has some shortcomings: 1. Since the lengths of the transverse square steel pipes and the oblique square steel pipes are constant, it is impossible to adjust the distance between the corrugated steel webs during installation. Different lengths of transverse square steel pipes and oblique square steel pipes are required, resulting in poor applicability; 2. When the span of the corrugated steel web box girder bridge increases, the shear force on the web increases, and the thickness of the corrugated steel web also increases accordingly. However, it is usually difficult to press and form an integral thick steel plate, and it is not convenient to transport and install.

[0005] Therefore, we have made improvements and proposed a corrugated steel web prestressed composite box girder bridge to solve the problems mentioned above. Summary of the Invention

[0006] The purpose of this invention is to improve upon the problems mentioned in the background art.

[0007] To achieve the above-mentioned objectives, the present invention provides the following technical solution:

[0008] Corrugated steel web prestressed composite box girder bridges are designed to address the aforementioned issues.

[0009] The application is as follows:

[0010] A corrugated steel web prestressed composite box girder bridge includes a concrete bottom slab, a fixing frame fixedly connected to the top wall of the concrete bottom slab, and a concrete top slab fixedly connected to the top wall of the fixing frame, and further includes:

[0011] The support assembly includes an adjusting component slidably connected to the outer wall of the fixed frame, an adjusting screw rotatably connected to the inner wall of the fixed frame, and a web portion snapped between the concrete bottom slab and the concrete top slab. The adjusting component is symmetrically arranged in two sets about the fixed frame, and both sets of the adjusting component cooperate with the adjusting screw. The web portion is symmetrically arranged in two sets about the adjusting component, for supporting and fixing the corrugated steel web.

[0012] The web portion includes a support frame rotatably connected to the support ends of two sets of adjusting components, a corrugated web detachably connected to multiple support ends of the support frame, and an auxiliary web detachably connected to the sidewall of the corrugated web via two sets of connecting parts and symmetrically arranged about the support frame, for supporting the concrete top slab and concrete bottom slab.

[0013] As a preferred technical solution of this application, the adjusting component includes a sliding frame slidably connected to the sliding end of the fixed frame, and connecting rods symmetrically arranged about the fixed frame are rotatably connected to both sides of the sliding frame. The ends of two adjacent sets of connecting rods away from the sliding frame are connected to a set of support frames.

[0014] As a preferred technical solution of this application, the sliding frames contained in the two sets of adjustment components are respectively connected to the two sets of external threads with opposite thread directions on the adjustment screw.

[0015] As a preferred technical solution of this application, both sides of the corrugated web and the auxiliary web are provided with mutually cooperating slots, and both the sidewalls of the corrugated web and the auxiliary web are provided with mutually cooperating connecting holes, which cooperate with the connecting parts.

[0016] As a preferred technical solution of this application, the outer wall of the fixed frame is further provided with a first limiting plate and a second limiting plate that cooperate with the two sets of sliding frames.

[0017] As a preferred technical solution of this application, the top and bottom walls of the support frame are fixedly connected with reinforcing rods corresponding to the auxiliary web plate, and the reinforcing rods are snapped into the auxiliary web plate through connectors.

[0018] As a preferred technical solution of this application, the connecting part includes reinforcing bolts that are detachably connected between the corrugated web and the auxiliary web through connecting holes, and a combination frame connected to the top wall of the concrete base plate, wherein the combination frame is connected to the reinforcing bolts through multiple sets of U-shaped frames.

[0019] As a preferred technical solution of this application, the inner wall of the combined frame should be provided with a combination of a corrugated web and an auxiliary web.

[0020] As a preferred technical solution of this application, buffer pads are provided at the junctions of the combined frame with the corrugated web and the auxiliary web.

[0021] As a preferred technical solution of this application, the fixing frame is fixed to the corrugated web and the auxiliary web by casting, and the corrugated web and the auxiliary web are also provided with uniformly distributed prestressed steel strands inside.

[0022] In the scheme of this application:

[0023] 1. By using the adjustable components, the web section is supported after the fixed frame is fixed to the concrete base frame, eliminating the need for external scaffolding to fix the web section, thus increasing the convenience of construction. At the same time, the distance between the web sections of the pull-in assembly can be adjusted through the cooperation of the sliding frame and connecting rod, making it suitable for the assembly of composite box girder bridges of different widths. This greatly increases its applicability and structural stability, and solves the problem in the existing technology that, due to the constant length of the transverse square steel tubes and oblique square steel tubes, it is impossible to adjust the distance between the corrugated steel web sections during installation, requiring transverse square steel tubes and oblique square steel tubes of different lengths, resulting in poor applicability.

[0024] 2. Multiple corrugated webs can be combined by using the slots on both sides of the corrugated web. At the same time, the auxiliary webs improve the stress limit and, together with the fixing frame, greatly improve the support effect, providing effective support for the concrete top and bottom slabs. The combined corrugated web is easy to install and transport, improving construction efficiency. It solves the problem in the existing technology that when the span of the corrugated steel web box girder bridge increases, the shear force on the web increases, and the thickness of the corrugated steel web also increases accordingly. However, it is usually difficult to press and form an integral thick steel plate, and it is inconvenient to transport and install. Attached Figure Description

[0025] Figure 1 This is one of the three-dimensional structural schematic diagrams of the present invention;

[0026] Figure 2 This is the second schematic diagram of the three-dimensional structure of the present invention;

[0027] Figure 3 This is the third three-dimensional structural schematic diagram of the present invention;

[0028] Figure 4 This is a schematic diagram of the cross-sectional structure of the present invention;

[0029] Figure 5 This is one of the structural schematic diagrams of the present invention;

[0030] Figure 6 This is a second schematic diagram of the structure of the present invention;

[0031] Figure 7 This is the third schematic diagram of the structure of the present invention;

[0032] Figure 8 This is a schematic diagram of the corrugated web structure in this invention.

[0033] In the diagram: 1. Concrete base slab; 2. Fixing frame; 21. Adjusting screw; 22. Sliding frame; 23. Connecting rod; 24. First limiting plate; 25. Second limiting plate; 3. Concrete top slab; 4. Support frame; 41. Corrugated web; 42. Auxiliary web; 43. Slot; 44. Connecting hole; 45. Reinforcing rod; 46. Connecting piece; 47. Prestressed steel strand; 5. Reinforcing bolt; 51. Combined frame; 52. U-shaped frame; 53. Assemblies; 54. Buffer pad. Detailed Implementation

[0034] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0035] Example:

[0036] Please see Figure 1-8 This embodiment proposes a corrugated steel web prestressed composite box girder bridge, including a concrete base slab 1, a fixing frame 2 fixedly connected to the top wall of the concrete base slab 1, and a concrete top slab 3 fixedly connected to the top wall of the fixing frame 2, and further including:

[0037] The support assembly includes an adjusting component slidably connected to the outer wall of the fixed frame 2, an adjusting screw 21 rotatably connected to the inner wall of the fixed frame 2, and a web portion snapped between the concrete bottom plate 1 and the concrete top plate 3. The adjusting component is symmetrically arranged in two sets about the fixed frame 2, and both sets of adjusting components cooperate with the adjusting screw 21. The web portion is symmetrically arranged in two sets about the adjusting component, which are used to support and fix the corrugated steel web.

[0038] The web portion includes a support frame 4 rotatably connected to the support ends of two sets of adjusting components, a corrugated web 41 detachably connected to multiple support ends of the support frame 4, and an auxiliary web 42 detachably connected to the side wall of the corrugated web 41 and symmetrically arranged about the support frame 4 via two sets of connecting parts, for supporting the concrete top slab 3 and the concrete bottom slab 1.

[0039] By using the adjustable components, once the fixing frame 2 is fixed to the concrete base frame, the web section is supported, eliminating the need for external scaffolding to fix the web section, thus increasing the convenience of construction. At the same time, through the cooperation of the sliding frame 22 and the connecting rod 23, the distance between the web sections of the pull-in assembly can be adjusted, making it suitable for the assembly of composite box girder bridges of different widths, greatly increasing its applicability and structural stability.

[0040] like Figure 3-8 As shown, in a preferred embodiment, based on the above method, the adjusting component further includes a sliding frame 22 slidably connected to the sliding end of the fixed frame 2. Both sides of the sliding frame 22 are rotatably connected to connecting rods 23 symmetrically arranged about the fixed frame 2. The ends of two adjacent sets of connecting rods 23 away from the sliding frame 22 are connected to a set of support frames 4. The included angle between two adjacent sets of connecting rods 23 increases or decreases, thereby achieving the purpose of adjusting the distance between the two sets of web plates, realizing the support of the web plate, eliminating the need to fix the web plate through external scaffolding, and increasing the convenience of construction.

[0041] like Figure 3-7 As shown, in a preferred embodiment, based on the above method, the sliding frames 22 included in the two sets of adjusting components are respectively connected to the two sets of external threads with opposite directions on the adjusting screw 21. By rotating the adjusting screw 21, the two sets of sliding frames 22 are driven to move towards or away from each other on the outer wall of the fixed frame 2 through the two sets of external threads with opposite directions on the outer wall. This causes the included angle between the two sets of connecting rods 23 to increase or decrease, thereby achieving the purpose of adjusting the distance between the two sets of web plates. This provides support for the web plate without the need for external scaffolding to fix the web plate, increasing the convenience of construction.

[0042] like Figure 4-8 As shown, in a preferred embodiment, based on the above method, both sides of the corrugated web 41 and the auxiliary web 42 are provided with mutually cooperating slots 43, and both the side walls of the corrugated web 41 and the auxiliary web 42 are provided with mutually cooperating connecting holes 44. The connecting holes 44 cooperate with the connecting parts. The slots 43 on both sides of the corrugated web 41 can allow multiple sets of corrugated webs 41 to be combined. At the same time, the auxiliary web 42 provided improves the stress limit it can withstand, and together with the fixing frame 2, it greatly improves the support effect, which can provide effective support for the concrete top slab 3 and the concrete bottom slab 1. The combined corrugated web 41 is easy to install and transport, and improves the construction efficiency.

[0043] like Figure 1-8As shown, in a preferred embodiment, based on the above method, the outer wall of the fixed frame 2 is further provided with a first limiting plate 24 and a second limiting plate 25 that cooperate with the two sets of sliding frames 22. The first limiting plate 24 and the second limiting plate 25 limit the movement stroke of the sliding frame 22, so that the force on the connecting rod 23 is within the limit range.

[0044] like Figure 1-8 As shown, in a preferred embodiment, based on the above method, the top and bottom walls of the support frame 4 are further fixedly connected with reinforcing rods 45 corresponding to the auxiliary web plates 42. The reinforcing rods 45 are engaged with the auxiliary web plates 42 through connectors 46. The stress on the corrugated web plates 41 is distributed by the reinforcing rods 45 and the two sets of auxiliary web plates 42, thereby increasing the overall support.

[0045] like Figure 2-8 As shown, in a preferred embodiment, based on the above method, the connecting part further includes a reinforcing bolt 5 that is detachably connected between the corrugated web 41 and the auxiliary web 42 through the connecting hole 44, and a combination frame 51 connected to the top wall of the concrete base plate 1. The combination frame 51 is connected to the reinforcing bolt 5 through multiple sets of U-shaped frames 52, and the installation of the corrugated web 41 and the auxiliary web 42 with the top combination frame 51 is completed by the reinforcing bolt 5 and the U-shaped frame 52.

[0046] like Figure 4-8 As shown, in a preferred embodiment, based on the above method, the inner wall of the combined frame 51 should be provided with a combination 53 that cooperates with the corrugated web 41 and the auxiliary web 42, so that the combined frame 51 can be connected to the concrete top plate 3 and the concrete bottom plate 1 through the combination 53.

[0047] like Figure 4-8 As shown, in a preferred embodiment, based on the above method, a buffer pad 54 is further provided at the junction of the combined frame 51 with the corrugated web 41 and the auxiliary web 42. The buffer pad 54 can buffer the concrete top slab 3 and the combined frame 51.

[0048] As shown in 4-8, in a preferred embodiment, based on the above method, the fixing frame 2 is further fixed to the corrugated web 41 and the auxiliary web 42 by casting, and the corrugated web 41 and the auxiliary web 42 are also provided with uniformly distributed prestressed steel strands 47. The distribution and number of prestressed steel strands 47 need to be selected according to the actual application scenario.

[0049] Specifically, in the use of this corrugated steel web prestressed composite box girder bridge: first, the fixing frame 2 and the concrete base slab 1 are fixed by casting. Multiple corrugated webs 41 can be combined using the slots 43 on both sides of the corrugated web 41. Simultaneously, auxiliary webs 42 are fixed to the sidewalls of the corrugated web 41 by reinforcing bolts 5 passing through connecting holes 44. The corrugated web 41 and auxiliary webs 42 are then connected to the combination frame 51 via U-shaped frames 52 and reinforcing bolts 5, increasing the stress limit and greatly improving the support effect, thus providing support for the concrete top slab 3 and... The concrete base slab 1 provides effective support, and the combined corrugated web 41 facilitates installation and transportation, improving construction efficiency. It solves the problem in existing technologies where, as the span of a corrugated steel web box girder bridge increases, the shear force on the web increases, and the thickness of the corrugated steel web also increases accordingly. However, integrated thick steel plates are usually difficult to press into shape and are inconvenient to transport and install. By using the adjustable components, rotating the adjusting screw 21 causes two sets of oppositely oriented external threads on the outer wall to drive two sets of sliding frames 22 to move towards or away from each other on the outer wall of the fixed frame 2. This, in turn, increases or decreases the included angle between adjacent sets of connecting rods 23, thereby achieving the purpose of adjusting the distance between the two sets of web plates. This provides support for the web section without the need for external scaffolding to fix it, increasing construction convenience. It is suitable for assembling combined box girder bridges of different widths, greatly increasing its applicability and structural stability. It also solves the problem in existing technologies where the lengths of the transverse and oblique square steel tubes are constant, making it impossible to adjust the distance between the corrugated steel web plates during installation, requiring different lengths of transverse and oblique square steel tubes. The problem of poor applicability of directional and oblique directional steel pipes is addressed by connecting rod 23 driving the combined frame 51 to engage with the concrete base plate 1 to complete the assembly. Then, the corrugated web 41 and auxiliary web 42 are installed with the top combined frame 51 using reinforcing bolts 5 and U-shaped frame 52. The concrete top plate 3 is then placed on the two sets of combined frames 51 and fixed with the fixed frame 2 to complete the overall assembly. The buffer pad 54 can buffer the concrete top plate 3 and the combined frame 51, facilitating rapid on-site construction of the beam bridge and improving the overall construction efficiency.

[0050] All standard parts used in this invention can be purchased from the market, and irregular parts can be customized according to the description and drawings. The specific connection methods of each part adopt conventional methods such as bolts, rivets, and welding that are mature in the prior art. The machinery, parts and equipment adopt conventional models in the prior art, and the circuit connection adopts conventional connection methods in the prior art, which will not be described in detail here.

[0051] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A corrugated steel web prestressed composite box girder bridge, comprising a concrete base slab (1), a fixing frame (2) fixedly connected to the top wall of the concrete base slab (1), and a concrete top slab (3) fixedly connected to the top wall of the fixing frame (2), characterized in that, Also includes: The support assembly includes an adjustment component slidably connected to the outer wall of the fixed frame (2), an adjustment screw (21) rotatably connected to the inner wall of the fixed frame (2), and a web portion clamped between the concrete bottom plate (1) and the concrete top plate (3). The adjustment component is symmetrically arranged in two sets about the fixed frame (2), and both sets of the adjustment component cooperate with the adjustment screw (21). The web portion is symmetrically arranged in two sets about the adjustment component for supporting and fixing the corrugated steel web. The web portion includes a support frame (4) rotatably connected to the support ends of two sets of adjustment components, a corrugated web (41) detachably connected to multiple support ends of the support frame (4), and an auxiliary web (42) detachably connected to the side wall of the corrugated web (41) and symmetrically arranged about the support frame (4) via two sets of connecting parts, for supporting the concrete top slab (3) and the concrete bottom slab (1). Both sides of the corrugated web (41) and the auxiliary web (42) are provided with mutually cooperating slots (43), and both the side walls of the corrugated web (41) and the auxiliary web (42) are provided with mutually cooperating connecting holes (44), which cooperate with the connecting part. The adjusting component includes a sliding frame (22) that is slidably connected to the sliding end of the fixed frame (2). Both sides of the sliding frame (22) are rotatably connected to connecting rods (23) that are symmetrically arranged about the fixed frame (2). The ends of two adjacent sets of connecting rods (23) that are away from the sliding frame (22) are connected to a set of support frames (4).

2. The corrugated steel web prestressed composite box girder bridge according to claim 1, characterized in that, The sliding frames (22) contained in the two sets of adjustment components are respectively connected to the two sets of external threads with opposite thread directions on the adjustment screw (21).

3. The corrugated steel web prestressed composite box girder bridge according to claim 1, characterized in that, The outer wall of the fixed frame (2) is also provided with a first limiting plate (24) and a second limiting plate (25) that cooperate with the two sets of sliding frames (22).

4. A corrugated steel web prestressed composite box girder bridge according to claim 1, characterized in that, The top and bottom walls of the support frame (4) are fixedly connected with reinforcing rods (45) corresponding to the auxiliary web plate (42), and the reinforcing rods (45) are snapped into the auxiliary web plate (42) through connectors (46).

5. A corrugated steel web prestressed composite box girder bridge according to claim 1, characterized in that, The connecting part includes a reinforcing bolt (5) detachably connected between the corrugated web (41) and the auxiliary web (42) through a connecting hole (44) and a combination frame (51) connected to the top wall of the concrete base plate (1), and the combination frame (51) is connected to the reinforcing bolt (5) through multiple sets of U-shaped frames (52).

6. A corrugated steel web prestressed composite box girder bridge according to claim 5, characterized in that, The inner wall of the combined frame (51) should be provided with a combination component (53) that cooperates with the corrugated web (41) and the auxiliary web (42).

7. A corrugated steel web prestressed composite box girder bridge according to claim 6, characterized in that, A buffer pad (54) is provided at the junction of the combined frame (51) with the corrugated web (41) and the auxiliary web (42).

8. A corrugated steel web prestressed composite box girder bridge according to claim 3, characterized in that, The fixing frame (2) is fixed to the corrugated web (41) and the auxiliary web (42) by casting, and the corrugated web (41) and the auxiliary web (42) are also provided with uniformly distributed prestressed steel strands (47).

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