A main longitudinal beam extension structure

Abstract

The utility model relates to a main longitudinal beam extension structure relates to bridge construction technical field, a main longitudinal beam extension structure, it includes extension beam, extension beam includes with the first end plate of main longitudinal beam butt joint, first end plate extends to the both sides along the width direction of extension beam and forms the first connecting plate, main longitudinal beam includes with the second end plate of extension beam butt joint, second end plate extends to the both sides along the width direction of main longitudinal beam and forms the second connecting plate, first connecting plate is provided with a plurality of first through -hole, second connecting plate is provided with a plurality of second through -hole with first through -hole one -to -one correspondence, first connecting plate and second connecting plate can be connected and fixed through the bolt of first through -hole, second through -hole, this main longitudinal beam extension structure has carried out the optimization to the existing connecting mode, makes the bolt along the length direction of extension beam and connects, makes its stress become the tensile force along the axial direction to improve the connecting strength, simultaneously, the bolt does not need to cross extension beam, greatly simplifies the installation operation.

Description

Technical Field

[0001] In the field of bridge construction technology, this utility model relates to a main longitudinal beam extension structure. Background Technology

[0002] The cantilever casting method is a construction method for bridges that uses a mobile formwork as a working platform to symmetrically cast concrete beams in segments on both sides of the pier, applying prestress segment by segment to form a continuous beam structure. This method requires first erecting the formwork on the completed No. 1 block, and then completing the concrete pouring on the formwork system. The extended main longitudinal beam structure is located at the tail end of the main longitudinal beam, which shifts the overall center of gravity of the formwork rearward, improving its overall overturning resistance.

[0003] Patent 202211294918.2 discloses a main longitudinal beam extension structure, which uses a square connecting plate to connect the extension beam and the main longitudinal beam from the side. This method has the following problems: First, the screws on the connecting plate are set along the width direction of the extension beam and are subject to radial shear force, which can easily cause the screws to deform; Second, the screws need to penetrate the entire extension beam during installation, that is, through the side plates on both sides of the extension beam, which is not only difficult to align, but also requires operation from both sides of the extension beam at the same time, making the installation process very inconvenient; Third, the split design of the connecting plate makes it easy for the connecting plate to be lost during transportation. Utility Model Content

[0004] The purpose of this utility model is to provide a main longitudinal beam extension structure, which has a novel structure and is easy to operate. It improves and optimizes the shortcomings of the extension beam in the prior art, and enhances the mechanical strength and ease of installation.

[0005] The embodiments of this utility model are implemented as follows: A main longitudinal beam extension structure includes an extension beam, the extension beam including a first end plate for docking with the main longitudinal beam, the first end plate extending laterally along the width direction of the extension beam to form a first connecting plate; the main longitudinal beam including a second end plate for docking with the extension beam, the second end plate extending laterally along the width direction of the main longitudinal beam to form a second connecting plate; the first connecting plate is provided with a plurality of first through holes, the second connecting plate is provided with a plurality of second through holes corresponding one-to-one with the first through holes, and the first connecting plate and the second connecting plate can be connected and fixed by bolts passing through the first through holes and the second through holes.

[0006] Furthermore, in other preferred embodiments of this utility model, a plurality of first reinforcing plates are provided on the side of the first connecting plate facing away from the main longitudinal beam. The first reinforcing plates are horizontally arranged and connect the first connecting plate and the side wall of the extension beam. The plurality of first reinforcing plates are spaced apart in the vertical direction.

[0007] Furthermore, in other preferred embodiments of this utility model, a plurality of second reinforcing plates are provided on the side of the second connecting plate facing away from the extension beam. The second reinforcing plates are horizontally arranged and connect the second connecting plate and the side wall of the main longitudinal beam. The plurality of second reinforcing plates are spaced apart in the vertical direction.

[0008] Furthermore, in other preferred embodiments of this utility model, the first connecting plate and the second connecting plate are respectively disposed near the top of the extension beam and the main longitudinal beam, and the height of the first connecting plate and the second connecting plate is 1 / 2 to 2 / 3 of the extension beam.

[0009] Furthermore, in other preferred embodiments of the present invention, a first top fixing seat is provided at the top of the extension beam, the first top fixing seat having a plug portion disposed along the length direction of the extension beam and extending toward the direction of the main longitudinal beam; a second top fixing seat is provided at the top of the main longitudinal beam, the end of the second top fixing seat facing the extension beam having a slot for accommodating the plug portion.

[0010] Furthermore, in other preferred embodiments of the present invention, the plug portion has a first pin hole extending through its width direction, and the second top fixing seat has a second pin hole extending through its width direction. The plug portion can be connected to the second top fixing seat by a pin passing through the first pin hole and the second pin hole.

[0011] Furthermore, in other preferred embodiments of this utility model, the plug portion is composed of two flat plates arranged along the length direction of the extension beam and parallel to each other. The two flat plates are connected by a plurality of first vertical connecting plates, which are spaced apart along the length direction of the plug portion.

[0012] Furthermore, in other preferred embodiments of the present invention, the extension beam includes a pair of sidewalls located on both sides of its length direction, and a plurality of second vertical connecting plates are provided between the pair of sidewalls. The second vertical connecting plates are arranged along the width direction of the extension beam, and the plurality of second vertical connecting plates are spaced apart along the length direction of the extension beam.

[0013] Furthermore, in other preferred embodiments of this utility model, the second vertical connecting plate is disposed close to the first end plate.

[0014] Furthermore, in other preferred embodiments of this utility model, a track is provided at the bottom of the side wall panel for the rear anchor trolley to pass through.

[0015] The beneficial effects of this utility model embodiment are: This utility model embodiment provides a main longitudinal beam extension structure, which includes an extension beam. The extension beam includes a first end plate for docking with the main longitudinal beam, and the first end plate extends to both sides along the width direction of the extension beam to form a first connecting plate. The main longitudinal beam includes a second end plate for docking with the extension beam, and the second end plate extends to both sides along the width direction of the main longitudinal beam to form a second connecting plate. The first connecting plate is provided with a plurality of first through holes, and the second connecting plate is provided with a plurality of second through holes corresponding one-to-one with the first through holes. The first connecting plate and the second connecting plate can be connected and fixed by bolts passing through the first through holes and the second through holes. This main longitudinal beam extension structure optimizes the existing connection method, so that the bolts are connected along the length direction of the extension beam, so that the force is changed to axial tensile force, thereby improving the connection strength. At the same time, the bolts do not need to pass through the extension beam, which greatly simplifies the installation operation. Attached Figure Description

[0016] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 A schematic diagram of an extension beam of a main longitudinal beam extension structure provided in an embodiment of this utility model; Figure 2 A schematic diagram of the tail of the main longitudinal beam in a main longitudinal beam extension structure provided in an embodiment of this utility model; Figure 3 This is a cross-sectional view of the extension beam of a main longitudinal beam extension structure provided in an embodiment of the present utility model.

[0018] Icons: 100 - Main longitudinal beam extension structure; 110 - Extension beam; 111 - First end plate; 112 - First connecting plate; 113 - First through hole; 114 - First reinforcing plate; 115 - Track; 116 - First top fixing seat; 117 - Plug part; 1171 - First vertical connecting plate; 118 - First pin hole; 119 - Side wall plate; 1191 - Second vertical connecting plate; 120 - Main longitudinal beam; 121 - Second end plate; 122 - Second connecting plate; 123 - Second through hole; 124 - Second reinforcing plate; 125 - Second top fixing seat; 126 - Slot; 127 - Second pin hole. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this utility model, not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model. Therefore, the following detailed description of the embodiments of this utility model provided in the accompanying drawings is not intended to limit the scope of the claimed utility model, but merely represents selected embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0020] In the description of this utility model, 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", "counterclockwise", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to 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 of this utility model.

[0021] Furthermore, 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 technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0022] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.

[0023] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature. Example

[0024] This embodiment provides a main longitudinal beam 120 extension structure 100, referring to... Figure 1 and Figure 2 As shown, it includes an extension beam 110, which includes a first end plate 111 for docking with a main longitudinal beam 120. The first end plate 111 extends to both sides along the width direction of the extension beam 110 to form a first connecting plate 112. The main longitudinal beam 120 includes a second end plate 121 for docking with the extension beam 110. The second end plate 121 extends to both sides along the width direction of the main longitudinal beam 120 to form a second connecting plate 122. The first connecting plate 112 is provided with a plurality of first through holes 113, and the second connecting plate 122 is provided with a plurality of second through holes 123 corresponding one-to-one with the first through holes 113. The first connecting plate 112 and the second connecting plate 122 can be connected and fixed by bolts passing through the first through holes 113 and the second through holes 123.

[0025] The extension structure 100 of the main longitudinal beam 120 optimizes the existing connection method by connecting bolts along the length of the extension beam 110, transforming the force it bears into an axial tensile force. Since the tensile strength of bolts is significantly higher than their bending strength, changing the direction of force improves connection strength and stability. Furthermore, in existing technologies, bolts need to penetrate the extension beam 110, making alignment difficult and requiring bolt insertion on one side and nut installation on the other, which is inconvenient. In this embodiment, the installation method eliminates alignment difficulties and allows bolt installation on one side of the extension beam 110 simply by standing on that side, making the operation much more convenient.

[0026] Furthermore, referring to Figure 1 and Figure 2As shown, a plurality of first reinforcing plates 114 are provided on the side of the first connecting plate 112 facing away from the main longitudinal beam 120. The first reinforcing plates 114 are horizontally arranged and connect the first connecting plate 112 and the side wall of the extension beam 110. The plurality of first reinforcing plates 114 are spaced apart in the vertical direction. Similarly, a plurality of second reinforcing plates 124 are provided on the side of the second connecting plate 122 facing away from the extension beam 110. The second reinforcing plates 124 are horizontally arranged and connect the second connecting plate 122 and the side wall of the main longitudinal beam 120. The plurality of second reinforcing plates 124 are spaced apart in the vertical direction. The first reinforcing plates 114 and the second reinforcing plates 124 can form a stable triangular connection, further improving the strength of the first connecting plate 112 and the second connecting plate 122.

[0027] Furthermore, the first connecting plate 112 and the second connecting plate 122 are respectively positioned near the top of the extension beam 110 and the main longitudinal beam 120, with the height of the first connecting plate 112 and the second connecting plate 122 being 1 / 2 to 2 / 3 of the length of the extension beam 110. According to the stress analysis, the tail end of the main longitudinal beam 120 tends to rise upwards, and the stress at the connection between the main longitudinal beam 120 and the extension beam 110 is concentrated at its top. Therefore, placing the first connecting plate 112 and the second connecting plate 122 at the top is sufficient to meet the connection strength requirements. At the same time, the bottom of the side wall plate 119 is provided with a track 115 for the rear anchor trolley to pass through. Placing the first connecting plate 112 and the second connecting plate 122 at the top allows space for the rear anchor trolley at the bottom to pass through.

[0028] The extension beam 110 has a first top fixing seat 116 at its top, which has a plug portion 117 extending along the length of the extension beam 110 and toward the main longitudinal beam 120. The main longitudinal beam 120 has a second top fixing seat 125 at its top, with a slot 126 formed at one end of the second top fixing seat 125 facing the extension beam 110 to accommodate the plug portion 117. When the extension beam 110 and the main longitudinal beam 120 are joined, the plug portion 117 is inserted into the slot 126 to complete the top fixing. In addition, the plug portion 117 has a first pin hole 118 extending along its width, and the second top fixing seat 125 has a second pin hole 127 extending along its width. The plug portion 117 can be connected to the second top fixing seat 125 by a pin passing through the first pin hole 118 and the second pin hole 127.

[0029] Furthermore, the plug portion 117 consists of two parallel flat plates arranged along the length of the extension beam 110. The two flat plates are connected by a plurality of first vertical connecting plates 1171, which are spaced apart along the length of the plug portion 117. The first vertical connecting plates 1171 can improve the strength of the plug portion 117 and enhance the connection stability.

[0030] Reference Figure 1 and Figure 3 As shown, the extension beam 110 includes a pair of sidewall plates 119 located on both sides of its length direction. A plurality of second vertical connecting plates 1191 are disposed between the pair of sidewall plates 119. The second vertical connecting plates 1191 are arranged along the width direction of the extension beam 110, and the plurality of second vertical connecting plates 1191 are spaced apart along the length direction of the extension beam 110. The second vertical connecting plates 1191 can improve the mechanical strength of the extension beam 110. Optionally, the second vertical connecting plates 1191 are disposed close to the first end plate 111; this arrangement can strengthen the connection and improve the connection stability.

[0031] In summary, this utility model embodiment provides a main longitudinal beam 120 extension structure 100, which includes an extension beam 110. The extension beam 110 includes a first end plate 111 for docking with the main longitudinal beam 120. The first end plate 111 extends to both sides along the width direction of the extension beam 110 to form a first connecting plate 112. The main longitudinal beam 120 includes a second end plate 121 for docking with the extension beam 110. The second end plate 121 extends to both sides along the width direction of the main longitudinal beam 120 to form a second connecting plate 122. The first connecting plate 112 is provided with a plurality of first through holes 113, and the second connecting plate 122 is provided with a plurality of second through holes 123 corresponding one-to-one with the first through holes 113. The first connecting plate 112 and the second connecting plate 122 can be connected and fixed by bolts passing through the first through holes 113 and the second through holes 123. The extension structure 100 of the main longitudinal beam 120 optimizes the existing connection method by connecting the bolts along the length of the extension beam 110, thus changing the force to an axial tensile force and improving the connection strength. At the same time, the bolts do not need to cross the extension beam 110, greatly simplifying the installation operation.

[0032] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A main longitudinal beam extension structure, characterized in that, The system includes an extension beam, which includes a first end plate for connecting with a main longitudinal beam. The first end plate extends laterally along the width direction of the extension beam to form a first connecting plate. The main longitudinal beam includes a second end plate for connecting with the extension beam. The second end plate extends laterally along the width direction of the main longitudinal beam to form a second connecting plate. The first connecting plate is provided with a plurality of first through holes, and the second connecting plate is provided with a plurality of second through holes corresponding one-to-one with the first through holes. The first connecting plate and the second connecting plate can be connected and fixed by bolts passing through the first through holes and the second through holes.

2. The main longitudinal beam extension structure according to claim 1, characterized in that, The first connecting plate has multiple first reinforcing plates on the side facing away from the main longitudinal beam. The first reinforcing plates are horizontally arranged and connect the first connecting plate and the side wall of the extension beam. The multiple first reinforcing plates are spaced apart in the vertical direction.

3. The main longitudinal beam extension structure according to claim 2, characterized in that, The second connecting plate has multiple second reinforcing plates on the side facing away from the extension beam. The second reinforcing plates are horizontally arranged and connect the second connecting plate and the side wall of the main longitudinal beam. The multiple second reinforcing plates are spaced apart in the vertical direction.

4. The main longitudinal beam extension structure according to claim 3, characterized in that, The first connecting plate and the second connecting plate are respectively disposed near the top of the extension beam and the main longitudinal beam, and the height of the first connecting plate and the second connecting plate is 1 / 2 to 2 / 3 of the height of the extension beam.

5. The main longitudinal beam extension structure according to claim 4, characterized in that, The top of the extension beam is provided with a first top fixing seat, the first top fixing seat having a plug portion that is disposed along the length direction of the extension beam and extends toward the direction of the main longitudinal beam; the top of the main longitudinal beam is provided with a second top fixing seat, the end of the second top fixing seat facing the extension beam having a slot for accommodating the plug portion.

6. The main longitudinal beam extension structure according to claim 5, characterized in that, The plug portion has a first pin hole extending through its width, and the second top mounting base has a second pin hole extending through its width. The plug portion can be connected to the second top mounting base by a pin passing through the first pin hole and the second pin hole.

7. The main longitudinal beam extension structure according to claim 6, characterized in that, The plug portion consists of two parallel flat plates arranged along the length of the extension beam. The two flat plates are connected by a plurality of first vertical connecting plates, which are spaced apart along the length of the plug portion.

8. The main longitudinal beam extension structure according to claim 7, characterized in that, The extension beam includes a pair of sidewalls located on both sides of its length direction, and a plurality of second vertical connecting plates are provided between the pair of sidewalls. The second vertical connecting plates are arranged along the width direction of the extension beam, and the plurality of second vertical connecting plates are spaced apart along the length direction of the extension beam.

9. The main longitudinal beam extension structure according to claim 8, characterized in that, The second vertical connecting plate is positioned close to the first end plate.

10. The main longitudinal beam extension structure according to claim 9, characterized in that, The bottom of the side wall panel is provided with a track for the rear anchor trolley to pass through.

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