Support for large-span cast-in-situ bridge construction

Abstract

The utility model discloses a kind of support for large-span cast-in-place bridge construction, it is related to bridge construction technical field.The utility model includes first crossbeam, and the first crossbeam side is provided with second crossbeam;The first crossbeam side is provided with clamping mechanism, clamping mechanism includes the clamping groove in the first crossbeam side, the clamping plate fixedly connected in the second crossbeam side, the first limiting pin of screw connection in the first crossbeam bottom;The first crossbeam bottom is provided with extension fine adjustment mechanism, and extension fine adjustment mechanism includes the first stand column set in the first crossbeam bottom.The utility model is adjusted flexibly by the cooperation of clamping mechanism and extension fine adjustment mechanism, support can be according to the actual span and height demand of bridge flexible adjustment.The splicing design of clamping plate and clamping groove expands support width, and the number of superimposed second stand column and the fixed position of adjusting second limiting pin realize the height adjustment, adapt to different construction scene.

Description

Technical Field

[0001] This utility model belongs to the field of bridge construction technology, and in particular relates to a support for the construction of large-span cast-in-place bridges. Background Technology

[0002] Long-span cast-in-place bridges refer to bridges with large spans, whose structures are mainly constructed using cast-in-place concrete. A key characteristic of cast-in-place concrete bridges is that the concrete is poured directly on-site, rather than assembled from prefabricated components. Therefore, they can be flexibly adjusted according to design requirements and possess good integrity and durability. To ensure stability and safety during construction, scaffolding is used for the construction of long-span cast-in-place bridges.

[0003] A utility model patent application with publication number CN217974068U discloses a beam-column support for cast-in-place construction of long-span bridges, including a support plate. Three support members are provided at the bottom of the support plate, two of which are located on both sides of the support plate, and the third support member is located in the middle of the support plate. Each support member includes a first connecting plate, a first baffle, and a second baffle. When the support needs to be dismantled, it can be removed simply by striking the baffles. The rotatable second connecting plate and pressure column facilitate the movement of the two baffles by personnel.

[0004] While the aforementioned technical solution achieves rapid dismantling of the support frame through components such as the support plate, the first baffle, and the second baffle, these components are all integral sheet materials. This makes it difficult to flexibly adjust them according to the specific span, height, and load requirements of the bridge, necessitating customized design during construction. This not only increases costs but also affects construction efficiency. Therefore, we provide a support frame for the construction of large-span cast-in-place bridges to address the aforementioned problems. Utility Model Content

[0005] The purpose of this utility model is to provide a support for the construction of large-span cast-in-place bridges. Through the cooperation of a snap-fit ​​mechanism and an extension fine-tuning mechanism, it solves the problem that the existing support cannot be flexibly adjusted according to the specific conditions of the bridge during use.

[0006] To solve the above-mentioned technical problems, this utility model is achieved through the following technical solution.

[0007] This utility model relates to a support structure for the construction of a long-span cast-in-place bridge, comprising a first crossbeam, with a second crossbeam disposed on one side of the first crossbeam; a locking mechanism is disposed on one side of the first crossbeam, the locking mechanism comprising a slot formed on one side of the first crossbeam, a locking plate fixedly connected to one side of the second crossbeam, and a first limiting pin threadedly connected to the bottom of the first crossbeam; an extension and fine-tuning mechanism is disposed at the bottom of the first crossbeam, the extension and fine-tuning mechanism comprising a first column disposed at the bottom of the first crossbeam, a second column disposed at the top of the first column, positioning grooves formed at the tops of the first column and the second column respectively, and second limiting pins threadedly connected to one side of the first column and the second column respectively.

[0008] The present invention is further configured such that the snap-fit ​​mechanism includes a first pin hole opened at the bottom of the first crossbeam and the snap-fit ​​plate, and the first limiting pin is threadedly connected to the snap-fit ​​plate.

[0009] The present invention is further configured such that the extension fine-tuning mechanism includes a positioning rod fixedly connected to the bottom of the first crossbeam and the bottom of the second column respectively, and a second pin hole opened on one side of the positioning groove, the first column, the second column and the positioning rod.

[0010] The present invention is further configured such that a horizontal plate is provided at the bottom of the first crossbeam, and a threaded rod is threadedly connected to one side of the horizontal plate.

[0011] The present invention is further configured such that a guide rod is provided on one side of the threaded rod, and a movable plate is sleeved on the surface of the guide rod.

[0012] The present invention is further configured such that a triangular support frame is provided on one side of the movable plate, and a fixed plate is fixedly connected to one side of the triangular support frame.

[0013] The present invention is further configured such that the first column and the second column are in contact, and the second column and the first beam are in contact.

[0014] The present invention has the following beneficial effects.

[0015] 1. This utility model, through the cooperation of a snap-fit ​​mechanism and an extension fine-tuning mechanism, allows the support frame to be flexibly adjusted according to the actual span and height requirements of the bridge. The splicing design of the snap-fit ​​plate and the snap-fit ​​groove expands the width of the support frame, while the number of stacked second columns and the adjustment of the fixed position of the second limit pin enable height adjustment, adapting to different construction scenarios.

[0016] 2. This utility model dynamically adjusts the clamping state between the movable plate and the triangular support frame through the linkage design of the triangular support frame and the threaded rod, significantly improving the overall stability of the bracket. The precise alignment of the positioning rod and the positioning groove ensures vertical load-bearing strength, and the modular design simplifies the assembly and disassembly process, reduces customization requirements, lowers construction costs, and improves construction efficiency.

[0017] Of course, any product implementing this utility model does not necessarily need to achieve all of the advantages described above at the same time. Attached Figure Description

[0018] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below.

[0019] Figure 1 This is a three-dimensional diagram of a support structure used in the construction of a large-span cast-in-place bridge.

[0020] Figure 2 This is a cross-sectional view of the first crossbeam in a support structure used for the construction of a long-span cast-in-place bridge.

[0021] Figure 3 This is a diagram showing the disassembly state of the second crossbeam in a support structure used for the construction of a long-span cast-in-place bridge.

[0022] Figure 4 This is a diagram showing the dismantling state of the first column in a support structure used for the construction of a long-span cast-in-place bridge.

[0023] Figure 5 This is a diagram showing the dismantling state of the second column in a support structure used for the construction of a long-span cast-in-place bridge.

[0024] Figure 6 This is a bottom view of a partial structure in a support system used for the construction of a long-span cast-in-place bridge.

[0025] In the attached diagram: 1. First crossbeam; 2. Second crossbeam; 3. Slot; 4. Card plate; 5. First limiting pin; 6. First column; 7. Second column; 8. Positioning slot; 9. Second limiting pin; 10. First pin hole; 11. Positioning rod; 12. Second pin hole; 13. Cross plate; 14. Threaded rod; 15. Guide rod; 16. Movable plate; 17. Triangular support frame; 18. Fixed plate. Detailed Implementation

[0026] The technical solutions of the present utility model will be described below with reference to the accompanying drawings. The described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0027] Example 1

[0028] Please see Figures 1-6This utility model is a support for the construction of a large-span cast-in-place bridge, including a first crossbeam 1, a second crossbeam 2 provided on one side of the first crossbeam 1, and a slot 3 also provided on the side of the second crossbeam 2 away from the first crossbeam 1. A clamping plate 4 is also fixedly connected to the side of the first crossbeam 1 away from the second crossbeam 2. The first crossbeam 1 and the second crossbeam 2 can be spliced ​​together through the first pin hole 10, the clamping plate 4, and the first limiting pin 5. The first crossbeam 1 and the second crossbeam 2 are the main load-bearing components of the support, used to support the concrete load of the cast-in-place bridge. Through the splicing design, the width of the support can be flexibly adjusted according to the bridge span. A snap-fit ​​mechanism is provided on one side of the first crossbeam 1. The snap-fit ​​mechanism includes a slot 3 opened on one side of the first crossbeam 1 and a snap plate 4 fixedly connected to one side of the second crossbeam 2. The snap plate 4 and the slot 3 enable the quick splicing of the first crossbeam 1 and the second crossbeam 2, which facilitates the expansion of the support span. A first limiting pin 5 is threadedly connected to the bottom of the first crossbeam 1. The first limiting pin 5 is fixed to the snap plate 4 and the slot 3 by threaded connection to ensure the stability of the crossbeam after splicing and prevent lateral displacement. An extension fine-tuning mechanism is provided at the bottom of the first crossbeam 1. The extension fine-tuning mechanism includes a first column 6 set at the bottom of the first crossbeam 1 and a second column 7 set at the top of the first column 6. The height of the support is adjusted by stacking the number of second columns 7 to adapt to the construction needs of different bridges. Positioning slots 8 are opened at the top of the first column 6 and the second column 7 respectively, and second limiting pins 9 are threadedly connected to one side of the first column 6 and the second column 7 respectively.

[0029] Example 2

[0030] Please see Figures 1-6Based on embodiment 1, the snap-fit ​​mechanism further includes a first pin hole 10 at the bottom of the first crossbeam 1 and the snap plate 4, and a first limiting pin 5 threadedly connected to the snap plate 4. The extension fine-tuning mechanism also includes positioning rods 11 fixedly connected to the bottom of the first crossbeam 1 and the bottom of the second column 7, respectively. The positioning groove 8 is adapted to the size of the positioning rod 11, and the positioning rod 11 and the positioning groove 8 are precisely aligned at the connection position to ensure vertical load-bearing strength. There are three second pin holes 12 on one side inside the positioning groove 8, on one side of the first column 6, the second column 7 and the positioning rod 11, and they are evenly distributed vertically. The height is fine-tuned by multiple sets of second pin holes 12. A cross plate 13 is provided at the bottom of the first crossbeam 1, and a threaded rod 14 is threadedly connected to one side of the cross plate 13. The threaded rod 14 drives the movable plate 16 to move by rotation, adjusting the tightness of the triangular support frame 17 and enhancing the overall stability of the support. A guide rod 15 is provided on one side of the threaded rod 14. 5. The top is fixedly connected to the horizontal plate 13. The threaded rod 14 is rotatably connected to the movable plate 16 near the movable plate 16 via a bearing. The movable plate 16 is sleeved on the surface of the guide rod 15. The guide rod 15 provides a linear moving track for the movable plate 16 to ensure a smooth adjustment process. A triangular support frame 17 is provided on one side of the movable plate 16. The movable plate 16 and the triangular support frame 17 are in contact. The movable plate 16 transmits the thrust of the threaded rod 14 to the triangular support frame 17 to achieve dynamic reinforcement. The triangular support frame 17 enhances the strength of the support and improves its stability. A fixed plate 18 is fixedly connected to one side of the triangular support frame 17. The first horizontal beam 1 and the second column 7 are both fixedly connected to the horizontal plate 13. The first column 6 and the second column 7 are both fixedly connected to the fixed plate 18. The first column 6 and the second column 7 are in contact with each other. The second column 7 is in contact with the first horizontal beam 1. The first horizontal beam 1 and the second horizontal beam 2 have the same structure. The bottom of the second horizontal beam 2 has the same structure as the bottom of the first horizontal beam 1.

[0031] The working principle of this utility model is as follows: the clamping plate 4 of the second crossbeam 2 is inserted into the clamping groove 3 of the first crossbeam 1 and fixed by the first limiting pin 5, realizing the rapid splicing of the lateral support, thereby flexibly adjusting the span of the support to adapt to the bridge width. The overall height of the support is adjusted by stacking the number of second columns 7.

[0032] After the positioning rod 11 is inserted into the positioning slot 8, it is fixed with the second limiting pin 9. Fine adjustments are made by selecting the positions of the second pin holes 12 at different heights to ensure the longitudinal support connection of the bracket is stable. Rotating the threaded rod 14 pushes the movable plate 16 to move along the guide rod 15, so that the triangular support frame 17 is always tightly pressed against the bracket structure, forming dynamic support and enhancing overall stability. The bracket, through the coordinated work of snap-fit, threaded connection and positioning rod 11, forms a stable load-bearing system that meets the load and precision requirements of large-span cast-in-place bridge construction. Through modular design and multi-level adjustment mechanism, the problem of insufficient flexibility of traditional brackets is solved, while taking into account strength and construction convenience, making it suitable for complex and ever-changing bridge construction environments.

[0033] The foregoing description only illustrates certain exemplary embodiments of the present invention. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A support frame for the construction of a long-span cast-in-place bridge, comprising a first crossbeam (1), characterized in that: A second crossbeam (2) is provided on one side of the first crossbeam (1); A snap-fit ​​mechanism is provided on one side of the first crossbeam (1). The snap-fit ​​mechanism includes a slot (3) opened on one side of the first crossbeam (1), a snap plate (4) fixedly connected to one side of the second crossbeam (2), and a first limiting pin (5) threadedly connected to the bottom of the first crossbeam (1). The bottom of the first crossbeam (1) is provided with an extension fine-tuning mechanism, which includes a first column (6) at the bottom of the first crossbeam (1), a second column (7) at the top of the first column (6), positioning grooves (8) respectively opened at the top of the first column (6) and the second column (7), and second limiting pins (9) respectively threaded to one side of the first column (6) and the second column (7).

2. The support frame for the construction of a long-span cast-in-place bridge according to claim 1, characterized in that: The snap-fit ​​mechanism further includes a first pin hole (10) at the bottom of the first crossbeam (1) and the snap plate (4), and the first limiting pin (5) is threadedly connected to the snap plate (4).

3. The support frame for the construction of a long-span cast-in-place bridge according to claim 1, characterized in that: The extension fine-tuning mechanism also includes a positioning rod (11) fixedly connected to the bottom of the first crossbeam (1) and the bottom of the second column (7), and a second pin hole (12) opened on one side of the positioning groove (8), the first column (6), the second column (7) and the positioning rod (11).

4. The support frame for the construction of a long-span cast-in-place bridge according to claim 1, characterized in that: The bottom of the first crossbeam (1) is provided with a cross plate (13), and a threaded rod (14) is threadedly connected to one side of the cross plate (13).

5. The support frame for construction of a long-span cast-in-place bridge according to claim 4, characterized in that: A guide rod (15) is provided on one side of the threaded rod (14), and a movable plate (16) is sleeved on the surface of the guide rod (15).

6. The support frame for construction of a long-span cast-in-place bridge according to claim 5, characterized in that: A triangular support frame (17) is provided on one side of the movable plate (16), and a fixed plate (18) is fixedly connected to one side of the triangular support frame (17).

7. The support frame for the construction of a long-span cast-in-place bridge according to claim 1, characterized in that: The first column (6) is in contact with the second column (7), and the second column (7) is in contact with the first beam (1).

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