Supporting device based on pre-lifting steel-concrete composite beam falling system conversion

Abstract

The utility model relates to a supporting device based on pre-lifting steel-concrete composite beam falling system conversion, which comprises a central cavity column, the top side of the central cavity column is connected with an upper supporting plate, and the bottom side of the central cavity column is connected with a lower supporting plate. The utility model relates to the technical field of steel-concrete composite beam pre-lifting supports. According to the supporting device based on pre-lifting steel-concrete composite beam falling system conversion, a plurality of supporting devices can be rapidly stacked together, meanwhile, two adjacent supporting devices can be rapidly positioned, the using and installing efficiency, safety and stability of the multiple supporting devices are improved, and the using and installing efficiency of the multiple supporting devices is improved. Safety risks of slippage, inclination, distortion and instability of the steel box girder in the construction process are reduced, the multi-span single-width whole-connection steel box girder can be pre-lifted and supported, effective control over the bridge forming linear elevation of the steel-concrete composite girder is ensured, the purpose of applying pre-pressure to the hogging moment area of the pier top of the steel-concrete composite girder is achieved, and the construction efficiency is improved. And the effect of improving the overall construction efficiency is achieved.

Description

Technical Field

[0001] This utility model relates to the technical field of pre-lifted support for steel-concrete composite beams, and in particular to a support device based on the conversion of a pre-lifted steel-concrete composite beam lowering system. Background Technology

[0002] The steel box girder installation adopts a pre-lifting construction process supported by steel lattice column brackets. After the steel box girder bridge deck concrete is constructed, the steel-concrete composite beam is lowered onto the permanent supports to complete the conversion of the steel-concrete composite beam system. During this period, temporary support devices are generally used to support the bottom of the steel box girder so that permanent supports can be set below the steel box girder.

[0003] In existing technologies, the commonly used support devices for the conversion of steel box girder or concrete continuous beam systems are mainly temporary supports made of sand cylinders (sand boxes) and temporary supports made of sulfur mortar. Their application is limited to situations where the pre-elevation height of the box girder is close to the elevation of the permanent supports, resulting in almost zero safety risk during the conversion of the box girder system. Because the pre-elevation height of the steel box girder is significantly higher than the elevation of the permanent supports, the uniformity, symmetry, and safety stability of the falling displacement are difficult to control when using commonly used temporary supports made of sand cylinders (sand boxes) and temporary supports made of sulfur mortar for system conversion. This can easily lead to box girder instability, torsional deformation, failure to meet the design elevation in the completed bridge alignment, and difficulty in achieving the design requirements for pre-stressing in the negative bending moment zone at the box girder pier top. The construction safety risks are significant, and the overall system is quite heavy, making its use time-consuming and labor-intensive, thus affecting the efficiency of the pre-elevation and falling conversion of the steel box girder system. Utility Model Content

[0004] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide a support device based on the conversion of the pre-raised steel-concrete composite beam lowering system, so as to solve the technical problems mentioned in the background art.

[0005] The above-mentioned technical objective of this utility model is achieved through the following technical solution:

[0006] A support device based on the conversion of a pre-raised steel-concrete composite beam lowering system includes a central cavity column. An upper support plate is connected to the top side of the central cavity column, and a lower support plate is connected to the bottom side of the central cavity column. A first positioning hole is provided at each of the four corners of the top side of the upper support plate, and four second positioning holes are provided at each of the four corners of the top side of the lower support plate. The positions of the first and second positioning holes that are close to each other correspond to each other. A locking member is provided between the first and second positioning holes, and a reinforcing member is provided on the outer periphery of the central cavity column.

[0007] In a preferred embodiment, the present invention can be further configured such that the reinforcing member includes a plurality of reinforcing ribs, and the plurality of reinforcing ribs are arranged in a ring array and connected to the outer periphery of the central cavity column.

[0008] In a preferred embodiment, the present invention can be further configured such that: a positioning plate is provided below two adjacent sides of the upper support plate, the positioning plate is connected to the corresponding reinforcing rib, and a connecting plate is bolted to both positioning plates.

[0009] In a preferred embodiment, the present invention can be further configured such that: the locking member includes a lower locking pin and an upper locking pin, the lower locking pin is disposed above the second positioning hole, the lower locking pin is rotatably connected to the lower support plate, the upper locking pin is slidably connected to the first positioning hole, and a stud is connected to the bottom end of the upper locking pin, the stud is inserted into the lower locking pin and threadedly connected to the lower locking pin.

[0010] In a preferred embodiment, the present invention can be further configured such that: the top end of the upper locking pin extends above the upper support plate and is arc-shaped, and the bottom end of the lower locking pin has an inwardly concave arc groove corresponding to the top end of the upper locking pin.

[0011] In a preferred embodiment, the present invention can be further configured such that: sprockets are embedded at the bottom of the outer periphery of the four lower locking pins, and the sprockets are fixedly connected to the lower locking pins, and the outer periphery of the four sprockets engages with a chain.

[0012] In summary, this utility model has at least one of the following beneficial technical effects:

[0013] 1. This support device based on the conversion of the pre-lifted steel-concrete composite beam lowering system can quickly stack multiple support devices together during use, and can also quickly position two adjacent support devices, improving the efficiency and safety stability of the installation of multiple support devices. It reduces the safety risks of slippage, tilting, twisting and instability of steel box girders during construction, and can pre-lift and support multi-span single-span integrated steel box girders, ensuring effective control of the bridge alignment and elevation of the steel-concrete composite beam, so as to achieve the purpose of applying pre-stress to the negative bending moment area at the top of the steel-concrete composite beam pier, thereby improving the overall construction efficiency.

[0014] 2. The support device based on the conversion of the pre-raised steel-concrete composite beam drop beam system has a number of reinforcing ribs, which can assist the support of the central cavity column, improve the support rigidity of the central cavity column, and further support the upper and lower support plates, thereby improving the stability of the upper and lower support plates when supported.

[0015] 3. This is a support device based on the conversion of a pre-raised steel-concrete composite beam drop system. Two adjacent support devices are connected by a connecting plate. The two ends of the connecting plate are respectively connected to the corresponding positioning plates on the two adjacent support devices, thereby further improving the stability of the support device during use. After multiple support devices are installed, they form a whole, thereby improving the stability when supporting the steel box girder.

[0016] 4. The support device based on the conversion of the pre-raised steel-concrete composite beam lowering system has an arc-shaped top end of the locking pin. Therefore, when the locking pin abuts against the corresponding second positioning hole flare, the arc-shaped sidewall of the locking pin can be used to rub against the sidewall of the second positioning hole flare, so that the locking pin can automatically find and insert into the corresponding second positioning hole, thereby improving the efficiency of the two support devices to find and position, and avoiding the angular deviation that would affect the efficiency of the stacking and fixing of the two support devices.

[0017] 5. This is a support device based on the conversion of a pre-raised steel-concrete composite beam lowering system. The sprocket is fixedly connected to the bottom of the outer periphery of the lower locking pin. It can pull the chain to rotate, so that the chain drives the four sprockets to rotate at the same time. This allows the four upper locking pins to move up and down simultaneously. When two support devices are stacked, the four upper locking pins can be quickly inserted into the corresponding second positioning holes, thereby achieving the effect of rapid positioning and locking. 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. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the overall structure of a support device based on the conversion of a pre-raised steel-concrete composite beam lowering system according to the present invention.

[0020] Figure 2 This is a schematic diagram of the positioning plate of a support device for the conversion of a pre-raised steel-concrete composite beam lowering system according to the present invention.

[0021] Figure 3 This is a schematic diagram of the locking component structure of a support device based on the conversion of a pre-raised steel-concrete composite beam lowering system according to this utility model.

[0022] In the diagram, 1. Central cavity column; 2. Upper support plate; 3. Lower support plate; 4. First positioning hole; 5. Second positioning hole; 6. Locking component; 7. Reinforcing component; 8. Reinforcing rib; 9. Positioning plate; 10. Connecting plate; 11. Lower locking pin; 12. Upper locking pin; 13. Stud; 14. Concave arc groove; 15. Sprocket; 16. Chain. Detailed Implementation

[0023] The present invention will be further described in detail below with reference to the accompanying drawings.

[0024] Example:

[0025] Reference Figures 1-2 This utility model discloses a support device based on the conversion of a pre-raised steel-concrete composite beam lowering system, including a central cavity column 1. The top side of the central cavity column 1 is connected to an upper support plate 2, and the bottom side of the central cavity column 1 is connected to a lower support plate 3. The four corners of the top side of the upper support plate 2 are provided with first positioning holes 4, and the four corners of the top side of the lower support plate 3 are provided with four second positioning holes 5. The positions of the first positioning holes 4 and the second positioning holes 5 that are close to each other correspond to each other. A locking member 6 is provided between the first positioning holes 4 and the second positioning holes 5. A reinforcing member 7 is provided on the outer periphery of the central cavity column 1.

[0026] In this embodiment, reference Figure 1 Multiple support devices can be stacked together, like building blocks, to pre-raise and support the steel box girder. During stacking, the corresponding upper support plate 2 and lower support plate 3 are stacked close together, and the first positioning hole 4 on the upper support plate 2 is aligned with the second positioning hole 5. They are then fixed with bolts to prevent lateral displacement during the support operation, which would affect the construction progress. The locking component 6 can directly lock adjacent upper support plates 2 and lower support plates 3, eliminating the need for bolt fixing and improving installation efficiency. In addition, the reinforcing component 7 allows two support devices on the same plane to be connected to each other, thereby improving the overall stability of the support device.

[0027] In a further preferred embodiment of this utility model, such as Figure 1 As shown, the reinforcing member 7 includes a number of reinforcing ribs 8, which are arranged in a ring array and connected to the outer periphery of the central cavity column 1.

[0028] In this embodiment, reference Figure 1 The reinforcing ribs 8 are numerous, which can assist in supporting the central cavity column 1, improve the supporting rigidity of the central cavity column 1, and further support the upper support plate 2 and the lower support plate 3, thereby improving the stability of the upper support plate 2 and the lower support plate 3 when supported.

[0029] In a further preferred embodiment of this utility model, such as Figure 1-2 As shown, positioning plates 9 are provided below the two adjacent sides of the upper support plate 2. The positioning plates 9 are connected to the corresponding reinforcing ribs 8. Connecting plates 10 are bolted to both positioning plates 9.

[0030] In this embodiment, reference Figure 2 There are two positioning plates 9, one on each of the two adjacent sides of the upper support plate 2, so that the support device needs to be arranged in a rectangular pattern when providing support. After the rectangular arrangement, refer to... Figure 1 The connecting plate 10 connects two adjacent support devices. The two ends of the connecting plate 10 are connected to the corresponding positioning plates 9 on the two adjacent support devices, thereby further improving the stability of the support device during use and allowing multiple support devices to form a whole after installation, thus improving the stability of the steel box girder support.

[0031] In a further preferred embodiment of this utility model, such as Figure 2-3 As shown, the locking component 6 includes a lower locking pin 11 and an upper locking pin 12. The lower locking pin 11 is disposed above the second positioning hole 5 and is rotatably connected to the lower support plate 3. The upper locking pin 12 is slidably connected in the first positioning hole 4. A stud 13 is connected to the bottom end of the upper locking pin 12. The stud 13 is inserted into the lower locking pin 11 and threadedly connected to the lower locking pin 11.

[0032] In this embodiment, reference Figure 2 The upper locking pin 12 and the lower locking pin 11 are connected in a sliding manner. The upper locking pin 12 is slidably connected to the corresponding first positioning hole 4, and the lower locking pin 11 is rotatably connected to the lower support plate 3. Their axes are collinear with the axis of the corresponding second positioning hole 5, and the bottom of the second screw hole is flared. Therefore, when the two support devices are stacked, the flared design of the second positioning hole 5 allows the upper locking pin 12 to quickly locate and insert into the second positioning hole 5, thus achieving a rapid positioning effect. (Reference) Figure 3 The stud 13 is inserted into the corresponding second positioning hole 5. Then the lower locking pin 11 is rotated, and the lower locking pin 11 is threadedly connected to the stud 13. This causes the upper locking pin 12 to slide upward and then be inserted into the corresponding second positioning hole 5, thereby completing the stacking and positioning of the two support devices to support the steel box girder.

[0033] In a further preferred embodiment of this utility model, such as Figure 3As shown, the top end of the upper locking pin 12 extends above the upper support plate 2 and is arranged in an arc shape, and the bottom end of the lower locking pin 11 is provided with an inwardly concave arc groove 14 corresponding to the top end of the upper locking pin 12.

[0034] In this embodiment, reference Figure 3 The locking pin 12 has an arc-shaped top. When the locking pin 12 abuts against the flared position of the corresponding second positioning hole 5, the arc-shaped sidewall of the locking pin 12 can rub against the sidewall of the flared position of the second positioning hole 5, so that the locking pin 12 can automatically find and insert into the corresponding second positioning hole 5, thereby improving the efficiency of the two support devices in finding and positioning, and avoiding angular deviation that would affect the efficiency of stacking and fixing the two support devices.

[0035] The concave arc groove 14 at the bottom of the lower locking pin 11 allows the upper locking pin 12 to be inserted, thereby further positioning the upper locking pin 12 and quickly knowing that the upper locking pin 12 has been inserted into the designated position, thus improving the efficiency of installation.

[0036] In a further preferred embodiment of this utility model, such as Figure 2 As shown, sprockets 15 are embedded in the bottom of the outer periphery of the four lower locking pins 11, and the sprockets 15 are fixedly connected to the lower locking pins 11. The outer periphery of the four sprockets 15 are engaged with a chain 16.

[0037] In this embodiment, reference Figure 2 The sprocket 15 is fixedly connected to the bottom outer periphery of the lower locking pin 11. It can pull the chain 16 to rotate, so that the chain 16 drives the four sprockets 15 to rotate at the same time. This allows the four upper locking pins 12 to move up and down simultaneously. When the two support devices are stacked, the four upper locking pins 12 can be quickly inserted into the corresponding second positioning holes 5, thereby achieving the effect of quick positioning and locking.

[0038] The embodiments described herein are preferred embodiments of this utility model and are not intended to limit the scope of protection of this utility model. Therefore, all equivalent changes made to the structure, shape, and principle of this utility model should be included within the scope of protection of this utility model.

Claims

1. A support device based on the conversion of a pre-raised steel-concrete composite beam lowering system, comprising a central cavity column (1), characterized in that, The top side of the central cavity column (1) is connected to an upper support plate (2), and the bottom side of the central cavity column (1) is connected to a lower support plate (3). The four corners of the top side of the upper support plate (2) are provided with first positioning holes (4), and the four corners of the top side of the lower support plate (3) are provided with four second positioning holes (5). The positions of the first positioning holes (4) and the second positioning holes (5) that are close to each other correspond to each other. A locking member (6) is provided between the first positioning hole (4) and the second positioning hole (5). A reinforcing member (7) is provided on the outer periphery of the central cavity column (1).

2. The support device based on the conversion of a pre-raised steel-concrete composite beam lowering system according to claim 1, characterized in that, The reinforcing member (7) includes a number of reinforcing ribs (8), which are arranged in a ring array and connected to the outer periphery of the central cavity column (1).

3. The support device based on the conversion of a pre-raised steel-concrete composite beam lowering system according to claim 2, characterized in that, The upper support plate (2) has a positioning plate (9) below the two adjacent sides. The positioning plate (9) is connected to the corresponding reinforcing rib (8). Both positioning plates (9) are connected to a connecting plate (10) by bolts.

4. The support device based on the conversion of a pre-raised steel-concrete composite beam lowering system according to claim 3, characterized in that, The locking component (6) includes a lower locking pin (11) and an upper locking pin (12). The lower locking pin (11) is located above the second positioning hole (5) and is rotatably connected to the lower support plate (3). The upper locking pin (12) is slidably connected to the first positioning hole (4). A stud (13) is connected to the bottom end of the upper locking pin (12). The stud (13) is inserted into the lower locking pin (11) and threadedly connected to the lower locking pin (11).

5. A support device based on the conversion of a pre-raised steel-concrete composite beam lowering system according to claim 4, characterized in that, The top end of the upper locking pin (12) extends above the upper support plate (2) and is arc-shaped. The bottom end of the lower locking pin (11) is provided with an inwardly concave arc groove (14) corresponding to the top end of the upper locking pin (12).

6. A support device for the conversion of a pre-raised steel-concrete composite beam lowering system according to claim 5, characterized in that, Sprockets (15) are embedded in the bottom of the outer periphery of the four lower locking pins (11), and the sprockets (15) are fixedly connected to the lower locking pins (11). The outer periphery of the four sprockets (15) are engaged with a chain (16).

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