Positioning device for large-span hybrid beam construction

Abstract

The utility model provides a positioning device for large-span hybrid beam construction, which comprises a fixing rod, the fixing rod is fixed in a preformed hole in a prefabricated bridge deck, and a positioning mechanism is mounted in the fixing rod; the positioning mechanism comprises a fixing block, the interior of the fixing rod is slidably connected with the fixing block, the surface of the fixing block is provided with a laser lamp and a camera, the bottom end of the fixing block is provided with a plurality of elastic plates, the side walls of the elastic plates are fan blades, and an elastic rod is installed between every two adjacent elastic plates; the elastic plate and the elastic rod are connected into the fixing rod in a sliding mode, and the shear key is located in the elastic plate. The positioning device for construction of the large-span hybrid beam has the advantages that alignment between the shear keys and the bridge deck is facilitated, and installation efficiency is improved.

Description

Technical Field

[0001] This utility model relates to the field of hybrid beam construction technology, and in particular to a positioning device for the construction of large-span hybrid beams. Background Technology

[0002] Steel-concrete composite beams are a new type of structural design developed based on steel and concrete structures. They primarily rely on shear connectors between the steel beams and concrete flanges to resist uplift and relative slippage at the interface, ensuring they function as a unified whole. Compared to reinforced concrete beams, steel-concrete composite beams offer advantages such as reduced structural weight, decreased seismic load, smaller cross-sectional dimensions, increased usable space, reduced formwork requirements, shorter construction time, and increased beam ductility. Compared to steel beams, they reduce steel consumption, increase stiffness, enhance stability and overall integrity, and improve fire resistance and durability.

[0003] The span of the large-span hybrid beam is over 20 meters. The prefabricated bridge deck is heavy and bulky. During the hoisting process, it is necessary to align and splice the prefabricated bridge deck with the shear keys on the surface of the steel beam. However, due to the large weight and volume of the bridge deck, it is difficult to fine-tune the position of the bridge deck. Moreover, the bridge deck is easily affected by the wind and sways during the hoisting process. It is difficult to align the bridge deck with the shear keys. Collisions may occur during the docking, which makes it inconvenient to dock the bridge deck with the steel beam.

[0004] Therefore, it is necessary to provide a new positioning device for the construction of large-span hybrid beams to solve the above problems. Utility Model Content

[0005] The technical problem solved by this utility model is to provide a positioning device for the construction of large-span hybrid beams that facilitates the alignment between shear keys and bridge decks and speeds up installation.

[0006] To solve the above-mentioned technical problems, the positioning device for the construction of large-span hybrid beams provided by this utility model includes: a fixed rod, which is fixed in a reserved hole inside the precast bridge deck, and a positioning mechanism is installed inside the fixed rod; the positioning mechanism includes a fixed block, which is slidably connected inside the fixed rod; a laser light and a camera are mounted on the surface of the fixed block; multiple elastic plates with fan-shaped sidewalls are installed at the bottom end of the fixed block; elastic rods are installed between adjacent elastic plates; the elastic plates and the elastic rods are slidably connected inside the fixed rod, and a shear key is located inside the elastic plate.

[0007] Preferably, the precast bridge deck is placed on the surface of the steel beam, and a plurality of shear keys are welded to the top surface of the steel beam, with the shear keys slidably connected to the interior of the reserved holes.

[0008] Preferably, a positioning hole is provided at the center of the surface of the shear key, and the laser light is installed at the center of the surface of the fixing block, with the laser light aligned with the positioning hole.

[0009] Preferably, a fixing plate is fixedly connected to the side wall of the fixing rod, and the fixing plate is fixed to the side wall of the precast bridge panel by bolts.

[0010] Preferably, a battery is installed inside the fixing block, and the battery is electrically connected to the laser light and the camera.

[0011] Preferably, a sliding rod is fixedly connected to the top of the fixing block, and the sliding rod is slidably connected to the fixing rod; a spring is fitted on the side wall of the sliding rod, and the two ends of the spring respectively abut against the side wall of the fixing block and the fixing rod.

[0012] Compared with related technologies, the positioning device for construction of large-span hybrid beams provided by this utility model has the following beneficial effects:

[0013] This utility model provides a positioning device for the construction of a large-span hybrid beam. During the hoisting of the precast bridge deck, as the precast bridge deck moves above the steel beam, the operation of the camera on the surface of the fixing block, through the image captured by the camera, adjusts the position of the precast bridge deck, aligning the elastic plate with the shear key, and lowers the precast bridge deck so that the shear key enters the interior of the elastic plate, thereby initially positioning the precast bridge deck. A laser light is installed on the surface of the fixing block, and the laser beam emitted by the laser light is positioned within a pre-drilled hole on the same side of the precast bridge deck. The fixing rods are triangularly distributed inside the pre-drilled hole, and the top surface of the shear key has a positioning hole. The camera... The laser beam is observed to determine the positional relationship between the laser beam and the positioning hole, and whether the reserved hole is aligned with the shear key. When all the laser beams irradiate into the interior of the positioning hole, the reserved hole is aligned with the shear key, and then the precast bridge panel is lowered. During the lowering process of the precast bridge panel, the elastic plate contacts and is compressed against the surface of the steel beam, causing the elastic plate and the elastic rod to gradually deform and contract into the interior of the fixing rod. Under the action of the spring, the elastic plate is always in contact with the surface of the steel beam, and the squeezing force and friction between the elastic plate and the steel beam gradually increase. The elastic plate increases the stability of the precast bridge panel during the lowering process, reduces the swaying of the precast bridge panel, and improves the installation efficiency. Attached Figure Description

[0014] Figure 1 A schematic diagram of a preferred embodiment of the positioning device for construction of large-span hybrid beams provided by this utility model;

[0015] Figure 2 for Figure 1 The diagram shows an enlarged view of the structure at point A.

[0016] Figure 3 for Figure 2 The diagram shows an enlarged view of the structure at point B.

[0017] Figure 4 for Figure 3 The top view of the fixed block structure shown;

[0018] Figure 5 for Figure 1 The image shows a top view of the prefabricated bridge deck structure.

[0019] The following are the labels in the diagram: 1. Steel beam, 11. Shear key, 12. Positioning hole, 2. Precast bridge deck, 21. Reserved hole, 3. Fixing rod, 31. Fixing plate, 4. Positioning mechanism, 41. Sliding rod, 42. Spring, 43. Elastic plate, 44. Elastic rod, 45. Fixing block, 46. Battery, 47. Camera, 48. Laser light. Detailed Implementation

[0020] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0021] Please see Figures 1 to 5 , Figure 1 A schematic diagram of a preferred embodiment of the positioning device for construction of large-span hybrid beams provided by this utility model; Figure 2 for Figure 1 The diagram shows an enlarged view of the structure at point A. Figure 3 for Figure 2 The diagram shows an enlarged view of the structure at point B. Figure 4 for Figure 3 The top view of the fixed block structure shown; Figure 5 for Figure 1 The diagram shows a top view of the precast bridge deck structure. The positioning device for the construction of the large-span hybrid beam includes a fixing rod 3, which is fixed in a pre-drilled hole 21 inside the precast bridge deck 2. The fixing rods 3 are arranged in a triangular pattern inside the pre-drilled hole 21 on the same side of the precast bridge deck 2. When positioning the precast bridge deck 2 using a laser beam, the laser beam is also arranged in a triangular pattern. By observing whether the multiple laser beams are aligned with the positioning hole 12, it is determined whether the precast bridge deck 2 is aligned with the steel beam 2.

[0022] The fixing rod 3 is internally equipped with a positioning mechanism 4. The positioning mechanism 4 includes a fixing block 45, which is slidably connected to the fixing rod 3. The fixing block 45 has a laser lamp 48 and a camera 47 on its surface. Multiple elastic plates 43 with fan-shaped sidewalls are installed at the bottom of the fixing block 45. Elastic rods 44 are installed between adjacent elastic plates 43. The elastic plates 43 and elastic rods 44 are slidably connected to the interior of the fixing rod 3, and the shear key 11 is located inside the elastic plate 43. When hoisting the precast bridge panel 2, the position of the precast bridge panel 1 is adjusted by using the image captured by the camera 47 to align the elastic plate 43 with the shear key 11. The positional relationship between the laser beam and the positioning hole 21 is observed by the camera 47 to determine whether the reserved hole 21 is aligned with the shear key 11.

[0023] The precast bridge deck 2 is placed on the surface of the steel beam 1. Multiple shear keys 11 are welded to the top surface of the steel beam 1, and the shear keys 11 are slidably connected to the interior of the reserved hole 21. In order to facilitate the shear keys 11 to enter the interior of the reserved hole 21, the precast bridge deck 2 and the steel beam 1 are spliced ​​together.

[0024] The shear key 11 has a positioning hole 12 at the center of its surface, and the laser light 48 is installed at the center of the surface of the fixing block 45, with the laser light 48 aligned with the positioning hole 12. This is to facilitate the observation of the position between the laser beam and the positioning hole 12 to determine whether the precast bridge deck 2 and the steel beam 1 are aligned.

[0025] The fixing rod 3 is fixedly connected to the side wall of the fixing plate 31, and the fixing plate 31 is fixed to the side wall of the prefabricated bridge panel 2 by bolts, so as to facilitate fixing the fixing rod 3 inside the reserved hole 21.

[0026] A battery 46 is installed inside the fixing block 45, and the battery 46 is electrically connected to the laser light 48 and the camera 47 in order to facilitate the battery 46 to provide power for the operation of the laser light 48 and the camera 47.

[0027] The top of the fixing block 45 is fixedly connected to the sliding rod 41, and the sliding rod 41 is slidably connected to the fixing rod 3. The side wall of the sliding rod 41 is fitted with a spring 42, and the two ends of the spring 42 respectively abut against the side wall of the fixing block 45 and the fixing rod 3. The diameter of the fixing block 45 is equal to the inner diameter of the fixing rod 3. In order to facilitate the spring 42 to press the fixing block 45 and the elastic plate 43 downward, so that the elastic plate 43 extends out from the inside of the prefabricated bridge panel 2, so that the shear key 11 can enter between the multiple elastic plates 43.

[0028] The working principle of the positioning device for large-span hybrid beam construction provided by this utility model is as follows: Before hoisting, multiple fixing rods 3 are inserted into the pre-drilled holes 21, and fixing plates 31 are installed on the surface of the precast bridge deck 2 using bolts to fix the fixing rods 3. During the installation of the fixing rods 3, the fixing rods 3 are arranged in a triangular pattern inside the pre-drilled holes 21 on the same side of the precast bridge deck 2, thereby facilitating the positioning of the precast bridge deck 2. During the hoisting of the precast bridge deck 2, the precast bridge deck 2 moves above the steel beam 1. The operation of the camera 48 on the surface of the fixing block 45, through the image captured by the camera 48, adjusts the position of the precast bridge deck 2, aligning the elastic plate 43 with the shear key 11. The precast bridge deck 2 is then lowered, allowing the shear key 11 to enter the interior of the elastic plate 43, thus initially positioning the precast bridge deck 2. A laser light 48 is installed on the surface of the fixing block 45, emitting a laser beam. The top surface of the shear key 11 has a positioning hole 12. The camera 47 observes the positional relationship between the laser beam and the positioning hole 12, determining whether the reserved hole 21 is aligned with the shear key 11. 1. Alignment: After all the laser beams irradiate into the interior of the positioning hole 12, the reserved hole 12 is aligned with the shear key 11, and then the prefabricated bridge panel 2 is lowered. During the lowering process of the prefabricated bridge panel 2, the elastic plate 43 contacts the surface of the steel beam 1 and is compressed, causing the elastic plate 43 and the elastic rod 44 to gradually deform and contract into the interior of the fixing rod 3. Under the action of the spring 42, the elastic plate 43 is always in contact with the surface of the steel beam 1, and the squeezing force and friction between the elastic plate 43 and the steel beam 1 gradually increase. The elastic plate 43 increases the stability of the prefabricated bridge panel 1 during the lowering process, reduces the degree of shaking of the prefabricated bridge panel 1, and facilitates the placement of the prefabricated bridge panel 2 on the surface of the steel beam 1.

[0029] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the content of this utility model specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A positioning device for construction of large-span hybrid beams, characterized in that, include: The fixing rod (3) is fixed in the reserved hole (21) inside the precast bridge panel (2). The fixing rod (3) is triangularly distributed inside the reserved hole (21) on the same side of the precast bridge panel (2). The fixing rod (3) is installed with a positioning mechanism (4). The positioning mechanism (4) includes a fixed block (45), which is slidably connected to the fixed rod (3). The fixed block (45) has a laser lamp (48) and a camera (47) on its surface. Multiple elastic plates (43) with fan-shaped sidewalls are installed at the bottom of the fixed block (45). Elastic rods (44) are installed between adjacent elastic plates (43). The elastic plates (43) and the elastic rods (44) are slidably connected to the interior of the fixed rod (3), and the shear key (11) is located inside the elastic plate (43).

2. The positioning device for construction of large-span hybrid beams according to claim 1, characterized in that, The precast bridge deck (2) is placed on the surface of the steel beam (1), and a plurality of shear keys (11) are welded to the top surface of the steel beam (1), and the shear keys (11) are slidably connected to the interior of the reserved hole (21).

3. The positioning device for construction of large-span hybrid beams according to claim 2, characterized in that, The shear key (11) has a positioning hole (12) at the center of its surface, and the laser lamp (48) is installed at the center of the surface of the fixing block (45), and the laser lamp (48) is aligned with the positioning hole (12).

4. The positioning device for construction of large-span hybrid beams according to claim 1, characterized in that, The fixing rod (3) is fixedly connected to the side wall of the fixing plate (31), and the fixing plate (31) is fixed to the side wall of the precast bridge panel (2) by bolts.

5. The positioning device for construction of large-span hybrid beams according to claim 1, characterized in that, The battery (46) is installed inside the fixing block (45), and the battery (46) is electrically connected to the laser light (48) and the camera (47).

6. The positioning device for construction of large-span hybrid beams according to claim 1, characterized in that, The top of the fixed block (45) is fixedly connected to the slide rod (41), and the slide rod (41) is slidably connected to the fixed rod (3); the side wall of the slide rod (41) is fitted with a spring (42), and the two ends of the spring (42) abut against the side wall of the fixed block (45) and the fixed rod (3) respectively.

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