Bridge steel structure modeling positioning jig frame

Abstract

This utility model discloses a bridge steel structure shaping and positioning jig, specifically relating to the field of bridge engineering construction technology. It includes a sliding load-bearing truss, adjustable length connecting rods, universal joints, a height adjustment gearbox, supporting columns, an integral rigid platform, longitudinal grooves, sliding template supports, and flange plate support arms. Two sliding load-bearing trusses are rigidly connected by several adjustable length connecting rods. Each sliding load-bearing truss has a continuous adjusting rack along its longitudinal direction at its top, and a height adjustment gearbox meshes with the rack. The top output end of the height adjustment gearbox is connected to a supporting column. The tops of all the supporting columns collectively support an integral rigid platform, and the integral rigid platform has a longitudinal groove. Several sliding template supports are embedded in the longitudinal groove, and a flange plate support arm is hinged to each sliding template support.

Description

Technical Field

[0001] This utility model relates to the field of bridge engineering construction technology, and more specifically, to a positioning frame for bridge steel structure shaping. Background Technology

[0002] In the construction of urban overpasses and ramp bridges, in order to adapt to the route alignment, cast-in-place continuous box girder structures with gradually changing bridge deck width and beam height are often adopted. For example, the width of the left side of a bridge needs to smoothly change from 29.5 meters to 38.1 meters, while the beam height also changes in a curve. The core challenge in the construction of this type of structure is to achieve the three-dimensional spatial alignment. Existing publication number CN221441308U discloses a pre-assembly positioning jig for steel bridges, comprising four longitudinal steel pipes arranged in a rectangular pattern, with connecting crossbars and diagonal connecting rods between adjacent longitudinal steel pipes. A thickened tube is provided at the top of each longitudinal steel pipe, and an adjustable height support component is provided inside the thickened tube. The height support component includes an adjusting screw, which is movably inserted into the thickened tube, and a positioning nut is threaded to the side of the adjusting screw. A support plate is provided at the top of the adjusting screw. This pre-assembly positioning jig for steel bridges has a simple structure, including a fixed part and a height-adjustable part. The height of the jig can be adjusted according to the support location, facilitating support for different parts of the steel bridge. Furthermore, using a uniform jig structure reduces dimensional accuracy requirements, facilitates standardized manufacturing, reduces work difficulty, and improves work efficiency. It is also convenient to use. The inventors discovered the following problems with the existing technology during the development of this utility model: In traditional bridge construction, the full-span scaffolding method is often used. However, the full-span scaffolding method has significant drawbacks. First, in order to adapt to changes in bridge width, a large number of uprights need to be manually rearranged in different longitudinal sections, making it difficult to ensure the smoothness of the transition. Second, it is difficult to control and accumulate large errors by adjusting thousands of top supports to fit the bottom curve and precamber of the beam. Furthermore, there is a lack of systematic adjustment methods for variable cross-section flanges. Therefore, a bridge steel structure positioning jig is proposed to address the above problems. Utility Model Content

[0003] In order to overcome the above-mentioned defects of the prior art, the present invention provides a bridge steel structure shaping and positioning jig to solve the problems mentioned in the background art.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a bridge steel structure shaping and positioning jig, comprising a sliding load-bearing truss, adjustable length connecting rods, universal joints, a height adjustment gearbox, supporting columns, an integral rigid platform, longitudinal grooves, sliding template supports, and flange plate support arms. Two sliding load-bearing trusses are rigidly connected by several adjustable length connecting rods. Each sliding load-bearing truss has a continuous adjusting rack along its longitudinal direction at its top, and a height adjustment gearbox meshes with the adjusting rack. The top output end of the height adjustment gearbox is connected to a supporting column. The tops of all the supporting columns together support an integral rigid platform, and the integral rigid platform has a longitudinal groove. Several sliding template supports are embedded in the longitudinal groove, and a flange plate support arm is hinged to each sliding template support.

[0005] Preferably, the bottom of the sliding load-bearing truss is equipped with a set of traveling wheels, and the side of the traveling wheels is provided with locking legs, and the bottom of the traveling wheels is provided with a track.

[0006] By adopting the above technical solutions, the frame can move as a whole along the track, facilitating rapid transfer and positioning between bridge spans; the locking outriggers extend and make firm contact with the foundation during operation, providing stable support against slippage and overturning, ensuring construction safety.

[0007] Preferably, the adjustable length connecting rod is a two-way screw structure, with a drive handwheel in the middle, and its two ends are connected to the sliding load-bearing truss through universal joints.

[0008] By adopting the above technical solution, the distance between the two main trusses can be changed synchronously and equally by shaking the drive handwheel, thereby adjusting the working width of the foundation frame, perfectly adapting to the gradual change of bridge deck width. The universal joint connection can compensate for installation and deformation errors, ensuring that the lead screw only bears axial force and the transmission is smooth.

[0009] Preferably, the height adjustment gearbox integrates a self-locking worm gear mechanism, and an input crank is provided on its side.

[0010] By adopting the above technical solution, the worm gear mechanism has a self-locking characteristic, which can reliably maintain the adjusted height. By inputting the crank to drive the gearbox to move along the rack, the top of the support column can form any designed curve, and the beam height change and pre-camber setting can be completed in one go.

[0011] Preferably, the integral rigid platform is an integral component welded from a honeycomb steel frame and a steel plate skin.

[0012] By adopting the above technical solutions, the overall platform has extremely high rigidity, which can evenly distribute the concrete load, ensure the flatness of the box girder bottom plate, and provide a safe working surface for the upper operation.

[0013] Preferably, the sliding template support is fixed at any position in the longitudinal groove by locking bolts.

[0014] By adopting the above technical solution, the longitudinal position of the formwork support can be flexibly adjusted according to the change of the flange cantilever length. The locking bolts can generate huge friction force to firmly lock the support and resist the lateral pressure during concrete pouring.

[0015] Preferably, an angle scale is provided on the hinge shaft between the flange support arm and the sliding template support, and a locking disc with a handle is provided on the side of the angle scale, and the locking disc fixes the angle by the handle.

[0016] By adopting the above technical solution, the design tilt angle of the flange plate can be set and locked intuitively, which is simple to operate and ensures the molding quality.

[0017] The technical effects and advantages of this utility model are as follows: 1. Compared with existing technologies, this bridge steel structure shaping and positioning jig uses a three-level modular adjustment system with adjustable connecting rods to adjust the width, gear racks to adjust the height, and sliding hinge arms to adjust the angle. This system decomposes the complex three-dimensional linear control into three independent and intuitive operation steps, enabling rapid one-time positioning of box girder shapes with varying widths, heights, and angles.

[0018] 2. Compared with existing technologies, this bridge steel structure positioning frame adopts a large modular steel structure, with the main body being a movable and reusable rigid frame. It has the advantages of factory prefabrication, rapid on-site assembly, and overall transportation, which can significantly reduce material waste and achieve green, efficient, and standardized construction. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of this utility model.

[0020] Figure 2 This is a schematic diagram of the structure of this utility model.

[0021] Figure 3 This is a schematic diagram of the structure of this utility model.

[0022] Figure 4 This is a schematic diagram of the structure of this utility model.

[0023] The attached diagram is labeled as follows: 1. Sliding load-bearing truss; 2. Adjustable length connecting rod; 201. Drive handwheel; 202. Universal joint; 3. Adjusting rack; 4. Height adjustment gearbox; 401. Input crank; 5. Support column; 6. Integral rigid platform; 7. Longitudinal slide; 8. Sliding template support; 801. Locking bolt; 9. Flange plate support arm; 901. Angle scale; 902. Locking disc; 10. Traveling wheel set; 11. Locking outrigger; 12. Track. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0025] Example 1 As attached Figures 1 to 4 The bridge steel structure positioning jig shown includes a sliding load-bearing truss 1, adjustable length connecting rods 2, universal joints 3, height adjustment gearbox 4, support columns 5, an integral rigid platform 6, longitudinal grooves 7, sliding template supports 8, and flange plate support arms 9. Its features are: two sliding load-bearing trusses 1 are rigidly connected by several adjustable length connecting rods 2; each sliding load-bearing truss 1 has a continuous adjusting rack 3 along its longitudinal direction at its top; the adjusting rack 3 is meshed with a height adjustment gearbox 4; the top output end of the height adjustment gearbox 4 is connected to a support column 5; the tops of all support columns 5 together support an integral rigid platform 6; the integral rigid platform 6 has longitudinal grooves 7, and several sliding template supports 8 are embedded in the longitudinal grooves 7; each sliding template support 8 is hinged to a flange plate support arm 9.

[0026] During construction, a track 12 is first laid at the bridge site, and two sliding load-bearing trusses 1 are hoisted onto the track and initially connected by adjustable length connecting rods 2. According to the design width of the initial section of the beam to be poured, all adjustable length connecting rods 2 are adjusted synchronously to ensure that the distance between the two main trusses is in place, and the locking legs 11 are lowered and fixed.

[0027] Then, operate the input crank 401 of each height adjustment gearbox 4 to drive it to move along the adjustment rack 3, so that the top surface of all support columns 5 is strictly positioned according to the design elevation curve of the beam bottom. Next, hoist the integral rigid platform 6 to the top of the support column 5 and fix it. Finally, according to the flange plate size, adjust the sliding template support 8 to the corresponding position of the longitudinal slide groove 7 and lock it. Then adjust the flange plate support arm 9 to the design angle and lock it. At this point, the jig has completed the positioning of all box girder shape parameters.

[0028] Example 2 Based on Example 1, the solution in Example 1 will be further described in detail below with reference to the specific working method, such as... Figures 1 to 4 As shown below, see details: In a preferred embodiment, a sliding load-bearing truss 1 is equipped with a set of traveling wheels 10 at its bottom. The side of the traveling wheel set 10 is provided with locking legs 11, and the bottom of the traveling wheel set 10 is provided with a track 12. The sliding load-bearing truss 1 is the main load-bearing frame of the jig, which is made of high-strength steel welded into a triangular lattice truss to provide longitudinal bending stiffness. The traveling wheel set 10 is installed at its bottom so that it can move on the pre-laid track 12. The locking legs 11 are installed on the side of the traveling wheel set 10 and extend out to support the foundation during operation to ensure the stability of the jig.

[0029] In a preferred embodiment, the adjustable length connecting rod 2 is a two-way screw structure, with a drive handwheel 201 in the middle. Its two ends are connected to the sliding load-bearing truss 1 through universal joints 202. The adjustable length connecting rod 2 is the core component for width adjustment. It is a two-way screw structure. The drive handwheel 201 is installed in the middle of the connecting rod. When it is shaken, the connecting parts with opposite threads at both ends can be retracted and extended synchronously. The universal joints 202 are connected between the two ends of the connecting rod and the sliding load-bearing truss 1 to compensate for installation errors and ensure smooth screw transmission.

[0030] In a preferred embodiment, the height-adjusting gearbox 4 integrates a self-locking worm gear mechanism, and has an input handle 401 on its side. The adjusting rack 3 is fixedly installed on the top upper chord of the sliding load-bearing truss 1, providing a continuous longitudinal positioning reference. The height-adjusting gearbox 4 meshes with the rack 3 through its internal worm gear mechanism and has a self-locking function. Operating the input handle 401 can drive the gearbox to move precisely along the rack. The support column 5 is fixed on the top of the gearbox, and its height is determined by the longitudinal position of the gearbox.

[0031] As a preferred embodiment, the integral rigid platform 6 is an integral component welded from a honeycomb steel frame and a steel plate skin. The integral rigid platform 6 is a large welded steel structure composed of a honeycomb frame and a panel, providing a flat and rigid support surface for the bottom plate of the box girder. The longitudinal groove 7 is machined on the edge of the platform and is a continuous T-shaped groove.

[0032] In a preferred embodiment, the sliding template support 8 is fixed at any position in the longitudinal groove 7 by locking bolts 801. The bottom of the sliding template support 8 is provided with a slider that matches the T-slot, allowing it to slide along the groove 7. The locking bolts 801 are horizontally installed on the side of the support, and when tightened, they can press against the side wall of the groove, firmly locking the support.

[0033] In a preferred embodiment, an angle scale 901 is provided on the hinge shaft between the flange plate support arm 9 and the sliding template support 8. A locking disc 902 with a handle is provided on the side of the angle scale, and the locking disc 902 fixes the angle through the handle. The flange plate support arm 9 is hinged to the top of the support by a pin and can rotate freely to set the angle. The angle scale 901 and the locking disc 902 with a handle are installed at the hinge shaft to display and fix the angle of the support arm.

[0034] The working process of this utility model is as follows: First, all large components are prefabricated in the factory. On-site, the measurement and layout are carried out, concrete strip foundations are poured and tracks 12 are laid. Two sliding load-bearing trusses 1, adjustable length connecting rods 2 and height adjustment system are installed in sequence using hoisting equipment. By synchronously shaking all drive handwheels 201, the distance between the two main trusses is adjusted to the design bridge width. Then, each input crank 401 is operated to drive all height adjustment gearboxes 4 to move the support column 5 along the rack to the design elevation position, forming the bottom curve of the beam.

[0035] Then, the integral rigid platform 6 is hoisted to the top of the column and fixed. According to the construction layout, multiple sliding template supports 8 are slid in the longitudinal groove 7 to the design position of each flange plate support point, and locked one by one with locking bolts 801. The design cross slope angle of each flange plate support arm 9 to the section is adjusted and locked by locking plate 902. The three-dimensional coordinates of the frame are fully measured and verified. After acceptance, the installation of box girder reinforcement, formwork and concrete pouring can be carried out.

[0036] Once the concrete reaches its strength and the prestressing is completed, all locking mechanisms are released, the locking legs 11 are retracted, and the frame can be moved as a whole to the next construction section for reuse via the walking wheel set 10. This is the working principle of this type of bridge steel structure positioning frame.

Claims

1. A bridge steel structure shaping and positioning jig, comprising a sliding load-bearing truss (1), an adjustable length connecting rod (2), an adjusting rack (3), a height adjusting gearbox (4), a support column (5), an integral rigid platform (6), a longitudinal slide groove (7), a sliding template support (8), and a flange plate support arm (9), characterized in that: The two sliding load-bearing trusses (1) are rigidly connected by several adjustable length connecting rods (2). Each sliding load-bearing truss (1) has a continuous adjusting rack (3) on its top along the longitudinal direction. The adjusting rack (3) is meshed with a height adjusting gearbox (4). The top output end of the height adjusting gearbox (4) is connected to a support column (5). The tops of all the support columns (5) together support an integral rigid platform (6). The integral rigid platform (6) is provided with a longitudinal sliding groove (7). Several sliding template supports (8) are embedded in the longitudinal sliding groove (7). Each sliding template support (8) is hinged with a flange plate support arm (9).

2. The bridge steel structure shaping and positioning jig according to claim 1, characterized in that: The bottom of the sliding load-bearing truss (1) is equipped with a walking wheel set (10), and the side of the walking wheel set (10) is provided with a locking leg (11), and the bottom of the walking wheel set (10) is provided with a track (12).

3. The bridge steel structure shaping and positioning jig according to claim 1, characterized in that: The adjustable length connecting rod (2) is a two-way screw structure, with a drive handwheel (201) in the middle, and its two ends are connected to the sliding load-bearing truss (1) through universal joints (202).

4. The bridge steel structure shaping and positioning jig according to claim 1, characterized in that: The height adjustment gearbox (4) integrates a self-locking worm gear mechanism, and an input crank (401) is provided on its side.

5. A bridge steel structure shaping and positioning jig as described in claim 1, characterized in that: The integral rigid platform (6) is an integral component welded from a honeycomb steel frame and a steel plate skin.

6. The bridge steel structure shaping and positioning jig according to claim 1, characterized in that: The sliding template support (8) is fixed at any position on the longitudinal slide groove (7) by locking bolts (801).

7. A bridge steel structure shaping and positioning jig as described in claim 1, characterized in that: An angle scale (901) is provided on the hinge shaft between the flange support arm (9) and the sliding template support (8), and a locking plate (902) with a handle is provided on the side of the angle scale (901), and the locking plate (902) fixes the angle by the handle.

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