Adjustable three-leg support jig for steel structure trestle installation

Abstract

The utility model discloses an adjustable three support leg support jig for steel structure trestle installation relates to the technical field of fabricated steel structure trestle, including the groove frame for supporting trestle lower longitudinal beam, the bottom end of groove frame is rotatively provided with first support leg, second support leg and third support leg, and the bottom end of first support leg, second support leg and third support leg is three -point formula distribution, is provided with steel pull rod between the bottom end of first support leg and second support leg, between the bottom end of first support leg and third support leg, between the bottom end of second support leg and third support leg, the bottom end of first support leg, second support leg and third support leg all are connected with support through fastener. This adjustable three support leg support jig for steel structure trestle installation sets up first support leg, second support leg, third support leg and steel pull rod etc. structure, constructs solid triangle stable structure, improves the anti -tilting, the torsional rigidity and the overall stability of support jig significantly, ensures construction safety.

Description

Technical Field

[0001] This utility model relates to the field of prefabricated steel structure trestle technology, and in particular to an adjustable three-legged support frame for the installation of steel structure trestle. Background Technology

[0002] During the construction and installation of steel structure trestle bridges, especially when located in complex terrain or crossing existing facilities, temporary support frames are often required to support the trestle bridge's main structure as it is hoisted in sections, ensuring accurate positioning and safe construction. Currently, commonly used support methods include welded steel support piers, steel pipe scaffolding systems, and simple double-leg supports. However, these traditional technologies have revealed numerous problems in practical applications.

[0003] First, in terms of structural stability, the common double-leg or single-point support form is essentially a geometrically variable system with poor lateral stiffness and torsional performance. When the trestle is hoisted into place in sections or subjected to wind loads, it is prone to lateral slippage or even overturning, posing a serious safety hazard. This is mainly because its support points form an unstable straight line or planar hinged structure, lacking effective spatial geometric constraints.

[0004] Secondly, in terms of functionality and adaptability, existing supports are mostly rigid welded structures or fixed-height assemblies, whose height is not adjustable or extremely difficult to adjust. They cannot make precise fine-tuning of the trestle's elevation during installation, nor can they effectively compensate for deformation caused by foundation settlement or load changes. At the same time, the top support surface and the bottom foundation surface are usually in rigid contact, which cannot adapt to the unevenness of the foundation or the design slope of the trestle. This leads to uneven stress on the support components, which can easily cause stress concentration at some support points while other points become loose, affecting the overall structural safety.

[0005] Finally, in terms of construction efficiency and economy, the traditional method of fixing supports and trestle structures often adopts on-site welding, which is cumbersome, time-consuming and labor-intensive, and requires high skills from operators. The dismantling work after welding is not only inefficient, but also often damages the support components and the trestle itself, making it impossible to achieve complete recycling and efficient reuse of the support system, thus increasing construction costs.

[0006] Therefore, it is necessary to propose an adjustable three-legged support frame for the installation of steel structure trestle bridges to solve the above problems. Utility Model Content

[0007] The purpose of this utility model is to provide an adjustable three-leg support frame for the installation of steel structure trestle bridges, so as to solve the problems of poor lateral stiffness and torsional performance, non-adjustable or extremely difficult height adjustment, cumbersome operation, time and labor consumption, and high skill requirements for operators.

[0008] To achieve the above objectives, the present invention provides the following technical solution: an adjustable three-leg support frame for the installation of steel structure trestle bridges, comprising a trough frame for supporting the longitudinal beams under the trestle bridge, wherein the bottom end of the trough frame is rotatably provided with a first leg, a second leg and a third leg, and the bottom ends of the first leg, the second leg and the third leg are distributed in a three-point manner.

[0009] Steel tie rods are installed between the bottom ends of the first leg and the second leg, between the bottom ends of the first leg and the third leg, and between the bottom ends of the second leg and the third leg.

[0010] The bottom ends of the first leg, the second leg, and the third leg are all connected to supports by fasteners;

[0011] The trough frame is equipped with a positioning mechanism for clamping and positioning the longitudinal beams under the trestle.

[0012] Preferably, the bottom of the slot frame is fixedly connected to two parallel bottom ear plates, and the top of the third leg is fixedly connected to a side ear plate. The first leg and the side ear plate are installed on one of the bottom ear plates by fasteners, and the second leg and the third leg are installed on the other bottom ear plate by fasteners.

[0013] Preferably, the bottom ends of the first leg, the second leg, and the third leg are all fixedly connected to a connecting plate that mates with the corresponding steel tie rod.

[0014] Preferably, the support includes a circular plate, a vertical lug plate, and a reinforcing rib. The vertical lug plate is fixedly connected to the top of the circular plate and is connected to the first leg, the second leg, or the third leg. The reinforcing rib is fixedly connected between the vertical lug plate and the circular plate.

[0015] Preferably, the slot frame includes a square plate and two side plates, which are respectively fixedly connected to the two sides of the top of the slot frame.

[0016] Preferably, the positioning mechanism includes a set screw and a fixing nut. The fixing nut is fixedly connected to the outer wall of the side plate, and the side plate has circular grooves distributed corresponding to the fixing nut. The fixing nut is threaded with a set screw, and the set screw passes through the circular groove and is pressed into the longitudinal beam under the trestle.

[0017] The technical effects and advantages of this utility model are as follows:

[0018] 1. This utility model, by setting up a first leg, a second leg, a third leg, and a steel tie rod, forms a three-dimensional triangular stable structure, which significantly improves the anti-tilting and anti-torsion ability and overall stability of the support frame, ensuring construction safety;

[0019] 2. By setting up structures such as steel tie rods and bottom ear plates, and utilizing the tension of the steel tie rods, the support height can be conveniently and precisely adjusted within a set range to control the installation elevation and compensate for deformation;

[0020] 3. The bottom ear plate and side ear plate are set to make the top of the first leg, the second leg and the third leg form a whole, ensuring the strength of use, and the tilt angle of the trough frame can also be adjusted, which is suitable for the longitudinal beam under the inclined trestle.

[0021] 4. By setting up a positioning mechanism for quick clamping and positioning, and by using fasteners to connect all connection points, the longitudinal beams under the trestle can be quickly fixed and disassembled without on-site welding, thereby improving installation efficiency and enabling the complete storage and reuse of the support frame, thus reducing costs.

[0022] 5. Both the upper support frame and the lower support have a certain degree of free rotation, which adapts to uneven foundation and trestle slope, ensuring that each leg is evenly stressed and avoiding overloading.

[0023] 6. The combination of all fastener connections and top screw positioning eliminates the need for welding and cutting throughout the process, improving installation and disassembly efficiency. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the adjustable three-leg support frame structure for the installation of steel structure trestle bridges according to this utility model.

[0025] Figure 2 This is a schematic diagram of the square plate and side plate structure of this utility model.

[0026] Figure 3 This is a schematic diagram of the structure of the first leg, the second leg, and the third leg of this utility model.

[0027] Figure 4 This is a schematic diagram of the support and steel tie rod structure of this utility model.

[0028] Figure 5 This is a schematic diagram of the third leg and side ear plate structure of this utility model.

[0029] Figure 6 This is a schematic diagram of the structure of the first and second legs of this utility model.

[0030] Figure 7 This is a schematic diagram of the circular plate, vertical ear plate, and reinforcing rib structure of this utility model.

[0031] In the diagram: 1. Longitudinal beam under the trestle bridge; 2. Channel frame; 3. First leg; 4. Second leg; 5. Third leg; 6. Support; 7. Steel tie rod; 8. Square plate; 9. Side plate; 10. Bottom lug plate; 11. Top screw; 12. Fixing nut; 13. Side lug plate; 14. Connecting plate; 15. Round plate; 16. Vertical lug plate; 17. Reinforcing rib; 18. Fastener. Detailed Implementation

[0032] This utility model provides, for example Figures 1 to 7 The adjustable three-leg support frame for the installation of steel structure trestle bridge shown includes a channel frame 2 for supporting the longitudinal beam 1 under the trestle bridge. The channel frame 2 includes a square plate 8 and two side plates 9. The two side plates 9 are respectively fixedly connected to the two sides of the top of the channel frame 2 to form a U-shaped support structure.

[0033] The trough frame 2 is equipped with a positioning mechanism for clamping and positioning the lower longitudinal beam 1 of the trestle. Multiple positioning mechanisms are evenly distributed on the two side plates 9. Each positioning mechanism includes a set screw 11 and a fixing nut 12. The fixing nut 12 is fixedly connected to the outer wall of the side plate 9, and the side plate 9 has circular grooves corresponding to the fixing nut 12. The fixing nut 12 is threaded with the set screw 11, which passes through the circular groove and engages with the lower longitudinal beam 1 of the trestle. After the lower longitudinal beam 1 of the trestle is placed on the trough frame 2, the set screw 11 is rotated to press and fix the lower longitudinal beam 1 of the trestle.

[0034] The lower part of the trough frame 2 is provided with a first leg 3, a second leg 4, and a third leg 5. The first leg 3, the second leg 4, and the third leg 5 are of the same length. The top of the third leg 5 is fixedly connected to a side lug plate 13 (see reference). Figure 5 The bottom of the slot frame 2 is fixedly connected to two parallel bottom ear plates 10. The first leg 3 and the side ear plate 13 are installed on one of the bottom ear plates 10 by fasteners, including bolts and nuts.

[0035] When the fastener is loosened, the first leg 3 and the side ear plate 13 can rotate around the fastener as an axis, and the third leg 5 rotates synchronously with the side ear plate 13. When the fastener is tightened, the angle between the first leg 3 and the side ear plate 13 is fixed, so that the angle of the third leg 5 is also fixed.

[0036] The second leg 4 and the third leg 5 are mounted on another bottom ear plate 10 by fasteners. When the fasteners are loosened, the second leg 4 and the third leg 5 can rotate around the fasteners as an axis. The third leg 5 rotates synchronously with the side ear plate 13. When the fasteners are tightened, the angle of the second leg 4 and the third leg 5 is fixed, so that the angle of the side ear plate 13 is also fixed.

[0037] The bottom ear plate 10 and side ear plate 13 are designed to form a whole at the top of the first leg 3, the second leg 4 and the third leg 5, ensuring the strength of the structure. The tilt angle of the trough frame 2 can also be adjusted, making it suitable for the longitudinal beam 1 under the inclined trestle bridge.

[0038] When supported, the bottom ends of the first leg 3, the second leg 4, and the third leg 5 are distributed in a three-point manner. In addition, the height of the trough frame 2 can be adjusted by adjusting the tilt angle of the first leg 3, the second leg 4, and the third leg 5, thereby adjusting the support height. For example, when the tilt angle of the first leg 3, the second leg 4, and the third leg 5 becomes smaller, the height of the trough frame 2 is reduced.

[0039] Steel tie rods 7 are provided between the bottom ends of the first leg 3 and the second leg 4, between the bottom ends of the first leg 3 and the third leg 5, and between the bottom ends of the second leg 4 and the third leg 5. Connecting plates 14 that mate with the corresponding steel tie rods 7 are fixedly connected to the bottom ends of the first leg 3, the second leg 4 and the third leg 5.

[0040] The three steel tie rods 7 are arranged in a triangular shape. Utilizing the stability principle of triangles, the stability of the support cooperation between the first leg 3, the second leg 4, and the third leg 5 is ensured. At the same time, the length of the steel tie rods 7 is adjustable, which does not affect the angle adjustment of the first leg 3, the second leg 4, and the third leg 5, thereby adjusting the height of the trough frame 2.

[0041] By setting up the first leg 3, the second leg 4, the third leg 5, and the steel tie rod 7, a three-dimensional triangular stable structure is formed, which significantly improves the anti-tilting and anti-torsion capabilities and overall stability of the support frame, ensuring construction safety.

[0042] By setting up structures such as steel tie rods 7 and bottom ear plates 10, and utilizing the tension of steel tie rods 7, the support height can be conveniently and precisely adjusted within a set range to control the installation elevation and compensate for deformation.

[0043] The bottom ends of the first leg 3, the second leg 4, and the third leg 5 are all provided with supports 6. The supports 6 include a circular plate 15, a vertical lug plate 16, and a reinforcing rib 17. The vertical lug plate 16 is fixedly connected to the top of the circular plate 15. The vertical lug plate 16 is connected to the first leg 3, the second leg 4, or the third leg 5 by fasteners. The reinforcing rib 17 is fixedly connected between the vertical lug plate 16 and the circular plate 15 to increase the strength of the supports 6.

[0044] Fasteners include structures such as bolts and nuts.

[0045] Taking the vertical lug plate 16 and the first support leg 3 as an example, when the fastener is loosened, the vertical lug plate 16 can rotate around the fastener as an axis to adjust the angle of the support 6. When the fastener is tightened, the angle of the vertical lug plate 16 is fixed, which also fixes the angle of the support 6, allowing the circular plate 15 to stably contact the ground and adapt to the unevenness of the ground foundation.

[0046] Both the upper support 2 and the lower support 6 have a certain degree of free rotation function, which adapts to uneven foundation and trestle slope, ensuring that each leg is evenly stressed and avoiding overload.

[0047] By setting up a positioning mechanism for quick clamping and positioning, and by using fasteners to connect all connection points, the longitudinal beam 1 under the trestle can be quickly fixed and disassembled without on-site welding, thereby improving installation efficiency and enabling the complete storage and reuse of the support frame, thus reducing costs.

[0048] This utility model adopts a combination of all fastener connections and top screw 11 positioning, which eliminates the need for welding and cutting throughout the process, thus improving the efficiency of installation and disassembly.

Claims

1. An adjustable three-legged support frame for installing steel structure trestle bridges, comprising a channel frame (2) for supporting the longitudinal beam (1) under the trestle bridge, characterized in that: The bottom end of the slot frame (2) is rotatably provided with a first leg (3), a second leg (4) and a third leg (5), and the bottom ends of the first leg (3), the second leg (4) and the third leg (5) are distributed in a three-point manner; Steel tie rods (7) are provided between the bottom ends of the first leg (3) and the second leg (4), between the bottom ends of the first leg (3) and the third leg (5), and between the bottom ends of the second leg (4) and the third leg (5). The bottom ends of the first leg (3), the second leg (4) and the third leg (5) are all connected to the support (6) by fasteners; The trough frame (2) is equipped with a positioning mechanism for clamping and positioning the longitudinal beam (1) under the trestle.

2. The adjustable three-legged support frame for installing steel structure trestle bridges according to claim 1, characterized in that: The bottom of the slot frame (2) is fixedly connected to two parallel bottom ear plates (10), and the top of the third leg (5) is fixedly connected to a side ear plate (13). The first leg (3) and the side ear plate (13) are installed on one of the bottom ear plates (10) by fasteners, and the second leg (4) and the third leg (5) are installed on the other bottom ear plate (10) by fasteners.

3. The adjustable three-legged support frame for installing steel structure trestle bridges according to claim 1, characterized in that: The bottom ends of the first leg (3), the second leg (4) and the third leg (5) are all fixedly connected to a connecting plate (14) that mates with the corresponding steel tie rod (7).

4. The adjustable three-legged support frame for installing steel structure trestle bridges according to claim 1, characterized in that: The support (6) includes a circular plate (15), a vertical lug plate (16), and a reinforcing rib (17). The vertical lug plate (16) is fixedly connected to the top of the circular plate (15). The vertical lug plate (16) is connected to the first leg (3), the second leg (4), or the third leg (5). The reinforcing rib (17) is fixedly connected between the vertical lug plate (16) and the circular plate (15).

5. The adjustable three-legged support frame for installing steel structure trestle bridges according to claim 1, characterized in that: The slot frame (2) includes a square plate (8) and two side plates (9), which are fixedly connected to the two sides of the top of the slot frame (2).

6. An adjustable three-legged support frame for installing steel structure trestle bridges according to claim 5, characterized in that: The positioning mechanism includes a set screw (11) and a fixing nut (12). The fixing nut (12) is fixedly connected to the outer wall of the side plate (9), and the side plate (9) has circular grooves distributed corresponding to the fixing nut (12). The fixing nut (12) is threaded with a set screw (11), and the set screw (11) passes through the circular groove and is pressed into the longitudinal beam (1) under the trestle.

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