Steel truss bottom chord pushing stress reinforcing device

Abstract

The utility model discloses a kind of steel truss bottom chord bar pushing stress reinforcing device, including reinforcing device, the reinforcing device includes ship plate, the bottom corresponding side outer wall of the ship plate is equipped with the pushing beam of equal distance distribution by welding fixed, the top outer wall of the pushing beam is equipped with the locating column of equal distance distribution by welding fixed, two the bottom corresponding side outer wall of the ship plate is equipped with locating plate by welding fixed.The utility model passes through outer hexagonal sleeve rotation inner thread lifting sleeve, by adjusting outer thread support rod ascending or descending to adjust the height of inner thread lifting sleeve, the size of pushing force can be controlled, pushing beam is evenly transmitted to crossbeam on pushing force, by crossbeam to transmit to longitudinal beam and bottom chord bar on pushing force, by equal distance distribution lifting sleeve support crossbeam, form multiple point support, and the support degree of each point can be adjusted, realize the pushing stress of steel truss bottom chord bar and realize accurate compensation.

Description

Technical Field

[0001] This utility model relates to the technical field of truss reinforcement auxiliary equipment, specifically to a device for reinforcing the jacking force of the lower chord of a steel truss. Background Technology

[0002] A steel truss bridge is a truss structure made of steel. Its core consists of an upper chord, a lower chord, and web members (including vertical and diagonal members) connected by nodes to form a stable spatial system. This structure utilizes the high strength, uniform material properties, good plasticity and toughness, and strong weldability of steel. Through the mechanical properties of the members under axial tension or compression, it achieves efficient load transfer and structural stability.

[0003] During long-term use, steel trusses inevitably suffer from natural environmental erosion and repeated loads. In terms of natural aging, the steel surface rusts, and over time, the rust gradually penetrates into the steel, weakening the effective cross-sectional area and reducing its load-bearing capacity. At the same time, temperature changes caused by diurnal temperature differences and seasonal alternations cause the steel to expand and contract with temperature. Long-term repeated temperature stress can lead to micro-cracks in the steel, damaging the structural integrity of the steel truss and reducing its supporting strength.

[0004] When the strength of a steel truss decreases to a certain level, the safety of the bridge will be seriously threatened. Excessive deformation may lead to unevenness of the bridge deck, affecting the comfort and safety of vehicle travel. In this case, it is necessary to reinforce the weakened steel truss by jacking it up.

[0005] Traditional reinforcement support systems are mostly single-point supports or fixed support points with difficult-to-adjust support strength. The complex stress changes of steel trusses during the jacking process mean that the support force required to withstand different jacking forces at different locations can easily result in useless support jacking action and poor reinforcement effect on the rigid truss. Utility Model Content

[0006] The purpose of this invention is to provide a device for reinforcing the jacking force of the lower chord of a steel truss to address the aforementioned shortcomings in the technology.

[0007] To achieve the above objectives, this utility model provides the following technical solution: a steel truss lower chord push-resistance reinforcement device, comprising a reinforcement device, the reinforcement device comprising a ship plate, wherein push beams are fixedly welded to the outer wall of the corresponding side of the bottom of the ship plate, and positioning columns are fixedly welded to the outer wall of the top of the push beams, wherein positioning plates are fixedly welded to the outer wall of the corresponding side of the bottom of the two ship plates, and a vertically upward external threaded support rod is fixedly welded to the outer wall of the top of the positioning column, wherein an internal threaded lifting sleeve is screwed to the outer wall of the top of the external threaded support rod, and an external hexagonal sleeve is welded to the outer wall of the bottom of the internal threaded lifting sleeve.

[0008] Preferably, in use, the two ship plates are respectively fixed to the steel truss beam by bolts.

[0009] Preferably, the steel truss includes two upper chords and two lower chords, with the two lower chords respectively located at the bottom of the two upper chords. The feature is that: a crossbeam is fixedly welded to the corresponding outer wall between the two lower chords, and a ship plate is provided on the outer wall of the two lower chords that are far apart from each other. The jacking beam is located directly below the crossbeam.

[0010] Preferably, two longitudinal beams are snapped onto the top outer wall of the crossbeam, and the snapping parts of the crossbeam and the longitudinal beams are fixed by welding.

[0011] Preferably, the outer walls of the corresponding sides of the top of the two upper chords are fixedly provided with upper horizontal longitudinal couplings by welding, and a positioning ring is fixedly provided on the outer wall of the top end of the internal thread lifting sleeve, and a rubber pad is fixedly provided on the inner wall of the positioning ring.

[0012] Preferably, the top of the two upper chords is provided with an upper horizontal longitudinal joint on one side of the corresponding outer wall, and the bottom of the two lower chords is provided with a lower horizontal longitudinal joint on one side of the corresponding outer wall.

[0013] Preferably, the upper chord and the lower chord are connected by welding with vertically downwardly distributed bars at equal intervals. The bottom outer wall of the upper chord is also fixed with a downwardly inclined bar by welding, and the bottom outer wall of the inclined bar is fixed with the top outer wall of the lower chord by welding. The outer walls of both ends of the upper chord are fixed with downwardly inclined bridge frames by welding, and the other outer wall of the bridge frame is fixed with the top outer wall of the lower chord by welding.

[0014] The technical effects and advantages provided by this utility model in the above technical solution are as follows:

[0015] By rotating the internal threaded lifting sleeve with the external hexagonal sleeve, and adjusting the height of the internal threaded lifting sleeve by raising or lowering the external threaded support rod, the magnitude of the jacking force can be controlled. The jacking beam evenly transmits the jacking force to the crossbeam, and then through the crossbeam, the jacking force is transmitted to the longitudinal beam and the lower chord. The crossbeam is supported by the equidistantly distributed lifting sleeves, forming multi-point support, and the support strength at each point can be adjusted, so as to achieve precise compensation for the jacking force on the lower chord of the steel truss and avoid useless support jacking. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this utility model. For those skilled in the art, other drawings can be obtained based on these drawings.

[0017] Figure 1 This is a three-dimensional structural diagram of a steel truss lower chord jacking force reinforcement device according to the present invention;

[0018] Figure 2 This is a schematic diagram of the upper chord structure of a steel truss lower chord jacking force reinforcement device according to the present invention;

[0019] Figure 3 This is a schematic diagram of the ship plate structure of a steel truss lower chord jacking force reinforcement device according to the present invention;

[0020] Figure 4 This is a schematic diagram of the internal threaded lifting sleeve structure of the steel truss lower chord jacking force reinforcement device of this utility model;

[0021] Figure 5 This is a schematic diagram of the cross-sectional structure of the internal threaded lifting sleeve of the steel truss lower chord jacking force reinforcement device of this utility model.

[0022] Explanation of reference numerals in the attached figures:

[0023] 1. Upper chord, 2. Lower chord, 3. Horizontal beam, 4. Longitudinal beam, 5. Ship plate, 6. Push beam, 7. Positioning column, 8. External thread support rod, 9. Internal thread lifting sleeve, 10. External hexagonal sleeve, 11. Positioning ring, 12. Rubber pad, 13. Positioning plate, 14. Upper horizontal longitudinal bracing, 15. Lower horizontal longitudinal bracing, 16. Vertical rod, 17. Diagonal rod, 18. Bridge gantry. Detailed Implementation

[0024] The following drawings will disclose several embodiments of this utility model. For clarity, many physical details will be described in the following description. However, it should be understood that these physical details should not be used to limit this utility model. That is, in some embodiments of this utility model, these physical details are not essential. In addition, for the sake of simplicity, some conventional structures and components will be shown in the drawings in a simple schematic manner.

[0025] Furthermore, in this utility model, the use of terms such as "first" and "second" is for descriptive purposes only and does not specifically refer to any order or sequence, nor is it intended to limit the utility model. They are merely used to distinguish components or operations described with the same technical terms and should not be construed as indicating or implying their relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the technical solutions of various embodiments can be combined with each other, but only if they are feasible for those skilled in the art. If a combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0026] Example 1

[0027] Refer to the instruction manual appendix Figures 1-5 A steel truss girder lower chord push-resistance reinforcement device includes a steel truss girder and a reinforcement device. The steel truss girder includes two upper chords 1 and two lower chords 2. The outer walls of the corresponding sides of the top of the two upper chords 1 are welded together to form an upper horizontal longitudinal bracing 14. Then, vertically downwardly distributed vertical bars 16 are welded between the two upper chords 1. An inclined diagonal bar 17 is welded to the bottom outer wall of the upper chord 1. The bottom one end of the diagonal bar 17 is welded to the top outer wall of the lower chord 2. Inclined bridge gantry 18s are welded to the outer walls of both ends of the upper chord 1. The other end of the bridge gantry 18 is welded to the top one end of the lower chord 2. The lower horizontal longitudinal bracing 15 is welded to the corresponding sides of the bottom of the two lower chords 2.

[0028] Example 2

[0029] Based on Embodiment 1, crossbeams 3, which are evenly distributed, are welded to the outer wall of the corresponding side between the two lower chords 2. Two longitudinal beams 4 are then attached to the top outer wall of the crossbeams 3, and the crossbeams 3 and longitudinal beams 4 are welded to each other.

[0030] Example 3

[0031] Based on Embodiment 1, a reinforcing device is provided at the bottom of the rigid truss beam. A ship plate 5 is provided on the outer wall of the side where the two lower chords 2 are far apart from each other. A positioning plate 13 is fixed by welding on the outer wall of the corresponding side of the bottom of the two ship plates 5. Push beams 6 distributed at equal intervals are fixed by welding on the outer wall of the corresponding side of the bottom of the ship plates 5. The push beams 6 are located directly below the crossbeam 3.

[0032] Example 4

[0033] Based on Embodiment 1, the top outer wall of the jacking beam 6 is fixed by welding equidistantly distributed positioning columns 7, and vertically upward external thread support rods 8 are welded to the top outer wall of the positioning columns 7. The internal thread lifting sleeve 9 is screwed to the top outer wall of the external thread support rods 8, and an external hexagonal sleeve 10 is welded to the bottom outer wall of the internal thread lifting sleeve 9. A positioning ring 11 is fixed to the top outer wall of the internal thread lifting sleeve 9, and a rubber pad 12 is fixed to the inner wall of the positioning ring 11.

[0034] Working principle of this utility model:

[0035] Refer to the instruction manual appendix Figures 1-5 This utility model consists of a steel truss main frame structure composed of two upper chords 1 and two lower chords 2. The upper horizontal longitudinal bracing 14 and the lower horizontal longitudinal bracing 15 enhance the lateral stability of the upper chords 1 and the lower chords 2 respectively. The vertical members 16, the diagonal members 17 and the bridge gantry 18 together form a stable truss system. The platform composed of the equally spaced horizontal beams 3 and the longitudinal beams 4 can be used to place equipment as a construction operation surface. The reinforcement device is mainly located on both sides of the bottom of the lower chord 2 through the ship plates 5. The positioning plate 13 plays a positioning and auxiliary support role for the ship plates 5, and places the lower chord 2 inside the two ship plates 5 and the two positioning plates 13.

[0036] When the truss system requires jacking force compensation, the internal threaded lifting sleeve 9 is rotated by the external hexagonal sleeve 10, causing it to rise or fall along the external threaded support rod 8. By adjusting the height of the internal threaded lifting sleeve 9, the magnitude of the jacking force is controlled. The jacking beam 6 evenly transmits the jacking force to the crossbeam 3, and then through the crossbeam 3, the jacking force is transmitted to the longitudinal beam 4 and the lower chord 2, thereby reinforcing the entire truss. The truss is supported by the equidistantly distributed lifting sleeves 9, forming multi-point support, and the support strength at each point can be adjusted, achieving precise compensation for the jacking force on the lower chord of the steel truss beam, and avoiding useless support jacking action.

[0037] 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 reinforcement device for the jacking force of the lower chord of a steel truss girder, comprising a reinforcement device, characterized in that: The reinforcing device includes a ship plate (5). The bottom of the ship plate (5) is fixed with equidistant push beams (6) by welding. The top outer wall of the push beams (6) is fixed with equidistant positioning columns (7) by welding. The bottom of the two ship plates (5) is fixed with positioning plates (13) by welding. The top outer wall of the positioning column (7) is fixed with a vertically upward external threaded support rod (8) by welding. The top outer wall of the external threaded support rod (8) is screwed with an internal threaded lifting sleeve (9). The bottom outer wall of the internal threaded lifting sleeve (9) is welded with an external hexagonal sleeve (10).

2. The steel truss lower chord jacking force reinforcement device according to claim 1, characterized in that: In use, the two ship plates (5) are respectively fixed to the steel truss beam by bolts.

3. The steel truss lower chord jacking force reinforcement device according to claim 2, characterized in that: The steel truss includes two upper chords (1) and two lower chords (2). The two lower chords (2) are respectively located at the bottom of the two upper chords (1). The characteristic is that: the outer wall of the corresponding side between the two lower chords (2) is provided with equally distributed crossbeams (3) by welding, the outer wall of the side away from each other of the two lower chords (2) is provided with a ship plate (5), and the push beam (6) is located directly below the crossbeam (3).

4. The steel truss lower chord jacking force reinforcement device according to claim 3, characterized in that: The top outer wall of the crossbeam (3) is fitted with two longitudinal beams (4), and the fitting parts of the crossbeam (3) and the longitudinal beams (4) are fixed by welding.

5. The steel truss lower chord jacking force reinforcement device according to claim 1, characterized in that: A positioning ring (11) is fixedly provided on the outer wall of one end of the internal thread lifting sleeve (9), and a rubber pad (12) is fixedly provided on the inner wall of the positioning ring (11).

6. The steel truss lower chord jacking force reinforcement device according to claim 3, characterized in that: The top of the two upper chords (1) is fixedly provided with an upper horizontal longitudinal joint (14) by welding on the corresponding side outer wall, and the bottom of the two lower chords (2) is fixedly provided with a lower horizontal longitudinal joint (15) by welding on the corresponding side outer wall.

7. The steel truss lower chord jacking force reinforcement device according to claim 3, characterized in that: The upper chord (1) and the lower chord (2) are connected by welding vertically downward rods (16) that are evenly distributed. The bottom outer wall of the upper chord (1) is also fixed by welding a downward inclined rod (17), and the bottom outer wall of the inclined rod (17) is fixed by welding to the top outer wall of the lower chord (2). The two outer walls of the upper chord (1) are fixed by welding a downward inclined bridge frame (18), and the other outer wall of the bridge frame (18) is fixed by welding to the top outer wall of the lower chord (2).

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