A transverse limiting and rectifying device for steel box girder incremental launching construction

Abstract

The utility model provides a kind of for steel box girder incremental launching construction transverse limiting deviation rectification device, belong to steel box girder incremental launching construction field, it includes the support crossbeam (4) of transverse placement, the copy backing plate (3) for supporting steel box girder (2) is placed on support crossbeam (4), and transverse limiting deviation rectification mechanism (1) is symmetrically arranged in steel box girder two sides;The transverse limiting deviation rectification mechanism (1) includes base (101), limiting block (102), buffer plate (103), with the guide block (104) of groove, slider (105), slider positioning rod (106), inclined strut jack (107), hinged block (108), antiskid pushing plate (109), contact plate (110) and arc-shaped guide ball (111);The utility model's transverse limiting deviation rectification mechanism is reasonable in stress, simple structure, it is convenient to construct, can be accurate limit, correct transverse swing in steel box girder incremental launching construction, ensure that steel box girder moves along the direction that is determined, overall device is safe and reliable, loading and unloading convenient, applicability is wide, can effectively improve the security and precision of steel box girder incremental launching construction.

Description

Technical Field

[0001] This utility model relates to the field of bridge construction technology, specifically to a lateral limiting and correction device for the jacking construction of steel box girders. Background Technology

[0002] In modern bridge engineering, steel box girders have become the preferred structural form for long-span bridges due to their superior structural efficiency (high torsional stiffness, lightweight) and ease of construction. The incremental launching method involves assembling steel box girders segment by segment at abutments or piers and then using a hydraulic system to horizontally launch them to their designed positions. This method can efficiently cross existing transportation routes (such as highways, railways, and waterways) and minimize interference with ground activities. However, steel box girders are prone to lateral displacement ("tailing") during the launching process. The main reasons include: asymmetrical launching force: insufficient synchronization accuracy of multiple sets of jacks leads to force eccentricity; environmental disturbance: wind loads and temperature differences induce beam swaying; fluctuations in friction coefficient: contamination or wear on the slide surface causes sudden changes in friction force; and geometric nonlinearity: lateral displacement of curved sections of the beam due to centrifugal effect. If such deviations are not suppressed in time, they will lead to serious consequences: Structural safety risks: The deviation causes the center of gravity of the steel box girder to deviate from the temporary support point, which may trigger local buckling or overall overturning. Bridge quality defects: The cumulative deviation affects the smoothness of the alignment and the accuracy of closure, increasing the cost of later correction; Loss of construction efficiency: Traditional correction requires repeated work stoppages for measurement.

[0003] Current correction devices generally use a combination of "rigid limit plate + hydraulic jack", which has significant drawbacks: Coarse measurement: relying on manual measurement with a tape measure, the accuracy is difficult to control within ±10mm due to temperature differences and line-of-sight errors; Slow response: the time from offset detection to jack activation is too long, missing the optimal correction window; Weak anti-overturning: the single-point constraint of the limit plate cannot balance the correction reaction force, posing a risk of beam instability; Poor adaptability: the fixed structure is difficult to adapt to the geometric changes of curved beams or variable cross-section box girders.

[0004] Therefore, there is an urgent need to develop a correction device that integrates high-precision monitoring, dynamic locking protection, and geometric self-adaptation capabilities to overcome existing technical bottlenecks and ensure the safety, accuracy, and efficiency of steel box girder jacking construction. Utility Model Content

[0005] The purpose of this invention is to provide a lateral limiting and correction device for the jacking construction of steel box girders, so as to solve the above-mentioned shortcomings in the prior art.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] A lateral limiting and correction device for jacking construction of steel box girders, characterized in that it comprises: a horizontally placed support beam, a pad plate placed on the support beam for supporting the steel box girder, and lateral limiting and correction mechanisms symmetrically arranged on both sides of the steel box girder; the lateral limiting and correction mechanism includes a base, a limiting block, a buffer plate, a grooved guide block, a slider, a slider positioning rod, a diagonal brace jack, a hinge block, an anti-slip jacking plate, a contact plate, an arc-shaped guide ball, and a scale.

[0008] Furthermore, the base is fixed to the supporting beam, the grooved guide block is fixed above the center of the base, and the slider has a concave structure that can be embedded in the grooved guide block. The two sides of the concave structure form barbs that are embedded in the grooves on both sides of the grooved guide block, so that the slider can slide horizontally back and forth on the grooved guide block.

[0009] Furthermore, the slider positioning rod is a threaded steel rod with a knob at one end, located on the side of the slider, passing through the slider and inserted into the grooves on both sides of the guide block with grooves. The knob is used to control whether the threaded steel rod is inserted into the groove, thereby controlling whether the slider can slide.

[0010] Furthermore, the inclined jack is fixed directly above the slider and is hinged to the anti-slip jacking plate via a hinge block. The anti-slip jacking plate is connected to the contact plate by welding. Several arc-shaped guide balls are evenly spaced on the contact plate to buffer when it comes into contact with the side of the steel box girder.

[0011] Furthermore, the inclined brace jack can rotate the anti-slip jacking plate in the vertical direction via the hinge block, thereby adjusting the angle between the anti-slip jacking plate and the contact plate and the horizontal plane to adapt to steel box girders of different shapes.

[0012] Furthermore, the inclined jack slides horizontally through the slider, driving the anti-slip jacking plate and the contact plate to move relative to the steel box girder, and causing the arc-shaped guide ball on the contact plate to abut against the side of the steel box girder.

[0013] Furthermore, the base is engraved with scales. During use, the slider positioning rod can be loosened to allow the slider to move laterally with the steel box girder. The displacement value can be read through the scale. Then, the slider positioning rod is tightened to fix the slider. The diagonal brace jack is then activated to push the steel box girder and correct its lateral sway.

[0014] The beneficial effects of this utility model are:

[0015] In the above technical solution, the present invention provides a lateral limiting and correction device for the jacking construction of steel box girders. Through the scale on the base, the lateral displacement value generated by the steel box girder can be read in real time and accurately, improving the correction accuracy. The slider positioning rod, the limiting block and the buffer plate constitute multiple lateral protections, which greatly reduces the risk of lateral overturning of the steel box girder during the jacking process and improves the safety of construction. Furthermore, after tightening the slider positioning rod, the fixed slider provides a support platform for the diagonal bracing jack to laterally jack the steel box girder for correction. The operation is simple, the correction speed is fast, and the construction efficiency of steel box girder correction is improved. 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 schematic diagram of the overall structure of a lateral limiting and correction device for the jacking construction of steel box girders according to the present invention.

[0018] Figure 2 This is a three-dimensional schematic diagram of the lateral limiting and correction mechanism in this utility model.

[0019] Figure 3 This is a front view of the lateral limiting and correcting mechanism in this utility model.

[0020] Figure 4 This is a top view of the lateral limiting and correcting mechanism in this utility model.

[0021] Figure 5 This is a left view of the lateral limiting and correcting mechanism in this utility model.

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

[0023] 1. Lateral limiting and correction mechanism, 101. Base, 102. Limiting block, 103. Buffer plate, 104. Grooved guide block, 105. Slider, 106. Slider positioning rod, 107. Inclined brace jack, 108. Hinge block, 109. Anti-slip push plate, 110. Contact plate, 111. Arc-shaped guide ball, 112. Scale. Detailed Implementation

[0024] To enable those skilled in the art to better understand the technical solution of this utility model, the present utility model will be further described in detail below with reference to the accompanying drawings.

[0025] like Figure 1-5As shown, the lateral limiting and correction device for steel box girder jacking construction provided in this embodiment of the utility model includes: a horizontally placed support beam 4, a pad plate 3 placed on the support beam 4 for supporting the steel box girder 2, and lateral limiting and correction mechanisms 1 symmetrically arranged on both sides of the steel box girder; the lateral limiting and correction mechanism 1 includes a base 101, a limiting block 102, a buffer plate 103, a grooved guide block 104, a slider 105, a slider positioning rod 106, a diagonal bracing jack 107, a hinge block 108, an anti-slip jacking plate 109, a contact plate 110, an arc-shaped guide ball 111, and a scale 112.

[0026] In this specific embodiment, the base 101 is fixed to the supporting beam 4, the grooved guide block 104 is fixed above the center of the base 101, and the slider 105 has a concave structure that can be embedded into the grooved guide block 104. The two sides of the concave structure form barbs that are embedded in the grooves on both sides of the grooved guide block 104, so that the slider 105 can slide horizontally back and forth on the grooved guide block 104.

[0027] Furthermore, the slider positioning rod 106 is a threaded steel rod with a knob at one end, located on the side of the slider 105, passing through the slider 105 and inserted into the grooves on both sides of the guide block 104 with grooves. The knob is used to control whether the threaded steel rod is inserted into the groove, thereby controlling whether the slider 105 can slide.

[0028] Furthermore, the inclined jack 107 is fixed directly above the slider 105 and is hinged to the anti-slip jacking plate 109 through the hinge block 108. The anti-slip jacking plate 109 is connected to the contact plate 110 by welding. Several arc-shaped guide balls 111 are evenly spaced on the contact plate 110 for buffering when it comes into contact with the side of the steel box girder 2.

[0029] Furthermore, the inclined brace jack 107 can rotate the anti-slip jacking plate 109 in the vertical direction through the hinge block 108, thereby adjusting the angle between the anti-slip jacking plate 109 and the contact plate 110 and the horizontal plane to adapt to steel box beams 2 of different shapes.

[0030] Furthermore, the inclined jack 107 slides horizontally through the slider 105, driving the anti-slip jacking plate 109 and the contact plate 110 to move relative to the steel box girder 2, and causing the arc-shaped guide ball 111 on the contact plate 110 to abut against the side of the steel box girder 2.

[0031] Furthermore, the base 101 is engraved with a scale 112. During use, the slider positioning rod 106 can be loosened to allow the slider 105 to move laterally with the steel box girder 2. The displacement value can be read through the scale 112. Then, the slider positioning rod 106 is tightened to fix the slider 105. The diagonal brace jack 107 is then activated to push the steel box girder 2 and correct its lateral swing.

[0032] Example 1

[0033] This utility model provides a lateral limiting and correction device for the jacking construction of steel box girders. When the object is a straight steel box girder with a small lateral displacement, tightening the slider positioning rod 106 can fix the slider 105, limiting the lateral swing of the steel box girder 2 and making it conform to the design line. When the object is an arc-shaped steel box girder with a large lateral displacement, loosening the slider positioning rod 106 allows the slider 105 to move laterally with the steel box girder 2. The displacement value is then read through the scale 112, the slider positioning rod 106 is tightened to fix the slider 105, and the inclined brace jack 107 is activated to push the steel box girder 2 and correct its lateral swing.

[0034] The above description only illustrates certain exemplary embodiments of the present utility model. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present utility model. 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 utility model.

Claims

1. A lateral limiting and correction device for steel box girder jacking construction, characterized in that, include: A horizontally placed support beam (4), a pad plate (3) placed on the support beam (4) to support the steel box girder (2), and a lateral limiting and correction mechanism (1) symmetrically arranged on both sides of the steel box girder; the lateral limiting and correction mechanism (1) includes a base (101), a limiting block (102), a buffer plate (103), a grooved guide block (104), a slider (105), a slider positioning rod (106), a diagonal brace jack (107), a hinge block (108), an anti-slip jacking plate (109), a contact plate (110), an arc-shaped guide ball (111), and a scale (112).

2. The lateral limiting and correction device for steel box girder jacking construction according to claim 1, characterized in that, The base (101) is fixed on the supporting beam (4), and the grooved guide block (104) is fixed above the center of the base (101). The slider (105) has a concave structure and can be embedded in the grooved guide block (104). The two sides of the concave structure form barbs that are embedded in the grooves on both sides of the grooved guide block (104), so that the slider (105) can slide horizontally back and forth on the grooved guide block (104).

3. The lateral limiting and correction device for steel box girder jacking construction according to claim 1, characterized in that, The slider positioning rod (106) is a threaded steel rod with a knob at one end. It is located on the side of the slider (105), passes through the slider (105), and is inserted into the grooves on both sides of the guide block (104) with grooves. The knob is used to control whether the threaded steel rod is inserted into the groove, thereby controlling whether the slider (105) can slide.

4. The lateral limiting and correction device for steel box girder jacking construction according to claim 1, characterized in that, The inclined jack (107) is fixed directly above the slider (105) and is hinged to the anti-slip jacking plate (109) through the hinge block (108). The anti-slip jacking plate (109) is connected to the contact plate (110) by welding. Several arc-shaped guide balls (111) are evenly spaced on the contact plate (110) to buffer when it comes into contact with the side of the steel box girder (2).

5. A lateral limiting and correction device for steel box girder jacking construction according to claim 1, characterized in that, The inclined jack (107) can rotate the anti-slip jacking plate (109) in the vertical direction through the hinge block (108), thereby adjusting the angle between the anti-slip jacking plate (109) and the contact plate (110) and the horizontal plane, adapting to steel box girders (2) of different shapes.

6. A lateral limiting and correction device for steel box girder jacking construction according to claim 1, characterized in that, The inclined jack (107) slides horizontally through the slider (105), driving the anti-slip jacking plate (109) and the contact plate (110) to move relative to the steel box girder (2), and causing the arc-shaped guide ball (111) on the contact plate (110) to abut against the side of the steel box girder (2).

7. A lateral limiting and correction device for steel box girder jacking construction according to claim 1, characterized in that, The base (101) is engraved with a scale (112). When in use, the slider positioning rod (106) can be loosened to allow the slider (105) to move laterally with the steel box girder (2). The displacement value can be read through the scale (112). Then, the slider positioning rod (106) is tightened to fix the slider (105). The inclined brace jack (107) is started to push the steel box girder (2) to correct its lateral swing.

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