A combined support device for installation and precise adjustment of large-segment steel box beams

Abstract

The invention discloses a combined supporting device for installing and accurately adjusting a large-section steel box girder. The steel box girder consists of a steel box girder transverse diaphragm, a steel box girder longitudinal web, a steel box girder U-rib, a local reinforcement of the steel box girder and a steel box girder panel. The supporting pad beam is processed according to the longitudinal slope of the bridge. The three-way jack on the load-bearing beam lifts the supporting pad beam to adjust the position together with the adjustment cross beam. After the positioning is completed, the adjustment pad plate is filled between the supporting column and the supporting pad beam. After the steel box girder is adjusted and temporarily supported, the supporting column is welded to the top surface of the distribution beam to form a stable support. The device integrates the temporary supporting pad system and the adjustment system together to realize single-point adjustment and support. When the single-point support or adjustment load is too large during the installation of the large-section steel box girder, the steel beam transverse diaphragm and the longitudinal web are used to transmit force together to ensure that the steel box girder panel, the transverse diaphragm and the web have good force transmission during construction, so as to avoid large-area reinforcement and plate thickness adjustment inside the steel box girder.

Description

Technical Field

[0001] The invention relates to the field of steel structures, in particular to a combined supporting device for installing and accurately adjusting a large-segment steel box girder. Background Art

[0002] For the hoisting construction of large-section steel box girders, the arrangement of temporary supports and adjustment devices needs to be carefully considered. Large-section steel box girders are heavy and difficult to adjust, and high anti-overturning stability is required during adjustment and support. Due to the excessive force on a single point, temporary supports are generally arranged at the junction of the diaphragm and the longitudinal web of the steel box girder, and the area of ​​the connection line of each support should be maximized to ensure the overall stability of the steel beam during construction. The jack is arranged next to the temporary support and cannot be arranged at the junction of the diaphragm and the longitudinal web. Due to the insufficient rigidity of the diaphragm, it cannot meet the later adjustment construction of the steel box girder. Therefore, it is necessary to stiffen the jack at the corresponding diaphragm position so that the lifting force can be transmitted through the stiffening plate and the diaphragm together. However, this method is time-consuming and material-consuming, the stiffening structure is too complicated, the construction is difficult, the manpower and material resources required are too large, and the later processing is difficult, which reduces the construction efficiency. Due to the large load on the steel beam, the uneven force is more obvious, and the model, layout, and transportation of the jack are very high, which greatly increases the construction cost. Summary of the invention

[0003] The purpose of the present invention is to overcome the shortcomings of the prior art and provide a combined support device for installing and accurately adjusting a large-segment steel box girder. To achieve the above purpose, the present invention adopts the following technical solutions:

[0004] A combined support device for installing and accurately adjusting a large-segment steel box girder, characterized in that the steel box girder is composed of a steel box girder transverse diaphragm, a steel box girder longitudinal web, a steel box girder U-rib, a steel box girder local stiffener and a steel box girder panel; the support pad beam is processed according to the longitudinal slope of the bridge; the three-way jack on the load-bearing beam lifts the support pad beam and adjusts it together with the adjustment beam; after positioning is completed, the adjustment pad plate is filled between the support column and the support pad beam; after the steel box girder is adjusted and temporarily supported, the support column is welded to the top surface of the distribution beam to form a stable support.

[0005] Preferably, the steel box girder is an orthotropic plate steel box girder.

[0006] Preferably, during the processing and manufacturing of the steel box girder, local stiffening welding of the steel box girder is completed in advance.

[0007] Preferably, the support cushion beam and the adjustment beam are an integral whole, and the steel box beam is adjusted and temporarily supported in two directions through support columns and three-way jacks.

[0008] Preferably, the geometric dimensions and models of the supporting beams, adjusting beams, supporting columns, three-way jacks, and high-strength bolts are determined according to specific construction conditions and construction loads.

[0009] Preferably, the thickness of the positioning pad is between 1mm and 10mm. A large circular hole is opened at the designed position of the pad according to the model of the high-strength bolt. The diameter of the circular hole is specified in the steel structure design standard GB 50017. The flatness, edge blunting and grinding of the positioning pad should be checked according to the specification requirements.

[0010] Preferably, the screw rod of the high-strength bolt is a full-thread screw rod, and the screw rod length should be 2-4 cm longer than the expected length to ensure reliable installation of the nut.

[0011] Preferably, the cushion beam is cut and matched according to the designed longitudinal slope of the steel box beam to ensure that the cushion beam is in close contact with the steel box beam during the positioning and cushioning process.

[0012] Preferably, the three-way jack may be a standard mechanical equipment component or an on-site assembled equipment component.

[0013] Compared with the prior art, the present invention has the following advantages: a combined support device for installing and precisely adjusting large-section steel box girders, which integrates a temporary support system and a positioning system to achieve single-point positioning and support. When the single-point support or positioning load is too large during the installation of large-section steel box girders, the steel beam cross diaphragms and longitudinal webs are used to transmit force together, ensuring that the steel box girder panels, cross diaphragms and webs transmit force well during construction, avoiding large-area stiffening and plate thickness adjustment inside the steel box girder. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 The overall layout of the combined support device for installing and accurately adjusting the large-segment steel box girder of the present invention Figure 1 .

[0015] Figure 2 The overall layout of the combined support device for installing and accurately adjusting the large-segment steel box girder of the present invention Figure 2 .

[0016] Figure 3 This is the structural design drawing - front view of the combined support device for installing and accurately adjusting a large-segment steel box girder of the present invention.

[0017] Figure 4 This is the structural design diagram of the large-segment steel box girder installation and precise adjustment combined support device of the present invention - side view Figure 1 .

[0018] Figure 5 This is the structural design diagram of the combined support device for installing and accurately adjusting the large-segment steel box girder of the present invention - side view Figure 2 .

[0019] In the figure: 1. Steel box girder cross diaphragm, 2. Steel box girder U rib, 3. Local stiffening of steel box girder, 4. Steel box girder longitudinal web, 5. Adjustment cross beam, 6. Three-way jack, 7. Supporting pad beam, 8. Supporting column, 9. Rubber pad, 10. High-strength bolt, 11. Adjustment pad, 12. Distribution beam, 13. Load-bearing beam, 14. Steel box girder, 15. Steel box girder panel. DETAILED DESCRIPTION

[0020] The present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0021] like Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 As shown, a combined support device for installation and precise adjustment of a large-segment steel box girder comprises a steel box girder 14, wherein the steel box girder 14 comprises a steel box girder transverse diaphragm 1, a steel box girder longitudinal web 4, a steel box girder U-rib 2, a steel box girder local stiffener 3 and a steel box girder panel 15. The steel box girder 14 is supported by the combined support device, which comprises a rubber pad 9, a pad cushion beam 7, a pad column 8, an adjustment beam 5, an adjustment pad plate 11, a high-strength bolt 10 and a three-way jack 6, wherein the pad cushion beam 7 is processed according to the longitudinal slope of the bridge, a rubber pad 9 is placed on the pad cushion beam 7 to protect the outer surface of the steel box girder 14 from coating, and the rubber pad 9 and the pad cushion beam 7 can be used to The bonding measures increase the reliability. The supporting pad beam 7 is fully welded together with the adjusting cross beam 5. The supporting pad beam 7 is connected to the supporting column 8 by high-strength bolts 10. The high-strength bolts 10 are loosened when the steel box beam 14 is adjusted. The supporting pad beam 7 is lifted up by the three-way jack 6 arranged on the load-bearing beam 13 to adjust the position of the adjusting cross beam 5. After the positioning is completed, the supporting column 8 is moved, and the adjusting pad plate 11 is filled between the supporting column 8 and the supporting pad beam 7. The supporting column 8 and the supporting pad beam 7 are bolted together by high-strength bolts 10. After the adjustment and temporary support of the steel box beam 14 are completed, the supporting column 8 is welded to the top surface of the distribution beam 12 to form a stable supporting structure.

[0022] The steel box girder 14 is an orthotropic plate steel box girder.

[0023] During the manufacturing of the steel box girder 14, the local stiffening 3 of the steel box girder is welded in advance.

[0024] The support cushion beam 7 and the adjustment beam 5 are an integral whole, and the steel box beam 14 is adjusted and temporarily supported in two directions through the support cushion columns 8 and the three-way jack 6.

[0025] The geometrical dimensions and models of the support beam 7, the adjustment beam 5, the support column 8, the three-way jack 6 and the high-strength bolt 10 are determined according to the specific construction conditions and construction loads.

[0026] The thickness of the positioning pad 11 is between 1mm and 10mm. A large circular hole is opened at the designed position according to the model of the high-strength bolt 10. The diameter of the circular hole is specified in the steel structure design standard GB 50017. The flatness, edge blunting and grinding of the positioning pad 11 should be checked according to the specification requirements.

[0027] The screw rod of the high-strength bolt 10 is a full-thread screw rod, and the screw rod length should be 2-4 cm longer than the expected length to ensure reliable installation of the nut.

[0028] The support cushion beam 7 is cut and matched according to the designed longitudinal slope of the steel box beam 14 to ensure that the support cushion beam 7 is in close contact with the steel box beam 14 during the adjustment and support process.

[0029] The three-way jack 6 can be a standard mechanical equipment component or a field assembled equipment component.

[0030] Working principle of the invention: Beneficial effects of the invention:

[0031] (1) The device integrates the temporary support system and the adjustment system to achieve single-point adjustment and support. When the single-point support or adjustment load is too large during the installation of large-segment steel box girders, the steel beam diaphragms and longitudinal webs are used to transmit force together, ensuring that the steel box girder panels, diaphragms, and webs transmit force well during construction, and the plate units do not deform or even buckle excessively, avoiding large-area stiffening and plate thickness adjustment inside the steel box girder, saving construction time and material consumption;

[0032] (2) By combining two jacks to bear force synchronously, the demand for replacing large jacks with small ones is met, the investment in large jacks is reduced, the construction workers are more convenient to carry and transfer, the construction efficiency is improved, and good economic benefits are achieved. At the same time, the safety risks are reduced to a certain extent.

[0033] The above is a preferred embodiment of the present invention. For ordinary technicians in this field, according to the teachings of the present invention, without departing from the principles and spirit of the present invention, changes, modifications, substitutions and variations made to the implementation methods are still within the scope of protection of the present invention.

Claims

1. A combined support device for installation and precise adjustment of large-segment steel box girders, characterized in that: The invention comprises a steel box girder (14), wherein the steel box girder (14) is composed of a steel box girder transverse diaphragm (1), a steel box girder longitudinal web (4), a steel box girder U rib (2), a steel box girder local stiffener (3) and a steel box girder panel (15). The steel box girder (14) is supported by the above-mentioned combined support device, which comprises a rubber pad (9), a pad beam (7), a pad column (8), an adjustment beam (5), an adjustment pad plate (11), a high-strength bolt (10) and a three-way jack (6). The pad beam (7) is processed according to the longitudinal slope of the bridge, and a rubber pad (9) is placed on the pad beam (7) to protect the outer surface of the steel box girder (14) from coating. A bonding measure can be adopted between the rubber pad (9) and the pad beam (7) to increase reliability. The pad beam (7) and the adjustment beam (5) are connected together by full welding. The pad beam (7) and the pad column (8) are connected by high-strength bolts. (10) are connected together. When the steel box girder (14) is adjusted, the high-strength bolts (10) are loosened, and the support pad beam (7) is lifted by the three-way jack (6) arranged on the load-bearing beam (13) to adjust the position together with the adjustment crossbeam (5). After the positioning is completed, the support column (8) is moved, and the adjustment pad plate (11) is filled between the support column (8) and the support pad beam (7). The support column (8) and the support pad are connected by the high-strength bolts (10). The beams (7) are bolted together. After the steel box beam (14) is adjusted and temporarily supported, the support columns (8) are welded to the top surface of the distribution beam (12) to form a stable support structure. The steel box beam (14) is an orthogonal anisotropic plate steel box beam. The support cushion beam (7) and the adjustment beam (5) are a whole. In two directions, the steel box beam (14) is adjusted and temporarily supported by the support columns (8) and the three-way jack (6).

2. A combined support device for installation and precise adjustment of a large-segment steel box girder according to claim 1, characterized in that: During the processing and manufacturing of the steel box girder (14), the local reinforcement (3) of the steel box girder is welded and completed in advance.

3. A combined support device for installation and precise adjustment of a large-segment steel box girder according to claim 1, characterized in that: The geometrical dimensions and models of the support beam (7), the adjustment beam (5), the support column (8), the three-way jack (6), and the high-strength bolt (10) are determined according to the specific construction conditions and construction loads.

4. A combined support device for installation and precise adjustment of a large-segment steel box girder as claimed in claim 1, characterized in that: The thickness of the positioning pad (11) is between 1 mm and 10 mm. The pad is provided with a large circular hole at a designed position according to the model of the high-strength bolt (10). The diameter of the circular hole is as specified in the steel structure design standard GB 50017. The flatness, edge blunting and grinding of the positioning pad (11) shall comply with the requirements of the specification.

5. A combined support device for installation and precise adjustment of a large-segment steel box girder as claimed in claim 1, characterized in that: The high-strength bolt (10) has a full-thread screw rod, and the screw rod length should be 2-4 cm longer than the expected length to ensure that the nut can be installed reliably.

6. A combined support device for installation and precise adjustment of a large-segment steel box girder as claimed in claim 1, characterized in that: The supporting cushion beam (7) is cut to match the designed longitudinal slope of the steel box beam (14), ensuring that the supporting cushion beam (7) is in close contact with the steel box beam (14) during the positioning and supporting process.

7. A combined support device for installation and precise adjustment of a large-segment steel box girder as claimed in claim 1, characterized in that: The three-way jack (6) can be a standard mechanical equipment component or a field assembled equipment component.

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