Large-span large-section steel box girder construction system

Abstract

The utility model relates to a large-span large-section steel box girder construction system which comprises pier studs, existing piles, a No.0 steel box girder and an assembled steel box girder. The pier column and the existing pile are arranged on the two sides respectively, and the existing bridge plate is arranged on the existing pile. The lifting system comprises a lifting groove and a lifting piece, and the lifting piece slides in the lifting groove, is fixedly connected with the assembled steel box girder and is used for lifting the assembled steel box girder to the top faces of the first supporting beam and the second supporting beam. The temporary supporting structure has the advantages that the temporary piles are combined with the square columns to form an effective temporary supporting structure, the stability of the steel box girder in the construction process is guaranteed, and therefore potential safety hazards of construction are reduced; the existing bridge plate is adopted as a construction platform, and the temporary support and the fixed base are combined for installation, so that construction is convenient; by ensuring the reliable connection between the No.0 steel box girder and the assembled steel box girder, the stability and the bearing capacity of the whole structure are optimized, so that the engineering quality of the whole bridge is improved, and the service life of the whole bridge is prolonged.

Description

Technical Field

[0001] This utility model relates to the field of bridge engineering and its construction technology, and in particular to a construction system for large-span, large-section steel box girders. Background Technology

[0002] With the increasing demand for transportation, long-span bridges are playing an increasingly important role in modern infrastructure construction. These bridges have advantages such as high load-bearing capacity, large span, and long service life, which can effectively improve traffic flow and boost regional economic development. However, traditional bridge construction methods often face problems such as high construction difficulty, long construction period, and safety hazards when dealing with long-span, high-section steel box girders.

[0003] In the construction of long-span bridges, the use of steel box girder structures has become a mainstream trend. Steel box girders not only possess excellent bending and torsional resistance but also effectively reduce their self-weight, lowering the load on the substructure. Furthermore, the manufacture and transportation of steel box girders are more convenient, making them suitable for large-scale bridge projects. However, the installation of steel box girders often requires complex temporary support systems to ensure their stability and safety during construction.

[0004] Currently, many construction schemes employ auxiliary structures such as temporary piles and support beams. However, in practice, a series of problems still arise, including the design, construction, and subsequent dismantling of the support system. These problems not only affect construction efficiency but may also lead to potential quality and safety hazards in the project. Utility Model Content

[0005] The purpose of this invention is to overcome the shortcomings of the existing technology and provide a construction system for large-span, large-section steel box girders.

[0006] This large-span, large-section steel box girder construction system includes piers, existing piles, No. 0 steel box girder, and assembled steel box girder; the piers and existing piles are located on both sides, and the existing bridge deck is installed on the existing piles;

[0007] The construction of the temporary pier column involves two parallel first temporary piles, each with a first square column, a lifting system, and a first support beam. The construction of the temporary existing pile involves a second temporary pile, each with a second square column, which also has a lifting system. The existing bridge deck has a third temporary pile, each with a third square column, and the top of the third square column has a second support beam.

[0008] The lifting system includes a lifting channel and a lifting component. The lifting component slides within the lifting channel and is fixedly connected to the assembled steel box girder, and is used to lift the assembled steel box girder to the top surface of the first support beam and the second support beam.

[0009] As preferred, the temporary pier column has a connecting piece between the temporary pier column and the first temporary pile, the upper part of the first square column of the two first temporary piles is connected by the first support beam; the second temporary pile is connected with the existing bridge plate through the transverse connecting rod.

[0010] As preferred, the lifting system on the first square column comprises a first lifting rod, a first lifting piece and a first lifting slot; the first lifting slot is arranged along the height direction of the first square column, the first lifting piece is embeddedly installed in the first lifting slot, the first lifting piece is connected with the first lifting rod, the first lifting piece can drive the first lifting rod to slide up and down in the first lifting slot, and the first lifting rod is fixed with the assembled steel box girder.

[0011] As preferred, the lifting system on the second square column comprises a second lifting rod, a second lifting piece and a second lifting slot; the second lifting slot is arranged on the second square column, the second lifting piece is embeddedly installed in the second lifting slot, the second lifting piece is fixed with the second lifting rod, and the second lifting rod is fixed with the assembled steel box girder.

[0012] As preferred, two fixed bases are arranged on the existing bridge plate, the third temporary pile is installed on the fixed base through the fixed bolt, the third temporary pile has a third square column, the top of the third square column has a second support beam; the middle parts of the two third square columns are connected by the horizontal beam, and the third square column is connected with the adjacent second square column by the side horizontal beam.

[0013] As preferred, the cap beam is arranged on the pier column, the No. 0 steel box girder is arranged on the cap beam, and the assembled steel box girder is connected with the No. 0 steel box girder to form the in-place steel box girder.

[0014] The utility model discloses the beneficial effects are:

[0015] 1) the utility model discloses temporary pile combines square column, forms effective temporary support structure, ensures the stability of steel box girder in the construction process, thereby reduces the construction safety hidden danger.

[0016] 2) the utility model discloses lifting system is equipped with the lifting rod, can realize efficient steel box girder hoisting and positioning, and this design makes assembled steel box girder also can smoothly lift under the condition of large span, guarantees the smooth progress of construction.

[0017] 3) the utility model discloses existing bridge plate as construction platform, combines the installation of temporary support and fixed base, and is convenient for construction.

[0018] 4) the utility model discloses reliable connection of No. 0 steel box girder and assembled steel box girder, optimizes the stability and carrying capacity of overall structure, thereby improves the engineering quality and service life of whole bridge.

[0019] 5)The utility model discloses a combination of assembling platform and hoisting lifting platform, which is suitable for the construction of large-span steel box girder and can be flexibly applied to other bridge types, has good adaptability and popularization, and meets the needs of different projects. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 It is large-span large-section steel box girder construction system schematic diagram of the application;

[0021] Figure 2 It is large-span large-section steel box girder construction system left view;

[0022] Figure 3 It is large-span large-section steel box girder construction system front view;

[0023] Figure 4 It is large-span large-section steel box girder installation after schematic diagram;

[0024] Figure 5 It is large-span large-section steel box girder installation after plan view.

[0025] The drawing mark explanation: 1, pier column;2, bent cap;3, 0 steel box girder;4, assembled steel box girder;5, existing pile;6, existing bridge plate;7, first temporary pile;8, first square column;9, first support beam;10, connecting piece;11, first pulling groove;12, first lifting piece;13, first pulling rod;14, second temporary pile;15, second square column;16, second pulling groove;17, fixed base;18, fixed bolt;19, third temporary pile;20, third square column;21, transverse connecting rod;22, flat cross beam;23, second support beam;24, side cross beam;25, in-place steel box girder;26, second pulling rod;27, second lifting piece. DETAILED DESCRIPTION

[0026] The utility model will be further described in connection with the embodiment. The following embodiment is only used for helping understanding the utility model. It should be pointed out that for ordinary person in this technical field, on the premise of not departing from the principle of the utility model, still can carry out a number of modification to the utility model, and these improvements and modification also fall within the protection scope of the utility model claims.

[0027] As an embodiment, as shown in the figure, this large-span large-section steel box girder construction system includes pier column 1, bent cap 2, existing pile 5, existing bridge plate 6, 0 steel box girder 3 and assembled steel box girder 4. Pier column 1 and existing pile 5 are respectively arranged on both sides, and existing bridge plate 6 is arranged on existing pile 5. Figures 1 to 5

[0028] As shown in the figure, this large-span large-section steel box girder construction system includes pier column 1, bent cap 2, existing pile 5, existing bridge plate 6, 0 steel box girder 3 and assembled steel box girder 4. Pier column 1 and existing pile 5 are respectively arranged on both sides, and existing bridge plate 6 is arranged on existing pile 5. Figures 1 to 3 ​As shown, the temporary pier column 1 is constructed with two first temporary piles 7 arranged in parallel, the temporary pier column 1 and the first temporary piles 7 have a connecting piece 10 therebetween, the first temporary piles 7 have first square columns 8 thereon, the upper portions of the two first temporary piles 7 are connected by a first support beam 9, the first square columns 8 have a lifting system thereon, the lifting system comprises a first pulling rod 13, a first lifting piece 12 and a first pulling slot 11; the first lifting piece 12 is embeddedly installed in the first pulling slot 11, the first lifting piece 12 is connected with the first pulling rod 13, and the first lifting piece 12 can drive the first pulling rod 13 to slide up and down in the first pulling slot 11.

[0029] On the other side, the existing pile 5 is constructed with a second temporary pile 14, the second temporary pile 14 and the existing bridge plate 6 are connected by a transverse connecting rod 21, the second temporary pile 14 has a second square column 15 thereon, and the second square column 15 also has a lifting system thereon, the lifting system comprises a second pulling rod 26, a second lifting piece 27 and a second pulling slot 16.

[0030] The existing bridge plate 6 is installed with two fixed bases 17 arranged in parallel, a third temporary pile 19 is installed on the fixed base 17 by a fixed bolt 18, the third temporary pile 19 has a third square column 20 thereon, and the third square column 20 has a second support beam 23 at the top portion thereof; meanwhile, the middle portions of the two third square columns 20 are connected by a horizontal beam 22, the third square column 20 and the adjacent second square column 15 are connected by a side horizontal beam 24; the second square column 15 has a lifting system thereon, the lifting system comprises a second pulling rod 26, a second lifting piece 27 and a second pulling slot 16.

[0031] As shown in Figure 4 and Figure 5 In actual operation, the No. 0 steel box girder 3 is hoisted and positioned by using the existing bridge plate 6 as a construction platform, since the assembled steel box girder 4 has a large span and cannot be hoisted and positioned at one time, the existing pile 5, the existing bridge plate 6 and the above-mentioned newly-built temporary support are used as a temporary construction system, the assembled steel box girder 4 is connected by using the existing bridge plate 6, then the first pulling rod 13 and the second pulling rod 26 are used to connect the assembled steel box girder 4, and a winch is used as power to lift the assembled steel box girder 4 to the top surfaces of the first support beam 9 and the second support beam 23, the assembled steel box girder 4 is connected with the No. 0 steel box girder 3 to form a positioned steel box girder 25, so as to realize the fabrication and installation of the large-span steel box girder.

Claims

1. A long-span large-section steel box girder construction system, characterized in that, The pier column, the existing pile, the No. 0 steel box girder and the assembled steel box girder; the pier column and the existing pile are respectively arranged on two sides, and the existing bridge plate is arranged on the existing pile; The first temporary pile is arranged on the pier column, and the first temporary pile is provided with the first square column, and the first square column is provided with the lifting system and the first support beam; the second temporary pile is arranged on the existing pile, and the second temporary pile is provided with the second square column, and the second square column is also provided with the lifting system; the third temporary pile is arranged on the existing bridge plate, and the third temporary pile is provided with the third square column, and the third square column is provided with the second support beam on the top; The lifting system comprises a lifting groove and a lifting piece, the lifting piece slides in the lifting groove and is fixedly connected with the assembled steel box girder, and is used for lifting the assembled steel box girder to the top surface of the first support beam and the second support beam.

2. The long-span large-section steel box girder construction system according to claim 1, characterized in that, The connecting piece is arranged between the pier column and the first temporary pile, and the first square columns of the upper portions of the two first temporary piles are connected by the first support beam; the second temporary pile is connected with the existing bridge plate through the transverse connecting rod.

3. The long-span large-section steel box girder construction system according to claim 1, characterized in that, The lifting system on the first square column comprises a first lifting rod, a first lifting piece and a first lifting groove; the first lifting groove is arranged along the height direction of the first square column, the first lifting piece is embeddedly installed in the first lifting groove, the first lifting piece is connected with the first lifting rod, the first lifting piece can drive the first lifting rod to slide up and down in the first lifting groove, and the first lifting rod is fixed with the assembled steel box girder.

4. The long-span large-section steel box girder construction system according to claim 1, characterized in that, The lifting system on the second square column comprises a second lifting rod, a second lifting piece and a second lifting groove; the second lifting groove is arranged on the second square column, the second lifting piece is embeddedly installed in the second lifting groove, the second lifting piece is fixed with the second lifting rod, and the second lifting rod is fixed with the assembled steel box girder.

5. The long-span large-section steel box girder construction system according to claim 1, characterized in that, The two fixing bases are arranged on the existing bridge plate, the third temporary pile is installed on the fixing base through the fixing bolt, the third temporary pile is provided with the third square column, and the third square column is provided with the second support beam on the top; the middle portions of the two third square columns are connected by the horizontal beam, and the third square column is connected with the adjacent second square column by the side horizontal beam.

6. The long-span large-section steel box girder construction system according to claim 1, characterized in that, The cap beam is arranged on the pier column, the No. 0 steel box girder is arranged on the cap beam, and the assembled steel box girder is connected with the No. 0 steel box girder to form the in-place steel box girder.

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