Temporary support for bridge girder erection machine to erect large-span steel box girder

Abstract

A temporary support for a bridge girder erection machine to erect a large-span steel box girder comprises a temporary support foundation, a plurality of stand column structures are arranged in the temporary support foundation, column top components are arranged at the tops of the stand column structures, and bridge girder erection machine front auxiliary supporting leg supporting structures are arranged at the front ends of the column top components. The construction time of the temporary support is shortened, economic losses caused by the fact that a large amount of steel is used are avoided, and the construction cost is greatly reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of installing steel box girders of expressways, and particularly relates to a temporary bracket used for a bridge erecting machine to erect a large-span steel box girder. Background Art

[0002] The installation and construction of steel box girders with large spans and large clearance heights over the expressway are erected by bridge erection machines. Due to its large span and heavy deadweight, general bridge erection machines cannot meet its use requirements, and large bridge erection machines that meet the conditions need to be customized by the manufacturer, which is time-consuming and costly. Therefore, a compromise method is chosen, and a bridge erection machine with a smaller model is selected, which can be directly put into construction without customization. The rated span and rated installation weight of the smaller bridge erection machine cannot meet the hoisting of the entire span of the steel box girder, so the steel box girder needs to be installed in sections, and the steel box girder is divided into sections, and temporary brackets are set at the section positions. However, the use of general double-row temporary brackets cannot meet the requirements of the front auxiliary legs and front legs being in place when the bridge erection machine passes through the hole, resulting in the inability to install the steel box girder. However, when three rows of temporary brackets are used, the consumables are large and the construction period is long. Summary of the invention

[0003] The technical problem to be solved by the utility model is to provide a temporary support for erecting a large-span steel box girder by a bridge erecting machine. The utility model shortens the construction time of the temporary support, avoids the use of a large amount of steel materials and causes economic losses, and greatly reduces the construction cost.

[0004] In order to solve the above technical problems, the technical solution adopted by the utility model is:

[0005] A temporary support for erecting a large-span steel box girder by a bridge erecting machine comprises a temporary support foundation, wherein a plurality of column structures are arranged in the temporary support foundation, a column top component is arranged on the top of the column structure, and a front auxiliary leg support structure of the bridge erecting machine is arranged at the front end of the column top component.

[0006] Preferably, the plurality of column structures are arranged in a matrix.

[0007] Preferably, a plurality of column structures are connected by cross beams to form a grid-shaped structure.

[0008] Preferably, the column top member and the column structure are reinforced by a stiffening plate.

[0009] Preferably, two adjacent column structures are supported by supporting members.

[0010] Preferably, the column structure is fixed to the column top member by welding.

[0011] Preferably, the front auxiliary outrigger support structure of the bridge erecting machine is installed at the end of the crossbeam and connected to the column structure through an oblique support.

[0012] The utility model can achieve the following beneficial effects:

[0013] The utility model shortens the construction time of the temporary support, avoids the use of a large amount of steel materials to cause economic losses, and greatly reduces the construction cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The utility model is further described below in conjunction with the accompanying drawings and embodiments:

[0015] Figure 1 This is a top view of the temporary support of the utility model;

[0016] Figure 2 This is a schematic diagram of the temporary support elevation of the utility model Figure 1 ;

[0017] Figure 3 This is a schematic diagram of the temporary support elevation of the utility model Figure 2 .

[0018] In the figure: temporary support foundation 1, column structure 2, column top member 3, bridge erection machine front auxiliary leg support structure 4, stiffening plate 5, cross beam 6. DETAILED DESCRIPTION

[0019] The preferred solution is Figures 1 to 3 As shown, a temporary support for a bridge erection machine to erect a large-span steel box girder includes a temporary support foundation 1, wherein a plurality of column structures 2 are arranged in the temporary support foundation 1, a column top member 3 is arranged on the top of the column structure 2, and a front auxiliary leg support structure (4) of the bridge erection machine is arranged at the front end of the column top member 3. The plurality of column structures 2 are arranged in a matrix. The plurality of column structures 2 are connected by a cross beam to form a grid structure. The column top member 3 and the column structure 2 are reinforced by a stiffening plate 5. Two adjacent column structures 2 are supported by a support member. The column structure 2 is welded and fixed to the column top member 3. The front auxiliary leg support structure 4 of the bridge erection machine is installed at the end of the cross beam and is connected to the column structure 2 by an oblique support.

[0020] On the basis of the general temporary support structure, a front auxiliary leg support structure 4 of the bridge erection machine is added. When the bridge erection machine is used to erect a large-span steel box girder, the temporary support needs to meet the requirements of the bridge erection machine passing through the hole, the front leg moving forward and the steel box girder falling. The utility model shortens the construction time of the temporary support, avoids the use of a large amount of steel materials, causes economic losses, and greatly reduces the construction cost.

[0021] The installation process of this temporary support is as follows:

[0022] 1. The temporary support foundation 1 is cast using C35 steel bar (Φ12) concrete with 24×800×800mm steel plate embedded and Φ12 steel bar;

[0023] 2. Production of column structure 2: Column structure 2 uses 4 Φ630*8 spiral pipes of the same length and I25a I-beams (horizontal connection, diagonal brace) to assemble and weld into a standard column structure. A 24×800×800mm column top steel plate is set on the top of column structure 2 to facilitate subsequent assembly and welding with column top component 3;

[0024] 3. Fabrication of column top component 3: Column top component 3 is composed of two layers of I40a I-beams and Ø299*8 adjustment tubes. The lower layer of the two layers of I40a I-beams is a four-piece distribution beam, and the upper layer is a two-piece cross beam. The adjustment tube is fixed to the distribution beam or cross beam by welding, and the top surface elevation is verified and determined with the design elevation of the steel box beam;

[0025] 4. Fabrication of the front auxiliary outrigger support structure 4 of the bridge erector: The front auxiliary outrigger support structure 4 of the bridge erector is assembled and welded using I40a I-beams. It includes diagonal braces, cantilever beams and the front auxiliary outrigger support platform of the bridge erector;

[0026] 5. Temporary support construction: Install the manufactured column structure 2, column top component 3 and the front auxiliary leg support structure 4 of the bridge erection machine from bottom to top. At the same time, use the crossbeam reinforcement 5 to strengthen the connection strength between the column top components 3 and the column top component 3 and the column structure 2 to prevent the weld from tearing.

[0027] 6. Construction stage of installing steel box girder by bridge erection machine: After the construction of temporary support is completed, the bridge erection machine is ready to pass through the hole, the front auxiliary outrigger moves forward, and lands on the support structure 4 of the front auxiliary outrigger of the bridge erection machine, and the temporary support begins to bear force. The front outrigger of the bridge erection machine moves forward and lands on the I40a four-piece I-beam distribution beam that is closer to the front auxiliary outrigger support structure 4. The front outrigger of the bridge erection machine is adjusted in position, and the subsequent steel box girder is installed.

[0028] The above embodiments are only preferred technical solutions of the present invention and should not be regarded as limitations of the present invention. The protection scope of the present invention shall be the technical solutions recorded in the claims, including equivalent replacement solutions of the technical features in the technical solutions recorded in the claims. That is, equivalent replacement improvements within this scope are also within the protection scope of the present invention.

Claims

1. A temporary support for erecting a long-span steel box girder by a bridge erection machine, comprising a temporary support foundation (1), characterized in that: A plurality of column structures (2) are arranged in the temporary support foundation (1), a column top component (3) is arranged on the top of the column structure (2), and a front auxiliary leg support structure (4) of the bridge erecting machine is arranged at the front end of the column top component (3).

2. A temporary support for erecting a large-span steel box girder by a bridge erecting machine according to claim 1, characterized in that: The plurality of column structures (2) are arranged in a matrix.

3. The temporary support for erecting a large-span steel box girder by a bridge erecting machine according to claim 1, characterized in that: A plurality of column structures (2) are connected by cross beams to form a grid-shaped structure.

4. A temporary support for erecting a large-span steel box girder by a bridge erecting machine according to claim 3, characterized in that: The column top component (3) and the column structure (2) are reinforced by a stiffening plate (5).

5. The temporary support for erecting a large-span steel box girder by a bridge erecting machine according to claim 3, characterized in that: Two adjacent column structures (2) are supported by support members.

6. A temporary support for erecting a large-span steel box girder by a bridge erecting machine according to claim 3, characterized in that: The column structure (2) and the column top component (3) are fixed by welding.

7. The temporary support for erecting a large-span steel box girder by a bridge erecting machine according to claim 3, characterized in that: The front auxiliary outrigger support structure (4) of the bridge erecting machine is installed at the end of the crossbeam and is connected to the column structure (2) via an oblique support.

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