Steel box girder lifting structure and lifting method of large-span combined beam

Abstract

The invention discloses a large-span composite beam steel box girder lifting structure and method. The lifting structure comprises a portal lifting frame and a reinforced concrete box girder arranged on a bridge in the extending direction of the bridge. The portal lifting frame comprises a cross beam and two supporting columns. A lifting trolley is arranged on the cross beam. The upper ends of the two supporting columns are used for supporting the two ends of the cross beam. The lower end of each supporting column is provided with a moving trolley. The upper ends of the two supporting columns are flush. The lower ends of the two supporting columns have a height difference, and the higher supporting column and the lower supporting column are formed. The moving trolley at the lower end of the higher supporting column is arranged on the upper surface of the reinforced concrete box girder. The moving trolley at the lower end of the lower supporting column is arranged on the ground. The large-span composite beam steel box girder lifting structure is combined with the lifting method. The cast-in-situ reinforced concrete box girder serves as the track laying surface of the moving trolley of the higher supporting column of the portal lifting frame. The width of the occupied area of the portal lifting frame is reduced. The leveling cost of a roadbed during track laying is saved. The economic performance is good.

Description

technical field

[0001] The invention belongs to the technical field of building construction, and in particular relates to a steel box girder hoisting structure and a hoisting method of a large-span combined girder. Background technique

[0002] With the rapid and steady growth of the country's economic construction and the vigorous development of infrastructure construction, the number of long-span bridges has been continuously increased in recent years. At present, the combined beam composed of steel box girder and reinforced concrete box girder can obtain more superior structural mechanical properties and reasonable structural form. The tension area has good tensile strength and deformation capacity, but it is easy to yield in the compression area, and the reinforced concrete members are really good. On the contrary, the compressive strength is high, and the weight of pure steel members is lighter than that of pure reinforced concrete members, but the cost of reinforced c...

Examples

Embodiment Construction

[0028] The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0029] Such as figure 1 As shown, a steel box girder hoisting structure of a large-span combined beam in the present embodiment includes a gantry hoisting frame 1 and a reinforced concrete box girder 21, and the gantry hoisting frame 1 includes a crossbeam 13 and two supporting columns, and the two supporting The upper ends of the columns are flush and the lower ends have a height difference to form high support columns 11 and low support columns 12. The beams 13, high support columns 11 and low support columns 12 are all welded by square steel pipes and angle steels. The crossbeam 13 is provided with a lifting trolley 15, and the upper ends of the high support column 11 and the low support column 12 respectively support the two ends of the crossbeam 13 and the lower ends are provided with a walking trolley 14. The reinforced concrete box gi...

technical field

[0001] The invention belongs to the technical field of building construction, and in particular relates to a steel box girder hoisting structure and a hoisting method of a large-span combined girder. Background technique

[0002] With the rapid and steady growth of the country's economic construction and the vigorous development of infrastructure construction, the number of long-span bridges has been continuously increased in recent years. At present, the combined beam composed of steel box girder and reinforced concrete box girder can obtain more superior structural mechanical properties and reasonable structural form. The tension area has good tensile strength and deformation capacity, but it is easy to yield in the compression area, and the reinforced concrete members are really good. On the contrary, the compressive strength is high, and the weight of pure steel members is lighter than that of pure reinforced concrete members, but the cost of reinforced c...

Examples

Embodiment Construction

[0028] The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0029] Such as figure 1 As shown, a steel box girder hoisting structure of a large-span combined beam in the present embodiment includes a gantry hoisting frame 1 and a reinforced concrete box girder 21, and the gantry hoisting frame 1 includes a crossbeam 13 and two supporting columns, and the two supporting The upper ends of the columns are flush and the lower ends have a height difference to form high support columns 11 and low support columns 12. The beams 13, high support columns 11 and low support columns 12 are all welded by square steel pipes and angle steels. The crossbeam 13 is provided with a lifting trolley 15, and the upper ends of the high support column 11 and the low support column 12 respectively support the two ends of the crossbeam 13 and the lower ends are provided with a walking trolley 14. The reinforced concrete box gi...

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