Prefabricated box beam steel bar framework bundling hydraulic formwork and construction method

Abstract

The invention discloses a prefabricated box beam steel bar framework bundling hydraulic formwork and a construction method, and belongs to the field of bridge construction. The prefabricated box beamsteel bar framework bundling hydraulic formwork structurally comprises tracks, moving frames, a steel bar framework and the like. Mainly, combined design is adopted in the two moving frames and a fixing base. A plurality of hydraulic systems are used for synchronously driving the two moving frames to oppositely move and be gathered so that the steel bar framework can be positioned for bundling forming, or to move, separate from each other and disengage from the steel bar framework, and hoisting-out is convenient. The structure has the advantages that firstly, the structure is simple, usage isconvenient, and the labor intensity of operation personnel is relieved; secondly, the steel bar framework manufacturing precision is high, errors are few, the thickness of a box beam concrete protection layer is better guaranteed, and durability is improved; and thirdly, through the hydraulic systems, the mechanical degree of the formwork is improved, construction is rapid, and the production efficiency is high. Thus, the prefabricated box beam steel bar framework bundling hydraulic formwork is designed, the corresponding construction method is combined, so that the advantages that the integral construction quality is improved, the durability of the engineering structure is enhanced, and energy saving and emission reducing are achieved are achieved, and economic benefits and social benefits are obvious.

Description

Technical field [0001] The invention relates to the field of bridge construction, in particular to a hydraulic formwork for binding a prefabricated box girder steel bar skeleton and a construction method. Background technique [0002] The prefabricated box girder usually separates the U-shaped steel framework and the roof steel framework below the top slab and binds them to form, and then hoists the U-shaped steel framework into the prefabricated outer formwork as a whole, then places the inner mold, installs the roof steel framework, and pours the concrete. Among these processes, tying the U-shaped steel bar framework requires high precision, strong technicality, and is also the most complicated and labor-intensive process. Currently, a fixed steel bottom mold is generally installed at the bottom of the U-shaped reinforcing steel frame to locate the bottom longitudinal steel bars and bottom plate stirrups. There are three methods for installing web-shaped steel positioning molds...

AI Technical Summary

Problems solved by technology

Among these processes, binding the U-shaped steel skeleton requires high precision and strong technical skills, and it is also the most complicated and labor-intensive process.

At present, a fixed steel bottom mold is generally installed at the bottom of the U-shaped steel frame to locate the bottom longitudinal steel bars and floor stirrups. There are three methods for setting the web-shaped steel positioning formwork on both sides of the U-shaped steel frame to locate the web longitudinal steel bars and web stirrups: One is the fixed formwork on both sides, that is, the formwork is set on both sides of the U-shaped steel skeleton. This method has a simple structure, but because the fixed formwork on both sides of the U-shaped steel Due to the existence of frictional resistance, it is difficult to lift out the U-shaped steel frame as a whole, so a certain gap must be left between the fixed formwork on both sides and the longitudinal steel bars and web steel bars, which affects the accuracy of the U-shaped steel frame; The second is the movable formwork on both sides, that is, the movable formwork is set on both sides of the U-shaped steel skeleton. The longitudinal reinforcement of the web and the web stirrup are fixed and bound and then removed from the formwork on both sides. Manual movement is time-consuming and laborious. The labor intensity is high; the third is the fixed and movable formwork on both sides, the published utility model patent CN201420061840.4 "a prefabricated small box girder steel skeleton tire formwork for expressways", that is, a support with a large number of rotating side belly reinforcements The rod separates the positioning chuck from the steel frame, and separates the steel frame as a whole from the formwork on both sides. This method also has the disadvantage of time-consuming and laborious

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