A walking method for the construction of the lower beam behind the hanging basket

Abstract

A walking method for rear lower cross beam construction of a hanging basket, wherein lifting point positions of the hanging basket formed by rear lower cross beams (5) and front lower cross beams (7) are shifted from front upper cross beams (2) to outer sliding beams (3) when walked. Lifting points of the rear lower cross beam (5) after the hanging basket is poured is hung on flanges of a box beam (14) on the same side by means of a rear lower cross beam hanger rod II (13). When the hanging basket is moved, the lifting points of the rear lower cross beams (5) are hung on the outer sliding beams (3) by means of walking hanger rods (15). Therefore, the distance between lifting points of the rear lower cross beams (5) becomes smaller when the hanging basket is walked, and shaking when a bottom mold and side molds are moved is reduced, thus improving safety. When walked, the positions of lifting points of the side molds and the bottom mold are unified, and the two will not impact each other, which makes the operation more stable.

Description

technical field [0001] The invention relates to the field of bridge construction, in particular to a walking method for construction of a lower crossbeam behind a hanging basket. Background technique [0002] The hanging basket is the main equipment in the bridge cantilever construction. According to the structural form, it can be divided into four types: truss type, cable-stayed type, steel type and mixed type. It has the characteristics of light weight, simple structure, solid and stable, easy to move forward and assemble and disassemble, strong reusability, small deformation after stress, etc., and there is sufficient space under the hanging basket, which can provide a large construction work surface, which is beneficial to Reinforcement formwork construction operations. [0003] In the traditional cantilever hanging basket structure, the lifting point of the rear lower beam is always outside the middle beam of the main truss on the bridge surface. Therefore, when the bo...

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Problems solved by technology

[0003] In the traditional cantilever hanging basket structure, the lifting point of the rear lower beam is always outside the middle beam of the main truss on the bridge surface. Therefore, when the bottom form and the side formwork are poured after a section is cast, due to the large distance between the two lifting points, the self-weight of the lower structure will The bending moment is large in the mid-span. In addition, due to the large spacing, the running is unstable. In order to solve the problem of large bending moment of the rear lower beam, the cross-sectional size of the rear lower beam is often required, which also increases the overall weight of the box girder cantilever hanging basket.

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