Integrated construction method of support of large cantilevered capping beam and vertical column

Abstract

The invention relates to the field of municipal engineering and aims to provide an integrated construction method of a support of a large cantilevered capping beam and a vertical column. The method sequentially includes a construction preparation stage, a first support set-up stage, a vertical column construction stage, a second support set-up stage, a capping beam construction stage and a support detachment stage. A support used in the vertical column construction stage and a support used in the capping beam construction stage are designed integrally, and steel pipe columns are supporting components for capping beam construction and also are scaffold components for vertical column construction, so that construction materials and labor forces can be effectively saved, and construction progress is accelerated. Further, the integrated construction method of the support of the large cantilevered capping beam and the vertical column can be extendedly applied to construction of concrete structures such as beam slabs with big cantilevers, long span and large size.

Description

technical field [0001] The invention relates to the field of bridge construction, in particular to an integrated construction method for the support of a large cantilever cover beam and a column in a municipal road. Background technique [0002] With the development of social economy, cars gradually enter the family, which makes the contradiction between the sharp increase in the number of social vehicles and the limited urban space become increasingly prominent. Traffic congestion has become the norm, and it is inevitable for urban traffic to develop high-altitude or underground. In the case of dense buildings around the road and it is difficult to widen the street, the use of viaducts can evacuate traffic density and improve transportation efficiency. At present, the construction of viaducts in large cities in China has formed a scale, but it is still difficult to meet the increasing traffic pressure. Viaducts have a tendency to develop in a multi-layered and higher direct...

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Problems solved by technology

At this time, if the construction of superhigh bridges is carried out in urban areas with relatively busy traffic, such as a certain elevated overpass that the inventor has encountered, the bridge deck has 32m from the highest point on the ground, and the column height is more than 15m. The platform foundation, the lower structure is a high column and cantilever cover beam, the upper part is a prefabricated box girder, and the bridge erecting machine is erected; at that time, the two ends of the cantilever of the cover beam were above the ramps on both sides, and the ground roads had to pass construction vehicles during construction, and the ramps on both sides The traffic cannot be interrupted, so the full hall support system commonly used in the original construction has become very inapplicable; and the scheme of installing embedded parts on the columns has hidden dangers of damage to the appearance of the columns and safety and reliability of welding

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