Integral lifting and installation construction method for prefabricated temporary steel pipe brackets

Abstract

The invention provides an integral lifting and installation construction method for prefabricated temporary steel pipe brackets. The integral lifting and installation construction method comprises the steps that a bracket prefabricated jig frame is erected according to the requirements of the installation structure and integral lifting, a semi-finished product structure detail drawing is drawn according to a design drawing, and blanking is prepared at the same time; horizontal bracings and cross bridgings are integrally welded and connected, and steel pipe vertical column positioning and welding start to be conducted on the steel pipe bracket prefabricated jig frame at the same time; the horizontal bracing cross bridging welded pieces are welded to steel pipe vertical columns, and steel pipe bracket assembling construction is started; the super-long steel pipe brackets are processed by adopting a matching method, so that the site bracket installation precision requirement is met; the prefabricated steel pipe brackets are transported to the installation site through transportation equipment and are lifted to be in place at a time through lifting equipment; and steel pipes are adjusted according to the elevations of target structure bottom plates, so that structure pre-arches and cross slopes meet the installation requirements. According to the integral lifting and installation construction method for the prefabricated temporary steel pipe brackets, the construction progress is speeded up; the high-altitude operation risk is reduced; the assembling difficulty of the assemblies is lowered; the installation precision is improved; and the influence of high-altitude factors on the welding quality is overcome.

Description

technical field [0001] The invention relates to a prefabricated temporary steel pipe support in the back field and a temporary support installation method for overall hoisting in place on site, and belongs to the technical field of steel pipe support prefabrication. Background technique [0002] With the rapid development of the domestic economy, the pace of construction of domestic expressways and urban road networks has increased year by year, and the scale of bridge construction has reached the international leading level in the world. There are many types of temporary supports used in bridge construction, such as bowl buckle supports, pan buckle supports, portal supports and steel pipe supports. In the construction of traffic facilities in mountainous areas with narrow space, large terrain fluctuations, and inconvenient transportation, steel pipe-shaped steel brackets are used for temporary piers relatively frequently. At present, domestic temporary steel pipe brackets a...

AI Technical Summary

Problems solved by technology

[0003] When the on-site assembly method is used for construction, it conflicts with the construction of the bridge cap and pier body structure. It is necessary to complete the main construction tasks of the substructure before the bracket assembly operation, which is a flow operation; at the same time, the height of the general bracket erection is more than 10m. For high-altitude operations, the amount of welding work for on-site assembly is relatively large. When welding, the welding process is mostly vertical welds. Compared with horizontal welding, the welding progress is slow, the quality is poor, more resources and facilities are invested, and the construction cost is higher. , and there are many safety hazards in high-altitude operations, and management is difficult

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