Construction method of sand box combined all-sand base form for supporting the upper wall of the abutment of the 10,000-ton swivel arch bridge

Abstract

The invention relates to the technical field of bridge construction, particularly relates to a construction method of a complete sand bottom form of molding flasks combination for supporting the hanging side of a 10,000 tons turning arc bridge abutment. For one aspect the proper arrangement of ordinary flasks and steel ball flasks with the coordination of spherical hinge constitute a main load bearing system to support the hanging side loads. For another aspect the placement of a layer of mortar bed on compacted river sand, with the coordination of the flask top plates and the concrete in the spherical hinge area constitute the complete sand bottom form of molding flasks combination. The method applies the advantages of strong bearing capacity and minimum deformation of the river sand and mortar bed for the formation of the hanging side to guarantee the safety and precision at the hanging side bottom. At the same time the method also applies the flatness and rigidity merits of the mortar bed to provide a flat working surface for the construction work on the hanging side. The method can make the hanging side grouting construction completely safe and reliable. The method has the advantages of simple process, simple erection and dismantling, low fabrication costs, negligible waste of resources, all of which are beneficial for saving both the work schedule and funds. The method implies huge economical benefits, social benefits and environmental benefits.

Description

technical field [0001] The invention relates to the technical field of bridge construction, in particular to a construction method for a sandbox-combined full-sand bottom form for supporting the upper plate of an abutment of a 10,000-ton swivel arch bridge. Background technique [0002] The steps of the construction method of the planar swivel arch bridge are generally as follows: divide the arch ring into two half-spans, use the terrain on both sides to construct the upper and lower walls respectively, set up simple supports and assemble the arch ribs, set the buckle cables and back cables, and tension the buckle cables to make them The arch rib is detached from the support, and the arch rib is rotated through the slow rotation of the upper plate, and the buckle cable is stretched to adjust the arch axis and the elevation of the vault to meet the requirements and then close up. [0003] The upper and lower plates of the abutment of the swivel arch bridge and the central rot...

AI Technical Summary

Problems solved by technology

[0003] The upper and lower plates of the abutment of the swivel arch bridge and the central rotating hinge form a rotating system. After the construction is completed, the rotation is realized by the rotation of the upper plate relative to the lower plate. The swivel arch bridge needs to build the upper and lower plates separately. Finally, the steel structure support and steel formwork are used as the supporting bottom formwork, and then the upper wall and other superstructures are built. The weight of the upper wall and the upper junction piers and other auxiliary structures is huge, and the use of conventional formwork as the upper wall bottom form often has a large Hidden dangers, if slurry leakage and mold expansion occur in the upper plate bottom mold during the upper plate pouring process, it will affect the swivel construction operation and cause huge economic losses

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