Combined construction method of cable-stayed bridge main beam and counterweight structure system of construction method

Abstract

The invention provides a combined construction method of a cable-stayed bridge main beam and a counterweight foundation structure system of the construction method. The construction method comprises the following steps: designing a scaffold foundation, designing an excavation slope and step height of a dam at an edge slope region, designing the counterweight structure system of an nth block to a (n+m)th block of a mid-span, excavating the dam, wholly pouring the scaffold foundation and a counterweight foundation, carrying out symmetrical construction on a side-span and the mid-span of a main beam block by block by adopting a construction method for pouring by adopting a symmetrical hanging basket cantilever at two sides, and constructing an nth block to a (n+m)th block of the side-span and the like. The counterweight system provided by the invention comprises the scaffold foundation and the counterweight structure system. A combined construction technology of a main beam front-support-point hanging basket cantilever pouring method and a bracket cast-in-place method is adopted and two technologies are combined together, so that a side-span main beam which cannot meet hanging basket cantilever pouring is constructed; meanwhile, a mid-span main beam and the side-span main beam are symmetrically constructed and a stress state of a cable-stayed bridge is wholly met; a working period is shortened and the construction cost is reduced.

Description

technical field

[0001] The invention relates to a construction method of a cable-stayed bridge, in particular to a combined construction method of hanging basket suspension construction and support cast-in-place construction of a cable-stayed bridge and a counterweight system thereof. Background technique

[0002] At present, in terms of engineering construction design in the world, when crossing natural landforms such as valleys, rivers, ravines, and sea-crossing bridges, several main bridge forms such as cable-stayed bridges, suspension bridges, and long-span tied arch bridges are adopted. It is the most widely used bridge form in recent years. A cable-stayed bridge is mainly composed of a foundation, a main tower, a main girder, and stay cables.

[0003] The construction of concrete main girders of cable-stayed bridges mostly adopts the suspension casting of front fulcrum hanging baskets. It will intersect with the dam of the river, and the external factors cannot be ch...

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