Intelligent monitoring method for stage construction of super-large-span cable-stayed bridge

Abstract

The embodiment of the invention provides an intelligent monitoring method for stage construction of a super-large-span cable-stayed bridge. The intelligent monitoring method comprises the steps that two tower piers are arranged on a tower base; a first main beam section is arranged on a lower cross beam, a support is arranged between the first main beam section and the lower cross beam, and an adjusting hole is formed in the side face, close to a middle tower column, of the first main beam section; one end of an adjusting assembly is connected to the adjusting hole, and a memory alloy wire is wound around a winding groove and the other end of the adjusting assembly; a displacement sensor is arranged on the side face of the first main beam section; distance information between the first main beam section and the middle tower column is obtained through monitoring of the displacement sensor; and under the condition that the distance information is different from the designed distance information, alarm information is sent out, and the distance between the first main beam section and the middle tower column is adjusted through an adjusting nut, so that the distance between the first main beam section and the middle tower column is equal to the designed distance. According to the intelligent monitoring method for stage construction of the super-large-span cable-stayed bridge, the distance between the first section of main beam and the cable bent tower can be explored in the construction process of the cable-stayed bridge.

Description

technical field [0001] The invention relates to the technical field of bridge construction survey, in particular to an intelligent monitoring method for phase construction of a super-long-span cable-stayed bridge. Background technique [0002] Cable-stayed bridges, also known as cable-stayed bridges, are mainly composed of cable towers, main girders, and cable-stayed cables. It is a bridge in which the main girder is directly pulled on the bridge tower by many cables. It is a structural system composed of a pressure-bearing tower, a tension-bearing cable and a bending-bearing beam. It can be regarded as a multi-span elastically supported continuous beam with cables instead of piers. It can reduce the bending moment in the beam body, reduce the building height, reduce the structural weight and save materials, and is especially suitable for being used as a cross-sea bridge to facilitate the passage of ships. [0003] However, in the current technology, in the construction st...

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Problems solved by technology

[0003] However, in the current technology, in the construction stage of the main beam, the first section of the main beam is mounted on the cross beam of the cable tower, and then the multi-end main beam is gradually poured through the hanging basket to form the closing of the main beam. The overall construction period of the main beam is relatively long. The main girder of the first section is subjected to changes in the stress state, and the main girder of the first section may be displaced on the beam of the cable tower, which will affect the construction quality of the entire cable-stayed bridge

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