Single-leaning-tower cable-stayed bridge construction control method

Abstract

The invention provides a construction control method for a single-leaning-tower cable-stayed bridge. In the construction process, multiple control means of supporting active jacking force, stay cable tensioning force and main beam balance weight are adopted. On the basis of a finite element model, the maximum stress safety margin in the structure construction process is taken as the principle, the complexity of construction reduction is considered, and the optimal jacking force, inhaul cable tensioning force and main beam balance weight scheme is obtained. The construction control method comprises the following steps: establishing a full-bridge refined construction process finite element model, and accurately simulating the influence of a support jacking force, an inhaul cable tension force and a main beam counterweight on structure construction stress in the model; in the model, the optimal combination scheme of the optimal jacking force, the inhaul cable tension force and the main beam counterweight is obtained through sensitivity analysis. The method has the beneficial effects that the construction difficulty of the leaning tower is reduced, the stress and the line shape of the leaning tower in the construction process are more accurately controlled by adopting multiple control means in combination with a finite element method, and the safety of the structure construction process is ensured.

Description

technical field [0001] The invention belongs to the technical field of construction, and particularly relates to a construction control method of a cable-stayed bridge with a single leaning tower. Background technique [0002] The cable-stayed bridge is a high-order statically indeterminate composite system bridge. Its superstructure is composed of three parts: the main beam, the cable-stayed cable and the bridge tower. Different from other system bridges, the cable-stayed bridge can be adjusted by adjusting the cable-stayed The cable force is used to change the force state and line shape of the main beam and the main tower. People's pursuit of bridge shape is getting higher and higher, and artistic bridges can be recognized and admired by people. Bridge engineers have designed a cable-stayed bridge with a single leaning tower, which not only inherits the lightness of ordinary cable-stayed bridges, but also The smooth lines and the sloping leaning tower bring asymmetrical b...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to overcome the difficulty in the construction of the inclined tower and the difficulty in controlling the stress and linearity of the inclined tower in the construction of the existing single leaning tower cable-stayed bridge

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