Displacement control system and application method of cable crane tower frame for arch bridge construction

Abstract

The invention discloses an arch bridge construction cable tower crane frame displacement control system and a using method. The arch bridge construction cable tower crane frame displacement control system comprises a displacement detection device, a tension device and a controller, the displacement detection device is arranged at the top of a tower frame, the tension device is arranged at the ground anchor end of a wind cable, and the controller controls the magnitude of tension applied to the wind cable by the tension device according to tower frame displacement data fed back by the displacement detection device. When the tower frame is displaced, the tension device can apply the tension to the wind cable, therefore it is ensured that the tower frame is in a perpendicular state or a smalldisplacement deflection state, and since the wind cable can be timely tightened according to the displacement of the tower frame, the wind cable with large rigidity and the large diameter is not needed. The arch bridge construction cable tower crane frame displacement control system can achieve active control of the displacement of the tower frame, optimal control can be achieved according to actual displacement conditions of the tower frame, the safety of the tower frame when the stress is high is ensured, the control effect of the system is good, construction materials are saved, and largedisplacement and repeated deformation of an arch rib are avoided.

Description

technical field [0001] The invention relates to the technical field of bridge construction, in particular to a displacement control system and a use method of a cable crane tower frame for arch bridge construction. Background technique [0002] During the construction of long-span arch bridges, cable hoisting systems are often used to hoist segmental trusses and segmental girders, and cable-stayed buckles are used to hang assembled arch rib cantilever segments. During the hoisting of segmental trusses and segmental main girders, as well as the assembly process of arch rib cantilever, the weight of heavy objects will cause the tower to displace to the lifting side of the cable crane tower and the hanging side of the cable-stayed buckle, thus affecting Tower safety. At present, wind cables are used to control the displacement of the tower during construction, that is, multiple steel strands are connected to the tower at one end and anchored to the ground at the other end to r...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a method for controlling tower displacement by using large-rigidity and large-diameter wind cables in the construction process of long-span arch bridges, which has the problems of poor tower displacement control effect and waste of materials. The cable crane tower displacement control system for arch bridge construction can actively control the displacement of the tower to achieve optimal control according to actual needs and ensure the safety of the tower under better stress. Its control effect is good and construction materials are saved

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