Arch rib cable-stayed buckling and hanging suspension splicing method capable of dynamically correcting deviation

Abstract

The invention discloses an arch rib cable-stayed buckling and hanging suspension splicing method capable of dynamically correcting deviation. Feedback control can be carried out according to the actually measured displacement value of the current suspension splicing section; under the condition that an actually measured value and a theoretical value have deviation, according to the provided arch rib cable-stayed buckling suspension splicing method, re-optimization can be carried out through a dynamic feedback system; a new arch rib section buckling displacement control value is obtained, so that construction is efficiently guided, the situation that a deviation value is corrected by frequently tensioning an adjusting cable in a traditional method is avoided, the construction period delay and the fatigue loss of a temporary buckling cable caused by repeated adjustment of the buckling cable in the traditional method are overcome, and the probability of disastrous consequences due to breakage of the temporary buckling cable is reduced; the displacement of the finished bridge is ensured to meet the target requirement, meanwhile, the delay of the construction period caused by displacement adjustment of each section is greatly reduced, and the economic benefit is remarkable.

Description

technical field [0001] The invention relates to the technical field of transportation bridge and culvert engineering, in particular to a method for dynamically rectifying an arch rib cable-stayed buckle-hanging suspension. Background technique [0002] The construction methods of the arch ribs of arch bridges can be divided into two categories, construction with supports and construction without supports. Construction with supports has relatively large limitations and is constrained by the span of the arch bridge and the construction environment on site. It is often used for small-span bridges to facilitate erection In the geographical environment of the bracket. Construction with supports is the best choice for arch rib construction of long-span arch bridges in recent years, and most of them are cable hoisting and suspension construction methods and swivel construction methods. It is obviously difficult to implement the swivel construction method for super-long-span bridge...

AI Technical Summary

Problems solved by technology

Academician Zheng Jielian once proposed that the construction of arch bridges is economical and practical, but if the cost of temporary facilities for the construction of arch bridges can be saved, it will bring great changes to the development of arch bridges

If one’s pursuit process is the same as the theoretical value, the construction period will be affected, which will bring additional economic costs. If the deviation is ignored, it will affect the final linear quality after loosening the cable and even affect the closure of the arch rib. How to have both is a problem that plagues builders

For example, the conventional zero-moment arch rib cantilever control method needs to readjust the buckle cables of all completed segments every time an arch rib segment is constructed. Since the buckle cables generally use high-strength steel strands, for long-span arch bridges Normally there are thousands of steel strands, each construction section needs to be adjusted, and the time cost is huge

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