Vault deflection control method in catenary arch springing increased cross-section reinforcement construction

Abstract

The invention discloses a vault deflection control method in catenary arch springing increased cross-section reinforcement construction. Basic parameter values of a structure are obtained according toa design drawing; a cable is adopted to approximately replace a catenary; the deflection of the section of a vault when a unit force acts upon any section of a catenary arch is calculated; the deflection of the vault at the moment is calculated by using a reinforcement section length, which is determined by a construction scheme, and the cubic amount of desired concrete; and the deflection of thevault which is actually measured on site is compared with the calculated deflection. The vault deflection control method in the catenary arch springing increased cross-section reinforcement construction is used for constant section catenary hingeless arches. Compared with the existing most common finite element method, the vault deflection control method in the catenary arch springing increased cross-section reinforcement construction has the advantages that real-time control can be performed on the construction site under the coordination of a scientific calculator; the operation is simple;the realization is easy; and defects that the calculation time is long, parameters cannot be directly obtained to affect rules and so on due to the adoption of the existing commonly used finite element method are overcome. And meanwhile, according to the vault deflection control method in the catenary arch springing increased cross-section reinforcement construction, an analytic expression directly reflects the mechanical relation between the vault deflection value and each parameter of the structure to be beneficial for engineers to master the reinforcement design and the construction scheme.

Description

technical field [0001] The invention belongs to the field of bridge structure reinforcement construction process control, and in particular relates to a method for controlling the deflection of an arch during the reinforcement construction of a catenary arch foot with enlarged section. Background technique [0002] Arch bridges have a long history in our country, reflecting the level of bridge construction in our country. As both structure and architecture, arches are loved by people. Since the founding of the People's Republic of my country, a large number of arch bridges have been built in China. However, with the improvement of social industrial level, the increase of traffic load, and the influence of factors such as low original design standards and degradation of bridge material conditions, many arch bridges built before have become four. Class or V bridges, these bridges urgently need to be repaired and strengthened or demolished and rebuilt. From the perspective of ...

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Problems solved by technology

Since the founding of the People's Republic of my country, a large number of arch bridges have been built in China. However, with the improvement of social industrial level, the increase of traffic load, and the influence of factors such as low original design standards and degradation of bridge material conditions, many arch bridges built before have become four. Class or V bridges, these bridges urgently need to be repaired and strengthened or demolished and rebuilt

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