Large-span ultra-wide steel box girder bridge construction linear control technology

Abstract

The invention provides a large-span ultra-wide steel box girder bridge construction linear control technology. The technology comprises the following steps: S1, determining design technical standards:determining the design technical standards of road grade, design vehicle speed, bridge floor longitudinal slope, bridge floor transverse slope, bridge structure design reference period, bridge structure design service life and bridge design safety grade; S2, determining bridge installation linear parameters, S4 (after S3), linear influence factor control, and S5, steel arch closure linear control. Theoretical control data during installation are adjusted, the influence of factors such as environment temperature changes is avoided, it is guaranteed that all data of the full-bridge axis, mileage and elevation three-dimensional coordinates are within the control range, and the full-bridge forming line type of the bridge is achieved.

Description

technical field [0001] The invention belongs to the technical field, and relates to a construction line shape control technology of a long-span and ultra-wide steel box girder bridge. Background technique [0002] In recent years, the development of my country's steel structure bridge construction projects has become more and more intense, and its scale has become larger and larger, with the characteristics of large vertical spans, wide horizontal spans, and complex line shapes. With the development of bridges, its role is not only the technical practicability of crossing rivers, structures, etc., but also more and more pursuit of the integration of beauty and environment. For the line type, we must plan ahead, especially in the aspect of construction process control. [0003] During the construction process, due to various reasons such as design parameter errors, construction errors, measurement errors, and environmental impacts, there will be a certain deviation between t...

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Problems solved by technology

[0003] During the construction process, due to various reasons such as design parameter errors, construction errors, measurement errors, and environmental impacts, there will be a certain deviation between the actual state of the bridge during the construction process and the theoretical size. and adjustments, it will be difficult to guarantee the safety of the structure after the bridge is completed, especially for load-bearing steel arch structures, the control of line shape and closing is even more difficult

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