Precast beam top plate linear control construction method

Abstract

The invention discloses aprecast beam top platelinear control construction method. The method is suitable for bridge precastwith flange plates such as T beams and box beams. The method has the characteristics that (1) devices such as precast beam plane linear adjustment and beam top cross slope adjustment scales are easy to machine and convenient to install; (2) the beam top cross slope adjustmentscale device is more convenient and safer compared with a traditional method for measuring and adjusting the beam top cross slope through a level gauge, and the construction measuring cost is reduced;(3) the operation is simple, convenient and fast, the template control precision is high, the linear quality of the precast beam top plate can be greatly improved, and the cross interference with thetemplate installation construction is avoided; and (4) the quality problems that the precast beams intrude into a bridge deck pavement structure layer, the widths of joints between the precast beamsof adjacent bridge spans are different, bridge side lines do not meet the design line shape requirements and the like due to insufficient linear control of the precast beam top plate can be effectively prevented, and the bridge structure safety risk caused by the quality problems is reduced.

Description

technical field [0001] The invention relates to the related field of bridge prefabricated construction, in particular to a construction method for controlling the linear shape of a prefabricated beam top plate. Background technique [0002] In the construction of highway and bridge projects, the superstructure of most bridges is prefabricated. In the process of bridge prefabrication, it is often easy to ignore the linear quality of the prefabricated girder roof. When prefabricating straight-line bridges, because the cross slope of the prefabricated girder top is consistent and does not change, the outer edge of the side beam is straight and parallel to the beam axis, and the structural edge of the beam end is perpendicular to the beam axis. , at this time the linear quality of the roof is easy to control; but when prefabricating bridges with flat curves, the cross slope of the beam top changes due to the design superelevation or superelevation gradient, the outer edge of the...

AI Technical Summary

Problems solved by technology

In the process of bridge prefabrication, it is often easy to ignore the linear quality of the prefabricated girder roof. When prefabricating straight-line bridges, because the cross slope of the prefabricated girder top is consistent and does not change, the outer edge of the side beam is straight and parallel to the beam axis, and the structural edge of the beam end is perpendicular to the beam axis. , at this time the linear quality of the roof is easy to control; but when prefabricating bridges with flat curves, the cross slope of the beam top changes due to the design superelevation or superelevation gradient, the outer edge of the side beam is curved and not parallel to the beam axis, and the sideline of the beam end structure There is a certain oblique angle with the beam axis. The above phenomenon is more obvious when the radius of the flat curve is smaller. If effective control is not implemented, it will seriously affect the appearance of the bridge, and even affect the structural quality and safety.

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