Replacement and location method of externally prestressed anchor pads for segmental beams

Abstract

The invention discloses a method for replacing and positioning an external prestressed anchor backing plate of a segmental beam, comprising steps: 1. Installation and preliminary positioning of a straight conduit: after the stiff skeleton used for construction of a segmental beam is installed, according to the pre-designed The installation position of the prestressed anchor backing plate at the end of the section beam is to install a straight conduit on the stiff skeleton; the inner diameter of the straight conduit is greater than the diameter of the installation hole opened on the prestressed anchor backing plate; two, steel cage binding ; 3. Replacement and precise positioning of the prestressed anchor backing plate: take out the straight pipe, install the prestressed anchor backing plate at the installation position of the straight pipe, and adjust the position of the prestressed anchor backing plate until the prestressed anchor backing plate is placed Backing plate installed in place. The method has the advantages of simple steps, reasonable design, convenient construction, and good application effect. It can easily and quickly complete the positioning process of the external prestressed anchor pad, and can effectively reduce the construction difficulty and greatly improve the construction efficiency.

Description

technical field [0001] The invention belongs to the technical field of bridge construction, and in particular relates to a method for replacing and positioning an external prestressed anchor plate of a segmental beam. Background technique [0002] In the process of bridge construction, when constructing the top section of the bridge pier (also called 0# section), the construction process is relatively complicated, and there are many embedded parts on the top section of the pier, including external prestressed embedded parts, permanent finish-rolled rebar Embedded parts, temporary prestressed embedded parts, etc., and when the external prestressed anchor plate is accurately positioned, the construction is difficult and time-consuming, which affects the entire construction period. Wherein, the external prestressed anchor backing plate refers to the prestressed anchor backing plate for the external prestressed steel bars, and the prestressed anchor backing plate is provided wit...

AI Technical Summary

Problems solved by technology

[0004] First, when the external prestressed anchor plate is positioned, due to the heavy weight of the anchor plate, when the anchor plate is positioned on the rigid skeleton, the anchor plate tube is seriously eccentric (lower head phenomenon), the time required for positioning is long, and the risk factor is large;

[0005] Second, it is required to reserve precise positioning space around the external prestressed pipe when binding the steel bars, which has higher requirements for workers and increases the difficulty of the entire steel bar binding;

[0006] Third, when tying the outermost steel mesh sheet, the length of the steel hook after anchoring cannot meet the design requirements due to the existence of the anchor plate;

[0007] Fourth, due to errors caused by steel tire clamps, hoisting and preliminary positioning, the adjustment space reserved for steel bar binding is not enough to allow the precise positioning of the anchor plate to meet the requirements

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