Extrusion prestress pier body formwork deformation preventing device and design method thereof

Abstract

The invention relates to the technical field of pier body formwork fixing, and provides an extrusion prestress pier body formwork deformation preventing device and a design method thereof. The extrusion prestress pier body formwork deformation preventing device comprises prestress beams and connecting pieces which are in one-to-one correspondence with the side walls of a pier body formwork, and every two adjacent prestress beams are detachably and fixedly connected through the corresponding connecting piece; each prestress beam is of an arc-shaped structure, and the two ends of each prestress beam extend in the direction away from the outer wall of the pier body formwork. A pressing plate is arranged on the side, close to the outer wall of the pier body formwork, of each prestress beam, and each prestress beam abuts against the outer wall of the pier body formwork through the pressing plate. The two adjacent prestress beams are connected and fixed through the connecting pieces, and under the matching action of the prestress beams of the arc-shaped structures and the connecting pieces, stable prestress can be provided for the pier body formwork so as to counteract side pressure applied to the pier body formwork by concrete when the concrete is poured; and the situation that concrete slurry leaks out due to deformation of the pier body formwork during pouring is prevented.

Description

technical field [0001] The invention relates to the technical field of pier body formwork fixing, in particular to an extruded prestressed pier body anti-formwork deformation device and a design method thereof. Background technique [0002] Bridge piers are substructures that support the bridge span structure and transmit dead loads and vehicle live loads to the foundation, usually including a top hat and a pier body. [0003] The existing pier body is usually poured section by section from bottom to top during pouring, and the pier body formwork is often used to limit the shape of the pier body when pouring each section of pier body. In the existing construction method, after the pier formwork is installed, the pier formwork is often further reinforced by installing planks on the outer wall of the pier formwork. However, in the process of actually pouring concrete, in order to speed up the construction progress, the pier body of the lower section is poured and before the c...

AI Technical Summary

Problems solved by technology

However, since the pier formwork of two adjacent pier sections is often installed independently, and the concrete will exert a large lateral pressure on the pier formwork when pouring concrete, it is very likely that the pier formwork will be deformed. Once the pier The deformation of the body formwork will cause a large gap between two adjacent pier body formworks, so that the concrete slurry will leak from the gap, affecting the construction quality and construction period

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