V-type pier steel-structure bridge folding and ejecting system

Abstract

The invention provides a closing and pushing system for a V-shaped bridge pier rigid frame bridge, which includes a bridge pier and a cap, a groove is provided on the top of the cap, a spherical steel support is provided at the bottom of the groove, and the bottom of the pier is supported on the spherical steel support Above; between the pier and the cap, there are multiple limit jacks and push jacks in the longitudinal direction, and the push jacks and limit jacks are located on the opposite sides of the pier; between the pier and the cap, there are multiple horizontal jacks on both sides Jack, multiple I-beams are pre-embedded at the bottom of the pier, and the I-beam is located between two limit jacks or between two push jacks; the side wall of the groove is provided with a steel plate that matches the I-beam, After the push is completed, the steel plate and the I-beam are welded; the limit jack, the push jack and the transverse jack respectively press the pier tightly through the pads, and a steel pipe is arranged between the two transverse jacks, and a support limit steel bar is arranged at the bottom of the groove , pour concrete into the groove after the pushing is completed.

Description

technical field [0001] The invention relates to the technical field of bridge construction, in particular to a closing and pushing system for a V-shaped bridge pier rigid frame bridge. Background technique [0002] In recent years, since people have paid more and more attention to the beautiful design of bridges in addition to the safety, practicality and economic requirements of bridges, therefore, on the basis of conventional continuous girder bridges or continuous rigid frame bridges, designers People are more fond of rigid frame bridges with V-shaped piers. Compared with conventional rigid-frame bridges, this bridge has its own advantages: (1) From the analysis of the appearance of the bridge structure, the lower structure is V-shaped piers, and the upper structure is variable cross-section The concrete box girder structure or steel-concrete composite structure has a beautiful overall structure. The combination of the straight line of the V-shaped pier and the curve of t...

AI Technical Summary

Problems solved by technology

However, the continuous rigid frame bridge is a multiple statically indeterminate structure. Generally, the piers of rigid frame bridges are fixed on the caps. The piers of V-shaped rigid frame bridges are very rigid. Relatively large secondary internal forces will have a very adverse effect on the structural system, often failing to achieve the ideal bridge-forming effect, and greatly limiting the development of the span of continuous rigid frame bridges. In order to reduce the impact of secondary internal forces on the structural stress Impact, to offset the horizontal deviation of the pier top caused by the temperature difference of closing and the shrinkage and creep of concrete, it needs to be pushed when closing, how to push? How to design a jacking system? What issues should be paid attention to during the promotion process? At present, there is no convenient and fast closing and pushing system for V-shaped rigid frame bridge

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