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

Abstract

The invention provides a V-type pier steel-structure bridge folding and ejecting system which comprises a pier and a bearing platform. A groove is formed in the top of the bearing platform. A ball-type steel stand is arranged at the bottom of the groove. The bottom of the pier is supported on the ball-type steel stand. A plurality of limiting jacks and ejecting jacks are longitudinally arranged between the pier and the bearing platform and located on the two opposite sides of the pier. The two transverse sides between the pier and the bearing platform are each provided with a plurality of transverse jacks. A plurality of I-beams are embedded in the bottom of the pier and located between every two limiting jacks or ejecting jacks. Steel plates matched with the I-beams are arranged on the side wall of the groove. After ejecting ends, the steel plates and the I-beams are welded. The limiting jacks, the ejecting jacks and the transverse jacks eject the pier through cushion blocks. Steel pipes are arranged between every two transverse jacks. A stand limiting steel strip is arranged at the bottom of the groove. After ejecting ends, concrete is poured in the groove.

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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