A kind of prefabricated bridge pier and its construction method

Abstract

The invention discloses a prefabricated bridge pier and a construction method thereof. The prefabricated bridge pier comprises a bridge pier body and energy consumption rebars arranged in the bridge pier body in the axial direction of the bridge pier body, the pier body is successively formed by assembling several segments from the bottom to the top, the segments comprises segment bodies, holes are formed in the side walls of the segment bodies, cast-in-place parts of the segments are formed by in-place casting, and the energy consumption rebars penetrate through the segments in turn in the axial direction of the bridge pier body and are respectively connected with gaps of the segment bodies and integrally poured with the cast-in-place parts of the segments. According to the prefabricatedbridge pier and the construction method thereof, free segments of the energy consumption rebars arranged in the bridge pier are discontinuous, therefore the telescopic amount of the energy consumptionrebars can be increased in the axial direction, the fixing mode of the energy consumption rebars in the axial direction of bridge pier is also discontinuous, therefore the energy construction effectof the energy construction rebars is also not affected in the radial direction, the energy consumption effect of the energy consumption rebars in the axial direction and radial direction is fully developed, energy consumption is stable, and the effect is good.

Description

technical field [0001] The invention relates to the technical field of bridge engineering, in particular to an assembled bridge pier and a construction method thereof. Background technique [0002] Due to the advantages of rapid construction and self-resetting ability, dry joint segmental assembled piers have been applied in some river-crossing and sea-crossing bridges, including the Hong Kong-Zhuhai-Macao Bridge and the Canadian Confederation Bridge. This type of bridge pier divides the pier body into several sections vertically, the longitudinally stressed steel bars are broken at the joints of the sections, and the sections are connected by "dry joints" or filled at the joints. Epoxy resin is used to improve the durability of the piers, and then the segments are connected into a whole by post-tensioning. Scholars at home and abroad have found through experiments and theoretical studies that dry-joint segment-assembled piers have poor energy dissipation capacity under ear...

AI Technical Summary

Problems solved by technology

Scholars at home and abroad have found through experiments and theoretical studies that the dry joint segment assembled piers have poor energy dissipation capacity under earthquake excitation, and are prone to crushing at the bottom segment

In order to improve the energy dissipation capacity of piers assembled with dry joint segments, the most widely used method in engineering practice and scientific research is to build energy-dissipating steel bars in assembled bridge piers with dry joint segments. When the energy-dissipating steel bars are used for earthquake excitation, Dissipate the shear force between the joints of the segments, but when an earthquake occurs, the energy generated is in multiple directions, and it is still relatively obvious in the axial direction of the pier. The sections are poured at the same time, so the energy-dissipating steel bars are fixed in the axial direction of the pier, there is no space for expansion and contraction, the energy-dissipating capacity in the axial direction is poor, and there is basically no energy-dissipating effect, even in the axial direction of the earthquake When excited, the energy-dissipating steel bars may have an irreversible damage effect on the interior of the segment due to the fixed connection with the segment, making it difficult to replace

If the rest of the energy-consuming devices are added, the manufacturing cost of the pier will be increased, and it will also have a relatively large impact on its structure, which is not worth the candle

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