Prefabricated assembled type upright post connecting structure and construction method thereof

Abstract

The invention discloses a prefabricated assembled upright post connecting structure, which is characterized in that a plurality of steel bar connecting sleeves are pre-embedded at the lower end of theprefabricated upright post. A groove is reserved at the top of the bearing platform. The bottom surface of the bearing platform groove is provided with reserved steel bars extending upwards. The prefabricated upright post inserts into the reserved groove at the top of the bearing platform. The reserved steel bars of the bearing platform extending from the bottom surface of the reserved groove ofthe bearing platform and the steel bar connecting sleeves embedded at the lower end of the prefabricated upright post are connected through grouting. Concrete is fully filled between the reserved groove of the bearing platform and the prefabricated upright column to form a complete structure. According to the invention, the special connection structure design and construction technology are used to ensure the reliable connection of the prefabricated upright post and the bearing platform, so that no weak cross section is formed at the bottom of the column. The connection performance requirementunder unfavorable conditions such as strong earthquake and the like is met.

Description

technical field [0001] The invention relates to the technical field of bridge engineering, in particular to a prefabricated assembled component connection structure and a construction method thereof. Background technique [0002] Because the cast-in-place construction of the bracket occupies a large area and has a great impact on the environment, it is difficult to meet the requirements of green and rapid construction; while the prefabricated bridge has a high degree of factoryization, good standardized production quality, fast construction speed, low project cost and environmental protection. It has gradually been popularized and applied in the upper and lower structures of bridges. The most critical technical difficulty in implementing prefabricated construction of the lower columns of bridges lies in the structural treatment of the connection between the column roots and the caps. [0003] In the prefabricated assembly structure of the prior art, the connection between t...

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Problems solved by technology

[0004] Due to the large size of the grouting sleeve used for bridges, the outer diameter of the connecting sleeve for a single steel bar is generally 80-100 mm, resulting in poor matching and synergistic mechanical performance between the sleeve and the concrete section of the column, especially the poor combination with the concrete of the outer protective layer. Under hysteretic reciprocating load, the concrete protective layer at the bottom of the column is easy to fall off

At the same time, since the prefabricated column assembly joint is located at the most unfavorable stress-bearing part at the junction of the column bottom and the cap top, under the action of longitudinal horizontal force and earthquake loads, repeated tensile and compressive stresses appear on the edge of the above-mentioned reinforced concrete column bottom assembly joint, forming Weak link, poor mechanical performance of structure such as earthquake resistance

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