Post-earthquake rapid repair of precast concrete column feet and its construction and maintenance methods

Abstract

The invention relates to a prefabricated concrete column base used for rapid restoration after earthquakes, and a construction and maintenance method thereof. The column base comprises a steel baseboard provided with openings, a prefabricated concrete column shaft, a base mortar layer and a post-cast bottom layer floor, ground bolts traverse through the openings of the steel baseboard and fix the steel baseboard to the base mortar layer, and tic-tac-toe reinforcements are above the steel baseboard, and are arranged around the bottom of the prefabricated concrete column shaft in a tic-tac-toe form. The construction method comprises the following steps: connecting the steel baseboard with the openings with longitudinal reinforcements in the prefabricated concrete column shaft in a welding mode, and completing pouring of the prefabricated concrete column shaft; and carrying out foundation leveling, hoisting the concrete column shaft and the steel baseboard, allowing the ground bolts to traverse through the openings of the perforated steel baseboard in order to fasten the steel baseboard to the base mortar layer, arranging the tic-tac-toe reinforcements at the bottom of the concrete column shaft, and pouring the ground layer floor. The column base has the advantages of good integrity, strong resistance to horizontal load, easy realization of the construction quality control, and low cost.

Description

technical field [0001] The invention belongs to the anti-seismic field of construction engineering, and in particular relates to a post-earthquake rapid repair prefabricated concrete column foot and a construction and maintenance method thereof. Background technique [0002] The connection of existing prefabricated concrete components is mainly divided into two types according to the construction method: dry connection and wet connection. Among them, the wet connection is the component connection realized by on-site wet operation methods such as grouting and partial cast-in-place, such as sleeve grouting and cast-in-place joint connection. Conversely, dry connection means the connection of components that do not use wet working methods, such as welding, cog connection, column shoe connection, etc. [0003] The above two connection methods have their own advantages and disadvantages: (1) Wet connection is the most commonly used connection method at present. The main advantag...

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Problems solved by technology

[0003] The above two connection methods have their own advantages and disadvantages: (1) Wet connection is the most commonly used connection method at present. The main advantages of this method are: excellent integrity and relatively good seismic performance; It is not easy to construct and the quality is not easy to control; (2) The advantages of dry connection mainly include: simple construction and easy quality control; the main disadvantages are: poor integrity, poor stress distribution at the joint, and less than ideal seismic performance

[0004] Moreover, the existing wet and dry connections do not have the ability to quickly repair after an earthquake

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