Bundled half-grouting constraint pulp anchor connecting method

Abstract

The invention relates to the field of civil engineering and environment and resource utilization. The bundled half-grouting constraint pulp anchor connecting method is suitable for connection of steelbars in fabricated buildings, in particular to steel bar connection in a prefabricated concrete column of bundled reinforcement. According to a bundled reinforcement prefabricated concrete column, bundles of bars are arranged at four corners of the column to replace a plurality of steel bars arranged at the circumference of the column. More than three steel bars are arranged at each edge of the reinforced concrete column, and therefore at least eight steel bars are needed. Pulp anchor connection can not be adopted due to size limitation. Sleeve connection is adopted, and at least eight steelbars are required. According to connection of bundled reinforcement prefabricated concrete upper and lower columns, the bundled half-grouting constraint pulp anchor connecting method is adopted. According to the method, the bundles of bars reserved by the bundled reinforcement prefabricated concrete lower column are inserted into reserved holes of the upper column, a high-strength grouting material is poured, and connection between the bundled reinforcement concrete upper column and lower column is achieved. Through connection, internal forces generated by vertical and horizontal loads on thecolumn can be effectively transferred, and the number of connections and anchoring length of vertical steel bars are reduced.

Description

technical field [0001] The invention relates to the fields of civil engineering, environment and resource utilization, and is suitable for the connection of steel bars in prefabricated buildings, especially for the connection of vertical steel bars in prefabricated concrete columns with clustered reinforcement. Background technique [0002] At present, ordinary restrained grout-anchor connection is widely used in the vertical connection of prefabricated concrete structures. This connection method has the advantages of safety, reliability and low cost. However, the current common restrained grout-anchor connection still has the following problems: (1) Too many steel holes are reserved, which makes assembly difficult and inefficient during construction. (2) If the diameter of the steel bar is thicker, the anchorage length of the reserved steel bar will be longer, which will make the fabrication, installation and construction of the component more difficult. Contents of the i...

AI Technical Summary

Problems solved by technology

However, the current common restrained grout-anchor connection still has the following problems: (1) The number of reserved reinforcement holes is too large, which makes the assembly difficult and the efficiency is low during the construction process

(2) If the diameter of the steel bar is thicker, the anchorage length of the reserved steel bar is longer, resulting in greater difficulty in the fabrication, installation and construction of the component

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