A reinforcement structure and construction method for the truncated connecting steel bars in the sleeve

Abstract

The invention discloses a reinforcing structure for truncation of connecting reinforcing steel bars in sleeves. The reinforcing structure is used for repairing sleeve grouting joints between prefabricated shear walls, at reinforcing positions, upper connecting parts of the two pre-bent connecting reinforcing steel bars are in lap joint with and welded to the single faces of the two sides of the outer walls of the lack-of-bar sleeves to form weld joints correspondingly, and lower connecting parts of the two pre-bent connecting reinforcing steel bars are in lap joint with and welded to the single faces of the two sides of the lower connecting reinforcing steel bars to form weld joints correspondingly; shear wall chiseling areas and floor chiseling areas are filled with ultrahigh-performanceconcrete; and the prefabricated shear walls and the adjacent lower layers of prefabricated shear walls are connected into a whole at the lack-of-bar sleeves through the upper connecting reinforcing steel bars, the lack-of-bar sleeves, the pre-bent connecting reinforcing steel bars, the lower connecting reinforcing steel bars, grouts, the weld joints and the ultrahigh-performance concrete. The invention further provides a reinforcing method for guiding construction and meeting the reinforcing requirement. The reinforcing structure is little in damage to the original structure, simple in reinforcing connection mode and controllable in cost.

Description

technical field [0001] The invention relates to the technical field of prefabricated buildings, in particular to a reinforcement structure and a construction method for truncated connecting steel bars in a sleeve. Background technique [0002] At present, most of the vertical connections of reinforced steel bars in my country's prefabricated concrete structures are connected by sleeve grouting, which is a method of inserting steel bars into metal sleeves embedded in prefabricated concrete components, and pouring high-strength, micro-expansion cement. The steel bar butt connection method realized by base grouting material. The connection nodes of prefabricated components are the theoretical weak links of prefabricated concrete structures, and the steel bars extending into the sleeves are the main bearers of the load transfer of different prefabricated components. Therefore, the grouting material in the sleeve and the protruding steel bars need sufficient anchoring length to e...

AI Technical Summary

Problems solved by technology

However, according to the test and research of the inventor team of this method, the results show that: the externally attached steel plate reinforcement method has a significant effect on the reinforcement of prefabricated shear wall components with insufficient grouting; The ductility, ultimate load, and initial stiffness of the force wall cannot meet the expected requirements

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