Pier-extruded and half-grouted steel bar sleeve, connecting structure and construction method

Abstract

The invention provides a pier-extruded and half-grouted steel bar sleeve, a connecting structure and a construction method thereof. The sleeve is a hot-rolling seamless steel pipe, a grouting hole and a slurry discharging hole are formed in the sleeve wall of the sleeve, an annular inner projection is distributed between the grouting hole and the slurry discharging hole, one end of the sleeve is an extrusion end, the rest part is a grouting-anchoring end, the inner diameter of the extrusion end is equal to the outer diameter of connected steel bars and smaller than the inner diameter of the grouting-anchoring end, and the grouting hole, the slurry discharging hole and the annular inner projection are positioned at the grouting-anchoring end. The steel bars are connected through the half-grouted steel bar sleeve, part of one end of the sleeve is connected with the steel bar by an extrusion connection technology, and the other part of the sleeve is still connected with the steel bar in a grouting mode. The connecting structure can be widely applied to the steel bar connection of prefabricated concrete columns in a multi-high-layer prefabricated assembly type concrete framework structure, a shear wall structure or a framework shear wall structure as well as the horizontal steel bar connection of prefabricated concrete beams, the steel bar connection of prefabricated concrete shear walls and steel bar connection in the conventional reinforcing engineering.

Description

technical field [0001] The invention relates to a grouting sleeve and a construction method thereof. Background technique [0002] At present, in the prefabricated and assembled reinforced concrete structure system, the design method equivalent to cast-in-place is mostly used, which puts forward high requirements on the reliability of the reinforcement connection between prefabricated components. At the same time, the following problems still exist in this system: [0003] 1. The overlapping and welding connection methods of steel bars used in traditional cast-in-place structures are not suitable for the process requirements of prefabricated component assembly; [0004] 2. The existing cast steel grouting sleeve adopts precision casting process, which is prone to casting defects, difficult to guarantee quality and high cost; [0005] 3. The existing grouting sleeve processed by mechanical cutting of steel rods has a large cutting workload and high cost; [0006] 4. The ex...

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Problems solved by technology

[0007] The purpose of the present invention is to provide a pier head extruded semi-grouting steel bar sleeve, connection structure and construction method thereof, to solve the technical problems of low processing efficiency and complicated process of the existing grouting sleeve; and to solve the problem of improving the reliability of the steel bar connection question

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