Steel bar connection grouting-free sleeve device of fabricated concrete structure

Abstract

The invention relates to the field of fabricated buildings, and particularly relates to a steel bar connection grouting-free sleeve device of a fabricated concrete structure. The steel bar connection grouting-free sleeve device comprises a boss, a sleeve and a high-strength bolt; the sleeve is provided with a sealing ring and a clamping groove; the high-strength bolt is provided with a nut, a screw, a plum head, a threaded protection arm and a high-strength steel pipe; the boss and the sleeve are made of low-yield-point steel; the high-strength bolt is made of high-strength steel; and the boss is in a crescent shape. The sleeve is extruded and formed through the high-strength bolt, the positive pressure of the contact face is increased by applying pre-tightening force of primary screwing and final screwing to the high-strength bolt, and accordingly steel bars are tightly attached to the boss to be fixed. Filling is not needed in the construction process, and compared with an existing grouting sleeve, the steel bar connection grouting-free sleeve device can avoid the phenomenon of material waste in the grouting process and meanwhile has the beneficial effects that labor force is reduced, the construction efficiency is improved, and the construction difficulty is lowered.

Description

technical field [0001] The invention relates to the field of prefabricated buildings, in particular to a grout-free sleeve device for steel bar connections of prefabricated concrete structures. Background technique [0002] Nowadays, the connection technologies of prefabricated components include grouting sleeve connection, grout anchor connection, and sleeve extrusion connection, but no matter which method is adopted, the phenomenon of sleeve connection misalignment cannot be avoided, so as to provide a good foundation for the engineering of prefabricated buildings. Quality buries safety hazards. [0003] Although grouting sleeve connections are commonly used, the existing grouting sleeves are mainly composed of specially processed sleeves, matching grouting materials and steel bars. This combination often has insufficient anchoring force of steel bars, difficulty in assembling steel bars, and on-site Difficult to control and other issues. [0004] The existing grouting s...

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Problems solved by technology

[0002] Nowadays, the connection technologies of prefabricated components include grouting sleeve connection, grout anchor connection, and sleeve extrusion connection, but no matter which method is adopted, the phenomenon of sleeve connection misalignment cannot be avoided, so as to provide a good foundation for the engineering of prefabricated buildings. Quality buries safety hazards

[0003] Although grouting sleeve connections are commonly used, the existing grouting sleeves are mainly composed of specially processed sleeves, matching grouting materials and steel bars. This combination often has insufficient anchoring force of steel bars, difficulty in assembling steel bars, and on-site uncontrollable issues

[0004] The existing grouting sleeve injects fast-hardening non-shrinkage grouting material when connecting the steel bar, and relies on the bonding and occlusion between the materials to connect the steel bar and the sleeve. During the connection, the eccentric defect of the steel bar often occurs, and the staff often There is a waste of grouting materials, complex construction, large manpower consumption, and insufficient grouting, which lead to unqualified grouting quality

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