A threaded steel semi-grouting sleeve joint

Abstract

The invention belongs to the technical field of sleeve joints, in particular to a threaded steel semi-grouting sleeve joint; including a fixed sleeve; one end of the fixed sleeve is provided with a tapered threaded hole, and the end of the fixed sleeve is provided with an annular sealing ring ; The side wall of the fixed sleeve is provided with a spiral groove; the spiral groove is helically inserted with an elastic spiral skeleton; an elastic fiber layer is arranged between the elastic spiral skeleton and the spiral groove; A plurality of extruded expansion columns, and the outer wall of the extruded expansion column is provided with water absorption holes; the interior of the extruded expansion column is provided with a water absorption expansion layer, and the cement expansion agent is filled between the water absorption expansion layer and the extrusion expansion column; and Through the cooperation of the elastic spiral skeleton and the extruded expansion column, the grouting cement can be tightly bonded to the inner wall of the rebar and the fixed sleeve when it is set, preventing external vibration or stretching from causing the connection of the fixed sleeve Detachment or breakage occurs.

Description

technical field [0001] The invention belongs to the technical field of sleeve joints, in particular to a threaded steel semi-grouting sleeve joint. Background technique [0002] With the popularization and application of prefabricated concrete structures, one of its key technologies—reinforcement connection technology has attracted more and more attention. At present, there are mainly two types of grouted rebar joints: full grouted rebar joints and semi-grouted rebar joints; The fully grouted steel bar joint has defects such as the length of the sleeve is long, and the sealing and positioning are difficult. [0003] And then make existing threaded steel when connecting, adopt semi-grouting type sleeve to connect mostly, and existing semi-grouting sleeve when connecting threaded steel, because the mode of laying of threaded steel and the environment of laying are different, and then make There will also be differences in the use of half-grout joints. [0004] It is used in ...

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Problems solved by technology

[0006] In order to make up for the deficiencies of the prior art, the invention proposes a threaded steel semi-grouting sleeve joint. The invention is mainly used to solve the problem that the existing semi-grouting joints are easily connected due to the strong wind force in mountainous areas, which may easily cause damage to the utility poles. The phenomenon of winding occurs at the top, and the bonding strength between the grouting cement and rebar and the inner wall of the fixed sleeve is low, which leads to the easy detachment or relative sliding of the joint connection of the half-grouting joint, which leads to the support column after pouring. Cracking occurs at the connection of rebar

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