A manufacturing method for semi-grouting sleeve steel bar joints with precise control of grouting fullness

Abstract

The invention discloses a method for manufacturing a semi-grouting sleeve rebar joint for accurately controlling grout plumpness. The semi-grouting sleeve rebar joint comprises a support fixing device, a semi-grouting sleeve, a thread-end connecting rebar, a grout-end connecting rebar, loosing grains and a sealing material. The method comprises the following steps: plugging a slurry outlet and a grouting port of the semi-grouting sleeve, connecting the thread-end connecting rebar with the top of the semi-grouting sleeve, and then reversely mounting on the support fixing device; inserting the grout-end connecting rebar from the center of a sleeve-end rebar insert port on the bottom of the semi-grouting sleeve and mounting on the support fixing device; filling a grout defect area with loosing grains, and then filling the sealing material, grouting and solidifying the grouting material, thereby finishing manufacturing. According to the invention, the grout plumpness can be accurately controlled and the operation is simple and convenient.

Description

technical field [0001] The invention relates to the technical field of prefabricated buildings, in particular to a manufacturing method for half-grouting sleeve steel bar joints that precisely controls the fullness of grouting. Background technique [0002] Semi-grouting sleeve steel bar connection is a commonly used node connection form in prefabricated concrete structures. Due to the late start of domestic prefabricated concrete structures, unskilled on-site personnel, improper operation, etc., the sleeve grouting is not full. Occurs, leaving a safety hazard to the prefabricated concrete structure. In order to study the influence of different grouting fullness on the connection performance of half-grouting sleeve, researchers need to make half-grouting sleeve steel bar joint specimens with different grouting fullness for experimental research. [0003] However, since the half-grouting sleeve is made of cast steel, it is a connection in a concealed space, and the fullness ...

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Problems solved by technology

[0003] However, since the half-grouting sleeve is made of cast steel, it is a connection in a concealed space, and the fullness of grouting cannot be controlled by direct observation, so how to control the fullness of grouting in the production of half-grouting sleeve steel bar joints with different grouting fullness become difficult

[0004] When the volume method is used to control the grouting fullness, it is difficult to calculate the volume of the grouting material under different fullness due to the annular ribs inside the half-grouting sleeve, the irregular surface of the connecting steel bars and the different insertion lengths.

When using the principle of connecting device to determine the fullness of grouting, the fullness is controlled by adjusting the liquid level of the grouting tube at the same height. Since the connecting device needs to be recycled after grouting, it needs to be removed before the grouting material solidifies, and it is difficult to remove it in time Blockage, easy to cause errors

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