Variable-diameter half grouting sleeve and construction method thereof

Abstract

The invention provides a variable-diameter half grouting sleeve and a construction method thereof. A seamless steel pipe is adopted as a body pipe, the inner wall of the body pipe is a concave-convex surface, the upper end of the body pipe is connected with the large-diameter end of a conical pipe, and the small-diameter end of the conical pipe is connected with one end of a cylindrical pipe. The construction method includes the steps that 1, the variable-diameter half grouting sleeve is manufactured; 2, a machining die is manufactured; 3, the upper portion of the short pipe in the step1 is heated; 4, the heated part of the short pipe is placed into a groove in a lower die, and an upper die is placed on the heated short pipe; 5, a grout injecting hole and a grout discharging hole are formed in the body pipe; 6, a connecting steel bar is inserted into the cylindrical pipe of the variable-diameter half grouting sleeve; 7, the variable-diameter half grouting sleeve, which is connected with the steel bar, in the step6 is placed into the die of a prefabricated component, and after concrete is poured for curing, and the steel bar connected with a building or the prefabricated component is placed into the body pipe to be connected after pouring. The variable-diameter half grouting sleeve makes tight contact with the connecting steel bar through extrusion to overcome the defects in the prior art.

Description

technical field [0001] The invention relates to a steel bar connector used in building components, and is a variable-diameter semi-grouting sleeve and a construction method thereof. Background technique [0002] The currently used grouting sleeve is a cast iron, which is composed of a cylinder body and a cone body with equal diameters. The inner cavity wall of the cylinder is provided with annular bumps, the inner wall of the cone cylinder is provided with threads, and the cylinder body is opened. Grouting hole and grouting hole, this kind of grouting sleeve directly puts the cylinder body into the steel bar during construction and then grouts, and the cone body needs to be placed in another connecting steel bar, because the steel bar that the grouting sleeve needs to connect is in the prefabricated component Therefore, at the construction site, the ribs on the steel bar must be stripped clean, and one end of the steel bar is cold-rolled into wire, and then the steel bar is ...

AI Technical Summary

Problems solved by technology

[0002] The currently used grouting sleeve is a cast iron, which is composed of a cylinder body and a cone body with equal diameters. The inner cavity wall of the cylinder is provided with annular bumps, the inner wall of the cone cylinder is provided with threads, and the cylinder body is opened. Grouting hole and grouting hole, this kind of grouting sleeve directly puts the cylinder body into the steel bar during construction and then grouts, and the cone body needs to be placed in another connecting steel bar, because the steel bar that the grouting sleeve needs to connect is in the prefabricated component Therefore, at the construction site, the ribs on the steel bar must be stripped clean, and one end of the steel bar is cold-rolled into wire, and then the steel bar is threaded and then matched with the thread on the inner wall of the cone section in the grouting sleeve. The biggest disadvantage of the grouting sleeve is that the threads must be processed on the connecting steel bars during construction.

On-site thread processing is complicated, and the quality standard is difficult to control. When inserting the threaded steel bar end into the threaded section of the grouting sleeve, a torque wrench must be used, which is difficult to operate. Due to the different technical levels of the operators, the steel bar is inserted into the grouting sleeve. The length of the barrel must meet the requirements of national standards, and it is extremely difficult to achieve a high pass rate

Another deficiency of this grouting sleeve is that the manufacturing cost is high

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