Steel tube sleeves used for prefabricated shear walls and columns and fabricating method for steel tube sleeves

Abstract

The invention discloses a steel tube sleeves used for prefabricated shear walls and columns. The steel tube sleeves used for the prefabricated shear walls and the columns comprises a steel tube (1) and built-in barbs, wherein the four barbs (2) used for anchoring steel bars are circumferentially arranged on the inner walls at the two ends of the steel tube (1); n groups of the built-in barbs are evenly arranged in the axial direction of the steel tube, n is greater than or equal to 1 group, and the built-in barbs are symmetrically arranged toward the middle face of the steel tube. Compared with the prior art, the steel tube sleeves used for the prefabricated shear walls and the columns are simple in structure, convenient to install, simple in fabrication and low in cost, meanwhile, connecting requirements for the steel bars in constructional engineering can be met.

Description

technical field [0001] The invention belongs to the technical field of building construction, and in particular relates to a steel pipe sleeve used for connecting steel bars and a preparation method thereof. Background technique [0002] In order to meet the seismic performance requirements of prefabricated concrete structures, when precast concrete components are spliced ​​and installed on site, the connection method and connection reliability of the main stressed steel bars between the prefabricated components become the key to the successful application of new prefabricated concrete structures. [0003] The currently known butt joint method of prefabricated concrete members mainly bearing steel bars and grout anchors is that the two steel bars to be connected are inserted into cylindrical cast steel sleeves, and the gaps are filled with high-strength non-shrinkage cement-based grouting material for full-grouting sleeve connection. method; or the sleeve of the slurry ancho...

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Problems solved by technology

[0004] For the butt connection of the stress-bearing steel bars of the above-mentioned known prefabricated concrete members, for the spiral continuous arc-shaped concave-convex corrugated rib full-grouting steel sleeve processed by rolling or spinning, the deformation resistance of the sleeve under axial tensile pressure is poor; The full-grouting steel sleeve with outer concave and inner convex is cut at intervals, and the cutting process is large, which directly increases the production cost; for the two connected steel bars, one is connected by slurry anchor and the other is connected by straight thread For semi-grouting cast steel sleeves or cylindrical semi-grouting steel sleeves with bottoms processed by cutting, the steel sleeves processed from round steel have too much cutting and processing, and one of the ends of the connected steel bars needs to be processed into straight threads , these all lead to increased processing and production costs, poor economic indicators, and also affect the large-scale promotion and application of the project

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