Sleeve, prefabricated part connector, prefabricated part and prefabricated part assembly

Abstract

The invention discloses a sleeve, and a prefabricated part connector, a prefabricated part and a prefabricated part assembly which are constructed on the basis of the sleeve, and belongs to the fieldof assembly type buildings. The sleeve comprises a sleeve body and open ends positioned at two ends of the sleeve body, clamping pieces are arranged at the two open ends, and one ends of a grouting channel and an exhaust channel communicate with the through holes formed in the sleeve body. By assembling a port structure of an embedded part and a steel bar inserted into the port of the embedded part, fixing the steel bar and the sleeve by concrete or grouting material, and by the structure of the port of the sleeve and the shape of the end part of the steel bar, the contact surface between thesteel bar and the concrete or grouting material and between the sleeve and the concrete or grouting material is increased; meanwhile, the connection strength of the connector formed by the sleeve is enhanced by changing the stress surface generated between the sleeve, the concrete or grouting liquid and the steel bar; and the prefabricated part assembled through the sleeve is simple to assemble during construction, the assembly between the prefabricated plates can be completed quickly, and the construction period is shortened greatly.

Description

technical field [0001] The invention relates to the field of prefabricated buildings, in particular to a sleeve, and a prefabricated component connector, a prefabricated component and a prefabricated component assembly formed based on the sleeve. Background technique [0002] At present, the connection methods of prefabricated components in prefabricated concrete structure buildings, especially the vertical reinforcement connection methods of vertical components (prefabricated wall panels / columns) mainly include: 1) welding connection of embedded parts, 2) bolt connection of embedded parts , 3) There are three connection methods for steel sleeve grouting connection. [0003] The welding connection of embedded parts is that the connecting steel plates are preset at the connecting parts of the components. After the prefabricated components are installed, the adjacent embedded steel plates between the components are welded and connected into one. [0004] Advantages: Simple in...

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Problems solved by technology

[0004] Advantages: Simple installation and operation; Disadvantages: Due to the welding process, the performance of the connected steel plate is brittle, resulting in poor toughness / easy cracking / low connection strength of the steel plate, poor structural connection integrity / air tightness / seismic resistance, poor corrosion resistance / durability; now Belongs to obsolete technology, the market application range is small

The advantage is that the connection strength is higher than the welding strength, and the disadvantages are: high cost, poor structural connection integrity / air tightness / seismic resistance, poor corrosion resistance / durability; small market application range

[0008] Disadvantages: In practical application, the following problems need to be improved in the steel sleeve grouting connection technology: 1. The construction operation is difficult due to factors such as steel bar deformation, displacement, and small installation gap; 2. The problem of grout leakage is easy to occur and cannot be inspected; 3. .The operation process is complex, requiring special equipment, tools, materials, and personnel; 4. High cost and difficult to control the quality; 4. There are many factors affecting the quality of grouting materials (materials, water-cement ratio, mixing, grouting, grout leakage, personnel operation , application time, etc.), quality control is difficult; 5. Since the steel sleeve grouting connection technology is to bond the steel bar to the sleeve through the grouting material, the steel bar connection is realized by using the friction principle and function

Therefore, as the connection medium, the grouting material plays a decisive role in the quality of the connection. The grout must be full, without leakage, and without shrinkage. However, in the actual application process, especially the connection of vertical components (which is prone to leakage and cannot be inspected) is very difficult. Guarantee the quality of the connection, poor quality controllability; the quality of the connection directly affects the connection strength of the steel bar, forming an invalid connection (reinforcement core pulling phenomenon), causing hidden dangers to building safety

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