Anti-vibration assembly self-locking type semi-grouting sleeve

Abstract

The invention provides an anti-vibration assembly self-locking type semi-grouting sleeve. The sleeve comprises a non-grouting connecting section and a grouting connecting section, wherein one tube body section of a steel tube transition section is fixedly arranged in the non-grouting connecting section; another tube body section extends to the outside of the non-grouting connecting section to forma rolling-pressing section which is in rolling-pressing connection with a first to-be-connected reinforcing steel bar; a steel framework comprises inner barbs and outer barbs; the inner barbs are enclosed to form a channel for allowing a second to-be-connected reinforcing steel bar to pass through, and the diameter of the channel is smaller than that of the second to-be-connected reinforcing steel bar; and the outline diameter enclosed by the outer bards is greater than the inner cavity diameter of the grouting connecting section. Each part of the grouting sleeve is separately processed and manufactured, re-assembled, and produced in batch, and easily controlled in quality; connection between the grouting sleeve and the steel tube transition section is operated in a plant through machinery, and threaded connecting quality is easily controlled; the first to-be-connected reinforcing steel bar and the steel tube transition section are directly connected in a rolling-pressing mode, so that processes are simple, and length, inserted into the sleeve, of reinforcing steel bars is easily controlled; and a self-locking type steel framework is adopted, so that the anti-pulling purpose is realized, and antiknock characteristic is improved.

Description

technical field [0001] The invention belongs to the field of prefabricated building construction, in particular to an anti-seismic assembled self-locking semi-grouting sleeve connection structure. Background technique [0002] From the perspective of the global environment, it is imperative for the construction industry to develop into prefabricated construction. The continuous progress of prefabricated concrete building construction technology provides a technical basis for improving the performance of prefabricated prefabricated structures and realizing the housing industry. The prefabricated concrete structure refers to the concrete structure assembled by prefabricated concrete components through a reliable connection method, and then the prefabricated concrete structure is integrated with the post-cast concrete and cement-based grouting materials on site to form an integrated concrete structure. Its core And the difficulty is the quality of the steel bar connection, that...

AI Technical Summary

Problems solved by technology

The prefabricated concrete structure refers to the concrete structure assembled by prefabricated concrete components through a reliable connection method, and then the prefabricated concrete structure is integrated with the post-cast concrete and cement-based grouting materials on site to form an integrated concrete structure. Its core And the difficulty is the quality of the steel bar connection, that is, the existing technology and process are difficult to guarantee the coaxial butt joint of the steel bars to be connected. At present, non-shrinkage or micro-expansion cement-based grouting materials are usually poured into the semi-grouting or full-grouting sleeves to realize prefabricated components. The connection between them, but the existing construction technology is difficult to ensure that the sleeve is filled with grouting material, and it is difficult to ensure that the grouting is dense, and there is no effective technical means to detect the grouting density in the specific engineering construction. Therefore, the prefabricated building The development and use in areas with high seismic fortification requirements are limited. Therefore, in order to realize the universal applicability of prefabricated construction technology, it is necessary to address the above problems and improve the connection structure and construction technology in a targeted manner.

[0003] Due to the large geometric size of the full-grouting sleeve, the grouting workload is large, the construction is difficult, and the reinforcement area around the connection node is large. At present, half-grouting sleeves are commonly used in engineering, and the widely used half-grouting sleeves are cast iron. One end of the sleeve is directly connected to the steel bar bolt, and the other end is directly connected by grouting. 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 threaded with the half-grouting sleeve. The disadvantages of the connection method are: 1) the on-site thread processing process is complicated, and the quality standard is difficult to control; 2) when the thread connection is carried out on the construction site, a torque wrench must be used, which is difficult to operate; 3) the steel bar inserted into the grouting sleeve The length and threaded connection quality control must meet the requirements of national standards and regulations, and it is extremely difficult to achieve a high pass rate; 4) In the currently disclosed technology, the semi-grouted connection structure mainly adds ribs from the non-grouted connection section and the side wall of the grouted sleeve. To improve the strength of the connection part of the fabricated concrete member, so that the wall of the sleeve is thicker and the self-heavy

[0004] In addition, there are also semi-grouting sleeves that are processed by mechanical cutting of steel bars or manufactured by rolling the finished seamless steel pipe. The shortcomings of construction, such as a new type of cement grouting ribbed steel bar connection joint disclosed in Chinese patent document CN102116075A, is essentially a semi-grouting sleeve that is processed by milling rolled section steel.

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