Method for machining shock-resistant self-locking type half grouting sleeve and method for machining concrete member

Abstract

The invention provides a method for machining a shock-resistant assembly self-locking type half grouting sleeve and a method for machining a concrete member. The method for machining the shock-resistant assembly self-locking type half grouting sleeve comprises the steps that (1) the grouting sleeve is machined in a casting mode and integrally formed, one end of the grouting sleeve is subjected toinner thread treatment, and a plurality of mounting holes are formed in a sleeve body for standby application; (2) one end of a steel pipe transition section is subjected to outer thread treatment forstandby application; (3) firstly, a plurality of longitudinal guiding steel bars and a plurality of circumferential fixing steel rings are welded to form cylindrical keels, then a plurality of inclined steel branches are welded on a plurality of annular sections of the keels in emissive and inclined modes to form inner barbs and outer barbs for standby application; and (4) assembly is conducted.All parts of the grouting sleeve are machined and manufactured correspondingly and then assembled, mass production is achieved, and the quality of all the parts is easy to control; connection of the grouting sleeve and the steel pipe transition section is operated by machines in a factory, the threaded connection quality is easy to control, a first to-be-connected steel bar and the steel pipe transition section directly adopt the rolling mode, thus the connecting working procedure is simple, and the lengths of the steel bar parts inserted into the sleeve are easy to control; and a self-lockingtype steel skeleton is adopted, so that pulling preventing is achieved.

Description

technical field [0001] The invention belongs to the field of prefabricated building construction, in particular to a processing method for an anti-seismic self-locking semi-grouting sleeve and a processing method for concrete components. 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 ...

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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