Novel anti-hydrogen-embrittlement TSC pile and production process thereof

Abstract

The invention relates to a production process of a novel anti-hydrogen-embrittlement TSC pile. The production process is characterized in that insulating sleeves are additionally arranged between endplates and prestressed steel bars in a steel bar cage, and the fact that the two ends of each prestressed steel bar extend out of the end plates is ensured; and then after centrifugation and steam curing are carried out, the parts, extending out of the end plates, of the prestressed steel bars are cut, and then high-pressure steam curing is carried out so as to obtain the novel anti-hydrogen-embrittlement TSC pile. The invention further relates to the novel anti-hydrogen-embrittlement TSC pile manufactured by the production process. The production process of the novel anti-hydrogen-embrittlement TSC pile has the advantages that the steel bars of the steel bar cage are designed to be longer than a whole pile body in advance, so that the problem that the end concrete of a steel pipe is exposed after tensioning is solve; furthermore, the structure of the steel pipe does not need to be changed in the whole production process, and only the length of the prestressed steel bars needs to be increased; the structure is simple, moreover, only the parts which extend out of the end plates need to be directly cut after tensioning, and manufacturing is very convenient; and the insulating sleevesare additionally arranged between the end plates and the prestressed steel bars, so that generation of a hydrogen embrittlement phenomenon is effectively avoided.

Description

technical field [0001] The invention relates to the field of pipe pile production, in particular to a novel anti-hydrogen embrittlement TSC pile, and also relates to a production process of the novel anti-hydrogen embrittlement TSC pile. Background technique [0002] In the existing steel pipe pile industry, the structure of the prestressed steel pipe concrete pile includes the pile body and the end plates at both ends of the pile body. The manufacturing process of concrete piles is generally as follows: processing and forming of steel pipes, processing and forming of steel cages; putting steel cages into steel pipes; installing left and right end plates; first welding and connecting one end plate with steel pipes; The completed steel pipe is placed in the steel mold; stretched in place according to requirements; pumped and fed; centrifuged and steamed; the disadvantage of the steel pipe pile produced by this manufacturing process is: after tensioning, the concrete slurry at...

AI Technical Summary

Problems solved by technology

[0002] In the existing steel pipe pile industry, the structure of the prestressed steel pipe concrete pile includes the pile body and the end plates at both ends of the pile body. The manufacturing process of concrete piles is generally as follows: processing and forming of steel pipes, processing and forming of steel cages; putting steel cages into steel pipes; installing left and right end plates; first welding and connecting one end plate with steel pipes; The completed steel pipe is placed in the steel mold; stretched in place according to requirements; pumped and fed; centrifuged and steamed; the disadvantage of the steel pipe pile produced by this manufacturing process is: after tensioning, the concrete slurry at the end of the steel pipe is exposed The phenomenon that the concrete at the connection with the end of the steel pipe is prone to cracks, which affects the quality of the product

[0004] However, in the above-mentioned structure, although the problem of concrete exposure at the end of the steel pipe pile after prestressed tensioning can be well solved, for its steel pipe structure, it is necessary to add a telescopic section on the basis of the original structure , the overall structure is more complicated, and the processing and manufacturing are more troublesome; in addition, the end plate of this steel concrete pipe pile is directly connected with the steel rods in the steel cage. The stress steel bar forms a path with the external steel pipe wall and other power sources. Under the interference of stray current, it will inevitably cause the concentration of hydrogen molecules existing inside the steel bar (stress concentration)

After the stress concentration, the steel bar is prone to cracks locally, resulting in local hydrogen embrittlement (fracture), which directly affects the compressive and bending resistance of the product and reduces the service life of the product

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