A production process of large-diameter sc-shaped steel-concrete piles

Abstract

The invention relates to a production process of a large-caliber SC shape steel mixed pile or column. The production process comprises the following steps: a matched tool is manufactured, disc round steep is stretched, and an outer reinforcement cage and a reinforcing cage rib are manufactured; the outer reinforcement cage is welded with a pull rod, and the reinforcing cage rib is put in the outer reinforcement cage after coating an upper end plate; a middle joiner is connected with a keel, the assembled outer reinforcement cage coats a steel pipe, a head plate is assembled with a steel cylinder, and a steel pipe core rod is coated with a rubber pipe to be inserted in the structural part; a pile top section structure, a pile bottom section structure and a standard section structure are manufactured in sequence and are assembled, the assembled structural part is lifted into a steel mold, the mold is closed, the centrifugation is performed after the pumping of concrete, and the normal-temperature maintenance is performed; when the strength of the concrete reaches 10% of a design value, the steel pipe is pulled out; and when the strength of the concrete reaches 60% of the design value, the mold is disassembled, and the product is formed through assembling. The production process can manufacture an ultralong prestress concrete pipe pile with large diameter.

Description

technical field [0001] The invention relates to the field of pipe pile manufacturing, in particular to a production process of large-diameter SC-shaped steel-concrete piles or columns. Background technique [0002] Pipe piles are divided into prestressed concrete pipe piles and prestressed high-strength concrete pipe piles according to the concrete strength grade or effective precompression stress. The prestressed concrete pipe pile is code-named PC, the prestressed high-strength concrete pipe pile is code-named PHC, and the thin-walled pipe pile is code-named PTC. The concrete strength of PC piles shall not be lower than C60, the strength grade of thin-walled pipe piles shall not be lower than C60, and the concrete strength grade of PHC piles shall not be lower than C80. [0003] PC piles and PHC piles produced by the pretensioning method have been widely used in domestic construction, bridge and other projects, but due to mechanical equipment, transportation technology an...

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Problems solved by technology

[0003] PC piles and PHC piles produced by the pretensioning method have been widely used in domestic construction, bridge and other projects, but due to mechanical equipment, transportation technology and other reasons, the pretensioning method is limited to the production of outer diameter 300mm-1000mm, single Pipe piles with a length of 7m-15m, and in some large and medium-sized port terminals, bridges and other projects, most of them need to use large-diameter, super-length prestressed concrete pipe piles with a diameter of 1000mm-1400mm and a single length of 40m-60m. Pipe piles that meet the above requirements cannot be produced by the pretensioning process

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