Still-free PHC tubular pile and production process thereof

Abstract

The invention provides a still-free petroleum hydrocarbon (PHC) tubular pile. Compared with the prior art, the tubular pile consists of the following components by weight: 340 to 420kg of cement, 100 to 160kg of mineral powder, 700 to 900kg of yellow sand, 1,030 to 1,260kg of broken stone, 2.0 to 6.0kg of water reducing agent and 60 to 130kg of water, wherein the particle size of the broken stone is 5 to 25mm. The invention also provides a production process condition and a production process parameter of the tubular pile, so that the tubular pile can still meet the requirement of a national regulation without high-pressure steam curing; the strength of concrete can reach 80MPa within 3 to 5 days, and the strength of the concrete is higher than the design strength of the concrete within 28 days; Rn is more than or equal to 1.15R which meets evaluation requirements according to a mathematical statistical method; and the problems that a pile body is cracked, a pile top is broken, and the like when the knocking frequency of a pile sinking hammer is more than 2,000 are solved.

Description

[0001] technical field [0002] The invention relates to a concrete product and its production process, in particular to a high-strength concrete pipe pile and its production process. Background technique [0003] PHC pipe piles are widely used because of their good mechanical properties, short pile-forming period and low price. They have completely replaced square piles in land engineering. They are more and more widely used in water engineering and are gradually replacing square piles. pile. With the rapid development of water transportation engineering construction, the demand for PHC piles is increasing year by year, and at the same time, owners and design units have put forward higher requirements for the performance and quality of pipe piles. At present, there are two situations in the application of PHC pipe piles in China: 1) Users generally believe that PHC pipe piles must undergo high-pressure steam curing to ensure the quality; 2) The strength of concrete on th...

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Problems solved by technology

[0004] Aiming at the problems that high-pressure steam-cured PHC pipe piles are prone to cracks due to temperature differences, high concrete brittleness and large production investment, the invention provides a pressure-free steamed PHC pipe pile, which is made of cement, mineral powder, yellow sand, gravel, water-reducing The composition of agent and water is different from the prior art in that the ratio of the ingredients is 340~420kg of cement, 100~160kg of mineral powder, 700~900kg of yellow sand, 1030~1260kg of crushed stone, 2.0kg~6.0kg of water reducing agent, 60~130kg of water, the particle size of the gravel is 5~25mm

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