Preparation method of tubular pile

Abstract

The invention provides a preparation method of a tubular pile. The method includes the following steps of mixing and stirring concrete materials to form pile body concrete, arranging the stirred pile body concrete in a mold for prestress tension, conducting centrifugation on the pile body concrete on which prestress tension is conducted till the tubular pile is formed, conducting atmospheric steam curing on the prestress concrete tubular pile formed through centrifugation, detaching the mold, and conducting natural curing to obtain the tubular pile. The concrete raw materials are prepared from additives, wherein super high-early strength polycarboxylate superplasticizer which accelerates the cement hydration reaction serves as the additives, and the low-temperature steam curing and atmospheric curing single-free process, namely, high-pressure curing removal after the conventional process demolding, is achieved. The amount of steam used for the method is small, the steam curing temperature is low, energy is saved, and the environment is protected; the PHC tubular pile produced through the method is stable in strength, and the mean square error is smaller than that of a PHC tubular pile produced through an ordinary process.

Description

technical field [0001] The invention relates to a method for preparing a pipe pile. Background technique [0002] At present, domestic manufacturers of pipe piles generally use two steam curings, normal pressure steam curing and high pressure steam curing, so that C80 pipe piles can reach the factory strength in a relatively short period of time (24 hours). Both the steaming pond and the autoclave consume a lot of steam. However, with the mandatory implementation of the new national environmental protection law, coal-fired boilers below 10 tons (inclusive) are facing environmental protection upgrades. If they want to meet environmental protection standards, they must choose natural gas. This will give everyone Pipe pile manufacturers have brought huge cost increases. According to statistics, the cost of fuel oil is 3.5-4.0 times that of coal, and the cost of gas is 4.5-5.5 times that of coal. Taking the conventional product D500-125 piles as an example, the cost per meter T...

AI Technical Summary

Problems solved by technology

Both the steaming pond and the autoclave consume a lot of steam. However, with the mandatory implementation of the new national environmental protection law, coal-fired boilers below 10 tons (inclusive) are facing environmental protection upgrades. If they want to meet environmental protection standards, they must choose natural gas. This will give everyone Pipe pile manufacturers have brought huge cost increases. According to statistics, the cost of fuel oil is 3.5-4.0 times that of coal, and the cost of gas is 4.5-5.5 times that of coal. Taking the conventional product D500-125 piles as an example, the cost per meter The cost of pipe piles will increase by about 15-20 yuan, so the "boiler crisis" in the pipe pile industry will become a problem that all pipe pile manufacturers must face. subject

Atmospheric pressure steam curing is carried out at a temperature lower than 100 degrees, including static stop, heating, constant temperature, and cooling process; while autoclaved curing needs to be under the conditions of pressure 0.95-1.00MPa and temperature 170-180, Curing for 10-20 hours. Autoclave curing is the most energy-consuming and time-consuming process in the entire pipe pile production process. Not only does it need to add autoclave equipment, but it also requires high energy consumption, high maintenance costs, and dangers such as boiler explosions.

Images