Manufacturing process of pre-tensioned prestressed centrifugal concrete square pile

Abstract

The invention discloses a manufacturing process of a pre-tensioned prestressed centrifugal concrete square pile. The manufacturing process includes the steps of a, measuring and stirring concrete materials; b, manufacturing end plates of the centrifugal square pile; c, manufacturing a frame; d, mounting the reinforced frame; e, distributing concrete; f, closing a mold; g, performing prestress tensioning; h, performing centrifuging; I, performing primary steam curing; j, performing stripping; and k, directly lifting stripped centrifugal square piles, having concrete design strength level reaching C60, to a product yard for stacking, and delivering out of the factory after natural curing is complete and delivery strength is reached; subjecting the stripped centrifugal square piles, having the concrete design strength level reaching C80 and above, to high-temperature steam curing in a high-pressure autoclave, and directly delivering the piles subjected to the high-pressure curing. The manufacturing process has the advantages that the manufacturing process is simple, manufacturing time is short, fewer materials are used, energy consumption is low, and the manufactured centrifugal pile has high strength and good quality.

Description

technical field [0001] The invention relates to a manufacturing process of a pretensioned prestressed centrifugal concrete square pile. Background technique [0002] Precast concrete piles in building foundation engineering mainly include precast concrete pipe piles with circular cross sections and precast concrete square piles with square or rectangular cross sections. Since the 1990s, with the standardization of precast concrete pipe piles and the continuous development of production and construction technology, pipe pile products have been widely recognized in foundation engineering, and pipe pile products have their significant advantages in actual engineering, but Insufficient performance in the following aspects: 1) The pipe pile has an outer circular structure, which is not easy to help tie and fix during transportation; 2) Due to the certain ellipticity of the pipe pile body, it is easy to break the pile body when adopting hugging construction Accidents; 3) After th...

AI Technical Summary

Problems solved by technology

Since the 1990s, with the standardization of precast concrete pipe piles and the continuous development of production and construction technology, pipe pile products have been widely recognized in foundation engineering, and pipe pile products have their significant advantages in actual engineering, but Insufficient performance in the following aspects: 1) The pipe pile has an outer circular structure, which is not easy to help and fix during transportation; 2) Due to the certain ellipticity of the pipe pile body, it is easy to break the pile body when adopting hugging construction Accident; 3) After the pipe pile is constructed on soft soil foundation, the pile position is prone to inclination when the foundation pit is excavated; 4) The cap of the pipe pile foundation is larger than that of the square pile, and the foundation cost is higher

The prefabricated square pile mainly has the following defects: 1) Low production efficiency and long production cycle; 2) The product quality is unstable, and there are many air holes in the hardened concrete structure section; 3) The concrete strength is low, and the bearing capacity of the pile body cannot be fully utilized ; 4) The natural curing time of concrete is long, and the production area is large

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