High Performance Low Prestressed Concrete Solid Square Pile

Abstract

The invention relates to a building, in particular to a high-performance low-prestress concrete solid square pile. The high-performance low-prestress concrete solid square pile comprises a pile body and a pile head and is characterized in that the pile body consists of one or a plurality of sections of piles; each unit pile consists of concrete and parallel reinforcements, of which the prestressed tension is 0.3 to 0.4[Sigma], in the concrete; both ends of the reinforcements are respectively connected with connecting disks; the adjacent unit piles are welded into the pile body by the connecting disks; every two connected connecting disks are wound with an anticorrosive resin layer of which the thickness is not less than 1.5mm; the anticorrosive resin layers are wound with carbon fiber layers capable of improving anticorrosion capacity and resistance to tension. A production process of the high-performance low-prestress concrete solid square pile comprises the following steps: making a unit pile die; making the concrete with antirust anti-permeability capacity; making a reinforcement cage; making the pile body. The high-performance low-prestress concrete solid square pile has the advantages of convenience for processing, low production cost, high corrosion resistance, long service life and the like, and is particularly suitable for being used in the seawater environment such as sea, saline alkali soil and the like.

Description

technical field [0001] The invention relates to building construction, in particular to a high-performance low-prestressed concrete solid square pile with convenient construction, long service life and good seismic effect. Background technique [0002] As we all know, piles are the foundation of buildings, and the building of buildings must first have a good pile foundation. For this reason, JGJ94-2008 "Technical Specifications for Construction Pile Foundations" specifically puts forward technical requirements for concrete piles, and prestressing is generally used now. Concrete ordinary piles, such as the patent number 2012100044922, the patent name is "prestressed concrete solid square piles and manufacturing methods", which contain steel cages and concrete, and the steel cages are a combined overall structure, and at least two are welded by sliding welding methods. The single-body steel cage is welded or tied, and the two ends of the pile body are provided with metal end p...

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Problems solved by technology

[0002] As we all know, piles are the foundation of buildings, and the construction of buildings must first have a good pile foundation. For this reason, JGJ94-2008 "Technical Specifications for Building Pile Foundations" specifically puts forward technical requirements for concrete piles, and prestressed piles are generally used now. Concrete ordinary piles, such as the patent number 2012100044922, the patent name is "prestressed concrete solid square pile and its manufacturing method", which contains steel cages and concrete. The single-body reinforcement cage is welded or bound. The two ends of the pile body are provided with metal end plates connected with the reinforcement cage. The stirrups of the reinforcement cage are welded on the main reinforcement in a spiral shape, and the main reinforcement of the reinforcement cage is made of prestressed steel rods. , its prestress is 0.7-0.9[σ], and its strength meets the requirement of greater than 1420 N per square millimeter. Since each steel cage is welded by sliding welding, the structural strength of the steel cage itself is greatly improved, and the strength of the solder joints The loss is less than or equal to 5%, and the diameter of the prestressed main reinforcement of the steel cage is reduced by 20%. The disadvantage of this kind of high prestressed concrete solid square pile is that the design is unreasonable. However, this kind of high prestressed concrete solid square pile uses high prestressed steel rods. Due to the high prestress, the bearing capacity of the pile body is reduced; the second is that there is no protective measure for the connection between the pile bodies. Poor anti-corrosion ability. The third is to use ordinary concrete, which has poor anti-corrosion performance, which affects the durability of prefabricated piles. Because it is ordinary concrete, the atmosphere or corrosive medium is easy to corrode steel bars and concrete, especially in oceans, saline-alkali soils When used in seawater environment, the service life of the building will be shortened

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