Prestressed concrete hollow square pile and production method thereof

Abstract

The invention discloses a prestressed concrete hollow square pile comprising a plurality of independent main steel reinforcements. Both ends of each main steel reinforcement are respectively fixedly connected with square end plates; the main steel reinforcements are externally sleeved with steel reinforcement cage racks; each steel reinforcement cage rack comprises a spiral steel reinforcement, and the spiral steel reinforcement is welded with a plurality of auxiliary steel reinforcements; concrete is poured outside the main steel reinforcements and the steel reinforcement cage racks and is combined with the main steel reinforcements and the steel reinforcement cage racks into an integral square pile; and the center of the integral square pile is provided with a central circular hole penetrating through an integral square pile body. The invention aims at providing the prestressed concrete hollow square pile which has the advantages of good molding quality, high single-pile bearing capacity, undamaged steel reinforcement framework before the steel reinforcement framework is used, convenient production, good horizontal anti-bending bearing capacity, high shearing resistant property, convenient stacking and difficult knock damage during pile hoisting, transportation and transferring. The invention also aims at providing a production method of the prestressed concrete hollow square pile.

Description

technical field [0001] The invention relates to a prestressed concrete hollow square pile, and also relates to a production method of the prestressed concrete hollow square pile. Background technique [0002] At present, there are two main types of precast concrete hollow square piles used in construction projects: concrete solid square piles and concrete hollow square piles. Its main performance is reflected as follows: [0003] The precast concrete solid square pile has a large friction area, but it has a large self-weight, and it is prone to cracks and breaks during hoisting, transportation, and construction transfer, and consumes too much concrete, steel and other materials during production. Its production process is to directly fill the concrete into the prefabricated steel bars, and form it through natural curing or vibration forming. There are many internal pores, and its compressive strength is below C40. The square pile body concrete produced by this process has ...

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Problems solved by technology

Although the centrifugally formed prestressed concrete hollow square pile has higher friction and bearing capacity with the ground than the pipe pile, there are still some problems that need to be solved, such as: the joints of the pile body are just on the opposite corners of the four sides, It is easy to cause problems such as slurry leakage; the main reinforcement of the reinforcement cage and the stirrup are not firmly welded; the main reinforcement is easily burned during welding; the stress loss of the reinforcement skeleton is large, the length of the same bundle of reinforcement is different, and the end surface of the entire reinforcement cage is uneven. The reinforcement cage is bulky for installation, etc.

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