Pretensioned prestressed concrete polygonal pile and production method thereof

Abstract

The invention discloses a pretensioned prestressed concrete polygonal pile, which is characterized by comprising a reinforcing cage, wherein a polygonal pile body which is poured by concrete and combined with the reinforcing cage into a whole is arranged outside the reinforcing cage; the polygonal pile body is provided with at least five edges; the center of the polygonal pile body is provided with a central round hole which passes through the whole polygonal pile body; the two ends of the polygonal pile are respectively provided with polygonal end plates; and the two ends of the reinforcing cage are fixedly connected with the polygonal end plates. The invention aims to overcome the defects in the prior art, and provides the pretensioned prestressed concrete polygonal pile which has the advantages of high single pile bearing capacity, high horizontal bend-resistant bearing capacity, high shear resistance, high shock resistance, small loss under construction, material saving, light dead weight, convenient stacking, and difficult damage during lifting, transporting and transferring. The invention also aims to provide a method for producing the pretensioned prestressed concrete polygonal pile.

Description

technical field [0001] The invention relates to a pretensioned prestressed concrete polygonal pile, and also relates to a production method of the pretensioned prestressed concrete polygonal pile. Background technique [0002] At present, there are many precast concrete pile foundations used in construction projects, mainly concrete solid square piles, concrete hollow square piles, prestressed concrete pipe piles, precast concrete pouring piles, etc. Its main performance is as follows: [0003] Prefabricated concrete solid square piles have a large friction area and good bearing capacity, but they have a large self-weight, and are prone to cracks and breaks during hoisting, transportation, and construction transfer, and consume too much concrete, steel and other materials during production. [0004] Cast-in-situ piles are greatly affected by the weather, and cannot be constructed in rainy days, and the construction period cannot be guaranteed. Because the two types of piles...

AI Technical Summary

Problems solved by technology

After centrifugal forming, the quality of the pile body is reliable, and it has the advantages of high concrete strength of the pile body. However, the outer surface of the pipe pile is smooth and the size is small. When used as a friction pile with the same diameter, the friction force with the soil is small, and the single pile foundation provided The bearing capacity is low, and because the bending resistance of thin-walled pipe piles is not high, in many projects, the outer diameter of pipe piles is taken as a measure, thereby increasing the project cost

[0006] Although the frictional force and bearing capacity of centrifugally formed prestressed concrete square piles with the ground are higher than those of pipe piles, there are still some problems to be solved, such as low reinforcement ratio, more concrete materials distributed on four sides and less in the middle, and The distribution of steel bars is uneven, and due to the different gravity during centrifugal forming, it is difficult to centrifugally compact the concrete at the four corners, and its mechanical properties are poor in tensile, compressive and bending resistance.

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