Partially prestressed and partially non-prestressed concrete hollow pile

Abstract

The invention relates to a partially prestressed and partially non-prestressed concrete hollow pile. The cross section periphery of the partially prestressed and partially non-prestressed concrete hollow pile is a rounded square or a rounded rectangle and the inner circumference is a circle; the length of the outer side and the inner circle diameter are combined according to certain values; the sectional geometric dimensioning in the whole vertical axis direction is identical. Longitudinal main ribs comprise prestress ribs and non-prestress ribs; the number of the prestress ribs and the non-prestress ribs is set according to a certain ratio and the arrangement is designed according to a certain rule; stirrups are fixed outside the main ribs in a roll welding mode or a binding connection mode; the thickness of outer protective layers of the prestress ribs is not less than 40 mm; the thickness of inner protective layers is not less than 35 mm; areas with the length of 1000 to 2000 mm at the pile ends are stirrup dense areas and the interval is from 40 to 70 mm; the stirrup interval is from 60 to 100 mm except the two end dense areas. The partially prestressed and partially non-prestressed concrete hollow pile has the advantages of effectively improving the fragility, increasing ductility, improving earthquake proof, transformation and mechanical performances and being widely applied and popularized to areas having a high requirement for earthquake fortification intensity.

Description

technical field [0001] The invention belongs to the construction field and relates to the improvement of the shape and structure of foundation piles in the construction field, in particular to a partially prestressed and partially non-prestressed concrete hollow square pile. Background technique [0002] There are many building materials for foundation pile engineering in the market, such as pipe piles, various square piles, cast-in-situ piles, bored piles, etc. These piles are mainly divided into two categories: non-prestressed components and prestressed components. Non-prestressed components mainly include traditional square piles, immersed pipe piles, etc. The performance is that the single pile bearing capacity is relatively low, the bending (tension) and shearing resistance are poor, the construction period is long, and the pile quality does not meet the design requirements. Prestressed component piles include pipe piles, centrifugal prestressed square piles, etc. Th...

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Problems solved by technology

[0005] Recently, special-shaped triangular piles have also appeared, but the reinforcement ratio is low, and the integrity of the pile body, shear, bending, and tensile properties are difficult to meet the higher engineering requirements

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