Precast reinforced concrete tubular pile

Abstract

The invention is a preprocessed steel bar concrete pipe structure. The structure includes concrete, primary steel bar of steel bar cage, ring or spiral type steel bard cage hooping, the pile head metal connection component at two ends of the pile and other constructing components, the steel cage primary bar is the one with non pretensioned prestressing. The method is: the steel bar cage made up of non pretensioned prestressing steel bar and hooping is produced according to the design; the steel bar cage is connected with the pile head metal components, arranges with each kind of embedded component; the steel bar cage is put into the steel model, pours the concrete in the model, completes the pile perform; the steel model assembled with a pile perform rotates around the spindle, the concrete is centrifugated and compacted and formed; maintenance and demolding. The structure and producing method does not uses pretensioned prestressing and restrain the process with special prestressing steel bar, but with normal steel bar or other additive material, the demands is low, the material is enough.

Description

[0001] technology field or [0002] The invention relates to a prefabricated reinforced concrete pipe pile as a deep foundation of a building, in particular to a non-prestressed, high-strength concrete pile section structure used in a non-hammer pile planting method, such as a drilled rock-socketed pile and a static pressure pile A high-bearing-capacity pile segment structure based on construction methods and its fabrication and installation methods. Background technique [0003] At present, most of the hammered precast concrete piles used in pile foundations are prestressed concrete pipe piles, referred to as PHC (precast concrete square piles, which are gradually withdrawn from pile foundation projects due to their backward production technology and low bearing capacity), and their main structures: Pre-tensioned prestressed main steel bars, spiral steel bars, end steel plates at both ends and steel skirt plates, etc., and the filling material for the pipe pile wall is concre...

AI Technical Summary

Problems solved by technology

[0010] 1. Concrete pipe piles designed and manufactured mainly for the hammering piling construction method can effectively resist the tensile stress generated by hammering with the pre-tensioned prestressed structure, but the prestressed production technology is difficult and requires investment in production equipment and measuring instruments Huge, beyond the reach of ordinary enterprises

[0011] 2. Prestressed steel bars are not ordinary building steel bars, but high tensile stress steel bars with yield strength three times higher than ordinary building steel bars. The price is very high and the supply is scarce.

[0012] 3. The prestress in the concrete and the high tensile stress steel bars are only applied for the short-term load generated by hammering, transportation and hoisting. It not only cannot provide the bearing capacity for the building, but also consumes part of the bearing capacity of the concrete. The potential of building materials is not being used to its full potential

[0013] 4. Although the prefabricated prestressed concrete pipe pile has high bending stiffness, its steel bar content is low, and the prestress in the concrete is also lost due to hammering, transportation, hoisting conditions, and pile head cutting. Resistance to large tensile and bending stresses, resulting in extremely low matching of compressive strength, bending strength and bending stiffness

However, the vertical loads on the pile foundations of high-rise buildings are often accompanied by high horizontal forces. This fact has led to the fact that the steel pile foundations in some areas cannot be completely replaced by prefabricated pretensioned prestressed concrete pipe piles.

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