Method for producing pretensioned prestressing concrete shape tube pile

Abstract

The invention discloses a pretensioned prestress concrete special tubular pile, comprising a tubular pile (1) made from steel bar concrete with end plates at two ends while the pile extends axially from inner and outer radiuses, horizontal baffles uniformly arranged axially in the inner hole of the tubular pile (1), and an annular horizontal baffle (2) made from steel bar concrete and integrated with the steel bar concrete of tubular pile (1), while the axial distance of the horizontal baffles (2) are different. The production uses general method to produce tubular pile (1), as well as produces annular horizontal baffles (2), that produces a steel bar cage of annular horizontal baffles (2), fixing axial distance of baffle (2) on the steel bar cage and mounting horizontal baffle template, while irrigating tubular pile (1) and annular horizontal baffle (2) at same time. The inventive tubular pile can effectively improve rigidity, flexibility, bending resistance and crack resistance of tubular pile, and confirm the concrete quality of pile structural layer, without improving sink force and protrusion.

Description

technical field [0001] The invention relates to a method for manufacturing concrete components for construction, in particular to a method for manufacturing pretensioned prestressed concrete special-shaped pipe piles. Background technique [0002] The pretensioned prestressed concrete pipe pile in the prior art is a prestressed concrete prefabricated member of a hollow cylinder formed by a pretensioned prestressing process and concrete centrifugal method. It is generally divided into prestressed concrete pipe piles (abbreviated as PC piles), prestressed high-strength concrete pipe piles (abbreviated as PHC piles) and prestressed concrete thin-walled pipe piles (abbreviated as PTC piles). Among the many pile foundations, the pretensioned prestressed concrete pipe pile has the advantages of higher single pile bearing capacity, wider design selection range, stronger adaptability to geological conditions, better pile construction environment, and faster construction speed. . I...

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Problems solved by technology

[0003] However, with the continuous expansion of its popularization and application, the pre-tensioned prestressed concrete pipe piles extending along the axial and equal inner and outer diameters of the prior art gradually show the following disadvantages: their stiffness and ductility, bending resistance, and crack resistance However, it is still insufficient, especially when the pipe pile is applied in the soft ground foundation, such as during the pile sinking construction process, the pipe pile often causes excessive displacement, pile cracking, and even pile breakage due to soil compaction or earth excavation. Engineering accidents often occur, thus affecting its promotion and use

Analyzing objectively, if the shortcoming of the above prior art is overcome with this tubular pile, there are still following deficiencies: 1, the pile sinking force that needs in the pile sinking construction process is hammering force or holding pressure increases, easily occurs due to sinking The pile force is greater than the material strength of the non-protruding pipe pile wall, resulting in the phenomenon of crushing the concrete pipe pile; 2. During the pile sinking construction process, the soil passed by the external protrusions will be repeatedly disturbed by the external protrusions, which is prone to occurrence Various factors that are not conducive to pile sinking, such as increased pore water pressure, affect the progress and quality of pile sinking; 3. In the manufacture of pipe piles, it is inevitable that the structure of the concrete will be delaminated due to the centrifugal process. From the outer wall to the inner wall are concrete layers, mortar layers and cement slurry layers, but with the outer protrusions, it is easy for the concrete layer to concentrate on the outer protrusions and reduce the concrete quality of the pipe pile structure layer (outer wall), thus affecting the pipe pile. The phenomenon of bearing capacity; 4. Although the angle of the outer protrusion is greater than 90°, but due to the small size, it still has a certain impact on the local quality of the concrete when demoulding

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