Composite crack control prestressed concrete big tube pile and manufacturing method thereof

Abstract

The invention provides a composite crack control prestressed concrete big tube pile which comprises a steel pipe pile tip and a plurality of tube sections. A substrate of each tube section is made of concrete. The periphery of each tube section is provided with a UHTCC (Ultra High Toughness Cementitious Composites) crack control protective layer for replacing concrete; the outer circumference of the top of the tube section at the pile top is provided with a steel plate hoop; the bottom end of the tube section at the pile bottom is provided with a flange plate; a screw hooping is matched and a longitudinal reserved pore passage is arranged inside the tube pipe of each tube section; the tube sections are spliced into one whole body by tensioning longitudinal prestressed tendons passing through the reserved pore passages; the reserved pore passages are tightly filled through injection molding cement paste after the tensioning of the longitudinal prestressed tendons is completed; and the steel pipe pile tip is connected with the flange plate of the tube section at the pile bottom by a welding mode. Not only are the crack resistance, the crack control capability and the anti-erosion capacity of a pile body improved and the integrity of the pile body in the pile sinking process is ensured, but also the maintenance cost during the daily operation is obviously reduced, the service life of the tube pile is prolonged, and the composite crack control prestressed concrete big tube pile has obvious economic benefits.

Description

technical field [0001] The invention belongs to the technical field of pile foundations of civil engineering, bridge engineering and port engineering, and relates to a prestressed concrete pipe pile and a manufacturing method thereof. Background technique [0002] In recent years, with the vigorous development of wharfs and cross-sea and river-crossing bridges, pipe piles have been widely used due to their good performance and good adaptability. Prestressed concrete pipe piles are widely used in the foundation treatment of reconstruction structures due to their high strength, good durability, strong corrosion resistance, and high impermeability. However, concrete has poor impact resistance. If the number of impacts is large, the pile body will crack and the pile top will be damaged easily. Therefore, it is necessary to improve its crack resistance and toughness to ensure the integrity of the pile body during the pile sinking process. [0003] In order to ensure sufficient ...

AI Technical Summary

Problems solved by technology

However, in some special cases, the tensile stress of the tensile edge exceeds the tensile stress of the concrete, and the concrete will crack and even have a large width, which will bring durability problems to the pile.

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