Tensioning and connection integrated prefabricated pile

Abstract

The invention discloses a tensioning and connection integrated prefabricated pile. The tensioning and connection integrated prefabricated pile comprises a prefabricated pile body, wherein a first connection flange disc is arranged at one end of the prefabricated pile body, and the section of the end is of a structure shaped like a Chinese character 'Tu'; a second connection flange disc is arranged at the other end of the prefabricated pile body, and the section of the end is of a structure shaped like a Chinese character 'Ao'; an annular retainer ring is formed by extending the second connection flange disc along the axial direction; the first connection flange disc is adaptive to the second connection flange disc; in a pile connection process, upper and lower sections of the piles are mechanically connected through the first connection flange disc and the second connection flange disc, which are adaptive, so that pile connection is finished. The tensioning and connection integrated prefabricated pile has the advantages of simple structure, high construction efficiency and low cost; a mechanical connection structure is adopted so that the connection is convenient and the bearing capability of a foundation pile is strong.

Description

technical field [0001] The invention relates to the technical field of foundation treatment, in particular to a prefabricated pile with a tension connection. Background technique [0002] Pre-tensioned prestressed concrete precast piles have been widely used in pile foundations. In the construction process, measures such as welding, mechanical connection or anchoring slurry are generally used to splicing the precast piles section by section to form a whole foundation pile. [0003] At present, the most important form of prefabricated pile connection is welding connection. The lower section pile is driven to a position about 1m above the ground, the upper section pile is hoisted to the lower section pile, and the welding is started after adjustment. The welding time of each joint is About 40 minutes, the entire pile body stays in the stratum for too long, which is easy to cause difficulties in pile driving, and even fails to achieve the expected design goals; Due to the infl...

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Problems solved by technology

[0003] At present, the most important form of prefabricated pile connection is welding connection. The lower section pile is sunk to a position about 1m above the ground, the upper section pile is hoisted to the lower section pile, and welding is started after adjustment. The welding time of each joint About 40 minutes, the entire pile body stays in the ground for too long, it is easy to cause difficulty in pile sinking, or even fail to achieve the expected design goal; Under the influence of rain and wind, the quality of welds is not easy to guarantee, and hidden dangers will be buried in the pile, which will also directly affect the quality of the pile foundation; when the wind and rain are heavy, construction cannot be carried out, which will affect the construction progress and efficiency

[0004] In addition, most of the mechanical connections of prefabricated piles used in China are mostly connected by the main reinforcement joints of steel bars. Although the pull-out performance of the components after connection meets the design requirements, the bending resistance is greatly reduced. When the bending moment of the pile body is large, due to the joint part It is not the overall force, and the force at the joint is only the force of the steel bar at the bottom of the pile body. The joint performance cannot meet the basic principles of design of reinforced concrete structures with the same pile body force, which limits the application of mechanical joints

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