Steel structure of prestressed high-strength concrete pipe pile body

Abstract

The invention discloses a steel structure of a prestressed high-strength concrete pipe pile body. The steel structure comprises a first pile head plate, wherein the side surface of the first pile headplate is fixedly connected with a tensioning positioning plate; a positioning groove is formed in the side surface of the first pile head plate; the inner wall of the positioning groove is in lap joint with a prestressed tendon pier head; the other end of the prestressed tendon pier head is fixedly connected with a prestressed steel bar; a spiral stirrup is arranged on the surface of the prestressed steel bar; the surface of the prestressed steel bar is sleeved with a steel sleeve hoop; and the right end of the prestressed steel bar is fixedly connected with a threaded sleeve. According to the steel structure of the prestressed high-strength concrete pipe pile body, a tensioning plate and a tensioning screw are arranged, the tensioning screw penetrates through the tensioning plate and isin threaded connection with the threaded sleeve, the gap between the threaded sleeve and the tensioning plate is adjusted through the tensioning screw, the tensioning plate and the tensioning positioning plate are parallel to each other, the situation that the structural strength of a pipe pile is affected due to the fact that the prestressed steel bar is stressed unevenly during tensioning is prevented, and therefore the effect of improving the quality of the pipe pile is achieved.

Description

technical field [0001] The invention relates to the technical field of concrete pipe piles, in particular to a steel structure of a prestressed high-strength concrete pipe pile body. Background technique [0002] Prestressed concrete pipe piles can be divided into post-tensioned prestressed pipe piles and pretensioned prestressed pipe piles. Pretensioned prestressed pipe piles are hollow cylinders made by pretensioning prestressing technology and centrifugal forming method The slender concrete prefabricated components are mainly composed of cylindrical pile body, end plate and steel ferrule. The prestressed concrete pipe pile is driven into the ground, and the weight of the upper building is transmitted through the pile foundation to the lower soil layer with high bearing capacity. If the lower soil layer with high bearing capacity is very deep, the pile foundation and surrounding soil can also be used friction to support the weight of the superstructure. [0003] Usually,...

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Problems solved by technology

[0003] Usually, the steel structure of the prestressed concrete pipe pile is connected to the end plate by welding, and it is difficult to ensure that the length of each steel bar is consistent during the welding process. When prestressing the end plates at both ends of the pipe pile, Due to the different lengths of the steel bars in the pipe piles, the stress on each steel bar is different. After the concrete is finished, the prestressed oil cylinder is removed, and the internal stress of the pipe piles is not equal, which affects the structural strength of the prestressed concrete pipe piles.

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