8-shaped CT lock catch steel pipe pile and Larsen steel sheet pile combined cofferdam structure

Abstract

The invention discloses an 8-shaped CT lock catch steel pipe pile and Larsen steel sheet pile combined cofferdam structure. I-shaped steel is welded to the outer side of a first steel pipe; a rotating block is arranged in the first steel pipe; one end of a rotating shaft is welded to the top end of the rotating block; a cover plate is welded to the other end of the rotating shaft; a connecting rod is welded to the inner wall of a second steel pipe; the free end of the connecting rod is welded to the cover plate; a connecting seam is formed in the second steel pipe; three or more CT lock catch steel pipe piles are sequentially connected to form a CT lock catch steel pipe pile cofferdam; the I-shaped steel on the CT lock catch steel pipe piles is clamped with the connecting seam in the adjacent CT lock catch steel pipe pile; three or more Larsen steel sheet piles are sequentially connected to form a Larsen steel sheet pile cofferdam; the adjacent Larsen steel sheet piles are buckled through first Larsen lock catches; connecting openings are formed in the end corners of the Larsen steel sheet pile cofferdam; and the Larsen steel sheet pile cofferdam is connected to the end corners of the CT lock catch steel pipe pile cofferdam through the connecting openings. The steel pipe piles and the steel sheet piles are organically combined through the connecting openings, the strength of the cofferdam is improved, and the construction cost is saved.

Description

technical field [0001] The invention relates to the technical field of building construction, and more specifically, relates to a cofferdam structure combined with an 8-shaped CT locking steel pipe pile and a Larsen steel sheet pile. Background technique [0002] In recent years, with the rapid development of my country's basic transportation construction, cofferdam construction technology has been widely used in bridge engineering. The main function of cofferdams is to retain water and soil for bridge construction caps and bear various pressures. Steel sheet pile cofferdam, steel box cofferdam, steel hanging box cofferdam, steel pipe pile cofferdam, etc. are mostly used, but the cost of steel box and steel hanging box cofferdam is relatively high, the construction is difficult, and the construction area is large; Although the steel sheet pile cofferdam has the advantages of fast construction speed, good economic benefits, and reusability, it has high technical requirements an...

AI Technical Summary

Problems solved by technology

[0002] In recent years, with the rapid development of my country's basic transportation construction, cofferdam construction technology has been widely used in bridge engineering. The main function of cofferdams is to retain water and soil for bridge construction caps and bear various pressures. Steel sheet pile cofferdam, steel box cofferdam, steel hanging box cofferdam, steel pipe pile cofferdam, etc. are mostly used, but the cost of steel box and steel hanging box cofferdam is relatively high, the construction is difficult, and the construction area is large; Although the steel sheet pile cofferdam has the advantages of fast construction speed, good economic benefits, and reusability, it has high technical requirements and is easy to deform; although the steel pipe pile cofferdam has the advantages of short construction period, high overall rigidity, and high material utilization rate, etc. , but the cost is relatively higher

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