phc pipe pile and its sinking method

Abstract

The invention provides a PHC tubular pile and a pile sinking method of the PHC tubular pile. The PHC tubular pile comprises a pile body and a steel shoe, wherein a stirrup densifying section is arranged at the upper end of the pile body, the separation distance between every two adjacent stirrups of the stirrup densifying section is smaller than the separation distance between every two adjacent stirrups on the rest of the pile body, the steel shoe is arranged at the bottom end of the pile body, the steel shoe comprises a steel shoe body, a radial rib plate and an expansion ring, the radial rib plate is arranged on the outer wall of the steel shoe body, and the expansion ring is arranged on the outer wall of the bottom end of the pile body. The PHC tubular pile can pass through the thick sand soil layer in the process of pile sinking.

Description

technical field [0001] The invention relates to the field of civil engineering, in particular to a PHC pipe pile and a pile driving method thereof. Background technique [0002] PHC pipe pile: the full name is the prestressed high-intensity concrete pipe pile. It is a kind of pipe pile made in a professional factory using pretensioning prestressing and centrifugal forming technology, and after autoclaving curing. For details, refer to the corresponding domestic National Standard Atlas "Prestressed Concrete Pipe Pile" (10G409) [0003] In actual engineering, more and more ground treatment projects located in soft soil foundation areas are replaced by PHC pipe piles, square piles and cast-in-place piles. However, in some actual projects, there is a weak substratum in the soil layer. Since the project has high requirements for settlement control, the soil layer below the weak substratum must be used as the bearing layer. Therefore, generally speaking, PHC pipe piles need It p...

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Problems solved by technology

[0006] 1) Compared with PHC piles, the bearing capacity of single piles with the same diameter is lower due to the lack of soil squeezing effect

[0007] 2) The quality of pile sinking is restricted by the construction conditions on site. It is necessary to form holes on site, make steel cages, and the concrete pouring process is complicated, and the construction is cumbersome. It is difficult to control the quality of piles.

[0009] 4) The construction speed is restricted by the equipment, and the pile sinking speed of each pile for each pile foundation is slower than that of PHC piles

[0010] 5) The bored pile construction site will appear dirty with mud flowing all over the ground, and the construction site will be busy with pumping water and piling up soil.

[0011] In view of the above problems, the design of new PHC pipe piles and PHC pile sinking technology is one of the key issues to solve the problems of easy pile breakage and failure to sink piles when passing through thicker sandy soil layers in the pile sinking process

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