Drainage concrete pile with adjustable opening rate and preparation method thereof

Abstract

This invention discloses a drainage concrete pile with adjustable opening ratio and its preparation method, belonging to the field of geotechnical engineering foundation treatment technology. The drainage concrete pile includes a cylindrical pile body and multiple drainage holes penetrating the sidewall of the pile body. Its opening ratio is adjustable between 5% and 30%, and the opening ratio is the ratio of the total area of ​​the drainage holes to the side surface area of ​​the pile body. By constructing a graded adjustable opening ratio system, combined with modified concrete formula optimization and a spiral drainage hole distribution design, this invention allows for flexible adjustment of the opening ratio according to the working conditions such as the water content, bearing capacity, and consolidation period of the soft soil foundation, achieving precise coordination between drainage efficiency and structural strength. This invention also provides a parametric design method and preparation process based on Terzaghi's consolidation theory and Darcy's law, effectively solving the problems of prominent "drainage-strength" contradictions and poor adaptability to working conditions in traditional drainage concrete piles. It has advantages such as high structural stability, uniform drainage, wide applicability, and ease of industrial production.

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