Method and device for producing concrete pile

Abstract

The invention provides a method and device for producing a concrete pile. The device 100 for producing the concrete pile is provided with a mold comprising: outer mold bodies 10; outer mold water discharge sections 60; an inner mold 20; and edge molds 30. Water discharge holes 62a communicating with the exterior are provided to the molding surfaces of the mold. The mold is configured so that it is possible to reduce or enlarge a pile molding space S for press molding a concrete pile. Concrete is introduced into the pile molding space, the pile molding space is reduced and the concrete is subjected to press molding, water discharged from the concrete by the press molding is discharged from the water discharge holes to the exterior of the mold, the result is held for a predetermined length of time, and the concrete is cured.

Description

technical field [0001] The present invention relates to a manufacturing method and a manufacturing device of a concrete pile. Background technique [0002] Patent Document 1 describes a technique of compression-molding concrete by reducing the molding space as a low-cost, low-noise production of concrete piles instead of a large centrifugal force molding machine. [0003] In Patent Document 1, a member made of a water-permeable material such as rigid polyurethane is arranged in a formwork as a storage space for water discharged from concrete by compression molding. [0004] Patent Document 1: Japanese Patent Laid-Open No. 2015-142966 [0005] According to the above-mentioned prior art, a part of the forming surface can be made of a water-permeable material such as hard polyurethane, but it is difficult to form a concrete pile with high dimensional accuracy due to deformation due to pressure during compression molding. Moreover, when the pressure at the time of compression ...

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Problems solved by technology

[0005] According to the above-mentioned prior art, a part of the forming surface can be made of a water-permeable material such as rigid polyurethane, but it is difficult to form concrete piles with high dimensional accuracy due to deformation due to pressure during compression molding

In addition, if the pressure during compression molding is kept low in order to suppress deformation, the strength of the concrete pile cannot be improved.

[0006] In addition, the water drainage from the concrete may remain at the water retention capacity of the water-permeable material such as rigid polyurethane placed in the formwork, and the drainage may become insufficient, so it is difficult to manufacture concrete piles with the desired moisture content and desired strength.

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