A kind of pile core with self-stirring and anti-separation functions and its construction method

Abstract

The invention discloses a stiff core stirring pile core with a self-stirring function and an anti-disengagement function. The stiff core stirring pile core comprises a prefabricated pile core and a stirring sleeve arranged on the prefabricated pile core in a sleeved mode, and the prefabricated pile core comprises a pile body and a pile tip arranged at the bottom end of the pile body; a plurality of grooves are formed in the outer wall of the upper portion of the pile body, and a plurality of stirring blades distributed in the radial direction of the pile body are arranged on the outer wall ofthe bottom of the pile body; and a slurry spraying hole is formed in the center of the pile body and serves as a channel for guniting. The invention further discloses a construction method of the stiff core stirring pile core with the self-stirring function and the anti-disengagement function. The construction method comprises the following steps that the pile core is prefabricated; a stirring pile machine is put in place; the stirring pile machine is connected with the stirring sleeve; drilling, stirring and guniting is carried out; the stirring sleeve is taken out; and the pile is formed. The stiff core stirring pile core is simple in structure, convenient to use and high in practicability, and improves the construction efficiency and the bearing capacity of the cement stirring pile, andhas a good application prospect.

Description

technical field [0001] The invention relates to a construction device for a cement-soil mixing pile, in particular to a core of a strong core mixing pile with self-stirring and anti-separation functions and a construction method thereof. Background technique [0002] In the reinforcement treatment of soft soil foundation, simple cement-soil mixing piles are widely used, that is, cement is used as a curing agent and mixed with underground soft soil to harden the soft soil into a structure with good integrity and high bearing capacity. The purpose of composite foundations. However, due to the limited bearing capacity of cement, the bearing capacity of simple cement mixing piles is not too high. In order to improve the bearing capacity of the cement-soil mixing pile, a prefabricated pile core can be inserted into the cement-soil mixing pile to form a strong core mixing pile, which improves the bearing capacity of the cement-soil mixing pile to a certain extent. However, the i...

AI Technical Summary

Problems solved by technology

However, the inserted prefabricated pile core is relatively smooth, and the side frictional resistance between the side of the pile and the surrounding soil is small. When the upper load is too large, the pile will break away from the surrounding soil.

In addition, for areas with high groundwater levels and prominent buoyancy, it is difficult for cement mixing piles to play an anti-floating role, which brings hidden dangers to the project

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