A kind of construction method of strong core expanding bottom pile

Abstract

The invention discloses a stiffening core bottom expanding pile construction method. The stiffening core bottom expanding pile construction method comprises the following steps that construction preparation is carried out, specifically, internal and external pile driving pipe heads of construction equipment are aligned to pile positions; pile driving is carried out to an elevation, internal and external pipes are gradually sunk to the designed elevation; expansion construction is carried out at the pile body end, a pile end expansion body is formed by squeezing or ramming by using the internalpipe at different times; and then pile-driving forming is carried out on the external layer, the middle layer and the internal layer of a pile body in sequence to complete the construction of the whole pile body. Compared with the prior art, according to the stiffening core bottom expanding pile construction method, through a static pressure pile driving machine or a vibration pipe sinking pile machine, the internal and external pipes are constructed on the same equipment, and a hole is formed and a pile is formed, the construction efficiency is improved, and the verticality of the pile bodyis improved; and after soil around the main body of a pile shaft is compacted for multiple times, the pile side friction resistance is increased significantly, and the strength of the pile shaft is increased significantly, and is significantly higher than that of the same proportion of normal drilling underwater concrete and vibration pipe sinking pile concrete.

Description

technical field [0001] The design of the present invention relates to the technical field of building construction, and specifically refers to a construction method of core-cored and bottom-expanded piles. Background technique [0002] New materials and new techniques of pile foundations are constantly appearing, but because the piles only interact with the embedded soil in the end, the principle is to increase the frictional resistance of the pile side wall and the bearing capacity of the pile tip; the current existing construction methods are only for one of them , either to increase the frictional resistance of the pile side wall, or to increase the bearing capacity of the pile tip. There is a lack of a new construction method, which can not only increase the frictional resistance of the pile side wall and the bearing capacity of the pile tip, but also improve the quality of the pile body. Contents of the invention [0003] The technical problem to be solved by the pres...

AI Technical Summary

Problems solved by technology

[0002] New materials and new techniques of pile foundations are constantly appearing, but because the piles only interact with the embedded soil in the end, the principle is to increase the frictional resistance of the pile side wall and the bearing capacity of the pile tip; the current existing construction methods are only for one of them , either to increase the pile side wall friction resistance, or to increase the pile tip bearing capacity, lack of a new construction method, which can not only increase the pile side wall friction resistance and pile tip bearing capacity, but also improve the quality of the pile body

Images