Concrete pile construction method

Abstract

The invention provides a construction method for a concrete pile. The operations of pore-forming, wall protecting, soil-squeezing, diameter expanding and pile construction are completed at one time, a formed special-shaped pile body can significantly improve the bearing capacity of unit volume concrete, and the improvement of work efficiency and the reduction of the cost are achieved. The construction method comprises the steps that an outer tube which is provided with an expanding support at the bottom end of the outer tube and an inner tube sink to a designed depth simultaneously; the expanding support expands outward to squeeze the surrounding soil to form a diameter-expanding pile hole; the outer tube and the inner tube are lifted up simultaneously while concrete mixtures are transported into the internal tube of the inner tube and filled into the diameter-expanding pile hole; the operations of transporting the concrete mixtures and lifting up the outer tube and the inner tube are conducted continuously till the outer tube and the inner tube are lifted out of the foundation surface simultaneously, a concrete pile body with a larger diameter is formed in the foundations, and the cross section of the concrete pile body is shaped like a special shape or a circle or a square.

Description

technical field [0001] The invention relates to the field of civil engineering, in particular to pile construction technology. Background technique [0002] In the foundation treatment of buildings, cast-in-situ piles are commonly used foundation forms, which mainly increase the bearing capacity of piles through pile side friction resistance and partial end resistance. Therefore, when encountering buildings with high bearing capacity requirements, or foundations In the case of deep soft soil layers, it is necessary to increase the diameter and length of the pile body to meet the needs of the building, thus significantly increasing the construction cost and construction period. Therefore, people need a pile with a lower cost that can still meet the above-mentioned requirements. [0003] In recent years, a new type of supporting disc pile has been developed on the basis of traditional cast-in-place piles. The technical principle is to increase the bearing capacity of the pile...

AI Technical Summary

Problems solved by technology

However, this type of pile will often be damaged by mechanical equipment during construction. The reason is that when the expansion equipment is rotated to form a space for expanding the diameter of the disc, the compact soil to be expanded will affect the stiffness of the expansion equipment and the motor. The power requirements are very high, so the damage rate of construction equipment is aggravated, especially in hard soil layers such as gravel soil and sandy soil, it is difficult to form piles, resulting in increased costs and extended construction periods.

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