Bearing permeable concrete-ECC composite precast pile and preparation method thereof

Abstract

The invention relates to the technical field of concrete permeable piles, in particular to a bearing permeable concrete-ECC composite precast pile and a preparation method thereof. The composite precast pile comprises an outer layer, an inner layer, a connecting piece, a drill bit and a pile top protection cap; the inner layer is of a columnar structure made of ECC concrete, the side wall of the inner layer is wrapped with the outer layer made of permeable concrete, and the upper end of the inner layer is higher than the upper end of the outer layer to form a convex part; the drill bit is fixed to the lower end of the inner layer through the connecting piece; the pile top protection cap is of a cylindrical body with a groove, and the convex part can be inserted into the groove and closelymatched with the groove. According to the composite precast pile, good bending performance is provided for a pile body through the excellent tension strain-hardening performance and ductility of the ECC concrete of the inner layer, and a certain degree of horizontal displacement of a pile head is achieved; and the permeability performance of the pile body is ensured by the permeable concrete of the outer layer, the effect of a vertical drainage channel can be achieved, so as to accelerate the dissipation of excess pore water pressure of soil, and the consolidation rate of a foundation is increased.

Description

technical field [0001] The invention relates to the technical field of concrete permeable piles, in particular to a load-bearing permeable concrete-ECC composite prefabricated pile and a preparation method thereof. Background technique [0002] The information disclosed in the Background of the Invention is only intended to increase the understanding of the general background of the invention, and is not necessarily to be taken as an acknowledgment or any form of suggestion that the information constitutes the prior art that is already known to those skilled in the art. [0003] Existing permeable pile technology, such as ordinary permeable concrete pile or ordinary gravel pile, because of its large porosity and strong permeability, can play the role of pile bearing, and can also play the role of vertical drainage channel to speed up soil overburden. The dissipation of static pore water pressure increases the rate of foundation consolidation, which is favored in engineering....

AI Technical Summary

Problems solved by technology

But there are still the following deficiencies: First, the ability of the above-mentioned permeable piles to bear horizontal loads is relatively low; Concrete piles are prone to fracture and damage due to their low flexural strength, which will adversely affect the vertical bearing capacity.

Secondly, the construction process is particularly complicated, especially the ordinary permeable concrete piles are prone to concrete segregation during the construction process, and the slow consolidation speed is easy to cause hole plugging, which makes the construction speed of permeable concrete piles slow on site and difficult to control the construction quality

These deficiencies limit the popularization and application of existing permeable pile technology in civil engineering

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