A load-bearing permeable concrete-ecc composite prefabricated pile and its preparation method

Abstract

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. The composite prefabricated pile includes an outer layer, an inner layer, connectors, a drill bit and a pile top protection cap; the inner layer is a columnar structure made of ECC concrete, and the outer layer of permeable concrete is wrapped on the side wall of the inner layer, and the inner layer The upper end of the layer is higher than the upper end of the outer layer to form a protrusion; the drill bit is fixed at the lower end of the inner layer through a connector; the pile top protection cap is a column with a groove, and the protrusion can be inserted into the groove and the groove work close with. In this kind of composite prefabricated pile, the excellent tensile strain-hardening performance and ductility of the inner ECC concrete provide good bending resistance for the pile body and allow a certain degree of horizontal displacement of the pile head. The permeable concrete on the outer layer ensures the water permeability of the pile body and can play the role of a vertical drainage channel to accelerate the dissipation of the super static pore water pressure of the soil and increase the rate of foundation consolidation.

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 this Background of the Invention is only for enhancement of understanding of the general background of the invention and should not necessarily be taken as an acknowledgement or any form of suggestion that this information forms the prior art already known to a person of ordinary skill in the art. [0003] The existing permeable pile technology, such as ordinary permeable concrete piles or ordinary gravel piles, can play the role of bearing load of the pile body due to its large porosity and strong permeability, and can also play the role of vertical drainage channels to accelerate the soil overrun. The dissipation of static pore water pressure increases the rate of foundation consolidation, which is favor...

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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