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Abstract

The combined grouting technology of pile foundation injects high-pressure cement slurry at pile tips and sides, effectively eliminating the inherent defects such as the sediment at the bottom of the traditional drilled pile and the mud skin of the pile body through the effects of the slurry penetration and splitting in the soil, and it enhances the strength of the soil at pile tips and sides, so as to improve the bearing capacity of the pile foundation and reduce the settlement of the pile foundation. In this paper, finite element software was used to numerically analyze the pile foundation with and without combined grouting, and the influence of combined grouting on the bearing capacity and settlement of the pile foundation was compared. The technical parameters of pile foundation grouting in JTG 3363-2019 Specifications for Design of Foundation of Highway Bridges and Culverts were taken as the design guidance. The reinforced coefficient of friction at pile tips and sides and the theoretical grouting amount were analyzed and determined, and the combined grouting design was carried out. The combined grouting test of the pile foundation was conducted to verify the design results and ensure the reliability of the design. The research results can provide a reference for the design and application of combined grouting in highway bridges.

Publication Date

1-18-2024

DOI

10.14048/j.issn.1671-2579.2022.06.020

First Page

113

Last Page

117

Submission Date

May 2025

Reference

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