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Abstract

The new environmental homogeneous plastic (EHP) pile improves the construction technology of traditional soil-cement mixing piles. It mixes the soil-cement slurry evenly in advance and then pours it into holes, so as to form piles with controllable physical properties. In order to test the strength of EHP piles, direct shear tests were carried out on field core sampling, field stirring sampling, and laboratory sampling, and the effects of pile depth, cement content, age, and curing conditions on shear strength were discussed. The test results show that the shear stress-displacement curve of the in-situ core sample is strain-softening; the shear strength distributes uniformly along the depth of the pile and increases with the increase in vertical pressure; the cohesion fluctuates based on a certain value, and the internal friction angle is little affected by the cement content. The shear strength of the standard curing samples in the laboratory tends to be stable at 14 days of age, with high early strength, and the mixing uniformity and curing conditions have a great influence on the shear strength. The shear strength of the in-situ core sample is lower than that of the standard curing sample in the laboratory, and the total mean shear strength reduction coefficient decreases with the increase in cement content, or in other words, the strength difference between the two increases.

Publication Date

3-17-2023

DOI

10.14048/j.issn.1671-2579.2023.01.003

First Page

19

Last Page

24

Submission Date

March 2025

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