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Verification of a novel stress path method by true-triaxial test
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Journal Article
Verification of a novel stress path method by true-triaxial test
2024
Overview
To verify the novel method of achieving a true-triaxial stress path with the pseudo-triaxial apparatus, a series of drained and undrained tests were carried out for the identical scheme with pseudo-triaxial apparatus and true-triaxial apparatus respectively. The differences between the two types of tests were quantified. The results show that the novel method effectively achieved the true-triaxial stress path by controlling the loading ratio of the pseudo-triaxial apparatus. The relationships of
q
−
ε
1
and
η
−
ε
s
measured by the two apparatuses had a higher similarity which decreases slightly with the
b
increase. When 0 ≤
b
< 0.5, the slope of the critical state line measured by both apparatuses was almost identical. When 0.5 ≤
b
≤ 1, the slope of the critical state line measured by the novel method was slightly lower, but the biggest change was within 10% compared with the two Mohr–Coulomb criteria, the peak strength measured by the two apparatuses was distributed near the criteria, indicating the feasibility and rationality of the novel method. The tests show that the novel method greatly enriches the test range of pseudo-triaxial apparatus, which not only simplifies the process of soil 3D testing but also reduces the test cost.
Publisher
Nature Publishing Group UK,Nature Publishing Group,Nature Portfolio
Subject
