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Abstract

In order to make full use of high liquid limit soil and reduce waste, the mechanism of improving high liquid limit soil modulus by gravel was studied. Dynamic triaxial test, coarse aggregate gap rate test, and industrial CT scan were carried out to study the variation of modulus of gravel-modified high liquid limit soil from two aspects: gravel content and gravel gradation. The test results show that there is a critical value. When the gravel content is less than 43.8%, the soil is a suspension-dense structure, and the modulus growth is slow; when the gravel content is more than 43.8%, the soil is a skeleton-dense structure, and the modulus growth is faster. Gravel gradation tends to the lower limit, and the modulus increases with the increase in coarse aggregate content. The coarse aggregate inside the soil forms a skeleton through contact. With the increase in the coarse aggregate contact point, the skeleton structure is constantly improved, and the modulus is constantly increased and grows fast. The research can provide a reference for the rational utilization of high liquid limit soil.

Publication Date

1-18-2024

DOI

10.14048/j.issn.1671-2579.2022.06.032

First Page

174

Last Page

178

Submission Date

May 2025

Reference

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