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Abstract

In order to evaluate the improvement effect of fiber on the brittle damage of cement soil, a triaxial unconsolidated undrained (UU) test was carried out on glass fiber cement soil (GCS) with a curing age of 7 d and a mass fraction of glass fiber (GF) of 0, 2‰, 4‰, 6‰, and 8‰, respectively. The results show that: ① GCS retains the original strain softening characteristics of cement soil; ② For the same mass fraction of GF, the peak stress, peak strain, and residual strength of GCS samples increase gradually with the increase in confining pressure, but the brittleness index IB decreases gradually. ③ When the confining pressure is constant, the peak stress, peak strain, residual strength, and brittleness index of GCS samples are the best when the mass fraction of GF is 4‰. ④ The internal friction angle and cohesive force of modified cement soil with the optimum fiber content are increased by 8% and 50%, respectively, compared with that of plain cement soil, indicating that the modification of cement soil by GF is mainly achieved by improving cohesive force. The results show that it is feasible to modify coastal cement soil with appropriate GF to improve its brittle damage.

Publication Date

7-14-2023

DOI

10.14048/j.issn.1671-2579.2023.03.034

First Page

218

Last Page

225

Submission Date

March 2025

Reference

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